Catheter sheath adopting reducing sheathing canal

Abstract

The utility model relates to the technical field of medical instruments, in particular to a catheter sheath adopting a variable-diameter sheathing canal, which comprises a guide wire, an expander and the variable-diameter sheathing canal, the guide wire is used for guiding the sheathing canal to penetrate into a human body, the expander penetrates into the guide wire so as to penetrate into the human body along the guide wire, the variable-diameter sheathing canal sleeves the expander, the sheathing canal is detachably connected with the expander, and the variable-diameter sheathing canal is detachably connected with the expander. The variable-diameter sheathing canal is provided with a front end used for stretching into a human body and a rear end used for being exposed out of the outer side of the human body, and the variable-diameter sheathing canal is gradually thickened from the front end to the rear end. The problems that due to the fact that sheathing canals are not matched, surgical instruments cannot penetrate into the human body smoothly, and great pain is brought to a patient are solved, the success rate of sheathing canal intervention into the body is increased, meanwhile, the pain of the patient is reduced, and the surgical instruments penetrate into the body of the patient smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a catheter sheath using a variable-diameter sheath tube. Background Art

[0002] In endourological surgery, a catheter sheath needs to be inserted into the patient's kidney or urinary catheter. By leaving the sheath in the patient's body, a channel is established for other medical devices to penetrate the patient's body, making it easier to insert other medical devices into the patient's body for surgery.

[0003] The existing sheath has a consistent diameter along its length, with the end that extends into the body and the end that is away from the body having the same diameter. Before inserting the catheter sheath into the patient's body, a sheath of appropriate diameter needs to be selected. When selecting a sheath, in addition to considering different parts of the kidney, the surgical instruments that are inserted into the sheath also need to be considered. If the diameter of the sheath is too small, the surgical instruments cannot be inserted into the sheath for surgical operation. If the diameter of the sheath is too large, it will cause greater pain to the patient and increase the risk of failure of sheath intervention in the body. However, in existing operations, in order to ensure that the surgical instruments can be smoothly inserted into the sheath, a sheath with a larger diameter is usually used to ensure that the surgical operation can proceed smoothly. However, in this case, the risk of sheath intervention in the body is greater, and the intervention is more likely to fail. In addition, a sheath with a larger diameter also causes greater pain to the patient.

[0004] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this application is to provide a catheter sheath using a variable diameter sheath, which solves the problem that the surgical instrument cannot be smoothly inserted into the human body due to sheath mismatch and causes great pain to the patient. It aims to increase the success rate of sheath intervention in the body while reducing the patient's pain and allowing the surgical instrument to smoothly penetrate the patient's body.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: a catheter sheath using a variable diameter sheath tube, comprising:

[0007] A guide wire, used to guide the guide sheath into the human body;

[0008] a dilator, the dilator being inserted into the guide wire to penetrate into the human body along the guide wire;

[0009] A reducing sheath is sleeved outside the dilator, the sheath is detachably connected to the dilator, the reducing sheath has a front end for inserting into the human body and a rear end for being exposed outside the human body, and the reducing sheath gradually becomes thicker from the front end toward the rear end.

[0010] Furthermore, the reducer sheath comprises a reducer body, the reducer body gradually becomes thicker from an end extending into the human body to an end away from the human body, and the dilator is inserted into the reducer body.

[0011] Furthermore, the variable diameter sheath tube further includes a sheath seat, which is arranged on the variable diameter tube body, and the dilator further includes an expansion seat, which is detachably mounted on the expansion seat.

[0012] Furthermore, a mounting groove is provided on the expansion seat.

[0013] Furthermore, a mounting block is provided on the sheath seat, and the mounting block is detachably mounted in the mounting groove.

[0014] Furthermore, a handle is installed on the outer ring of the sheath seat.

[0015] Furthermore, the expander also includes an expansion tube, which is installed on the end of the expansion seat close to the patient.

[0016] Furthermore, the expansion tube gradually becomes thicker from the end extending into the human body to the end away from the human body.

[0017] Furthermore, the guide wire includes a guiding section, and the dilator tube passes through the guiding section to guide the dilator and the reducing sheath tube to penetrate into the human body through the guiding section.

[0018] Furthermore, the guide wire further includes a bending section, which is arranged at one end of the guide section extending into the human body to prevent the dilator and the reducing sheath from continuing to extend into the human body.

[0019] Beneficial effects:

[0020] The present application provides a catheter sheath using a variable diameter sheath, which is used to improve the success rate of sheath catheter intervention in the body while reducing the pain of the patient. It includes a guidewire, a dilator, and a variable diameter sheath. The variable diameter sheath is placed outside the dilator, and the dilator slides along the guidewire and penetrates the human body. The variable diameter sheath gradually becomes thicker from the end that extends into the human body to the end that is away from the human body. Therefore, the thinner front end of the variable diameter sheath can facilitate the insertion of surgical instruments while reducing the pain of the patient, thereby improving the patient's comfort. The thicker rear end of the variable diameter sheath can also facilitate the insertion of the thicker rear end of the surgical instrument, thereby preventing the surgical instrument from detaching from the variable diameter sheath during the surgical operation and causing unnecessary harm to the patient. At the same time, the design of the gradually thickening outer diameter of the variable diameter sheath also allows the sheath to penetrate the human body more smoothly, preventing the sheath from getting stuck during the insertion process and causing unnecessary pain to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a catheter sheath using a variable diameter sheath tube in the present invention;

[0022] Figure 2 Schematic diagram of the guide wire in the present utility model;

[0023] Figure 3 This is a schematic diagram of the variable diameter sheath tube being sleeved on the dilator in the present invention;

[0024] Figure 4 Schematic diagram of the expander in the present invention;

[0025] Figure 5 It is a schematic diagram of the variable diameter sheath tube in the utility model.

[0026] Description of reference numerals:

[0027] 1. Guide wire; 11. Guide section; 12. Bending section; 2. Dilator; 21. Dilator seat; 211. Mounting slot; 22. Dilator tube; 3. Reducer sheath; 31. Reducer tube body; 32. Sheath seat; 321. Handle; 322. Mounting block. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions and advantages of this application clearer and more explicit, the following further describes this application in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain this application and are not intended to limit this application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "push and pull" and "open and close" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "push and pull" and "open and close" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0031] The present invention provides a catheter sheath using a variable diameter sheath. To make the purpose, technical solution, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention.

[0032] like Figures 1 to 5 As shown, a catheter sheath using a variable diameter sheath is used to improve the success rate of sheath intervention in the body while reducing patient pain. The catheter sheath using a variable diameter sheath includes a guidewire 1, a dilator 2, and a variable diameter sheath 3. The guidewire 1 is used to guide the catheter sheath into the human body. Before the entire catheter sheath is inserted into the human body, it is necessary to first establish a path for the catheter sheath to penetrate the human body through the guidewire 1. This guidewire 1 is used to guide the other components of the catheter sheath to gradually penetrate the human body, thereby preventing the catheter sheath from accidentally injuring other parts of the human body during the insertion process, causing unnecessary damage to the patient. The dilator 2 is inserted into the guide wire 1, and then the dilator 2 is inserted into the human body along the guide wire 1. At the same time, the reducing sheath 3 is set outside the dilator 2. The reducing sheath 3 is detachably connected to the dilator 2. The reducing sheath 3 has a front end for inserting into the human body and a rear end for exposing to the outside of the human body. The reducing sheath 3 gradually becomes thicker from the front end to the proximal end. Because in performing intracavitary urological surgery, surgical instruments such as seminal vesiculoscopes and ureteroscopes are required. The characteristics of these surgical instruments are that they are thin at the front and thick at the back, that is, the outer diameter of the end that inserts into the human body is thinner, and the outer diameter of the end that is away from the human body is thicker. Therefore, in order to adapt to such surgical instruments with different outer diameters, the reducing sheath 3 is provided with a plurality of reducing sheaths. The reducing sheath 3 is used to establish a channel for these surgical instruments to penetrate the human body. Therefore, the front end of the reducing sheath 3 is thinner, making it easier to penetrate the human body, reducing damage to the human body while allowing the front end of the surgical instrument to penetrate, and the rear end of the reducing sheath 3 is thicker, which can also accommodate the thicker rear end of the surgical instrument. Moreover, since the reducing sheath 3 adopts a reducing design, the reducing sheath gradually becomes thicker from front to back, which also makes the entire catheter sheath easier to penetrate the human body, avoiding the catheter sheath with a fixed outer diameter from getting stuck in the human body when penetrating into the human body, causing unnecessary pain to the patient.

[0033] Furthermore, the reducer sheath 3 includes a reducer body 31, which gradually thickens from the end that extends into the human body to the end that is away from the human body. Before performing an intracavitary urological surgery, the reducer body 31 is first used as a channel for other surgical instruments to enter the human body during the intracavitary urological surgery. These surgical instruments are smoothly inserted into the human body through the reducer body 31. Because these surgical instruments are designed to be thin at the front and thick at the back, the reducer body 31 is designed to be variable in diameter to accommodate these surgical instruments. Specifically, the end of the reducer body 31 that extends into the human body is thinner, allowing the front end of the surgical instrument to penetrate while avoiding the excessively thick sheath causing significant damage to the human body. The end of the reducer body 31 that is away from the human body is thicker. Since the rear end of the reducer body 31 is usually located outside the body or close to the surface of the body, the rear end of the thicker reducer body 31 will not cause significant damage to the human body. This also allows the rear end of the surgical instrument to be inserted into the rear end of the reducer body 31. In order to allow the variable diameter tube 31 to penetrate into the human body, the expander 2 is inserted into the variable diameter tube 31, and the expander 2 drives the variable diameter tube 31 to penetrate into the human body, thereby establishing a channel for surgical instruments to enter the human body.

[0034] In order to prevent the reducer 31 from falling off the dilator 2 when the dilator 2 drives the reducer 31 to penetrate the human body, causing the reducer 31 to fail to penetrate the human body, the reducer sheath 3 also includes a sheath seat 32, which is arranged on the reducer 31. The dilator 2 also includes an expansion seat 21. The sheath seat 32 is detachably mounted on the expansion seat 21. Therefore, when the reducer sheath 3 is sleeved on the dilator 2, the sheath seat 32 is mounted on the expansion seat 21, thereby fixing the relative position of the reducer 31 and the dilator 2, preventing relative movement between the reducer 31 and the dilator 2, and allowing the dilator 2 to smoothly drive the reducer 31 to penetrate the human body. After the reducer 31 has penetrated the human body, the sheath seat 32 is removed from the expansion seat 21, allowing the dilator 2 to be pulled out of the reducer 31. In this process, the guide wire 1 is also pulled out, and finally only the reducer 31 is left in the human body.

[0035] Specifically, in order to allow the sheath seat 32 to be detachably mounted on the expansion seat 21, the expansion seat 21 is provided with a mounting groove 211. The mounting groove 211 is composed of two connected grooves, one of which is arranged along the length direction of the dilator 2, one end is open, and the other end is connected to the groove arranged along the circumference of the dilator 2. At this time, the two sections of grooves are perpendicular to each other. In addition, a mounting block 322 is provided on the sheath seat 32. When the reducing sheath 3 is sleeved on the dilator 2, the mounting block 322 is aligned with the opening of the groove, and then the mounting block 322 enters the groove arranged along the length direction of the dilator 2 from the opening. After the reducing sheath 3 is sleeved, the mounting block 322 slides to the connection of the two sections of the groove, and then the reducing sheath 3 is rotated so that the mounting block 322 slides along the groove arranged along the circumference of the dilator 2, thereby snapping the mounting block 322 into the mounting groove 211 to complete the fixation of the reducing tube body 31 and the dilator 2. When the expander 2 drives the reducer tube 31 to penetrate the human body and needs to remove the fixation between the reducer tube 31 and the expander 2, the reducer sheath 3 is rotated so that the mounting block 322 slides along the mounting groove 211 to the connection between the two sections of the groove, and then the expander 2 is pulled out from the reducer tube 31. At this time, the mounting block 322 will also slide along the groove set in the length direction of the expander 2 and gradually be pulled out from the mounting groove 211, finally separating the sheath seat 32 and the expander seat 21 from each other, completing the removal of the reducer tube 31 and the expander 2.

[0036] When the expander 2 drives the reducer body 31 to penetrate the human body, in order to facilitate the penetration of the reducer body 31, a handle 321 is installed on the outer ring of the sheath seat 32. Therefore, when the medical staff penetrates the expander 2 and the reducer body 31 into the human body, they can grasp the handle 321 during the penetration process and gradually push the expander 2 and the reducer body 31 into the human body through the handle 321.

[0037] In order to enable the dilator 2 to drive the reducing sheath tube 3 to penetrate the human body, the dilator 2 also includes an dilator tube 22, which is installed at the end of the dilator seat 21 close to the patient. When the dilator 2 penetrates the reducing tube body 31, the dilator tube 22 extends into the reducing tube body 31 and extends from the end of the reducing tube body 31 extending into the human body, thereby driving the reducing sheath tube 3 to penetrate the human body. The section of the dilator 22 extending from the reducing tube body 31 is of a reducing design and is conical. At the same time, the dilator tube 22 and the reducing sheath tube 3 have a smooth transition to avoid the dilator 2 and the reducing sheath tube 3 having protrusions or uneven structures when penetrating the human body, thereby avoiding the dilator 2 and the reducing sheath tube 3 from scratching the human body when penetrating. At the same time, maintaining a smooth transition between the dilator tube 22 and the reducing sheath tube 3 can also clamp the dilator tube 22 into the reducing tube body 31, avoiding changes in the position between the dilator tube 22 and the reducing tube body 31, which affects the penetration of the dilator tube 22 and the reducing tube body 31. In addition, in order to avoid the expansion tube 22 and the reducing tube body 31 being affected in their penetration into the human body due to a gap between the expansion tube 22 and the reducing tube body 31, the expansion tube 22 gradually becomes thicker from the end extending into the human body to the end away from the human body, so that the portion of the expansion tube 22 located inside the reducing tube body 31 fits with the reducing tube body 31, thereby eliminating the gap between the expansion tube 22 and the reducing tube body 31 and ensuring that the expansion tube 22 and the reducing tube body 31 can smoothly penetrate the human body.

[0038] When the expansion tube 22 and the reducing tube body 31 penetrate into the human body, they need to slide along the guide wire 1 and gradually enter the human body. Specifically, the guide wire 1 includes a guide section 11, the expansion tube 22 penetrates the guide section 11, and then the expansion tube 22 slides along the guide section 11 and gradually enters the human body. Therefore, the expansion tube 22 is guided to slide by the guide section 11, thereby guiding the expander 2 and the reducing sheath 3 to penetrate into the human body. When the expansion tube 22 and the reducing tube body 31 penetrate into the human body, in order to limit the penetration depth of the expansion tube 22 and the reducing tube body 31 and avoid causing harm to the human body during the process of the expansion tube 22 and the reducing tube body 31 penetrating into the human body, the guide wire 1 also includes a bending section 12. The bending section 12 is arranged at the end of the guide section 11 extending into the human body, and is used to prevent the expander 2 and the reducing sheath 3 from continuing to extend into the human body. That is, when the expansion tube 22 slides along the guide wire 1 to the junction of the guide section 11 and the bending section 12, the bending section 12 can prevent the expansion tube 22 from continuing to slide, thereby blocking the expansion tube 2 and the reducing sheath 3 from sliding.

[0039] In summary, when it is necessary to use the catheter sheath with a reducing sheath in the present application to penetrate the patient's body so as to establish a channel for subsequent medical devices to penetrate the patient, firstly, the guide wire 1 is penetrated into the patient's body. When the guide wire 1 penetrates to a certain position, the penetration of the guide wire 1 is stopped. At this time, the reducing sheath 3 is placed on the dilator 2, and then the dilator seat 21 and the reducing sheath seat 32 are installed to fix the reducing sheath 3 and the dilator 2 to prevent the reducing sheath 3 and the dilator 2 from moving relative to each other. After the reducing sheath 3 and the dilator 2 are installed, the dilator 22 is aligned with the guide section 11, and then the dilator 22 is penetrated into the guide section 11, so that The expansion tube 22 drives the reducing tube body 31 to slide along the guide section 11. When the expansion tube 22 slides to the boundary between the guide section 11 and the bending section 12, the bending section 12 blocks the continued penetration of the expansion tube 22, so that the expansion tube 22 no longer continues to penetrate, and then the reducing tube body 31 reaches the designated penetration position, and the penetration of the expander 2 and the reducing sheath 3 is completed. At this time, the installation of the expansion seat 21 and the sheath seat 32 is released, and then the guide wire 1 and the expander 2 are pulled out of the patient's body together, and the reducing sheath 3 is left alone in the patient's body, so that other medical devices can be penetrated into the patient's body through the sheath reducing tube body 31 in the future.

[0040] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A catheter sheath using a variable diameter sheath tube, characterized in that: include: A guide wire, used to guide the guide sheath into the human body; a dilator, the dilator being inserted into the guide wire to penetrate into the human body along the guide wire; A reducing sheath is sleeved outside the dilator, the sheath is detachably connected to the dilator, the reducing sheath has a front end for inserting into the human body and a rear end for being exposed outside the human body, and the reducing sheath gradually becomes thicker from the front end toward the rear end.

2. The catheter sheath using a variable diameter sheath tube according to claim 1, characterized in that: The reducer sheath comprises a reducer body, which gradually becomes thicker from an end extending into the human body to an end away from the human body, and the dilator is inserted into the reducer body.

3. The catheter sheath using a variable diameter sheath tube according to claim 2, characterized in that: The variable diameter sheath tube further comprises a sheath seat, which is arranged on the variable diameter tube body. The dilator further comprises an expansion seat, which is detachably mounted on the expansion seat.

4. The catheter sheath using a variable diameter sheath tube according to claim 3, characterized in that: The expansion seat is provided with a mounting groove.

5. The catheter sheath using a variable diameter sheath tube according to claim 4, characterized in that: The sheath seat is provided with a mounting block, and the mounting block is detachably mounted in the mounting groove.

6. The catheter sheath using a variable diameter sheath tube according to claim 3, characterized in that: The outer ring of the sheath seat is provided with a handle.

7. The catheter sheath using a variable diameter sheath tube according to claim 3, characterized in that: The expander further comprises an expansion tube, which is mounted on an end of the expansion seat close to the patient.

8. The catheter sheath using a variable diameter sheath tube according to claim 7, characterized in that: The expansion tube gradually becomes thicker from the end extending into the human body to the end away from the human body.

9. The catheter sheath using a variable diameter sheath tube according to claim 7, characterized in that: The guide wire includes a guiding section, and the dilator tube passes through the guiding section to guide the dilator and the reducing sheath tube to penetrate into the human body through the guiding section.

10. The catheter sheath using a variable diameter sheath tube according to claim 9, characterized in that: The guide wire further comprises a bending section, which is arranged at one end of the guide section extending into the human body to prevent the dilator and the reducing sheath from continuing to extend into the human body.

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