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CN-122006065-A - Dynamic stiffness adjustable guide catheter based on temperature response memory alloy

CN122006065ACN 122006065 ACN122006065 ACN 122006065ACN-122006065-A

Abstract

The invention discloses a dynamic stiffness adjustable guide catheter based on a temperature response memory alloy, which relates to the technical field of medical instruments and comprises a main body pipe and a tube seat, wherein the main body pipe is arranged on the right side of the outer wall of the tube seat and consists of a pushing pipe, a steering pipe and a fitting pipe, the pushing pipe, the steering pipe and the fitting pipe are all composed of an outer pipe and an inner pipe, the pushing pipe, the fitting pipe and the steering pipe are connected through a linkage shaft, a sliding ring is arranged in an interlayer formed by the outer pipe and the inner pipe, and one side, close to the inner pipe, of the outer wall of the sliding ring is provided with an elastic sheet. According to the invention, the main body pipe, the linkage shaft and the pipe seat are arranged, so that the function of automatically adjusting the rigidity in a segmented way is realized, the problems of dependence on manual rigidity adjustment, insufficient support of the catheter and poor flexibility are solved, the rigidity of the catheter can be automatically adjusted according to the temperature, the stability and the reliability of the guiding catheter are improved, and the operation complexity of medical staff is reduced.

Inventors

  • WANG YIGANG
  • GUI HONG
  • LIU ZHICUN
  • LI XIAODONG

Assignees

  • 东莞市迪凯医疗科技有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. The dynamic stiffness adjustable guide catheter based on the temperature response memory alloy is characterized by comprising a main body pipe (1) and a pipe seat (2), wherein the main body pipe (1) is arranged on the right side of the outer wall of the pipe seat (2), the main body pipe (1) is composed of a pushing pipe (3), a steering pipe (4) and a jointing pipe (5), the pushing pipe (3), the steering pipe (4) and the jointing pipe (5) are composed of an outer pipe (6) and an inner pipe (7), the pushing pipe (3) and the jointing pipe (5) are connected with the steering pipe (4) through a linkage shaft (8), a sliding ring (9) is arranged in an interlayer formed by the outer pipe (6) and the inner pipe (7), a spring piece (10) is arranged on one side, close to the inner pipe (7), of the outer wall of the sliding ring (9), of the inner pipe (7) is composed of a 4-piece lining piece (11), a supporting piece (12) is arranged on one side, close to the outer wall of the outer pipe (6), of the lining piece (11) and the connecting piece (11) is connected with the outer pipe (6) through a hinge (13) and a hinge (13) on one side, close to the lining piece (13), a connecting edge (14) is arranged on one side, away from the outer tube (6), of the outer wall of the lining sheet (11).
  2. 2. The guide catheter with adjustable dynamic rigidity based on temperature response memory alloy according to claim 1, wherein the sliding ring (9) consists of a sleeve (15), an outer sliding block (16), locking teeth (17) and a joint (18), the sleeve (15) is arranged on one side, close to the outer tube (6), of the outer wall of the elastic piece (10), the locking teeth (17) are arranged on one side, close to the elastic piece (10), of the outer wall of the sleeve (15), the outer sliding block (16) and the joint (18) are arranged on one side, close to the outer tube (6), of the outer wall of the sleeve (15) in a staggered manner, and the outer sliding block (16) is matched with a sliding groove (19) arranged on one side, close to the sliding ring (9), of the inner wall of the outer tube (6).
  3. 3. The guide catheter with adjustable dynamic rigidity based on temperature response memory alloy according to claim 2, wherein the outer tube (6) is composed of a woven mesh tube (20), positioning tables (21) are arranged at the left end and the right end of the outer wall of the woven mesh tube (20), an adjusting tube I (22) is arranged on the inner wall of the outer tube (6), the weaving densities of the woven mesh tube (20) of the pushing tube (3), the steering tube (4) and the attaching tube (5) are sequentially decreased, and the weaving angles of the outer tube (6) of the pushing tube (3), the steering tube (4) and the attaching tube (5) are sequentially increased.
  4. 4. The guide catheter with adjustable dynamic stiffness based on the temperature response memory alloy according to claim 3, wherein a traction wire (23) is arranged in the first adjusting tube (22), the wire diameter of the traction wire (23) in the pushing tube (3) is 0.18-0.2mm, the wire diameter of the traction wire (23) in the steering tube (4) is 0.15-0.17mm, the wire diameter of the traction wire (23) in the attaching tube (5) is 0.12-0.14mmm, a knob (24) is arranged on the outer wall of the tube seat (2), a scale is arranged on the front side of the outer wall of the knob (24) close to the outer wall of the tube seat (2), and the knob (24) is connected with the joint (18) through the traction wire (23).
  5. 5. The guide catheter with adjustable dynamic rigidity based on temperature response memory alloy according to claim 4, wherein an anti-folding tube (25) is arranged at the joint of the main body tube (1) and the tube seat (2), the anti-folding tube (25) consists of a sheath (26), a second supporting ring (27), a spacer bush (28), a supporting ring (29) and a sealing ring (30), the sheath (26) is arranged on the right side of the outer wall of the tube seat (2), the spacer bush (28) is arranged on the inner wall of the sheath (26), the second supporting tube (27) is arranged in an interlayer formed by the sheath (26) and the spacer bush (28), the second supporting tube (27) is connected with the first supporting tube (22), the supporting ring (29) is arranged on the side, far away from the sheath (26), of the outer wall of the supporting ring (29), and the sealing ring (30) is arranged on the side, far away from the spacer bush (28).
  6. 6. The guide catheter with adjustable dynamic stiffness based on temperature response memory alloy as claimed in claim 5, wherein limiting blocks (31) are arranged on the left side and the right side of the outer wall of the knob (24), a first buckle (32) is arranged on the lower side of the outer wall of the tube seat (2), and a sealing cover (33) is arranged at the joint of the tube seat (2) and the anti-bending tube (25).
  7. 7. The guide catheter with adjustable dynamic rigidity based on temperature response memory alloy as claimed in claim 1, wherein a head cap (34) is arranged on one side, far away from the steering tube (4), of the outer wall of the attaching tube (5), a developing ring (35) is embedded on the right side of the inner wall of the head cap (34), a supporting core (36) is arranged on the left side of the outer wall of the developing ring (35), and the head cap (34) is connected with the attaching tube (5) through the supporting core (36).
  8. 8. The guide catheter with adjustable dynamic rigidity based on temperature response memory alloy according to claim 1, wherein the outer wall of the inner tube (7) is provided with a coating (37) at the side far away from the outer tube (6).
  9. 9. The guide catheter with adjustable dynamic stiffness based on temperature response memory alloy as claimed in claim 2, wherein the outer wall of the elastic sheet (10) is provided with a second buckle (38) close to the locking tooth (17), and the second buckle (38) is meshed with the locking tooth (17).
  10. 10. The guide catheter with adjustable dynamic stiffness based on temperature response memory alloy as claimed in claim 4, wherein the inner wall of the first adjusting tube (22) is provided with a guide groove (39), the traction wire (23) is attached to the guide groove (39), and the guide groove (39) is parallel to the sliding groove (19).

Description

Dynamic stiffness adjustable guide catheter based on temperature response memory alloy Technical Field The invention relates to the technical field of medical instruments, in particular to a dynamic stiffness adjustable guide catheter based on temperature response memory alloy. Background The guiding catheter is specially used for establishing a vascular passageway, provides channels for therapeutic instruments such as balloon catheters, stents, guide wires and the like to enter coronary arteries and peripheral blood vessels, ensures accurate transportation of the instruments to a lesion site, converts materials of the guiding catheter from an early single-layer polymer into a three-layer composite structure of a polytetrafluoroethylene inner layer, a stainless steel woven middle layer and a high polymer outer layer, improves pushing force and torsion controllability of the guiding catheter, dynamically adapts to requirements of vascular anatomy complexity, and dynamically adjusts rigidity of the guiding catheter, for example, by combining a rigid magnetic spiral structure with a flexible microcosmic structure, and realizes remote nondestructive rigidity adjustment and independent control of active steering of the microcatheter under a single magnetic field; The existing guide catheter is made of non-temperature-responsive materials, such as common metal or polymer, cannot automatically adjust performance according to body temperature, relies on manual operation or fixation design of medical staff, increases operation complexity of the medical staff in an operation process, and the guide catheter with the fixation stiffness design is easy to scratch a vascular intima at a high-stiffness section and is pressed and collapsed by a vascular wall in the operation process, so that operation faults are caused. Patent CN114082086B discloses a balloon guiding catheter, which reduces the difficulty and complexity of the operation during surgery and reduces the time and risk of the surgery. According to the patent, the first balloon made of the non-compliant material is sleeved in the second sleeve made of the compliant material, the developing solution is pre-stored in the second balloon, when the catheter passes through a vascular stenosis, the first balloon expands the stenosis, the second balloon is extruded to expand along with the first balloon, the second balloon is utilized to represent the expansion effect of pathological change stenosis, the catheter can be smoothly pushed, the puncture risk of the first balloon can be reduced, and an optimization space exists in the rigidity adjustment controllability of the guiding catheter. Therefore, the application provides a dynamic stiffness adjustable guide catheter based on temperature response memory alloy, which is capable of automatically adjusting stiffness in a segmented way. Disclosure of Invention The invention aims to provide a dynamic stiffness adjustable guide catheter based on temperature response memory alloy, so as to solve the technical problem that the guide catheter which is provided in the background art and is single in fixed parameter or depends on manual adjustment cannot be adapted to dynamic vascular environment. The dynamic stiffness adjustable guide catheter based on the temperature response memory alloy comprises a main body pipe and a pipe seat, wherein the main body pipe is arranged on the right side of the outer wall of the pipe seat and consists of a pushing pipe, a steering pipe and a jointing pipe, the pushing pipe, the steering pipe and the jointing pipe consist of an outer pipe and an inner pipe, the pushing pipe and the jointing pipe are connected with the steering pipe through a linkage shaft, a sliding ring is arranged in an interlayer formed by the outer pipe and the inner pipe, a spring piece is arranged on one side, close to the inner pipe, of the outer wall of the sliding ring, the inner pipe consists of a 4-piece bushing piece, a first supporting piece is arranged on one side, close to the outer pipe, of the outer wall of the bushing piece, the bushing piece is connected with the bushing piece through a hinge and a connecting edge, and a hinge is arranged on one side, close to the outer wall of the bushing piece, close to the outer pipe, and a connecting edge is arranged on one side, close to the outer pipe. Preferably, the sliding ring consists of a sleeve, an outer sliding block, locking teeth and a joint, the sleeve is arranged on one side of the outer wall of the elastic sheet, which is close to the outer tube, the locking teeth are arranged on one side of the outer wall of the sleeve, which is close to the elastic sheet, the outer wall of the sleeve is staggered at one side close to the outer tube is provided with an outer sliding block and a joint, is provided with an outer part a sliding block and a joint are arranged on the sliding block. Preferably, the outer tube is composed of a woven mesh tube, positioning tables