阅读说明：本技术 植入式给药装置专用针 (Special needle for implanted drug delivery device ) 是由 荆文普 邢正伟 魏菁华 于 2019-09-26 设计创作，主要内容包括：本发明涉及一种植入式给药装置专用针,包括针管、固定在针管上的针柄、与针管连通的外延管,所述的针管固定在针柄上,且针管与外延管其中一端接通,所述的针柄固定在针管与外延管的连接处；所述的针管包括横向的固定段和竖向的工作段,固定段和工作段连接形成L状的针管,针管的固定段固定在针柄上且与外延管接通,针管的工作段的下端通过弧形的过渡段平滑连接有向内弯折的穿刺段,穿刺段的自由端通过斜切面切除形成穿刺尖端及侧面开口的出液孔,穿刺针尖上斜切面与针管工作段平行,使斜切面上的后刃口近似平行的滑入穿刺口,这样后刃口对穿刺口周围不产生切削作用,避免产生被刺物的切屑进入针管内,从而避免进入相关的液体后再进入人体内。(The invention relates to a special needle for an implanted drug delivery device, which comprises a needle tube, a needle handle fixed on the needle tube and an epitaxial tube communicated with the needle tube, wherein the needle tube is fixed on the needle handle, the needle tube is communicated with one end of the epitaxial tube, and the needle handle is fixed at the joint of the needle tube and the epitaxial tube; the needle tube include horizontal fixed section and vertical working section, the fixed section is connected with the working section and is formed the needle tube of L form, the fixed section of needle tube is fixed on the needle handle and is expert with epitaxial tube, the lower extreme of the working section of needle tube passes through curved changeover portion smooth connection to the puncture section of inside buckling, the free end of puncture section passes through the scarf excision and forms puncture point and side open-ended drain hole, the scarf is parallel with needle tube working section on the puncture needle point, make the nearly parallel slip of back blade on the scarf puncture, back blade does not produce the cutting effect around the puncture like this, avoid producing the smear metal of quilt and get into in the needle tube, thereby avoid getting into the human body after the relevant liquid.)

1. The special needle of implanted drug delivery device, including the needle tubing, fix needle handle on the needle tubing, with the extension tube of needle tubing intercommunication, characterized by:

the needle tube is fixed on the needle handle, the needle tube is communicated with one end of the epitaxial tube, and the needle handle is fixed at the joint of the needle tube and the epitaxial tube;

the needle tube comprises a transverse fixing section and a vertical working section, the fixing section and the working section are connected to form an L-shaped needle tube, the fixing section of the needle tube is fixed on the needle handle and communicated with the epitaxial tube, the lower end of the working section of the needle tube is smoothly connected with a puncturing section bent inwards through an arc-shaped transition section, the free end of the puncturing section is cut off through a bevel plane to form a puncturing tip and a liquid outlet hole with an opening on the side surface, two symmetrical puncturing slopes are formed on the bevel plane of the puncturing tip through cutting, symmetrical main cutting edges and middle cutting edges are formed on two sides of the puncturing tip by the puncturing slopes, the included angle between the bevel plane and the axis of the working section of the needle tube is alpha, wherein alpha is more than or equal to 0 degree and less than or equal to 5 degrees, the included angle between the axis of the puncturing section and the axis of the working section of the needle tube is beta, and.

2. The needle special for the implantable drug delivery device according to claim 1, wherein: the axial line of the working section of the needle tube, the axial line of the fixing section of the needle tube and the axial line of the puncture section are all in the same plane.

3. The needle special for the implantable drug delivery device according to claim 1, wherein: the included angle alpha between the inclined plane and the axis of the needle tube working section is =0 deg.

4. The needle special for the implantable drug delivery device according to claim 1, wherein: the included angle beta =15 degree between the axis of the puncture section and the axis of the needle tube working section.

5. The needle special for the implantable drug delivery device according to claim 1, wherein: the included angle gamma between the fixed section of the needle tube and the working section of the needle tube is an obtuse angle.

6. The needle special for the implantable drug delivery device according to claim 1, wherein: the free end of the extension tube is provided with a connecting seat communicated with the extension tube, and the connecting seat is provided with a protective cap.

7. The needle special for the implantable drug delivery device according to claim 1, wherein: the body of the extension tube is sleeved with a catheter clip.

8. The needle special for the implantable drug delivery device according to claim 1, wherein: the needle handle is in the shape of a butterfly wing, and a through handheld hole is further formed in the needle handle.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a special needle for an implantable drug delivery device.

Background

The subcutaneous implantation type medicine feeder is one new type of medical equipment forming medicine passage inside human body, and is used for medicine feeding in implanted guide area, providing repeated passage to selected target tissue or organ, and for medicine application and other diseases treatment in cancer area chemotherapy and analgesia treatment. Compared with the conventional intravenous or intramuscular injection method, the method can improve the concentration of the liquid medicine of local tissues or organs by tens to more than one hundred times, and acts on target tissues for a long time.

The implanted medicine feeder is made of stainless steel and silicon rubber and consists of cavity, medicine feeding plug, locking sleeve, duct, etc. the implanted medicine feeder is implanted into the subcutaneous part of human body via operation, the duct is introduced into blood vessel, and the medicine liquid is injected into the cavity via puncture injection to convey the medicine liquid via the cavity and the duct to specific tissue or organ of human body to raise the medicine treating effect and reduce side effect. Therefore, there is a need to invent a needle dedicated to an implantable drug delivery device.

Disclosure of Invention

In order to solve the problems, the invention provides a special needle for an implantable drug delivery device.

The specific contents are as follows: the special needle of implanted drug delivery device, including the needle tubing, fix needle handle on the needle tubing, with the extension tube of needle tubing intercommunication, characterized by:

the needle tube is fixed on the needle handle, the needle tube is communicated with one end of the epitaxial tube, and the needle handle is fixed at the joint of the needle tube and the epitaxial tube;

the needle tube comprises a transverse fixing section and a vertical working section, the fixing section and the working section are connected to form an L-shaped needle tube, the fixing section of the needle tube is fixed on the needle handle and communicated with the epitaxial tube, the lower end of the working section of the needle tube is smoothly connected with a puncturing section bent inwards through an arc-shaped transition section, the free end of the puncturing section is cut off through a bevel plane to form a puncturing tip and a liquid outlet hole with an opening on the side surface, two symmetrical puncturing slopes are formed on the bevel plane of the puncturing tip through cutting, symmetrical main cutting edges and middle cutting edges are formed on two sides of the puncturing tip by the puncturing slopes, the included angle between the bevel plane and the axis of the working section of the needle tube is alpha, wherein alpha is more than or equal to 0 degree and less than or equal to 5 degrees, the included angle between the axis of the puncturing section and the axis of the working section of the needle tube is beta, and.

Preferably, the axis of the working section of the needle tube, the axis of the fixing section of the needle tube and the axis of the puncturing section are all in the same plane.

Preferably, the angle α =0 ° between the chamfer and the axis of the working portion of the needle cannula.

Preferably, the axis of the puncture section and the axis of the needle tube working section form an included angle of beta =15 °.

Preferably, an included angle gamma between the fixing section of the needle tube and the working section of the needle tube is an obtuse angle.

Preferably, the free end of the extension pipe is provided with a connecting seat communicated with the extension pipe, and the connecting seat is provided with a protective cap.

Preferably, the body of the extension tube is sleeved with a catheter clip.

Preferably, the needle handle is in the shape of a butterfly wing, and a through handheld hole is further formed in the needle handle.

The invention has the beneficial technical effects that:

the invention relates to a special needle for an implanted drug delivery device, which comprises a needle tube, a needle handle fixed on the needle tube and an epitaxial tube communicated with the needle tube, wherein the needle tube is fixed on the needle handle, the needle tube is communicated with one end of the epitaxial tube, and the needle handle is fixed at the joint of the needle tube and the epitaxial tube; the needle tube comprises a transverse fixing section and a vertical working section, the fixing section and the working section are connected to form an L-shaped needle tube, the fixing section of the needle tube is fixed on the needle handle and communicated with the epitaxial tube, the lower end of the working section of the needle tube is smoothly connected with a puncturing section which is bent inwards through an arc-shaped transition section, the free end of the puncturing section is cut through a bevel plane to form a puncturing tip and a liquid outlet hole with an opening on the side surface, two symmetrical puncturing slopes are formed on the bevel plane of the puncturing tip through cutting, symmetrical main cutting edges and middle cutting edges are formed on two sides of the puncturing tip, the bevel plane on the puncturing tip is almost parallel to the working section of the needle tube, so that rear cutting edges on the bevel plane of the puncturing tip slide into the puncturing opening approximately in parallel, in the puncturing process of the needle tube, the rear cutting edges on the bevel plane of the puncturing tip do not generate cutting action on the periphery of the puncturing opening, and cuttings of a, thereby avoid getting into again after the relevant liquid and getting into in the human body, avoid producing the unnecessary injury to the human body, and can prolong the life who advances the medicine stopper, and simultaneously, be equipped with the puncture slope on the top of needle point, increase the atress working face of puncture in-process needle point, increase more effectual cutting edge, make the puncture by the more fragmentary of splitting at the puncture in-process, reduce the shrink elasticity of puncture, reduce the smear metal probability of back blade to being stabbed thing on the scarf, and reduce the resistance of puncture in-process, make the needle tubing safe laborsaving more when using.

Drawings

Fig. 1 is a schematic perspective view of a needle dedicated for an implantable drug delivery device;

FIG. 2 is a front view of a needle specific to an implantable drug delivery device;

FIG. 3 is a front view of the needle cannula;

FIG. 4 is a perspective view of the needle cannula;

FIG. 5 is an enlarged view of A in FIG. 3;

FIG. 6 is an enlarged view of B in FIG. 4;

FIG. 7 is a schematic view showing the shape and force (arrow direction) distribution of the puncture hole formed by the special needle of the present invention;

FIG. 8 is a schematic view showing the shape and force (arrow direction) distribution of a puncturing opening formed by using a conventional needle of the prior art;

in the figure: 11. the needle tube, 12, a needle handle, 13, a hand-held hole, 14, an extension tube, 15, a catheter clamp, 16, a connecting seat, 17, a protective cap, 111, a fixing section of the needle tube, 112, a working section of the needle tube, 113, a transition section, 114, a puncture section, 115, an inclined plane, 116, a puncture slope, 117, a liquid outlet hole, 118, a rear cutting edge on the inclined plane, 119, a dividing cutting edge and 120, a main cutting edge.

Detailed Description