CN111134592B - A spring tube for imaging catheter - Google Patents
A spring tube for imaging catheter Download PDFInfo
- Publication number
- CN111134592B CN111134592B CN201911394990.0A CN201911394990A CN111134592B CN 111134592 B CN111134592 B CN 111134592B CN 201911394990 A CN201911394990 A CN 201911394990A CN 111134592 B CN111134592 B CN 111134592B
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- spring tube
- spring
- tube
- tube body
- rear end
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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
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- 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)
- Medical Informatics (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (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)
- Laminated Bodies (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
本发明提供了一种用于成像导管的弹簧管，其包括弹簧管本体和内衬管，所述内衬管的前端嵌套在弹簧管本体尾端的内腔中，与弹簧管本体内腔的内壁接触，所述内衬管的后端露出弹簧管本体，所述弹簧管本体的尾端与内衬管的外侧设有包塑层；所述内衬管在靠近弹簧管本体尾端的部分与弹簧管本体的尾端之间通过内包塑层连接，所述内包塑层与包塑层连接。采用本发明的技术方案，弹簧管的后端的包塑结构在兼顾强度保护弹簧管在运动时不受其他密封件的挤压的同时，还具有自润滑效果，保证弹簧管在密封件的挤压下仍能均匀传动，将线接触改变为面接触，不产生应力集中点；且提高了密封结构之间的润滑性。
The present invention provides a spring tube for an imaging catheter, which comprises a spring tube body and an inner liner tube, wherein the front end of the inner liner tube is nested in the inner cavity of the rear end of the spring tube body and contacts the inner wall of the inner cavity of the spring tube body, the rear end of the inner liner tube exposes the spring tube body, and the rear end of the spring tube body and the outer side of the inner liner tube are provided with a plastic coating layer; the inner liner tube is connected to the rear end of the spring tube body by an inner plastic coating layer between the part close to the rear end of the spring tube body and the rear end of the spring tube body, and the inner plastic coating layer is connected to the plastic coating layer. By adopting the technical solution of the present invention, the plastic coating structure at the rear end of the spring tube not only takes into account the strength to protect the spring tube from being squeezed by other seals during movement, but also has a self-lubricating effect, ensuring that the spring tube can still be evenly transmitted under the squeeze of the seal, changing the line contact to the surface contact, and not generating stress concentration points; and improving the lubricity between the sealing structures.
Description
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 core components of the imaging catheter, and the spring tube performs high-speed pulling and pushing, rotating and other movements in the lumen of the catheter when the imaging catheter works. In order to maintain the transmission performance of the spring tube in the moving 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 weld to concentrate at the port location of the stainless steel tube, and stress also concentrates at the weld during high speed rotation and pullback and pushing of the spring tube, resulting in a very easy break in the weld, resulting in failure of the imaging catheter to 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 this regard, the invention adopts the following technical scheme:
The utility model provides a spring pipe for imaging catheter, its includes spring pipe body and lining pipe, the front end nest of lining pipe is in the inner chamber of spring pipe body tail end, with the inner wall contact of spring pipe body inner chamber, the rear end of lining pipe exposes the spring pipe body, the tail end of spring pipe body is equipped with the plastic coating layer with the outside of lining pipe.
Further, the spring tube body is a multi-layer spring tube body.
By adopting the technical scheme, the lining pipe is nested in the inner cavity of the multi-layer spring pipe, the inside of the lining pipe is hollow, so that an optical fiber or a cable can pass through the lining pipe, and the lining pipe supports the spring pipe body, so that the lining pipe can still be kept straight during injection molding, and cannot be deformed due to plastic flow impact. The plastic coating enhances the hardness of the tail end of the spring tube, so that the spring tube is not deformed under the extrusion of the sealing piece.
As a further improvement of the invention, the lining pipe is connected between the part near 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 coating layer is coated outside the lining pipe and the multi-layer spring pipe, the length is not shorter than that of the lining pipe, and the inner plastic coating layer is positioned between the lining pipe and the spring pipe body, so that the tight connection among the spring pipe body, the lining pipe and the plastic coating layer is realized.
As a further improvement of the invention, a gap is arranged between the part close to the tail end of the spring tube body and the inner wall of the inner cavity of the spring tube body, and the inner plastic coating layer is formed after cooling by heating the material of the plastic coating layer to flow into the gap between the spring tube body and the inner lining tube. By adopting the technical scheme, plastic flow of the plastic coating 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 tube near the tail end portion of the spring tube body is smaller than the outer diameter of the head end of the lining tube.
As a further improvement of the invention, the lining pipe is 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 a thin middle, a tubular structure with thick two ends and a thick middle and multiple steps or a tubular structure with a sectionally variable diameter. Furthermore, the lining pipe can be in a structure with other similar characteristics being 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 in contact with the spring pipe body, is provided with a supporting rib which extends outwards in the radial direction. Further, 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 liner tube is of conical configuration. The head end has a certain taper, so that the lining pipe can enter the spring pipe more easily, and the processing is convenient.
As a further improvement of the invention, the outer diameter of the lining pipe at a part far 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 inner lining pipe is thicker than the head part at a section far away from the tail part of the spring pipe body, 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 be kept straight after plastic coating, and the inner lining pipe and the inner hole of the spring pipe can be ensured to be concentric. 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 hard thermoplastic plastics.
As a further improvement of the invention, the lining pipe and the plastic coating layer are made of Polyethylene (PE), polypropylene (PP), polycarbonate (PC), nylon (PA), acrylonitrile-butadiene-styrene (ABS) or Polyoxymethylene (POM).
As a further improvement of the invention, the plastic coating layer is made of fluoroplastic with a self-lubricating effect. Further, the plastic coating 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 the self-lubricating effect and well replaces a stainless steel tube while taking strength into consideration to protect the spring tube from being extruded by other sealing elements during movement. The structure can ensure that the spring tube can still uniformly drive under the extrusion of the sealing element, change the line contact into the surface contact, not generate stress concentration points, and improve the lubricity between the sealing structures, so that the spring tube has both the smoothness during high-speed rotation and the sealing performance 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 structural view of the lining tube of embodiment 2 of the present invention.
Fig. 3 is a schematic structural view of the lining tube of embodiment 3 of the present invention.
Fig. 4 is a schematic structural view of the lining tube of embodiment 4 of the present invention.
Fig. 5 is a schematic structural view of the lining tube of embodiment 5 of the present invention.
The reference numerals include:
1-spring tube body, 2-lining tube, 3-plastic coating layer, 4-inner plastic coating layer and 5-supporting 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 a lining tube 2, wherein the front end of the 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 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 lining tube 2. The 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 lining pipe 2 is provided with a gap between the part close to the tail end of the spring pipe body 1 and the inner wall of the inner cavity of the spring pipe body 1, and the inner plastic coating layer 4 is formed after cooling the gap between the spring pipe body 1 and the lining pipe 2 by heating the material of the plastic coating layer 3. The head end of the lining pipe 2 is positioned in the spring pipe body 1, and the tail end is positioned outside the spring pipe body 1 and is at a certain distance from the tail end face of the spring pipe body 1. Further, the outer diameter of the lining pipe 2 at a part far 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 multi-layer spring tube body 1. In this embodiment, the lining pipe 2 has a tubular structure with a thick front end and a thin rear end. The outer diameter of the lining pipe 2 at a 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 lining pipe 2 is made of Polyethylene (PE), polypropylene (PP), polycarbonate (PC), nylon (PA), acrylonitrile-butadiene-styrene (ABS) or Polyoxymethylene (POM). The plastic coating layer 3 is made of FEP and PTFE.
Example 2
On the basis of embodiment 1, as shown in fig. 2, the lining pipe 2 has a tubular structure with a thick rear end and a thin front end, and the front end of the lining pipe 2 further comprises a cone structure, i.e. the front end of the lining pipe 2 is provided with a taper. The tail end of the lining pipe 2 is provided with radially extending reinforcing ribs, gaps are reserved between adjacent reinforcing ribs, and after the plastic coating layer 3 flows in, the lining pipe 2 and the spring pipe body 1 are connected more firmly. Further, the number of the supporting ribs 5 is four or more, and the supporting ribs 5 are symmetrically arranged.
Example 3
On the basis of embodiment 1, as shown in fig. 3, the lining tube 2 has a tubular structure with thick ends and thin middle, and radially extending reinforcing ribs are arranged at the rear end, and an axial flow channel is formed between 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 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, in this embodiment, the middle and the tail ends of the lining pipe 2 are both provided with radially extending reinforcing ribs, the reinforcing ribs at the middle are connected with the reinforcing ribs at the tail ends through pipelines, and the outer diameter of the pipelines is smaller than the outer diameters of the middle and the tail ends of the lining pipe 2. An axial flow passage 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 example 1, as shown in fig. 5, the lining pipe 2 has a tubular structure including a segmented diameter-variable structure.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394990.0A CN111134592B (en) | 2019-12-30 | 2019-12-30 | A spring tube for imaging catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911394990.0A CN111134592B (en) | 2019-12-30 | 2019-12-30 | A spring tube for imaging catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111134592A CN111134592A (en) | 2020-05-12 |
| CN111134592B true CN111134592B (en) | 2024-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911394990.0A Active CN111134592B (en) | 2019-12-30 | 2019-12-30 | A spring tube for imaging catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111134592B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102470233A (en) * | 2009-09-15 | 2012-05-23 | 泰尔茂株式会社 | Catheter |
| 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 |
Family Cites Families (8)
| 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 |
| US6991603B2 (en) * | 2002-05-17 | 2006-01-31 | Optim, Inc. | Insertion tube device |
| US7780723B2 (en) * | 2005-06-13 | 2010-08-24 | Edwards Lifesciences Corporation | 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 |
| CN102283728B (en) * | 2011-06-28 | 2014-09-10 | 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 |
| CN108378823B (en) * | 2018-02-13 | 2023-04-28 | 天津恒宇医疗科技有限公司 | Mechanical transmission rotary optical coherence tomography miniature probe |
-
2019
- 2019-12-30 CN CN201911394990.0A patent/CN111134592B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102470233A (en) * | 2009-09-15 | 2012-05-23 | 泰尔茂株式会社 | Catheter |
| 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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| Publication number | Publication date |
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| CN111134592A (en) | 2020-05-12 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Xueming Inventor before: Zhang Dan |
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