CN218979141U

CN218979141U - Central venous trocar

Info

Publication number: CN218979141U
Application number: CN202320118358.9U
Authority: CN
Inventors: 刘若传; 王丽杰; 韩俊
Original assignee: First Affiliated Hospital of Dalian Medical University
Current assignee: First Affiliated Hospital of Dalian Medical University
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-05-09
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses a central venous trocar, and mainly relates to the field of medical instruments. Comprises a syringe connecting block, a needle core arranged at one side of the syringe connecting block, an indwelling tube sleeved on the needle core, and a puncture sleeve sleeved at the outer side of the indwelling tube; the indwelling tube is provided with a connector at one end far away from the needle core, the connector is detachably connected with an extension tube, and the puncture sleeve is provided with a yielding gap. The indwelling tube is a silica gel hose. The outside of the puncture cannula is provided with a handle. The needle core side of connecting block is equipped with the uide bushing. The detachable connection mode comprises threads, clamping connection and insertion connection. The utility model has the beneficial effects that: the device can be used for central vein puncture, greatly simplifies the previous puncture process, reduces the puncture difficulty, thereby reducing the failure rate and the blocking probability in the puncture process, reducing the complications in the operation process due to the short operation time and low error rate, and being applicable to different patient groups.

Description

Central venous trocar

Technical Field

The utility model relates to the field of medical instruments, in particular to a central venous trocar.

Background

Central venous catheterization is the placement of a specially made catheter into the central vein, the primary central vein being the internal jugular vein, subclavian vein, and femoral vein, and commonly used from the internal jugular vein and subclavian vein, with femoral vein being used in emergency situations. The catheter is mainly placed into a central vein by a puncture method, and is mainly used for measuring central venous pressure, rapidly supplementing a large amount of liquid, injecting nutrition, injecting some stimulating drugs and the like clinically.

When the central vein catheterization puncture is performed on a patient, firstly, the internal jugular vein position is probed through ultrasonic guidance, then puncture is performed on the internal jugular vein position, a guide wire penetrates into a needle head after puncture, the puncture needle is withdrawn, the skin is expanded by a skin expander, then a catheter penetrates into a vein along the guide wire, and after the guide wire is withdrawn for examination, a tube is sealed. The above-mentioned process is complicated in steps, and the required tools are many, so that the doctor is required to have high technical ability, even the doctor with abundant experience can be failed to puncture or injure artery or other tissues by mistake, and the existing central vein catheterization sleeve is too many, so that the puncture steps are complicated, so that the optimization steps are required, and meanwhile, the operation difficulty is reduced.

Disclosure of Invention

The utility model aims to provide a central venous trocar which is used for central venous puncture, greatly simplifies the previous puncture process, reduces the puncture difficulty, reduces the failure rate and the blocking probability in the puncture process, reduces the complications in the operation process due to the short operation time and low error rate, and is also suitable for different patient groups.

The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme:

the central venous trocar comprises a syringe connecting block, a needle core arranged at one side of the syringe connecting block, an indwelling tube sleeved on the needle core, and a puncture sleeve sleeved at the outer side of the indwelling tube;

the indwelling tube is provided with a connector at one end far away from the needle core, the connector is detachably connected with an extension tube, and the puncture sleeve is provided with a yielding gap. The indwelling tube is a silica gel hose. The outside of the puncture cannula is provided with a handle. The needle core side of connecting block is equipped with the uide bushing. The detachable connection mode comprises threads, clamping connection and insertion connection. The connector is provided with a clamping block.

The diameter of the yielding gap is smaller than that of the connector.

The yielding notch is provided with a yielding groove, the yielding groove is correspondingly arranged at the connector of the indwelling tube, and the width of the yielding groove is larger than the diameter of the connector.

The diameter of the yielding gap is larger than that of the connector.

Compared with the prior art, the utility model has the beneficial effects that:

the device can be used for central vein puncture, greatly simplifies the previous puncture process, reduces the puncture difficulty, thereby reducing the failure rate and the blocking probability in the puncture process, reducing the complications in the operation process due to the short operation time and low error rate, and being applicable to different patient groups.

Drawings

FIG. 1 is a view of a first embodiment of the device of the present utility model.

Fig. 2 is a cross-sectional view of a first embodiment of the device of the present utility model.

Fig. 3 is a view and a cross-sectional view of a third embodiment of the device of the present utility model.

Fig. 4 is a view of a second embodiment of the device of the present utility model.

Fig. 5 is a view of the process of use in the present utility model.

The reference numbers shown in the drawings:

1. a syringe connecting block; 2. a needle core; 3. a retention tube; 4. a puncture cannula; 5. a connector; 6. an extension tube; 7. a relief notch; 8. a relief groove; 9. a handle; 10. a guide sleeve; 11. and a clamping block.

Detailed Description

The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes or modifications may be made by those skilled in the art after reading the teachings of the utility model, and such equivalents are intended to fall within the scope of the utility model as defined herein.

The utility model relates to a central venous trocar, which is improved because the existing venous trocar is complex, needs more tools and has complicated steps:

the main structure comprises a syringe connecting block 1, a needle core 2 arranged at one side of the syringe connecting block 1, a retention tube 3 sleeved on the needle core 2, and a puncture sleeve 4 sleeved at the outer side of the retention tube 3;

as shown in fig. 1 of the specification and drawings, one end of a connecting block 1 of the injector is connected with the injector, the purpose is to detect whether the needle core 2 enters a vein by back-drawing the injector after the needle core 2 is penetrated into the skin under the guidance of ultrasonic waves, and a guide sleeve 10 is arranged on the side of the needle core 2 of the connecting block, so that when the needle core 2 penetrates into the skin, the puncture sleeve 4 is guided when the puncture sleeve 4 is further penetrated into the skin, and thus the accuracy of puncture is improved. The outer layer of the needle core 2 is an indwelling tube 3, the indwelling tube 3 is to be indwelled in the body of a patient, and the indwelling tube 3 is a silica gel hose in order to improve the comfort of the patient and prevent the vascular access of the patient. Because the length of the indwelling tube 3 is limited, one end of the indwelling tube 3 far away from the needle core 2 is provided with a connector 5, and the connector 5 is detachably connected with an extension tube 6. The outer layer of the indwelling tube 3 is provided with a puncture sleeve 4, and the puncture sleeve 4 mainly aims to enlarge an opening on the part of the needle core 2 which is penetrated into the skin after the needle core 2 is penetrated into the skin, so that the function of the skin expander is the same as that of the existing skin expander. The puncture cannula 4 is convenient to separate and puncture the puncture cannula 4 later, and the handle 9 is arranged on the outer side of the puncture cannula 4.

Since the purpose of central venous catheterization is to put a special catheter into a central vein, the device is characterized in that the needle core 2 and the puncture cannula 4 are pulled out and the indwelling tube 3 is simultaneously placed in a patient, the connecting block and the needle core 2 are integrated with each other, so that after the needle core 2 and the puncture cannula 4 are subjected to skin-breaking puncture under the guidance of ultrasound, the needle core 2 and the connecting block can be pulled out together, the puncture cannula 4 and the indwelling tube 3 are placed in the skin together, the indwelling tube 3 is placed in the vein of the patient while the puncture cannula 4 and the indwelling tube 3 are separated, a clamping block 11 is arranged on the connecting head, so that the fixing of the connecting head and the separation of the puncture cannula 4 and the indwelling tube 3 are facilitated, and the following three modes are provided for the separation modes of the puncture cannula 4 and the indwelling tube 3, and the following structures are correspondingly provided:

first, as shown in fig. 1 and 2 of the drawings, the puncture cannula 4 is provided with a yielding gap 7, the diameter of the yielding gap 7 is smaller than that of the connector 5, and when the puncture cannula 4 and the indwelling tube 3 are separated, the clamping block 11 needs to be clamped by forceps and the connector 5 is fixed, so that the puncture cannula 4 is pulled out from the skin, and the indwelling tube 3 is still left in the patient. In this method, since the connector 5 cannot be separated from the puncture cannula 4, it can only be separated from the bottom of the puncture cannula 4, and thus the diameter of the puncture cannula 4 is larger than that of the other two methods, but this method is suitable for patients with high body fat rate, and a large indwelling port needs to be punctured.

The second is as shown in figure 4 of the specification, the diameter of the abdication notch 7 is larger than that of the connector 5, the connector 5 is clamped and fixed from the abdication notch 7 by directly clamping the clamping block 11 through forceps, and then the puncture cannula 4 is directly pulled out from the skin, so that the indwelling tube 3 still stays in the patient. For this method, which is suitable for normal patients, the diameter of the puncture cannula 4 can be further reduced compared to the first method.

Third, as shown in fig. 2 of the drawings, for the third, the relief notch 7 is provided with a relief groove 8, and the relief groove 8 is correspondingly disposed at the position of the connector 5 of the indwelling tube 3. The connector 5 is clamped and fixed from the abdication groove 8 by clamping the clamping block 11 by forceps, and the indwelling tube 3 passes through the abdication notch 7 when the puncture cannula 4 is pulled out from the skin. With this method, the diameter of the puncture cannula 4 can be further reduced, because the size of the inner diameter of the puncture cannula 4 is not affected by the size of the connector 5 of the indwelling tube 3, thereby reducing the damage surface of the puncture, and being suitable for infants and children patients.

The three modes are all carried out after the needle core 2 is pulled out from the skin of a patient, after the puncture sleeve 4 is pulled out, the extension tube 6 is connected with the connector 5 of the indwelling tube 3, and the detachable connection modes comprise threads, clamping connection and insertion connection. The above connection modes are all conventional connection modes, but the air tightness after connection needs to be noted, a sealing gasket can be added, and the main utility model is not described in detail here.

The use method is as follows:

as shown in figure 5 of the specification, the needle core 2 is penetrated into a vein of a patient under the guidance of ultrasonic waves, the syringe is connected for blood return examination, the puncture sleeve 4 is further penetrated into the vein through the handle 9 after no error, then the needle core 2 is withdrawn from the vein, the connector 5 of the indwelling tube 3 is fixed, the puncture sleeve 4 is withdrawn from the blood vessel of the patient, and the extension catheter is connected with the connector 5.

In conclusion, the device can be used for central vein puncture, greatly simplifies the previous puncture process, reduces the puncture difficulty, reduces the failure rate and the blocking probability in the puncture process, reduces the complications in the operation process due to the short operation time and low error rate, and can be applied to different patient groups.

Claims

1. A central venous trocar, characterized by: comprises a syringe connecting block (1), a needle core (2) arranged at one side of the syringe connecting block (1), an indwelling tube (3) sleeved on the needle core (2), and a puncture sleeve (4) sleeved at the outer side of the indwelling tube (3);

the utility model discloses a puncture cannula, including keep somewhere tube (3), needle core (2) one end is kept away from, is equipped with connector (5), connector (5) detachable connection is equipped with extension tube (6), puncture cannula (4) are equipped with breach of stepping down (7).

2. A central venous trocar as claimed in claim 1, wherein: the diameter of the yielding gap (7) is smaller than that of the connector (5).

3. A central venous trocar as claimed in claim 2, wherein: the yielding notch (7) is provided with a yielding groove (8), the yielding groove (8) is correspondingly arranged at the connector (5) of the indwelling tube (3), and the width of the yielding groove (8) is larger than the diameter of the connector (5).

4. A central venous trocar as claimed in claim 1, wherein: the diameter of the yielding gap (7) is larger than that of the connector (5).

5. A central venous trocar as claimed in any one of claims 1 to 4, characterised in that: the outside of the puncture cannula (4) is provided with a handle (9).

6. A central venous trocar as claimed in claim 5, wherein: the detachable connection comprises threads, clamping connection and plugging connection.

7. A central venous trocar as claimed in claim 6, wherein: the indwelling tube (3) is a silica gel hose.

8. A central venous trocar as claimed in claim 7, characterized in that: the guide sleeve (10) is arranged on the side of the needle core (2) of the connecting block.

9. A central venous trocar as claimed in claim 8, wherein: the connecting head is provided with a clamping block (11).