CN209173055U - A piercable hemodialysis catheter - Google Patents

Abstract

The utility model belongs to the field of medical instrument technology, discloses a kind of hemodialysis catheter that can be punctured, is provided with puncture needle；Puncture needle tail end has been connected through a screw thread conduit, integrated molding has multiple protrusions on the outside of puncture needle and catheter proximal end, being glued on the outside of conduit has air bag, conduit is divided into blood vessel out on rear side of air bag and into blood vessel, out blood vessel and connector is all socketed with into blood vessel tail end, it is connected with newel inside connector, the knob in newel and outside is cementing, and newel center offers through-hole.The utility model is provided with protrusion, and vascular wall can be prevented too tight, so that the through-hole on the outside of puncture needle and conduit blocks, influences to dialyse, and puncture needle tail end is connect by screw thread with conduit, can split placement, and storage is convenient；It is provided with air bag, buffer function can be played when being punctured, prevents piercing too deep, conduit, which is pierced into rear gasbag, may also function as the protective effect to wound, prevent infected wound.

Description

A piercable hemodialysis catheter

technical field

The utility model belongs to the technical field of medical instruments, in particular to a punctureable hemodialysis catheter.

Background technique

At present, the existing technologies commonly used in the industry are as follows:

Blood purification technology refers to the general term for various methods of continuously or intermittently removing excess water and solutes in the body. In daily life, we often call it hemodialysis. Blood purification methods include renal replacement therapy, hemoperfusion, immunoadsorption, endotoxin adsorption, and plasma exchange. Each blood purification method has its own characteristics, and each is applicable to different diseases or different disease states. But no matter what type of blood purification, it is necessary to establish an effective venous access, also known as blood access, from the arterial end to draw the blood in the patient's body, after extracorporeal purification, and then enter the human body through the venous end. Therefore, establishing an effective and unobstructed blood access is the basic condition for realizing blood purification.

Hemodialysis is one of the renal replacement therapies for patients with acute and chronic renal failure. It drains the blood from the body to the outside of the body through a dialyzer composed of countless hollow fibers. The blood and the electrolyte solution (dialysate) with a similar concentration to the body are exchanged through diffusion/convection inside and outside the hollow fibers. , remove metabolic waste from the body, maintain electrolyte and acid-base balance; remove excess water from the body at the same time, and return the purified blood to the whole process called hemodialysis. When the existing hemodialysis catheter is punctured into the patient's body, there is no blocking device on the outside of the catheter, so it is not easy to grasp the puncture depth. If it is too shallow, it will affect the dialysis effect. If it is too deep, it will increase the pain of the patient and reduce the work efficiency of the doctor. , and the closure of the existing catheter is controlled by the kneading buckle. After the buckle is fixed, the inner side edges of the catheter cannot be fixed too tightly, which will easily lead to bacteria entering and polluting the inside of the catheter.

In summary, the problems in the prior art are:

(1) There is no blocking device on the outside of the existing hemodialysis catheter, and it is not easy to grasp the puncture depth;

(2) When the existing catheter switch control buckle is used, the inner side edges of the catheter cannot be fixed too tightly, which may easily cause bacteria to enter and pollute the inside of the catheter.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the utility model provides a punctureable hemodialysis catheter.

The utility model is achieved in that a punctureable hemodialysis catheter is provided with a puncture needle;

The tail end of the puncture needle is connected with a catheter through threads, and the outside of the front end of the puncture needle and the catheter is integrally formed with multiple protrusions. The outside of the catheter is glued with a balloon, and the catheter is divided into an outlet vessel and an inlet vessel at the back of the balloon. The tail ends are all socketed with connectors.

The utility model is provided with a protrusion, which can prevent the blood vessel wall from being too tight, so that the through hole on the outside of the puncture needle and the catheter is blocked, which affects dialysis. The tail end of the puncture needle is connected with the catheter through threads, which can be disassembled and placed, and is convenient for storage; it is provided with an airbag , can play a cushioning role during puncture to prevent too deep penetration, and the airbag can also protect the wound after the catheter is inserted to prevent wound infection.

Further, a central column is clamped inside the connector, the central column is cemented with the outer knob, and a through hole is opened in the center of the central column.

The connection head of the utility model adopts a rotary connection method, which can effectively prevent bacteria from entering and prevent accidental touch from causing the buckle to bounce off compared with the traditional kneading buckle, which has high safety.

Further, both sides of the outflow vessel and the inflow vessel are pasted with fixation stickers.

The utility model separates and fixes the outlet blood vessel and the inlet blood vessel, and the fixation is firm, preventing that when one side is loosened and the other side is driven, the other side cannot be fixed at the same time.

Further, the tip of the puncture needle is a round blunt tip.

The utility model can prevent the blood vessel wall from being punctured in the puncturing process through the puncture needle with a round blunt tip, thereby reducing the occurrence of accidents.

Description of drawings

Fig. 1 is a schematic structural view of a pierceable hemodialysis catheter provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the connector structure provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the puncture needle provided by the embodiment of the present invention;

In the figure: 1. Puncture needle; 2. Catheter; 3. Balloon; 4. Outlet blood vessel; 5. Inlet blood vessel; 6. Fixed sticker; 7. Connector; 8. Protrusion; 11. Through hole.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are given below in conjunction with the accompanying drawings.

Below in conjunction with accompanying drawing, the structure of the present utility model is described in detail.

As shown in Figures 1 to 3, the punctureable hemodialysis catheter provided by the embodiment of the present invention includes: a puncture needle 1, a catheter 2, a balloon 3, an outlet vessel 4, an inlet vessel 5, a fixing sticker 6, a connector 7, Protrusion 8, knob 9, center column 10, through hole 11.

The tail end of the puncture needle 1 is connected with the catheter 2 through threads, and the outside of the front end of the puncture needle 1 and the catheter 2 are integrally formed with a plurality of protrusions 8 , the outer side of the catheter 2 is glued with the balloon 3 , and the catheter 2 is divided into a blood vessel at the back of the balloon 3 4 and the inlet blood vessel 5, the tail ends of the outlet blood vessel 4 and the inlet blood vessel 5 are all sleeved with connectors 7.

As a preferred embodiment, a central column 10 is fastened inside the connecting head 7 , and the central column 10 is cemented with the outer knob 9 , and a through hole 11 is opened in the center of the central column 10 .

As a preferred embodiment, both sides of the outlet blood vessel 4 and the inlet blood vessel 5 are pasted with fixing stickers 6 .

As a preferred embodiment, the tip of the puncture needle 1 is a round blunt tip.

When in use, the puncture needle 1 is fixed to the head end of the catheter 2 by threads, and the catheter 2 is brought into the body through the puncture needle 1, and the position of the punctured balloon 3 shall prevail. Separately fix the inlet blood vessel 5 and the outlet blood vessel 4 on the surface of the skin, connect the external device through the connector 7 outside the outlet blood vessel 4 to extract the blood in the body for dialysis, and connect the external device through the connector 7 outside the inlet blood vessel 5 The dialyzed blood is introduced into the catheter 2 and then introduced into the human body, and the orientation of the through hole 11 in the central column 10 is adjusted by rotating the knob 9 of the connector 7, so as to control the switch of the connector 7. When the hole 11 is rotated to communicate with the conduits on both sides, it is in an open state, and when the through hole 11 is rotated to be perpendicular to the conduits on both sides, it is in a closed state.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Any simple modifications made to the above embodiments according to the technical essence of the present utility model are equivalent to changes and modifications. All belong to the scope of the technical solution of the utility model.

Claims (4)

1. A punctureable hemodialysis catheter, characterized in that, the punctureable hemodialysis catheter is provided with a puncture needle; The tail end of the puncture needle is connected with a catheter through threads, and the outside of the front end of the puncture needle and the catheter is integrally formed with multiple protrusions. The outside of the catheter is glued with a balloon, and the catheter is divided into an outlet vessel and an inlet vessel at the back of the balloon. The tail ends are all socketed with connectors. 2 . The punctureable hemodialysis catheter according to claim 1 , wherein a central post is clamped inside the connector, the central post is glued to the outer knob, and a through hole is opened in the center of the central post. 3 . 3. The punctureable hemodialysis catheter according to claim 1, wherein both sides of the outflow vessel and the inflow vessel are pasted with fixation stickers. 4. The pierceable hemodialysis catheter according to claim 1, wherein the tip of the puncture needle is a round blunt tip.