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CN-122005024-A - CT guided puncture biopsy operation body surface calibrator

CN122005024ACN 122005024 ACN122005024 ACN 122005024ACN-122005024-A

Abstract

The invention discloses a body surface calibrator for a puncture biopsy under CT guidance, which comprises a calibration ruler and a catheter, wherein the calibration ruler comprises two support bars which are arranged in parallel and made of plastic materials, and a plurality of metal rods which are arranged between the two support bars at equal intervals, the middle part of one or more metal rods is movably connected with an angle regulator, and the catheter is arranged on the angle regulator and used for guiding a puncture needle. The puncture device can improve the smoothness and success rate of puncture operation, can be reused, has lower equipment cost and is worth to be greatly popularized.

Inventors

  • LIU LINA
  • QIU XINGDONG
  • JIN YONGXI

Assignees

  • 温州市中医院

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. The body surface calibrator for the aspiration biopsy under CT guidance is characterized by comprising a calibration ruler (1) and a guide pipe (2), wherein the calibration ruler (1) comprises two support bars (3) which are arranged in parallel and made of plastic materials, and a plurality of metal rods (4) which are arranged between the two support bars (3) at equal intervals, the middle part of one or more metal rods (4) is movably connected with an angle regulator (5), and the guide pipe (2) is arranged on the angle regulator (5) and is used for guiding a puncture needle.
  2. 2. The CT guided biopsy operation body surface calibrator according to claim 1, wherein the angle adjuster (5) comprises a fixed base (6), a positioning pressing sleeve (7), a supporting ring (8) and a movable ball head (9), the fixed base (6) is of a hollow structure with two open ends, the fixed base (6) is connected to a metal rod (4), the supporting ring (8) is installed in the fixed base (6), the positioning pressing sleeve (7) is installed outside the fixed base (6), a limiting flange (10) extending towards the inner periphery is arranged at the upper end of the positioning pressing sleeve (7), a flaring (11) with the outer size and the inner size is arranged at the upper end of the limiting flange (10), a movable cavity (12) is formed between the limiting flange (10) and the supporting ring (8), the movable ball head (9) is arranged in the movable cavity (12) in a rolling mode, a yielding part (13) is further arranged at the lower end of the movable ball head (9), and a guide hole (14) is arranged in the middle of the movable ball head (9) in a penetrating mode vertically and is used for being inserted into a guide hole (2).
  3. 3. The CT guided puncture biopsy body surface calibrator as set forth in claim 2, wherein the lower end of the limit flange (10) is provided with a first conical concave surface (15) which is matched with the shape of the movable ball head (9), and the upper end of the support ring (8) is provided with a second conical concave surface (16) which is matched with the shape of the movable ball head (9).
  4. 4. The CT guided puncture biopsy body surface calibrator according to claim 2, wherein the support ring (8) is screwed into the fixed base (6), and an inner hexagonal operation groove (17) is formed in the bottom of the support ring (8), and the inner hexagonal operation groove (17) is coaxial with the fixed base (6).
  5. 5. The CT guided biopsy needle surface calibrator as claimed in claim 2, wherein a plurality of locking projections (18) are arranged on the outer circular surface of the fixing base (6), a plurality of locking grooves (19) which are equivalent to the locking projections (18) in number and are used for sliding in the corresponding locking projections (18) are arranged on the inner circular surface of the positioning pressing sleeve (7), the locking grooves (19) comprise an inlet and outlet (20) which extends upwards from the lower end of the fixing base (6), and an arc-shaped sliding groove (21) which extends along the circumferential direction from the upper end of the inlet and outlet (20), the angle regulator (5) further comprises a plurality of locking screws (22), locking posts (23) are coaxially arranged at the ends of the locking screws (22), a plurality of screw holes (24) are formed in the outer circular surface of the positioning pressing sleeve (7), the screw holes (24) are communicated with one ends of the corresponding arc-shaped sliding grooves (21) far away from the screw holes, positioning round holes (25) are formed in the locking projections (18), the locking screws (22) are connected with corresponding locking screws (24) in a thread mode, and locking screws (22) are inserted into the corresponding locking holes (25) of the locking projections (23).
  6. 6. The CT-guided biopsy-instrument body surface calibrator according to claim 2, wherein the angle adjuster (5) further comprises an angle locking ring (26) and a plurality of groups of elastic members (27), the angle locking ring (26) is rotatably arranged on the outer circumferential surface of the fixed base (6), a plurality of insertion holes (28) corresponding to the elastic members (27) are distributed on the circumferential side of the fixed base (6), the insertion holes (28) are communicated with the movable cavity (12), the elastic members (27) comprise locking ejector pins (29), return springs (30) and balls (31), the locking ejector pins (29) are axially slidably arranged in the corresponding insertion holes (28), guide flanges (32) are arranged on the periphery of the locking ejector pins (29), limit steps (33) are arranged on the inner wall of the insertion holes (28) close to the inner ends of the guide flanges (32), two ends of the return springs (30) are respectively abutted with the guide flanges (32) and the limit steps (31), the number of the balls (31) are arranged between the locking ejector pins (26) and the corresponding angle locking ring (26) are arranged on the inner circumferential surface of the locking ejector pins (27), the ball (31) outer end part is in rolling fit with the linkage groove (34), the linkage groove (34) comprises a separation state groove (35) and a locking state groove (36) which are arranged along the circumferential direction, the depth of the separation state groove (35) is larger than that of the locking state groove (36), the separation state groove (35) and the locking state groove (36) are connected through a chute (37), when the angle locking ring (26) is rotated, when the ball (31) outer end part is positioned in the separation state groove (35), the locking thimble (29) is separated from the surface of the movable ball head (9) under the action of the reset spring (30), and when the ball (31) outer end part is positioned in the locking state groove (36), the ball (31) pushes the locking thimble (29) to slide inwards, so that the inner end of the locking thimble (29) abuts against the surface of the movable ball head (9).
  7. 7. The CT guided puncture biopsy body surface calibrator as set forth in claim 6, wherein the outer circumferential surface of the fixed base (6) is provided with a supporting step (38) for abutting against the lower end surface of the angle locking ring (26), and the outer circumferential surface of the fixed base (6) is also clamped with a clamp spring (39) for abutting against the upper end surface of the angle locking ring (26).
  8. 8. The CT guided biopsy needle surface calibrator as set forth in claim 7, wherein a plurality of arc track grooves (40) are circumferentially arranged at the upper end of the supporting step (38), a plurality of hemispherical positioning protrusions (41) which form sliding fit with the corresponding arc track grooves (40) are arranged at the lower end of the angle locking ring (26), the radius of each positioning protrusion (41) is larger than the depth of each arc track groove (40), a separation position positioning groove (42) and a locking position positioning groove (43) which are equivalent to each positioning protrusion (41) in shape are respectively arranged at two ends of each arc track groove (40), when the angle locking ring (26) is rotated, the outer end part of each ball (31) is located in the separation position positioning groove (42), and when the outer end part of each ball (31) is located in the locking position groove (36), the positioning protrusions (41) are matched with the locking position positioning grooves (43).
  9. 9. The CT guided biopsy needle body surface calibrator as claimed in claim 2, wherein the upper end of the movable ball head (9) is provided with an extension sleeve (44), the outer diameter of the extension sleeve (44) is smaller than the inner diameter of the extension sleeve (44), the upper end of the extension sleeve (44) is provided with a thread section (45), a plurality of separation grooves (46) are distributed at the upper end of the thread section (45) in a circumferential array, a plurality of elastic claws (47) are formed at the position, a tightening nut (48) is connected to the outer periphery of the thread section (45) in a threaded manner, a pressing flange (49) is arranged on the inner circular surface at the upper end of the tightening nut (48), the lower end of the pressing flange (49) is in a conical surface shape, and when the tightening nut (48) is screwed, the pressing flange (49) of the tightening nut (48) acts on the plurality of elastic claws (47) to enable the plurality of elastic claws (47) to deform inwards and clamp the catheter (2).
  10. 10. The CT guided biopsy operation body surface calibrator according to claim 2, wherein the metal rod (4) connected with the angle adjuster (5) comprises two connecting rods (50), two screw sleeves (51) are respectively arranged on two sides of the fixed base (6), a connecting sleeve (52) is arranged on the supporting bar (3), one end of each connecting rod (50) is in threaded connection with the screw sleeve (51), a locknut (53) is further in threaded connection with the periphery of each connecting rod (50), the locknut (53) abuts against the end part of the screw sleeve (51), the other end of each connecting rod (50) is inserted into the corresponding connecting sleeve (52), and a plurality of pressing raised strips (54) abutting against the outer circular surface of each connecting rod (50) are arranged on the inner circular surface of each connecting sleeve (52).

Description

CT guided puncture biopsy operation body surface calibrator Technical Field The invention relates to the technical field of medical auxiliary instruments, in particular to a body surface calibrator for a puncture biopsy under CT guidance. Background The biopsy puncture needle is a medical instrument suitable for sampling the living tissues of solid tumors of various organs such as kidney, liver, lung, mammary gland, thyroid gland, prostate gland, pancreas, testis, uterus, ovary, body surface and the like, and is widely used in pathological detection of various tumors. Percutaneous aspiration biopsy under CT guidance can effectively improve diagnosis accuracy and determine tissue sources of lesions. The biopsy puncture needle is generally composed of a needle seat, a core needle, an inner needle tube, an inner needle positioning sheath, an outer needle tube and a protective sleeve. The needle tube is generally made of stainless steel materials. The traditional percutaneous biopsy puncture operation needs to mark a puncture point by a marker pen under the indication of a CT cursor, conventional disinfection and towel spreading are performed, after local anesthesia, a puncture needle enters subcutaneous backward CT scanning, after the relation between a needle insertion angle and a focus is intuitively determined, the puncture needle is inserted into a target point according to the estimated needle insertion angle and depth, then CT scanning is performed on a target layer surface, the needle point is confirmed to be positioned in the focus, and then negative pressure suction or biopsy gun shooting is performed to take out sample tissues. The judgment mode of the needle insertion angle is completely dependent on manual operation of a doctor, and errors are easily caused by subjective factors such as proficiency of an operator, so that repeated puncture and repeated CT scanning are caused, damage is caused to tissues, CT ray exposure dose of a patient is increased, and emotion of the patient is influenced. Therefore, it is necessary to develop a body surface marker for a needle biopsy under CT guidance to assist a doctor in performing a needle operation, so as to improve the smoothness and success rate of the needle operation. Disclosure of Invention The invention aims to provide a body surface calibrator for a puncture biopsy operation under CT guidance, which can improve the smoothness and success rate of the puncture operation, can be reused, has lower equipment cost and is worthy of great popularization. The body surface calibrator for the aspiration biopsy under CT guidance comprises a calibration ruler and a catheter, wherein the calibration ruler comprises two supporting bars which are arranged in parallel and made of plastic materials, and a plurality of metal rods which are arranged between the two supporting bars at equal intervals, the middle part of one or more metal rods is movably connected with an angle regulator, and the catheter is arranged on the angle regulator and used for guiding a puncture needle. Through adopting above-mentioned technical scheme, adhere two support bars of this calibrator through the adhesive tape in patient's body surface, under the CT shines, a plurality of metal support bars present a plurality of developing points, the pipe passes through the angle regulator and installs on the metal stick, but the angle is adjusted in arbitrary direction swing of pipe, under the CT shines, after the pipe is aimed at the tumour position, insert patient's tissue through the pipe again with biopsy pjncture needle and carry out the tissue sampling, can avoid repeated puncture through this calibrator, promote the smoothness and the success rate of puncture operation greatly, prevent to cause great damage to patient's tissue, but and repeatedly usable after this calibrator disinfects, equipment expense is also lower, be worth carrying out powerful popularization. The angle adjuster is further arranged in the invention, the angle adjuster comprises a fixed base, a positioning pressing sleeve, a supporting ring and a movable ball head, wherein the fixed base is of a hollow structure with openings at two ends, the fixed base is connected to a metal rod, the supporting ring is arranged in the fixed base, the positioning pressing sleeve is arranged outside the fixed base, a limiting flange extending towards the inner periphery is arranged at the upper end of the positioning pressing sleeve, a flaring with a large outside and a small inside is arranged at the upper end of the limiting flange, a movable cavity is formed between the limiting flange and the supporting ring, the movable ball head is arranged in the movable cavity in a rolling mode, a yielding cutting part is further arranged at the lower end of the movable ball head, and a guide hole for guiding pipe insertion is vertically and penetratingly arranged in the middle of the movable ball head. Through adopting above-mentioned technical s