CN117357207B - Conveying system for deep vein thrombosis removing device under trunk - Google Patents
Conveying system for deep vein thrombosis removing device under trunk Download PDFInfo
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- CN117357207B CN117357207B CN202311649839.3A CN202311649839A CN117357207B CN 117357207 B CN117357207 B CN 117357207B CN 202311649839 A CN202311649839 A CN 202311649839A CN 117357207 B CN117357207 B CN 117357207B
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- 206010051055 Deep vein thrombosis Diseases 0.000 title claims abstract description 35
- 206010047249 Venous thrombosis Diseases 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 115
- 230000000149 penetrating effect Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 13
- 230000000670 limiting effect Effects 0.000 claims description 6
- 238000013156 embolectomy Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000003146 anticoagulant agent Substances 0.000 claims description 3
- 230000002537 thrombolytic effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000009424 thromboembolic effect Effects 0.000 claims 2
- 208000007536 Thrombosis Diseases 0.000 abstract description 14
- 230000000694 effects Effects 0.000 description 7
- 230000000717 retained effect Effects 0.000 description 5
- 210000003462 vein Anatomy 0.000 description 5
- 210000004204 blood vessel Anatomy 0.000 description 4
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 208000010378 Pulmonary Embolism Diseases 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 210000002073 venous valve Anatomy 0.000 description 2
- 206010000598 Acrodynia Diseases 0.000 description 1
- 231100000455 Acrodynia Toxicity 0.000 description 1
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 206010048591 Post thrombotic syndrome Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 208000000558 Varicose Ulcer Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000003511 endothelial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 208000030175 lameness Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000036407 pain Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000019612 pigmentation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses a conveying system for a deep vein thrombosis removing device under a trunk, which comprises the following components: outer sheath pipe, can wear to establish suction catheter and the catheter sealing subassembly in outer sheath pipe, catheter sealing subassembly includes: the handle is internally provided with a first channel penetrating through the handle along the axial direction, and the distal end of the handle is in sealing connection with the proximal end of the outer sheath; the outer half part of the screw cap can rotate circumferentially and is axially locked outside the proximal end of the handle, and a second channel penetrating through the screw cap along the axial direction is formed in the screw cap; the proximal end periphery Xiang Kasuo of the concave sealing ring is positioned on the inner surface of the rotary cap, the distal end periphery of the concave sealing ring is locked on the inner surface of the handle, and a middle channel penetrating through the concave sealing ring along the axial direction is arranged in the concave sealing ring; the first channel, the middle channel and the second channel are mutually communicated along the axial direction to form a catheter channel, and the proximal end of the suction catheter is penetrated in the catheter channel; the rotary cap rotates along the circumferential direction relative to the handle to drive the inward concave sealing ring to twist and deform along the circumferential direction, and the inward concave sealing ring tightly holds the suction catheter or the sealing catheter channel inserted into the catheter channel; the rotary cap rotates reversely relative to the handle along the circumferential direction to drive the concave sealing ring to recover. Solves the technical problem that the sealing component on the thrombus remover in the prior art can not reach complete sealing.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a conveying system for a deep vein thrombosis removing device.
Background
Deep vein thrombosis (deep venous thrombosis, DVT) is the clotting of blood in a limb (typically the lower leg or thigh) or deep pelvic vein. DVT is the primary cause of pulmonary embolism. DVT is caused by conditions that result in impaired venous return, lead to endothelial injury or dysfunction, or cause hypercoagulability. DVT may be asymptomatic or cause acrodynia and swelling. DVT should be given a positive and effective treatment early in the process, otherwise pulmonary embolism is extremely likely to occur.
Residual thrombus in the DVT affected lumen is mechanized in the later stage, and at this time, the venous valve is inevitably affected to cause insufficiency; venous blood reflux due to venous lumen blockage and long-term venous valve insufficiency can develop a series of chronic symptoms such as heaviness, swelling, pain, pigmentation and the like of the affected limb under the continuous action of the pathological state of venous hypertension, and further development can lead to venous lameness and venous ulcer, thereby forming deep venous thrombosis sequelae (post thrombotic syndrome, PTS). In the case of using the thrombolytic device to treat DVT, it is difficult for the sealing assembly on the thrombolytic device to completely ensure its tightness during use. Therefore, it is necessary to make modifications.
Disclosure of Invention
The invention aims at solving the technical problem that an upper sealing component of a thrombus remover cannot achieve complete sealing in the prior art, and aims to provide a conveying system for deep venous thrombus removal.
The invention provides a conveying system for a deep vein thrombosis removing device, which comprises the following components: an outer sheath, a suction catheter penetratable within the outer sheath, and a catheter seal assembly, the catheter seal assembly comprising:
a handle having a first passage extending therethrough in an axial direction, a distal end of the handle being sealingly connected to a proximal end of the outer sheath;
a screw cap, the outer half of which can rotate circumferentially and is locked axially outside the proximal end of the handle, the screw cap having a second channel therein penetrating the screw cap axially;
the proximal end of the inner concave sealing ring is locked on the inner surface of the rotary cap in a circumferential manner, the distal end of the inner concave sealing ring is locked on the inner surface of the handle in a circumferential manner, and a middle channel penetrating through the inner concave sealing ring in the axial direction is formed in the inner concave sealing ring;
the first channel, the middle channel and the second channel are mutually communicated along the axial direction to form a catheter channel, and the proximal end of the suction catheter is penetrated in the catheter channel;
the rotary cap rotates along the circumferential direction relative to the handle to drive the concave sealing ring to twist and deform along the circumferential direction, and the suction catheter inserted into the catheter channel is held tightly or the catheter channel is sealed; the rotary cap rotates reversely relative to the handle along the circumferential direction to drive the concave sealing ring to recover.
In a preferred embodiment of the invention, the distal end of the aspiration catheter has an aspiration tip that is retractably disposed within the distal end of the outer sheath.
In a preferred embodiment of the invention, the suction tip is a horn-type suction tip.
In a preferred embodiment of the invention, the distal end of the horn-shaped suction head has a smooth mouth.
In a preferred embodiment of the present invention, the delivery system for deep sub-body venous thrombosis further comprises a dilator assembly, which is insertable within the aspiration catheter.
In a preferred embodiment of the present invention, the dilator assembly has:
an expansion tube which can be arranged in the suction catheter in a penetrating way;
an expansion head end connected to the distal end of the expansion tube and capable of being exposed at the distal end of the suction catheter;
and the expansion handle is connected to the proximal end of the expansion tube, can be exposed out of the proximal end of the suction catheter and is used for operating the expander assembly to conduct guiding action.
In a preferred embodiment of the present invention, the catheter sealing assembly further comprises a locking member which locks the relative positions of the catheter sealing assembly and the cap when the cap is rotated to any position relative to the handle.
In a preferred embodiment of the present invention, the locking member includes: the clamping block and the circumferential clamping groove with a notch;
any one of the circumferential clamping groove and the clamping block is arranged on the handle, and the other one is arranged on the screw cap;
the screw cap is pushed towards the handle direction along the axial direction, the concave sealing ring is axially extruded, and the clamping block is clamped into the circumferential clamping groove along the notch.
In a preferred embodiment of the present invention, the circumferential clamping groove is disposed on the handle, the circumferential clamping groove with the notch is formed on the outer surface of the proximal end of the handle, the clamping block is formed on the inner surface of the distal end of the screw cap, and the clamping block at the distal end of the screw cap is clamped into the circumferential clamping groove at the proximal end of the handle through the notch.
In a preferred embodiment of the present invention, the circumferential clamping groove is disposed on the screw cap, the clamping block is disposed on the outer surface of the proximal end of the handle, the circumferential clamping groove with the notch is disposed on the inner surface of the distal end of the screw cap, and the clamping block on the proximal end of the handle is clamped into the circumferential clamping groove on the proximal end of the screw cap through the notch.
In a preferred embodiment of the present invention, a surface of the circumferential clamping groove abutting against the clamping block is a rough surface, and a surface of the clamping block abutting against the circumferential clamping groove is a rough surface.
In a preferred embodiment of the present invention, the plurality of clamping blocks and the plurality of circumferential clamping grooves are all in one-to-one correspondence, and each clamping block is clamped into the corresponding circumferential clamping groove.
In a preferred embodiment of the present invention, each of the circumferential clamping grooves is arranged in sequence along the circumferential direction of the handle, and one end of the circumferential clamping groove along the circumferential direction is closed, and the other end of the circumferential clamping groove is provided with the notch.
In a preferred embodiment of the present invention, a limit groove is disposed at a closed end of each circumferential clamping groove, and the limit groove is located at a side of the circumferential clamping groove facing the concave sealing ring;
the clamping blocks are clamped into the limiting grooves after moving to preset positions in the corresponding circumferential clamping grooves.
In a preferred embodiment of the invention, the cap is sleeved outside the proximal end of the handle;
the locking piece comprises a first vortex and a second vortex, the first vortex is arranged on the outer surface of the proximal end of the handle, the second vortex is arranged on the inner surface of the distal end of the screw cap, and the first vortex and the second vortex are matched with each other;
the first vortex is larger in radian than the second vortex.
In a preferred embodiment of the present invention, the locking member includes a first threaded surface and a second threaded surface, the first threaded surface is disposed on the handle, the second threaded surface is disposed on the cap, and the first threaded surface and the second threaded surface are mutually matched.
In a preferred embodiment of the present invention, the thread of any one of the first thread surface and the second thread surface is a loose-proof thread.
In a preferred embodiment of the present invention, the outer surface of the middle part and the inner surface of the middle part of the concave sealing ring are concave;
or the outer surface of the middle part of the concave sealing ring is concave, and the inner surface of the middle part is arc-shaped bulge;
and/or the inner surface of the concave sealing ring is provided with a hydrophilic coating;
and/or the screw cap is a transparent piece.
In a preferred embodiment of the present invention, a sealing ring is disposed on an outer ring surface of the concave sealing ring, and the sealing ring is in interference engagement with the handle.
In a preferred embodiment of the present invention, the delivery system for deep sub-body venous thrombosis further comprises a three-way valve in communication with the proximal end of the aspiration catheter.
In a preferred embodiment of the present invention, the delivery system for deep sub-body venous embolectomy further comprises a flared holder that is penetratable within the distal end of the aspiration catheter.
In a preferred embodiment of the present invention, the flare support includes:
the circumferential main frame is a circumferential hollowed-out bracket formed by a plurality of diamond-like brackets and can be arranged in the distal end of the suction catheter in a penetrating way;
the flaring frame is a plurality of bar-shaped brackets, one end of the flaring frame is connected with the far end of the circumferential main frame, and the other end of the flaring frame is retractably arranged in the suction head end in a penetrating manner and is used for guiding the suction head end to perform expansion action.
The invention has the positive progress effects that:
1) The outer half of the cap of the catheter sealing assembly of the delivery system for a deep-body venous embolectomy of the present invention is rotatable circumferentially and axially snap-lock to the exterior of the proximal end of the handle. The concave sealing ring is locked in the circumferential direction, so that the concave sealing ring can be driven to deform in a twisting way along the circumferential direction when the rotary cap rotates along the circumferential direction relative to the handle, and the concave sealing ring can be driven to recover when the rotary cap rotates along the circumferential direction relative to the handle. Because both ends of the concave sealing ring are respectively locked by the screw cap and the handle in the circumferential direction, the uniform twisting deformation in the circumferential direction, namely the twist deformation, can be realized, and the sealing is complete.
2) The pipe sealing assembly is provided with the locking piece such as the clamping block and the circumferential clamping groove with the notch, when the screw cap rotates to any position relative to the handle, the relative positions of the vortex sealing assembly for the pipe and the screw cap are locked, so that the screw cap and the handle cannot rotate in the screwing process, and complete sealing is achieved.
3) The middle part of sealing washer is the indent to here wall thickness is thinner relatively, makes the torsional counter-force at torsion in-process less, avoids gyration, and the middle part internal surface is equipped with the circular arc arch, and the internal diameter at the protruding position of circular arc is slightly less than the external diameter of expander subassembly, and the circular arc arch can hold the expander subassembly tightly when guiding the expander subassembly to stretch into and realize sealed effect.
4) The inner cavity of the concave sealing ring is provided with a hydrophilic coating, and the friction between the expander component and the inner cavity of the concave sealing ring is reduced due to the hydrophilic coating, so that the phenomenon of intermittent blocking in the process of extending into the expander component is avoided.
5) The pipe seal assembly is provided with a first vortex and a second vortex on an example locking piece, the first vortex and the second vortex are respectively arranged on the handle and the screw cap, the handle and the screw cap are mutually locked by the mutual matching of the first vortex and the second vortex, and the handle and the screw cap are mutually matched to achieve a tighter effect.
6) The locking piece of another example of the catheter sealing component is also provided with a first thread and a second thread, the first thread and the second thread are respectively arranged on the handle and the screw cap, and one thread is an anti-loose thread, so that the concave sealing ring keeps the sealing effect.
Drawings
Fig. 1 is a schematic view of a delivery system 10 for a deep vein thrombosis device in accordance with the present invention;
FIG. 2 is a schematic view of the catheter sealing assembly 13 of the present invention;
FIG. 3 is a partial cross-sectional view of the delivery system 10 for a deep vein thrombosis unit of the present invention;
fig. 4 is a schematic view of the aspirator 15 according to the present invention;
fig. 5A is an expanded view of the flare support 17 of the present invention;
fig. 5B is a schematic view of the structure of the flare support 17 of the present invention in the suction conduit 12;
fig. 5C is a front view of the flare support 17 of the present invention in the suction conduit 12;
fig. 5D is a top view of the flare support 17 of the present invention in the suction conduit 12;
FIG. 6A is a schematic view of the handle 131 of the present invention;
FIG. 6B is a top view of handle 131 of the present invention;
FIG. 6C is a front view of handle 131 of the present invention;
FIG. 6D is a schematic view of the structure of the screw cap 132 according to the present invention;
FIG. 6E is a schematic view of another embodiment of handle 131 according to the present invention;
FIG. 7 is a schematic view of another construction of the screw cap 132 of the present invention;
fig. 8 is a schematic structural diagram of the concave seal ring 133 of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
In the present invention, "distal", "proximal", "distal" and "proximal" are used as terms of orientation, which are terms commonly used in the field of interventional medical devices, where "distal" refers to an end or section of a surgical procedure that is distal to an operator, and "proximal" refers to an end or section of a surgical procedure that is proximal to an operator. Axial, refers to a direction parallel to the line connecting the distal center and the proximal center of the medical instrument; radial refers to a direction perpendicular to the axial direction.
As shown in fig. 1 to 3, the delivery system 10 for deep vein thrombosis removal according to the present invention includes: an outer sheath 11, an aspiration catheter 12 and a catheter seal assembly 13. Wherein the aspiration catheter 12 may be disposed within the outer sheath 11. The catheter seal assembly 13 includes: handle 131, cap 132 and indent sealing ring 133. The handle 131 has a first passageway 1311 therethrough in the axial direction and the distal end of the handle 131 is sealingly connected to the proximal end of the outer sheath 11. The cap 132 has a second passageway 1321 extending axially therethrough, and the outer half of the cap 132 is rotatable circumferentially and axially snap-lock to the exterior of the proximal end of the handle 131. The inner concave sealing ring 133 is provided with a middle channel 1331 penetrating through the inner concave sealing ring 133 along the axial direction, the proximal end periphery Xiang Kasuo of the inner concave sealing ring 133 is arranged on the inner surface of the rotary cap 132, the distal end of the inner concave sealing ring 133 is circumferentially locked on the inner surface of the handle 131, the first channel 1311, the middle channel 1331 and the second channel 1321 are mutually communicated along the axial direction to form a conduit channel 1341, and the proximal end of the suction conduit 12 is arranged in the conduit channel 1341 in a penetrating manner. When the screw cap 132 is rotated circumferentially relative to the handle 131, the concave seal ring 133 is driven to twist and deform circumferentially, thereby holding the suction catheter 12 or sealing the catheter passage 1341 within the catheter passage 1341. When the screw cap 132 is rotated in the circumferential direction in the opposite direction to the handle 131, the concave seal ring 133 is driven to restore the original shape, so that the catheter passage 1341 is kept clear, that is, the suction catheter 12 is kept clear.
As shown in fig. 1 to 5d, the conveying system 10 for deep vein thrombosis removal according to the present invention further includes: dilator assembly 14, guidewire, aspirator 15, three-way valve 16, and flare support 17.
The distal end of the suction catheter 12 has a suction tip 121, and since the suction catheter 12 is threaded into the outer sheath 11, the suction tip 121 is also retractably threaded into the distal end of the outer sheath 11. Preferably, the suction head 121 is a horn-shaped suction head 121, so as to be convenient for wrapping thrombus, and further preferably, the distal end of the horn-shaped suction head 121 has a smooth opening, so that the thrombus is prevented from being punctured in the process of drawing the thrombus and is convenient for scraping the thrombus in the blood vessel into the suction head 121, and the thrombus is drawn out.
The proximal end of the outer sheath 11 is flared and communicates with the distal end of the catheter sealing assembly 13 by adhesive or screw compression and seals against the outside world, sealing the aspiration catheter 12 with the catheter sealing assembly 13.
As shown in FIG. 4, aspirator 15 is similar to a syringe (typically a non-standard syringe), although other negative pressure devices are possible.
The proximal end of the aspiration catheter 12 is connected to a three-way valve 16, and the aspirator 15 is connected to the three-way valve 16 for aspiration of thrombus under negative pressure. Specifically, the three-way valve 16 has a connector 161, the connector 161 communicates with the aspiration catheter 12, and the aspirator 15 aspirates thrombus in the aspiration catheter 12 through the connector 161.
As shown in fig. 5a to 5d, the flare holder 17 includes: a circumferential main frame 171 and a flare frame 172. Wherein, the circumferential main frame 171 is a circumferential hollow frame formed by a plurality of diamond-like frames and can be arranged in the distal end of the suction catheter 12 in a penetrating way; the flaring bracket 172 is a plurality of bar-shaped brackets, one end of which is connected with the far end of the circumferential main frame 171, and the other end of which is retractably arranged in the suction head end 121 in a penetrating manner and is used for guiding the suction head end 121 to perform the expansion action. It is noted that the other end of the flare frame 172 is a smooth head, thereby making the distal end of the suction tip 121 a smooth mouth after expansion, facilitating removal of the thrombus.
Dilator assembly 14 is inserted into three-way valve 16, aspiration catheter 12, and flare support 17 in that order from the proximal end to the distal end. The dilator assembly 14 has a dilator tube 141, a dilator head end 142, and a dilator handle 143. The expansion tube 141 can be inserted through the three-way valve 16 and the suction catheter 12, and the core of the expansion tube 141 is perforated to have the function of passing through a guide wire. The expansion head end 142 is hollow and cone-like in shape, is connected to the distal end of the expansion tube 141, and can be exposed to the distal end of the suction catheter 12 for guiding the suction catheter 12 and the outer sheath 11.
The expanded head end 142 carries the aspiration catheter 12 and the outer sheath 31 along the guidewire into the body. The expansion head end 142 is conical, the surface is smooth and has no acute angle, the human blood vessel is prevented from being scratched, the expansion handle 143 is connected to the proximal end of the expansion tube 141 and can be exposed to the proximal end of the three-way valve 16 for operating the expander assembly 14 to conduct guiding action, at least one booster 143a is arranged on the periphery of the expansion handle 143, and the booster 143a extends outwards along the periphery of the expansion handle 143.
The specific aspiration procedure is as follows, first, a guidewire is pre-implanted into a blood vessel, the distal end of the guidewire being positioned within the deep vein below the torso and the proximal end being positioned outside the body. The catheter sealing assembly 13 is connected to the proximal end of the outer sheath 11, the suction catheter 12 is inserted into the outer sheath 11, the suction tip 121 of the suction catheter 12 and the flared support 17 in the distal end of the suction catheter 12 are retracted into the distal end of the outer sheath 11, the dilator assembly 14 is inserted into the suction catheter 12 and the flared support 17, the flared tip 142 is exposed out of the distal end of the suction catheter 12, the screw cap 132 is tightened, and the concave sealing ring 133 holds the dilator assembly 14 in the suction catheter 12.
The dilator assembly 14, aspiration catheter 12 and outer sheath 11 are advanced into the body along the guidewire, and after the distal ends of aspiration catheter 12 and outer sheath 11 reach the deep vein below the torso, the cap 132 is unscrewed, the dilator assembly 14 is withdrawn, the cap 132 is tightened, and the catheter passageway 1341 is closed. Only the suction catheter 12 and the outer sheath 11 are in the deep vein under the torso and the suction head 121 and the flared cradle 17 are in the distal end of the outer sheath 11. The outer sheath 11 is pulled out of the body, and then the suction head 121 is gradually exposed out of the distal end of the outer sheath 11, and the flared bracket 17 in the suction head 121 does not support the outer sheath 11, so that the flared bracket 172 of the flared bracket 17 drives the suction head 121 to be flared, the suction head 121 is horn-shaped, and the distal end of the horn-shaped suction head 121 is a smooth opening, so that thrombus is conveniently scraped and wrapped, and blood vessels are prevented from being punctured.
The aspirator 15 is connected to a connector 161 of the three-way valve 16, and the aspirator 15 is used for aspirating thrombus in deep veins under the trunk.
As further shown in fig. 2, the handle 131 of the catheter seal assembly 13 has a first passageway 1311 extending axially through the handle 131, the cap 132 has a second passageway 1321 extending axially through the cap 132, and the first passageway 1311 may communicate with the intermediate passageway 1331 of the female seal ring 133 and the second passageway 1321 of the cap 132 to form a catheter passageway 1341 for insertion of other items, such as a suction catheter 12, a dilator assembly 14, a guidewire, and the like.
By a counterclockwise or clockwise rotational movement of the screw cap 132 relative to the handle 131, the catheter passage 1341 can be quickly closed or opened.
In this example, when the screw cap 132 rotates circumferentially relative to the handle 131, the inner concave seal ring 133 is driven to twist and deform circumferentially, the suction catheter 12 or the sealing catheter channel 1341 inserted into the catheter channel 1341 is held tightly, when the screw cap 132 rotates circumferentially relative to the handle 131, the inner concave seal ring 133 is driven to recover, and at this time, as two ends of the inner concave seal ring 133 are respectively locked circumferentially by the screw cap 132 and the handle 131, the circumferential uniform twisting and deformation of the inner concave seal ring 133 is realized to be in a twist shape, so that the sealing is complete, and the problem that the deformation of the conventional axial inner concave sealing sleeve structure is uncontrollable during twisting and extrusion is avoided, so that the sealing is incomplete.
However, the inventors have found that during practical use, two problems occur when cap 132 is rotated relative to handle 131:
1. when the cap 132 is rotated clockwise (or counterclockwise) with respect to the handle 131 and then the second rotation is continued, the concave seal 133 is deformed by twisting, so that a rebound force is generated to drive the cap 132 to move counterclockwise. During the operation, the surgeon needs to rotate the cap 132 in place rapidly to block the catheter channel 1341 and prevent a large amount of blood from splashing.
2. When the doctor screws the cap 132 to the bottom, the cap 132 is also slowly loosened by the sealing ring 133 due to the elastic force of the concave sealing ring 133, so that the catheter passage 1341 cannot be completely sealed.
To solve the above-described problems (particularly the first problem), the catheter sealing assembly 13 in the delivery system for a deep-body venous embolectomy 10 of the present invention further has a locking member that locks the relative positions of the knob 131 and the knob 132 when the knob 132 is rotated to any position relative to the knob 131.
In one example, as shown in fig. 6A to 6D, the locking member includes a circumferential clamping groove 1312 and a clamping block 1322, the circumferential clamping groove 1312 is formed on the outer surface of the proximal end of the handle 131, the clamping block 1322 is formed on the inner surface of the distal end of the screw cap 132, and the circumferential clamping groove 1312 can be clamped with the clamping block 1322 on the inner surface of the screw cap 132.
As shown in fig. 6B, one end of the circumferential clamping groove 1312 in the circumferential direction is a closed end 1312a, and the other end is a notch 1312B. In the process of tightening the screw cap 132, the screw cap 132 is pushed in the axial direction toward the handle 131, at this time, the concave seal ring 133 is axially pressed, and the clamping block 1322 enters the circumferential clamping groove 1312 along the notch 1312b. In this process, since the concave seal ring 133 is axially pressed, the concave seal ring 133 generates a rebound force in the axial direction, so that the clamping block 1322 is pressed against the groove wall 1312d of the circumferential clamping groove 1312, and a friction force is generated between the clamping block 1322 and the groove wall 1312 d.
During screwing the screw cap 132, the clamping block 1322 slides along the circumferential direction in the circumferential clamping groove 1312, when a doctor screws the screw cap into the second screw cap, the clamping block 1322 can be fixed in the circumferential clamping groove 1312 during the screw cap 132 is not driven to rotate in the opposite direction by the resilience force of the concave sealing ring 133 due to the friction force between the clamping block 1322 and the groove wall 1312 d.
When the screw cap 132 is screwed to the bottom, the relative position between the screw cap 132 and the handle 131 can be fixed due to the friction force between the clamping block 1322 and the groove wall 1312d, so that the screw cap 132 is prevented from loosening, and the catheter channel 1341 can be ensured to be in a sealing state all the time.
When the cap 132 is unscrewed, the process is opposite to the above process, and thus, it is not repeated that, when the cap 132 is unscrewed, the clamping block 1322 slides out from the notch 1312b, and at this time, the clamping block 1322 and the circumferential clamping groove 1312 are separated from each other, and the concave sealing ring 133 is restored to the original state, so that the duct channel 1341 is opened.
Preferably, the surface of the circumferential clamping groove 1312 abutting against the clamping block 1322 is a rough surface, that is, the groove wall 1312d is a rough surface, and the surface of the clamping block 1322 abutting against the circumferential clamping groove 1312 is also a rough surface. Since the surfaces of the circumferential engagement groove 1312 and the engagement block 1322 are roughened, friction force can be increased.
In the present embodiment, the clamping block 1322 is located on the screw cap 132, and the circumferential clamping groove 1312 is located on the handle 131. In another embodiment, the latch 1322 may also be located on the handle 131, and the circumferential slot 1312 is located on the screw cap 132.
Further preferably, a limit groove 1312c is provided at the closed end 1312a, and the limit groove 1312c is located at a side of the circumferential clamping groove 1312 facing the inward concave seal ring 133. When the screw cap 132 is screwed to the bottom, the clamping block 1322 is clamped in the limiting groove 1312c, so that the clamping block 1322 is further prevented from sliding in the circumferential clamping groove 1312.
Preferably, the screw cap 132 is a transparent member to facilitate viewing of the status of the internal components. The concave seal ring 133 is an elastic member, and may be, for example, any of silica gel and rubber.
Further preferably, the plurality of clamping blocks 1322 and the plurality of circumferential clamping grooves 1312 are provided, each clamping block 1322 corresponds to each circumference Xiang Kacao 1312 one by one, and each clamping block 1322 is clamped into the corresponding circumferential clamping groove 1312. Specifically, the circumferential clamping grooves 1312 are sequentially arranged along the circumferential direction of the handle 131, and one end of the circumferential clamping groove 1312 along the circumferential direction is closed, and the other end is provided with a notch 1312b. As shown in fig. 6C, in the present embodiment, there are two circumferential clamping grooves 1312, and there are two notches 1312b.
Because the circumferential clamping grooves 1312 and the clamping blocks 1322 are all multiple, the anti-loosening friction force between the screw cap 132 and the handle 131 can be larger, and the screw cap 132 can be further prevented from automatically rotating in the opposite direction relative to the handle 131.
Further preferably, as shown in fig. 6D and 6E, the retaining member may further comprise a first vortex 1315 and a second vortex 1324, the first vortex 1315 of the proximal outer surface of the handle 131 cooperating with the second vortex 1324 of the inner surface of the cap 132, wherein the first vortex 1315 has a greater degree of curvature than the second vortex 1324.
The second vortex 1324 is sleeved outside the first vortex 1315, when the vortex radian of the first vortex 1315 is larger than that of the second vortex 1324, the closer the screw cap 132 is screwed to the circumferential direction, that is, the closer the fit between the first vortex 1315 and the second vortex 1324 is, the more the handle 131 and the screw cap 132 is fitted, the less the screw cap 132 is driven to rotate in the opposite direction by the concave seal ring 133.
In this example, the surface where the circumferential clamping groove 1312 abuts against the clamping block 1322 is a rough surface, the surface where the clamping block 1322 abuts against the circumferential clamping groove 1312 is a rough surface, when the screw cap 132 is twisted slightly in the axial direction toward the handle 131 and pressed, the concave sealing ring 133 is axially pressed, the clamping block 1322 on the inner surface of the distal end of the screw cap 132 is clamped into the circumferential clamping groove 1312 on the outer surface of the proximal end of the handle 131 along the notch 1312b, at this time, due to slight deformation of the concave sealing ring 133, rebound pressure is applied between the clamping block 1322 and the circumferential clamping groove 1312, the inner side wall of the clamping block 1322 on the screw cap 132 can abut against the circumferential clamping groove 1312 side wall of the handle 131, at this time, friction force between the clamping block 1322 and the circumferential clamping groove 1312 can not rotate, if the screw cap 132 is twisted again, the inner cavity of the concave sealing ring 133 is gradually reduced until the sealing is achieved in the twisting process, and as the twisting angle increases, the static force between the clamping block 1322 on the screw cap 132 and the circumferential clamping groove 1312 on the handle 131 is gradually increased, then the friction force on the inner cavity is not stopped until the friction force is retained at the corresponding position to the circumferential clamping groove 1312, and the friction force is retained after the friction force is not retained in the circumferential clamping groove is completely, and the friction effect is retained after the friction force is completely retained. Meanwhile, as shown in fig. 6D and 6E, a first scroll 1315 on the outer surface of the proximal end of the handle 131 is engaged with a second scroll 1324 on the inner surface of the cap 132, and the first scroll 1315 has a larger scroll curvature than the second scroll 1324, so that the handle 131 and the cap 132 are locked to each other.
As shown in fig. 8, the female seal ring 133 has an intermediate passage 1331 penetrating the female seal ring 133 in the axial direction, and the intermediate passage 1331 communicates with the first passage 1311 of the handle 131 and the second passage 1321 of the screw cap 132. The middle outer surface of the concave sealing ring 133 is concave, and the middle inner surface is arc-shaped convex (convex towards the axis direction), so that the wall thickness is relatively thin, the torsion reaction force in the torsion process is small, the rotation is avoided, the inner diameter of the arc-shaped convex position of the middle inner surface is slightly smaller than the outer diameter of the suction catheter 12, and the arc-shaped convex can hold the suction catheter 12 tightly and then hold the expander assembly 14 tightly while guiding the expander assembly 14 to extend into the suction catheter 12, so that the sealing effect is realized. The outer ring surface of the concave sealing ring 133 is provided with a closing ring 1332, and the closing ring 1332 is in interference fit with the handle 131. The proximal outer surface of the female seal ring 133 has a plurality of axial proximal detents 1333 connected to the axial cap detents 1323 of the screw cap 132, and the distal outer surface of the female seal ring 133 has a plurality of axial distal detents 1334 with the axial stem detents 1313 of the handle 131.
In addition, as shown in fig. 6C and 7, the proximal inner surface of the handle 131 has several axial stem detents 1313 that can snap into place with the female seal ring 133. The inner surface of the proximal end of the screw cap 132 has a plurality of axial cap clamping blocks 1323 which are clamped with the concave sealing ring 133. The proximal inner surface of the handle 131 has a plurality of axial handle detents that can engage the concave seal ring 133. The inner surface of the proximal end of the screw cap 132 has a plurality of axial cap detents that snap-fit with the concave seal ring 133. The proximal outer surface of the concave sealing ring 133 has a plurality of axial proximal clamping blocks connected with the axial cap clamping grooves of the screw cap 132, and the distal outer surface of the concave sealing ring 133 has a plurality of axial distal clamping blocks connected with the axial handle clamping grooves of the handle 131. The axial handle clamping grooves of the inner surface of the proximal end of the handle 131 are in one-to-one correspondence with the axial far clamping blocks of the outer surface of the distal end of the concave sealing ring 133, the axial cap clamping grooves of the inner surface of the proximal end of the rotary cap 132 are in one-to-one correspondence with the axial near clamping blocks of the outer surface of the proximal end of the concave sealing ring 133, namely, the proximal circumference Xiang Kasuo of the concave sealing ring 133 is on the inner surface of the rotary cap 132, and the distal circumference of the concave sealing ring 133 is clamped on the inner surface of the handle 131. In the axial direction, the latch 1322 is not aligned with any of the axial cap latches 1323.
It should be noted that, in some embodiments, the connection manner between the concave sealing ring 133 and the handle 131 and the screw cap 132 may be other, for example, adhesion, etc.
As further shown in fig. 2-3, the axial first channel 1311 in the handle 131, the axial second channel 1321 in the screw cap 132, and the axial intermediate channel 1331 in the concave seal ring 133 are axially interconnected to form a catheter channel 1341, and the formed catheter channel 1341 facilitates the penetration of the aspiration catheter 12 in the delivery system 10 for deep-body venous embolectomy. The circumferential clamping grooves 1312 on the outer surface of the proximal end of the handle 131 and the clamping blocks 1322 on the inner surface of the distal end of the screw cap 132 are multiple, each circumference Xiang Kacao 1312 corresponds to each clamping block 1322 one by one, each circumference Xiang Kacao 1312 is clamped into the corresponding clamping block 1322, namely the outer half part of the screw cap 132 can rotate circumferentially and axially clamped outside the proximal end of the handle 131. The axial handle clamping blocks 1313 on the inner surface of the proximal end of the handle 131 are in one-to-one correspondence with the axial far clamping grooves 1334 on the outer surface of the distal end of the concave sealing ring 133, the axial cap clamping blocks 1323 on the inner surface of the proximal end of the rotary cap 132 are in one-to-one correspondence with the axial near clamping grooves 1333 on the outer surface of the proximal end of the concave sealing ring 133, namely the proximal end periphery Xiang Kasuo of the concave sealing ring 133 is on the inner surface of the rotary cap 132, and the distal end periphery of the concave sealing ring 133 is clamped on the inner surface of the handle 131.
In another example, there is also provided a catheter sealing assembly 13 in a delivery system 10 for a deep-body venous thrombosis, substantially identical to the above-described example, with the main difference being that the locking member is, in this example, a structure in which a first threaded surface on an outer surface of the handle 131 and a second threaded surface on an outer surface of the cap 132 are mutually engaged, for example, a thread of any one of the first threaded surface and the second threaded surface is a loose-proof thread.
The catheter sealing assembly 13 in the conveying system 10 for the deep vein thrombosis removing device is characterized in that the two ends of the concave sealing ring 133 are respectively fixed in the handle 131 and the screw cap 132, and locking pieces are arranged on the handle 131 and the screw cap 132, so that the concave sealing ring 133 can be completely and uniformly sealed by twisting the screw cap 132, and the concave sealing ring 133 can still be sealed without rotating when the twisting is stopped halfway, so that the suction catheter 12 can be completely sealed.
And the handle 131 and the cap 132 are rotationally fixed, so that the catheter channel 1341 can be quickly closed or opened, and the dilator assembly 14 or the suction catheter 12 can be conveniently inserted or pulled out.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the embodiments are not to be interpreted as limiting the invention, which is defined by the appended claims.
Claims (19)
1. A delivery system for a deep sub-body venous embolectomy, comprising: an outer sheath, a suction catheter penetratable within the outer sheath, and a catheter seal assembly, the catheter seal assembly comprising:
a handle having a first passage extending therethrough in an axial direction, a distal end of the handle being sealingly connected to a proximal end of the outer sheath;
a screw cap, the outer half of which can rotate circumferentially and is locked axially outside the proximal end of the handle, the screw cap having a second channel therein penetrating the screw cap axially;
the proximal end of the inner concave sealing ring is locked on the inner surface of the rotary cap in a circumferential manner, the distal end of the inner concave sealing ring is locked on the inner surface of the handle in a circumferential manner, and a middle channel penetrating through the inner concave sealing ring in the axial direction is formed in the inner concave sealing ring;
the first channel, the middle channel and the second channel are mutually communicated along the axial direction to form a catheter channel, and the proximal end of the suction catheter is penetrated in the catheter channel;
the rotary cap rotates along the circumferential direction relative to the handle to drive the concave sealing ring to twist and deform along the circumferential direction, and the suction catheter inserted into the catheter channel is held tightly or the catheter channel is sealed; the rotary cap rotates reversely relative to the handle along the circumferential direction to drive the concave sealing ring to restore the original shape;
the catheter sealing assembly further comprises a locking piece, and when the screw cap rotates to any position relative to the handle, the locking piece locks the relative positions of the catheter sealing assembly and the screw cap;
the locking member includes: the clamping block and the circumferential clamping groove with a notch;
any one of the circumferential clamping groove and the clamping block is arranged on the handle, and the other one is arranged on the screw cap;
the rotary cap is pushed towards the handle direction along the axial direction, the concave sealing ring is axially extruded, the clamping block is clamped into the circumferential clamping groove along the notch, the clamping block is tightly pressed on the groove wall of the circumferential clamping groove, the surface of the circumferential clamping groove, which is abutted against the clamping block, is a rough surface, friction force is generated between the clamping block and the groove wall, and the rotary cap cannot be driven to rotate towards the opposite direction by the resilience force of the concave sealing ring;
and the clamping block can slide in the circumferential clamping groove along the circumferential direction in the process of screwing the screw cap.
2. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the outer surface of the proximal end of the concave sealing ring is provided with a plurality of axial near clamping grooves, the inner surface of the proximal end of the rotary cap is provided with a plurality of axial cap clamping blocks, and the axial cap clamping blocks of the rotary cap are correspondingly connected with the axial near clamping grooves of the concave sealing ring one by one;
the outer surface of the far end of the concave sealing ring is provided with a plurality of axial far clamping grooves, the handle is provided with a plurality of axial handle clamping blocks, and the axial handle clamping blocks of the handle are connected with the axial far clamping grooves of the concave sealing ring in a one-to-one correspondence manner.
3. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the outer surface of the proximal end of the concave sealing ring is provided with a plurality of axial proximal clamping blocks, the inner surface of the proximal end of the rotary cap is provided with axial cap clamping grooves, and the axial cap clamping grooves are in one-to-one corresponding clamping connection with the axial proximal clamping blocks;
the outer surface of the far end of the concave sealing ring is provided with a plurality of axial far clamping blocks, the handle is provided with a plurality of axial handle clamping grooves, and the axial handle clamping grooves of the handle are in one-to-one corresponding clamping connection with the axial far clamping blocks of the concave sealing ring.
4. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the distal end of the suction catheter has a suction tip that is retractably disposed within the distal end of the outer sheath.
5. The delivery system for a deep vein thrombosis unit according to claim 4 wherein,
the suction head end is a horn-shaped suction head end.
6. The delivery system for a deep vein thrombosis unit as recited in claim 5, wherein,
the distal end of the horn-shaped suction head has a smooth mouth.
7. The deep sub-body venous thromboembolic delivery system of claim 1, further comprising a dilator assembly penetratable within said aspiration catheter.
8. The delivery system for a deep vein thrombosis as set forth in claim 7 wherein said dilator assembly has:
an expansion tube which can be arranged in the suction catheter in a penetrating way;
an expansion head end connected to the distal end of the expansion tube and capable of being exposed at the distal end of the suction catheter;
and the expansion handle is connected to the proximal end of the expansion tube, can be exposed out of the proximal end of the suction catheter and is used for operating the expander assembly to conduct guiding action.
9. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the circumference draw-in groove set up with on the handle, the proximal end surface of handle has one take the breach circumference draw-in groove, the distal end internal surface of cap soon has one the fixture block, the distal end of cap soon the fixture block borrow the breach card is gone into in the circumference draw-in groove of handle proximal end.
10. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the circumference draw-in groove set up in on the cap soon, the proximal end surface of handle has one the fixture block, the distal end internal surface of cap soon has one take the breach circumference draw-in groove, the proximal end of handle the fixture block borrow the breach card is gone into in the circumference draw-in groove of cap near-end soon.
11. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the surface of the clamping block, which is abutted against the circumferential clamping groove, is a rough surface.
12. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the clamping blocks and the circumferential clamping grooves are multiple, the clamping blocks and the circumferential clamping grooves are in one-to-one correspondence, and the clamping blocks are clamped into the corresponding circumferential clamping grooves.
13. The delivery system for a deep vein thrombosis unit as recited in claim 12, wherein,
each circumferential clamping groove is sequentially arranged along the circumferential direction of the handle, one end of each circumferential clamping groove along the circumferential direction is closed, and the other end of each circumferential clamping groove is provided with the notch.
14. The delivery system for a deep vein thrombosis unit as recited in claim 13, wherein,
a limiting groove is formed in one closed end of each circumferential clamping groove, and the limiting groove is located on one side, facing the concave sealing ring, of each circumferential clamping groove;
the clamping blocks are clamped into the limiting grooves after moving to preset positions in the corresponding circumferential clamping grooves.
15. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
the outer surface and the inner surface of the middle part of the inward concave sealing ring are both inward concave;
or the outer surface of the middle part of the concave sealing ring is concave, and the inner surface of the middle part is arc-shaped bulge;
and/or the inner surface of the concave sealing ring is provided with a hydrophilic coating;
and/or the screw cap is a transparent piece.
16. The delivery system for a deep vein thrombosis unit as recited in claim 1, wherein,
and the outer ring surface of the concave sealing ring is provided with a closing ring, and the closing ring is in interference fit with the handle.
17. The deep sub-body venous thromboembolic delivery system of claim 1, further comprising a three-way valve in communication with a proximal end of the aspiration catheter.
18. The deep sub-torso venous thrombolytic delivery system of claim 1, further comprising a flared stent penetratable within a distal end of said aspiration catheter.
19. The delivery system for a deep vein thrombosis unit of claim 18, wherein said flare support comprises:
the circumferential main frame is a circumferential hollowed-out bracket formed by a plurality of diamond-like brackets and can be arranged in the distal end of the suction catheter in a penetrating way;
the flaring frame is a plurality of bar-shaped brackets, one end of the flaring frame is connected with the far end of the circumferential main frame, and the other end of the flaring frame is retractably arranged in the suction head end in a penetrating manner and is used for guiding the suction head end to perform expansion action.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311649839.3A CN117357207B (en) | 2023-12-05 | 2023-12-05 | Conveying system for deep vein thrombosis removing device under trunk |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311649839.3A CN117357207B (en) | 2023-12-05 | 2023-12-05 | Conveying system for deep vein thrombosis removing device under trunk |
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| CN117357207B true CN117357207B (en) | 2024-04-16 |
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| CN117357207A (en) | 2024-01-09 |
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