CN116262052A - Traction ring, sheath tube and interventional instrument - Google Patents
Traction ring, sheath tube and interventional instrument Download PDFInfo
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- CN116262052A CN116262052A CN202111520318.9A CN202111520318A CN116262052A CN 116262052 A CN116262052 A CN 116262052A CN 202111520318 A CN202111520318 A CN 202111520318A CN 116262052 A CN116262052 A CN 116262052A
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- 230000004308 accommodation Effects 0.000 description 18
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- 238000000034 method Methods 0.000 description 5
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0293—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with ring member to support retractor elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0218—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors for minimally invasive surgery
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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
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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
- A61M25/0194—Tunnelling catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/0034—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
-
- 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
- A61M25/0194—Tunnelling catheters
- A61M2025/0197—Tunnelling catheters for creating an artificial passage within the body, e.g. in order to go around occlusions
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Abstract
The invention discloses a traction ring, a sheath tube and an interventional instrument, wherein the traction ring is used for connecting a traction wire and comprises a ring body, the ring body is provided with a proximal ring surface and a distal ring surface which are opposite to each other, and two opposite peripheral walls positioned between the proximal ring surface and the distal ring surface, a first accommodating groove is concavely formed in one peripheral wall of the ring body, an accommodating channel communicated with the first accommodating groove is concavely formed in the proximal ring surface of the ring body, a hooking part for hooking the traction wire is formed in the first accommodating groove, and the traction wire placed in the first accommodating groove penetrates through the accommodating channel after being hooked on the hooking part. In the traction ring, the sheath tube and the interventional instrument, the traction wire is hooked on the hooking part and then is in surface contact with the hooking part, so that the reliability is ensured; meanwhile, the traction wire is led out from the accommodating channel on the ring body after being arranged in the first accommodating groove, so that at least part of the traction wire is accommodated in the ring body, the thickness of the whole structure is effectively reduced, and the thin-wall design is realized.
Description
Technical Field
The invention relates to the technical field of interventional medical instruments, in particular to a traction ring, a sheath tube and an interventional instrument.
Background
The medical sheath is used for establishing a channel, conveying or recycling instruments, inputting medicines or exporting body fluids and the like in minimally invasive interventional diagnosis and treatment operations; the adjustable bent sheath tube has a distal end bending adjustable function, and can quickly and reliably reach the target lesion position so as to reduce the operation time. In order to accurately adjust the angle of the distal end of the tube body before and during the operation, a doctor can repeatedly adjust the bending angle to adapt to the complex anatomical structures of different human body inner lumens, so that the traction system of the adjustable bending sheath tube is required to have better traction fatigue performance. The tensile strength, tensile fatigue strength and impact on tubing wall thickness of the traction system are critical in adjustable bend sheaths.
Referring to fig. 1, in the conventional traction system, a traction wire 20 'is folded in half and then is sleeved on a fixing ring 10', and the traction wire 20 'is stressed by a "point" acting on the fixing ring 10' after being pulled, so that the fixing ring is easily broken or the folded part of the traction wire is broken, and the reliability is poor. For this reason, another connection method is proposed, and referring to fig. 2, the traction wire 20 "is connected through the hole of the fixing ring 10", and although this connection method has a certain reliability, the thickness of the whole structure is larger than that of the fixing ring, which results in an increase of the wall thickness of the sheath tube body.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a traction ring, a sheath tube and an interventional instrument which can ensure reliability and realize thin walls.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a traction ring for connect the traction wire, including a ring body, the ring body has relative proximal end anchor ring and distal end anchor ring, and is located proximal end anchor ring with relative perisporium between the distal end anchor ring, a week wall indent of ring body is equipped with first holding tank, proximal end anchor ring indent of ring body be equipped with the communicating accommodation channel of first holding tank, be formed with in the first holding tank and be used for hooking the portion of hooking of traction wire, place traction wire in the first holding tank hook in hook behind the portion from the accommodation channel passes.
In one embodiment, the accommodating channel is a second accommodating groove penetrating through the other peripheral wall of the ring body, the ring body is further provided with a through hole for communicating the first accommodating groove and the second accommodating groove, and the traction wire placed in the first accommodating groove is hooked on the hooking part and then passes through the through hole to enter the second accommodating groove.
In one embodiment, the first receiving groove and the second receiving groove axially overlap to form the perforation through which the pulling wire can pass.
In one embodiment, the second accommodating groove is an arc-shaped groove concavely formed.
In one embodiment, the first receiving groove is partially disposed on the circumferential wall of the ring body, and the hooking portion includes a protrusion formed in the first receiving groove.
In one embodiment, the surface of the lug, which is hooked with the traction wire, is an arc surface.
In one embodiment, a recess for limiting the traction wire hung on the protrusion is provided at the top of the protrusion, and/or a blocking part for limiting the traction wire hung on the protrusion is formed by extending axially from a surface of one side of the protrusion away from the bottom wall of the first accommodating groove.
In one embodiment, a set of traction structures is formed by the first receiving groove, the receiving channel and the protrusion, and the traction structures are arranged in a plurality of sets at intervals along the circumferential direction of the ring body.
In one embodiment, the first accommodating groove is circumferentially arranged on the outer peripheral wall of the ring body, so that the formed first accommodating groove is an annular groove, and the annular wall of the annular groove forms the hooking portion.
In one embodiment, the surface of the junction of the first receiving groove and the receiving channel, which is in contact with the traction wire, is cambered.
In one embodiment, the accommodating channel comprises a first sub-channel and a second sub-channel which are circumferentially arranged at intervals, and the first sub-channel and the second sub-channel are communicated with the first accommodating groove; wherein,,
when the accommodating channel is a second accommodating groove formed through the other peripheral wall of the ring body, the first sub-channel and the second sub-channel are respectively a first sub-accommodating groove and a second sub-accommodating groove communicated with the first accommodating groove; wherein,,
when the first accommodating groove and the second accommodating groove axially overlap to form the perforation through which the traction wire can pass, the first sub accommodating groove and the second sub accommodating groove axially overlap with the first accommodating groove respectively to form a first perforation and a second perforation through which two ends of the traction wire can pass respectively; wherein,,
when the second accommodating groove is an arc-shaped groove formed by concave arrangement, the first sub accommodating groove and the second sub accommodating groove are a first arc-shaped groove and a second arc-shaped groove formed by concave arrangement respectively.
In one embodiment, when the hooking portion includes a protrusion formed in the first receiving groove, the protrusion is interposed between the first sub-channel and the second sub-channel.
The other technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a sheath pipe, including the body, locate on the body draw ring and draw the silk as above, be equipped with in the body with draw the passageway of ring hold passageway intercommunication, follow hold the passageway pass draw the silk and get into hold the passageway.
The invention solves the technical problems by adopting the following technical scheme:
the interventional instrument is characterized by comprising the sheath tube, a handle connected to the proximal end of the sheath tube and a bending mechanism arranged in the handle, wherein a traction wire entering the accommodating channel penetrates out of the traction channel and then is connected with the bending mechanism.
In summary, in the traction ring, the sheath tube and the interventional device, the traction wire is hooked on the hooking part and then is in surface contact with the hooking part, so that the reliability is ensured; meanwhile, the traction wire is led out from the accommodating channel on the ring body after being arranged in the first accommodating groove, so that at least part of the traction wire is accommodated in the ring body, the thickness of the whole structure is effectively reduced, and the thin-wall design is realized. On the premise that the sheath tube has the same outer diameter, the invention can realize larger inner diameter of the sheath tube and convey larger-specification instruments; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a drawing of one manner of securing a traction wire to a traction ring in a prior art traction system;
FIG. 2 is another alternative attachment of a traction wire to a traction ring in a prior art traction system;
FIG. 3 is a schematic exterior structural view of one embodiment of an exemplary traction ring of the present invention;
FIG. 4 is a schematic view of the internal structure of the traction ring shown in FIG. 3;
FIG. 5 is a schematic view of the attachment of the traction wire to the traction ring shown in FIG. 3;
FIG. 6 is a schematic top view of the traction ring shown in FIG. 3;
FIG. 7 is a schematic illustration of the traction ring shown in FIG. 3 with perforations formed therein;
FIG. 8 is a schematic illustration of a pull wire passing through a perforation in the pull ring shown in FIG. 3;
FIG. 9 is a schematic view of a sheath including the traction ring shown in FIG. 3;
FIG. 10 is a schematic exterior structural view of another embodiment of an exemplary traction ring of the present invention;
FIG. 11 is a schematic view of the internal structure of the traction ring shown in FIG. 10;
fig. 12 is a schematic view of a sheath including the traction ring shown in fig. 10.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the field of interventional medical devices, the end of a medical device implanted in a human or animal body or a delivery system for delivering the medical device, which is closer to an operator, is generally referred to as a "proximal end", the end farther from the operator is referred to as a "distal end", and the "proximal end" and the "distal end" of any component of the medical device or the delivery system are defined according to this principle. "axial" generally refers to the longitudinal direction of a medical device when delivered, and "radial" generally refers to the direction of the medical device perpendicular to its "axial" direction, and defines the "axial" and "radial" directions of any component of the medical device in accordance with this principle.
Example 1
Referring to fig. 3 and 10, the present invention illustratively provides a pull ring 100 for connecting a pull wire 200, the pull ring 100 comprising a ring body 10, the ring body 10 having opposite proximal and distal annular surfaces 10a and 10b, and opposite peripheral walls between the proximal and distal annular surfaces 10a and 10b, a first receiving groove being recessed in one of the peripheral walls of the ring body 10, and a receiving channel in communication with the first receiving groove being recessed in the proximal annular surface 10a of the ring body 10, wherein communication herein may refer to direct communication or indirect communication. The first accommodating groove is internally provided with a hooking part for hooking the traction wire 200, and the traction wire 200 arranged in the first accommodating groove is hooked on the hooking part and then passes through the accommodating channel to be led out. The traction wire 200 is hooked on the hooking part and then is in surface contact with the hooking part, so that the reliability is ensured; meanwhile, the traction wire 200 is led out from the accommodating channel on the ring body 10 after being placed in the first concave accommodating groove, so that at least part of the traction wire 200 is accommodated in the ring body 10, the thickness of the whole structure is effectively reduced, and the thin-wall design is realized. It should be noted that, the drawing wire 200 disposed in the first accommodating groove in this embodiment is only to be drawn out from the accommodating channel after being hooked on the hooking portion, and should not be limited to the structure of the drawing ring 100 according to the embodiment, for example, a manner of hooking may be implemented by passing an extending end of the drawing wire 200 from the accommodating channel through the hooking portion in the first accommodating groove, and then bending back to the accommodating channel after being hooked on the hooking portion, where hooking and passing through the accommodating channel can still be implemented.
Further, since the axial direction of the ring body 10 is provided with the channel perforation, which has high process requirements and high difficulty, and the overall strength of the ring body 10 is weak after the channel perforation is provided, in other embodiments, the receiving channel is a second receiving groove penetrating through another peripheral wall of the ring body, and the radial thickness direction of the ring body 10 is further provided with a perforation for communicating the first receiving groove and the second receiving groove, and the traction wire placed in the first receiving groove is hooked on the hooking portion and then passes through the perforation to enter the second receiving groove. According to the embodiment, the accommodating channel is arranged to be the second accommodating groove penetrating through the other peripheral wall of the ring body, and the first accommodating groove and the second accommodating groove are communicated through the radial perforation, so that the traction wire arranged in the first accommodating groove is bent, passes through the perforation and enters the second accommodating groove, at least part of two sides of the traction wire is arranged in the first accommodating groove and the second accommodating groove respectively, the thin-wall design of the ring body is facilitated, the integral strength of the traction ring with the accommodating channel is guaranteed, and meanwhile, the process difficulty is greatly reduced.
In other embodiments, as one implementation of the perforation described above, the first receiving groove and the second receiving groove axially overlap to form a perforation through which the pulling wire can pass. The perforation is so set up, has simplified the technological process that sets up the perforation on the one hand, and on the other hand first holding tank and second holding tank have the overlapping in radial sunken degree of depth, can make its inside can hold more volume's traction wire to further realize the thin wall design.
Referring to fig. 4, preferably, since the second receiving groove is also provided in a concave manner, in order to avoid that the concave second receiving groove causes the local strength of the ring body to be weakened, and simultaneously ensure that the second receiving groove has a larger receiving volume, the second receiving groove is an arc-shaped groove formed by concave arrangement.
Illustratively, the receiving channel includes first and second circumferentially spaced apart sub-channels, each of which communicates with the first receiving slot; when the accommodating channel is a second accommodating groove formed through the other peripheral wall of the ring body, the first sub-channel and the second sub-channel are respectively a first sub-accommodating groove and a second sub-accommodating groove which are communicated with the first accommodating groove; when the first accommodating groove and the second accommodating groove are overlapped in the axial direction to form a perforation through which the traction wire can pass, the first sub accommodating groove and the second sub accommodating groove are respectively overlapped in the axial direction with the first accommodating groove to form a first perforation and a second perforation through which two ends of the traction wire can respectively pass; when the second accommodating groove is an arc-shaped groove formed by concave arrangement, the first sub accommodating groove and the second sub accommodating groove are a first arc-shaped groove and a second arc-shaped groove formed by concave arrangement respectively.
Example 2
The present invention provides, on the basis of the traction ring 100 provided in the above embodiment 1, an exemplary sheath tube, which includes a tube body, the traction ring 100 as described in embodiment 1 provided on the tube body, and a traction wire 200, wherein a traction channel communicating with the accommodation channel of the traction ring 100 is provided in the tube body, and the traction wire 200 passing through the accommodation channel enters the accommodation channel. The traction ring 100 described in embodiment 1 is selected so that the invention can achieve larger inner diameter of the sheath and deliver larger specification instruments on the premise of the same outer diameter of the sheath; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels.
Example 3
Based on the traction ring provided in the above embodiment 1 and the sheath provided in the embodiment 2, the present invention provides an interventional device, which includes the sheath of the embodiment 2, a handle connected to the proximal end of the sheath, and a bending mechanism disposed in the handle, wherein the traction wire 200 entering the accommodating channel passes through the traction channel and then is connected to the bending mechanism, and the bending mechanism moves under the driving of an external force to pull and release the traction wire 200, so as to realize the bending of the sheath.
Example 4
This embodiment proposes a specific implementation of the traction ring 100 based on the traction ring 100 provided in embodiment 1. Specifically, referring to fig. 3, the first receiving groove of the present embodiment is partially disposed on the peripheral wall of the ring body 10 to form a partial first receiving groove 21, and the hooking portion includes a protrusion 41 formed in the first receiving groove. That is, the protrusion 41 is formed in the partial first receiving groove 21, and the proximal end surface 10a of the ring body 10 is concavely provided with a receiving channel communicating with the partial first receiving groove 21, wherein the communication means direct communication or indirect communication, and the traction wire 200 disposed in the partial first receiving groove 21 is hooked on the hooking portion and then passes through the receiving channel.
Wherein the ring body 10 has opposed first and second peripheral walls between the proximal and distal annular faces 10a, 10b. When the first peripheral wall is an inner peripheral wall, the second peripheral wall is an outer peripheral wall; the first peripheral wall is an outer peripheral wall, and the second peripheral wall is an inner peripheral wall. It will be appreciated that, in this embodiment, in terms of implementing the bending adjustment function, the partial first receiving groove 21 may be provided on the first peripheral wall or the second peripheral wall of the ring body 10, that is, the partial first receiving groove 21 may be provided on the inner peripheral wall or may also be provided on the outer peripheral wall, and may be specifically selected as required. In this embodiment, in order to facilitate the slotting and the hooking portion arrangement, as shown in fig. 3, a partial first receiving groove 21 is provided on the outer peripheral wall of the ring body 10. It should also be appreciated that the distal end of the partial first receiving groove 21 may extend through the distal annulus 10b of the ring body 10 or may not extend through the distal annulus 10b of the ring body 10, so long as the pull wire 200 is disposed within the partial first receiving groove 21 and is hooked on the projection 41.
With continued reference to fig. 3, in order to better adapt to the flexible form of the traction wire 200 and attach to the flexible form, the stress area is enlarged, the surface of the protrusion 41, where the traction wire 200 is hooked, is an arc surface, that is, the top of the protrusion 41 in fig. 3 is in an arc shape, and in a contact manner of opposite edges and corners, the arc-shaped contact surface can reduce abrasion more effectively, reduce the failure risk of the traction wire and the fixing ring, and make the connection between the traction wire and the fixing ring more reliable.
Further, in order to prevent the traction wire 200 hooked on the bump 41 from being separated from the bump 41, as an anti-falling embodiment, a recess 41a for limiting the traction wire 200 hooked thereon is provided at the top of the bump 41. As another anti-drop embodiment, a blocking portion 41b for limiting the traction wire 200 hooked thereon is formed to extend axially from a side surface of the projection 41 away from the bottom wall of the first receiving groove. It is also possible that in other embodiments, the two anti-disengagement modes may be combined, i.e. both the recess 41a and the blocking portion 41b are provided. The concave part 41a and the blocking part 41b both carry out radial limit on the traction wire hooked on the convex block 41, so that the detachment failure of the traction wire is avoided, and the reliability of hooking is ensured.
As an implementation manner of the accommodating channel in this embodiment, the accommodating channel is a through hole concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10, and the through hole is communicated with the local first accommodating groove 21, where the communication may refer to direct communication or indirect communication, and the traction wire 200 placed in the local first accommodating groove 21 passes through the through hole after being hooked on the hooking portion. Note that the through hole formed in the ring body 10 herein means that the through hole does not penetrate any peripheral wall of the ring body 10.
As another implementation of the receiving channel in this embodiment, the receiving channel is a second receiving groove concavely formed on the ring body 10 from the proximal end surface 10a of the ring body 10, and the second receiving groove penetrates through the other peripheral wall of the ring body 10. The peripheral wall through which the second accommodation groove penetrates is another peripheral wall opposite to the peripheral wall provided with the partial first accommodation groove 21, that is, when the partial first accommodation groove 21 is provided on the first peripheral wall, the second accommodation groove penetrates the second peripheral wall; when the partial first receiving groove 21 is provided on the second peripheral wall, the second receiving groove penetrates the first peripheral wall. I.e. the partial first receiving groove 21 is opposite to the second receiving groove in the thickness direction of the ring body 10. The second accommodating groove penetrates through the other peripheral wall of the ring body 10, so that the accommodating channel is more beneficial to arrangement, the manufacturing process is simpler and easier to realize, the requirement on the wall thickness of the ring body 10 is lower, and the thin-wall arrangement is more beneficial.
Further, as shown in fig. 3 to 5, the accommodating channel includes a first sub-channel 31a and a second sub-channel 31b that are circumferentially spaced apart, the first sub-channel 31a and the second sub-channel 31b are all communicated with the local first accommodating groove 21, two extension ends of the traction wire 200 disposed in the local first accommodating groove 21 are respectively penetrated out from the first sub-channel 31a and the second sub-channel 31b after the traction wire is hooked on the hooking portion, and two extension sections of the traction wire 200 are respectively independent, so that the problem of product failure caused by mutual winding and abrasion of the traction wires 200 penetrated from one accommodating channel is avoided. Preferably, as shown in fig. 3, in other embodiments, when the hooking portion is a protrusion 41 formed in the first accommodating groove, the protrusion 41 is interposed between the first sub-channel 31a and the second sub-channel 31b, so that the traction wire is more stressed uniformly, and the traction is more stable.
Wherein, based on the above arrangement of the accommodation channels, when the accommodation channels are through holes concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10, the first sub-channels 31a and the second sub-channels 31b may be first through holes concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10 and second through holes, which are both communicated with the partial first accommodation groove 21. Then, after the traction wire 200 disposed in the partial first receiving groove 21 is hooked on the hooking portion, two extending ends of the traction wire respectively pass through the first through hole and the second through hole.
When the accommodating channel is a second accommodating groove concavely formed on the ring body 10 from the proximal end annular surface 10a of the ring body 10, the first sub-channel 31a and the second sub-channel 31b are respectively a first sub-accommodating groove concavely formed on the ring body 10 from the proximal end annular surface 10a of the ring body 10 and a second sub-accommodating groove concavely formed on the ring body 10, and the first sub-accommodating groove and the second sub-accommodating groove penetrate through the other peripheral wall of the ring body 10. It is also noted that the peripheral wall through which the first sub-accommodation groove and the second sub-accommodation groove penetrate is the other peripheral wall opposite to the peripheral wall provided with the partial first accommodation groove 21, that is, when the partial first accommodation groove 21 is provided on the first peripheral wall, the first sub-accommodation groove and the second sub-accommodation groove penetrate both the second peripheral wall; when the partial first accommodation groove 21 is provided on the second peripheral wall, both the first and second sub-accommodation grooves penetrate the first peripheral wall. Namely, the partial first accommodation groove 21 is opposed to the first and second sub-accommodation grooves in the thickness direction of the ring body 10. The two extending ends of the traction wire 200 placed in the partial first accommodating groove 21 are led out from the first sub accommodating groove and the second sub accommodating groove respectively after being hooked on the hooking part.
Preferably, in other embodiments, as shown in fig. 3, 4 and 6, when the first sub-channel 31a and the second sub-channel 31b are respectively a first sub-receiving groove and a second sub-receiving groove concavely formed on the ring body 10 from the proximal end surface 10a of the ring body 10, the first sub-receiving groove and the second sub-receiving groove are respectively a first arc-shaped groove and a second arc-shaped groove penetrating through the other peripheral wall of the ring body 10, as shown in fig. 3, 4 and 6, and the first arc-shaped groove and the second arc-shaped groove overlap with the first receiving groove in the axial direction to form a first perforation a and a second perforation b through which the traction wire 200 can pass. In the embodiment, the arc-shaped grooves are formed in the annular ring body 10, so that on one hand, the columnar traction wires 200 can be placed in the ring body 10 as much as possible, and the thin-wall arrangement is facilitated; on the other hand, the problem that the strength of the ring body 10 is affected by the fact that the part of the ring body 10 becomes too thin due to the arrangement of the non-arc-shaped grooves is avoided. That is, the setting mode of this embodiment can accomplish the thin wall setting, can effectively guarantee the reliability of bulk strength and connection simultaneously.
Referring to fig. 6 and 7, the first and second arc grooves and the first and second receiving grooves are axially overlapped to form first and second perforated holes a and b having an axial length W2 and a circumferential overlapped length W1, and it is understood that the perforated holes may be penetrated by the drawing wire 200, and that the minimum value of the axial length W2 and the circumferential length W1 may be equal to or slightly greater than the diameter of the drawing wire 200, so that the drawing wire may be penetrated by the first and second perforated holes a and b.
As shown in fig. 3 and 4, the local first accommodating groove 21 is formed on the outer peripheral wall of the ring body 10 to form a local outer first accommodating groove, the first sub accommodating groove and the second sub accommodating groove are inner grooves penetrating through the inner peripheral wall of the ring body 10, the arc-shaped grooves are arc-shaped inner grooves, the two arc-shaped inner grooves respectively form a first perforation a and a second perforation b with the local outer first accommodating groove, the protruding block 41 is located in the local outer first accommodating groove, the two arc-shaped inner grooves are located at two sides of the protruding block 41, and the formed first perforation a and second perforation b are also located at two sides of the protruding block 41, so that a W-shaped groove is formed in the local outer first accommodating groove. Referring to fig. 8, the traction wire 200 disposed in the W-shaped groove is hooked on the rear extension end of the hooking portion along the path S1, passes through the perforation along the path S2, and then continues to enter the receiving channel along the path S3. The traction wire has a radial transition along the path S2 through the perforation, which allows the wall thickness of the ring body 10 to be made smaller. Compared with the prior art, on the premise that the sheath tube has the same outer diameter, the invention can realize larger inner diameter of the sheath tube and convey larger-specification instruments; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels. By adopting the scheme of the embodiment, the diameter of the traction wire is equal to the thickness of the traction ring.
In this embodiment, a local first receiving groove 21, a receiving channel and a protruding block 41 form a set of traction structures, and in order to achieve bending adjustment in different directions, in other embodiments, multiple sets of traction structures are arranged at intervals along the circumferential direction of the ring body 10. Wherein, the multiple groups here refer to two groups and more than two groups. The traction structures are illustratively provided in two groups, the two groups of traction structures being diametrically opposed, thereby enabling bi-directional bending adjustment.
Further, since the traction ring is usually fixed to the distal end of the sheath, in order to enhance the connection strength between the traction ring and the distal end of the sheath, the circumferential rotation of the annular traction ring relative to the sheath is avoided, and as shown in fig. 3, the outer circumferential wall of the traction ring is further provided with a concave connection groove 50, and the connection groove 50 axially penetrates through the proximal annular surface 10a and the distal annular surface 10b of the ring body 10. Preferably, the coupling grooves 50 are provided in plurality at intervals along the circumferential direction of the ring body 10.
It should be noted that the embodiment of the traction ring 100 in embodiment 4 is not limited to only one embodiment, and various structures thereof may have many different embodiments, and the selection and combination of the embodiments may be set according to the actual implementation.
Example 5
Referring to fig. 9, in addition to the traction ring 100 provided in the above embodiment 4, the present invention provides an exemplary sheath tube a, where the sheath tube a includes a tube 300, the traction ring 100 and the traction wire 200 as described in embodiment 4 provided on the tube 300, and a traction channel communicating with the receiving channel of the traction ring 100 is provided in the tube 300, and the traction wire 200 passing through the receiving channel enters the receiving channel. The traction ring 100 described in embodiment 4 is selected so that the invention can achieve larger inner diameter of the sheath and deliver larger specification instruments on the premise of the same outer diameter of the sheath; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels.
Example 6
On the basis of the traction ring 100 provided in the above embodiment 4 and the sheath tube a provided in the embodiment 5, the present invention provides an interventional device, which includes the sheath tube a described in the embodiment 5, a handle connected to the proximal end of the sheath tube a, and a bending mechanism disposed in the handle, wherein the traction wire 200 entering the accommodating channel passes through the traction channel and then is connected to the bending mechanism, and the bending mechanism moves under the driving of an external force to draw and release the traction wire 200, so as to realize the bending of the sheath tube.
Example 7
This embodiment proposes another specific implementation of the traction ring 100 based on the traction ring 100 provided in embodiment 1. Specifically, referring to fig. 10, the first receiving groove of the present embodiment is circumferentially provided on the outer peripheral wall of the ring body 10 such that the formed first receiving groove is an annular groove 22, and an annular wall 42 of the annular groove 22 forms a hooking portion. That is, the hooking portion is formed by the ring body 10 itself, and the receiving channel concavely provided on the proximal end surface 10a of the ring body 10 communicates with the annular groove 22, where the communication means direct communication or indirect communication. The traction wire 20 is hung on the hanging part after winding the annular groove 22 of the ring body 10 for a circle, and then passes through the accommodating channel. The traction wire surrounds the annular groove 22 on the outer side of the traction ring for a circle, and stress points are distributed at all points on the periphery of the traction ring when stress is applied, so that the failure risk of the traction wire and the traction ring is reduced, and the traction wire and the traction ring are connected more reliably.
With continued reference to fig. 3, in order to better adapt to the compliant form of the traction wire 200 and attach to the same, the stress area is enlarged, and the surface, which contacts with the traction wire 200, of the junction of the first accommodating groove and the accommodating channel is an arc surface, i.e. the 90-degree bending position of the traction wire is subjected to arc surface treatment. The contact mode of the opposite edges and corners can effectively reduce abrasion of the arc-shaped contact surface, reduce failure risk of the traction wire and the fixed ring, and enable the connection of the traction wire and the fixed ring to be more reliable.
As an implementation of the accommodating channel in this embodiment, the accommodating channel is a through hole concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10, and the through hole is communicated with the annular groove 22, where the communication refers to direct communication or indirect communication, and the traction wire 200 placed in the annular groove 22 is hooked on the ring body 10 and then passes through the through hole. Note that the through hole formed in the ring body 10 herein means that the through hole does not penetrate any peripheral wall of the ring body 10.
As another implementation of the accommodating channel in this embodiment, the accommodating channel is a second accommodating groove concavely formed on the ring body 10 from the proximal end surface 10a of the ring body 10, and the second accommodating groove penetrates through the inner peripheral wall of the ring body 10. The mode that the second accommodation groove penetrates through the inner peripheral wall of the ring body 10 is more beneficial to the arrangement of the accommodation channel, the manufacturing process is simpler and easier to realize, the requirement on the wall thickness of the ring body 10 is lower, and the arrangement of the thin wall is more beneficial.
Further, as shown in fig. 10 and 12, the accommodating channel includes a first sub-channel 31a and a second sub-channel 31b that are circumferentially spaced apart, the first sub-channel 31a and the second sub-channel 31b are both in communication with the annular groove 22, where the communication means direct communication or indirect communication, after the traction wire 200 disposed in the annular groove 22 is hooked on the ring body 10, two extension ends of the traction wire 200 respectively pass through the first sub-channel 31a and the second sub-channel 31b, and two extension sections of the traction wire 200 are respectively independent, so that the problem of product failure caused by mutual winding and abrasion of the traction wires 200 passing through one accommodating channel is avoided.
Wherein, based on the arrangement of the receiving channels in the present embodiment, when the receiving channels are through holes concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10, the first sub-channels 31a and the second sub-channels 31b may be first through holes concavely formed in the ring body 10 from the proximal end surface 10a of the ring body 10 and second through holes, which are both in communication with the annular groove 22, where communication means direct communication or indirect communication. Then, after the traction wire 200 placed in the local first receiving groove is hooked on the ring body 10, two extending ends of the traction wire respectively pass through the first through hole and the second through hole.
When the accommodating channel is a second accommodating groove concavely formed on the ring body 10 from the proximal end annular surface 10a of the ring body 10, the first sub-channel 31a and the second sub-channel 31b are a first sub-accommodating groove concavely formed on the ring body 10 from the proximal end annular surface 10a of the ring body 10 and a second sub-accommodating groove concavely formed on the ring body 10, respectively, and the first sub-accommodating groove and the second sub-accommodating groove penetrate through the inner peripheral wall of the ring body 10. I.e. the annular recess 22 is opposite the first and second sub-receiving grooves in the thickness direction of the ring body 10. The two extending ends of the traction wire 200 placed in the annular groove 22 are led out from the first sub-accommodating groove and the second sub-accommodating groove respectively after being hooked on the ring body 10.
Further, since the traction ring is usually fixed to the distal end of the sheath, in order to enhance the connection strength between the traction ring and the distal end of the sheath, the circumferential rotation of the annular traction ring relative to the sheath is avoided, and a connecting groove (not shown) is further concavely formed in the outer circumferential wall of the traction ring, and penetrates through the proximal annular surface 10a and the distal annular surface 10b of the ring body 10 in the axial direction. Preferably, the coupling grooves are provided in plurality at intervals along the circumferential direction of the ring body 10.
It should be noted that the embodiment of the traction ring 100 in embodiment 7 is not limited to only one embodiment, and various structures thereof may have many different embodiments, and the selection and combination of the embodiments may be set according to the actual implementation.
Example 8
Referring to fig. 12, in addition to the traction ring 100 provided in the above embodiment 7, the present invention provides an exemplary sheath tube a, where the sheath tube a includes a tube body 300, the traction ring 100 and the traction wire 200 as described in embodiment 7 provided on the tube body 300, and a traction channel communicating with the receiving channel of the traction ring 100 is provided in the tube body 300, and the traction wire 200 passing through the receiving channel enters the receiving channel. The traction ring 100 of embodiment 7 is selected so that the invention can achieve larger inner diameter of the sheath and deliver larger specification of the instrument on the premise of the same outer diameter of the sheath; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels.
Example 9
On the basis of the traction ring 100 provided in the above embodiment 7 and the sheath tube a provided in the embodiment 8, the present invention provides an interventional device, which includes the sheath tube a described in the embodiment 8, a handle connected to the proximal end of the sheath tube a, and a bending mechanism disposed in the handle, wherein the traction wire 200 entering the accommodating channel passes through the traction channel and then is connected to the bending mechanism, and the bending mechanism moves under the driving of an external force to draw and release the traction wire 200, so as to realize the bending of the sheath tube.
In the traction ring, the sheath tube and the interventional instrument, the traction wire is hooked on the hooking part and then is in surface contact with the hooking part, so that the reliability is ensured; meanwhile, the traction wire is led out from the accommodating channel on the ring body after being arranged in the first accommodating groove, so that at least part of the traction wire is accommodated in the ring body, the thickness of the whole structure is effectively reduced, and the thin-wall design is realized. On the premise that the sheath tube has the same outer diameter, the invention can realize larger inner diameter of the sheath tube and convey larger-specification instruments; or on the premise that the sheath tube has the same inner diameter, the invention can realize smaller outer diameter of the sheath tube, and the sheath tube can be used in smaller blood vessels.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (14)
1. The traction ring is used for being connected with a traction wire and is characterized by comprising a ring body, wherein the ring body is provided with a proximal ring surface, a distal ring surface and a peripheral wall, the peripheral wall is positioned between the proximal ring surface and the distal ring surface, a first accommodating groove is concavely formed in one peripheral wall of the ring body, an accommodating channel communicated with the first accommodating groove is concavely formed in the proximal ring surface of the ring body, a hooking part for hooking the traction wire is formed in the first accommodating groove, and the traction wire placed in the first accommodating groove penetrates through the accommodating channel after being hooked on the hooking part.
2. The traction ring of claim 1, wherein the receiving channel is a second receiving groove penetrating through another peripheral wall of the ring body, and a through hole is further formed in the ring body, the through hole is used for communicating the first receiving groove and the second receiving groove, and a traction wire placed in the first receiving groove is hooked on the hooking portion and then passes through the through hole and then enters the second receiving groove.
3. The traction ring of claim 2, wherein the first receiving groove and the second receiving groove axially overlap to form the perforations through which a traction wire may pass.
4. The traction ring of claim 2, wherein the second receiving groove is a concavely formed arcuate groove.
5. The traction ring of any one of claims 1-4, wherein the first receiving groove is partially disposed on a peripheral wall of the ring body, and the hooking portion comprises a protrusion formed in the first receiving groove.
6. The traction ring of claim 5, wherein a surface of the protrusion where the traction wire is hooked is curved.
7. The traction ring according to claim 5, wherein a concave portion for limiting the traction wire hung on the convex block is arranged at the top of the convex block, and/or a blocking portion for limiting the traction wire hung on the convex block is formed on the surface of one side, far away from the bottom wall of the first accommodating groove, of the convex block in an extending mode in the axial direction.
8. The traction ring of claim 5, wherein one of the first receiving grooves, one of the receiving channels, and one of the protrusions form a set of traction structures, the traction structures being arranged in a plurality of sets spaced apart along a circumference of the ring body.
9. The traction ring of any one of claims 1-4, wherein the first receiving groove is circumferentially disposed on an outer peripheral wall of the ring body such that the first receiving groove is formed as an annular groove, an annular wall of the annular groove forming the hooking portion.
10. The traction ring of claim 9, wherein a surface at an intersection of the first receiving groove and the receiving channel in contact with the traction wire is cambered.
11. The traction ring of any one of claims 1-4, wherein the receiving channel comprises first and second circumferentially spaced apart sub-channels, each of the first and second sub-channels communicating with the first receiving groove; wherein,,
when the accommodating channel is a second accommodating groove formed through the other peripheral wall of the ring body, the first sub-channel and the second sub-channel are respectively a first sub-accommodating groove and a second sub-accommodating groove communicated with the first accommodating groove; wherein,,
when the first accommodating groove and the second accommodating groove axially overlap to form the perforation through which the traction wire can pass, the first sub accommodating groove and the second sub accommodating groove axially overlap with the first accommodating groove respectively to form a first perforation and a second perforation through which two ends of the traction wire can pass respectively; wherein,,
when the second accommodating groove is an arc-shaped groove formed by concave arrangement, the first sub accommodating groove and the second sub accommodating groove are a first arc-shaped groove and a second arc-shaped groove formed by concave arrangement respectively.
12. The traction ring of claim 11, wherein when the hooking portion comprises a protrusion formed in the first receiving groove, the protrusion is interposed between the first sub-channel and the second sub-channel.
13. A sheath tube, comprising a tube body, a traction ring according to any one of claims 1 to 12 and a traction wire, wherein the traction ring is arranged on the tube body, a traction channel communicated with a containing channel of the traction ring is arranged in the tube body, and the traction wire passing through the containing channel enters the containing channel.
14. An interventional instrument, comprising the sheath of claim 13, a handle connected to the proximal end of the sheath, and a bending mechanism disposed in the handle, wherein a traction wire entering the receiving channel passes through the traction channel and then is connected with the bending mechanism.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111520318.9A CN116262052A (en) | 2021-12-13 | 2021-12-13 | Traction ring, sheath tube and interventional instrument |
| PCT/CN2022/137435 WO2023109629A1 (en) | 2021-12-13 | 2022-12-08 | Traction ring, sheath, and interventional instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111520318.9A CN116262052A (en) | 2021-12-13 | 2021-12-13 | Traction ring, sheath tube and interventional instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116262052A true CN116262052A (en) | 2023-06-16 |
Family
ID=86721951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111520318.9A Pending CN116262052A (en) | 2021-12-13 | 2021-12-13 | Traction ring, sheath tube and interventional instrument |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116262052A (en) |
| WO (1) | WO2023109629A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117442846A (en) * | 2023-12-22 | 2024-01-26 | 苏州汇禾医疗科技有限公司 | Stay wire ring |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6267746B1 (en) * | 1999-03-22 | 2001-07-31 | Biosense Webster, Inc. | Multi-directional steerable catheters and control handles |
| CN103706017B (en) * | 2013-12-27 | 2016-08-17 | 先健科技(深圳)有限公司 | adjustable bending sheath tube |
| CN208598962U (en) * | 2018-04-02 | 2019-03-15 | 袁渭清 | The guiding catheter of fallopian tube interventional therapy |
| CN110215593A (en) * | 2019-07-20 | 2019-09-10 | 康沣生物科技(上海)有限公司 | A kind of anchorage shoe of adjustable bending sheath tube |
| CN112971870B (en) * | 2019-12-17 | 2023-05-02 | 先健科技(深圳)有限公司 | Adjustable bent sheath tube |
| CN214181408U (en) * | 2020-09-10 | 2021-09-14 | 杭州德柯医疗科技有限公司 | Adjustable curved interventional instrument |
| CN112245760B (en) * | 2020-09-10 | 2022-09-13 | 杭州德柯医疗科技有限公司 | Interventional catheter and production process thereof |
| CN112316277A (en) * | 2020-10-30 | 2021-02-05 | 广东脉搏医疗科技有限公司 | Distal end adjustable bent sheath tube |
| CN112244961B (en) * | 2020-11-09 | 2024-06-07 | 北京华脉泰科医疗器械股份有限公司 | Sheath tube adjusting mechanism and adjustable bent sheath tube |
| CN214805055U (en) * | 2021-01-14 | 2021-11-23 | 深圳市蓝藤科技有限公司 | Body cavity adjusting device |
-
2021
- 2021-12-13 CN CN202111520318.9A patent/CN116262052A/en active Pending
-
2022
- 2022-12-08 WO PCT/CN2022/137435 patent/WO2023109629A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117442846A (en) * | 2023-12-22 | 2024-01-26 | 苏州汇禾医疗科技有限公司 | Stay wire ring |
| CN117442846B (en) * | 2023-12-22 | 2024-03-15 | 苏州汇禾医疗科技有限公司 | Stay wire ring |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023109629A1 (en) | 2023-06-22 |
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