CN201643335U

CN201643335U - Syringe needle with threaded surface

Info

Publication number: CN201643335U
Application number: CN201020180149XU
Authority: CN
Inventors: 丛茜; 金敬福; 齐迎春; 马毅; 刘玉荣
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2010-05-06
Filing date: 2010-05-06
Publication date: 2010-11-24
Anticipated expiration: 2020-05-06

Abstract

The utility model relates to a syringe needle with a threaded surface. The syringe needle is applied to the field of disposable intervention medical appliances in a clinical transfusion process, a sampling process, a puncturing process and the like. The syringe needle is characterized in that the surface of the syringe needle is a threaded surface in a threaded structure; an equidistant thread or variable-pitch thread is adopted; the groove depth (c) of the thread is 0.01-0.10 mm; the groove width (a) of the thread is 0.02-0.50 mm; and the thread pitch (b) of the thread is greater than 1 mm. A threaded groove can be an inverted triangle and can also be a circular arc, a rectangle and the like. The aim of adding the threaded surface of a needle tube is to reduce the continuous frictional resistance of the needle tube in the injection puncturing process and reduce the stimulation action of the needle tube on the subcutaneous nerve ending in the puncturing process, thereby realizing a pain relieving effect.

Description

The surface has the injection needle of spiral

Technical field

This utility model relates to the injection needle that a kind of surface has threaded form.Be applied to the disposable interventional medical device field of processes such as clinical transfusion, sampling, puncture.

Background technology

Interventional therapys such as transfusion injection, puncture sampling are treatment meanss indispensable, main in the clinical treatment.But utensil is that the patient fears and avoids one of factor of treatment to the destruction of skin histology and the pain that causes thereof in the injection piercing process.Generally speaking, human will inoculate various vaccines beginning, need medical treatments such as various punctures and injection when various diseases taking place hindering from birth.The injection, puncture pain and the body injury that reduce the operation receiveing person effectively are one of main directions of current medical device research.

At present, studies show that at injection, puncture pain mechanism the stimulation to subcutaneous teleneuron in the skin injury that needle point causes, the penetration Resistance of needle tubing and the piercing process is main pain root.At pain mechanism, the main method of the painless injection of existing report has (1) micropin technology.With injection of insulin pin and microneedle array is representative, this painless injection pin is by reducing the diameter of needle tubing, reduces the skin injury area and to the stimulation of subcutaneous nerve, even entry needle only penetrates epidermis in the injection process, do not reach the teleneuron layer, and realize painless purpose.Caliber is little but there is transfusion in this micropin, drawbacks such as manufacturing cost height; (2) the needle point sharpness is optimized.This is current conventional injection needle a kind of technology commonly used, and it is to utilize the method for optimizing needle point, can effectively reduce the puncture effect, but can not reduce the resistance of piercing process needle tubing; (3) Needleless injection.Needleless injection is to utilize high-pressure spray directly drug particles to be driven into subcutaneous a kind of technology, because there is not the pin piercing process, medicine only reaches the epidermis shallow-layer, and very high to the requirement of medicine, the implementation cost costliness; (4) injection skill and technique.The patient is by consummate handicraft in the clinical care, and as part massage, improve the purpose that methods such as puncture speed and angle can both realize painless injection, this skill and technique mainly relies on patient's handicraft.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned all shortcomings and the deficiency of existing syringe needle, provides a kind of surface to have the injection needle of spiral.By changing the needle surface form, the frictional resistance of syringe needle and skin histology in the minimizing injection piercing process reduces the stimulation of injection piercing process to teleneuron thus.

Above-mentioned purpose of the present utility model is achieved through the following technical solutions, and accompanying drawings is as follows:

A kind of surface has the injection needle of spiral, described injection needle surface is for having the thread surface of helicitic texture form, and screw thread adopts constant worm pich or gaining twist, and screw thread groove depth (c) is 0.01-0.10mm, thread groove width (a) is 0.02-0.50mm, and pitch (b) is greater than 1mm.

The thread groove cross section is del, circular arc or rectangle.

Described screw thread adopts one at least.

Described screw thread is whole or local being distributed as of needle surface.

Surface of the present utility model has the injection needle of spiral, can be used for all injections that intravenous needle, intramuscular injection pin, blood taking needle, living body sampling, body fluid drainage needle etc. are applied to soma puncture, medical intervention apparatus punctures.Its clinical use is identical with conventional injection puncture instrument, no special operational instructions for use.

Technique effect of the present utility model is:

Medical interventional instruments such as venoclysis needle in the clinical treatment fields such as injection, puncture sampling, intramuscular injection pin, blood taking needle, biopsy can be applicable to infuse.This injection needle reduces the frictional resistance of syringe needle and skin histology by at conventional syringe needle surface machining screw configuration, realizes that injection, puncture subtract the pain purpose.Generally speaking, sharp needle point is cut skin open in routine injection, piercing process, syringe needle and skin histology produce frictional resistance, and pain is mainly derived from needle point to stimulation, syringe needle and the skin histology friction of teleneuron and viscidly involve the nerve stimulation that causes, the effects such as sensitivity of foreign materials.The disclosed syringe needle of this utility model with threaded form, can reduce the contact area of syringe needle and skin histology in the injection piercing process, eliminate the gathering of the stress stimulation that successive viscid friction causes and reduce its stimulus intensity, when adopting the surface that lubricant is arranged, improve the distribution and the lubricant effect of lubricant.

Description of drawings

Fig. 1 (a) is a kind of structural representation of the present utility model;

Fig. 1 (b) is the helicitic texture partial enlarged drawing of Fig. 1 (a);

Fig. 1 (c) is the partial enlarged drawing (the thread groove cross section is a del) of Fig. 1 (b) 3;

Fig. 1 (d) is the partial enlarged drawing (the thread groove cross section is a circular arc) of Fig. 1 (b) 3.

Fig. 2 is a needle surface helicitic texture sketch map.

Fig. 3 (a) is that needle surface is laterally along bar (coarse pitch) form sketch map;

Fig. 3 (b, c, d) is respectively the A-A ｀ profile of Fig. 3 (a), and wherein: Fig. 3 (b) is that the thread groove cross section is a del, and Fig. 3 (c) is for the thread groove cross section is a circular arc, and Fig. 3 (d) is that the thread groove cross section is a rectangle.

Fig. 4 (a, b) is the application sketch map in other types injection, the puncture instrument.

4. needle point 5. transfusion device Connection Blocks 6. transfusion device handles 7. sub-pins of 1. needle tubing Connection Blocks, 2. needle tubings surfaces, 3. groove screw threads (bar) in the accompanying drawing

A. thread groove width b. pitch c. screw thread groove depth.

The specific embodiment

Below attachment figure illustrated embodiment to further specify particular content of the present utility model be its embodiment.

The entry needle that a kind of surface has spiral is to be made of syringe needle (or puncture instrument) and its surperficial groove shape screw thread, and the needle surface threaded form can be a del, also can be circular arc or rectangle etc.The form of its needle surface can be that roll extrusion realizes in preparation of pipes technology, also can adopt the method preparation of reworking on needle tubing.

The needle surface screw thread can be equidistant single thread on same syringe needle, also can be the many screw threads of displacement; Screw thread groove depth (c) scope is 0.01-0.10mm; Thread groove width (a) is 0.02-0.50mm; Pitch (b) becomes the entry needle surface along strip greater than 1mm until screw thread; It can be to occupy whole needle tubings surface that the syringe needle screw thread distributes, and also can be local.

Surface of the present utility model has the entry needle of spiral, can be used for all injections that intravenous needle, intramuscular injection pin, blood taking needle, living body sampling, body fluid drainage needle etc. are applied to soma puncture, medical intervention apparatus punctures.Its clinical use is identical with conventional injection puncture instrument, no special operational instructions for use.

Characteristics of the present utility model are the groove shape screw thread on needle tubing surface, with the intramuscular injection pin is example, the injection needle surface has groove shape screw thread, the thread groove area account for the needle tubing surface area 20% in, its groove distribute can be consult shown in Figure 1, also can consult shown in Figure 3ly, contain and a plurality ofly laterally form along bar shapeds.In clinical use, because the continuous groove effect on needle tubing surface, reduced the real contact area of syringe needle and skin histology, and the continuous friction of syringe needle and skin histology become be interrupted friction, can effectively reduce skin histology sticking together of needle surface led the frictional resistance and to the stimulation of subcutaneous teleneuron of stagnating.Disclosed injection needle using method of this utility model and conventional entry needle are as good as, and the patient uses does not have SOR, for by the patient owing to reduce puncture frictional resistance, can realize subtracting the pain effect.

Consult shown in Figure 4ly, the thread surface form can be used for venoclysis needle, injection such as the primary and secondary pin that biopsy is used Centesis instrument.According to the size of syringe size, its screw thread can be a multiple whorl, also can be single thread, or a plurality of along bar shaped, and the threaded recess place accounts for, and needle surface is long-pending to be less than 20%.Identical with intramuscular injection pin application example, the purpose that the surface has injection puncture instruments such as the venoclysis needle, primary and secondary pin, blood taking needle of screw thread is by reducing surperficial contact area and state, realizing subtracting the pain purpose.

As when adopting surface lubricant, the groove shape threaded form on surface can be strengthened the lubricant lubricant effect, further reduces puncture and frictional resistance, and then realizes subtracting the pain purpose.

The processing of needle surface form can be finished in drawing pipe technology in roll extrusion, also can utilize method preparations such as machinery, laser or chemical etching after the entry needle molding.

Claims

1. a surface has the injection needle of spiral, it is characterized in that, described injection needle surface is for having the thread surface of helicitic texture form, screw thread adopts constant worm pich or gaining twist, screw thread groove depth (c) is 0.01-0.10mm, thread groove width (a) is 0.02-0.50mm, and pitch (b) is greater than 1mm.

2. surface according to claim 1 has the injection needle of spiral, it is characterized in that, the thread groove cross section is del, circular arc or rectangle.

3. surface according to claim 1 and 2 has the injection needle of spiral, it is characterized in that, described screw thread adopts one at least.

4. surface according to claim 1 and 2 has the injection needle of spiral, it is characterized in that, described screw thread is whole or local being distributed as of needle surface.