WO2020093698A1 - 输尿管导管结构 - Google Patents

输尿管导管结构 Download PDF

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Publication number
WO2020093698A1
WO2020093698A1 PCT/CN2019/091126 CN2019091126W WO2020093698A1 WO 2020093698 A1 WO2020093698 A1 WO 2020093698A1 CN 2019091126 W CN2019091126 W CN 2019091126W WO 2020093698 A1 WO2020093698 A1 WO 2020093698A1
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WO
WIPO (PCT)
Prior art keywords
tube
stainless steel
steel outer
curved
outer tube
Prior art date
Application number
PCT/CN2019/091126
Other languages
English (en)
French (fr)
Inventor
陈东
张一�
Original Assignee
苏州新光维医疗科技有限公司
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Application filed by 苏州新光维医疗科技有限公司 filed Critical 苏州新光维医疗科技有限公司
Priority to US17/291,771 priority Critical patent/US20210386967A1/en
Publication of WO2020093698A1 publication Critical patent/WO2020093698A1/zh

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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
    • A61M25/0053—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/08—Materials for coatings
    • A61L29/10—Inorganic materials
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/02—Inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/04—Macromolecular materials
    • A61L29/041—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/08—Materials for coatings
    • A61L29/085—Macromolecular materials
    • 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
    • A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/307—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the urinary organs, e.g. urethroscopes, cystoscopes
    • 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
    • A61M2025/0059—Catheters; Hollow probes characterised by structural features having means for preventing the catheter, sheath or lumens from collapsing due to outer forces, e.g. compressing forces, or caused by twisting or kinking
    • 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/10—Trunk
    • A61M2210/1078—Urinary tract

Definitions

  • the invention relates to the technical field of inner tube structures in medical appliances, in particular to a ureteral catheter structure.
  • ureteroscope is a kind of endoscope with special equipment for diagnosis and disease treatment in the upper urinary tract of the urinary system. It does not need to make a large incision in the human body, which significantly reduces the damage to the tissue, thereby speeding up the recovery of the body and shortening the treatment course Improving efficacy is an important development of endoscopic technology. Its clinical application has changed the traditional concept that the ureter and pelvis and renal calyces are difficult to visually inspect and upper urinary tract diseases must be treated with open surgery.
  • rigid ureteroscope and soft ureteroscope.
  • Rigid ureteroscope has good direction and the advantages of easy operation and insertion.
  • visual fields and operation blind areas are visual fields and operation blind areas. Although flexible ureteroscope can eliminate the visual field and The operation is blind, but the lens body is soft, the controllability is poor, the operation is difficult, the learning period is long, and it is expensive and easy to damage.
  • the existing Chinese patent with publication number CN1543907A discloses a minimally invasive endoscope for diagnosis and treatment of upper urinary tract diseases, which is controlled by a flexible lens end and a rigid lens body and its rear operating handle.
  • a new type of ureteroscope composed of operation keys at the end of the body bending movement.
  • the end of the scope in the rigid ureteroscope, can be bent at 0-180 degrees in two opposite directions, which is convenient for entering the kidney calyces.
  • the material of the entire rigid ureter is basically the same, so the hardness is relatively consistent. The amount of movement affects the use and detection effect.
  • the purpose of the present invention is to provide a ureteral catheter structure, which has the advantage of adopting a multi-segment structure, so that the end of the ureter can be independently bent in multiple segments, and a better detection effect is achieved.
  • a ureteral catheter structure including a catheter body, the catheter body includes a step braided tube, a curved tube and a plastic catheter head spliced together, a step braided tube and a curved tube
  • the splicing place is connected with the first stainless steel outer tube, which is covered with the first PET heat shrinkable film;
  • a second stainless steel outer tube is received between the curved tube and the plastic catheter head, the second stainless steel outer tube is covered with a second PET heat shrinkable film, and the catheter body is provided with a pulling wire, the pulling wire One end of the tube is fixed on the curved tube, and the other end passes through the step braided tube; a heat shrinkable sleeve is provided outside the curved tube.
  • the ureteral catheter structure integrates a multi-segment structure, including a step braided tube, a curved tube, and a plastic catheter head; there are multiple splices, and the splice is connected by the first stainless steel outer tube, and then the first PET heat shrink
  • the film and the second PET heat-shrinkable film are wrapped on the first stainless steel outer tube and the second stainless steel outer tube, respectively, to achieve the sealing and fixing effect; specifically, the hardness of the step braided tube is relatively high, while the bending tube has a better Bending ability, so the bending tube is easier to bend than the step braided tube, so it has a relatively independent bending action.
  • the side of the bending tube near the plastic catheter head is first bent, and then the farther away from the plastic catheter head, the less the bend; In this process, the overall structure forms a good bending gradient, that is, the direction of the plastic catheter head can be changed steadily with the pulling of the pulling wire, and the plastic catheter head can achieve a better detection angle.
  • the curved tube is provided with a plurality of inner fasteners along its length, and the traction wire passes through the plurality of inner fasteners and is fixed in the inner fastener on the side close to the plastic catheter head.
  • the inner fastener relatively fixes the pulling wire, reducing the amount of swing of the pulling wire, making the pulling wire more stable in the curved tube, the pulling wire is less likely to damage the inner wire, and the pulling wire moves steadily through the inner fastener.
  • the curved tube is provided with a plurality of arc-shaped shrinkage grooves and installation grooves along its length direction
  • the inner fastener is a buckle
  • both sides of the buckle extend with finite wing plates
  • the installation groove The buckle is embedded, and the limiting wing plate of the buckle is pressed on the outside of the installation groove.
  • the arc-shaped shrinkage groove can be used for bending the bending tube, and the shrinkage groove provides a sufficient amount of bending deformation space, so that the bending tube can be bent better;
  • the inner fastener is actually a buckle, and the shape of the buckle is similar to Umbrella-shaped structure, the limit wings are extended on both sides of the buckle, and the limit wings are pressed on the outer wall of the curved tube.
  • the heat shrink tube can be covered to fix the buckle.
  • the buckle is used for pulling the wire through.
  • the swing range of the traction wire is reduced; because the bending tube itself has a lower hardness than the step braided tube, and the bending tube also achieves a more flexible bending force through the shrinking groove, the bending tube is easier to bend.
  • the shrinkage grooves are evenly distributed along the circumferential surface of the side wall of the curved tube, and the adjacent shrinkage grooves are staggered along the length of the curved tube.
  • a plurality of shrinkage grooves are staggered, on the one hand, the curved tube can retain better bending performance, on the other hand, the staggered shrinkage grooves make the curved tube have better structural strength, and the bending tube is uniformly stressed at all positions .
  • the contraction groove of the curved tube away from the head of the plastic catheter has a zigzag structure.
  • the shrinkage groove away from the plastic catheter head is in a zigzag shape. Therefore, on the one hand, the protruding zigzag structure can resist the heat shrinkable sleeve.
  • the elastic shrinkage of the heat shrinkable sleeve It can make the bending tube far away from the plastic catheter head have a strong elastic restoring force, so that the bending tube here quickly returns to the straight state, and the operability is high.
  • the step braided tube is provided with an inner liner body for fitting the first stainless steel outer tube.
  • the inner lining tube body and the first stainless steel outer tube cooperate with each other, thereby making it easier to align the first stainless steel outer tube, so that the first stainless steel outer tube can better cover the splicing of the step braided tube and the curved tube gap.
  • the curved tube is divided into several snake bone segments along its length direction
  • the inner fastener is an inner convex ring
  • the inner convex ring is stamped inwardly on the snake bone segment
  • the inner convex ring is provided for traction
  • the wire passes through, one end of the pulling wire is snapped on the inner convex ring, and the other end passes out from the step braided tube.
  • the curved tube adopts several snake bone joints.
  • the structure of the snake bone joint has high rotational flexibility and can be adapted to the overall rotation of the curved tube.
  • the inner convex ring is formed by stamping, so no additional installation is required and the assembly is simplified. step.
  • the snake bone joint is provided with a guide convex circle and a guide groove adapted to the shape of the guide convex circle, and the guide convex circle and the guide groove adjacent to the snake bone joint cooperate with each other.
  • the guiding convex circle on the snake bone joint can make the rotation of the adjacent snake bone joint more flexible, reducing the relative rotational resistance of the adjacent snake bone joint; at the same time, the cooperation of the guiding convex circle and the guide groove also makes the adjacent snake bone joint It is not easy to separate, which improves the splicing stability of the snake joint.
  • the step braided tube is provided with an inner embedded groove, and the inner embedded groove is embedded with a stainless steel inner tube, the stainless steel inner tube is spliced with one end of the snake bone joint, and the snake bone joint is passed between the stainless steel inner tube
  • the first stainless steel outer tube is sleeved; the snake bone joint, the first stainless steel outer tube and the step braided tube are bonded by a PTFE heat shrinkable tube.
  • the inner groove can be inserted into the stainless steel inner tube. After embedding, it is equivalent to receiving the end of the snake joint and the step braided tube, so that the gap between the step braided tube and the snake joint is sealed; in addition, further The first stainless steel outer tube is then sheathed on the snake bone joint and the stainless steel inner tube, and the relevant parts are bonded through the PTFE heat shrinkable tube, thereby improving the structural stability and waterproofness of the connection.
  • the invention is further configured such that: between the first stainless steel outer tube and the first PET heat shrinkable film, between the second stainless steel outer tube and the second PET heat shrinkable film, and between the curved tube and the heat shrinkable sleeve Glue fixed connection.
  • the multi-segment structure is adopted to form a multi-segment bending gradient, the bending performance of the bending tube is better, and it can be bent earlier than the step braided tube, thereby making the front bending effect better and the detection more stable;
  • the inner fastener makes the pulling wire difficult to swing, and the hierarchical arrangement of the structure increases the sealing performance and achieves a good waterproof effect.
  • FIG. 1 is a schematic diagram of the overall structure of Embodiment 1;
  • FIG. 2 is a schematic diagram of the internal structure of the first embodiment
  • FIG. 3 is an enlarged view at A of FIG. 2;
  • FIG. 4 is an enlarged view at B of FIG. 2;
  • FIG. 5 is an enlarged view at C of FIG. 2;
  • Example 6 is a schematic diagram of the internal structure of Example 2.
  • FIG. 8 is an enlarged view of E in FIG. 6;
  • Example 9 is a schematic diagram of disassembly of Example 2.
  • FIG. 10 is a bending state diagram of Example 2.
  • Embodiment 1 Referring to FIG. 1, it is a ureteral catheter structure disclosed in the present invention, which includes a catheter body 1.
  • the catheter body 1 includes a step braided tube 2, a curved tube 3 and a plastic catheter head 14.
  • the step braided tube 2 may be made of nickel-titanium alloy, the step braided tube 2 and the curved tube 3 are spliced, and the joint of the step braided tube 2 and the curved tube 3 is covered with a first stainless steel outer tube 4, The outside of the first stainless steel outer tube 4 is covered with a first PET heat-shrinkable film 5, and the first PET heat-shrinkable film 5 can receive various components after being heat-shrinked.
  • the step braided tube 2 is provided with an inner liner tube body 21, which makes the outer wall of the step braided tube 2 form a stepped shoulder, and the inner liner tube body 21 can be used for the sliding fit of the first stainless steel outer tube 4, thereby Improve the butt tightness of the first stainless steel outer tube 4.
  • the bending tube 3 is arranged with a plurality of contraction grooves 31 and mounting grooves 32 along its length direction, and the mounting grooves 32 have an arc structure.
  • the mounting groove 32 is fitted with a buckle 10, and a limit wing plate (not shown) is extended on both sides of the buckle 10, the limiting wing plate is pressed against the outer wall of the mounting groove 32, and the outer wall of the bending tube 3 is covered with heat
  • the shrink sleeve 9 presses the buckle 10 through the heat-shrinkable sleeve 9 so that the buckle 10 is locked with the mounting groove 32.
  • the buckle 10 is used for passing the traction wire 8.
  • the two traction wires 8 are located at opposite positions of the inner wall of the curved tube 3. One end of the traction wire 8 is fixed at the end of the curved tube 3 near the plastic catheter head 14, and the other end of the traction wire 8 Step through the braided tube 2. By pulling the two pulling wires 8, the bending tube 3 is driven to bend.
  • the shrink grooves 31 are evenly distributed along the circumferential surface of the side wall of the curved tube 3, that is, in the perspective shown in FIG. 3, the shrink grooves 31 may be disposed on the upper and lower side walls (the corresponding center angle is less than 180 degrees ), And the adjacent shrink grooves 31 are disposed on the left and right side walls, and are staggered with each other.
  • the shrink groove 31 near the plastic catheter head 14 is arc-shaped, and the shrink groove 31 away from the plastic catheter head 14 has a zigzag structure (see FIG. 4).
  • the protruding zigzag structure can resist the heat shrinkable tube 9, and the elastic shrinkage of the heat shrinkable tube 9 can make the bending tube 3 far away from the plastic catheter head 14 strong Elastic resilience.
  • Embodiment 2 The difference from the embodiment is that, as shown in FIGS. 7 and 8, the curved tube 3 is divided into several snake joints 33 along its length, and each adjacent snake joint 33 is spliced and not connected to each other.
  • the snake bone joint 33 is provided with a guide convex circle 332 and a guide groove 333.
  • the guide convex circle 332 and the guide groove 333 cooperate with each other to form a restriction on relative rotation.
  • the sliding resistance between the snake bone joints 33 is small when bending, which can be passed
  • the heat shrinkable sleeve 9 is quickly deformed and restored.
  • the snake joint 33 is formed with an inner convex ring 331 by punching.
  • the inner convex ring 331 can pass through the pulling wire 8 and serves as a guide structure to make the pulling wire 8 pass through the step braided tube 2 at the other end.
  • the inner side of the step braided tube 2 is provided with an inlaid groove 22, and the stainless steel inner tube 12 is embedded in the inner groove 22.
  • the first stainless steel outer tube 4 sleeve, after splicing and then bonded by PTFE heat shrinkable tube 13, after fixing to form a multi-layer sealing structure.
  • FIG. 9 is a disassembled structural diagram of Example 2
  • FIG. 10 is a simulation diagram of a bending state of Embodiment 2, a diagram simulating two limit bending angles of the bending tube 3.

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Abstract

一种输尿管导管结构，包括导管本体（1），导管本体（1）包括相互拼接的台阶编织管（2）、弯曲管（3）和塑料导管头（14），台阶编织管（2）和弯曲管（3）的拼接处承接有第一不锈钢外管（4），第一不锈钢外管（4）上覆设有第一PET热缩薄膜（5）；弯曲管（3）与塑料导管头（14）之间承接有第二不锈钢外管（6），第二不锈钢外管（6）上覆设有第二PET热缩薄膜（7），导管本体（1）内设有牵引丝（8），牵引丝（8）的一端固定于弯曲管（3）上，另一端从台阶编织管（2）中穿出；弯曲管（3）外设有热缩套管（9）。输尿管导管的末端能够多段独立弯曲，实现较好的检测效果，解决了输尿管导管的末端偏转不稳定的技术问题。

Description

输尿管导管结构 技术领域
本发明涉及医疗用具中的内管结构技术领域，尤其是涉及一种输尿管导管结构。
背景技术
目前输尿管镜是一种借助特殊器械在泌尿***上尿路内进行诊断和疾病治疗的内腔镜，它不需再在人体作大切口，明显减少对组织的损伤，从而加快机体恢复，缩短疗程，提高疗效，是内腔镜技术上的重要发展，它在临床上的应用，改变了长期以来输尿管、肾盂肾盏部位难于进行直观检查及上尿路疾患必须行开放手术治疗的传统概念。目前应用的输尿管镜有硬性输尿管镜和软性输尿管镜两类，硬性输尿管镜有良好的方向性和便于操作、插放的优点，但是存在视野和操作盲区，软性输尿管镜虽然可以消除视野和操作盲区，但是镜体柔软，可控性差，操作困难，学习周期长，且价格昂贵，容易损坏。
现有的公开号为CN1543907A的中国专利公开了一种用于上尿路疾病诊断和治疗的微创内镜，是由可弯曲的镜体末端与硬性的镜体及其后方操作手柄上控制镜体末端弯曲运动的操作键共同构成的新型输尿管镜。
上述方案中，硬性输尿管镜中，镜体末端可向两个相对方向各折曲0-180度，方便进入各肾盏。但由于实际生产加工时，整个硬性输尿管的材质基本一致，因此硬度也较为一致，末端的输尿管弯曲时，前端的输尿管也容易发生弯曲或是收卷，因此输尿管的末端检测位置将产生较多的移动量，影响了使用和检测效果。
发明内容
本发明的目的是提供一种输尿管导管结构，其优点是采用多段结构，使得输尿管末端能够多段独立弯曲，实现较好的检测效果。
本发明的上述技术目的是通过以下技术方案得以实现的：一种输尿管导 管结构，包括导管本体，所述导管本体包括相互拼接的台阶编织管、弯曲管和塑料导管头，台阶编织管和弯曲管的拼接处承接有第一不锈钢外管，第一不锈钢外管上覆设有第一PET热缩薄膜；
所述弯曲管与塑料导管头之间承接有第二不锈钢外管，所述第二不锈钢外管上覆设有第二PET热缩薄膜，所述导管本体内设有牵引丝，所述牵引丝的一端固定于弯曲管上，另一端从台阶编织管中穿出；所述弯曲管外设有热缩套管。
通过上述技术方案，该输尿管导管结构整合了多段结构，包括台阶编织管、弯曲管和塑料导管头；其中存在多处拼接，拼接处采用第一不锈钢外管实现连接，再用第一PET热缩薄膜和第二PET热缩薄膜分别包裹在第一不锈钢外管和第二不锈钢外管上，达到了密封和固定效果；具体的，台阶编织管的硬度相对较高，而弯曲管具有较好的弯曲能力，因此弯曲管相对于台阶编织管更容易弯曲，因此也就具有相对独立的弯曲动作，弯曲管靠近塑料导管头的一侧最先形成弯曲，随后越远离塑料导管头的弯度越少；该过程中，整体结构形成了良好的弯曲梯度，即塑料导管头的指向随着牵引丝的抽动能够稳定转变，塑料导管头可实现较好的检测视角。
本发明进一步设置为：所述弯曲管沿其长度方向设有若干内扣件，所述牵引丝从若干内扣件中穿过并固定于靠近塑料导管头一侧的内扣件中。
通过上述技术方案，内扣件将牵引丝相对固定，减少了牵引丝的摆动量，使得牵引丝在弯曲管内更为稳定，牵引丝不易损伤内侧的导线，并且牵引丝通过内扣件稳定移动。
本发明进一步设置为：所述弯曲管沿其长度方向设有若干弧形的收缩槽和安装槽，所述内扣件为卡扣，卡扣的两侧延伸有限位翼板，所述安装槽供卡扣嵌入，所述卡扣的限位翼板压合于安装槽外侧。
通过上述技术方案，弧形的收缩槽可供弯曲管弯曲，收缩槽提供了足量的弯曲形变空间，使得弯曲管能够较好的弯曲；内扣件实际为卡扣，卡扣的 形状类似于伞形结构，卡扣的两侧延伸出限位翼板，限位翼板压在弯曲管外壁上，此时再覆上热缩套管即可固定卡扣，卡扣供牵引丝穿过，减少了牵引丝的摆动范围；由于弯曲管本身相对于台阶编织管的硬度较低，同时弯曲管还通过收缩槽实现了更灵活的弯曲力，因此弯曲管更易弯曲。
本发明进一步设置为：所述收缩槽沿弯曲管的侧壁周面均匀分布，沿弯曲管长度方向相邻的收缩槽错开设置。
通过上述技术方案，采用多个收缩槽交错设置，一方面弯曲管能够保留较好的弯曲性能，另一方面，错开的收缩槽使得弯曲管具有较好的结构强度，弯曲管各位置受力均匀。
本发明进一步设置为：所述弯曲管远离塑料导管头处的收缩槽呈几字型结构。
通过上述技术方案，远离塑料导管头的收缩槽呈几字型，因此，一方面凸出的几字形结构能够抵触于热缩套管上，当弯曲管弯曲时，通过热缩套管的弹性收缩，能够使得远离塑料导管头处的弯曲管具有很强的弹性回复力，使得此处的弯曲管快速恢复伸直的状态，可操作性较高。
本发明进一步设置为：所述台阶编织管上设有供第一不锈钢外管嵌合的内衬管体。
通过上述技术方案，内衬管体与第一不锈钢外管相互配合，由此使得第一不锈钢外管更加方便对位，使得第一不锈钢外管能够较好得覆盖台阶编织管和弯曲管的拼接间隙。
本发明进一步设置为：所述弯曲管沿其长度方向分隔为若干蛇骨节，所述内扣件为内凸环，所述蛇骨节上向内冲压成型内凸环，所述内凸环供牵引丝穿过，牵引丝的一端卡接于内凸环上，另一端从台阶编织管中穿出。
通过上述技术方案，弯曲管采用若干蛇骨节，蛇骨节的结构具有较高的转动灵活性，能够适应于弯曲管整体的转动，另外内凸环通过冲压成型，因此无需额外的安装，简化了组装步骤。
本发明进一步设置为：所述蛇骨节上设有导向凸圆、与导向凸圆形状适配的导向槽，相邻所述蛇骨节的导向凸圆和导向槽相互配合。
通过上述技术方案，蛇骨节上的导向凸圆可使得相邻蛇骨节的转动更加灵活，减少了相邻蛇骨节的相对转动阻力；同时，导向凸圆和导向槽配合也使得相邻蛇骨节之间不易脱离，提高了蛇骨节的拼接稳定性。
本发明进一步设置为：所述台阶编织管内侧设有内嵌槽，所述内嵌槽内嵌设有不锈钢内管，不锈钢内管与蛇骨节的一端拼接，蛇骨节与不锈钢内管之间通过第一不锈钢外管套接；蛇骨节、第一不锈钢外管和台阶编织管之间通过PTFE热缩管粘结。
通过上述技术方案，内嵌槽可供不锈钢内管嵌入，嵌入后相当于承接了末端的蛇骨节和台阶编织管，由此台阶编织管和蛇骨节之间的缝隙得到密封；另外，进一步的，第一不锈钢外管再套在蛇骨节和不锈钢内管上，同时通过PTFE热缩管粘结相关零部件，由此提高了连接处的结构稳定性和防水性。
本发明进一步设置为：所述第一不锈钢外管和第一PET热缩薄膜之间、第二不锈钢外管与第二PET热缩薄膜之间、弯曲管与热缩套管之间均通过UV胶固定连接。
通过上述技术方案，多处拼接结构均采用UV胶固定，提高了第一PET热缩薄膜、第二PET热缩薄膜的连接稳定性，整体防水效果较好。
综上所述，本发明的有益技术效果为：
1.采用多段结构，形成了多段弯曲梯度，弯曲管的弯曲性能较好，能够相对于台阶编织管更早弯曲，由此使得前段弯曲效果更好，检测更稳定；
2.多段结构中，内扣件使得牵引丝不易摆动，而结构层次化布置增加了密封性，实现了较好的防水效果。
附图说明
图1是本实施例1的整体结构示意图；
图2是本实施例1的内部结构示意图；
图3是图2的A处放大图；
图4是图2的B处放大图；
图5是图2的C处放大图；
图6是实施例2的内部结构示意图；
图7是图6中D处放大图；
图8是图6中E处放大图；
图9是实施例2的拆解示意图；
图10是实施例2的弯曲状态图。
附图说明，1、导管本体；2、台阶编织管；21、内衬管体；22、内嵌槽；3、弯曲管；31、收缩槽；32、安装槽；33、蛇骨节；331、内凸环；332、导向凸圆；333、导向槽；4、第一不锈钢外管；5、第一PET热缩薄膜；6、第二不锈钢外管；7、第二PET热缩薄膜；8、牵引丝；9、热缩套管；10、卡扣；12、不锈钢内管；13、PTFE热缩管；14、塑料导管头。
具体实施方式
以下结合附图对本发明作进一步详细说明。
实施例1：参照图1，为本发明公开的一种输尿管导管结构，包括导管本体1，导管本体1包括台阶编织管2、弯曲管3和塑料导管头14。
参考图2和图5，其中台阶编织管2可采用镍钛合金材质，台阶编织管2与弯曲管3拼接，台阶编织管2和弯曲管3的拼接处采用第一不锈钢外管4包覆，第一不锈钢外管4的外部通过第一PET热缩薄膜5包覆，第一PET热缩薄膜5通过热缩包覆后即可承接各个部件。
台阶编织管2上设有内衬管体21，该内衬管体21使得台阶编织管2外壁形成阶梯形的轴肩，内衬管体21可供第一不锈钢外管4滑动配合，以此提高第一不锈钢外管4的对接紧密性。
参考图3和图4，弯曲管3沿其长度方向排布有若干收缩槽31和安装 槽32，安装槽32为弧形结构。安装槽32中嵌合有卡扣10，卡扣10的两侧延伸有限位翼板(图中未示出)，限位翼板压在安装槽32的外壁，弯曲管3外壁包覆有热缩套管9，通过热缩套管9压紧卡扣10，使得卡扣10与安装槽32卡紧。卡扣10供牵引丝8穿过，两条牵引丝8分别位于弯曲管3内壁的相对位置，牵引丝8的一端固定在弯曲管3靠近塑料导管头14的末端，牵引丝8的另一端从台阶编织管2中穿出。通过两个牵引丝8的拉扯，带动弯曲管3弯曲。
参考图3和图4，收缩槽31沿弯曲管3的侧壁周面均匀分布，即在图3所示的视角中，收缩槽31可设置于上下侧壁(所对应的圆心角小于180度)，而相邻的收缩槽31设置于左右侧壁，分别相互交错设置。靠近塑料导管头14的收缩槽31为弧形，而远离塑料导管头14的收缩槽31为几字形结构(如图4)。当弯曲管3整体弯曲时，凸出的几字形结构能够抵触于热缩套管9上，通过热缩套管9的弹性收缩，能够使得远离塑料导管头14处的弯曲管3具有很强的弹性回复力。
实施例2：与实施例的不同之处在于，如图7和图8，弯曲管3沿其长度方向分隔为若干蛇骨节33，相邻的每个蛇骨节33之间相互拼接而不连接。蛇骨节33上设置有导向凸圆332、导向槽333，导向凸圆332和导向槽333相互配合，以此形成相对转动的限制，同时弯曲时蛇骨节33之间的滑动阻力较小，可通过热缩套管9快速形变复原。蛇骨节33通过冲压成型有内凸环331，内凸环331可供牵引丝8穿过，并作为导向结构使得牵引丝8从另一端的台阶编织管2中穿出。
如图8，台阶编织管2的内侧设置有内嵌槽22，内嵌槽22的内部嵌设有不锈钢内管12，不锈钢内管12与蛇骨节33的一端拼接，蛇骨节33与不锈钢内管12之间通过第一不锈钢外管4套接，拼接后再通过PTFE热缩管13粘结，固定后形成多层密封结构。
为了提升各个拼接位置处的粘结牢固性和防水性能，第一不锈钢外管4 和第一PET热缩薄膜5之间、第二不锈钢外管6与第二PET热缩薄膜7之间、弯曲管3与热缩套管9之间均通过UV胶固定连接。
图9为实施例2的拆解结构图，图10为实施例2的弯曲状态模拟图，模拟了弯曲管3的两个极限弯曲角度的图。
本具体实施方式的实施例均为本发明的较佳实施例，并非依此限制本发明的保护范围，故：凡依本发明的结构、形状、原理所做的等效变化，均应涵盖于本发明的保护范围之内。

Claims (10)

  1. 一种输尿管导管结构，其特征在于，包括导管本体(1)，所述导管本体(1)包括相互拼接的台阶编织管(2)、弯曲管(3)和塑料导管头(14)，台阶编织管(2)和弯曲管(3)的拼接处承接有第一不锈钢外管(4)，第一不锈钢外管(4)上覆设有第一PET热缩薄膜(5)；
    所述弯曲管(3)与塑料导管头(14)之间承接有第二不锈钢外管(6)，所述第二不锈钢外管(6)上覆设有第二PET热缩薄膜(7)，所述导管本体(1)内设有牵引丝(8)，所述牵引丝(8)的一端固定于弯曲管(3)上，另一端从台阶编织管(2)中穿出；所述弯曲管(3)外设有热缩套管(9)。
  2. 根据权利要求1所述的输尿管导管结构，其特征在于，所述弯曲管(3)沿其长度方向设有若干内扣件，所述牵引丝(8)从若干内扣件中穿过并固定于靠近塑料导管头(14)一侧的内扣件中。
  3. 根据权利要求2所述的输尿管导管结构，其特征在于，所述弯曲管(3)沿其长度方向设有若干弧形的收缩槽(31)和安装槽(32)，所述内扣件为卡扣(10)，卡扣(10)的两侧延伸有限位翼板，所述安装槽(32)供卡扣(10)嵌入，所述卡扣(10)的限位翼板压合于安装槽(32)外侧。
  4. 根据权利要求2所述的输尿管导管结构，其特征在于，所述收缩槽(31)沿弯曲管(3)的侧壁周面均匀分布，沿弯曲管(3)长度方向相邻的收缩槽(31)错开设置。
  5. 根据权利要求3所述的输尿管导管结构，其特征在于，所述弯曲管(3)远离塑料导管头(14)处的收缩槽(31)呈几字型结构。
  6. 根据权利要求2所述的输尿管导管结构，其特征在于，所述台阶编织管(2)上设有供第一不锈钢外管(4)嵌合的内衬管体(41)(21)。
  7. 根据权利要求2所述的输尿管导管结构，其特征在于，所述弯曲管(3)沿其长度方向分隔为若干蛇骨节(33)，所述内扣件为内凸环(331)，所述蛇骨节(33)上向内冲压成型内凸环(331)，所述内凸环(331)供牵引丝(8)穿过，牵引丝(8)的一端卡接于内凸环(331)上，另一端从台阶编织管(2)中穿出。
  8. 根据权利要求7所述的输尿管导管结构，其特征在于，所述蛇骨节(33)上设有导向凸圆(332)、与导向凸圆(332)形状适配的导向槽(333)，相邻所述蛇骨节(33)的导向凸圆(332)和导向槽(333)相互配合。
  9. 根据权利要求8所述的输尿管导管结构，其特征在于，所述台阶编织管(2)内侧设有内嵌槽(22)，所述内嵌槽(22)内嵌设有不锈钢内管(12)，不锈钢内管(12)与蛇骨节(33)的一端拼接，蛇骨节(33)与不锈钢内管(12)之间通过第一不锈钢外管(4)套接；蛇骨节(33)、第一不锈钢外管(4)和台阶编织管(2)之间通过PTFE热缩管(13)粘结。
  10. 根据权利要求1-9任一所述的输尿管导管结构，其特征在于，所述第一不锈钢外管(4)和第一PET热缩薄膜(5)之间、第二不锈钢外管(6)与第二PET热缩薄膜(7)之间、弯曲管(3)与热缩套管(9)之间通过UV胶固定连接。
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