CN107789703A - The indwelling structure and remaining needle of a kind of remaining needle - Google Patents
The indwelling structure and remaining needle of a kind of remaining needle Download PDFInfo
- Publication number
- CN107789703A CN107789703A CN201711137632.2A CN201711137632A CN107789703A CN 107789703 A CN107789703 A CN 107789703A CN 201711137632 A CN201711137632 A CN 201711137632A CN 107789703 A CN107789703 A CN 107789703A
- Authority
- CN
- China
- Prior art keywords
- accommodating cavity
- chamber
- elastic deformation
- remaining needle
- block piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005489 elastic deformation Effects 0.000 claims description 68
- 239000007787 solid Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000282887 Suidae Species 0.000 description 1
- 241001661355 Synapsis Species 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The indwelling structure and remaining needle of a kind of remaining needle provided by the invention, wherein indwelling structure include catheter block, are provided with accommodating cavity in it, and the conduit for puncturing needle tubing can be housed by being installed with the cavity wall of accommodating cavity one end；Batching pig, it is available for puncture needle tubing to be fixedly installed in accommodating cavity with inserting or pull out, accommodating cavity is separated into close conduit and the first chamber connected with conduit, and the second chamber away from conduit；First chamber is sealed chamber, and side wall is provided with the feed liquor portion that can be connected with woven hose, and the side wall of accommodating cavity is provided with mounting hole；Block piece, it is fitted into by mounting hole in accommodating cavity and is connected with the cavity wall of accommodating cavity in axial restraint, stops that batching pig is deviate from from accommodating cavity.Because block piece is out of, the side wall of accommodating cavity mounting hole insertion accommodating cavity, facilitate installation when mounted, and block piece stress in accommodating cavity is smaller, it is not easy to be damaged, stop that the effect that batching pig is deviate from from conduit is not easy to fail.
Description
Technical field
The present invention relates to technical field of medical instruments, and in particular to the indwelling structure and remaining needle of a kind of remaining needle.
Background technology
Venous detaining needle is also known as venous catheter needle, mainly by that can be retained in endovascular soft conduit, stainless steel
Puncture needle, infusion connector and connecting line, the side of conduit are connected by connecting line with infusion connector, and conduit, which has, to be supplied
The contact pin end of puncture needle insertion and wear bundle isolation is installed close to contact pin end to the end that penetrates of patient's body, the inner chamber of conduit
Plug, when puncturing, puncture needle is inserted through batching pig deeply into conduit from contact pin end, and blood vessel is punctured into together with conduit
It is interior, after conduit fully enters blood vessel, puncture needle is withdrawn out, batching pig restores to the original state under its own resilient effect and will inserted
End blocks.In order to prevent batching pig from deviating from out of conduit, most products are poured in batching pig and conduit cavity using adhesive
Between gap, make both bond, due to the bonding destabilizing factor or quality problems of adhesive, and cause when pin is pulled out
Batching pig is extracted；Or sometimes pressure transfusion is needed giving emergency treatment to a patient, conduit cavity pressure is increased, and batching pig is gone out
Conduit and cause and leakage, blood outflow, air or germ occur and enter in patient vessel, seriously endanger the life peace of patient
Entirely.
Chinese patent literature CN204219516U discloses a kind of high pressure remaining needle, is provided with the inner chamber of conduit positioned at glue
High pressure loop between plug and contact pin end, to stop that plug ejects from contact pin end from the inner chamber of conduit.
Above-mentioned high pressure loop needs to be interference fitted with the inner chamber of conduit in the prior art, so causes the external diameter of high pressure loop will
Bigger than the diameter of conduit cavity, high pressure loop is inconvenient to install when loading conduit cavity, and high pressure loop is loading conduit cavity
The pressure of conduit is born afterwards, for a long time using that high pressure loop can be caused to be broken, causes to stop that plug acts on failure from conduit abjection.
The content of the invention
Therefore, the technical problem to be solved in the present invention is the batching pig barrier structure for overcoming remaining needle of the prior art
Be inconvenient to install when mounted and long-time use after be easily broken off causing stopping that plug acts on the defects of failing from conduit abjection,
So as to provide a kind of indwelling structure of convenient remaining needle installed and stopped plug and be not easy to fail from conduit abjection effect and stay
Put pin.
In order to solve the above technical problems, the indwelling structure and remaining needle of a kind of remaining needle provided by the invention, wherein indwelling
The indwelling structure of pin includes：
Catheter block, accommodating cavity is provided with it, be installed with to house in the cavity wall of described accommodating cavity one end and puncture leading for needle tubing
Pipe；
Batching pig, it is available for the puncture needle tubing to be fixedly installed on inserting or pull out in the accommodating cavity, will be described accommodating
Chamber is separated into the close conduit and the first chamber connected with the conduit, and the second chamber away from the conduit；It is described
First chamber is sealed chamber, and side wall is provided with the feed liquor portion that can be connected with woven hose, and the side wall of the accommodating cavity is provided with
Mounting hole；
Block piece, it is fitted into by the mounting hole in the accommodating cavity and is connected with the cavity wall of the accommodating cavity in axial restraint
Connect, stop that the batching pig is deviate from from the accommodating cavity.
The block piece is fitted into the second chamber by the mounting hole and with the cavity wall of the second chamber in axle
To being fixedly connected.
The block piece includes the elastic deformation end of body and setting on the body, and the block piece passes through extruding
The elastic deformation end enters the accommodating cavity.
Width of the body in axial direction matches with width of the mounting hole in axial direction.
The elastic deformation end includes being respectively arranged on two support arms at the body both ends, two support arms with described
Body forms U-shape structure together.
The elastic deformation end is provided with neck or projection, and the cavity wall of the second chamber is provided with and the elastic deformation
Neck or projection on end coordinate, limited the projection or neck of axial movement of the elastic deformation end along the second chamber.
It is additionally provided with the side wall of the second chamber and coordinates with the elastic deformation end, prevents the block piece from described the
The spacing hole deviate from two chambers.
The spacing hole is the through hole being oppositely arranged with the mounting hole；The elastic deformation end away from the body one
The spacing hole is stretched out at end, and the external diameter of external part is more than the aperture of the spacing hole.
The elastic deformation end's is provided with neck or projection with the contact position of the hole wall of the spacing hole, the spacing hole
Hole wall, which is provided with, to be coordinated with the neck or projection of the contact position, limits axial direction of the elastic deformation end along the second chamber
Mobile projection or neck.
Width of the spacing hole in axial direction matches with width of the external part in axial direction.
The mounting hole radially extends along the accommodating cavity.
The outer wall shape position corresponding with the second chamber for the part that the elastic deformation end enters in the second chamber
The cavity wall shape at the place of putting matches.
A kind of remaining needle provided by the invention, include the indwelling structure of described remaining needle.
Technical solution of the present invention, have the following advantages that：
1. the indwelling structure of remaining needle provided by the invention, by setting mounting hole in the side wall of accommodating cavity, using
When block piece is fitted into accommodating cavity from mounting hole, the cavity wall of block piece and accommodating cavity connects in axial restraint, and block piece exists
Axially it is immovable, the part that block piece is located in accommodating cavity can stop batching pig, prevent batching pig conduit cavity pressure compared with
Deviate from conduit in the case of big and trigger danger, because block piece is to be inserted from the mounting hole of the side wall of accommodating cavity in accommodating cavity,
Convenient installation during installation, and block piece stress in accommodating cavity is smaller, it is not easy to it is damaged, stops that batching pig takes off from conduit
The effect gone out is not easy to fail.
2. the indwelling structure of remaining needle provided by the invention, the block piece includes body and set on the body
Elastic deformation end, the block piece enters the accommodating cavity by extruding the elastic deformation end, by extruding elastic deformation
End can easily by block piece load accommodating cavity in, elastic deformation end enter accommodating cavity after lose extruding force return to it is original
State, the external diameter that block piece is located in accommodating cavity are more than the aperture of mounting hole, can prevent block piece from being moved in radial direction.
3. the indwelling structure of remaining needle provided by the invention, the body is in the width of axial direction and the mounting hole in axial direction
Width match, can prevent block piece from axial direction being rocked in accommodating cavity.
4. the indwelling structure of remaining needle provided by the invention, the elastic deformation end is provided with neck or projection, described
The cavity wall of two chambers, which is provided with, to be coordinated with the neck on the elastic deformation end or projection, limits the elastic deformation end along described
The projection or neck of the axial movement of second chamber, by the cavity wall of the neck on elastic deformation end or projection and second chamber
Neck or projection cooperation, elastic deformation end is fixed in second chamber, can further prevent block piece in the axial direction
It is mobile.
5. the indwelling structure of remaining needle provided by the invention, it is additionally provided with the side wall of the second chamber and the elasticity becomes
The spacing hole that shape end coordinates, prevents block piece from deviating from from the second chamber, the elastic deformation end of block piece load spacing hole
In, further it can prevent block piece from deviating from from accommodating cavity.
6. the indwelling structure of remaining needle provided by the invention, the spacing hole is to lead to what the mounting hole was oppositely arranged
Hole, can facilitate the installation of block piece, and the elastic deformation end stretches out one end away from the body spacing hole, and external part
External diameter be more than the spacing hole aperture, can so make block piece after installation is complete movement axially and radially all by
It is more preferable to limitation, blocking effect.
7. the indwelling structure of remaining needle provided by the invention, the elastic deformation end's connects with the hole wall of the spacing hole
Synapsis is provided with neck or projection, and the hole wall of the spacing hole, which is provided with, to be coordinated with the neck or projection of the contact position, limits institute
State the projection or neck of axial movement of the elastic deformation end along the second chamber, the neck or projection of elastic deformation end with it is spacing
Projection on the hole wall in hole or neck, which coordinate, makes elastic deformation end be fixed in spacing hole, can limit elastic deformation end axially,
The movement of radial direction, it is more preferable in axial direction, the movement of radial direction, blocking effect so as to limit block piece.
8. the indwelling structure of remaining needle provided by the invention, the spacing hole is in the width of axial direction and the external part in axle
To width match, can limit external part axial direction movement so as to limit block piece axial direction movement, blocking effect is more
It is good.
9. the indwelling structure of remaining needle provided by the invention, the mounting hole radially extend along the accommodating cavity, convenient
The installation of block piece, material can be saved, and it is more uniform to the barrier force of batching pig radially into the block piece of accommodating cavity,
Blocking effect is preferable.
9. the indwelling structure of remaining needle provided by the invention, the part that the elastic deformation end enters in the second chamber
Outer wall shape and the cavity wall shape of the second chamber corresponding position match, elastic deformation end enter second chamber after
Recover elastic force to be adjacent to second chamber cavity wall, movement of the block piece in radial direction can be prevented, it is compact-sized.
10. a kind of remaining needle provided by the invention, including the indwelling structure of remaining needle, the block piece of the remaining needle is convenient to pacify
Dress and stop batching pig act on from conduit abjection to be not easy to fail.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the profile of the indwelling structure for the remaining needle that embodiments of the invention 1 provide；
Fig. 2 is the structural representation of the indwelling structure of the remaining needle shown in Fig. 1；
Fig. 3 is the structural representation of the block piece shown in Fig. 1；
Fig. 4 is the sectional view for the remaining needle that the embodiment of the present invention 2 provides.
Description of reference numerals：
1- conduits；2- catheter blocks；3- batching pigs；
4- block pieces；21- mounting holes；22- spacing holes；
41- bodies；42- elastic deformation ends.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It is be combined with each other into conflict can.
Embodiment 1
As shown in figure 1, the present embodiment provides a kind of indwelling structure of remaining needle, including conduit 1, catheter block 2, batching pig 3,
Block piece 4.
Accommodating cavity is provided with the catheter block 2, puncture needle tubing can be housed by being installed with the cavity wall of described accommodating cavity one end
Conduit 1；The batching pig 3 is available for the puncture needle tubing to be fixedly installed on inserting or pull out in the accommodating cavity, by the appearance
Put chamber and be separated into the close conduit and the first chamber connected with the conduit, and the second chamber away from the conduit；Institute
It is sealed chamber to state first chamber, and side wall is provided with the feed liquor portion that can be connected with woven hose, as shown in Fig. 2 the accommodating cavity
Side wall be provided with mounting hole 21；The block piece 4 is fitted into the accommodating cavity by the mounting hole 21 and housed with described
The cavity wall of chamber connects in axial restraint, stops that the batching pig 3 is deviate from from the accommodating cavity.By in the side wall of accommodating cavity
Mounting hole 21 is set, is when in use fitted into block piece 4 in accommodating cavity from mounting hole 21, the cavity wall of block piece 4 and accommodating cavity
Being connected in axial restraint, block piece 4 is immovable in axial direction, and the part that block piece 4 is located in accommodating cavity can stop batching pig 3,
Prevent batching pig 3 from deviating from conduit in the case where conduit cavity pressure is larger and triggering danger, because block piece 4 is from accommodating cavity
The mounting hole 21 of side wall is inserted in accommodating cavity, facilitates installation when mounted, and the stress in accommodating cavity of block piece 4 is smaller, no
Easily it is damaged, stops that the effect that batching pig 3 is deviate from from conduit is not easy to fail.
The mounting hole 21 can be arranged on the accommodating cavity in the side wall in the outside of batching pig 3, the stop
Part 4 passes through the batching pig 3 to stop that the batching pig 3 is deviate from from the accommodating cavity by the mounting hole 21；Or
The mounting hole 21 is arranged in the side wall of the second chamber.In the present embodiment, as illustrated in fig. 1 and 2, the mounting hole
21 are arranged in the side wall of the second chamber, and the block piece 4 is fitted into the second chamber simultaneously by the mounting hole 21
It is connected with the cavity wall of the second chamber in axial restraint.
In the present embodiment, as shown in figure 3, the block piece 4 includes body 41 and is arranged on the body 41
Elastic deformation end 42, the block piece 4 enters the accommodating cavity by extruding the elastic deformation end 42, passes through and extrude elasticity
Deformed end 42 easily can load block piece 4 in accommodating cavity, and it is extensive that elastic deformation end 42 loses extruding force after accommodating cavity is entered
Free state is arrived again, and the external diameter that block piece 4 is located in accommodating cavity is more than the aperture of mounting hole 21, and block piece 4 can be prevented radially
Move in direction.
To prevent block piece 4 from axial direction being rocked in accommodating cavity, in the present embodiment, the body 41 is in axial direction
Width in axial direction of width and the mounting hole 21 match.
As shown in figure 4, the elastic deformation end 42 includes being respectively arranged on two support arms at the both ends of body 41, two institutes
State support arm and form U-shape structure together with the body 41, by extruding two support arms the block piece 4 can be made smoothly to enter
In the accommodating cavity, after two support arms are completely into the accommodating cavity losing extruding force returns to original state, can
Prevent block piece 4 from being moved in radial direction.In interchangeable embodiment, the elastic deformation end 42 is described including being arranged on
More than two support arms on the end of body 41, by extruding the support arm block piece 4 can be made smoothly to enter described house
In chamber.
Further to limit the movement of block piece 4 in the axial direction, the elastic deformation end 42 is provided with neck or projection, institute
The cavity wall for stating second chamber is provided with and coordinates with the neck on the elastic deformation end 42 or projection, limits the elastic deformation end
42 along the axial movement of the second chamber projection or neck, pass through the neck on elastic deformation end 42 or projection and the second chamber
The cooperation of neck or projection in the cavity wall of room, makes elastic deformation end 42 be fixed in second chamber.
Coordinate with the elastic deformation end 42 as shown in Fig. 2 being additionally provided with the side wall of the second chamber, prevent block piece
4 spacing holes 22 deviate from from the second chamber, the elastic deformation end 42 of block piece 4 are fitted into spacing hole 22, can be further
Prevent block piece 4 from deviating from from accommodating cavity.In the present embodiment, the spacing hole 22 is to be oppositely arranged with the mounting hole 21
Through hole, the installation of block piece 4 can be facilitated, the elastic deformation end 42 stretches out the spacing hole in one end away from the body 41
22, and the external diameter of external part be more than the spacing hole 22 aperture, can so make block piece 4 after installation is complete axially and
The movement of radial direction is all restricted, and blocking effect is preferable.
In the present embodiment, the elastic deformation end 42 with the contact position of the hole wall of the spacing hole 22 is provided with neck
Or projection, the hole wall of the spacing hole 22, which is provided with, to be coordinated with the neck or projection of the contact position, limits the elastic deformation
Projection or neck of the end 42 along the axial movement of the second chamber, neck or projection and the spacing hole 22 of elastic deformation end 42
Projection or neck on hole wall, which coordinate, makes elastic deformation end 42 be fixed in spacing hole 22, can further limit elastic deformation end 42
It is more preferable in axial direction, the movement of radial direction, blocking effect so as to limit block piece 4 in axial direction, the movement of radial direction.
For further limit elastic deformation end 42 axial direction position, in the present embodiment, the spacing hole 22 is in axle
To width in axial direction of width and the external part match, can so make external part immovable in the position of axial direction, from
And make elastic deformation end 42 immovable in the position of axial direction, it ensure that blocking effect.
In the present embodiment, so can be square as shown in figure 1, the radially extending along the accommodating cavity of the mounting hole 21
Just the installation of block piece 4, can save material, and radially into accommodating cavity block piece 4 to the barrier force of batching pig 3 more
Uniformly, blocking effect is preferable.
In the present embodiment, the outer wall shape for the part that the elastic deformation end 42 enters in the second chamber and institute
The cavity wall shape for stating second chamber corresponding position matches, and recovers elastic force and the after elastic deformation end 42 enters second chamber
Two chamber cavity walls are adjacent to, and can prevent movement of the block piece 4 in radial direction, compact-sized.In interchangeable embodiment, the bullet
Property deformed end 42 enter the second chamber shape and corresponding position cavity wall shape mismatch, as long as meet elasticity become
External diameter when shape end 42 is in free state is more than the aperture of mounting hole 21, can all prevent movement of the block piece 4 in radial direction.
When mounted, elastic deformation end 42 is directed at mounting hole 21, extruding elastic deformation end 42 makes elastic deformation end 42 suitable
Profit is entered in accommodating cavity by mounting hole 21, and installation operation is convenient, and elastic deformation end 42 is completely into losing extruding after accommodating cavity
Power returns to free state, and the external part of elastic deformation end 42 is caught in spacing hole 22, axial direction of the block piece 4 in accommodating cavity,
The movement of radial direction is all restricted, it is not easy to is deviate from from accommodating cavity, so as to stop plug when conduit cavity pressure is larger
Deviate from from accommodating cavity, can avoid causing danger.
Embodiment 2
It is illustrated in figure 4 a kind of embodiment of remaining needle, including the indwelling knot of remaining needle that embodiment 1 is provided
Structure, for needle tubing after the extraction of conduit 1, batching pig 3, which recovers elasticity, seals first chamber, when conduit cavity pressure is larger, stops
Part 4 can prevent batching pig 3 from deviating from from catheter block 2, and the block piece 4 of the remaining needle is convenient to be installed and stop batching pig 3 from conduit
Abjection effect is not easy to fail.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (13)
- A kind of 1. indwelling structure of remaining needle, it is characterised in that including：Catheter block (2), accommodating cavity is provided with it, the conduit for puncturing needle tubing can be housed by being installed with the cavity wall of described accommodating cavity one end (1)；Batching pig (3), it is available for the puncture needle tubing to be fixedly installed on inserting or pull out in the accommodating cavity, by the accommodating cavity It is separated into the close conduit (1) and the first chamber connected with the conduit (1), and the second chamber away from the conduit (1) Room；The first chamber is sealed chamber, and side wall is provided with the feed liquor portion that can be connected with woven hose, the side wall of the accommodating cavity It is provided with mounting hole (21)；Block piece (4), it is fitted into by the mounting hole (21) in the accommodating cavity and solid in axial direction with the cavity wall of the accommodating cavity Fixed connection, stops that the batching pig (3) is deviate from from the accommodating cavity.
- 2. the indwelling structure of remaining needle according to claim 1, it is characterised in that the block piece (4) passes through the peace Dress hole (21) is fitted into the second chamber and is connected with the cavity wall of the second chamber in axial restraint.
- 3. the indwelling structure of remaining needle according to claim 2, it is characterised in that the block piece (4) includes body (41) and elastic deformation end (42) on the body is set, the block piece (4) is by extruding the elastic deformation end (42) accommodating cavity is entered.
- 4. the indwelling structure of remaining needle according to claim 3, it is characterised in that width of the body (41) in axial direction Match with width of the mounting hole (21) in axial direction.
- 5. the indwelling structure of remaining needle according to claim 3, it is characterised in that the elastic deformation end (42) includes dividing Not She Yu body (41) both ends two support arms, two support arms form U-shape structure together with the body (41).
- 6. the indwelling structure of the remaining needle according to claim 3-5, it is characterised in that set on the elastic deformation end (42) Have neck or a projection, the cavity wall of the second chamber be provided with coordinate with the neck on the elastic deformation end (42) or projection, Limit the projection or neck of axial movement of the elastic deformation end (42) along the second chamber.
- 7. the indwelling structure of the remaining needle according to any one of claim 1-6, it is characterised in that the second chamber It is additionally provided with side wall and coordinates with the elastic deformation end (42), prevents what the block piece (4) from deviating from from the second chamber Spacing hole (22).
- 8. the indwelling structure of remaining needle according to claim 7, it is characterised in thatThe spacing hole (22) is the through hole being oppositely arranged with the mounting hole (21)；The spacing hole (22), and the external diameter of external part are stretched out in the one end of the elastic deformation end (42) away from the body (41) More than the aperture of the spacing hole (22).
- 9. the indwelling structure of the remaining needle according to claim 7 or 8, it is characterised in thatThe elastic deformation end (42) is provided with neck or projection with the contact position of the hole wall of the spacing hole (22), described spacing The hole wall in hole (22), which is provided with, to be coordinated with the neck or projection of the contact position, limits the elastic deformation end (42) along described the The projection or neck of the axial movement of two chambers.
- 10. the indwelling structure of the remaining needle according to claim 7 or 8, it is characterised in that the spacing hole (22) is in axial direction Width in axial direction of width and the external part match.
- 11. the indwelling structure of remaining needle according to claim 1, it is characterised in that the mounting hole (21) is along the appearance Put radially extending for chamber.
- 12. the indwelling structure of the remaining needle according to any one of claim 3-11, it is characterised in that the elastic deformation (42) are held into the outer wall shape and the cavity wall shape phase of the second chamber corresponding position of the part in the second chamber Matching.
- A kind of 13. remaining needle, it is characterised in that the indwelling structure including the remaining needle any one of claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137632.2A CN107789703A (en) | 2017-11-16 | 2017-11-16 | The indwelling structure and remaining needle of a kind of remaining needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137632.2A CN107789703A (en) | 2017-11-16 | 2017-11-16 | The indwelling structure and remaining needle of a kind of remaining needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107789703A true CN107789703A (en) | 2018-03-13 |
Family
ID=61535289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711137632.2A Pending CN107789703A (en) | 2017-11-16 | 2017-11-16 | The indwelling structure and remaining needle of a kind of remaining needle |
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| Country | Link |
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| CN (1) | CN107789703A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908431A (en) * | 2019-04-08 | 2019-06-21 | 深圳安特医疗股份有限公司 | Remaining needle and infusion device |
| CN113576536A (en) * | 2021-09-28 | 2021-11-02 | 深圳北芯生命科技股份有限公司 | Plugging device and withdrawing unit of intravascular ultrasonic withdrawing system |
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