CN111134592A - Spring tube for imaging catheter - Google Patents

Spring tube for imaging catheter Download PDF

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Publication number
CN111134592A
CN111134592A CN201911394990.0A CN201911394990A CN111134592A CN 111134592 A CN111134592 A CN 111134592A CN 201911394990 A CN201911394990 A CN 201911394990A CN 111134592 A CN111134592 A CN 111134592A
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CN
China
Prior art keywords
spring
tube
pipe
imaging catheter
lining
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
CN201911394990.0A
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Chinese (zh)
Inventor
张丹
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Innermedical Co ltd
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Innermedical Co ltd
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Application filed by Innermedical Co ltd filed Critical Innermedical Co ltd
Priority to CN201911394990.0A priority Critical patent/CN111134592A/en
Publication of CN111134592A publication Critical patent/CN111134592A/en
Pending legal-status Critical Current

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    • 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
    • A61B1/00064—Constructional details of the endoscope body
    • 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
    • A61B1/00131—Accessories for endoscopes
    • 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
    • A61B1/00163—Optical arrangements
    • A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
    • 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
    • A61B1/04—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 combined with photographic or television appliances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention provides a spring tube for an imaging catheter, which comprises a spring tube body and an inner lining tube, wherein the front end of the inner lining tube is nested in an inner cavity at the tail end of the spring tube body and is contacted with the inner wall of the inner cavity of the spring tube body, the rear end of the inner lining tube is exposed out of the spring tube body, and plastic coating layers are arranged at the tail end of the spring tube body and the outer side of the inner lining tube; the inner lining pipe is connected between the part close to the tail end of the spring pipe body and the tail end of the spring pipe body through an inner plastic coating, and the inner plastic coating is connected with the plastic coating. By adopting the technical scheme, the plastic-coated structure at the rear end of the spring pipe has the self-lubricating effect while the strength is taken into consideration to protect the spring pipe from being extruded by other sealing parts during movement, so that the spring pipe can still be uniformly driven under the extrusion of the sealing parts, the line contact is changed into the surface contact, and no stress concentration point is generated; and improves the lubricity between the seal structures.

Description

Spring tube for imaging catheter
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a spring tube for an imaging catheter.
Background
In the current imaging catheter, a spring tube is one of the core components of the imaging catheter, and the spring tube plays roles of high-speed pulling back and pushing, rotating and the like in the lumen of the catheter when the imaging catheter works. In order to maintain the transmission performance of the spring tube in the movement process, the rear end of the spring tube and the stainless steel tube are sleeved and fixed through a laser welding process in the prior art. However, this structure and method causes the welding point to be concentrated at the port position of the stainless steel tube, and the stress is also concentrated at the welding point when the spring tube is rotated at high speed and pulled back and pushed, so that the welding point is very easy to break, and the imaging catheter cannot acquire images.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a spring tube for an imaging catheter, which solves the problems that stress concentration at a welding point is easy to break and the like.
In contrast, the technical scheme adopted by the invention is as follows:
the utility model provides a spring pipe for formation of image pipe, its includes spring pipe body and interior bushing pipe, the front end nestification of interior bushing pipe is in the inner chamber of spring pipe body tail end, with the inner wall contact of spring pipe body inner chamber, the spring pipe body is exposed to the rear end of interior bushing pipe, the tail end of spring pipe body and the outside of interior bushing pipe are equipped with the plastic-coated layer.
Furthermore, the spring tube body is a multilayer spring tube body.
By adopting the technical scheme, the lining pipe is nested in the inner cavity of the multilayer spring pipe, the inner part of the lining pipe is hollow, so that optical fibers or cables can pass through the lining pipe, and the lining pipe supports the spring pipe body, so that the spring pipe body can still keep straight when being injected and cannot be deformed due to impact of plastic flow. The plastic coating layer enhances the hardness of the tail end of the spring tube, so that the spring tube does not deform under the extrusion of the sealing element.
As a further improvement of the invention, the lining pipe is connected between the part close to the tail end of the spring pipe body and the tail end of the spring pipe body through an inner plastic coating layer, and the inner plastic coating layer is connected with the plastic coating layer.
By adopting the technical scheme, the plastic-coated layer is coated outside the inner lining pipe and the multilayer spring pipe, the length of the plastic-coated layer is not shorter than that of the inner lining pipe, and the inner plastic-coated layer is positioned between the inner lining pipe and the spring pipe body, so that the tight connection among the spring pipe body, the inner lining pipe and the plastic-coated layer is realized.
As a further improvement of the invention, a gap is arranged between the tail end part of the lining pipe close to the spring pipe body and the inner wall of the inner cavity of the spring pipe body, and the inner plastic-coated layer is formed by heating the material of the plastic-coated layer to flow into the gap between the spring pipe body and the lining pipe and cooling. By adopting the technical scheme, the plastic flow coated with the plastic layer smoothly flows into the space between the spring tube body and the lining tube, and the spring tube body can be tightly fixed in the plastic coating layer after the plastic flow is solidified.
As a further improvement of the invention, the outer diameter of the lining pipe close to the tail end part of the spring pipe body is smaller than that of the head end of the lining pipe.
As a further improvement of the invention, the lining pipe is of a tubular structure with a thick front end and a thin rear end, a tubular structure with a thick rear end and a thin front end, a tubular structure with thick two ends and thin middle, a tubular structure with thin two ends and thick middle, a multi-step tubular structure or a tubular structure with sectional diameter change. Further, the lining pipe can also be in a structure that other similar features are arranged and combined.
As a further improvement of the invention, the part of one side and/or the middle part of the tail end of the lining pipe, which is contacted with the spring pipe body, is provided with a supporting rib which extends outwards and radially. Furthermore, the number of the supporting ribs is four or more, and the supporting ribs are symmetrically arranged.
As a further improvement of the invention, the head of the lining pipe is of a cone structure. The head end has a certain taper, so that the lining pipe can more easily enter the spring pipe, and the processing is convenient.
As a further improvement of the invention, the outer diameter of the part of the lining pipe far away from the tail part of the spring pipe body is consistent with the inner diameter of the spring pipe body. By adopting the technical scheme, the section of the inner lining pipe far away from the tail part of the spring pipe body is thicker than the head part, the outer diameter of the inner lining pipe is basically consistent with the inner diameter of the spring pipe body, and the spring pipe body can be supported during injection molding, so that the spring pipe body can still keep straight after being coated with plastic, and the concentricity of the inner lining pipe and the inner hole of the spring pipe can be ensured. The optical fiber or the cable penetrating into the inner hole can keep certain straightness, and bending or winding is avoided.
As a further improvement of the invention, the lining pipe is made of rigid thermoplastic plastics.
As a further improvement of the invention, the material of the lining pipe and the plastic-coated layer is Polyethylene (PE), polypropylene (PP), Polycarbonate (PC), nylon (PA), acrylonitrile-butadiene-styrene polymer (ABS) or Polyformaldehyde (POM).
As a further improvement of the invention, the plastic-coated layer is made of fluoroplastic with a self-lubricating effect. Furthermore, the plastic-coated layer is made of FEP and PTFE.
Compared with the prior art, the invention has the beneficial effects that:
the technical scheme of the invention provides a spring tube structure with a brand new structure, wherein the plastic-coated structure at the rear end of the spring tube has a self-lubricating effect while the strength is taken into consideration to protect the spring tube from being extruded by other sealing parts during movement, and the stainless steel tube is well replaced. The structure can ensure that the spring tube can still uniformly transmit under the extrusion of the sealing element, changes the line contact into surface contact and does not generate a stress concentration point; and the lubricity between the sealing structures is improved, so that the sealing structure has the smoothness during high-speed rotation motion and the sealing property under high hydraulic pressure.
Drawings
Fig. 1 is a schematic structural view of a spring tube for an imaging catheter according to embodiment 1 of the present invention.
FIG. 2 is a schematic view showing the structure of a lining pipe according to example 2 of the present invention.
FIG. 3 is a schematic view of the structure of a lining pipe according to example 3 of the present invention.
FIG. 4 is a schematic view of the structure of a lining pipe according to example 4 of the present invention.
FIG. 5 is a schematic view showing the structure of a lining pipe according to example 5 of the present invention.
The reference numerals include:
1-spring tube body, 2-lining tube, 3-plastic coating layer, 4-plastic coating layer, and 5-support rib.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
Example 1
As shown in fig. 1, a spring tube for an imaging catheter comprises a spring tube body 1 and an inner lining tube 2, wherein the front end of the inner lining tube 2 is nested in an inner cavity at the tail end of the spring tube body 1 and is in contact with the inner wall of the inner cavity of the spring tube body 1, the rear end of the inner lining tube 2 is exposed out of the spring tube body 1, and a plastic coating layer 3 is arranged at the tail end of the spring tube body 1 and the outer side of the inner lining tube 2. The inner lining pipe 2 is connected between the part close to the tail end of the spring pipe body 1 and the tail end of the spring pipe body 1 through an inner plastic coating layer 4, and the inner plastic coating layer 4 is connected with the plastic coating layer 3. The inner lining pipe 2 is formed by arranging a gap between the tail end part close to the spring pipe body 1 and the inner wall of the inner cavity of the spring pipe body 1, and the inner plastic-coated layer 4 is formed by heating the material of the plastic-coated layer 3 to flow into the gap between the spring pipe body 1 and the inner lining pipe 2 and cooling. The head end of the lining tube 2 is positioned in the spring tube body 1, and the tail end is positioned outside the spring tube body 1 and has a certain distance with the tail end face of the spring tube body 1. Further, the outer diameter of the lining pipe 2 at the part far away from the tail part of the spring pipe body 1 is consistent with the inner diameter of the spring pipe body 1.
Further, the spring tube body 1 is a multilayer spring tube body 1. In this embodiment, the lining tube 2 has a tubular structure with a thick front end and a thin rear end. The outer diameter of the part of the lining pipe 2 far away from the tail part of the spring pipe body 1 is consistent with the inner diameter of the spring pipe body 1.
Further, the lining pipe 2 is made of Polyethylene (PE), polypropylene (PP), Polycarbonate (PC), nylon (PA), Acrylonitrile Butadiene Styrene (ABS), or Polyoxymethylene (POM). The plastic-coated layer 3 is made of FEP and PTFE.
Example 2
Based on the embodiment 1, as shown in fig. 2, the lining pipe 2 is a tubular structure with a thick rear end and a thin front end, and the front end of the lining pipe 2 further includes a conical structure, that is, the front end of the lining pipe 2 is provided with a taper. The tail end of the lining pipe 2 is provided with a radially extending reinforcing rib, a gap is reserved between the adjacent reinforcing ribs, and the lining pipe 2 and the spring pipe body 1 are connected more firmly after the plastic-coated layer 3 flows in. Furthermore, the number of the support ribs 5 is four or more, and the support ribs 5 are symmetrically arranged.
Example 3
In addition to the embodiment 1, as shown in fig. 3, the lining pipe 2 has a tubular structure with thick ends and thin middle, and has radially extending ribs at the rear end, and axial flow channels are formed between adjacent ribs. The head end of the lining pipe 2 also comprises a cone structure, namely the head end of the lining pipe 2 is provided with a taper.
Example 4
On the basis of embodiment 1, as shown in fig. 4, the lining pipe 2 has a multi-step tubular structure with two thin ends and a thick middle part, in this embodiment, the middle part and the tail end of the lining pipe 2 are both provided with radially extending reinforcing ribs, the reinforcing ribs at the middle part are connected with the reinforcing ribs at the tail end through pipelines, and the outer diameters of the pipelines are smaller than those of the middle part and the tail end of the lining pipe 2. And an axial flow channel is formed between the adjacent reinforcing ribs. The head end of the lining pipe 2 also comprises a cone structure, namely the head end of the lining pipe 2 is provided with a taper.
Example 5
On the basis of the embodiment 1, as shown in fig. 5, the lining pipe 2 is a tubular structure including a step-variable diameter structure.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. A spring tube for an imaging catheter, characterized by: the spring tube comprises a spring tube body and an inner lining tube, wherein the front end of the inner lining tube is nested in an inner cavity at the tail end of the spring tube body and is in contact with the inner wall of the inner cavity of the spring tube body, the rear end of the inner lining tube is exposed out of the spring tube body, and plastic coating layers are arranged at the tail end of the spring tube body and the outer side of the inner lining tube;
the inner lining pipe is connected between the part close to the tail end of the spring pipe body and the tail end of the spring pipe body through an inner plastic coating, and the inner plastic coating is connected with the plastic coating.
2. The bourdon tube for an imaging catheter according to claim 1, wherein: the inner plastic-coated layer is formed by heating the material of the plastic-coated layer to flow into the gap between the spring tube body and the inner lining tube and cooling.
3. The bourdon tube for an imaging catheter according to claim 1, wherein: the outer diameter of the lining pipe close to the tail end part of the spring pipe body is smaller than that of the head end of the lining pipe.
4. The bourdon tube for an imaging catheter according to claim 1, wherein: the lining pipe is of a tubular structure with thick front end and thin rear end, a tubular structure with thick rear end and thin front end, a tubular structure with thick two ends and thin middle, a tubular structure with thin two ends and thick middle and multiple steps, and a tubular structure with sectional diameter change.
5. The bourdon tube for an imaging catheter according to claim 1, wherein: and a supporting rib extending outwards in the radial direction is arranged at the contact part of one side and/or the middle part of the tail end of the lining pipe and the spring pipe body.
6. The bourdon tube for an imaging catheter according to claim 2, wherein: the head of the lining pipe is of a cone structure.
7. The bourdon tube for an imaging catheter according to any one of claims 1 to 6, wherein: the outer diameter of the part of the inner lining pipe, which is far away from the tail part of the spring pipe body, is consistent with the inner diameter of the spring pipe body.
8. The bourdon tube for an imaging catheter according to any one of claims 1 to 6, wherein: the lining pipe is made of rigid thermoplastic plastics.
9. The bourdon tube for an imaging catheter according to claim 8, wherein: the lining pipe is made of polyethylene, polypropylene, polycarbonate, nylon, acrylonitrile-butadiene-styrene polymer or polyformaldehyde.
10. The bourdon tube for an imaging catheter according to claim 8, wherein: the material of the plastic coating layer is fluoroplastic with a self-lubricating effect.
CN201911394990.0A 2019-12-30 2019-12-30 Spring tube for imaging catheter Pending CN111134592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911394990.0A CN111134592A (en) 2019-12-30 2019-12-30 Spring tube for imaging catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911394990.0A CN111134592A (en) 2019-12-30 2019-12-30 Spring tube for imaging catheter

Publications (1)

Publication Number Publication Date
CN111134592A true CN111134592A (en) 2020-05-12

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Application Number Title Priority Date Filing Date
CN201911394990.0A Pending CN111134592A (en) 2019-12-30 2019-12-30 Spring tube for imaging catheter

Country Status (1)

Country Link
CN (1) CN111134592A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707376A (en) * 1992-08-06 1998-01-13 William Cook Europe A/S Stent introducer and method of use
US20030216616A1 (en) * 2002-05-17 2003-11-20 Krupa Robert J. Insertion tube device
CN101198296A (en) * 2005-06-13 2008-06-11 爱德华兹生命科学公司 Heart valve delivery system
CN201631249U (en) * 2010-03-10 2010-11-17 安瑞医疗器械(杭州)有限公司 Biopsy forceps of endoscope
CN102283728A (en) * 2011-06-28 2011-12-21 先健科技(深圳)有限公司 Lumen bracket conveying system
CN102470233A (en) * 2009-09-15 2012-05-23 泰尔茂株式会社 Catheter
CN108378823A (en) * 2018-02-13 2018-08-10 天津恒宇医疗科技有限公司 A kind of optical coherence tomography miniature probe of machine driving rotation
CN208404503U (en) * 2017-08-07 2019-01-22 珠海迈德豪医用科技有限公司 A kind of insert tube of endoscope protective device
CN208864479U (en) * 2017-11-02 2019-05-17 北京华亘安邦科技有限公司 The endoscope of waterproof is thermoae guide-tube structure
CN211796350U (en) * 2019-12-30 2020-10-30 深圳英美达医疗技术有限公司 Spring tube for imaging catheter

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707376A (en) * 1992-08-06 1998-01-13 William Cook Europe A/S Stent introducer and method of use
US20030216616A1 (en) * 2002-05-17 2003-11-20 Krupa Robert J. Insertion tube device
CN101198296A (en) * 2005-06-13 2008-06-11 爱德华兹生命科学公司 Heart valve delivery system
CN102470233A (en) * 2009-09-15 2012-05-23 泰尔茂株式会社 Catheter
CN201631249U (en) * 2010-03-10 2010-11-17 安瑞医疗器械(杭州)有限公司 Biopsy forceps of endoscope
CN102283728A (en) * 2011-06-28 2011-12-21 先健科技(深圳)有限公司 Lumen bracket conveying system
CN208404503U (en) * 2017-08-07 2019-01-22 珠海迈德豪医用科技有限公司 A kind of insert tube of endoscope protective device
CN208864479U (en) * 2017-11-02 2019-05-17 北京华亘安邦科技有限公司 The endoscope of waterproof is thermoae guide-tube structure
CN108378823A (en) * 2018-02-13 2018-08-10 天津恒宇医疗科技有限公司 A kind of optical coherence tomography miniature probe of machine driving rotation
CN211796350U (en) * 2019-12-30 2020-10-30 深圳英美达医疗技术有限公司 Spring tube for imaging catheter

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Inventor after: Li Xueming

Inventor before: Zhang Dan