CN110840531A - Adjustable bent sheath tube and transjugular intrahepatic puncture system - Google Patents

Adjustable bent sheath tube and transjugular intrahepatic puncture system Download PDF

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Publication number
CN110840531A
CN110840531A CN201911157880.2A CN201911157880A CN110840531A CN 110840531 A CN110840531 A CN 110840531A CN 201911157880 A CN201911157880 A CN 201911157880A CN 110840531 A CN110840531 A CN 110840531A
Authority
CN
China
Prior art keywords
tube
sheath
pipe
steel pipe
adjustable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911157880.2A
Other languages
Chinese (zh)
Inventor
成正辉
彭伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUNAN AIPUTE MEDICAL EQUIPMENT CO Ltd
Original Assignee
HUNAN AIPUTE MEDICAL EQUIPMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUNAN AIPUTE MEDICAL EQUIPMENT CO Ltd filed Critical HUNAN AIPUTE MEDICAL EQUIPMENT CO Ltd
Priority to CN201911157880.2A priority Critical patent/CN110840531A/en
Publication of CN110840531A publication Critical patent/CN110840531A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3403Needle locating or guiding means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3415Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3417Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421Cannulas
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3462Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3403Needle locating or guiding means
    • A61B2017/3405Needle locating or guiding means using mechanical guide means

Abstract

The invention discloses an adjustable bending sheath tube, which comprises a tube body and a joint which are connected, wherein the tube body sequentially comprises an inner tube, a steel tube and an outer tube from inside to outside along the radial direction, the steel tube is provided with a plurality of cutting gaps at intervals along the axial direction, the inner tube is provided with a stay wire cavity and a conveying cavity, a stay wire is arranged in the stay wire cavity, and the head end of the stay wire is fixedly connected with the head end of the steel tube; when the stay wire is tightened, the stay wire drives the steel pipe to bend. The invention also discloses a transjugular intrahepatic puncture system. The bendable sheath tube realizes the change of the bending shape of the steel tube by tensioning or loosening the pull wire, and the bent sheath tube is matched with the actual distribution situation of the blood vessel of a patient, so that the aim of puncturing and conveying instruments more accurately is fulfilled, and the safety and the effectiveness of the operation are improved.

Description

Adjustable bent sheath tube and transjugular intrahepatic puncture system
Technical Field
The invention relates to the technical field of interventional therapy, in particular to an adjustable bent sheath tube. Still relate to a transjugular intrahepatic puncture system.
Background
Transjugular Intrahepatic Portosystemic Shunt (TIPS) is a new interventional treatment technology for treating portal hypertension, namely, a puncture cannula at the jugular vein is inserted into the hepatic vein through the inferior vena cava, the hepatic parenchyma is punctured into the intrahepatic portosystemic vein from the hepatic vein, after the puncture channel is expanded, a metal bracket is placed to establish an effective portosystemic shunt channel, so that the aim of reducing the pressure of the portal vein is fulfilled, and meanwhile, the coronary sclerosis embolization of the stomach can be implemented.
When the hepatic vein is punctured, hepatic vein radiography is often needed to determine the puncturing position and direction, and the angle of the puncturing needle channel at the sagittal position is further determined by combining portal vein radiography if necessary, but the sheath tubes of the existing puncturing system are fixed bent sheath tubes, so that the bent shape cannot be changed according to actual conditions, the difference of blood vessel distribution of different patients cannot be adapted, and extra medical injury is increased while the operation difficulty is increased.
Therefore, how to provide an adjustable curved sheath capable of changing the curved shape according to the actual condition of the blood vessel distribution of a patient is a technical problem to be solved urgently by those skilled in the art, so as to achieve the purpose of puncturing and delivering instruments more accurately and improve the safety and effectiveness of the operation.
Disclosure of Invention
The invention aims to provide an adjustable bent sheath tube, which changes the bending shape of a steel tube by tensioning and releasing a pull wire, and the bent sheath tube is matched with the actual distribution condition of blood vessels of a patient, so that the aim of puncturing and conveying instruments more accurately is fulfilled, and the safety and the effectiveness of the operation are improved. It is another object of the present invention to provide a transjugular intrahepatic puncture system.
In order to achieve the purpose, the invention provides an adjustable bending sheath tube, which comprises a tube body and a joint which are connected, wherein the tube body sequentially comprises an inner tube, a steel tube and an outer tube from inside to outside along the radial direction, the steel tube is provided with a plurality of cutting gaps at intervals along the axial direction, the inner tube is provided with a stay wire cavity and a conveying cavity, a stay wire is arranged in the stay wire cavity, and the head end of the stay wire is fixedly connected with the head end of the steel tube;
when the stay wire is tightened, the stay wire drives the steel pipe to bend.
Preferably, the pull-cord type pipe comprises a pipe body and a pull cord, wherein the pull cord is fixed on the pipe body, and the pull cord is fixed on the pipe body.
Preferably, the width of the cutting gap increases and then decreases from the head end of the steel pipe to the tail end of the steel pipe.
Preferably, the width of the ridge of the steel pipe increases from the head end of the steel pipe to the tail end of the steel pipe.
Preferably, the delivery lumen is located in the lumen of the inner tube and the pull wire lumen is located in the wall of the inner tube.
Preferably, the head end of the steel pipe is provided with a fixing groove, and the stay wire is fixed in the fixing groove through welding spot welding.
Preferably, the material of the steel pipe is stainless steel.
Preferably, the material of the outer tube is a polymer to be developed under X-ray.
Preferably, the material of the pull wire is a steel wire.
The invention also provides a transjugular intrahepatic puncture system which comprises the adjustable bent sheath tube.
Compared with the prior art, the adjustable bending sheath pipe provided by the invention comprises a pipe body and a joint, wherein the pipe body and the joint are mutually connected and communicated, the pipe body comprises three layers from inside to outside along the diameter direction, the three layers are an inner pipe, a steel pipe and an outer pipe in sequence, the steel pipe is provided with a plurality of cutting gaps along the axial direction, intervals are reserved among the cutting gaps, a wire pulling cavity and a conveying cavity are arranged inside the inner pipe, a wire pulling is arranged in the wire pulling cavity, the head end of the wire pulling is fixedly connected with the head end of the steel pipe, when the tail end of the wire pulling is tensioned, the head end of the wire pulling is stressed and drives the steel pipe to bend, a plurality of gaps with similar shapes are regularly cut in the length direction through the cutting gaps arranged on the steel pipe, so that the steel pipe is convenient to bend, the head end of the wire pulling is stressed by arranging the wire pulling in the wire pulling, thereby the head end of pulling the steel pipe of acting as go-between drives adjustable curved sheath pipe crooked, or through relaxing the tail end of acting as go-between, makes the head end of acting as go-between relax, adjustable curved sheath pipe relaxs and straightens, and the sheath pipe after the accent is bent matches with patient's blood vessel distribution actual conditions, reaches the purpose of more accurate puncture and conveying apparatus, improves the security and the validity of operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an adjustable bending sheath according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a steel pipe according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a steel pipe according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of an adjustable bending sheath according to an embodiment of the present invention.
Wherein:
1-pipe body, 11-fixed groove, 12-inner pipe, 121-stay wire cavity, 122-conveying cavity, 13-steel pipe, 14-outer pipe, 141-cutting gap, 2-control handle, 3-joint, 4-stay wire and 41-welding point.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an adjustable bending sheath according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a steel pipe according to an embodiment of the present invention, fig. 3 is a schematic structural diagram of a steel pipe according to an embodiment of the present invention, and fig. 4 is a schematic cross-sectional diagram of an adjustable bending sheath according to an embodiment of the present invention.
In a first specific embodiment, the adjustable bending sheath tube provided by the invention comprises a tube body 1 and a joint 3, a passage is arranged inside the tube body 1 and the joint 3, the tube body 1 and the joint 3 are connected and communicated with each other, the tube body 1 is divided into three layers, the inner tube 12, the steel tube 13 and the outer tube 14 are sequentially arranged along the diameter direction of the tube body 1 from inside to outside, the inner tube 12 is of a double-hole structure, a pull wire cavity 121 and a conveying cavity 122 which are in the same direction are arranged along the axial length direction of the inner tube 12, a pull wire 4 is arranged in the pull wire cavity 121, the head end of the pull wire 4 is fixedly connected with the head end of the steel tube 13, a plurality of cutting gaps 141 are arranged along the axial length direction of the steel tube 13, and intervals are reserved among the cutting.
In this embodiment, the steel pipe 13 is formed by regularly cutting a plurality of slits with similar shapes in the length direction, so that the steel pipe 13 is convenient to bend, the side surface of the steel pipe 13 with the cut gap 141 is the inner side surface of the steel pipe 13 when bending, and the side surface of the steel pipe 13 without the cut gap 141 is the outer side surface of the steel pipe 13 when bending. In the actual operation process, the stay wire 4 with the head end fixedly connected with the steel pipe 13 extends out of the stay wire cavity 121 with a margin, and the stay wire 4 is manually or mechanically controlled to be tensioned or loosened, wherein the specific expression is the pulling effect on the stay wire 4; when the stay wire 4 is tensioned, the stay wire 4 transmits force to the head end of the steel pipe 13, the steel pipe 13 is bent by taking one side of the cutting gap 141 as an inner side surface under the pulling action of the stay wire 4, the sheath pipe formed by combining the inner pipe 12, the steel pipe 13 and the outer pipe 14 is bent under the action of the stay wire 4, the adjustable bent sheath pipe is bent as a whole, and the adjustable bent sheath pipe has an adjustable bent effect. Wherein, the inner tube 12 and the outer tube 14 are flexible elastic structures, the outer tube 14 and the steel tube 13 are fixedly connected in a heat-shrinkable manner, and the inner tube 12 and the outer tube 14 are heat-shrinkable at the head end of the steel tube 13.
On the basis, when the bending of the sheath tube is finished, namely the adjustable bending sheath tube is bent to a proper angle according to the distribution condition of blood vessels of different patients, the guide wire, the catheter, the puncture needle, the stent and other interventional devices are conveyed through the joint 3 and conveyed to a target position through the conveying cavity 122 of the inner tube 12 of the tube body 1, so that the effects of more accurate and effective puncture and conveying are achieved, and the success rate of the operation is ensured.
Exemplarily, the adjustable bending sheath tube can be manually bent by manually loosening the pull wire 4, and can also be accurately controlled by the pull wire 4 through the control handle 2, so that the bending type can be accurately controlled.
Specifically, an operating handle 2 is arranged between the tube body 1 and the joint 3, a rotating disc is arranged on the operating handle 2, a pushing plate is arranged below a rotating shaft connected with the rotating disc, and the tail end of the pull wire 4 is fixed on the pushing plate; when the rotating disc is rotated, the rotating shaft can drive the pushing plate to move back and forth, so that the pull wire 4 is tensioned or loosened, and bending adjustment is realized.
In the present embodiment, by rotating the control handle 2, the pulling wire 4 in the pulling wire cavity 121 is tightened or loosened, and the pulling wire 4 has a starting length when the steel pipe 13 is straightened. When the pull wire 4 is tensioned, the length of the pull wire 4 in the pull wire cavity 121 is shortened from the initial length, and the pull wire 4 drives the steel pipe 13 to bend around the inner side surface; when the wire 4 is loosened, the length of the wire 4 in the wire lumen 121 becomes longer and finally returns to the original length, and the steel pipe 13 finally returns to straight. Wherein, the different control position of control handle 2 corresponds to the different curved types of adjustable curved sheath pipe, realizes the different curved types of adjustable curved sheath pipe through the rotary disk of adjusting control handle 2.
In addition, the head end of the stay wire 4 is fixed inside the head end of the steel pipe 13, more specifically, the head end of the steel pipe 13 is provided with a fixing groove 11, the fixing groove 11 is in a hole-shaped strip line shape matching with the stay wire 4, and the stay wire 4 is welded and fixed in the fixing groove 11 by a welding point 41.
Illustratively, the material of the steel pipe 13 is stainless steel; the material of the outer tube 14 is a polymer developable under X-rays; the pull wire 4 is made of steel wire.
Specifically, the steel pipe 13 is a stainless steel pipe with an inner diameter of 2.8mm and an outer diameter of 3.3mm, the stainless steel pipe has an adjustable bending section with a cutting gap 141 and an unadjustable bending section without the cutting gap 141, and the cutting gap 141 is a plurality of gaps with similar shapes and are regularly cut.
In order to facilitate the steel pipe 13 to be bent, the width of the cutting gap 141 is increased from the head end of the steel pipe 13 to the tail end of the steel pipe 13 and then decreased, that is, the cutting gap is gradually increased and then gradually decreased; in order to provide sufficient structural strength to the bent steel pipe 13, the width of the ridge of the steel pipe 13 is gradually increased from the head end of the steel pipe 13 to the tail end of the steel pipe 13 to maintain a certain supporting force.
In the embodiment, the bending-adjustable section of the steel pipe 13 can be repeatedly adjusted to be bent, the smooth bending surface is kept, and no wrinkle or fracture occurs; the pull wire cavity 121 and the delivery cavity 122 of the inner tube 12 are respectively prevented from being contacted with each other by the pull wire 4 and the instrument.
In a specific embodiment, the delivery lumen 122 is located in the lumen of the inner tube 12 and the pull wire lumen 121 is located in the wall of the inner tube 12, wherein the pull wire lumen 121 is located at the periphery of the delivery lumen 122.
In the practical application process, firstly, the adjustable bent sheath tube is placed into the hepatic vein along the catheter sheath through the jugular vein; secondly, placing a guide wire and a catheter through the adjustable bent sheath tube, injecting a contrast agent for angiography, and confirming the distribution of hepatic veins; then, the bending shape of the steel tube 13 is changed by controlling the control handle 2 according to the blood vessel distribution condition so as to determine the puncture direction; finally, the puncture needle, the balloon catheter, the stent and other interventional devices are conveyed, and the purposes of puncture and conveyance of the devices are achieved.
The invention also provides a transjugular intrahepatic puncture system, which comprises the adjustable bent sheath tube and has all the beneficial effects of the adjustable bent sheath tube, and the details are not repeated.
The transjugular intrahepatic puncture system and the adjustable bent sheath provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. The adjustable bending sheath pipe is characterized by comprising a pipe body (1) and a connector (3) which are connected, wherein the pipe body (1) sequentially comprises an inner pipe (12), a steel pipe (13) and an outer pipe (14) from inside to outside along the radial direction, the steel pipe (13) is provided with a plurality of cutting gaps (141) at intervals along the axial direction, the inner pipe (12) is provided with a stay wire cavity (121) and a conveying cavity (122), a stay wire (4) is arranged in the stay wire cavity (121), and the head end of the stay wire (4) is fixedly connected with the head end of the steel pipe (13);
when the pull wire (4) is tensioned, the pull wire (4) drives the steel pipe (13) to bend.
2. The sheath tube with adjustable bending according to claim 1, further comprising a control handle (2) arranged at the tail end of the tube body (1), wherein the tail end of the pull wire (4) is fixed on the control handle (2).
3. The bending-adjustable sheath according to claim 1, wherein the width of the cutting gap (141) increases from the head end of the steel pipe (13) to the tail end of the steel pipe (13) and then decreases.
4. The bending-adjustable sheath according to claim 1, wherein the width of the ridge of the steel pipe (13) increases from the head end of the steel pipe (13) to the tail end of the steel pipe (13).
5. The adjustable bend sheath of claim 1, wherein the delivery lumen (122) is located in a lumen of the inner tube (12) and the pull wire lumen (121) is located in a wall of the inner tube (12).
6. The adjustable-bending sheath pipe according to claim 1, wherein the head end of the steel pipe (13) is provided with a fixing groove (11), and the pull wire (4) is fixed in the fixing groove (11) by welding through a welding point (41).
7. The bending adjustable sheath according to claim 1, wherein the steel tube (13) is made of stainless steel.
8. The tunable bending sheath according to claim 1, wherein the material of the outer tube (14) is a polymer to be developed under X-ray.
9. The adjustable bending sheath according to claim 1, wherein the material of the pulling wire (4) is a steel wire.
10. A transjugular intrahepatic puncture system comprising an adjustable curved sheath according to any one of claims 1 to 9.
CN201911157880.2A 2019-11-22 2019-11-22 Adjustable bent sheath tube and transjugular intrahepatic puncture system Pending CN110840531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911157880.2A CN110840531A (en) 2019-11-22 2019-11-22 Adjustable bent sheath tube and transjugular intrahepatic puncture system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911157880.2A CN110840531A (en) 2019-11-22 2019-11-22 Adjustable bent sheath tube and transjugular intrahepatic puncture system

Publications (1)

Publication Number Publication Date
CN110840531A true CN110840531A (en) 2020-02-28

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Family Applications (1)

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CN201911157880.2A Pending CN110840531A (en) 2019-11-22 2019-11-22 Adjustable bent sheath tube and transjugular intrahepatic puncture system

Country Status (1)

Country Link
CN (1) CN110840531A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104027880A (en) * 2014-06-30 2014-09-10 上海凯利泰医疗科技股份有限公司 Curvature controllable catheter sheath device
JP6482079B2 (en) * 2014-11-07 2019-03-13 国立大学法人金沢大学 Articulated manipulator
EP3415102A3 (en) * 2017-06-12 2019-03-27 Covidien LP Flexible surgical stapler
CN109700508A (en) * 2018-12-29 2019-05-03 先健科技(深圳)有限公司 Piercing assembly and lancing system with it
CN208851537U (en) * 2018-03-16 2019-05-14 上海形状记忆合金材料有限公司 A kind of adjustable bending delivery sheath that can show bending angle
CN109771014A (en) * 2019-03-15 2019-05-21 武汉唯柯医疗科技有限公司 Adjustable bending atrial septal puncture system
CN109965946A (en) * 2017-12-28 2019-07-05 先健科技(深圳)有限公司 Dilated penetration device, component and medical instrument

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104027880A (en) * 2014-06-30 2014-09-10 上海凯利泰医疗科技股份有限公司 Curvature controllable catheter sheath device
JP6482079B2 (en) * 2014-11-07 2019-03-13 国立大学法人金沢大学 Articulated manipulator
EP3415102A3 (en) * 2017-06-12 2019-03-27 Covidien LP Flexible surgical stapler
CN109965946A (en) * 2017-12-28 2019-07-05 先健科技(深圳)有限公司 Dilated penetration device, component and medical instrument
CN208851537U (en) * 2018-03-16 2019-05-14 上海形状记忆合金材料有限公司 A kind of adjustable bending delivery sheath that can show bending angle
CN109700508A (en) * 2018-12-29 2019-05-03 先健科技(深圳)有限公司 Piercing assembly and lancing system with it
CN109771014A (en) * 2019-03-15 2019-05-21 武汉唯柯医疗科技有限公司 Adjustable bending atrial septal puncture system

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