CN114159672A - Adjustable curved sheath and adjustable curved sheath assembly - Google Patents
Adjustable curved sheath and adjustable curved sheath assembly Download PDFInfo
- Publication number
- CN114159672A CN114159672A CN202111364267.5A CN202111364267A CN114159672A CN 114159672 A CN114159672 A CN 114159672A CN 202111364267 A CN202111364267 A CN 202111364267A CN 114159672 A CN114159672 A CN 114159672A
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- Prior art keywords
- anchoring
- sheath
- head
- adjustable
- ring
- 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
Links
- 238000004873 anchoring Methods 0.000 claims abstract description 150
- 238000005452 bending Methods 0.000 claims description 24
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Images
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
- A61M25/0147—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 application provides a sheath and the sheath subassembly that can bend adjustably, the sheath that can bend adjustably includes: body and draw gear, draw gear includes: the anchoring ring is arranged at the front end of the pipe body and is coaxial with the main body of the pipe body, and an anchoring clamping groove is formed in the side wall of the anchoring ring; a pull wire, comprising: an anchoring head formed at a front end of the traction wire; the main body is connected with the anchoring head and extends along the axial direction of the pipe body; the anchor head is in the perpendicular to the maximum width L of main part extending direction's cross section is greater than the maximum width M of haulage wire, the anchor head with the cooperation of anchor draw-in groove is in order to inlay establish in the anchor ring and with anchor ring fixed connection, and do not surpass the outer wall face and the internal face of anchor ring, the connection of the anchor ring of the sheath of can turning about and haulage wire is more firm, and repeatability is high and difficult for the rupture.
Description
Technical Field
The embodiment of the application relates to the technical field of medical equipment, in particular to an adjustable bending sheath assembly.
Background
The bending adjusting sheath is a sheath tube component applied to interventional and minimally invasive treatment operation processes, and the sheath tube can realize the function of bending the distal end of the sheath tube within a certain angle range through the operation of a proximal handle. After the distal end of the sheath tube is bent, the tip of the sheath tube can point to a target position, so that the surgical operation of a bent path in the surgery is facilitated. The adjustable bending sheath tube in the related art has large traction wire tension in the bending adjusting process, and the connection part of the anchoring ring and the traction wire is easy to break to cause bending adjusting failure.
Disclosure of Invention
In view of the above, the present application provides an adjustable curved sheath to overcome or at least partially solve the above problems.
According to the embodiment of the invention, the adjustable bending sheath comprises: body and draw gear, draw gear includes: the anchoring ring is arranged at the front end of the pipe body and is coaxial with the main body of the pipe body, and an anchoring clamping groove is formed in the side wall of the anchoring ring; a pull wire, comprising: an anchoring head formed at a front end of the traction wire; the main body is connected with the anchoring head and extends along the axial direction of the pipe body; the anchor head the maximum width L of the cross section of the anchor head in the direction perpendicular to the extending direction of the traction wire is larger than the maximum width M of the traction wire, the anchor head is matched with the anchor clamping groove to be embedded in the anchor ring and fixedly connected with the anchor ring, and the anchor head does not exceed the outer wall surface and the inner wall surface of the anchor ring.
According to some embodiments of the invention, the anchoring head comprises a main shaft portion and a protrusion portion connected with the main shaft portion, the main shaft portion is arranged coaxially with the main body of the traction wire, and the anchoring groove is matched with the shape of the anchoring head.
According to some embodiments of the invention, the anchoring head is formed in an inverted L-shape and the anchoring groove is formed in an inverted L-shape to be in mating connection with the anchoring head
According to some embodiments of the invention, the anchoring head is formed in a T-shape and the anchoring slot is formed as a T-slot cooperating with the anchoring head.
According to some embodiments of the invention, the anchoring head is formed in a "dry" shape.
According to some embodiments of the invention, the pull wire is formed as a flat wire and the anchoring head is formed using a wire cutting process.
According to some embodiments of the invention, the anchor head is formed in an oblate shape.
According to some embodiments of the invention, the sidewall of the anchoring ring is formed with a stress hole penetrating in a thickness direction of the anchoring ring.
According to some embodiments of the invention, the traction wire is embedded in a wall of the tube and extends in an axial direction of the tube.
The invention also provides an adjustable bending sheath assembly.
An adjustable curved sheath assembly according to an embodiment of the present invention includes: the adjustable bending sheath of any of the above embodiments; and the handle is connected with the traction wire, and pulling force is applied to the traction wire through the handle, so that the front end of the adjustable bent sheath is bent.
According to the technical scheme, the adjustable bending sheath assembly and the adjustable bending sheath of the embodiment of the application have the advantages that the front end of the traction wire is provided with the anchoring head, the side wall of the anchoring ring is provided with the anchoring clamping groove, the front end of the traction wire can be fixedly connected with the anchoring ring through the clamping connection of the anchoring clamping groove and the anchoring head, compared with the prior art that the traction wire is fixed outside the anchoring ring, the front end of the traction wire is embedded in the anchoring ring in the application, on one hand, the size (such as the diameter) of the anchoring ring can be reduced, the non-adjustable bending length of the front end of the adjustable bending sheath is reduced, the effective bending length is improved, on the other hand, the stress areas of the anchoring ring and the traction wire are increased, and the fixing strength of the anchoring ring and the traction wire is enhanced, and then the connecting firmness of the anchoring ring and the traction wire is enhanced, the repeatability of the adjustable bent sheath is improved, the bending radius can be effectively reduced, and the efficiency of the conveying system reaching the target position is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural view of an adjustable curved sheath assembly of the present application;
FIG. 2 is a schematic structural view of a retractor of an adjustable curved sheath according to an embodiment of the present application;
FIG. 3 is an exploded view of a retractor of an adjustable curved sheath according to one embodiment of the present application;
FIG. 4 is a schematic structural view of a pulling device of an adjustable curved sheath according to another embodiment of the present application;
FIG. 5 is an exploded view of a retractor of an adjustable curved sheath according to another embodiment of the present application;
FIG. 6 is a schematic structural view of a retractor of an adjustable sheath according to yet another embodiment of the present application;
FIG. 7 is an exploded view of a retractor of an adjustable curved sheath according to yet another embodiment of the present application;
FIG. 8 is a schematic structural view of a retractor of an adjustable sheath according to yet another embodiment of the present application;
FIG. 9 is an exploded view of a retractor of an adjustable curved sheath according to yet another embodiment of the present application;
fig. 10A and 10B are schematic views of the maximum width of the anchoring head and the maximum width of the traction wire in a cross section perpendicular to the extension direction of the traction wire in the embodiment of the present application.
Element number
1000: an adjustable curved sheath assembly; 100: adjustable curved sheath, 200: a handle;
10: a pipe body;
20: traction device, 21: anchor ring, 211: anchoring groove, 212: stress hole, 22: traction wire, 221: anchor head, 222: main shaft portion, 223: projection, 224: a main body, L: maximum width of the anchoring head in a cross section perpendicular to the extension direction of the traction wire, M: the maximum width of the pull wire.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.
Referring to the drawings, an adjustable curved sheath assembly 1000 according to an embodiment of the present invention will be described, where the adjustable curved sheath assembly 1000 is applicable to interventional and minimally invasive treatment operations, and as shown in fig. 1, the adjustable curved sheath assembly 1000 according to an embodiment of the present invention may include an adjustable curved sheath 100 and a handle 200, the handle 200 is connected to a rear end of the adjustable curved sheath 100 for manipulating the adjustable curved sheath 100, and specifically, a front end of the adjustable curved sheath 100 is capable of being curved within a certain angle range, and during a surgical operation, the handle 200 controls the adjustable curved sheath 100 to be curved, so that a tip of the adjustable curved sheath 100 can be directed to a target position, thereby facilitating a surgical operation of a curved path during the surgical operation.
The following describes the bendable sheath 100 according to an embodiment of the present invention with reference to the drawings.
In one embodiment of the present invention, the adjustable bending sheath 100 includes a tube 10 and a traction device 20, the traction device 20 is disposed in the tube 10 and connected to a handle 200 for controlling a bending operation of a front end of the tube 10, and the traction device 20 includes an anchoring ring 21 and a traction wire 22.
The anchoring ring 21 is arranged at the front end of the pipe body 10 and is coaxial with the main body 224 of the pipe body 10, the traction wire 22 can be embedded in the wall of the pipe body 10 and extends along the axial direction of the pipe body 10, the front end of the traction wire 22 is connected and fixed with the anchoring ring 21, the rear end of the traction wire 22 is connected with the handle 200, the traction wire 22 can be pulled backwards through the operation of the handle 200, and the anchoring ring 21 is pulled and transmitted to the pipe body 10 so as to realize the bending control operation of the pipe body 10. Specifically, the front end of the tube 10 is generally made of a material with a hardness less than that of the main body of the tube 10, and due to the different hardness of the material, when the front end of the tube 10 is subjected to a pulling force, the front end of the tube is bent at a position with a lower hardness, so that the bending control effect is achieved, and the bending effect of the tube 10 is more obvious when the pulling force applied by the pulling wire 22 is larger.
As shown in fig. 2 to 10B, an anchoring groove 211 is formed on a side wall of the anchoring ring 21, the anchoring ring 21 is formed in an annular structure and embedded in a side wall of the front end of the pipe body 10, the anchoring groove 211 is formed on the side wall of the anchoring ring 21, and a rear end of the anchoring groove 211 extends to a rear end surface of the anchoring ring 21. It should be noted that "front" and "rear" herein refer to the front-rear direction as shown in the drawings, the front end refers to an end located in the "front" direction in the drawings, and the rear end refers to an end located in the "rear" direction in the drawings.
As shown in fig. 10A to 10B, the front end of the traction wire 22 is formed with an anchoring head 221, the anchoring head 221 is connected to a main body 224, the main body 224 extends along the axial direction of the tube body 10, and the maximum width L of the anchoring head 221 is larger than the maximum width M of the main body 224 of the traction wire 22 in a cross section perpendicular to the extending direction of the main body 224 of the traction wire 22. The anchoring head 221 is fitted with the anchoring groove 211 to be embedded in the anchoring ring 21 and fixedly connected with the anchoring ring 21. Therefore, the anchoring head 221 is matched with the anchoring clamping groove 211 to clamp the anchoring head 221 at the front end of the traction wire 22 with the anchoring ring 21, and the width (such as L) of the cross section of the anchoring head 221 is larger than the width (such as M) of the cross section of the main body 224, so that the anchoring head 221 cannot be separated from the anchoring clamping groove 211, the fixing strength of the traction wire 22 and the anchoring ring 21 can be enhanced, the stress area of the traction wire 22 and the anchoring ring 21 is increased, the possibility that the joint of the anchoring ring 21 and the traction wire 22 is easily broken is reduced, and the service life of the adjustable bent sheath 100 is prolonged.
Further, for example, the main body 224 of the traction wire 22 may be formed in a cylindrical shape, and the anchoring head 221 is formed at the front end of the traction wire 22, so that the maximum width of the anchoring head 221 is only required to be larger than the diameter of the traction wire 22, for example, the anchoring head 221 may be in an oblate shape or any other suitable shape, so that the front end of the traction wire 22 with the anchoring head 221 can be clamped in the anchoring slot 211, and the main body of the traction wire 22 can extend out from the rear end opening of the anchoring slot 211, so that the front end of the traction wire 22 is embedded in the anchoring ring 21, and the anchoring head 221 does not exceed the inner wall surface and the outer wall surface of the anchoring ring 21, thereby avoiding affecting the connection structure between the anchoring ring 21 and the tube body 10, and causing the diameter of the anchoring ring to be increased due to the fact that the anchoring head 221 exceeds the inner wall surface or the outer wall surface of the anchoring ring 21, and further causing the diameter of the tube body 10 to be increased.
Therefore, according to the adjustable bent sheath 100 provided by the embodiment of the invention, the front end of the traction wire 22 is provided with the anchoring head 221, the side wall of the anchoring ring 21 is provided with the anchoring clamping groove 211, and the front end of the traction wire 22 can be fixedly connected with the anchoring ring 21 through the clamping connection of the anchoring clamping groove 211 and the anchoring head 221.
On the other hand, the stress areas of the anchoring ring 21 and the traction wire 22 are increased, the fixing strength of the anchoring ring 21 and the traction wire 22 is enhanced, the connection firmness of the anchoring ring 21 and the traction wire 22 is further enhanced, the repeatability of the adjustable bent sheath 100 is improved, the bending radius can be effectively reduced, the efficiency of the conveying system reaching a target point position is improved, the probability of bending failure caused by the fact that the connection part of the anchoring ring and the traction wire is easily broken can also be reduced, and the service life is prolonged.
Alternatively, as shown in fig. 2 to 9, the anchoring groove 211 may be formed as a through hole penetrating through the thickness direction of the anchoring ring 21, so that the anchoring groove 211 is formed with a simple process and is convenient to manufacture. The thickness of the anchoring head 221 along the thickness direction of the anchoring ring 21 is less than or equal to the depth of the anchoring slot 211, so that the traction wire 22 does not exceed the inner wall surface and the outer wall surface of the anchoring ring 21.
Further, the sidewall of the anchor ring 21 is formed with stress holes 212 penetrating in the thickness direction of the anchor ring 21, so that the casting stress of the anchor ring 21 can be relieved, and the stress holes 212 can relieve the stress generated when the anchor ring 21 is subjected to a large tensile force.
In some embodiments of the present invention, as shown in fig. 7, the anchoring head 221 includes a main shaft portion 222 and a protrusion 223 formed on an outer wall surface of the main shaft portion 222, the main shaft portion 222 is coaxially disposed with the main body 224 of the traction wire 22, and the anchoring groove 211 is matched with the anchoring head 221 in shape, wherein the main shaft portion 222 may have a size same as that of the main body 224 of the traction wire 22, and the protrusion 223 may extend outward from the outer wall of the main shaft portion 222, such that the width of the anchoring head 221 is greater than that of the main body 224 of the traction wire 22, such that the anchoring head 221 may be fixed with the anchoring ring 21 while being fitted in the anchoring groove 211, without being separated from the rear end opening of the anchoring groove 211, and the contact area and the force-bearing area of the anchoring ring 21 and the traction wire 22 are increased, thereby enhancing the connection firmness of the anchoring ring 21 and the traction wire 22.
In the example shown in fig. 8-9, the anchor head 221 is formed in an inverted L-shape and the anchor slot 211 is formed as an inverted L-shaped slot to mate with the anchor head 221. As for the method of forming the anchoring head 221, the anchoring head 221 may be formed by bending the end of the traction wire 22 or by heat setting.
In the example shown in fig. 4-5, the anchoring head 221 is formed into a T shape, and the anchoring slot 211 is formed into a T-shaped slot matched with the anchoring head 221, wherein the joint of the anchoring head 221 and the anchoring slot 211 is connected by welding, and the thickness of the T-shaped anchoring head 221 does not exceed the depth of the T-shaped slot, so that the traction wire 22 does not exceed the inner wall surface and the outer wall surface of the anchoring ring 21. In the example shown in fig. 6-7, the anchoring head 221 is formed in a "dry" shape, the anchoring slot 211 communicates with the anchoring head 221 in shape to be suitable for being clamped with the anchoring head 221, and the joint of the anchoring head 221 and the anchoring slot 211 is connected by welding, so that the welding area of the anchoring ring 21 and the traction wire 22 can be further increased. Alternatively, the anchoring head 221 may be formed in a shape of "king" as long as the maximum width of the anchoring head 221 can be larger than the maximum width of the main body of the traction wire 22, so that the front end of the traction wire 22 can be fixed to the anchoring groove 211 in a snap-fit manner. For the formation of the T-shape and the "dry" shape of the anchoring head 221, the pulling wire 22 may be a flat wire structure, and the shape of the anchoring head 221 may be cut out by performing a process such as wire cutting on the front end of the pulling wire 22.
In the example shown in fig. 2 to 3, the anchoring head 221 is formed in an oblate shape, and specifically, the traction wire 22 may be formed in a cylindrical shape, by performing an electric discharge treatment on the front end of the cylindrical traction wire 22, or heat-setting to make a bulb shape, and then flattening it to form an oblate shape having a thickness not exceeding the thickness of the side wall of the anchoring ring 21.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. An adjustable bend sheath, comprising: body and draw gear, draw gear includes:
the anchoring ring is arranged at the front end of the pipe body and is coaxial with the pipe body, and an anchoring clamping groove is formed in the side wall of the anchoring ring;
a pull wire, comprising:
an anchoring head formed at a front end of the traction wire; and
the main body is connected with the anchoring head and extends along the axial direction of the pipe body;
the maximum width L of the cross section of the anchoring head in the direction perpendicular to the extending direction of the main body is larger than the maximum width M of the traction wire, the anchoring head is matched with the anchoring clamping groove to be embedded in the anchoring ring and fixedly connected with the anchoring ring, and the maximum width L does not exceed the outer wall surface and the inner wall surface of the anchoring ring.
2. The adjustable curved sheath of claim 1, wherein the anchoring head includes a main shaft portion and a protrusion portion connected to the main shaft portion, the main shaft portion is coaxially disposed with the main body of the traction wire, and the anchoring groove matches the shape of the anchoring head.
3. The adjustable curved sheath of claim 2, wherein the anchoring head is formed in an inverted L-shape and the anchoring slot is formed as an inverted L-shaped slot for mating connection with the anchoring head.
4. The adjustable sheath of claim 2, wherein the anchor head is formed in a T-shape and the anchor socket is formed as a T-shaped slot that mates with the anchor head.
5. The adjustable bend sheath of claim 2, wherein the anchor head is formed in a "dry" shape.
6. The adjustable curved sheath of any one of claims 3-5, wherein the pull wire is formed as a flat wire and the anchoring head is formed using a wire cutting process.
7. The adjustable sheath of claim 1, wherein the anchor head is formed in an oblate shape.
8. The adjustable bend sheath of claim 1, wherein the side wall of the anchoring ring is formed with a stress hole therethrough in a thickness direction of the anchoring ring.
9. The adjustable bend sheath of claim 1, wherein the pull wire is embedded in a wall of the tube and extends in an axial direction of the tube.
10. An adjustable curved sheath assembly, comprising:
the adjustable bending sheath of any one of claims 1-9;
the handle is connected to the rear end of the adjustable bent sheath and connected with the traction wire, and pulling force is applied to the traction wire through the handle, so that the front end of the adjustable bent sheath is bent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111364267.5A CN114159672A (en) | 2021-11-17 | 2021-11-17 | Adjustable curved sheath and adjustable curved sheath assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111364267.5A CN114159672A (en) | 2021-11-17 | 2021-11-17 | Adjustable curved sheath and adjustable curved sheath assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114159672A true CN114159672A (en) | 2022-03-11 |
Family
ID=80479467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111364267.5A Pending CN114159672A (en) | 2021-11-17 | 2021-11-17 | Adjustable curved sheath and adjustable curved sheath assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114159672A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706017A (en) * | 2013-12-27 | 2014-04-09 | 先健科技(深圳)有限公司 | Sheathing tube capable of being adjusted to be bent |
| CN212141125U (en) * | 2019-12-30 | 2020-12-15 | 深圳市先健畅通医疗有限公司 | Adjustable bent sheath tube |
| CN112244961A (en) * | 2020-11-09 | 2021-01-22 | 北京华脉泰科医疗器械有限公司 | Sheath pipe adjusting mechanism and adjustable bent sheath pipe |
| CN212940976U (en) * | 2020-04-17 | 2021-04-13 | 苏州茵络医疗器械有限公司 | Adjustable curved sheath |
-
2021
- 2021-11-17 CN CN202111364267.5A patent/CN114159672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706017A (en) * | 2013-12-27 | 2014-04-09 | 先健科技(深圳)有限公司 | Sheathing tube capable of being adjusted to be bent |
| US20160317784A1 (en) * | 2013-12-27 | 2016-11-03 | Lifetech Scientific (Shenzhen) Co., Ltd. | Adjustable Bent Sheath Tube |
| CN212141125U (en) * | 2019-12-30 | 2020-12-15 | 深圳市先健畅通医疗有限公司 | Adjustable bent sheath tube |
| CN212940976U (en) * | 2020-04-17 | 2021-04-13 | 苏州茵络医疗器械有限公司 | Adjustable curved sheath |
| CN112244961A (en) * | 2020-11-09 | 2021-01-22 | 北京华脉泰科医疗器械有限公司 | Sheath pipe adjusting mechanism and adjustable bent sheath pipe |
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