Sheath assembly
By designing a sheath assembly with a snap-off part and an adapter, the inconvenience and adaptation of surgical instruments and sheath sleeves are solved, and a variety of convenient adaptations and efficient operation are achieved.
Patent Information
- Application Number
- CN202421546631.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In medical scenarios, the disassembly and assembly of surgical instruments and sheath sleeves is not convenient enough, and the same sheath sleeve is difficult to meet the needs of different surgical instruments.
A sheath sleeve assembly is designed, including a sheath sleeve and a sheath sleeve tail tube connected to the proximal end of the sheath sleeve. The sheath sleeve tail tube is equipped with a snap-off part, which is clamped with the connecting part of the surgical instrument through the snap-off part, and is fixed and disassembled, and is adapted to the interfaces of different manufacturers by setting up adapters.
It realizes convenient disassembly and assembly of surgical instruments and multiple adaptations, simplifies the operation process, is suitable for surgical instruments of multiple sizes and types, and achieves sealing effect and reverse pretension through sealing rings.
Smart Images
Figure CN222955459U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a sheath assembly that can be easily disassembled and assembled with a surgical instrument. Background Art
[0002] In a medical scenario, it is usually necessary to insert a sheath into the human body, and then connect a surgical instrument such as a resectoscope or a laser endoscope to the proximal end of the sheath, so that the actuator of the surgical instrument extends into a predetermined position through the sheath.
[0003] However, in the actual operation process, there is a problem that it is inconvenient to disassemble and assemble between the front end of the surgical instrument and the proximal end of the sheath, which increases the trouble of manual operation. And the same sheath also has the use requirements of adapting to different surgical instruments. Summary of the Invention
[0004] The purpose of the present application is to provide a sheath assembly that is both convenient for disassembly and assembly and can adapt to a variety of surgical instruments. To achieve the above purpose, one solution of the present application is a sheath assembly, which includes a sheath and a sheath tail tube connected to the proximal end of the sheath. The side of the sheath tail tube away from the sheath is used to connect a surgical instrument; a snap-off part is connected to the sheath tail tube. When the surgical instrument is connected to the sheath tail tube, the snap-off part is snap-connected to the instrument connection part, so as to fix the surgical instrument; when the snap-off part is disengaged from the instrument connection part, the surgical instrument is disconnected from the sheath tail tube.
[0005] In a preferred manner, the snap-off part has a snap groove, and when the surgical instrument is connected to the sheath tail tube, the snap groove is snap-connected to the extension part of the instrument connection part.
[0006] In a preferred manner, an elastic sealing ring is provided on the sheath tail tube; when the snap-off part is snap-connected to the instrument connection part, the sealing ring is squeezed and deformed, and then a force is applied to the surgical instrument in a direction away from the snap-off part through the instrument connection part.
[0007] In a preferred manner, the sheath tail tube has a rotation axis, and the snap-off part has a rotation axis hole; in the assembled state, the rotation axis hole is sleeved on the rotation axis so that the snap-off part is rotatably connected to the sheath tail tube; when the surgical instrument is connected to the sheath tail tube, the snap-off part is buckled towards the direction close to the sheath tail tube, and then is snap-connected to the instrument connection part.
[0008] In a preferred manner, the sheath tail tube is provided with a limiting edge for restricting the rotation of the snap-off part around the rotation axis in a direction away from the sheath tail tube.
[0009] In a preferred manner, the cross-section of the snap-off part is an arc-shaped structure with one side open.
[0010] In a preferred embodiment, the release portion is provided with a wrench extending towards its outer side.
[0011] According to the foregoing technical solution, the wrench, as a part convenient for finger force application, increases the convenience of opening and closing.
[0012] In a preferred embodiment, it further includes an adapter, and the adapter provides the instrument connection portion; in the assembled state, the release portion is connected to the surgical instrument via the instrument connection portion of the adapter.
[0013] According to the foregoing technical solution, by providing an adapter, surgical instruments with different manufacturers' interfaces can be adapted.
[0014] In a preferred embodiment, the sheath and the sheath tail tube are fixedly connected by means of metal part encapsulation or bonding.
[0015] In a preferred embodiment, the sheath tail tube is made of plastic material.
[0016] According to the foregoing technical solution, through the opening and closing of the release portion, the structure is simple, compact and easy to operate, and the installation, fastening and disassembly of various surgical instruments can be conveniently achieved. It can be applicable to surgical instruments of multiple sizes and types. The sealing ring can not only achieve the sealing effect, but also apply a reverse pre-tightening force to the surgical instrument. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to illustrate the present application more clearly, the accompanying drawings of the specification of the present application will be described and explained below. Obviously, the accompanying drawings in the following description only illustrate certain aspects of some exemplary embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 is a schematic structural diagram of an exemplary sheath assembly.
[0019] Figure 2 is a schematic structural diagram of an exemplary sheath tail tube.
[0020] Figure 3 is a schematic structural diagram of an exemplary release portion.
[0021] Figure 4 is a schematic cross-sectional structural diagram of an exemplary sheath assembly.
[0022] Figure 5 is a schematic assembly diagram of an exemplary sheath assembly and a surgical instrument.
[0023] Figure 6 is a schematic assembly diagram of an exemplary sheath assembly connected to a surgical instrument through an adapter.
[0024] Description of the Attached Drawings
[0025] 1 Sheath Tail Tube
[0026] 11 Rotating Shaft
[0027] 12 Limit Stop
[0028] 2 Locking and Releasing Part
[0029] 21 Locking Groove
[0030] 22 Wrench
[0031] 23 Rotating Shaft Hole
[0032] 3 Sheath
[0033] 4 Instrument Connection Part
[0034] 41 Extension Part
[0035] 5 Surgical Instrument
[0036] 6 Sealing Ring
[0037] 7 Adapter Detailed Implementation Modes
[0038] The following describes various exemplary embodiments of the present application in detail with reference to the attached drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present application and its application or use. The present application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present application thorough and complete and to fully convey the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments should be construed as merely exemplary and not as limitations.
[0039] The use of words such as "including" or "comprising" in the present application means that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.
[0040] All terms used in the present application (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present application belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary should be construed as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense, unless expressly defined as such herein.
[0041] For components not described in detail in this part, specific model parameters of components, the interrelationships between components, and control circuits, they can be considered as technologies, methods, and devices known to those of ordinary skill in the relevant art. However, in appropriate cases, such technologies, methods, and devices should be regarded as part of the specification.
[0042] The following refers to Figure 1-6 to illustrate the composition of the sheath assembly of the present application. Figure 1 is a schematic structural diagram of the sheath assembly, Figure 2 is a schematic structural diagram of the sheath tail tube 1, Figure 3 is a schematic structural diagram of the detachable part 2, Figure 4 is a schematic cross-sectional structural diagram of the sheath assembly, Figure 5 is an assembly schematic diagram of the sheath assembly and the surgical instrument 5, Figure 6 is an assembly schematic diagram of the sheath assembly connecting the surgical instrument through the adapter 7.
[0043] The sheath assembly of this embodiment includes a sheath 3 and a sheath tail tube 1 connected to the proximal end of the sheath 3. The side of the sheath tail tube 1 away from the sheath 3 includes a detachable part 2 and an instrument connecting part 4 for connecting the surgical instrument 5.
[0044] For the sake of convenience of description, here Figure 1 the extending direction of the sheath 3 shown is taken as the axial direction, the distal direction of the sheath 3 for inserting into the body to be examined is the front, the proximal direction is the rear, and the direction perpendicular to the axial direction is the transverse or radial direction.
[0045] In a common example, the material of the sheath 3 is a stainless steel thin-walled tube, and the cross-sectional shape is preferably oblong, which can accommodate the insertion of the surgical instrument while reducing the overall outer perimeter. The sheath tail tube 1 and the detachable part 2 are preferably made of plastic. The proximal end of the sheath 3 is fixedly connected to the plastic sheath tail tube 1 in the form of metal part overmolding or bonding, and there is no gap between them.
[0046] The surgical instrument 5 can be various instrument devices for medical purposes such as a resectoscope, a laser endoscope, etc., which are not specifically limited here. The surgical instrument 5 includes an instrument connecting part 4 that can be connected to the sheath tail tube 1. During the surgical process, the surgical instrument 5 is connected to the sheath tail tube 1 via the instrument connecting part 4, and then its actuator can extend into the body to be examined through the lumen of the sheath 3 to perform corresponding operations.
[0047] As Figure 1 shown, in this embodiment, the sheath tail tube 1 is connected with a detachable part 2, and the detachable part 2 is configured in the form of a hook, which can be opened and closed at a certain angle to provide installation and fixation for the instrument connecting part 4 of the surgical instrument 5, facilitating the disassembly and replacement of the surgical instrument 5. As Figure 5As shown, when the surgical instrument 5 is connected to the sheath tail tube 1, the latching portion 2 is latched with the instrument connecting portion 4 of the surgical instrument 5, thereby completing the fixation of the surgical instrument 5; when the latching portion 2 is disengaged from the instrument connecting portion 4, the surgical instrument 5 is disconnected from the sheath tail tube 1.
[0048] like Figure 1-3 As shown, the sheath tail tube 1 has a rotating shaft 11, and the snap-off portion 2 has a rotating shaft hole 23. In the assembled state, the rotating shaft hole 23 is sleeved on the rotating shaft 11, so that the snap-off portion 2 is rotatably connected to the sheath tail tube 1. When the surgical instrument 5 is connected to the sheath tail tube 1, the snap-off portion 2 is buckled in the direction close to the sheath tail tube 1, and then snap-fitted with the instrument connecting portion 4 of the surgical instrument 5. In this embodiment, the rotating shaft 11 and the rotating shaft hole 23 are respectively distributed on both sides of the radial direction of the sheath tail tube 1 and the snap-off portion 2 to achieve a tighter connection.
[0049] like Figure 2 As shown, as a preferred embodiment, the sheath tail tube 1 is provided with a limiting rib 12 for limiting the rotation of the clipping portion 2 around the rotation axis 11 in a direction away from the sheath tail tube 1. That is, when the clipping portion 2 is opened to a certain angle in a direction away from the sheath tail tube 1, the outer peripheral wall of the rotating shaft hole 23 abuts against the limiting rib 12, so that the clipping portion 2 cannot continue to open to a larger angle.
[0050] like Figure 1 and Figure 3 , Figure 4 As shown, in this embodiment, the snap-on portion 2 has a snap-on groove 21, and the instrument connecting portion 4 of the surgical instrument 5 has an extension portion 41 adapted to the snap-on groove 21. Exemplarily, the extension portion 41 is a convex shaft extending laterally. When the surgical instrument 5 is connected to the sheath tail tube 1, the snap-on groove 21 is snap-on with the extension portion 41 of its instrument connecting portion 4 to fix the surgical instrument 5. Exemplarily, the snap-on grooves 21 are also distributed on both sides of the snap-on portion 2 in the radial direction.
[0051] like Figure 4 As shown, as a preferred method, an elastic sealing ring 6 is provided in the sheath tail tube 1. When the snap-off portion 2 is snapped with the instrument connecting portion 4 of the surgical instrument 5, the sealing ring 6 is squeezed and deformed, which, on the one hand, seals the blood flowing out through the sheath 3, and on the other hand, applies a force to the surgical instrument 5 in a direction away from the snap-off portion 2, i.e., backward, so that the extension portion 41 is snapped more tightly with the snap-on groove 21, thereby increasing the tightness of the connection of the surgical instrument 5 and preventing it from being easily touched and opened. Among them, when the instrument connecting portion 4 is not installed, the sealing ring 6 will protrude a part of the inner wall of the sheath tail tube 1 in the horizontal direction, so that it will be squeezed and deformed when the instrument connecting portion 4 is installed.
[0052] like Figure 3As shown, as a preferred manner, the cross-section of the detachment part 2 is an arc-shaped structure with one side open. The detachment part 2 is also provided with a wrench 22 extending laterally towards its outer side, which facilitates the application of force by the operator's fingers. When it is necessary to make a snap connection, the detachment part 2 is buckled towards the direction close to the sheath tail tube 1 through the wrench 22. When it is necessary to disassemble, the detachment part 2 is opened towards the direction away from the sheath tail tube 1, which increases the convenience of operation. One wrench 22 can also be provided on each of the two outer sides in the transverse direction of the detachment part 2, and its area should not be too large to avoid being accidentally touched and causing the detachment part 2 to open.
[0053] It should be noted that the surgical instrument 5 in the foregoing embodiment needs to include an instrument connection part 4 that matches the sheath tail tube 1 and the detachment part 2 of the present application. Among them, the instrument connection part 4 has a size that matches the sheath tail tube 1 and an extension part 41 that matches the snap groove 21 on the detachment part 2. In an alternative embodiment, as Figure 6 shown, a adapter 7 including the instrument connection part 4 is provided to adapt various conventional surgical instruments with different manufacturer interfaces. The front end of the adapter 7 is provided with an instrument connection part 4, and the rear end is provided with an installation and fixing structure suitable for different manufacturer interfaces.
[0054] In the assembled state, the installation and fixing structure at the rear end of the adapter 7 is tightly connected to the front end of a specific surgical instrument. Thus, after the detachment part 2 catches the instrument connection part 4 of the adapter 7, the surgical instrument 5 is fixed via the adapter 7. The actuator of the surgical instrument 5 can enter the sheath 3 through the adapter 7 and the sheath tail tube 1 and finally enter the object to be examined.
[0055] Exemplarily, the adapter 7 and the surgical instrument 5 can be respectively connected via threads, and the specific connection method is not limited.
[0056] In summary, the sheath assembly of the present application has a compact and simple structure. By setting the sheath tail tube 1 and the openable and closable detachment part 2, the fixation of the surgical instrument 5 is realized through the buckling between the detachment part 2 and the instrument connection part 4. It is very convenient to install and disassemble the surgical instrument on the sheath assembly. And by setting the adapter 7, it can adapt to a variety of surgical instruments 5 with different models, sizes and types, increasing the scope of application and being better applicable to the situation where multiple surgical instruments need to be switched to complete the operation.
[0057] It should be understood that the above specific embodiments are only used to explain the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes changes, replacements, and combinations, and should be covered within the protection scope of the present application.
Claims
1. A sheath assembly, characterized in that: It comprises a sheath and a sheath tail tube connected to the proximal end of the sheath, wherein the side of the sheath tail tube away from the sheath is used for connecting a surgical instrument; The sheath tail tube is connected with a snap-off portion, and when the surgical instrument is connected to the sheath tail tube, the snap-off portion is snapped with the instrument connecting portion, thereby fixing the surgical instrument; When the latching portion is disengaged from the instrument connecting portion, the surgical instrument is disconnected from the sheath tail tube.
2. The sheath assembly according to claim 1, characterized in that: The snap-off portion has a snap-on groove, and when the surgical instrument is connected to the sheath tail tube, the snap-on groove is snap-connected with the extension portion of the instrument connecting portion.
3. The sheath assembly according to claim 2, characterized in that: The sheath tail tube is provided with an elastic sealing ring; When the snap-off portion is snapped into engagement with the instrument connecting portion, the sealing ring is squeezed and deformed, and then a force is applied to the surgical instrument via the instrument connecting portion in a direction away from the snap-off portion.
4. The sheath assembly according to any one of claims 1 to 3, characterized in that: The sheath tail tube has a rotating shaft, and the clip-off portion has a rotating shaft hole; In the assembled state, the rotating shaft hole is sleeved on the rotating shaft so that the snap-off portion is rotatably connected to the sheath tail tube; When the surgical instrument is connected to the sheath tail tube, the snap-off portion is snapped toward the direction close to the sheath tail tube, and then snap-connected with the instrument connecting portion.
5. The sheath assembly according to claim 4, characterized in that: The sheath tail tube is provided with a limiting rib for limiting the rotation of the clip-off portion around the rotation axis in a direction away from the sheath tail tube.
6. The sheath assembly according to claim 4, characterized in that: The cross section of the snap-off portion is an arc-shaped structure with one side open.
7. The sheath assembly according to claim 4, characterized in that: The snap-off portion is provided with a wrench extending toward the outside thereof.
8. The sheath assembly according to any one of claims 1 to 3, characterized in that: Also included is an adapter, the adapter providing the device connection portion; In the assembled state, the latching portion is connected to the surgical instrument via the instrument connecting portion of the adapter.
9. The sheath assembly according to any one of claims 1 to 3, characterized in that: The sheath and the sheath tail tube are fixedly connected by means of metal parts being coated with glue or bonded.
10. The sheath assembly according to claim 7, characterized in that: The sheath tail tube is made of plastic.