CN209107525U - A new type of sacral puncture needle - Google Patents

Abstract

The utility model provides a novel sacral canal puncture needle, comprising an outer needle handle, an outer needle tube, an inner needle handle, an inner needle tube, an extension hose, an outer sleeve and a spring. An annular protrusion is arranged on the outer wall; the needle tip of the outer needle tube is blunt; the front end of the inner needle handle is integrally connected and communicated with the inner needle tube; the front end of the inner needle tube is inserted into the outer needle tube from the tail end of the outer needle handle, and the needle tip of the inner needle tube is sharp. One end of the extension hose is connected to and communicated with the tail end of the inner needle handle, and the other end constitutes a syringe connector; the outer sleeve is a concentric cylinder arranged outside the inner needle tube; the tail end of the outer needle handle just extends into the space between the outer sleeve and the inner needle handle The annular cavity formed between them can slide in the annular cavity; an annular plug is arranged at the head end of the outer sleeve; the spring is located in the outer needle handle and sleeved at the tail end of the inner needle tube. The utility model has the advantages of simple structure, convenient operation, good sense of hierarchy and breakthrough during operation and use, and will not accidentally puncture the dural sac or puncture the blood vessel.

Description

A new type of sacral puncture needle

technical field

The utility model relates to the field of medical instruments, in particular to a novel sacral canal puncture needle.

Background technique

In sacral block anesthesia and sacral puncture treatment, doctors usually use 6#, 7# common injection needles or peripheral intravenous infusion needles to connect with a syringe filled with medicinal solution when performing sacral puncture. The following shortcomings: First of all, the needle tip of the injection needle used clinically is very sharp, which is very good for injection or infusion. When used for sacral canal puncture and nerve block, due to anatomical differences, it is easy to accidentally puncture the dural sac or puncture the blood vessel. And the sense of layering and resistance breakthrough in the puncture is slightly worse. Secondly, a common injection needle is used to connect a syringe for sacral puncture. During the observation time after bolus injection of the test dose, the needle is not easy to be fixed and easily displaced, which may pierce the dural sac or puncture the blood vessel, resulting in the possibility of accidents.

Utility model content

In view of the above problems, the purpose of the present utility model is to provide a novel sacral sac with simple structure, convenient operation, good sense of hierarchy and breakthrough during operation and use, and will not accidentally puncture the dural sac or puncture the blood vessel. Tube puncture needle. The specific technical solutions are as follows:

A new type of sacral canal puncture needle, comprising an outer needle handle, an outer needle tube, an inner needle handle, an inner needle tube, an extension hose, an outer sleeve, and a spring, the outer needle handle is a hollow cylinder structure, and its front end is integrally connected with the outer needle tube The outer wall of the tail end is provided with an annular protrusion; the needle tip of the outer needle tube is a blunt tip; the inner needle handle is a hollow cylinder structure and is located in the outer needle handle, and its front end is integrally connected and communicated with the inner needle tube; the The front end of the inner needle tube is inserted into the outer needle tube by the tail end of the outer needle handle and can extend out of the head end of the outer needle tube, and the needle tip of the inner needle tube is a sharp tip; Syringe connector; the outer sleeve is a concentric cylinder arranged outside the inner needle tube with an open head end and a closed tail end; the tail end of the outer needle handle just protrudes into the annular cavity formed between the outer sleeve and the inner needle handle and can be placed therein sliding; the head end of the outer sleeve is provided with an annular plug for preventing the annular protrusion on the outer needle handle from coming out of the annular cavity; the spring is located in the outer needle handle and sleeved at the tail end of the inner needle pipe.

Further, the annular protrusion is in clearance fit with the inner wall of the outer sleeve.

Further, the diameter of the spring is smaller than the diameter of the inner needle handle.

Further, the outer sleeve and the inner needle handle are integrally arranged.

Further, the annular plug is threadedly connected to the head end of the outer casing.

Further, in order to prevent liquid leakage, a sealing ring is also provided inside the outer needle handle, and the sealing ring is sleeved at the end of the inner needle tube and located between the spring and the front end of the outer needle handle.

Further, the sealing ring is fixed on the inner wall of the front end of the outer needle handle.

Further, the sealing ring is an elastic rubber ring.

The beneficial effect of the utility model is that the structure is simple, the operation is convenient, a good sense of hierarchy and breakthrough can be obtained during operation and use, and the dural sac will not be accidentally punctured or the blood vessel will be punctured.

Description of drawings

Fig. 1 is the structural representation of a new type of sacral canal puncture needle of the utility model in a natural state;

Fig. 2 is a structural schematic diagram of a novel sacral canal puncture needle of the utility model under the puncture state;

As shown in the picture: 1-outer needle handle, 2-outer needle tube, 3-inner needle tube, 4-annular protrusion, 5-inner needle handle, 6-annular cavity, 7-extension hose, 8-syringe connector, 9 - Outer casing, 10-ring plug, 11-spring, 12-sealing ring.

Detailed ways

The principles and features of the present utility model are further described in detail below with reference to the accompanying drawings. The examples are only used to explain the utility model, and are not intended to limit the scope of the present utility model.

As shown in Figures 1 and 2, a novel caudal puncture needle of the present invention includes an outer needle handle 1, an outer needle tube 2, an inner needle handle 5, an inner needle tube 3, an extension hose 7, an outer sleeve 9, a spring 11. The outer needle handle 1 is a hollow cylinder structure, the front end of which is integrally connected and communicated with the outer needle tube 2, and an annular protrusion 4 is provided on the outer wall of the tail end; the needle tip of the outer needle tube 2 is a blunt tip; the inner needle handle 5 is a hollow cylinder structure and is located in the outer needle handle 1, and its front end is integrally connected and communicated with the inner needle tube 3; The head end, the needle tip of the inner needle tube 3 is a sharp head; one end of the extension hose 7 is connected to the tail end of the inner needle handle 5 and communicates with it, and the other end constitutes a syringe connector 8; the outer sleeve 9 is arranged outside the inner needle tube 5. And a concentric cylinder with an open end and a closed end; the end of the outer needle handle 1 just extends into the annular cavity 6 formed between the outer sleeve 9 and the inner needle handle 5 and can slide in it; There is an annular plug 10 for preventing the annular protrusion 4 on the outer needle handle 1 from coming out of the annular cavity 6 ; the spring 11 is located in the outer needle handle 1 and sleeved on the end of the inner needle tube 3 .

Further, the annular protrusion 4 is in clearance fit with the inner wall of the outer sleeve 9 .

Further, the diameter of the spring 11 is smaller than the diameter of the inner needle handle 5 .

Further, the outer sleeve 9 and the inner needle handle 5 are integrally provided.

Further, the annular plug 10 is threadedly connected to the head end of the outer sleeve 9 .

Further, in order to prevent liquid leakage, a sealing ring 12 is also provided inside the outer needle handle 1 .

Further, the sealing ring 12 is fixed on the inner wall of the front end of the outer needle handle 1 .

Further, the sealing ring 12 is an elastic rubber ring.

During operation, use the fingers of one hand to buckle the tail end of the outer sleeve 9 and the head end of the outer needle handle 1 respectively, and close the two inwards, so that the tail end of the outer needle handle 1 slides into the annular cavity 6, and the inner needle tube 3 The needle point of the needle sticks out from the needle point of the outer needle tube 2, and the puncture operation can be performed. During puncture, the finger presses the tail end of the outer cannula 9 and the head end of the outer needle handle 1 and does not loosen it. After puncturing the skin with the needle tip of the inner needle tube 3, fasten the tail end of the outer cannula 9 and the head end of the outer needle handle 1 and loosen the fingers. Open, the outer needle handle 1 is reset under the action of the spring 11, and the needle tip of the inner needle tube 3 is retracted into the outer needle tube 2. Continuing to puncture with the outer needle tube 2 can obtain a good sense of hierarchy and breakthrough. The blunt tip design prevents accidental puncture of the dural sac or puncture of blood vessels.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (8)

1. a novel sacral canal puncture needle, characterized in that: it comprises an outer needle handle, an outer needle tube, an inner needle handle, an inner needle tube, an extension hose, an outer sleeve, and a spring, and the front end of the outer needle handle is integrally connected with the outer needle tube. The outer wall of the tail end is provided with an annular protrusion; the needle tip of the outer needle tube is a blunt tip; the inner needle handle is located in the outer needle handle and its front end is integrally connected and communicated with the inner needle tube; the front end of the inner needle tube is connected by the outer needle The tail end of the handle is inserted into the outer needle tube and can extend out of the head end of the outer needle tube, and the needle tip of the inner needle tube is a sharp tip; one end of the extension hose is connected to the tail end of the inner needle handle and communicated with it, and the other end constitutes a syringe joint; the outer sleeve It is a concentric cylinder set outside the inner needle tube with an open head and a closed tail; the tail end of the outer needle handle just extends into the annular cavity formed between the outer sleeve and the inner needle handle and can slide in it; An annular plug is provided for preventing the annular protrusion on the outer needle handle from coming out of the annular cavity; the spring is located in the outer needle handle and sleeved on the tail end of the inner needle tube. 2. The novel sacral canal puncture needle according to claim 1, characterized in that: the annular protrusion is matched with the inner wall of the outer cannula in a gap. 3. The novel sacral canal puncture needle according to claim 1, wherein the diameter of the spring is smaller than the diameter of the inner needle handle. 4. The novel sacral canal puncture needle according to claim 1, wherein the outer cannula and the inner needle handle are integrally provided. 5. The novel sacral canal puncture needle according to claim 1, wherein: the annular plug is threadedly connected to the head end of the outer casing. 6. The novel sacral canal puncture needle according to any one of claims 1 to 5, characterized in that: a sealing ring is also provided inside the outer needle handle, and the sealing ring is sleeved on the tail end of the inner needle tube and is located between the spring and the outer needle. between the front ends of the needle handles. 7. The novel sacral canal puncture needle according to claim 6, wherein the sealing ring is fixed on the inner wall of the front end of the outer needle handle. 8. The novel sacral canal puncture needle according to claim 7, wherein the sealing ring is an elastic rubber ring.