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CN-122005028-A - Puncture-preventing trocar for internal fistula puncture and system thereof

CN122005028ACN 122005028 ACN122005028 ACN 122005028ACN-122005028-A

Abstract

The invention discloses an anti-needling trocar for internal fistula puncture and a system thereof, which relate to the technical field of medical appliances and comprise a rebound type needle core composed of a short pipe body, a long pipe body, an internal needle and a spring, wherein the edge of the tail part of the short pipe body is provided with a positioning groove, the long pipe body is connected with the tail part of the short pipe body, the inner side of the long pipe body is fixedly provided with two limiting blocks, the internal needle penetrates through the short pipe body and the long pipe body, the middle part of the internal needle is fixedly provided with a round block, the round surface of round piece near short pipe body one side is fixed with the locating piece, and the locating piece is inserted in the constant head tank, and the round surface of round piece both sides is contacted with short pipe body afterbody and stopper respectively, and round piece side is opened there are two release grooves, and two release grooves stagger with two stopper and distribute, and the spring housing is established on the inner needle, and it is located between the inner chamber head of short pipe body and the round piece and is in compression state all the time. The trocar is designed through the rebound type needle core mechanism, and only the long tubular body is required to be rotated after the puncture is successful, so that the compressed spring drives the inner needle to retract into the short tubular body rapidly, and the instantaneous isolation of the inner needle is realized.

Inventors

  • ZHANG LIPING
  • ZHAO DELI

Assignees

  • 广州医科大学附属中医医院(广州市中医中药研究所、广州市中医医院、广州中医药大学附属广州中医医院、广州市针灸医院)

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The utility model provides an internal fistula is puncture with preventing acupuncture trocar, including resilience formula nook closing member, a serial communication port, resilience formula nook closing member comprises nozzle stub body (1), long tubular body (2), interior needle (3) and spring (4), nozzle stub body (1) head is provided with the joint and is connected with and detains the needle, constant head tank (5) have been seted up to its afterbody edge, nozzle stub body (2) rotate connect at nozzle stub body (1) afterbody, its inboard is fixed with stopper (6) that two symmetries set up, interior needle (3) run through nozzle stub body (1) and nozzle stub body (2), its middle part is fixed with circular piece (7), be fixed with locating piece (8) on the round surface that circular piece (7) are close to nozzle stub body (1) one side, locating piece (8) are inserted in constant head (5), the round surface of circular piece (7) both sides is contacted with nozzle stub body (1) afterbody and stopper (6) respectively, two symmetrical release groove (9) are seted up to circular piece (7) side, two release groove (9) are staggered with two stopper (6) and are distributed, spring (4) cover is established on nozzle stub body (1) and is in between the inner chamber (1) and the compression state.
  2. 2. The puncture-preventing trocar for internal fistula puncture according to claim 1, wherein a pair of cylinders (10) is fixed on the outer side of the tail of the short tube body (1), the head of the long tube body (2) is sleeved on the tail of the short tube body (1), a pair of circumferential guide grooves (11) are formed in the side face of the head of the long tube body (2), and the two cylinders (10) are respectively arranged in the two guide grooves (11).
  3. 3. The anti-needlestick trocar for internal fistula puncture of claim 2 wherein the guide slot (11) has a length greater than one-fourth of the circumference of the cross-section of the long tubular body (2) and less than one-half of the circumference of the cross-section of the long tubular body (2).
  4. 4. The puncture-preventing trocar for internal fistula puncture according to claim 1, wherein a plurality of tapered connecting columns (12) distributed in an annular array are connected between the short tube body (1) and the long tube body (2).
  5. 5. The puncture-preventing trocar for internal fistula puncture according to claim 1, characterized in that the retention needle consists of a first needle seat (13) and an outer needle (14), the first needle seat (13) is connected to the joint of the head of the short tube body (1), and the outer needle (14) is fixed on the first needle seat (13) and sleeved outside the inner needle (3).
  6. 6. The puncture-preventing trocar for internal fistula puncture according to claim 5, wherein the front end of the inner needle (3) is penetrated out from the front end of the outer needle (14), and the rear end thereof is penetrated out from the tail of the long tubular body (2) and is fixed with the second needle seat (15).
  7. 7. The puncture-preventing trocar for internal fistula puncture according to claim 1, wherein the limiting block (6) and the release groove (9) are distributed at an included angle of 90 degrees with the internal needle (3) as an axis, and the limiting block (6) can pass through the release groove (9).
  8. 8. The anti-acupuncture trocar for internal fistula puncture according to claim 1, wherein an anti-false touch operation area and a non-operation area are axially arranged on the outer side of the long tubular body (2), the anti-false touch operation area is formed by coating anti-slip elastic materials, the non-operation area is of a smooth surface structure, and the long tubular body (2) can rotate relative to the short tubular body (1) only when an operator applies a rotating force to the anti-false touch operation area, so that a limiting block (6) is triggered to be aligned with a release groove (9) and the internal needle (3) is retracted, and the internal needle (3) is prevented from rebounding in advance due to false touch in the puncture pushing or needle holding process.
  9. 9. An internal fistula puncture system comprising the puncture-preventing trocar for internal fistula puncture according to any one of claims 1-7, further comprising a B-ultrasonic instrument, wherein an ultrasonic probe (16) is connected to the B-ultrasonic instrument, and a replaceable probe spacer is sleeved on the head of the ultrasonic probe (16).
  10. 10. The internal fistula puncture system according to claim 9, wherein the probe spacer consists of a film sleeve (17), thin strips (18) and a flexible buckling ribbon (19), the film sleeve (17) is sleeved on the head of the ultrasonic probe (16), a plurality of thin strips (18) which are uniformly distributed are arranged outside the sleeve mouth, two ends of each thin strip (18) are fixed on the film sleeve (17) to form perforations, and the flexible buckling ribbon (19) passes through the perforations and is fastened on the handle of the ultrasonic probe (16).

Description

Puncture-preventing trocar for internal fistula puncture and system thereof Technical Field The invention relates to the technical field of medical appliances, in particular to an anti-needling trocar for internal fistula puncture and a system thereof. Background Hemodialysis is an important treatment for patients with end-stage renal disease that is repeatedly accepted for a long period of time, with arteriovenous fistulae being the most common and safest form of vascular access for hemodialysis, with the puncturing operation extending almost throughout the patient's entire dialysis cycle. In clinical practice, the internal fistula puncture is usually required to be completed under the conditions of repeated times per week and long-term repetition, and high requirements are put on puncture safety, stability and professional protection of medical staff. At present, the internal fistula puncture is generally completed by adopting a trocar structure, namely, the blood vessel puncture is completed by the cooperation of an internal needle and an external needle, the internal needle is withdrawn after the puncture is successful, and only the external needle is reserved for establishing a blood passage. However, the existing trocar commonly used in clinic still relies on a manual needle drawing mode to finish the removal of the inner needle, and the process inevitably leads the inner needle to be in an exposed state in a short time after the successful puncture, especially in a hemodialysis environment, medical staff is frequently operated and has tension rhythm, and the accidental puncture of the needle tip is easily caused by factors such as slipping of hands, involuntary movement of limbs of a patient or limited operation angle. The needle-stick injury not only can cause instant skin injury, but also is more likely to cause occupational exposure risk of blood-borne pathogens such as hepatitis B virus, hepatitis C virus, human immunodeficiency virus and the like, and is one of the major occupational safety hazards faced by medical personnel in dialysis rooms for a long time. Although some medical institutions reduce risks by strengthening operational training or standardizing waste needle disposal procedures, the risk of needle sticks remains objective and is difficult to eliminate fundamentally without the instrument structure itself being altered. In order to improve the success rate of internal fistula puncture and reduce complications, in recent years, an internal fistula puncture technology under ultrasonic guidance is gradually popularized in clinic. Through the B ultrasonic real-time imaging guidance, the trend, depth and unobstructed condition of the blood vessel can be accurately judged, and the method is particularly suitable for patients with poor blood vessel conditions or multiple puncture failures. However, in ultrasound guided lancing, the ultrasound probe needs to be in direct contact with the patient's skin and often is synchronized with the lancing operation, which places higher demands on the sterile isolation of the probe. The existing isolation sleeve for the ultrasonic probe adopts a film bag or a disposable sleeve structure, is usually fixed by means of adhesive tapes, rubber bands or simple bands, has complicated installation steps, and is easy to cause the problems of unstable fixation, slipping or local wrinkle accumulation in actual operation, thereby affecting the ultrasonic imaging quality and even increasing the risk of cross infection. In addition, frequent replacement of the probe isolating sleeve can increase the operation burden of medical staff, which is unfavorable for efficient and orderly operation of the dialysis room. In summary, the related internal fistula puncture instrument and system still have at least the following defects that firstly, the internal needle is withdrawn by manual operation after successful puncture, the needle point exposure time is long, the needle penetration risk is high, secondly, the reliable mechanism design capable of automatically and rapidly realizing the internal needle isolation after the puncture is finished is lacking, thirdly, the probe isolation mode in the ultrasonic guided puncture process is not stable enough, the operation flow is complex, and the sterile requirement and the operation efficiency are difficult to be considered. Accordingly, the present invention provides an anti-needlestick trocar for internal fistula puncture and a system thereof for solving the above-mentioned problems. Disclosure of Invention The invention aims to solve the problems of the prior art in the background art and provides an anti-needling trocar for internal fistula puncture and a system thereof. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides an internal fistula puncture is with preventing acupuncture trocar, includes kick-back type nook closing member, kick-back typ