Universal ureter guiding sheath
By designing the universal ureter to guide the sheath of the bending sheath tube and the multi -functional handle, the problem of low surgical efficiency in existing technologies and poor stones in existing technologies have been solved, and more efficient stone removal and surgical operations are achieved.
Patent Information
- Application Number
- CN202420462759.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The existing ureteral guide sheath surgery is inefficient and difficult to deal with larger stones. In the operation, the stone powder affects the visual field, resulting in poor stone clearance rate.
A universal ureteral guidance sheath is designed, including bending sheath tubes and multi -functional controllers. The expansion tube is expanded and the Ruer connector is used to achieve negative pressure attraction and rinse through the negative pressure interface and flushing port to improve the efficiency of surgery.
The multi -directionality of the ureteral guidance of the sheath can be achieved, which can more flexibly enter the renal pelvis and kidney cups, improve the stones removal rate and surgical efficiency, and reduce the difficulty of doctors' operations.
Smart Images
Figure CN222398605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a universal ureteral guiding sheath, belonging to the technical field of medical equipment. Background Art
[0002] Ureteroscopy is a pure laparoscopic minimally invasive surgery in urology. Usually, a ureteral guide sheath is used to pass from outside the body through the urethra and ureter to directly enter the channel of the renal pelvis. Then a ureteroscope is used to pass through the ureteral guide sheath directly into the surgical area to remove ureteral stones or renal pelvic stones. It is not affected by the curvature or thickness of the ureter or urethra, and is suitable for conservative treatment of various ureteral stones and some kidney stones.
[0003] However, the existing ureteral guide sheath surgery has low efficiency and can only handle relatively small stones, which affects the further development of ureteroscopic surgery. Specifically, the ureteral guide sheath mainly emphasizes the compression and torsion resistance. After being placed into the human body along the guide wire, the toughness of the ureteral guide sheath can relatively straighten the bend of the ureter, which is convenient for the entry, exit, rotation and other operations of the endoscope. Also because of the toughness of the pipe, the ureteral guide sheath can only be placed in the upper part of the ureter or just entering the renal pelvis, forming a channel parallel to the longitudinal axis of the body. It cannot bend into the renal pelvis and calyx, and it is impossible to approach the stones. At the same time, when the water flow is injected to flush the stone fragments out of the ureteral guide sheath during the operation, the stone powder affects the field of vision and accumulates in the kidneys, which affects the efficiency of the operation, resulting in a narrow field of vision for the doctor, inconvenient surgical operation, and poor stone clearance rate.
[0004] Therefore, a new ureteral guide sheath is urgently needed to be developed and designed. Summary of the invention
[0005] In view of the above existing technical problems, the utility model provides a universal ureteral guide sheath to achieve the technical purpose of improving surgical efficiency and stone removal rate.
[0006] To achieve the above-mentioned purpose, the utility model provides a universal ureteral guide sheath, comprising a bendable sheath tube and a multifunctional handle installed at its tail end, a dilating tube and a Luer connector installed at its tail end, and a dilating tube connector sleeved on the outer periphery of the Luer connector;
[0007] The multifunctional handle includes a main body channel, a negative pressure tube connected to the front top surface of the main body channel and tilted backward and upward, and a flushing tube connected to the front bottom surface of the main body channel and tilted backward and downward;
[0008] The top surface of the negative pressure tube is provided with an anti-slip structure, the tail end thereof is provided with a negative pressure interface, the bottom surface thereof is provided with a negative pressure control port, and a handle slider which can slide and adjust the size thereof is buckled inside the negative pressure control port;
[0009] The tail end of the flushing tube is provided with a flushing port, the outer periphery of which is connected to a Luer cap via a Luer cap strap, and the Luer cap is movably mounted on the flushing port;
[0010] The dilation tube is inserted into the main body channel of the multifunctional handle and the bendable sheath tube, and extends out of the front end of the bendable sheath tube;
[0011] The expansion tube joint movably buckled is mounted on the tail of the multifunctional handle so that the Luer joint is located at the tail end opening of the multifunctional handle main body channel.
[0012] The utility model further provides a circle of protrusions on the outer periphery of the tail end of the main channel of the multifunctional handle; the expansion tube joint includes two symmetrically arranged connecting arms; the outer sides of the rear parts of the two connecting arms are symmetrically provided with hand-gripping grooves, the inner sides of the middle parts are symmetrically connected to the outer periphery of the Luer connector, the inner sides of the front ends are symmetrically provided with grooves, and can be buckled on the protrusions of the main channel.
[0013] Furthermore, the utility model provides that the middle part of the main channel of the multifunctional handle is connected to a silicone cap via a silicone cap rope; a round hole is provided on the silicone cap, and after removing the expansion tube, the expansion tube joint and the Luer joint, the silicone cap can be movably installed on the tail end opening of the main channel of the multifunctional handle.
[0014] Furthermore, in the present invention, a circular handle grip is installed on the front bottom surface of the main body channel of the multifunctional handle, and the handle grip is located in front of the flushing pipe.
[0015] Furthermore, the utility model provides that after the Luer cap is removed, the flushing port of the flushing tube can be inserted with a pressure sensing device.
[0016] Furthermore, the utility model comprises, from front to back, a tube head section, a bending section connected to the rear end of the tube head section, and an extension section connected to the rear end of the bending section; the front end of the tube head section is set as an arc-shaped tip; the hardness of the bending section is less than the hardness of the extension section and can be bent; the hardness of the extension section is equal to the hardness of the tube head section.
[0017] Furthermore, the flexible sheath tube includes, from the inside to the outside, an inner tube made of PTFE modified material, a spring tube formed by winding steel wire around the outer wall of the inner tube, and an outer tube made of PEBAX material coated on the outer wall of the spring tube; the spring tube of the bending section is made of annealed steel wire.
[0018] Furthermore, the utility model comprises, from front to back, a front tube section and a rear tube section connected to the rear end of the front tube section; the front tube section is made of soft PP material and extends out of the front end of the bendable sheath tube; the rear tube section is made of hard PP material, and its hardness is greater than that of the front tube section.
[0019] In summary, the utility model achieves the technical effect of improving surgical efficiency and stone removal rate by improving the local hardness of the extension tube and the bendable sheath and adding a multifunctional design to the handle.
[0020] Compared with existing products, the technical advantages of this utility model are:
[0021] 1. The utility model makes the front tube section of the extension tube, as well as the tube head section and the bending section of the bendable sheath tube soft, so that it can follow the ureteroscope to achieve the effect of arbitrary bending, thereby sending the tube head section to a place that is difficult to reach with the existing sheath tube, and performing negative pressure suction to clear the stones, thereby achieving the purpose of clearing all the stones, and completely solving the problem of the stones not being able to be cleared.
[0022] 2. The negative pressure interface of the utility model can be connected to negative pressure suction, which is convenient for doctors to suck the broken stones out of the human body in time through the negative pressure suction port, and the field of vision is clearer. In addition, the negative pressure control port and the handle slider can control the size of the negative pressure suction at any time, which is convenient for keeping the pressure in the human renal pelvis within a certain range.
[0023] 3. On the one hand, the flushing port of the utility model can be filled with sterile distilled water or sterile saline, which is convenient for doctors to suck out the gravel from the flushing port while flushing, and enables doctors to have a clearer field of vision during surgery; on the other hand, the flushing port of the utility model can be inserted with a pressure sensing device, which is convenient for doctors to observe the pressure in the renal pelvis at any time during surgery.
[0024] 4. The silicone cap of the utility model is installed on the tail end opening of the main channel of the multifunctional handle, which is convenient for the endoscope to pass through the small hole of the silicone cap and also prevents the liquid from flowing out from the tail end opening of the main channel.
[0025] 5. The utility model fixes the Luer interface at the tail end opening of the main channel through the buckle structure of the expansion tube joint, and facilitates the removal of the expansion tube from the main channel, which is convenient for doctors to operate and improves surgical efficiency.
[0026] 6. The handle grip on the multifunctional handle of the utility model facilitates the doctor to operate with one hand, thereby improving the convenience of operation and surgical efficiency.
[0027] 7. The utility model adds multiple functions to the ureteral guide sheath handle, which is easy to operate, making the experience more comfortable for doctors and patients, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a structural schematic diagram of the utility model;
[0029] Figure 2 It is a structural schematic diagram of the expansion tube in the utility model;
[0030] Figure 3 It is a structural schematic diagram of the bendable sheath tube in the utility model;
[0031] Figure 4 This is a schematic diagram of the structure of the multifunctional handle in the utility model;
[0032] Figure 5 This is a front view of the handle slider in the utility model;
[0033] Figure 6 It is a side view of the handle slider in the utility model;
[0034] Figure 7 It is a structural schematic diagram of the expansion pipe joint in the utility model;
[0035] In the figure: 1. dilation tube, 2. bendable sheath, 3. multi-function handle, 3.1. negative pressure interface, 3.2. negative pressure control port, 3.3. anti-slip structure, 3.4. handle grip, 3.5. flushing tube, 3.6. negative pressure tube, 4. handle slider, 5. dilation tube joint, 5.1. Luer joint, 6. silicone cap, 7. Luer cap, 8. Luer cap rope. DETAILED DESCRIPTION
[0036] The present invention is further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as front, back, inside, outside...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0038] like Figure 1 As shown, this embodiment provides a universal ureteral guide sheath, including a multifunctional handle 3 and a bendable sheath tube 2 installed at its front end, a dilation tube 1 and a Luer connector 5.1 installed at its rear end, and a dilation tube connector 5 sleeved on the outer periphery of the Luer connector 5.1, which are specifically described as follows.
[0039] like Figure 1 , Figure 4As shown, the multifunctional handle 3 includes a main body channel, a negative pressure tube 3.6 connected to the front top surface of the main body channel and tilted upward and backward, and a flushing tube 3.5 connected to the front bottom surface of the main body channel and tilted downward and backward. In specific production, the various parts of the multifunctional handle 3 can be integrally formed by injection molding by an injection molding machine, and the bendable sheath 2 and the multifunctional handle 3 can be bonded together by UV glue.
[0040] The top surface of the negative pressure tube 3.6 is provided with an anti-slip structure 3.3, the tail end thereof is provided with a negative pressure interface 3.1, the bottom surface thereof is provided with a negative pressure control port 3.2, and the negative pressure control port 3.2 is buckled with a handle slider 4 which can slide back and forth along it and adjust the size of its opening, such as Figure 5 , Figure 6 shown.
[0041] In specific implementation, a negative pressure suction device is connected to the negative pressure interface 3.1 of the negative pressure tube 3.6, and the gravel can be sucked out of the human body through the negative pressure suction port in time. At the same time, the negative pressure interface 3.1 allows the doctor to have a clearer field of vision during surgery. In order to keep the pressure in the human renal pelvis within a certain range, a negative pressure control port 3.2 and a handle slider 4 are also designed on the negative pressure tube 3.6, which can control the size of the negative pressure suction at any time. In addition, an anti-slip structure 3.3 is provided on the top surface of the negative pressure tube 3.6 to increase friction so that the doctor's fingers do not slip during operation.
[0042] like Figure 5 , Figure 6 As shown, the handle slider 4 is directly buckled into the negative pressure control port 3.2 through the buckle structure, and can slide forward and backward along the negative pressure control port 3.2 to adjust the size of the air intake of the negative pressure control port 3.2, thereby adjusting the suction force of the negative pressure in the human body. In addition, the top surface of the handle slider 4 is provided with an anti-slip protrusion so that the fingers will not slip when sliding back and forth.
[0043] The tail end of the flushing tube 3.5 is provided with a flushing port, the rear part of which is connected to one end of a Luer cap string 8, the other end of the Luer cap string 8 is connected to a Luer cap 7, and the Luer cap 7 can be movably mounted on the flushing port.
[0044] In specific implementation, after breaking up the large stones with laser, the doctor can remove the Luer cap 7, add sterile distilled water or sterile saline from the flushing port, and flush and aspirate the broken stones; or the doctor can first remove the Luer cap 7, and flush and aspirate the broken stones during the lithotripsy operation. In addition, the flushing port allows the doctor to have a clearer field of vision during the operation, thereby improving the efficiency of the operation.
[0045] In other embodiments, the middle of the main channel of the multifunctional handle 3 is connected to one end of the silicone cap rope, and the other end of the silicone cap rope is connected to the silicone cap 6; a round hole is opened on the silicone cap 6 to facilitate the insertion of the endoscope.
[0046] During specific implementation, after removing the flexible sheath 2, the expansion tube joint 5 and the Luer joint 5.1, the silicone cap 6 can be movably covered on the tail end opening of the main channel of the multifunctional handle 3, and the endoscope is inserted through the circular hole, which facilitates the surgical operation while preventing the liquid from flowing out of the tail end opening of the main channel.
[0047] In other embodiments, in order to make it more convenient for doctors to perform surgical operations, a circular handle grip 3.4 is installed on the front bottom surface of the main channel of the multifunctional handle 3, and the handle grip 3.4 is located in front of the flushing tube 3.5.
[0048] During specific implementation, the handle grip 3.4 enables the doctor to operate the universal ureteral guide sheath with one hand, thereby improving the operation efficiency.
[0049] In other embodiments, after the Luer cap 7 is removed, the flushing tube 3.5 can be equipped with a pressure sensing device, so that the doctor can observe the pressure in the renal pelvis at any time during the operation, thereby improving the efficiency of the operation.
[0050] like Figure 1 As shown, the dilation tube 1 is inserted into the main channel of the multifunctional handle 3 and the bendable sheath 2 , and extends out of the front end of the bendable sheath 2 .
[0051] In other embodiments, Figure 3 As shown, the bendable sheath tube 2 includes, from front to back, a tube head section, a bending section connected to the rear end of the tube head section, and an extension section connected to the rear end of the bending section; the front end of the tube head section is set as an arc-shaped tip; the hardness of the bending section is less than the hardness of the extension section and can be bent; the hardness of the extension section is equal to the hardness of the tube head section.
[0052] It should be noted that, since the head of the existing ureteral guide sheath can be bent, the head of the ureteral soft mirror has a snake bone and can be freely turned in the renal pelvis by pulling the steel wire, the utility model utilizes this characteristic of the soft mirror to make the tube head section and the bending section of the flexible sheath 2 soft, so that it can follow the soft mirror to achieve the effect of arbitrary bending, thereby sending the tube head section to places that are difficult to reach with the existing sheath.
[0053] In specific implementation, the bendable sheath tube 2 is composed of a three-layer structure as a whole, which includes, from the inside to the outside, an inner tube made of PTFE modified material, a spring tube formed by winding stainless steel wire on the outer wall of the inner tube, and an outer tube made of PEBAX material coated on the outer wall of the spring tube. In particular, the spring tube of the bending section adopts annealed steel wire in stainless steel wire, or anneals ordinary stainless steel wire. Annealing refers to heating the metal to a certain temperature, such as 600-700°C, to rearrange its grain boundaries and dislocation structures, thereby eliminating internal stress and deformation, and refining the grains, improving the plasticity and toughness of the metal, thereby reducing the hardness of the spring tube at the bending section, improving the plasticity and toughness of the bending section, and achieving the effect of arbitrary bending. In addition, the bending angle of the bending section is 0-280°, which is basically consistent with the bending angle of the soft mirror, and the operating feel of the soft mirror does not change much, and the damage to the snake bone and wire rope of the soft mirror is minimized. At the same time, the spring tubes of the tube head section and the extension section adopt ordinary stainless steel wire, which are all normal hardness of the three-layer structure of the utility model.
[0054] In other embodiments, Figure 2 As shown, in order to smoothly and safely deliver the front end of the bendable sheath tube 2 to the stone position, the front end of the dilation tube 1 is also treated with a soft head, so as to avoid the utility model from damaging human tissue when penetrating into the human body. The dilation tube 1 includes a front tube section and a rear tube section connected to the rear end of the front tube section from front to back; wherein, the front tube section adopts a soft PP material and extends out of the front end of the bendable sheath tube 2, and the length is generally 5-30mm; the rear tube section adopts a hard PP material, and its hardness is greater than the hardness of the front tube section.
[0055] In specific implementation, a front pipe section and a rear pipe section are first extruded through an injection molding machine respectively; then the two sections are heated by a cutting machine to fuse them together, and the required length is cut according to demand to form an expansion tube 1; then the expansion tube 1 and the expansion tube joint 5 are injection-molded together by an injection molding machine.
[0056] like Figure 1 As shown, the expansion tube connector 5 can be movably buckled on the tail of the multifunctional handle 3, so that the Luer connector 5.1 is fixed at the tail end opening of the main body channel of the multifunctional handle 3.
[0057] In other embodiments, Figure 7 As shown, the expansion tube connector 5 is movably mounted on the multifunctional handle 3 through a buckling structure. Specifically, a circle of protrusions is provided on the outer periphery of the tail end of the main body channel of the multifunctional handle 3; the expansion tube connector 5 includes two symmetrically arranged connecting arms; the outer rear sides of the two connecting arms are symmetrically provided with hand-gripping grooves, the inner sides of the middle parts are symmetrically connected to the outer periphery of the Luer connector 5.1, and the inner sides of the front ends are symmetrically provided with grooves, which can be buckled on the protrusions of the main body channel.
[0058] In addition, the use process of the utility model is as follows: during surgery, the expansion tube 1 is first inserted into the main channel of the multifunctional handle 3 and the bendable sheath tube 2, and the front end of the bendable sheath tube 2 is extended; then the front end of the expansion tube connector 5 is buckled at the tail end of the main channel of the multifunctional handle 3. At this time, the Luer connector 5.1 is installed at the tail end of the expansion tube 1 and fixed at the tail end opening of the main channel of the multifunctional handle 3, thereby preventing gas from coming out from the tail end of the expansion tube 1.
[0059] After the operation reaches the designated position of the renal pelvis, the buckle of the expansion tube joint 5 is loosened, and the expansion tube 1 is taken out from the flexible sheath tube 2 and the main channel of the multifunctional handle 3 through the expansion tube joint 5. The silicone cap 6 is installed on the tail end opening of the main channel of the multifunctional handle 3, and then the endoscope is inserted through the small hole of the silicone cap 6 to prevent liquid from flowing out from the tail end opening of the main channel during subsequent operations.
[0060] Remove the Luer cap 7 on the flushing port 3.5, and connect the negative pressure suction device at the negative pressure interface 3.1. Then use the injection needle to inject physiological saline into the renal pelvis from the flushing port 3.5 to flush out the gravel in the renal pelvis. Finally, the physiological saline and the gravel are flushed out through the negative pressure interface 3.1, thereby removing the ureteral stones or renal pelvic stones. At the same time, the air intake size of the negative pressure control port 3.2 is controlled by the handle slider 4, so as to control the size of the negative pressure suction at any time.
[0061] In summary, the utility model can be widely used in conservative treatment of various ureteral stones and some kidney stone surgeries. In addition, the utility model has strong versatility, high comfort, easy use, high surgical efficiency, and brings a lot of convenience to doctors and patients during use.
[0062] Although the principle of the present invention is described in detail above in conjunction with the preferred embodiments, those skilled in the art should understand that the above embodiments are only explanations of the exemplary implementation of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute limitations on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solution of the present invention fall within the scope of protection of the present invention.
Claims
1. A universal ureteral guide sheath, characterized in that: It includes a bendable sheath tube and a multifunctional handle installed at the tail end thereof, an expansion tube and a Luer connector installed at the tail end thereof, and an expansion tube connector sleeved on the outer periphery of the Luer connector; The multifunctional handle includes a main body channel, a negative pressure tube connected to the front top surface of the main body channel and tilted backward and upward, and a flushing tube connected to the front bottom surface of the main body channel and tilted backward and downward; The top surface of the negative pressure tube is provided with an anti-slip structure, the tail end thereof is provided with a negative pressure interface, the bottom surface thereof is provided with a negative pressure control port, and a handle slider which can slide and adjust the size thereof is buckled inside the negative pressure control port; The tail end of the flushing tube is provided with a flushing port, the outer periphery of which is connected to a Luer cap via a Luer cap strap, and the Luer cap is movably mounted on the flushing port; The dilation tube is inserted into the main body channel of the multifunctional handle and the bendable sheath tube, and extends out of the front end of the bendable sheath tube; The expansion tube joint movably buckled is mounted on the tail of the multifunctional handle so that the Luer joint is located at the tail end opening of the multifunctional handle main body channel.
2. A universal ureteral guide sheath according to claim 1, characterized in that: A circle of protrusions is provided on the outer periphery of the tail end of the main channel of the multifunctional handle; the expansion tube joint includes two symmetrically arranged connecting arms; the outer sides of the rear parts of the two connecting arms are symmetrically provided with hand-gripping grooves, the inner sides of the middle parts are symmetrically connected to the outer periphery of the Luer connector, and the inner sides of the front ends are symmetrically provided with grooves, which can be buckled on the protrusions of the main channel.
3. The universal ureteral guide sheath according to claim 1, characterized in that: The middle part of the main channel of the multifunctional handle is connected to a silicone cap through a silicone cap rope; a round hole is opened on the silicone cap, and after removing the expansion tube, the expansion tube joint and the Luer joint, the silicone cap can be movably installed on the tail end opening of the main channel of the multifunctional handle.
4. A universal ureteral guide sheath according to claim 1 or 3, characterized in that: A circular handle grip is installed on the front bottom surface of the main body channel of the multifunctional handle, and the handle grip is located in front of the flushing pipe.
5. A universal ureteral guide sheath according to claim 1 or 3, characterized in that: The flushing port of the flushing tube can be inserted with a pressure sensing device after the Luer cap is removed.
6. The universal ureteral guide sheath according to claim 1, characterized in that: The bendable sheath tube includes, from front to back, a tube head section, a bending section connected to the rear end of the tube head section, and an extension section connected to the rear end of the bending section; the front end of the tube head section is set as an arc-shaped tip; the hardness of the bending section is less than the hardness of the extension section and can be bent; the hardness of the extension section is equal to the hardness of the tube head section.
7. The universal ureteral guide sheath according to claim 6, characterized in that: The bendable sheath tube includes, from inside to outside, an inner tube made of PTFE modified material, a spring tube formed by winding steel wire around the outer wall of the inner tube, and an outer tube made of PEBAX material coated on the outer wall of the spring tube; the spring tube of the bending section is made of annealed steel wire.
8. A universal ureteral guide sheath according to claim 1 or 6, characterized in that: The expansion tube includes a front tube section and a rear tube section connected to the rear end of the front tube section from front to back; the front tube section adopts soft PP material and extends out of the front end of the bendable sheath tube; the rear tube section adopts hard PP material, and its hardness is greater than that of the front tube section.