CN114470480A - Accurate curved adjustable curved sheath pipe of accuse - Google Patents
Accurate curved adjustable curved sheath pipe of accuse Download PDFInfo
- Publication number
- CN114470480A CN114470480A CN202210060801.1A CN202210060801A CN114470480A CN 114470480 A CN114470480 A CN 114470480A CN 202210060801 A CN202210060801 A CN 202210060801A CN 114470480 A CN114470480 A CN 114470480A
- Authority
- CN
- China
- Prior art keywords
- sheath
- ring
- sheath tube
- developing
- bending
- 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
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Classifications
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0136—Handles therefor
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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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0108—Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
-
- 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
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
- A61M2025/015—Details of the distal fixation of the movable mechanical means
Abstract
The invention discloses an adjustable bending sheath tube capable of accurately controlling bending, wherein a connection node of a stay wire in the adjustable bending sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube; the developing ring is provided with a directional marker in the adjustable bent sheath tube, and the developing ring can display the bending state of the distal end of the sheath tube under X-ray. The invention solves the problem that the distal end of the sheath tube rotates to a certain degree when being bent.
Description
Technical Field
The invention belongs to the technical field of interventional medical instruments, and particularly relates to an adjustable bending sheath tube capable of accurately controlling bending.
Background
Minimally invasive interventional surgery is used for diagnosis and treatment of almost every organ system of the human body, and the main surgical procedure is to perform an operation by delivering diagnosis and treatment instruments to a target position through a guide wire, a sheath tube, and the like with the help of X-ray images.
In a common pull-wire bending-controlled sheath tube, a pull-wire ring is fixed at the distal end of the sheath tube, pull wires are fixed on the pull-wire ring at symmetrical positions and extend to the proximal end of the sheath tube, and the deflection of the distal sheath tube is controlled by controlling the movement of the pull wires through a proximal handle.
When the sheath tube body is in a natural state, the stay wire at one side is shortened, and the far end of the sheath tube bends towards the stay wire at the shortened side. Because human blood vessel meanders, under some circumstances, the operator can apply certain moment of torsion for the sheath pipe, and at this moment, it also can appear twisting reverse to act as go-between, and when the rethread acted as go-between was curved, the bending of sheath pipe distal end can take place the rotation of certain degree to lead to the art person can't the accurate accuse curved direction of holding the sheath pipe distal end, brought the difficulty for the accuracy of operation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an adjustable bending sheath tube with accurate bending control aiming at the defects in the prior art, and solve the problem that the distal end of the sheath tube rotates to a certain degree when being bent.
In order to solve the technical problems, the invention adopts the technical scheme that: a connection node of a stay wire in the adjustable bending sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube; the developing ring is provided with a directional marker in the adjustable bent sheath tube, and the developing ring can display the bending state of the distal end of the sheath tube under X-ray.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, the stay wire passes through the stay wire loop with the sheath pipe distal end and is connected, the waist of stay wire loop has the annular groove, the distal end of acting as go-between has the arc slider, and the arc slider inlays in the recess at stay wire loop waist.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, the both ends of the section that can bend of adjustable curved sheath pipe respectively are provided with one develop the ring.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, the development ring includes annular portion and fixes the development mark portion at annular portion one side intermediate position, development mark portion perpendicular to annular portion.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, two the development mark portion of development ring all is located the rear side of annular portion, one side of sheath pipe distal end is kept away from to rear side ring annular portion.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, two the development mark portion of development ring all is located the front side of annular portion, the front side ring annular portion is close to one side of sheath pipe distal end.
Above-mentioned accurate curved adjustable curved sheath pipe of accuse, one the development mark portion of development ring is located the front side of its annular portion, another the development mark portion of development ring is located the rear side of its annular portion, one of sheath pipe distal end is kept away from to rear side ring shape portion, one side that the distal end of sheath pipe is close to front side ring shape portion.
Compared with the prior art, the invention has the following advantages: the connection node of the pull wire in the adjustable bent sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube, namely on the pull wire ring at the distal end of the sheath tube, the pull wire is fixed in a way that the head end of the pull wire is movably embedded in the groove on the ring wall of the pull wire, so that the head end of the pull wire can slide along the groove on the ring wall of the pull wire when the bending is controlled by operation, and the torque energy stored on the pull wire is released by the sliding of the distal end of the pull wire when the tube body of the sheath tube is twisted, thereby realizing the direction consistency with the bending control direction of a handle. In addition, the visualized mark is designed on the circumference of the sheath, so that an operator can be helped to identify the bending control direction in the three-dimensional space of the sheath under the two-dimensional X-ray image. Further helping the operator to judge whether the distal end of the sheath tube generates in-plane distortion and bending control, thereby realizing accurate control.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the whole structure of the adjustable bending sheath tube of the present invention.
Fig. 2 is a schematic view of twisting and bending control of the sheath when the distal end of the pull wire is immovably fixed to the pull wire ring.
Fig. 3 is a schematic view showing an example in which the distal end of the pull wire is slidably fitted to the wall of the pull wire ring.
Fig. 4 is a schematic view of bending control of the sheath tube when the head end of the stay wire is slidably embedded in the annular wall of the stay wire.
Fig. 5 is a position diagram of the developing ring in the sheath normal state.
FIG. 6 is a view showing the position of the development ring in the state where the sheath tube is bent.
Fig. 7 is a structural view of a developing ring having directional directivity.
Fig. 8 is a diagram showing the relative positions of the two development rings after the sheath tube is ideally bent as seen in the X-ray two-dimensional image.
FIG. 9 is a diagram showing the relative positions of two imaging rings after a twisting and bending of the sheath as seen in the X-ray two-dimensional image.
FIG. 10 is a diagram showing the relative positions of two imaging rings after another twisting and bending of the sheath as viewed in the X-ray two-dimensional image.
1-stay wire; 2-sheath tube; 3-a handle; 4-pull wire ring; 5-an annular groove; 6-a slide block; 7-a developing ring; 7-1-ring section; 7-2-developing the mark portion.
Detailed Description
The precisely bending-controlled adjustable bending sheath proposed by the present invention is further described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, similar parts between the embodiments may be referred to each other, and different parts between the embodiments may also be used in combination with each other, which is not limited by the present invention.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
The utility model provides an adjustable curved sheath pipe of accurate accuse curved, the stay wire 1 in the adjustable curved sheath pipe can slide around the pipe wall of sheath pipe 2 distal end with the connected node of sheath pipe 2 distal end.
Specifically, as shown in fig. 1 and fig. 3, the adjustable bending sheath includes a handle 3 and a sheath 2, two sides of the sheath 2 are respectively provided with a pull wire 1, the pull wire 1 is a round wire or a flat wire, the distal end of the sheath 2 is provided with a pull wire ring 4, the distal end of the pull wire 1 is slidably connected to the pull wire ring 4, and the proximal end of the pull wire 1 extends to the handle 3 through a cavity in the body of the sheath 2 and is fixed.
In the conventional bending control sheath 2 of the pull wire 1, when bending control occurs, the pull wire 1 is in a state of tension, and if an operator further applies a certain torque to the sheath 2 at this time, since the distal end of the pull wire 1 is fixed to the distal end of the sheath 2, the pull wire 1 is twisted and rotated in the sheath 2 along the circumferential direction of the sheath 2, and the distal end of the sheath 2 is deflected in a three-dimensional space along with the bending control operation, so that a state shown in fig. 2 appears. In order to solve the problem, in the embodiment, as shown in fig. 3, an annular groove 5 is formed on the pull wire ring 4, a slider 6 capable of sliding along the annular groove 5 is arranged in the annular groove 5, and the distal end of the pull wire 1 is fixed on the slider 6, so that when the sheath tube 2 is twisted, the slider 6 slides, the pull wire 1 releases torque energy, and the problem of fig. 2 is avoided, and thus the state of the pull wire 1 is as shown in fig. 4. The sliding connection mode of the far end of the pull wire 1 and the pull wire ring 4 can be various, and the structure can be similar to a key ring pendant or a curtain pendant, and can be expanded.
As shown in fig. 5 and 6, in the present embodiment, both ends of the bendable section of the bendable sheath 2 are provided with developing rings 7 having directional directivity. The structure of the development ring 7 is specifically shown in fig. 7.
In this embodiment, the developing ring 7 includes an annular portion 7-1 and a developing marker portion 7-2 fixed at a position intermediate on one side of the annular portion 7-1.
The developing mark can be made of metal (gold, tungsten, tantalum and bismuth) or powder (tungsten powder, barium sulfate and bismuth oxide) and made of thermoplastic polymer. The developed marks may be in various distinguishable shapes. The development marks having directional directivity may be various distinguishable shapes. Other distinguishable shapes, in this example perpendicular to the long direction of the annular portion of the developer ring, may be triangles, arrows, etc. that are distinguishable under X-rays.
In the present embodiment, the developing ring 7 has a "T" shape in the X-ray two-dimensional image, and the distortion of the sheath 2 is recognized based on the relative positions of the two protruding portions.
In the present embodiment, the development mark portions 7-2 of the two development rings 7 are located on the rear side of the annular portion 7-1, which is the side of the annular portion 7-1 away from the distal end of the sheath 2.
It will be appreciated by those skilled in the art that the visualization mark portions of both of the visualization rings may also be located on the anterior side of the ring portion, which is the side of the ring portion near the distal end of the sheath; or the developing mark part of one developing ring is positioned at the front side of the annular part of the developing ring, and the developing mark part of the other developing ring is positioned at the rear side of the annular part of the developing ring.
In practical use, ideally, after the distal end of the sheath 2 is bent, the relative positions of the two imaging rings 7 appear as shown in fig. 8 in the X-ray two-dimensional image, and when the conditions shown in fig. 9 and 10 occur, the sheath 2 is twisted when bent, and at this time, the operator can correct the deflection of the sheath 2 according to the requirement, thereby realizing more accurate bending control.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides an accurate curved adjustable curved sheath pipe of accuse which characterized in that: the connection node of the stay wire in the adjustable bent sheath tube and the distal end of the sheath tube can slide around the tube wall of the distal end of the sheath tube; the developing ring is provided with a directional marker in the adjustable bent sheath tube, and the developing ring can display the bending state of the distal end of the sheath tube under X-ray.
2. The bending-accurate control adjustable sheath according to claim 1, wherein: the pull wire is connected with the far end of the sheath tube through a pull wire ring, the waist of the pull wire ring is provided with an annular groove, the far end of the pull wire is provided with an arc-shaped sliding block, and the arc-shaped sliding block is embedded in the groove at the waist of the pull wire ring.
3. The bending-accurate control adjustable sheath according to claim 1, wherein: the two ends of the bendable section of the adjustable bent sheath tube are respectively provided with one developing ring.
4. The bending-accurately controlled adjustable sheath according to claim 1 or 3, wherein: the developing ring comprises an annular part and a developing mark part fixed in the middle of one side of the annular part, and the developing mark part is perpendicular to the annular part.
5. The bending-accurate control adjustable sheath according to claim 4, wherein: the developing mark parts of the two developing rings are all located on the rear side of the annular part, and the rear side of the annular part is far away from one side of the far end of the sheath tube.
6. The bending-accurate control adjustable sheath according to claim 4, wherein: the developing mark parts of the two developing rings are all located on the front side of the annular part, and the front side ring-shaped part is close to one side of the far end of the sheath tube.
7. The bending-accurate control adjustable sheath according to claim 4, wherein: one the development mark part of development ring is located the front side of its annular portion, another the development mark part of development ring is located the rear side of its annular portion, one side that the sheath pipe distal end was kept away from to rear side ring-shaped portion, one side that the front side ring-shaped portion is close to the sheath pipe distal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060801.1A CN114470480A (en) | 2022-01-19 | 2022-01-19 | Accurate curved adjustable curved sheath pipe of accuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060801.1A CN114470480A (en) | 2022-01-19 | 2022-01-19 | Accurate curved adjustable curved sheath pipe of accuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114470480A true CN114470480A (en) | 2022-05-13 |
Family
ID=81473238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060801.1A Pending CN114470480A (en) | 2022-01-19 | 2022-01-19 | Accurate curved adjustable curved sheath pipe of accuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114470480A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863079A (en) * | 1994-08-18 | 1996-03-08 | Ricoh Co Ltd | Rotary developing device |
| US20090240110A1 (en) * | 2008-03-19 | 2009-09-24 | Tetsumaru MIYAWAKI | Endoscope |
| US20140148759A1 (en) * | 2012-11-28 | 2014-05-29 | Hansen Medical, Inc. | Catheter having unirail pullwire architecture |
| CN109984823A (en) * | 2018-01-03 | 2019-07-09 | 杭州启明医疗器械股份有限公司 | It is a kind of to adjust curved sheath and the transportation system using the curved sheath of the tune |
| CN213283248U (en) * | 2020-06-22 | 2021-05-28 | 康沣生物科技(上海)有限公司 | Adjustable bent sheath pipe |
-
2022
- 2022-01-19 CN CN202210060801.1A patent/CN114470480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863079A (en) * | 1994-08-18 | 1996-03-08 | Ricoh Co Ltd | Rotary developing device |
| US20090240110A1 (en) * | 2008-03-19 | 2009-09-24 | Tetsumaru MIYAWAKI | Endoscope |
| US20140148759A1 (en) * | 2012-11-28 | 2014-05-29 | Hansen Medical, Inc. | Catheter having unirail pullwire architecture |
| CN109984823A (en) * | 2018-01-03 | 2019-07-09 | 杭州启明医疗器械股份有限公司 | It is a kind of to adjust curved sheath and the transportation system using the curved sheath of the tune |
| CN213283248U (en) * | 2020-06-22 | 2021-05-28 | 康沣生物科技(上海)有限公司 | Adjustable bent sheath pipe |
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