CN209884279U

CN209884279U - Central venous catheter puncture needle

Info

Publication number: CN209884279U
Application number: CN201920484890.6U
Authority: CN
Inventors: 熊道学; 王玲; 姜建渝; 张小蓉; 冯琰; 贺祯雅
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-01-03
Anticipated expiration: 2029-04-11

Abstract

The utility model relates to a puncture needle for central vein catheterization. Aiming at the problems that the conventional puncture needle is easy to cause blood backflow, and the hard puncture needle structure is easy to cause difficulty in placing a guide wire, the risk of puncture complications such as local hematoma is obviously increased. The utility model is provided with an anti-reflux valve on the inner wall of the puncture needle cannula seat. A cross-shaped linear slit is left in the middle of the valve. The structure can solve the problems of blood backflow and potential air embolism when the central vein is punctured and the guide wire is fed; meanwhile, the trocar is arranged, so that the one-time success rate of guide wire feeding can be greatly improved, and puncture complications are reduced.

Description

Central venous catheter puncture needle

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a central venous catheter pjncture needle.

Background

The central vein catheterization technology is widely applied to the medical clinical field. The current common operation method comprises the following steps: firstly, connecting a Y-shaped double-channel puncture needle with a conventional injector or connecting a single-channel puncture needle with a blue hollow injector, using the puncture needle to puncture and search a large vein, after the large vein is found, placing a guide wire along the puncture needle, then withdrawing the puncture needle, using an expander to expand the skin, then sleeving a catheter on the guide wire, sending the catheter into the large vein along the guide wire, removing the guide wire, and fixing the catheter, thus completing catheterization.

In the puncturing process, the hard puncturing needle is connected with the injector, so that the whole device is long, a large operation interface is required, and the force is hard to apply and the puncturing direction is difficult to control during puncturing. Especially children are influenced by physiological factors such as small size, big head, big tongue, short neck, thin shoulder and back and the like, and the one-time success rate of central venous catheterization is greatly limited. On the other hand, even though the blood returns smoothly after the puncture needle head enters the great vein, if the position of the puncture needle tip is slightly insufficient, the puncture needle does not completely enter a blood vessel cavity, or the position of the puncture needle tip is slightly over, the puncture needle head can penetrate through the blood vessel wall and forms an angle with the blood vessel, so that the guide wire is difficult to place, even is twisted and deformed. The puncture complications such as local hematoma can be obviously increased by repeatedly adjusting the position.

If the soft sleeve can be placed before the guide wire is placed, the soft sleeve is completely sent into the blood vessel, the plasticity is large, the sharp end is not easy to form a bevel, the success rate of one-time sending of the guide wire can be greatly improved, and puncture complications are reduced. Corresponding trocars are arranged in part of the existing central venous catheter packages, but the existing trocars are not provided with anti-reflux devices, so that a puncture person sees blood return, blood leakage can occur when retracting a hard needle tube and placing a guide wire, and infection is easily caused; meanwhile, because the pressure of the central vein is low, air is easy to enter when the needle tube is retracted and the guide wire is placed, and the risk of air embolism exists.

Disclosure of Invention

The utility model provides a central venous catheter pjncture needle to prior art's not enough, can improve the disposable success rate of central vein catheterization, reduce puncture complications such as blood leakage, air embolism, local hematoma.

In order to achieve the above object, the utility model provides a central vein puncture needle contains the tail plug, returns blood groove, needle tube seat, needle tubing, casing seat, sleeve pipe and sets firmly the valve on the casing seat inner wall, the valve that sets firmly on the casing seat inner wall, with axle perpendicular in the casing seat, the whole circular structure that is of valve, the middle cross threadiness of staying cracks.

For better effect: the tail end of the cannula base and the tail end of the needle tube base can be matched with the nipple of the injector and can be connected with the injector.

The length and the inner diameter of the needle tube and the sleeve are matched with the model of the central venous catheter.

The utility model discloses during the operation, look for the great vein with the pjncture needle earlier, see back the blood and stop the needle insertion, send into the great vein with soft sleeve pipe along the acupuncture direction, then withdraw from the puncture hard needle of the inside, put into the seal wire from soft sleeve pipe, expand the skin with the expander, again with the pipe box on the seal wire, send into the great vein with the pipe along the seal wire, pull out the seal wire, fixed pipe accomplishes promptly and puts the pipe.

The valve in the casing seat is of a circular structure as a whole, a cross-shaped linear seam is reserved in the middle, and the edge of the valve is integrated with the casing seat in a welding mode. The valve is perpendicular with the interior axle of the casing seat and tightly attached to the inner wall of the casing seat, and the device has the advantages that: the needle tube passes through the center of the valve slit before puncture. After puncture is finished and the needle tube is pulled out, blood in the body flows back due to the action of pressure in veins, and the valve structure is automatically closed under the pressure of the returned blood to prevent the blood from flowing back and air from entering; the tail part of the cannula seat is connected with an injector, and the central cross-shaped linear slit of the valve can be opened by utilizing the back-pumping negative pressure to check the conditions of blood return and unobstructed cannula. Meanwhile, in the puncture process, in order to avoid the condition that the visible blood return rate is low due to low pressure of the central vein, the tail plug of the needle tube seat can be taken down and connected with the injector, and a mode of keeping mild negative pressure while inserting the needle and drawing back is adopted to improve the blood return rate. In addition, the embedded soft sleeve is completely sent into the blood vessel, the plasticity is large, the tip is not easy to form a bevel, the success rate of one-time sending of the guide wire can be greatly improved, and puncture complications are reduced.

The design of arranging the valve in the casing seat can effectively prevent the backflow of blood and the entrance of air when the needle tube is pulled out and the guide wire is sent in, and reduce the risk of blood leakage, air embolism and infection; after the soft sleeve is placed, the guide wire is guided to be placed, so that the success rate of disposable puncture of the central vein can be greatly improved, and puncture complications such as blood leakage, air embolism, local hematoma and the like can be reduced.

Drawings

The present invention will be further explained with reference to the accompanying drawings and embodiments:

FIG. 1 is a front view of the central venipuncture needle of the present invention;

FIG. 2 is an axial view of the valve in the cannula holder;

FIG. 3 is a schematic view showing the process of delivering a guidewire through an insertion cannula;

FIG. 4 is a schematic diagram of the puncture with the tail plug removed and the needle tube base connected to the injector;

FIG. 5 is a schematic view showing that after the puncture is completed and the needle tube is removed, the tail end of the cannula holder is connected with the injector, and the blood return of the cannula is checked.

Wherein: 1. a needle tube; 2. a sleeve; 3. a cannula holder; 4. a valve arranged on the inner wall of the cannula seat; 5. a needle tube base; 6. a blood return groove 7 and a tail plug; 8. an injector; 9. a guide wire; 10. a guide wire booster.

The specific implementation mode is as follows:

example one

As shown in figure 1, figure 2 and figure 3, in the puncture needle casing seat 3 of the utility model, the designed valve 4 is circular and vertical to the inner shaft of the casing seat 3, and is tightly attached to the inner wall of the casing seat 3, a cross-shaped linear slot is left in the middle, and the needle tube passes through the center of the slot of the valve 4 before puncture. Firstly, a puncture needle is used for searching a large vein, when blood return is seen, needle insertion is stopped, the soft sleeve 2 is sent into the large vein along the needling direction, the hard needle tube 1 is withdrawn, then the guide wire 9 is sent from the soft sleeve 2 by using the guide wire booster 10, the sleeve 2 is withdrawn, the skin is expanded by using the dilator, the guide wire 9 is sleeved with the catheter, the catheter is sent into the large vein along the guide wire 9, the guide wire 9 is pulled out, and the catheter is fixed, thus completing catheterization. Due to the arrangement of the soft sleeve 2, the success rate of one-time feeding can be greatly improved; meanwhile, due to the sealing effect of the valve 4, the risks of blood backflow and air embolism in the process of feeding the guide wire 9 can be greatly reduced.

Example two

As shown in FIG. 4, in the puncturing procedure of the first embodiment, the tail plug 7 can be removed, the needle holder 5 can be connected with the syringe 8, and the blood returning rate of the blood returning groove 6 can be increased by keeping a slight negative pressure while inserting the needle and withdrawing the needle.

EXAMPLE III

As shown in fig. 5, after the puncture is completed and the needle tube 1 is withdrawn in the first embodiment, the tail part of the cannula holder 3 can be connected with the injector 8, and the central cross-shaped linear slit of the valve 4 is opened by using the back-pumping negative pressure to check the blood return and the unobstructed condition of the cannula.

Claims

1. The utility model provides a central venous catheter pjncture needle, includes tail stopper (7), returns blood vessel (6), needle tubing seat (5), needle tubing (1), casing seat (3), sleeve pipe (2) and sets firmly valve (4) on the casing seat inner wall, its characterized in that: the valve (4) fixedly arranged on the inner wall of the casing seat (3) is vertical to the inner shaft of the casing seat (3), the whole valve (4) is of a circular structure, and a cross-shaped linear slit is reserved in the middle.

2. A central venous catheter access needle as defined in claim 1 wherein: the tail end of the cannula base (3) and the tail end of the needle tube base (5) can be matched with the nipple of the injector and can be connected with the injector.

3. A central venous catheter access needle as defined in claim 1 wherein: the length and the inner diameter of the needle tube (1) and the sleeve (2) are matched with the model of the central venous catheter.