ECMO venous catheter gas embolism prevention device

Abstract

The utility model discloses an ECMO venous indwelling tube gas embolism prevention device which comprises a negative pressure aspirator, a detachable connecting assembly is connected to a suction port of the negative pressure aspirator, and the other end of the connecting assembly is detachably connected with the end of an inner core of an ECMO venous indwelling tube cannula. The negative pressure suction device is additionally connected to the head end of the inner core before the inner core of the ECMO venous indwelling catheter cannula is withdrawn, a negative pressure state is kept when the inner core is withdrawn, rapid extraction of a venous blood flow liquid plane is facilitated, air is prevented from entering the venous indwelling catheter and a right heart system to cause aeroembolism, and meanwhile the device is easy and convenient to operate, high in safety performance and low in cost. A large amount of gas embolism complications of the right heart system can be effectively avoided, and life safety of a patient in an operation is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an ECMO venous catheterization device for preventing gas embolism. Background Art

[0002] In recent years, with the application of ECMO systemic circulation support in high-risk percutaneous coronary intervention, more and more high-risk coronary heart disease patients with extremely poor heart function have been effectively treated. However, since the inferior vena cava pressure of patients undergoing elective high-risk percutaneous coronary intervention is generally lower than that of emergency ECMO patients such as cardiogenic shock, when the guidewire and cannula are withdrawn after the femoral vein catheter is in place, due to the negative pressure caused by the rapid withdrawal speed and / or insufficient systemic circulation capacity of the patient, it is easy to cause a large amount of gas embolism in the right atrium, right ventricle and pulmonary artery, leading to serious complications such as cardiogenic shock and cardiac arrest in patients, which endangers their lives. In the past, large amounts of fluid infusion were usually used before surgery to increase the patient's circulating blood volume and central venous pressure to prevent gas embolism, but for patients with heart failure, large amounts of fluid infusion can easily lead to acute left heart failure, endangering the patient's life. Utility Model Content

[0003] In order to solve the problems in the prior art, the utility model provides an ECMO venous catheterization device for preventing gas embolism.

[0004] The technical solution of the utility model is: an ECMO venous catheterization device for preventing gas embolism, comprising a negative pressure aspirator, wherein a detachable connecting component is connected to the suction port of the negative pressure aspirator, and the other end of the connecting component is detachably connected to the inner core end of the ECMO venous catheter cannula.

[0005] As a further improvement of the above technical solution:

[0006] Preferably, the connection assembly comprises a negative pressure connection head and an inner core connection head, and the negative pressure connection head and the inner core connection head are connected via a connecting hose.

[0007] Preferably, the negative pressure connector and the inner core connector are respectively sleeved on the suction port of the negative pressure aspirator and the end of the inner core of the ECMO venous catheter cannula.

[0008] Preferably, rubber sleeves are provided on the inner walls of the negative pressure connector and the inner core connector.

[0009] Preferably, it also includes a U-shaped clamp, which is used to lock the inner core connector and the inner core of the ECMO venous catheter cannula.

[0010] Preferably, stabilizing protrusions are provided on the hose connecting ends of the negative pressure connector and the inner core connector.

[0011] Preferably, the negative pressure aspirator is a conventional syringe.

[0012] Preferably, the negative pressure aspirator is a screw-mouth syringe, and the outer side of the negative pressure connector is provided with an external thread matching the screw-mouth syringe.

[0013] Preferably, it also includes a negative pressure limiting sleeve, which is used to limit the rebound of the negative pressure suction device. At least one detachable negative pressure limiting sleeve is arranged on the negative pressure suction device.

[0014] Preferably, the negative pressure limiting sleeve is a negative pressure limiting rubber block, which is provided with a limiting groove with a diameter smaller than the width of the protrusion on the syringe pull rod, and the negative pressure limiting rubber blocks on the left and right sides of the limiting groove are provided with anti-slip deformation grooves.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model connects a negative pressure suction device to the head end of the inner core of the ECMO venous catheter before the inner core is withdrawn, and maintains a negative pressure state when the inner core is withdrawn, which is conducive to the rapid extraction of the venous blood flow liquid level and prevents air from entering the venous catheter and the right heart system to cause gas embolism. At the same time, the utility model is easy to operate and has high safety performance. It can effectively avoid a large number of gas embolism complications in the right heart system and protect the patient's life safety during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of Example 1 of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the middle A area;

[0020] Figure 3 This is a schematic diagram of the explosion structure of Example 1 of the utility model;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the negative pressure limiting rubber block of the utility model;

[0022] Figure 5 It is a schematic diagram of the overall three-dimensional explosion structure of Example 2.

[0023] Description of the drawings: 1. Negative pressure suction device; 2. Negative pressure connector; 3. Inner core connector; 4. Connecting hose; 5. Rubber sleeve; 6. U-shaped clamp; 7. Stabilizing protrusion; 8. Negative pressure limiting rubber block; 9. Limiting groove; 10. Anti-slip deformation groove; 11. Inner core of ECMO venous catheter cannula. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention. The technical solutions of the various embodiments of the present invention can be combined, and the technical features in the embodiments can also be combined to form new technical solutions.

[0026] The utility model provides the following technical solutions:

[0027] As attached Figure 1 ~Attached Figure 3 As shown, its specific structure includes three parts: 1. ECMO venous catheter cannula inner core 11; 2. negative pressure aspirator 1; 3. connecting component part.

[0028] By the attached Figure 1 It can be seen that the ECMO venous catheter cannula inner core 11 and the negative pressure suction device 1 are detachably connected through a connecting component part, wherein the connecting component part specifically includes a negative pressure connector 2 and an inner core connector 3, and the negative pressure connector 2 and the inner core connector 3 are connected through a connecting hose 4. At the same time, a rubber sleeve 5 is provided on the inner wall of the negative pressure connector 2 and the inner core connector 3. This design allows the negative pressure connector 2 and the inner core connector 3 to be sleeved on the suction port of the negative pressure suction device 1 and the end of the ECMO venous catheter cannula inner core 11, which is convenient for disassembly and installation, and increases the stability of the installation when the installation is completed.

[0029] At the same time, stabilizing protrusions 7 are provided on the hose connecting ends of the negative pressure connector 2 and the inner core connector 3, so that the connecting hose 4 will produce a certain deformation when it is sleeved on the negative pressure connector 2 and the inner core connector 3, thereby increasing the rebound force and making the connecting hose 4 more stable.

[0030] Because the negative pressure comes from the negative pressure suction device 1, the force generated on the ECMO venous catheter cannula inner core 11 is exactly opposite to the sleeve direction of the inner core connector 3, to avoid detachment during the negative pressure process. Therefore, a U-shaped clamp 6 is designed to lock the inner core connector 3 and the ECMO venous catheter cannula inner core 11. The U-shaped clamp 6 is insertable and detachable.

[0031] Example 1

[0032] As attached Figure 3 As shown, the negative pressure aspirator 1 is a conventional syringe with a cylindrical end.

[0033] Example 2

[0034] As attached Figure 5 As shown, the negative pressure suction device 1 is a screw-mouth syringe, so the outer side of the negative pressure connector 2 should be provided with an external thread matching the screw-mouth syringe for installation.

[0035] As attached Figure 4 As shown, whether it is the conventional syringe in Example 1 or the threaded syringe in Example 2, a negative pressure limiting sleeve is designed, and the negative pressure limiting sleeve is a negative pressure limiting rubber block 8. The negative pressure limiting rubber block 8 is provided with a limiting groove 9 with a diameter smaller than the width of the protrusion on the syringe pull rod, and the negative pressure limiting rubber block 8 on the left and right sides of the limiting groove is provided with anti-slip deformation grooves 10. In addition to the above-mentioned negative pressure limiting rubber block 8, different negative pressure limiting sleeves can be used to limit the rebound of the syringe as needed.

[0036] The use process of this utility model:

[0037] 1. According to the different specifications of the negative pressure aspirator 1, select a suitable negative pressure connector 2, and splice the two ends of the connecting hose 4 to the negative pressure connector 2 and the inner core connector 3 in advance.

[0038] 2. Connect one end of the negative pressure connector 2 to the negative pressure suction device 1.

[0039] 3. When it is necessary to withdraw the ECMO venous catheter cannula inner core 11, the inner core connector 3 is sleeved on the end of the ECMO venous catheter cannula inner core 11, and the two are locked by a plurality of U-shaped clamps 6.

[0040] 4. Pinch the connecting hose 4 with one hand and hold the negative pressure connector 2, and use the other hand to pull the syringe rod outward to generate negative pressure inside, and clamp the syringe rod protrusion through several negative pressure limiting sleeves. The lower end surface of the negative pressure limiting sleeve should be in contact with the syringe body to limit the syringe rod, and release the pinched connecting hose 4. This process will be faster and is suitable for quickly withdrawing the ECMO venous catheter cannula inner core 11, thereby providing a negative pressure environment to withdraw the ECMO venous catheter cannula inner core 11. Maintaining a negative pressure state when the inner core is withdrawn is beneficial to the rapid withdrawal of the venous blood flow liquid level and preventing air from entering the venous catheter and right heart system to cause air embolism.

[0041] 5. In addition to the operation method in step 4, you can also hold the inner core 11 of the ECMO venous catheter with one hand and slowly pull it outward, and control the syringe body with one hand and slowly pull the syringe rod outward. This method provides a continuous negative pressure environment.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ECMO venous catheterization device for preventing gas embolism, characterized in that: It comprises a negative pressure suction device (1), wherein a detachable connection component is connected to the suction port of the negative pressure suction device (1), and the other end of the connection component is detachably connected to the end of an ECMO venous catheter cannula inner core (11); The connection assembly comprises a negative pressure connection head (2) and an inner core connection head (3), and the negative pressure connection head (2) and the inner core connection head (3) are connected via a connection hose (4); The negative pressure connector (2) and the inner core connector (3) are respectively sleeved on the suction port of the negative pressure aspirator (1) and the end of the ECMO venous catheter cannula inner core (11).

2. The ECMO venous catheterization device for preventing gas embolism according to claim 1, characterized in that: Rubber sleeves (5) are provided on the inner walls of the negative pressure connector (2) and the inner core connector (3).

3. The ECMO venous catheterization device for preventing gas embolism according to claim 1, characterized in that: It also includes a U-shaped clamp (6), and the U-shaped clamp (6) is used to lock the inner core connector (3) and the ECMO venous catheter cannula inner core.

4. The ECMO venous catheterization device for preventing gas embolism according to claim 1, characterized in that: Both the negative pressure connector (2) and the inner core connector (3) are provided with a stabilizing protrusion (7) on their hose connection ends.

5. The ECMO venous catheterization device for preventing gas embolism according to claim 1, characterized in that: The negative pressure aspirator (1) is a conventional syringe.

6. The ECMO venous catheterization device for preventing gas embolism according to claim 1, characterized in that: The negative pressure aspirator (1) is a screw-on syringe, and the outer side of the negative pressure connector (2) is provided with an external thread matching the screw-on syringe.

7. The ECMO venous catheterization device for preventing gas embolism according to claim 5 or 6, characterized in that: It also comprises a negative pressure limiting sleeve, which is used to limit the rebound of the negative pressure suction device (1), and at least one detachable negative pressure limiting sleeve is arranged on the negative pressure suction device (1).

8. The ECMO venous catheterization device for preventing gas embolism according to claim 7, characterized in that: The negative pressure limiting sleeve is a negative pressure limiting rubber block (8), on which a limiting groove (9) having a diameter smaller than the width of the protrusion on the syringe pull rod is provided, and on the negative pressure limiting rubber block (8) on the left and right sides of the limiting groove (9) are anti-slip deformation grooves (10).

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