Flexible ureteroscope guide sheath with adjustable bending angle

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a flexible ureteroscope guide sheath with an adjustable bending angle, which comprises a bendable sheath tube, a channel for a flexible ureteroscope to go in and out is arranged in the sheath tube, a guide sheath joint is arranged at the rear end of the sheath tube, and an adjusting structure for adjusting the bending angle of the sheath tube is arranged on the guide sheath joint. The adjusting structure comprises a first pull wire, a second pull wire and an adjusting rotating block, one end of the first pull wire and one end of the second pull wire are symmetrically connected to the inner wall, close to the front end, of the sheathing canal, and the adjusting rotating block is rotationally connected with the guiding sheath connector. The other ends of the first pull wire and the second pull wire extend into an inner cavity of the guide sheath connector and are connected with the part, extending into the guide sheath connector, of the adjusting rotating block, the bending angle of the sheath tube can be adjusted by rotating the rotating part leftwards and rightwards, the operation direction of the guide sheath is consistent with the specific adjustment direction, operation is visual, and operation is convenient. The probability that the sheathing canal is reversely adjusted can be reduced to a certain extent, so that the operation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a ureteroscope guide sheath with adjustable bending angle. Background Art

[0002] The guide sheath is a commonly used medical device in urology. It is used to establish a surgical channel for surgical instruments without surgery. In ureteroscopic lithotomy, the guide sheath first enters the patient's body and is directly passed near the lesion under imaging to assist the endoscope and other instruments to enter the urinary cavity and provide a continuous operation channel for them. It can protect the ureter when the instrument is repeatedly exchanged, reduce trauma to it, and protect precision instruments from damage.

[0003] Currently, the sheath of the ureteroscope guide sheath is made of flexible material. The front end of the sheath can be passively bent when it hits the soft ureteral wall. However, these flexible ureteroscope guide sheaths are passively bent along with the ureteroscope, and the operator cannot subjectively control the bending angle, so the angle needs to be repeatedly adjusted during the operation. This not only delays the operation time and increases the patient's anesthesia risk, but also affects the operator's experience.

[0004] To alleviate the above problems, in the prior art, a Chinese utility model patent with application number: CN202320165762.1 discloses a guide sheath with adjustable bending angle. The user can control the sheath to bend to the left and right by sliding the adjustment slider provided in the scheme forward and backward to adjust the bending angle. Then, pushing the angle adjustment operation forward and backward is not easy to intuitively reflect the specific bending direction of the sheath, and it is easy to form a reverse adjustment of the angle of the sheath. Therefore, in response to this problem, we propose a ureteroscope guide sheath with adjustable bending angle. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the utility model discloses a ureteroscope guide sheath with adjustable bending angle.

[0006] In order to achieve the above purpose, a technical solution adopted by the utility model is:

[0007] A ureteroscope guide sheath with adjustable bending angle comprises a bendable sheath tube, a passage for the ureteroscope to enter and exit is opened in the sheath tube, a guide sheath joint is connected to the rear end of the sheath tube, an adjustment structure for adjusting the bending angle of the sheath tube is arranged on the guide sheath joint, the adjustment structure comprises a first traction line, a second traction line and an adjustment rotating block, one end of the first traction line and the second traction line are symmetrically connected to the inner wall of the sheath tube near the front end, the adjustment rotating block is rotatably connected to the guide sheath joint, the other end of the first traction line and the second traction line extend to the inner cavity of the guide sheath joint and are connected to the part of the adjustment rotating block extending into the guide sheath joint.

[0008] Furthermore, the first traction line is bonded to the left side of the inner wall of the sheath tube near the front end by means of fixing glue, and the second traction line is symmetrically bonded to the right side of the inner wall of the sheath tube near the front end by means of fixing glue.

[0009] Furthermore, the adjustment rotating block includes a control part, a shaft body and a support rod, the control part is connected to the upper end of the shaft body, the shaft body longitudinally penetrates the side wall of the guide sheath joint and is rotatably connected to the guide sheath joint, the number of the support rods is two, the two support rods are fixed to the lower end of the shaft body, the two shaft bodies are symmetrically distributed on the left and right, the other ends of the first traction line and the second traction line extend to the inner cavity of the guide sheath joint and are respectively fixed to the two support rods.

[0010] Furthermore, the lower end of the shaft body is higher than the upper end of the channel, and the two support rods are inclined to the left and right sides from top to bottom respectively.

[0011] Furthermore, the first traction line and the second traction line are respectively fixed to the two support rods and the first traction line and the second traction line are respectively fixed to the left and right sides of the inner wall of the sheath tube (1) in the same plane.

[0012] Furthermore, the guide sheath joint is provided with a step groove communicating with the inner cavity of the guide sheath joint, a cover plate is bonded in the step groove, an axial hole is provided in the middle of the cover plate, and the shaft body is assembled in the axial hole.

[0013] Furthermore, a slot is provided at the upper end of the shaft body, a plug which is plugged into the slot is fixedly connected to the lower end of the control part, and the plug is bonded into the slot by fixing glue.

[0014] Furthermore, the shaft body and the support rod are an integral structure.

[0015] Furthermore, the cross section of the control portion is arc-shaped on a side close to the shaft body, and is arrow-shaped on a side away from the shaft body.

[0016] Furthermore, the cover plate is provided with an angle scale groove.

[0017] The utility model discloses a ureteroscope guide sheath with adjustable bending angle, which can adjust the bending angle of the sheath tube by rotating the rotating part left and right. The operation direction is consistent with the specific adjustment direction, and the operation is intuitive. It can reduce the probability of the sheath tube being reversely adjusted to a certain extent, so as to improve the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0021] Figure 3 This is a schematic diagram of the structure after the guide sheath joint is hidden in one embodiment of the utility model;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure enlarged at B in the middle;

[0023] Figure 5 This is a schematic structural diagram of an introducer sheath connector in one embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the connection between the adjustment structure and the cover plate in one embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of a control unit in one embodiment of the utility model.

[0026] The meanings of the symbols in the accompanying drawings are:

[0027] Sheath tube 1, channel 2, guide sheath joint 3, step groove 31, cover plate 32, angle scale groove 321, first traction line 41, second traction line 42, adjustment rotating block 43, control part 431, plug 4311, shaft body 432, slot 4321, support rod 433. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Reference Figure 1-Figure 7As shown, a ureteroscope guide sheath with adjustable bending angle in this embodiment includes a flexible sheath tube 1, a channel 2 for the ureteroscope to enter and exit is opened in the sheath tube 1, a guide sheath joint 3 is connected to the rear end of the sheath tube 1, and an adjustment structure for adjusting the bending angle of the sheath tube 1 is installed on the guide sheath joint 3, and the adjustment structure includes a first traction line 41, a second traction line 42 and an adjustment turn block 43.

[0030] In this embodiment, one end of the first traction line 41 and the second traction line 42 are symmetrically connected to the inner wall of the front end of the sheath tube 1. Specifically, the first traction line 41 is bonded to the left side of the inner wall of the front end of the sheath tube 1 by fixing glue, and the second traction line 42 is symmetrically bonded to the right side of the inner wall of the front end of the sheath tube 1 by fixing glue.

[0031] In this embodiment, the adjusting rotating block 43 is rotatably connected to the guide sheath joint 3. The other ends of the first traction line 41 and the second traction line 42 extend to the inner cavity of the guide sheath joint 3 and are connected to the portion of the adjusting rotating block 43 extending into the guide sheath joint 3. Specifically, the adjusting rotating block 43 includes a control part 431, a shaft body 432 and a support rod 433, the control part 431 is connected to the upper end of the shaft body 432, the shaft body 432 longitudinally penetrates the side wall of the guide sheath joint 3 and is rotatably connected to the guide sheath joint 3, the number of the support rod 433 is two, the two support rods 433 are both fixed to the lower end of the shaft body 432, the two shaft bodies 432 are symmetrically distributed, the other ends of the first traction line 41 and the second traction line 42 extend to the inner cavity of the guide sheath joint 3 and are respectively fixed to the two support rods 433.

[0032] In the initial state, the sheath tube 1 will remain upright under the action of its own elastic force. When the user rotates the control part 431 of the adjustment knob 43, the control part 431 will drive the two support rods 433 to rotate through the shaft 432. If the control part 431 is rotated to the right, the two support rods 433 will rotate clockwise around the shaft 432. During this process, the support rod 433 on the right will pull the second traction line 42 backwards, and at the same time, the support rod 433 on the left will push the first traction line 41 forward, so that the front end of the sheath tube 1 is pulled to the right by the second traction line 42 to form a rightward angle adjustment. Similarly, if the control part 431 rotates to the left, the two support rods 433 will rotate counterclockwise around the shaft 432. During this process, the support rod 433 on the left will pull the first traction line 41 backwards, and at the same time, the support rod 433 on the right will push the second traction line 42 forwards, so that the front end of the sheath tube 1 is pulled to the left by the first traction line 41 to form a left angle adjustment. In this way, when the user actively adjusts the bending angle of the sheath tube 1, the user can rotate the direction control part 431 to the corresponding direction according to the direction adjustment required. Since the operating direction of the adjustment operation is consistent with the actual adjustment direction, the user can intuitively perceive the specific adjustment direction, which can reduce the probability of the sheath tube being reversely adjusted to a certain extent, so as to improve the safety of the operation.

[0033] In this embodiment, the lower end of the shaft 432 is higher than the upper end of the channel 2, and the two support rods 433 are inclined to the left and right sides from top to bottom. Such a setting can make way for the insertion of the ureteroscope and avoid interference with the ureteroscope.

[0034] In this embodiment, the first traction line 41 and the second traction line 42 are respectively fixed to the two support rods 433 and the first traction line 41 and the second traction line 42 are respectively fixed to the left and right sides of the inner wall of the sheath tube (1) in the same plane. This design can ensure control accuracy.

[0035] In this embodiment, the specific rotational connection between the adjustment structure and the guide sheath joint 3 is as follows: specifically, the guide sheath joint 3 is provided with a step groove 31 communicating with the inner cavity of the guide sheath joint 3, a cover plate 32 is bonded in the step groove 31, a shaft hole is provided in the middle of the cover plate 32, and the shaft body 432 is assembled in the shaft hole. A slot 4321 is provided at the upper end of the shaft body 432, a plug 4311 plugged in the slot 4321 is fixedly connected at the lower end of the control part 431, and the plug 4311 is bonded in the slot 4321 by fixing glue. In addition, the shaft body 432 and the support rod 433 are an integral structure.

[0036] In this embodiment, the cross section of the control part 431 is arc-shaped on the side close to the shaft 432, and the cross section of the control part 431 is arrow-shaped on the side away from the shaft 432. This shape is convenient for the user to control the rotation. In addition, in this embodiment, the cover plate 32 is provided with an angle scale groove 321, so that when the user rotates the control part 431, the arrow-shaped end of the control part 431 can indicate a specific rotation angle on the angle scale groove 321, so that the user can make precise adjustments.

[0037] In summary, the utility model discloses a ureteroscope guide sheath with adjustable bending angle, which can adjust the bending angle of the sheath tube by rotating the rotating part left and right. The operation direction is consistent with the specific adjustment direction, and the operation is intuitive. It can reduce the probability of the sheath tube being reversely adjusted to a certain extent, thereby improving the safety of the operation.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A ureteroscope guide sheath with adjustable bending angle, comprising a bendable sheath tube, a passage for the ureteroscope to enter and exit is opened in the sheath tube, a guide sheath joint is connected to the rear end of the sheath tube, and an adjustment structure for adjusting the bending angle of the sheath tube is installed on the guide sheath joint, characterized in that: The adjustment structure includes a first traction line, a second traction line and an adjustment rotating block. One end of the first traction line and the second traction line are symmetrically connected to the inner wall of the sheath tube near the front end. The adjustment rotating block is rotatably connected to the guide sheath joint. The other end of the first traction line and the second traction line extend to the inner cavity of the guide sheath joint and are connected to the part of the adjustment rotating block extending into the guide sheath joint.

2. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 1, characterized in that: The first traction line is bonded to the left side of the inner wall of the sheath tube near the front end by means of fixing glue, and the second traction line is symmetrically bonded to the right side of the inner wall of the sheath tube near the front end by means of fixing glue.

3. The ureteroscope guide sheath with adjustable bending angle according to claim 2, characterized in that: The adjusting rotating block includes a control part, a shaft body and a support rod, the control part is connected to the upper end of the shaft body, the shaft body longitudinally penetrates the side wall of the guide sheath joint and is rotatably connected to the guide sheath joint, there are two support rods, both of which are fixed to the lower end of the shaft body, and the two shaft bodies are symmetrically distributed on the left and right, and the other ends of the first traction line and the second traction line extend to the inner cavity of the guide sheath joint and are respectively fixed to the two support rods.

4. The ureteroscope guide sheath with adjustable bending angle according to claim 3, characterized in that: The lower end of the shaft body is higher than the upper end of the channel, and the two support rods are inclined to the left and right sides from top to bottom respectively.

5. The ureteroscope guide sheath with adjustable bending angle according to claim 4, characterized in that: The first traction line and the second traction line are respectively fixed to the two support rods and the first traction line and the second traction line are respectively fixed to the left and right sides of the inner wall of the sheath tube (1) in the same plane.

6. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 3, characterized in that: The guide sheath joint is provided with a step groove communicating with the inner cavity of the guide sheath joint, a cover plate is bonded in the step groove, an axial hole is provided in the middle of the cover plate, and the shaft body is assembled in the axial hole.

7. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 6, characterized in that: A slot is provided at the upper end of the shaft body, a plug which is plugged into the slot is fixedly connected to the lower end of the control part, and the plug is bonded into the slot by fixing glue.

8. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 7, characterized in that: The shaft body and the support rod are an integrated structure.

9. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 8, characterized in that: The cross section of the control part is in an arc shape on a side close to the shaft body, and is in an arrow shape on a side away from the shaft body.

10. The flexible ureteroscope guide sheath with adjustable bending angle according to claim 9, characterized in that: The cover plate is provided with an angle scale groove.

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