CN201356858Y

CN201356858Y - Novel medical use vessel indwelling needle

Info

Publication number: CN201356858Y
Application number: CNU2009200685732U
Authority: CN
Inventors: 石学银; 邹最; 夏建华; 王亚华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-09
Filing date: 2009-03-09
Publication date: 2009-12-09
Anticipated expiration: 2019-03-09

Abstract

The utility model relates to a novel medical use vessel indwelling needle, which comprises a body of an inner penetrating steel needle, a needle head of the inner penetrating steel needle and an outer sleeving hose. The vessel indwelling needle is characterized in that a groove is formed on the body of the inner penetrating steel needle; the needle head of the inner penetrating steel needle is designed in a manner that the inclined surface thereof is downward when the steel needle enters the vessel; a small gap is formed at a starting point on one side of the outer sleeving hose close to the needle head; and anticoagulant coatings are added on the inner and the outer walls of the inner penetrating steel needle and the inner wall of the outer sleeving hose. Through the groove, the blood return phenomenon at the inner part of the inner penetrating steel needle can be observed, and whether the outer sleeving hose enters a vein or an artery can be judged, thereby greatly increasing the success rate of a post puncture tube, reducing the probability that the inner penetrating steel needle penetrates the opposite vessel, and preventing the inner penetrating steel needle from being blocked by small blood clot after repeated exploratory needle insertion.

Description

Novel medical blood vessel remaining needle

Technical field

The present invention relates to a kind of blood vessel remaining needle that is widely used in medical purpose, particularly a kind of novel medical blood vessel remaining needle.

Background technology

Tremulous pulse and venous detaining needle are medical field apparatus commonly used.Major operation patient and part Intensive Care Therapy patient need arterypuncture to put pipe monitor blood flow dynamics index (as mean arterial pressure, systolic pressure, diastolic pressure or the like); Nearly all surgical patient all needs puncture and intubation, infuses to set up the peripheral vein path.In this operating process, need use blood vessel remaining needle.

Domestic and international widely used arterial puncture needle has two kinds at present: a kind of is to utilize venipuncture needle puncture tremulous pulse, and its shortcoming is to judge whether trocar sheath (needing to keep somewhere pressure measurement) enters tremulous pulse.Wear draw point intravasation when interior, and trocar sheath causes puncture failure (more common the atherosclerotic) not during intravasation easily; Another kind is special-purpose arterial puncture needle: on the basis of venipuncture needle, wear in interior that draw point is inner to increase a stone dead wire, when interior wear draw point and penetrate tremulous pulse after, send into stone dead wire and guide, insert trocar sheath then.Its shortcoming has four aspects: 1, this pin thick (because in wear the draw point the inside set up soft seal wire), and bigger to patient's local damage, especially repeatedly during exploratory puncture; 2, wear in stone dead wire is arranged in the draw point, when interior when wearing draw point and penetrating tremulous pulse, the blood back-flow velocity is very slow, wear the time lengthening of draw point tip location in the judgement, in wear the draw point top and penetrate easily vascellum laterale, insert trocar sheath failure (though be provided with a plurality of small gaps on the interior draw point surface of wearing, this problem is not well solved yet) after causing puncture; 3, because of needs stone dead wire is inserted tremulous pulse, may cause the endarterium damage; 4, cost is big, the cost height.

Domestic also have entity and individual that arterial puncture needle is studied, and is 01216233.7 patent as application number, can not judge the whether patent of intravasation of trocar sheath but retrieve.

Summary of the invention

The present invention proposes a kind of novel medical blood vessel remaining needle, can judge whether trocar sheath enters artery and vein, improves the success rate of the rearmounted pipe of moving puncture; Draw point is worn out the probability to wall in when pipe is put in the reduction venipuncture.

The present invention realizes by following technical scheme:

A kind of novel medical blood vessel remaining needle, by interior wear the draw point entity, in wear the draw point syringe needle and the overcoat flexible pipe is formed, it is characterized by: design groove interior wearing on the draw point entity, in when wearing draw point syringe needle intravasation the inclined-plane downward, at overcoat flexible pipe start design breach, increase the anticoagulant coating on inside and outside wall of draw point and the overcoat hose inner wall interior wearing.

Wear the two-stage nitration of first three branch of draw point entity in the position of described groove is arranged on, shape can be many casements.

The start position of described overcoat flexible pipe is between described groove starting point and needle slope bottom.

Described remaining needle is worn the draw point entity design for hollow fully in described when intravenous injection, the chamfered portion of wearing the draw point syringe needle in when intra-arterial injection is designed to solid; Perhaps be designed to hollowly, plugged zone is set in inclined-plane bottom.

Beneficial effect of the present invention is: wear the inner blood backflow of draw point situation in can observing by groove, judge whether the overcoat flexible pipe enters artery and vein, improved the success rate of the rearmounted pipe that punctures greatly, wear draw point in the minimizing and penetrate the probability of opposite blood vessel, wear draw point in preventing to sound out repeatedly behind the inserting needle to be blocked by little blood clot.

Description of drawings

Wear the draw point intravasation in when Fig. 1 is arterypuncture, the overcoat flexible pipe is still at EV sketch map

Wear draw point and overcoat flexible pipe in when Fig. 2 is arterypuncture all at endovascular sketch map

Wear draw point in when Fig. 3 is arterypuncture and pass blood vessel, and the overcoat flexible pipe is at endovascular sketch map

Fig. 4 is a structure enlarged drawing of the present invention

Fig. 5 wears draw point groove sketch map in being

Fig. 6 wears draw point groove profile in being

Fig. 7 is the sketch map of overcoat flexible pipe breach of the present invention

Fig. 8 wears the inside and outside wall of draw point and outer sleeve inner wall is provided with anticoagulant figure layer sketch map interior

Fig. 9 is that the overcoat flexible pipe is not worn out the sketch map to vascellum laterale

Figure 10 is the sketch map that the overcoat flexible pipe is worn out blood vessel

Figure 11 is a groove apical position sketch map

Wear the draw point sketch map in when Figure 12 is used for vein for puncture needle

Wear the draw point sketch map in when Figure 13 is used for tremulous pulse for puncture needle

The specific embodiment

First kind of embodiment of the present invention is: as Fig. 7, Fig. 8, Figure 12 and shown in Figure 13, in wear draw point syringe needle 8 chamfered portion be solid or hollow, in wear draw point entity 3 for hollow, at the interior two-stage nitration of wearing draw point 3 first three branch groove 5 is set and wears in the draw point in making and be interlinked to the outside, blood is worn when flowing through in the draw point from interior, just can observe blood by groove 5.When being used for intravenous injection because the blood back-flow velocity is slow and vein blood vessel is more tiny, in wear draw point syringe needle 8 and be designed to hollow its easier blood vessel that penetrates that makes; When being used for intra-arterial injection, the blood back-flow velocity is very fast and arteries is thicker, in wear draw point syringe needle 8 and be designed to solid, but it is too fast for preventing that blood from refluxing, cause judging whether overcoat flexible pipe 2 inserts blood vessel, or in wear draw point syringe needle 8 be designed to hollow, but in interior shutoff 11 of bottom design of wearing draw point syringe needle 8, with control blood back-flow velocity, judge clearly whether overcoat flexible pipe 2 inserts blood vessel.14 places are provided with breach 9 in overcoat flexible pipe starting point, and breach 9 can be different shape, and blood is worn draw point in can flowing into by breach, and groove starting point 13 can exceed overcoat flexible pipe starting point 14, helps rapider judgement overcoat flexible pipe starting point 14 and has entered tremulous pulse.As Fig. 9 and Figure 10, in wear draw point syringe needle 8 the inclined-plane downward when being made as intravasation, penetrate the probability of opposite blood vessel to wear draw point in reducing, improve and insert the success rate of trocar sheath, on the surface of puncture draw point outer wall 7, groove 5 with anticoagulant coating (as heparin coating) is set above the overcoat hose inner wall 6, when reducing repeatedly exploratory puncture, in wear the probability that draw point and overcoat flexible pipe are blocked by little blood clot easily, improve puncture success rate.

Second kind of embodiment of the present invention is: as Fig. 9, and Figure 10 and shown in Figure 11, the angle of inclination of wearing the draw point needle slope on the basis of above-mentioned embodiment, increasing, thus wear the probability that draw point penetrates the opposite blood vessel in reducing.

The third embodiment of the present invention is: the length that can increase overcoat flexible pipe 2, the length of promptly overlapping flexible pipe is concordant with needle slope bottom 16, can shorten like this overcoat flexible pipe and in wear the draw point syringe needle distance, timely blood back, reaction puncture situation penetrates the probability of opposite blood vessel to wear draw point in reducing.

The 4th kind of embodiment of the present invention is: the length of overcoat flexible pipe can also be concordant with described groove starting point 13, is beneficial to judge more rapidly the position relation (annotate: during puncture, the trocar sheath lower wall is introduced into blood vessel) of trocar sheath and blood vessel.

Claims

1, a kind of novel medical blood vessel remaining needle, by interior wear the draw point entity, in wear the draw point syringe needle and the overcoat flexible pipe is formed, it is characterized by: design groove interior wearing on the draw point entity, in when wearing draw point syringe needle intravasation the inclined-plane downward, at overcoat flexible pipe start design breach, increase the anticoagulant coating on inside and outside wall of draw point and the overcoat hose inner wall interior wearing.

2, novel medical blood vessel remaining needle as claimed in claim 1 is worn the two-stage nitration of first three branch of draw point entity in the position that it is characterized by groove is arranged on.

3, novel medical blood vessel remaining needle as claimed in claim 1, the shape that it is characterized by groove can be porous type.

4, novel medical blood vessel remaining needle as claimed in claim 1, the length that it is characterized by described overcoat flexible pipe is between described groove starting point and needle slope bottom.

5, novel medical blood vessel remaining needle as claimed in claim 1 is characterized by when intravenous injection and wears the draw point entity design for hollow fully in described.

6, novel medical blood vessel remaining needle as claimed in claim 1, the chamfered portion of wearing the draw point syringe needle in it is characterized by when intra-arterial injection is designed to solid, perhaps is designed to hollowly, in the bottom, inclined-plane plugged zone is set.