CN100457210C

CN100457210C - Painless syringe

Info

Publication number: CN100457210C
Application number: CNB2005100172920A
Authority: CN
Inventors: 任露泉; 王京春; 丛茜; 邱小明; 赵寿经; 陈丽莉
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2005-11-18
Filing date: 2005-11-18
Publication date: 2009-02-04
Anticipated expiration: 2025-11-18
Also published as: CN1765428A

Abstract

The invention relates to a medical appliance, especially relating to an indolence injector. The invention is purposed to provide an indolence injector with simple structure and reasonable designed surface injection needle according to the bionic theory. The bionic non-smooth surface feature indolence injector technique adds non-smooth surface feature units with a certain shape and relative distribution theory on the surface of injection needle on the surface of injection needle, to transform the smooth feature of former needle to the non-smooth feature. The surface of needle of indolence injector has uniformly distributed non-smooth units while their shape can be ellipse concave, round concave, wave or saw-tooth; the distributed feature can be that covering the whole surface of element or covering one or several areas of element; the non-smooth units different diameters, pitches and processing depth while every two units have different center distance.

Description

Painless syringe

Technical field:

The present invention relates to a kind of medical apparatus, particularly relate to a kind of painless syringe.

Background technology:

To hospital's have an injection, draw blood chemical examination, acupuncture, postoperative stitching etc. all is a thing of making us feeling timid, and it is all the more so that particularly those need the patient of long term injections.Why have an injection and to lead the people so with one's hair standing on end? this comes from the swelling pain to the marrow when having an injection.Injection pain is because syringe adopts is cylindrical structural, very smooth of outer surface, and when injection, syringe needle thrusts people's skin, and its outer surface contacts closely with skin histology, and contact area is big more, and pain is strong more.Simultaneously, injection needle can stay many metal particles when thrusting skin, thereby stronger to nerve stimulation, and pain is also very strong.Allow the injection " painless " be the hope that each patient dreams of.For solving this difficult problem, at present, mainly contain following several technical scheme: be on the one hand on the injection skill, outstanding injection for curing teacher or treatment nurse are when giving patient injection, can be by oneself practical experience for many years, it is minimum to find best injection speed, ideal injection depth and optimum injection skills such as injection site that the twinge that brings to human body is reduced to, but can say for certain: the paramount boundary that wants to allow injection reach " painless " also can't be realized.

Be that the structure that changes syringe promptly changes syringe size and material on the other hand, or increase auxiliary equipment.Existing at present following several technical schemes: Japanese scientist imitates mosquito and develops superfine injection needle, has made only 0.1 millimeter entry needle of 1 millimeter of a kind of length, diameter with silicon dioxide, makes only 0.16 micron thickness of entry needle tube wall.Then this entry needle is contained on 0.5 millimeter the needle tubing, with its blood drawing or injectable drug.The syringe needle of even now is little to people's nerve stimulation, makes the imperceptible pain of people, and still, present " miniature syringe needle " is very crisp, and the syringe needle end usually can fracture in blood vessel, and this might cause thrombosis and fatal complication.The meticulous extraction medicine of syringe needle is also relatively more difficult.High to requirement on machining accuracy.

The syringe of Britain inventor Kreuk invention is " painless " why, mainly is that the speed of pin down is exceedingly fast.As for the used syringe needle of new instrument, also than traditional more level and smooth, hard direct sum taper.This novel syringe needle has passed through clinical trial smoothly in mound, Oxford gill hospital pain research center.This novel injector size is suitable with pen, wherein comprises a small pressurized air vessel and small-sized sealing medicament reservoir, and two containers are connected with each other, and the syringe bottom has a high pressure micro nozzle device.This syringe needle with special construction is transdermal at a terrific speed, but can not make subcutaneous tissue and vascular injury.It is to utilize compressed air to move syringe needle, the syringe needle translational speed from zero increase to 100 kms/hour only need 20,000/second.This technology is many because of auxiliary equipment, and the injection cost is higher, and general wage-earners are difficult to accept.

Summary of the invention:

Use a kind of human muscle damage of not only can reducing, " painless syringe " that can also allow the medicinal liquid of output be evenly distributed is vital.Theoretical research shows that the shape of injector surface, the size of syringe, injection speed all have effect to injecting painless behavior, but what play decisive role is the injector surface shape.Adopt what form that the inserting needle resistance is reduced, and reach the painless effect of having an injection?

The objective of the invention is to according to bionic principle, provide a kind of simple in structure, the rational painless syringe of injection needle surface texture.

Above-mentioned purpose of the present invention is achieved in that accompanying drawings is as follows:

Bionic non-smooth surface form painless syringe technology is to apply definite shape on the injection needle surface and non-smooth units body that have the corresponding regularity of distribution, makes needle surface become non-smooth morphology by original smooth morphology.The acupuncture parts surface of painless syringe has and is approximate equally distributed non-smooth units body, and its shape can be oblong pits, circular pit, waveform, zigzag; Its distribution can be distributed in whole parts surface, also can be distributed in the some or a plurality of zones of parts surface.Non-smooth units body has the width of different-diameter size, different pitch, different working depths etc.; Has different centre distance between two cell cubes.Can adopt the processing technique of laser engraving, can adopt also that machining, roller manufacturing process such as molded are simple, easy and simple to handle, dependable performance, Surface-micromachining process with low cost.

Occurring in nature organism surface tissue has very particular structure and performance through the evolutionary optimization in 1 years.The organ of ingesting of insecticide is called mouthpart, and the mouthpart of insecticide resembles a hollow injection needle, when getting food acicular mouthpart is inserted into the juice of sucking in the vegeto-animal tissue wherein, and this mouthpart is called sucking mouth parts.Sucking mouth parts (piercing-sucking mouthparts) not only has the structure of sucking liquid food, but also the structure with the animal vegetable tissue of thrusting, thereby can sting blood of suction animal or the juice of plant.The mouthpart of Semiptera, Homoptera and Diptera mosquito class etc. belongs to sucking mouth parts.Scientist proposes, and why painless the mosquito bite people is, is that therefore can dwindle the pain sensation greatly experiences area because its long processus coracoideus has serrated-surface.And the syringe needle of syringe is more smooth, thereby causes pain.Female mosquito is before common camera lens, even amplify tens times, their face seems also the syringe needle the spitting image of syringe.But electron micrograph is told us, and the mouth of mosquito does not have the such slick surface of injection needle, and diameter also has only its 1/tens.The mouth of mosquito looks and looks like the bar mace, has only the fore-end smooth surface, other all are jagged, but sawtooth sharp-pointed when it is sucked blood is cut skin as the scalpel of exquisiteness, the slick leading portion image-stone oil of pin device drill bit is equally pushed in, therefore can only cause a very little wound, compare with the surface that injection needle is level and smooth, the area that jagged mouthpart contacts with skin histology is less, reduced and thrust resistance, reduced stimulation, so the pain that produces reduces the almost imperceptible pain of let us greatly for nerve.After the mouthpart of mosquito thrust skin, oozy saliva was contained anticoagulant material, and it can be sucked blood heartily.Owing to contain antibacterial in the saliva of mosquito, can cause pruritus and pain after biting.In fact, mosquito can be finished the action of biting under the situation that you do not have to feel fully.

Traditional idea thinks that the surface roughness of parts is more little, and the resistance that produces during motion is more little, and just the resistance of the smooth more generation in surface is just more little.But we know, the scale waveform body surface of Squama Manis makes to have some gaps between body surface and soil surface, can reduce the captivation of animal body surface to soil effectively, and the scale waveform of Squama Manis has the effect that resistance falls in visbreaking.Shark speed of moving about in water reaches 30KM/H, also is because the result of the non-smooth surface drag reduction of sharkskin.The dynamic characteristic of research mechanical part, with similar biological existence mechanism and body surface form is reference, similar organism surface form key feature is applied to the component surface of motion, have property of reduction drag so that have the parts of this non-smooth surface form.

Effect of the present invention is: bionical painless syringe technology exactly has this specific character.The present invention is the mouthpart shape of imitating mosquito, carries out bionic, non-smooth processing in injector surface, has reduced the contact area of syringe and skin, has reduced the inserting needle resistance.Simultaneously because the syringe inner surface also is a non-smooth surface, like this, when injection, the medicinal liquid syringe endoporus of flowing through, its scraggly inner wall surface makes medicinal liquid and syringe needle inwall contact area reduce, and horizontal direction pushes away the medicine resistance and reduces, and the medicinal liquid flow velocity also can relatively be accelerated, thereby injection speed is accelerated, reduced the time of contact of syringe needle and muscle.And reducing of needle sizes can the reduction injection speed.Bionical painless syringe technological break-through the method for traditional change syringe needle area of bed, use modern bionics technology, the optimizing application experimental technique, making has an injection has reached painless condition.

Description of drawings

Fig. 1 is that oblong pits is arranged sketch map entirely for non-smooth units body;

Fig. 2 is that waveform is arranged sketch map entirely for non-smooth units body;

Fig. 3 is the omnidistance sketch map of arranging of zigzag for non-smooth units body.

The specific embodiment

Below in conjunction with the accompanying drawing illustrated embodiment, further specify particular content of the present invention and embodiment thereof.

Consult Fig. 1: non-smooth units body is that oblong pits is arranged sketch map entirely.Said non-smooth units body is the oblong pits form, oval minor axis, the centre-to-centre spacing of cheating between dark and ellipse can change, the ellipse short shaft excursion is 0.4mm～0.6mm, cheating dark excursion is 0.05mm～0.08mm, the excursion of centre-to-centre spacing is 1.0mm～1.5mm, dwindles gradually or amplifies.The section form of oblong pits can be the elliptical cylinder-shape pit, also can be the elliposoidal pit; Non-smooth units body can overall distribution at the acupuncture parts surface, also can be distributed in and needle point 3mm～25mm between.Concrete parameter is desirable:

The dark h=0.05mm of pit, ellipse Major axisA=0.7mm, minor axis b=0.4mm, centre-to-centre spacing L=1.0mm;

The dark h=0.065mm of pit, TransverseA=0.7mm, minor axis b=0.5mm, centre-to-centre spacing L=1.25mm;

The dark h=0.08mm of pit, ellipse Major axisA=0.7mm, minor axis b=0.6mm, centre-to-centre spacing L=1.5mm.

Consult Fig. 2: for non-smooth units body is the omnidistance sketch map of arranging of waveform.Said non-smooth units body is that zigzag variant form is a waveform, can equidistantly arrange, also can be that displacement is arranged or cross arrangement, and its ripple degree of depth, groove width, trough are apart from changing, its ripple change in depth scope is 0.05mm～0.08mm, the groove width excursion is 0.4mm～0.6mm, and trough is 1.0mm～1.5mm apart from excursion.Concrete parameter is desirable:

The dark h=0.05mm of ripple, ditch groove width b=0.5mm, trough is apart from L=1.5mm;

The dark h=0.065mm of ripple, ditch groove width b=0.6mm, trough is apart from L=1.0mm;

The dark h=0.08mm of ripple, ditch groove width b=0.4mm, trough is apart from L=1.25mm.

Consult Fig. 3: for non-smooth units body is the omnidistance sketch map of arranging of zigzag.Said non-smooth units body is pinnacle zigzag or flat-top zigzag, can equidistantly arrange, also can be that displacement is arranged or cross arrangement, and its serration depth, groove width, tooth pitch can change, its tooth depth excursion is 0.05mm～0.08mm, the groove width excursion is 0.4mm～0.6mm, and the tooth pitch excursion is 1.0mm～1.5mm.Concrete parameter is desirable:

Tooth depth h=0.05mm, ditch groove width b=0.6mm, tooth pitch L=1.25mm;

Tooth depth h=0.065mm, ditch groove width b=0.4mm, tooth pitch L=1.5mm;

Tooth depth h=0.08mm, ditch groove width b=0.5mm, tooth pitch L=1.0mm.

Claims

1. A painless syringe, the surface of the acupuncture part has non-smooth units that are approximately uniformly distributed, and its shape is oval-shaped pits, circular pits, waves, and zigzags; its distribution state can be distributed throughout the The surface of the component can also be distributed in one or more areas on the surface of the component. It is characterized in that the minor axis of the elliptical pit, the center distance between the pit depth and the ellipse can be changed, and the variation range of the minor axis of the ellipse is 0.4mm ～0.6mm, the variation range of the pit depth is 0.05mm～0.08mm, the variation range of the center distance is 1.0mm～1.5mm, gradually shrink or enlarge, the cross-sectional form of the elliptical pit can be an elliptical cylindrical pit, or It is an ellipsoidal pit; the non-smooth unit body can be distributed on the surface of the acupuncture part as a whole, or can be distributed between 3mm and 25mm from the needle tip.