CN219270896U - Vena cava cannula assembly and vena cava drainage system - Google Patents
Vena cava cannula assembly and vena cava drainage system Download PDFInfo
- Publication number
- CN219270896U CN219270896U CN202222971744.0U CN202222971744U CN219270896U CN 219270896 U CN219270896 U CN 219270896U CN 202222971744 U CN202222971744 U CN 202222971744U CN 219270896 U CN219270896 U CN 219270896U
- Authority
- CN
- China
- Prior art keywords
- pressure measuring
- vena cava
- main
- tube body
- measuring tube
- 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.)
- Active
Links
Images
Landscapes
- External Artificial Organs (AREA)
Abstract
The utility model discloses a vena cava cannula assembly and a vena cava drainage system, wherein the vena cava cannula assembly comprises a main cannula body, the inner end of the main cannula body is used for extending into the vena cava of a human body, and a main guide hole is formed at the end part of the main cannula body; the pressure measuring tube body is partially arranged in the main cannula body, the inner end of the pressure measuring tube body extends to the main leading hole, a communication hole is formed in the end part of the inner end of the pressure measuring tube body, and the outer end of the pressure measuring tube body extends out of the main cannula body and is used for being connected with a pressure measuring device; the vena cava drainage system comprises a main cannula body, an extracorporeal circulation machine, a pressure measuring tube body and a pressure measuring device. The utility model is convenient for monitoring the pressure of the inferior vena cava in real time during operation, so that medical staff can intuitively know the drainage condition of the inferior vena cava cannula, and is beneficial to timely adjusting the cannula position.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a vena cava cannula assembly and a vena cava drainage system.
Background
In cardiac surgery, the surgery is sometimes performed under the condition of extracorporeal circulation assistance and cardiac arrest, and at this time, extracorporeal circulation is often required to be established through ascending aorta and upper and lower vena cava cannulas; during pre-operative anesthesia, medical personnel typically implant deep vein catheters in the patient's neck for measuring superior vena cava pressure and/or administering the drug when needed; during operation, after the extracorporeal circulation is established through the ascending aorta, the upper vena cava cannula and the lower vena cava cannula, if the upper vena cava pressure is too high, the poor position of the upper vena cava cannula can be indicated, and drainage is not smooth, and at the moment, the drainage can be improved by adjusting the position of the upper vena cava cannula, so that the upper vena cava pressure is reduced.
However, due to the anatomy of the inferior vena cava of the human body, medical staff cannot measure the pressure of the inferior vena cava by implanting a deep vein catheter, and the existing inferior vena cava drainage tube also lacks a pressure measuring function; as an example of the prior art, patent CN 211611238U discloses a lower vena cava drainage tube for extracorporeal circulation operation of cardiac surgery (publication day: 10/2/2020), which comprises a tube body, wherein one end of the tube body is an external end penetrating through the skin and connected with an extracorporeal circulation machine, the other end of the tube body is an internal end connected with a lower vena cava, the external end is an inclined surface structure, the tail end of the inclined surface structure is provided with a flexible blocking film capable of being folded towards the inclined surface structure, the internal end is conical, a plurality of drainage holes are arranged on the conical shape, and the lower vena cava drainage tube cannot detect the pressure of the lower vena cava.
Therefore, whether the drainage of the intra-operative inferior vena cava cannula is sufficient or not is not evaluated by an exact pressure monitoring index, and the method can only depend on the experience judgment of medical staff on the circulation condition, so that the control is difficult to accurately control; once insufficient drainage is performed, the pressure of the inferior vena cava is increased, so that the liver, kidney and stomach intestine of a patient are blood stasis, and the postoperative recovery of the liver, kidney and stomach intestine functions is affected.
The technical problems described above need to be solved.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a vena cava cannula component and a vena cava drainage system so as to monitor the pressure of the inferior vena cava in real time in operation, enable medical staff to intuitively know the drainage condition of the inferior vena cava cannula and facilitate timely adjustment of the cannula position.
In one aspect, the utility model provides a vena cava cannula assembly, which comprises a main cannula body, wherein the inner end of the main cannula body is used for extending into a vena cava of a human body, and a main guide hole is formed in the inner end of the main cannula body;
the assembly further comprises a pressure measuring tube body, the pressure measuring tube body is partially placed in the main insertion tube body, the inner end of the pressure measuring tube body extends to the main guide hole, a communication hole is formed in the end portion of the inner end of the pressure measuring tube body, and the outer end of the pressure measuring tube body extends out of the main insertion tube body and is used for being connected with a pressure measuring device.
Preferably, the lateral wall of the outer end of the main cannula body is provided with a through hole, and the pressure measuring tube body penetrates into the main cannula body through the through hole.
Preferably, the via hole is provided with a sealing collar made of flexible material, the outer side wall of the sealing collar is clung to the wall of the via hole, and the inner side wall of the sealing collar is clung to the outer pipe wall of the pressure measuring pipe body.
Preferably, the pressure measuring pipe body is of a hard plastic pipe structure.
On the other hand, the utility model also provides a vena cava drainage system, which comprises a main cannula body, wherein the inner end of the main cannula body is used for extending into a vena cava of a human body, a main guiding hole is formed in the end part of the main cannula body, and the outer end of the main cannula body is connected with an extracorporeal circulation machine;
the system also comprises a pressure measuring tube body and a pressure measuring device for measuring the vena cava pressure, wherein the pressure measuring tube body is partially arranged in the main cannula body, the inner end of the pressure measuring tube body extends to the main guiding hole, a communicating hole is arranged at the end part of the inner end of the pressure measuring tube body, and the outer end of the pressure measuring tube body extends out of the main cannula body and is connected with the pressure measuring device.
Preferably, the system further comprises a selection tee; the first interface of the selection tee is connected with the outer end of the pressure measuring tube body, the second interface of the selection tee is connected with the pressure measuring device, and the third interface of the selection tee is connected with a drug feeder.
Preferably, the pressure gauge is of a pressure sensor structure, a signal output end of the pressure gauge is connected with a processor, a signal output end of the processor is connected with a display, and the display is used for displaying pressure information measured by the pressure gauge in real time.
Preferably, the signal output end of the processor is also connected with an alarm, and the alarm is used for sending out an alarm prompt when the pressure value measured by the pressure measuring device in real time is abnormal.
Preferably, the lateral wall of the outer end of the main cannula body is provided with a through hole, and the pressure measuring tube body penetrates into the main cannula body through the through hole.
Preferably, the via hole is provided with a sealing collar made of flexible material, the outer side wall of the sealing collar is clung to the wall of the via hole, and the inner side wall of the sealing collar is clung to the outer pipe wall of the pressure measuring pipe body.
Compared with the prior art, the utility model has the following beneficial technical effects:
after the extracorporeal circulation is established during operation, the pressure measuring tube body is also placed into the lower vena cava along with the main cannula body, the communicating hole at the inner end of the pressure measuring tube body is communicated with the lower vena cava, the outer end of the pressure measuring tube body is connected with the pressure measuring device, and the pressure of the lower vena cava can be measured in real time through the connection of the pressure measuring device, so that the pressure of the lower vena cava can be monitored in real time during operation, medical staff can intuitively know the drainage condition of the lower vena cava cannula, the cannula position can be adjusted in time, liver, kidney, stomach and intestine blood stasis caused by blood stasis of the lower vena cava of a patient is avoided, and recovery of liver, kidney, stomach and intestine functions of the patient after operation is facilitated.
Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
Fig. 1 is a front view of a vena cava cannula assembly in accordance with the utility model;
FIG. 2 is a cross-sectional view of a vena cava cannula assembly in accordance with the utility model;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is an enlarged view of FIG. 2 at B
Fig. 5 is a schematic diagram of a vena cava drainage system in accordance with the utility model.
Detailed Description
Example 1
The present embodiment provides a cannula assembly which is specifically intended for vena cava drainage (particularly inferior vena cava drainage, although of course use for superior vena cava drainage is not precluded) and is therefore a vena cava cannula assembly.
As shown in fig. 1 to 4, the assembly comprises a main cannula body 1, wherein the inner end (the part which is placed in the vena cava during operation, namely the lower end in fig. 1) of the main cannula body 1 is used for extending into the vena cava of a human body, and a main guiding hole 2 is formed at the end; the main structure of the main cannula body 1 and the use principle thereof can be the same as that of the existing vena cava drainage tube, for example, see patent CN 211611238U. The main drainage hole 2 plays a role in blood drainage, and besides the main drainage hole 2, a plurality of auxiliary drainage holes 3 can be arranged on the side wall of the inner end of the main cannula body 1 so as to improve drainage performance.
The assembly further comprises a pressure measuring tube body 4, wherein the pressure measuring tube body 4 is partially placed in the main cannula body 1, the inner end (the part which is placed in the vena cava during operation, namely the lower end in fig. 1) of the pressure measuring tube body extends to the main leading hole 2, a communication hole 5 is arranged at the end part of the inner end of the pressure measuring tube body 4, and the outer end (the part which is placed outside the vena cava during operation) of the pressure measuring tube body 4 extends out of the main cannula body 1 and is used for being connected with a pressure measuring device 6. The portion of the pressure measuring tube body 4 located in the main cannula body 1 may be bonded to the inner wall of the main cannula body 1, for example. The pipe diameter (outer diameter) of the pressure measuring pipe body 4 is smaller than that of the main insertion pipe body 1, for example, the pipe diameter of the pressure measuring pipe body 4 can be 1/8-1/5 of the pipe diameter of the main insertion pipe body 1, and other reasonable proportions are also possible.
The pressure measuring tube body 4 is preferably of a hard plastic tube structure so as to improve the structural strength and the position stability of the pressure measuring tube body; the pressure measuring tube body 4 is partially placed in the main cannula body 1 to prevent improper gaps between the main cannula body 1 and the vena cava during operation (the main cannula body 1 is bound and fixed with the vena cava through tightening a sleeve belt during operation).
Taking inferior vena cava drainage as an example, after the extracorporeal circulation is established during operation, the pressure measuring tube body 4 is also placed into the inferior vena cava along with the main cannula body 1, the communication hole 5 at the inner end of the pressure measuring tube body 4 is communicated with the inferior vena cava, the outer end of the pressure measuring tube body 4 is connected with the pressure measuring device 6 at the moment, and the inferior vena cava pressure can be measured in real time through the connection of the pressure measuring device 6, so that the pressure of the inferior vena cava can be monitored in real time during operation, medical staff can intuitively know the drainage condition of the inferior vena cava cannula, the cannula position can be adjusted in time, liver, kidney, stomach and intestine blood stasis caused by the blood stasis of the inferior vena cava of a patient is avoided, and the recovery of liver, kidney and stomach functions of the patient after operation is facilitated.
In this embodiment, a via hole 7 is formed on the side wall of the external end (the portion that is placed outside the vena cava during operation) of the main cannula body 1, and the pressure measuring tube body 4 penetrates into the main cannula body 1 through the via hole 7; the pressure measuring tube body 4 is inserted from the side edge of the main cannula body 1, so that interference with an extracorporeal circulation machine can be avoided; the shape and size of the through hole 7 are suitable for the pressure measuring tube body 4 to pass through, and can keep certain tightness to prevent the occurrence of blood leakage accidents.
Preferably, a sealing collar 7 made of flexible material can be arranged at the position of the through hole 7, the outer side wall of the sealing collar 7 is clung to the wall of the through hole 7, and the inner side wall of the sealing collar 7 is clung to the outer pipe wall of the pressure measuring pipe body 4; the sealing collar 7 may be made of, for example, silicone; the sealing performance of the connection between the main cannula body 1 and the pressure measuring tube body 4 can be improved through the arrangement of the sealing lantern ring 7; the longitudinal section of the sealing collar 7 may be "i" shaped, of course with a hollow channel to accommodate the pressure-measuring tube body 4.
Example two
The present embodiment provides a drainage system which is specifically used for vena cava drainage (particularly inferior vena cava drainage, although it is not excluded to be used for superior vena cava drainage), and thus is a vena cava drainage system, and can achieve extracorporeal blood circulation.
As shown in fig. 1 to 5, the system comprises a main cannula body 1, wherein the inner end of the main cannula body 1 is used for extending into a human vena cava, a main leading hole 2 is formed at the end, and the outer end of the main cannula body 1 is connected with an extracorporeal circulation machine 8; the main structure of the main cannula body 1 and the use principle thereof can be the same as that of the existing vena cava drainage tube, for example, see patent CN 211611238U. The main drainage hole 2 plays a role in blood drainage, and besides the main drainage hole 2, a plurality of auxiliary drainage holes can be formed in the side wall of the inner end of the main cannula body 1 so as to improve drainage performance.
The extracorporeal circulation machine 8 is used for pumping blood (or asystole), and has the same structure and principle as the prior art.
The system also comprises a pressure measuring tube body 4 and a pressure measuring device 6 for measuring the vena cava pressure, wherein the pressure measuring tube body 4 is partially arranged in the main cannula body 1, the inner end of the pressure measuring tube body extends to the main leading hole 2, a communication hole 5 is arranged at the end part of the inner end of the pressure measuring tube body 4, and the outer end of the pressure measuring tube body 4 extends out of the main cannula body 1 and is connected with the pressure measuring device 6.
The pressure measuring tube body 4 is preferably of a hard plastic tube structure so as to improve the structural strength and the position stability of the pressure measuring tube body; the pressure measuring tube body 4 is partially placed in the main cannula body 1 to prevent improper gaps between the main cannula body 1 and the vena cava during operation (the main cannula body 1 is bound and fixed with the vena cava through tightening a sleeve belt during operation). The portion of the pressure measuring tube body 4 located in the main cannula body 1 may be bonded to the inner wall of the main cannula body 1, for example. The pipe diameter (outer diameter) of the pressure measuring pipe body 4 is smaller than that of the main insertion pipe body 1, for example, the pipe diameter of the pressure measuring pipe body 4 can be 1/8-1/5 of the pipe diameter of the main insertion pipe body 1, and other reasonable proportions are also possible.
The pressure gauge 6 may be a mechanical pressure gauge structure, and the vena cava pressure can be conveniently observed through the offset of the pointer, although other electronic structures may be used for the pressure gauge 6, so long as the functions thereof can be realized.
Taking inferior vena cava drainage as an example, after the extracorporeal circulation is established during operation, the pressure measuring tube body 4 is also placed into the inferior vena cava along with the main cannula body 1, the communication hole 5 at the inner end of the pressure measuring tube body 4 is communicated with the inferior vena cava, the outer end of the pressure measuring tube body 4 is connected with the pressure measuring device 6 at the moment, and the inferior vena cava pressure can be measured in real time through the connection of the pressure measuring device 6, so that the pressure of the inferior vena cava can be monitored in real time during operation, medical staff can intuitively know the drainage condition of the inferior vena cava cannula, the cannula position can be adjusted in time, liver, kidney, stomach and intestine blood stasis caused by the blood stasis of the inferior vena cava of a patient is avoided, and the recovery of liver, kidney and stomach functions of the patient after operation is facilitated.
In this embodiment, the system further comprises a selection tee 9; the first interface of the selection tee 9 is connected with the outer end of the pressure measuring tube body 4, the second interface of the selection tee 9 is connected with the pressure measuring device 6, and the third interface of the selection tee 9 is connected with a drug feeder 10. Three interfaces of the selection tee 9 are all provided with valves, and selective communication can be realized through opening and closing of corresponding valves; the second port is dedicated for use in pressure measurement and the third port is dedicated for administration, and the applicator 10 may be, for example, a syringe or other device.
In this embodiment, the pressure gauge 6 is a pressure sensor structure, a signal output end of the pressure gauge 6 is connected with a processor 11, a signal output end of the processor 11 is connected with a display 12, and the display 12 is used for displaying pressure information measured by the pressure gauge 6 in real time. Through the communicating effect of pressure measurement body 4, the pressure in the vena cava can be responded to the probe of pressure measurement ware 6 to convert into pressure signal and transmit to treater 11, treater 11 is with the signal transmission after converting to display 12 shows, thereby is convenient for medical staff looks over. The processor 11 can be an existing singlechip structure; the load cell 6, the processor 11 and the display 12 may be integrally mounted to the same housing.
In this embodiment, the signal output end of the processor 11 is further connected with an alarm 13, and the alarm 13 is configured to send an alarm prompt when the pressure value measured in real time by the pressure measuring device 6 is abnormal. The alarm 13 can be an audible and visual alarm structure, and sends out an alarm prompt through an audible and visual signal so as to warn medical staff to pay attention to abnormal conditions; in general, an abnormality is considered when the pressure value differs from the normal value by ten mmhg, and this threshold value may be set in the processor 11.
In this embodiment, a via hole 7 is formed on the side wall of the external end (the portion that is placed outside the vena cava during operation) of the main cannula body 1, and the pressure measuring tube body 4 penetrates into the main cannula body 1 through the via hole 7; the pressure measuring tube body 4 is inserted from the side edge of the main insertion tube body 1, so that interference with the external circulation machine 8 can be avoided; the shape and size of the through hole 7 are suitable for the pressure measuring tube body 4 to pass through, and can keep certain tightness to prevent the occurrence of blood leakage accidents.
Preferably, a sealing collar 7 made of flexible material can be arranged at the position of the through hole 7, the outer side wall of the sealing collar 7 is clung to the wall of the through hole 7, and the inner side wall of the sealing collar 7 is clung to the outer pipe wall of the pressure measuring pipe body 4; the sealing collar 7 may be made of, for example, silicone; the sealing performance of the connection between the main cannula body 1 and the pressure measuring tube body 4 can be improved through the arrangement of the sealing lantern ring 7; the longitudinal section of the sealing collar 7 may be "i" shaped, of course with a hollow channel to accommodate the pressure-measuring tube body 4.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
Claims (10)
1. The vena cava cannula assembly comprises a main cannula body (1), wherein the inner end of the main cannula body (1) is used for extending into a vena cava of a human body, and a main guide hole (2) is formed in the end part of the main cannula body; the method is characterized in that:
the assembly further comprises a pressure measuring tube body (4), the pressure measuring tube body (4) is partially placed in the main insertion tube body (1) and the inner end of the pressure measuring tube body extends to the main guide hole (2), a communication hole (5) is formed in the end part of the inner end of the pressure measuring tube body (4), and the outer end of the pressure measuring tube body (4) extends out of the main insertion tube body (1) and is used for being connected with a pressure measuring device (6).
2. A vena cava cannula assembly as in claim 1, wherein:
the side wall of the outer end of the main cannula body (1) is provided with a through hole (7), and the pressure measuring tube body (4) penetrates into the main cannula body (1) through the through hole (7).
3. A vena cava cannula assembly as in claim 2, wherein:
the sealing sleeve ring made of flexible materials is arranged at the position of the through hole (7), the outer side wall of the sealing sleeve ring is clung to the hole wall of the through hole (7), and the inner side wall of the sealing sleeve ring is clung to the outer pipe wall of the pressure measuring pipe body (4).
4. A vena cava cannula assembly as in any of claims 1-3, wherein:
the pressure measuring pipe body (4) is of a hard plastic pipe structure.
5. The vena cava drainage system comprises a main cannula body (1), wherein the inner end of the main cannula body (1) is used for extending into a human vena cava, a main guiding hole (2) is formed in the end part of the main cannula body, and the outer end of the main cannula body (1) is connected with an extracorporeal circulation machine (8); the method is characterized in that:
the system further comprises a pressure measuring tube body (4) and a pressure measuring device (6) for measuring the vena cava pressure, wherein the pressure measuring tube body (4) is partially placed in the main cannula body (1) and the inner end of the pressure measuring tube body extends to the main guide hole (2), a communication hole (5) is formed in the end part of the inner end of the pressure measuring tube body (4), and the outer end of the pressure measuring tube body (4) extends out of the main cannula body (1) and is connected with the pressure measuring device (6).
6. A vena cava drainage system as in claim 5, wherein:
the system also comprises a selection tee (9); the first interface of the selection tee (9) is connected with the outer end of the pressure measuring tube body (4), the second interface of the selection tee (9) is connected with the pressure measuring device (6), and the third interface of the selection tee (9) is connected with a drug feeder (10).
7. A vena cava drainage system as in claim 5, wherein:
the pressure measuring device is characterized in that the pressure measuring device (6) is of a pressure sensor structure, a signal output end of the pressure measuring device (6) is connected with a processor (11), a signal output end of the processor (11) is connected with a display (12), and the display (12) is used for displaying pressure information measured by the pressure measuring device (6) in real time.
8. A vena cava drainage system as in claim 7, wherein:
the signal output end of the processor (11) is also connected with an alarm (13), and the alarm (13) is used for giving an alarm prompt when the pressure value measured in real time by the pressure measuring device (6) is abnormal.
9. A vena cava drainage system as claimed in any of claims 5 to 8, wherein:
the side wall of the outer end of the main cannula body (1) is provided with a through hole (7), and the pressure measuring tube body (4) penetrates into the main cannula body (1) through the through hole (7).
10. A vena cava drainage system as in claim 9, wherein:
the sealing sleeve ring made of flexible materials is arranged at the position of the through hole (7), the outer side wall of the sealing sleeve ring is clung to the hole wall of the through hole (7), and the inner side wall of the sealing sleeve ring is clung to the outer pipe wall of the pressure measuring pipe body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222971744.0U CN219270896U (en) | 2022-11-08 | 2022-11-08 | Vena cava cannula assembly and vena cava drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222971744.0U CN219270896U (en) | 2022-11-08 | 2022-11-08 | Vena cava cannula assembly and vena cava drainage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219270896U true CN219270896U (en) | 2023-06-30 |
Family
ID=86912501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222971744.0U Active CN219270896U (en) | 2022-11-08 | 2022-11-08 | Vena cava cannula assembly and vena cava drainage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219270896U (en) |
-
2022
- 2022-11-08 CN CN202222971744.0U patent/CN219270896U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4327722A (en) | Methods and apparatus for intravenous therapy and hyperalimentation | |
| US7618370B2 (en) | Venous-arterial detector and pressure indicator | |
| EP2832290A1 (en) | System and method for monitoring bladder and abdominal pressures, and bladder function recovery system | |
| CA2214701A1 (en) | Blood vessel entry indicator | |
| US5599317A (en) | Externalized sealed catheter with leakproof access | |
| CN219270896U (en) | Vena cava cannula assembly and vena cava drainage system | |
| CN213465006U (en) | Invasive blood pressure monitoring blood sampling device of dosing | |
| CN114082013A (en) | Visual drainage device | |
| CN204910455U (en) | Medical multicavity associated drainage catheter | |
| JP6853337B2 (en) | Medical technical measuring device and measuring method | |
| CN113398428A (en) | Drainage catheter capable of being dynamically monitored and monitoring method | |
| JP2013066503A (en) | Device for checking indwelling site | |
| CN210249998U (en) | Percutaneous puncture peritoneal dialysis puts pipe operation auxiliary device | |
| CN2320204Y (en) | Device for detecting intracranial pressure | |
| US20210177276A1 (en) | Device for the direct detection of the endovascular pressure of a fluid in a vessel | |
| CN205073490U (en) | Drainage tube | |
| CN217014017U (en) | Liquid storage bag with intracranial pressure monitoring function | |
| EP2301610A2 (en) | Blood vessel access instrument with vessel entry indicator | |
| CN219089518U (en) | Ureter guiding sheath | |
| CN105266792A (en) | Intra-abdominal pressure monitoring system and monitoring method thereof | |
| CN211155837U (en) | Remaining needle with blood sampling function | |
| CN213285219U (en) | PICC catheter | |
| CN217162091U (en) | Pressure detection device | |
| CN215134508U (en) | Multi-head flushing device | |
| CN219847810U (en) | Implantable infusion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |