A kind of pressure sensing type noinvasive puncture needleTechnical field
This utility model relates to a kind of pressure sensing type noinvasive puncture needle, belongs to medical apparatus and instruments puncture field.
Background technology
At present, the various puncture needles that clinical medicine uses, comprise ventricular puncture, puncture in Lumbar Vertebral Canal, splanchnocoel punctures, abdominal dialysis puncture and intubation, punctio vesicae, artery vessels punctuation, joint puncture and be positioned at the haematoma cavity of body or body surface, fluid collection chamber, abscess cavity punctures, all that the doctor of implementation and operation is according to imaging examination, clinical physical examination result, in conjunction with normal human anatomic structure, puncture by means of feel when clinical experience or even puncture, this through be everlasting clinical in the puncture procedure that carries out, that clinical diagnosis has wound to operate with treatment is indispensable. but in piercing process, due to each patient suffer from the disease difference itself, and the individual variation of normal human's structure, clinical manipulation doctors experience is different, in various clinical puncture, inevitably produce paracentesis depth forbidden, puncture arrives not prompting behind target location, even can cause excessive puncture, and cause penetration damage, as breast chamber, in the puncture of seroperitoneum, by the pumpback of injecting apparatus, puncture will could determine whether puncture needle enters fluid collection chamber after arriving certain depth, exploratory puncture so repeatedly, pumpback, the wound not only increasing patient is painful, also easily cause penetration damage simultaneously, as thoracentesis can puncture alveolar, cause pneumothorax, abdominal paracentesis is damaged to abdominal viscera by mistake, causes the hemorrhage of the organ such as liver,spleen,kidney, intestinal or infects. and therefore, clinical needs are a kind of can ensure the puncture needle that patient safety, doctor are easy for operation in body cavity puncture.
Summary of the invention
This Novel puncture needle to solve above shortcomings in prior art, and provide one can not only avoid not causing penetration damage to substantive tissue organ, blood vessel, but also accurately can judge a kind of pressure sensing type noinvasive puncture needle that puncture needle inserting needle puts in place.
The present invention's adopted technical scheme that solves the problem is: this kind of pressure sensing type noinvasive puncture needle comprises the outer pin of puncture, inner core, puncture outer needle stand, nut, spring, block, it is characterized in that: the pressure sensor device of puncture needle is by block, spring, inner core, nut is assembled, block is fixed on inner core, spring fitting is on inner core, the distance of block movement equals inner core and stretches in the distance of the outer pin sharp needle tip of puncture, the outer pin that punctures is bonding with the outer needle stand of puncture, inner core is positioned at the internal layer of the outer pin that punctures, nut is threaded with the outer needle stand of puncture, the skin of outer pin of puncturing is sleeve pipe, the rear end of sleeve pipe is a female Luer, other apparatus can be connect.The operation principle of this Novel puncture needle: by the pressure sensor device of puncture needle, in conjunction with the pressure differential existed between tissue and body cavity, carries out puncture prompting and the protection to substantive tissue organ and blood vessel in body cavity.When puncturing, noinvasive puncture needle is in normal morphology: passivity inner core stretches out the outside of the outer pin sharp tip that punctures, and spring nature relaxed state, is shown in Fig. 1.In puncture inserting needle process, because human body parenchymal tissue is to the resistance of passivity inner core, force spring-compressed, cause passivity inner core to bounce back in the inside of the outer pin sharp tip of puncture, meanwhile, inner core afterbody stretches out nut outside, sees Fig. 2.When the tissue that puncture needle penetrates body cavity outside arrives body cavity, sap cavity; passivity inner core is owing to losing the resistance of parenchymal tissue to it; spring is loose gets back to original position; passivity inner core is caused to stretch out outside needle tip; the round blunt end of elastic inner core can protect the endoceliac blood vessel of puncture, organ from the damage of puncture needle needle point, and inner core afterbody retracts to original position, namely points out puncture needle to arrive body cavity; normal condition got back to by puncture needle, sees Fig. 1.The sleeve pipe of puncture needle outside, can be used for transfusion or the various conduit of indwelling in body cavity.
Accompanying drawing explanation
Fig. 1 arrives the normal condition structural representation after body cavity with puncture needle before inserting needle.
Fig. 2 is the structural representation of puncture needle inserting needle process status.
In figure: 1. puncture outer pin, 2. inner core, 3. puncture outer needle stand, 4. nut, 5. block, 6. spring.
Detailed description of the invention
This utility model puncture needle is pressed such scheme and is implemented, and the pressure sensor device of puncture needle is assembled by block 5 and spring 6, hollow inner core 2 (following abbreviation inner core), nut 4.Block 5 and spring 6 are all arranged on inner core 2, the distance of block movement equals inner core 2 round blunt end and stretches in the distance of the outer pin sharp needle tip of puncture, nut 4 is threaded with the outer needle stand 3 of puncture, the outer pin 1 that punctures is connected with the outer needle stand 3 of puncture, the skin of outer pin 1 of puncturing is sleeve pipe, the rear end of sleeve pipe is a cylindrical female Luer, can external catheter.When puncture needle does not use, inner core 2 round blunt end is positioned at the needle point front end of the outer pin 1 that punctures, and spring is in nature relaxed state, sees Fig. 1, when puncture needle inserting needle, inner core 2 round blunt end is subject to the resistance that tissue applies, block 5 applies extruding force backward to spring 6, an extruding force acted on nut 4 is produced after spring 6 is subject to the extruding force of block 5, spring is forced to be in compressive state, inner core 2 round blunt end now shrinks in the sharp needle point of the outer pin 1 of puncture, and tail end stretches out nut 4, sees Fig. 2, when the tissue that the outer pin that punctures penetrates body cavity outside arrives gas-liquid chamber, owing to losing the resistance of tissue to inner core 2 round blunt end, the extruding force that spring 6 is applied to nut 4 is released, extruding force is converted into the bounce acting on spring 6 by nut 4, force spring 6 to be in relaxed state and get back to original position, original position is got back in the needle point outside that inner core 2 round blunt end stretches out the outer pin 1 of puncture sharp, tail end is also got back in nut 4 simultaneously, see Fig. 1, in inserting needle process, operator sees that inner core 2 tail end stretches out, namely represent that puncture needle arrives position, gas-liquid chamber, stop continuing inserting needle, the needle point that the round blunt end of elastic inner core 2 stretches out the outer pin 1 of puncture sharp is outside, thus the round blunt end of elastic inner core protects blood vessel when realizing puncture, parenchymal tissue is from damage, simultaneously, operator can be made accurately to control inserting needle put in place, also observe by hollow inner core, gather, extract liquid gas specimen, improve puncture efficiency.Remove the outer pin 1 of puncture and inner core 2, outer casing seat is connected with needs apparatus infuses or the various conduit of indwelling in body cavity.