CN113181517B - Micro-catheter with mixed spring winding structure - Google Patents

Micro-catheter with mixed spring winding structure Download PDF

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Publication number
CN113181517B
CN113181517B CN202110438873.0A CN202110438873A CN113181517B CN 113181517 B CN113181517 B CN 113181517B CN 202110438873 A CN202110438873 A CN 202110438873A CN 113181517 B CN113181517 B CN 113181517B
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pipe
head end
wall
tube
block
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CN113181517A (en
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王浩
马明祥
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Pugao Medical Technology Nanjing Co ltd
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Pugao Medical Technology Nanjing Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/109—Balloon catheters with special features or adapted for special applications having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Child & Adolescent Psychology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention belongs to the technical field of micro catheters, in particular to a micro catheter with a mixed spring winding structure, and provides a scheme for solving the problems in the prior art. The invention can simultaneously have the performances of two reinforced structures, including excellent plasticity, flexibility and support property, so as to meet the use requirement of the microcatheter in the operation process, prevent the balloon catheter from generating straightening stress during the flow guide, further improve the flexibility of the catheter body during the flow guide, prevent thrombus from entering the inside of the catheter body and facilitate the cleaning of the catheter body.

Description

Micro-catheter with mixed spring winding structure
Technical Field
The invention relates to the technical field of micro catheters, in particular to a micro catheter with a mixed spring winding structure.
Background
Thrombi are small pieces formed on the surface of denuded or repaired sites inside the blood vasculature, and in the variable fluid-dependent type, thrombi are composed of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells, and are a multifactorial process of interaction and interplay of a group of genetic and environmental factors, and clinically common patients with thrombi are characterized by familial inheritance, recurrent episodes, symptom severity, abnormality of the site of thrombosis, and younger onset time.
When the existing medical technology is used for treating thrombus, a microcatheter is sometimes used, the thrombus is led into a thrombus taking support through the microcatheter, and then the thrombus is led out through the thrombus taking support, the existing microcatheter usually adopts a single wound spring structure or a single woven structure as a reinforcing mechanism, and then the existing microcatheter cannot be compatible with certain performance reinforcement, such as flexibility, support performance and the like.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a micro catheter with a mixed spring winding structure.
The invention provides a micro catheter with a mixed spring winding structure, which comprises a catheter body, wherein one end of the catheter body is provided with a head end pipe, the other end of the catheter body is provided with an operating mechanism, the catheter body comprises a catheter body inner pipe, the outer surface of the catheter body inner pipe is sleeved with a balloon catheter, the outer surface of the balloon catheter is provided with a reinforcing unit, the reinforcing unit comprises a second stainless steel wire and a second nickel titanium wire which are spirally wound on the outer wall of the balloon catheter in parallel, the second stainless steel wire and the second nickel titanium wire enable the balloon catheter to form a spiral flow guide cavity, the outer wall of the balloon catheter is wrapped with a catheter body outer pipe, a connecting mechanism is arranged between the catheter body and the head end pipe, and a balloon communicated with the balloon catheter is arranged on one side of the outer wall of the catheter body, close to the head end pipe.
Preferably, the head end pipe includes the head end inner tube, and the side outer wall of head end inner tube is around rolling up there are parallel first stainless steel wire and first nickel titanium silk, and the outside cladding of head end inner tube has the head end skin.
Preferably, the first stainless steel wire and the first nickel titanium wire form a spiral bulge on the outer wall of the head end outer layer.
Preferably, one end of the head end pipe, which is far away from the pipe body, is provided with a head end part, the head end part is of a circular truncated cone structure, one side of the outer wall of the side surface of the pipe body, which is close to the balloon, is provided with a back radiography mark, and the outer wall of the side surface of the head end part is provided with a front radiography mark.
Preferably, coupling mechanism connects and sets up the joint in body one side including setting up in the head end of head end pipe one side, coupling mechanism still includes the conical duct, and the great open-ended one end of conical duct is provided with interior sleeve pipe, the outer diameter looks adaptation of interior sheathed tube internal diameter and joint, the inner diameter looks adaptation of interior sheathed tube external diameter and head end joint.
Preferably, the operating mechanism comprises a connecting pipe, the connecting pipe and the pipe body are detachable, a detachable introducing pipe is arranged at the other end of the connecting pipe, and a luer connector communicated with the balloon catheter is arranged on the side face of the introducing pipe.
Preferably, one end of the inlet pipe is provided with an end block, and the inside of the end block is provided with a round hole communicated with the inlet pipe.
Preferably, the outer wall of the side surface of the end block close to one side of the inlet pipe is provided with two clamping blocks matched with the annular bulge of the inlet pipe, the outer wall of the side surface of the end block at one side of the clamping blocks is provided with a clamping block groove, the outer wall of the side surface of each clamping block is fixedly connected with a pressing plate in sliding connection with the inner wall of the side surface of the clamping block groove, and the outer wall of the side surface of each pressing plate is fixedly connected with a first spring.
Preferably, the inner walls of the two sides of the round hole are both provided with sliding grooves, the inner walls of the side faces of the sliding grooves are both connected with sliding blocks in a sliding mode, the sliding blocks are provided with shifting block grooves towards the outer wall of the side face of the outer side of the end block, the inner walls of the side faces of the shifting block grooves are connected with shifting blocks in a sliding mode, a second spring is fixedly connected between one end of each shifting block and the inner wall of the side face of each shifting block groove, and one side, towards the shifting block grooves, of each shifting block is connected with a pressing block located inside the round hole through a connecting rod.
The beneficial effects of the invention are as follows:
1. through setting up stainless steel wire and nickel titanium wire, stainless steel wire has excellent plasticity, and the nickel titanium wire has excellent compliance and support nature, can have the performance that two kinds of reinforcing structures have simultaneously in this little pipe, including excellent plasticity, compliance, support nature to satisfy the user demand to little pipe in the operation process.
2. Through setting up the sacculus pipe in the inside of second stainless steel wire and second nickel titanium silk, can make the sacculus pipe produce spiral water conservancy diversion chamber through second stainless steel wire and second nickel titanium silk, and then can prevent that the sacculus pipe from producing the stress of straightening when the water conservancy diversion, and then can improve the compliance of body when the water conservancy diversion.
3. Through setting up the conical duct, set up detachable conical duct between nose portion and body, when getting the thrombus support and driving the thrombus and pull out, the thrombus can drop under the effect of conical duct when moving to conical duct one side, and then can prevent that the thrombus from entering into inside the body, has made things convenient for the clearance to the body.
4. Through setting up end block, set up detachable end block in one side of induction pipe, when bent bolt support can pass through the round hole in the end block when entering into the body, when the user when pulling thrombus support and need carry out little operation, press the shifting block and can make the briquetting press the outer wall at bent bolt support, and then can carry out short distance push-and-pull to thrombus support through stirring the shifting block, made things convenient for the little operation to thrombus support.
Drawings
FIG. 1 is a schematic view of the overall structure of a microcatheter with a hybrid coiled spring structure according to the present invention;
FIG. 2 is a partial cross-sectional view of a catheter body with a hybrid coiled spring structure according to the present invention;
FIG. 3 is a partial cross-sectional view of a tip structure of a microcatheter having a hybrid coiled spring structure according to the present invention;
FIG. 4 is a schematic view of the internal structure of an end block of a microcatheter of the present invention having a hybrid coiled spring structure;
FIG. 5 is a schematic view of a connection mechanism of a microcatheter with a hybrid coiled spring structure according to the present invention.
In the figure: the device comprises a pipe body 1, a connecting pipe 2, an introducing pipe 3, a luer connector 4, a shifting block 5, a sliding groove 6, an end block 7, a clamping block 8, a head end part 9, a front imaging mark 10, a spiral protrusion 11, a head end pipe 12, a balloon 13, a first stainless steel wire 14, a first nickel-titanium wire 15, a head end inner pipe 16, a head end outer layer 17, a joint 18, an inner sleeve 19, a conical pipe 20, a head end joint 21, a body inner pipe 22, a balloon catheter 23, a second stainless steel wire 24, a body outer pipe 25, a second nickel-titanium wire 26, an outer coating 27, an inner coating 28, a sliding block 29, a pressing block 30, a pressing block groove 31, a pressing plate 32, a first spring 33, a shifting block groove 34, a connecting rod 35, a second spring 36 and a rear imaging mark 37.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1 to 5, a microcatheter with a hybrid spring-wound structure comprises a tube body 1, a head end tube 12 is disposed at one end of the tube body 1, and an operating mechanism is disposed at the other end of the tube body 1, the tube body 1 comprises a tube body inner tube 22, a balloon catheter 23 is sleeved on the outer surface of the tube body inner tube 22, a reinforcing unit is disposed on the outer surface of the balloon catheter 23, the reinforcing unit comprises a second stainless steel wire 24 and a second nickel-titanium wire 26 which are spirally wound on the outer wall of the balloon catheter 23, the head end tube 12 comprises a head end inner tube 16, a first stainless steel wire 14 and a first nickel-titanium wire 15 which are wound on the side outer wall of the head end inner tube 16, and a head end outer layer 17 is coated on the outer side of the head end inner tube 16, wherein the stainless steel wire has excellent plasticity, the nickel-titanium wire can enhance the flexibility and the support of the microcatheter, so that the microcatheter can have the performance of two reinforcing structures, including excellent plasticity, the compliance, the support nature, in order to satisfy the user demand to little pipe in the operation process, second stainless steel wire 24 and second nickel titanium wire 26 make sacculus pipe 23 form spiral helicine water conservancy diversion chamber, spiral water conservancy diversion chamber can not make the surface of body 1 produce the stress that straightens when carrying out the water conservancy diversion, and then can improve the compliance of body 1 when the water conservancy diversion, the outer wall cladding of sacculus pipe 23 has body outer tube 25, be provided with coupling mechanism between body 1 and the head end pipe 12, coupling mechanism makes and can dismantle between body 1 and the head end pipe 12, and one side that body 1 side outer wall is close to head end pipe 12 is provided with the communicating sacculus 13 with sacculus pipe 23.
Wherein, the first stainless steel wire 14 and the first nickel titanium wire 15 make the outer wall of the head end outer layer 17 form a spiral protrusion 11, and the spiral protrusion 11 can improve the drilling performance of the micro-catheter in use.
Wherein, the head end portion 9 is arranged at one end of the head end tube 12 far away from the tube body 1, the head end portion 9 is of a circular truncated cone structure, a back radiography mark 37 is arranged at one side of the outer wall of the side surface of the tube body 1 close to the balloon 13, a front radiography mark 10 is arranged at the outer wall of the side surface of the head end portion 9, and the position of the micro-catheter can be accurately positioned through the front radiography mark 10 and the back radiography mark 37.
Wherein, coupling mechanism connects 21 and sets up in the joint 18 of body 1 one side including the head end that sets up in head end pipe 12 one side, coupling mechanism still includes conical tube 20, and the great open-ended one end of conical tube 20 is provided with interior sleeve pipe 19, the internal diameter of interior sleeve pipe 19 and the external diameter looks adaptation that connects 18, the external diameter of interior sleeve pipe 19 and the internal diameter looks adaptation of head end joint 21, when getting the thrombus support and driving the thrombus and pull out, can drop under conical tube 20's effect when thrombus motion to conical tube 20 one side, and then can prevent that the thrombus from entering into inside the body 1, the clearance to body 1 has been made things convenient for.
The operating mechanism comprises a connecting pipe 2, the connecting pipe 2 and the pipe body 1 are detachable, the other end of the connecting pipe 2 is provided with a detachable guide-in pipe 3, and the side face of the guide-in pipe 3 is provided with a Ruhr joint 4 communicated with the balloon catheter 23.
Example 2
Referring to fig. 4, in the present embodiment, compared to embodiment 1, an end block 7 is disposed at one end of an inlet tube 3, a circular hole communicating with the inlet tube 3 is disposed inside the end block 7, two locking blocks 8 adapted to an annular protrusion of the inlet tube 3 are disposed on an outer side wall of the end block 7 near the inlet tube 3, a locking block groove 31 is formed on an outer side wall of the end block 7 at one side of the locking block 8, a pressing plate 32 slidably connected to an inner side wall of the locking block groove 31 is fixedly connected to an outer side wall of the locking block 8, a first spring 33 is fixedly connected between the outer side wall of the pressing plate 32 and the inner side wall of the locking block groove 31, sliding grooves 6 are formed on inner side walls of the circular holes, sliding blocks 29 are slidably connected to inner side walls of the sliding grooves 6, a dial block groove 34 is formed on an outer side wall of the sliding block 29 facing the outside of the end block 7, and a dial block 5 is slidably connected to an inner side wall of the dial block groove 34, a second spring 36 is fixedly connected between one end of the shifting block 5 and the inner wall of the side surface of the shifting block groove 34, and one side, facing the shifting block groove 34, of the shifting block 5 is connected with a pressing block 30 positioned in the circular hole through a connecting rod 35.
When the invention is used: compare with embodiment 1, can pass through the round hole in end block 7 when bent bolt support enters into body 1, when the user is at the pulling thrombus support and when needing to carry out the micro-operation, press the shifting block 5 and can make briquetting 30 press at the outer wall of bent bolt support, and then can carry out short distance's push-and-pull to the thrombus support through stirring shifting block 5.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. The utility model provides a little pipe with mix around spring structure, includes body (1), its characterized in that, the one end of body (1) is provided with head end pipe (12), and the other end of body (1) is provided with operating device, body (1) includes body inner tube (22), and sacculus pipe (23) have been cup jointed to the surface of body inner tube (22), and the surface of sacculus pipe (23) is provided with the reinforcing unit, and the reinforcing unit includes that the heliciform is wound in second stainless steel wire (24) and second nickel titanium silk (26) that parallel of sacculus pipe (23) outer wall, and second stainless steel wire (24) and second nickel titanium silk (26) make sacculus pipe (23) form spiral helicine water conservancy diversion chamber, and the outer wall cladding of sacculus pipe (23) has body outer tube (25), be provided with coupling mechanism between body (1) and head end pipe (12), and one side outer wall of body (1) side is close to head end pipe (12) is provided with the communicating ball pipe (23) with sacculus pipe (23) A bladder (13);
the head end pipe (12) comprises a head end inner pipe (16), a first stainless steel wire (14) and a first nickel-titanium wire (15) which are parallel are wound on the outer wall of the side surface of the head end inner pipe (16), and a head end outer layer (17) is coated on the outer side of the head end inner pipe (16);
the first stainless steel wire (14) and the first nickel titanium wire (15) enable the outer wall of the head end outer layer (17) to form a spiral bulge (11).
2. The microcatheter with the mixed spring-winding structure according to claim 1, wherein the end of the head end tube (12) far away from the tube body (1) is provided with a head end portion (9), the head end portion (9) is of a truncated cone structure, the side outer wall of the tube body (1) close to the balloon (13) is provided with a rear imaging mark (37), and the side outer wall of the head end portion (9) is provided with a front imaging mark (10).
3. The microcatheter with the mixed spring winding structure according to claim 1, wherein the connecting mechanism comprises a head end joint (21) arranged at one side of the head end pipe (12) and a joint (18) arranged at one side of the pipe body (1), the connecting mechanism further comprises a tapered pipe (20), an inner sleeve (19) is arranged at one end of the tapered pipe (20) with a larger opening, the inner diameter of the inner sleeve (19) is matched with the outer diameter of the joint (18), and the outer diameter of the inner sleeve (19) is matched with the inner diameter of the head end joint (21).
4. The microcatheter with a mixed spring-winding structure according to claim 1, wherein the operating mechanism comprises a connecting tube (2), the connecting tube (2) is detachable from the tube body (1), the other end of the connecting tube (2) is provided with a detachable introducing tube (3), and the side of the introducing tube (3) is provided with a luer connector (4) communicated with the balloon catheter (23).
5. The microcatheter with hybrid coiled spring structure of claim 4, wherein one end of the inlet tube (3) is provided with an end block (7), and the inside of the end block (7) is provided with a circular hole communicating with the inlet tube (3).
6. The microcatheter with a mixed coiled spring structure according to claim 5, wherein the lateral outer wall of the end block (7) near the side of the inlet tube (3) is provided with two clamping blocks (8) matched with the annular protrusion of the inlet tube (3), and the lateral outer wall of the end block (7) near the side of the clamping blocks (8) is provided with a clamping block groove (31), the lateral outer wall of the clamping blocks (8) is fixedly connected with a clamping plate (32) slidably connected with the lateral inner wall of the clamping block groove (31), and the lateral outer wall of the clamping plate (32) and the lateral inner wall of the clamping block groove (31) are fixedly connected by a first spring (33).
7. The microcatheter with the mixed spring winding structure according to claim 6, wherein the inner walls of both sides of the round hole are both provided with the sliding grooves (6), the inner walls of the side surfaces of the sliding grooves (6) are both connected with the sliding blocks (29) in a sliding manner, the outer walls of the side surfaces of the sliding blocks (29) facing the outer side of the end block (7) are provided with the shifting block grooves (34), the inner walls of the side surfaces of the shifting block grooves (34) are connected with the shifting blocks (5) in a sliding manner, the second springs (36) are fixedly connected between one ends of the shifting blocks (5) and the inner walls of the side surfaces of the shifting block grooves (34), and one side of the shifting block (5) facing the shifting block grooves (34) is connected with the pressing block (30) located inside the round hole through the connecting rod (35).
CN202110438873.0A 2021-04-23 2021-04-23 Micro-catheter with mixed spring winding structure Active CN113181517B (en)

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CN113181517B true CN113181517B (en) 2022-07-08

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2376312Y (en) * 1999-07-09 2000-05-03 张书刚 Saccule-cytoskeletal catheter for percutaneous coronary saccular dilatation
US7905877B1 (en) * 2006-05-12 2011-03-15 Micrus Design Technology, Inc. Double helix reinforced catheter
JP2019520118A (en) * 2016-05-18 2019-07-18 ノルメディクス インコーポレイテッドＮｏｒｍｅｄｉｘ，Ｉｎｃ． Braided catheter assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8257314B2 (en) * 2005-11-16 2012-09-04 Cook Medical Technologies Llc Spiral shaft catheter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2376312Y (en) * 1999-07-09 2000-05-03 张书刚 Saccule-cytoskeletal catheter for percutaneous coronary saccular dilatation
US7905877B1 (en) * 2006-05-12 2011-03-15 Micrus Design Technology, Inc. Double helix reinforced catheter
JP2019520118A (en) * 2016-05-18 2019-07-18 ノルメディクス インコーポレイテッドＮｏｒｍｅｄｉｘ，Ｉｎｃ． Braided catheter assembly

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