A lithotripsy suction device after urological stone surgery

Abstract

This invention relates to the field of medical device technology, specifically to a lithotripsy and aspiration device after urological stone surgery. The device includes a sheath, with a sealed cavity at the inlet end of the sheath. An operating handle is provided on the sealed cavity, and a negative pressure aspiration device is connected to one side of the sealed cavity. The key feature is that a movable tube is provided in the middle section of the sheath. The movable tube contains several moving components for lithotripsy during its reciprocating motion under negative pressure. A connecting component is fixedly connected to the end of the movable tube near the sealed cavity to drive the reciprocating motion of the movable tube to cut and vibrate the lithotripsy fragments entering the movable tube. This invention, based on negative pressure drive, simultaneously achieves lithotripsy aspiration and dynamically drives the moving components within the movable tube to agitate and break up the lithotripsy fragments through the connecting components, thereby accelerating the stone aspiration efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a lithotripsy suction device after urological stone surgery. Background Technology

[0002] In the field of urology, endoscopic lithotripsy after stone surgery is a crucial step in determining surgical efficiency and final efficacy. Whether it's flexible ureteroscopic lithotripsy or percutaneous nephrolithotomy, an efficient stone removal process is essential. Ideally, the stone particles fragmented by the holmium laser should be quickly and completely removed from the body to avoid postoperative complications caused by residual stones, shorten surgical time, and improve treatment turnover.

[0003] Currently, the mainstream device for assisting in stone removal during flexible ureteroscopy is the ureteral negative pressure suction sheath. Existing ureteral sheaths on the market can only be used in flexible ureteroscopy. The procedure is as follows: first, dilate the ureter, then pre-place a stent tube around the ureter or directly explore the ureter with a rigid ureteroscope, and place a guidewire; then, insert the sheath, blindly pushing it down along the guidewire to the predetermined length, such as below the UPJ (ureteropelvic junction); finally, remove the inner core, and the flexible endoscope enters the kidney through the sheath. A newer product, the visual ureteral guide sheath from Zhejiang New Medical, allows for both visual sheath placement and use with both flexible and rigid endoscopes. It ensures a consistent outer diameter of the rigid endoscope, solving the problem of holding the endoscope. The rigid endoscope improves water return while breaking up stones in the ureter, achieving an effect similar to a ureteroscopy.

[0004] However, existing negative pressure suction sheaths have significant bottlenecks in suction efficiency, and their working principle has inherent flaws. Specifically, existing equipment relies entirely on the hydrodynamic force generated by negative pressure for suction, which is essentially a passive delivery mode. When the broken-up stones are large, especially the clinically common critical size of 3-4 mm, or when several fragments are aggregated, the existing suction sheath lacks continuous agitation or breaking ability, causing the fragments to easily re-aggregate within the lumen. This leads to fluctuations in suction efficiency and easily causes mechanical impingement at the sheath inlet or within the lumen, instantly blocking the negative pressure suction flow. Once blockage occurs, the negative pressure is rapidly lost, forcing the doctor to withdraw the flexible endoscope and suction sheath together, or attempt to clear the blockage through repeated suction and irrigation, severely disrupting the continuity of the procedure. For stones with a large burden, the entire stone removal process may be extended to one or two hours, making what should be a minimally invasive and efficient procedure lengthy.

[0005] Therefore, there is an urgent clinical need for a device specifically designed for ureteroscopic lithotripsy with active anti-blocking and fragmentation functions. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a lithotripsy and aspiration device after urological stone surgery. Based on negative pressure drive, it achieves lithotripsy and aspiration while dynamically driving the movable component inside the movable tube to disturb and break up the lithotripsy through the connecting component, thereby accelerating the stone aspiration efficiency.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a lithotripsy suction device after urological stone surgery, comprising a sheath, an input end of the sheath being connected to a sealed cavity, an operating handle being provided on the sealed cavity, a negative pressure suction device being connected to one side of the sealed cavity, a movable tube being provided in the middle section of the sheath, and a plurality of movable components being provided in the movable tube for lithotripsy when the movable tube reciprocates under negative pressure, and a connecting component being fixedly connected to one end of the movable tube near the sealed cavity for driving the movable tube to reciprocate to cut and shake the lithotripsy entering the movable tube;

[0008] The connecting assembly includes a first bellows and a second bellows from the outside to the inside. Both ends of the first bellows and the second bellows are fixedly connected to the sealing cavity and the movable tube, respectively. An interlayer is provided between the first bellows and the second bellows, and the interlayer communicates with the sealing cavity. A piston ring is provided in the interlayer. Several air tubes are connected to the first bellows. The diameters of the air tubes are all different. The end of the air tube away from the first bellows is connected to the outside of the sheath.

[0009] The technical principles of the above solution are as follows:

[0010] During the procedure, the doctor holds the operating handle and inserts the sheath through the urethra into the patient's ureter and into the post-stone surgery area. The doctor then activates the negative pressure suction device connected to the sealed cavity, creating a continuous negative pressure suction along the axis of the sheath, providing the power for the discharge of stone fragments and irrigation fluid.

[0011] The reciprocating motion of the movable tube adopts a double-layer corrugated tube structure with a first corrugated tube and a second corrugated tube. The two ends of the two corrugated tubes are sealed and fixed to the sealing cavity and the movable tube respectively, forming a closed interlayer space. The interlayer is connected to the inside of the sealing cavity through the air port. After the negative pressure machine is started, the negative pressure in the sealing cavity is conducted to the interlayer through the air port, so that a negative pressure environment is formed in the interlayer. This drives the piston ring in the interlayer to move towards the sealing cavity. The piston ring synchronously drives the fixedly connected movable tube to move in the same direction. At the same time, the piston ring is disengaged from the inlet end of the air port, and external air enters the interlayer to fill it with air, so that the first corrugated tube and the second corrugated tube are reset, which in turn drives the piston ring to reset.

[0012] The movable tube in the middle section of the sheath provides a targeted fragmentation channel for lithotripsy. The inner diameter of the movable tube is adapted to the common postoperative lithotripsy particle size, allowing larger particles to enter the movable tube preferentially. Several movable components inside the movable tube generate relative movement with the lithotripsy and irrigation fluid during the reciprocating motion of the movable tube. Through shearing and scraping action with the lithotripsy, the movable components further break down larger particles that have entered the movable tube, reducing their size to a size suitable for the sheath's flow. For lithotripsy fragments that may agglomerate during suction, the reciprocating disturbance of the movable components can achieve a dispersing effect, preventing lithotripsy from forming blockages inside the tube.

[0013] An annular gap is formed between the movable tube and the sheath, providing an auxiliary flow channel for fine gravel. Negative pressure suction acts simultaneously on both the inside of the movable tube and the annular gap, causing gravel of different sizes to be transported separately, reducing the risk of blockage in a single channel. Simultaneously, the dynamic flow field formed by the fluid within the annular gap under negative pressure assists in transporting fine gravel towards the sealed cavity. The gravel, broken by the movable component and the dispersed fine gravel, along with the injection fluid, flows towards the sealed cavity under negative pressure suction through the internal channels of the movable tube and the annular gap between the sheath and the movable tube, and is finally discharged from the body by the suction of the negative pressure suction device, completing the efficient removal of gravel.

[0014] The above approach has the following beneficial effects:

[0015] 1. In this solution, the movable tube, driven by the connecting component, reciprocates to cause the movable component to shear, scrape, and disturb the stone fragments. This not only further breaks larger stone fragments into a suitable flow size, but also disperses aggregated stone fragments. This fundamentally avoids the sheath blockage problem caused by uneven stone fragment size or agglomeration in traditional suction devices. It eliminates the need to interrupt the surgery and repeatedly withdraw the scope, significantly improving surgical efficiency. At the same time, it reduces the risk of complications such as ureteral damage and increased intrarenal pressure caused by blockage.

[0016] 2. In this solution, the connecting components use piston rings and trachea. The double-layer corrugated pipe design, with the first and second corrugated pipes nested together, ensures the sealing performance of the interlayer space, preventing negative pressure leakage from affecting the driving effect. It also buffers the impact force of the reciprocating motion of the moving tube, reducing mechanical stimulation to the patient's ureter and kidney tissue. The power source directly relies on the negative pressure suction of the negative pressure machine and the reset elastic force in the first and second corrugated pipes after gas is introduced into the trachea. There is no need to add additional complex components such as drive motors, which simplifies the overall structure of the device, reduces the size of the equipment and the difficulty of operation. At the same time, the periodic opening and closing of the solenoid valve enables precise control of the movement frequency of the moving tube, adapting to the crushing needs of different lithotripsy scenarios.

[0017] 3. This design achieves graded transport of lithotripsy of different sizes through the flow diversion via the annular gap between the movable tube and the sheath. Larger lithotripsy is broken up and discharged through the movable tube, while smaller lithotripsy is directly transported through the annular gap, forming a dual-pathway transport mode. This significantly reduces the flow pressure and blockage risk of a single channel. Simultaneously, the dynamic flow field within the annular gap assists in the rapid transport of smaller lithotripsy, which, combined with the breaking action of the movable tube, improves overall lithotripsy clearance efficiency and shortens surgical time. Furthermore, the dual-pathway design reduces the retention time of the perfusion fluid in the body, lowering the risk of postoperative infection. The coordinated operation of all components of the device does not require additional invasive procedures, ensuring the safety and tolerability of the patient's surgery.

[0018] Furthermore, each of the moving components includes convex ridges arranged in a ring and fixedly connected inside the moving tube.

[0019] Beneficial effects: When the moving tube reciprocates, these ridges directly mechanically interfere with the relatively stationary or differently flowing stones and fluids. Through shearing, collision and scraping, larger stones entering the tube are forcibly broken, reducing their particle size and lowering the risk of direct blockage of the tube.

[0020] Furthermore, the ridges are located inside the movable tube and are arranged in a spiral shape along the axial direction of the movable tube.

[0021] Beneficial effects: The spirally arranged ridges form a continuous and guiding crushing path inside the moving tube. First, it guides the crushed stone to rotate based on the axial movement under negative pressure, making it easier for it to contact and shear against the sides of the ridges, thus increasing the crushing probability and efficiency. Furthermore, the spiral path extends the effective processing distance of the crushed stone within the tube, ensuring that it undergoes continuous and repeated mechanical action over a longer distance, resulting in a more thorough crushing effect.

[0022] Furthermore, turbulence fins are provided between adjacent ridges, and the turbulence fins are fixedly connected to the inner wall of the movable tube, and the extension direction of the turbulence fins is consistent with the spiral direction of the ridge.

[0023] Beneficial effects: The turbulence fins, acting as a reinforcing structure for the spiral flow field, significantly intensify the rotational turbulence of the injection fluid inside the moving tube. This strong turbulence keeps the gravel particles in a continuously tumbling and suspended state, preventing their deposition within the moving tube and ensuring that all surfaces of the gravel are fully exposed to the crushing action, thus improving the uniformity of the crushing process. Simultaneously, the enhanced turbulence also improves the fluid's ability to carry gravel forward, accelerating the removal process.

[0024] Furthermore, a shielding component is provided on the inner wall of the sheath near the suction port. The shielding component is used to temporarily limit the stone from flowing into the sheath and blocking it. The shielding component includes several valves arranged in a ring along the inner wall of the sheath, and the valves are all arranged obliquely to the inner wall of the sheath.

[0025] Beneficial effects: The oblique valve can guide and divert the incoming cluster of stones, preventing multiple stones from blocking the sheath inlet at the same time; the valve gap allows small-diameter stones to pass through first, while large-diameter stones are temporarily blocked and then enter gradually, realizing the entry of stones in batches and reducing the probability of sheath blockage from the source.

[0026] Furthermore, the tilt direction of the valve is consistent with the rotation direction of the ridge.

[0027] Beneficial effects: The consistency of the guiding direction allows the crushed stone to enter the moving tube along a trajectory that matches the spiral direction of the convex ridge after being guided by the valve. This reduces abrupt changes in the movement direction of the crushed stone, lowers the resistance when entering the moving tube, increases the success rate of the crushed stone entering the moving tube, and enhances the overall flow channel continuity of the device.

[0028] Furthermore, a buffer layer is provided at the end of the valve near the sheath, and a miniature vibrator is provided at the end of the valve away from the sheath. The miniature vibrators are all connected to the controller signal.

[0029] Beneficial effects: The buffer layer can absorb the vibration of the micro-vibrator, avoiding sheath resonance damage to the patient's ureter and kidney tissue; the micro-vibrator is activated when the valve blocks large stones, and the high-frequency micro-vibration can not only break up 3-4mm stones in a secondary manner, but also loosen the adhered stones, ensuring that the stones enter the sheath smoothly, taking into account both the breaking effect and tissue safety.

[0030] Furthermore, a pressure sensor is installed on the side of the interlayer near the sealed cavity, and the pressure sensor is connected to the controller signal.

[0031] Beneficial effects: The pressure sensor monitors the pressure when the piston ring approaches the sealing cavity in real time and transmits the pressure signal to the controller, enabling the controller to accurately control the opening and closing timing of the solenoid valve, avoiding excessive movement of the piston ring that would cause excessive movement of the moving tube; thus achieving closed-loop control of the reciprocating motion of the moving tube.

[0032] Furthermore, the sheath is provided with a spiral guide groove, the spiral direction of which is opposite to the spiral direction formed by several convex ridges.

[0033] Beneficial effects: The reverse-rotating spiral guide channel causes the injection fluid in the annular gap to form a reverse swirling flow, which generates a stronger shearing effect with the outer wall of the moving tube, abrading fine gravel; at the same time, the flow field formed by the reverse rotation of the spiral guide channel and the convex ridge disturbs each other, enhances the centrifugal force of the eddy, and throws the gravel towards the sheath wall, effectively preventing circumferential blockage of the annular gap.

[0034] Furthermore, several flow guide holes are opened on the side wall of the active tube, and all flow guide holes are connected to the sheath tube.

[0035] Beneficial effects: The guide hole enables pressure exchange and fluid communication between the movable tube and the sheath, allowing the fluid in the annular gap to flow through the guide hole and the fluid in the movable tube to form convection, enhancing the vortex effect; at the same time, it balances the pressure inside and outside the movable tube, preventing stone debris from getting stuck due to pressure difference, and improving the smoothness of dual-channel delivery. Attached Figure Description

[0036] Figure 1 This is an isometric schematic diagram of an embodiment of the lithotripsy suction device for urological stone surgery of the present invention;

[0037] Figure 2 This is a side view of an embodiment of the lithotripsy suction device for urological stone surgery of the present invention;

[0038] Figure 3 For the present invention Figure 2 Axonometric sectional view of section AA in the middle;

[0039] Figure 4 This is a side cross-sectional schematic diagram of an embodiment of the lithotripsy suction device for urological stone surgery of the present invention;

[0040] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of part A in the middle.

[0041] The reference numerals in the accompanying drawings include: 1. Operating handle; 2. Sealed cavity; 3. Negative pressure suction device; 4. Sheath; 5. Spiral guide groove; 6. Guide hole; 7. Ridge; 8. Turbulence fin; 9. Movable tube; 10. Valve; 11. Trachea; 12. Piston ring; 13. Interlayer; 14. Second bellows; 15. First bellows. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following detailed description illustrates the specific implementation method:

[0046] Example:

[0047] In current ureteroscopic lithotripsy, while the use of negative pressure suction sheaths can assist in removing stone fragments, their suction efficiency still faces significant limitations. Specifically, after using a holmium laser to break up larger stones, the resulting fragments are prone to accumulating, becoming lodged, or even completely blocking the passage when passing through a traditional suction sheath. At this point, the negative pressure suction drops drastically, forcing the surgeon to repeatedly withdraw the endoscope from the sheath to attempt to clear the blockage or use other instruments to remove the fragments—a time-consuming and laborious process. A complex stone surgery can easily take one to two hours just for clearing the stone fragments, severely impacting surgical efficiency and its widespread adoption.

[0048] Based on the problems encountered in the aforementioned clinical practice, the inventors have proposed the following: Figure 1 The illustrated lithotripsy device for urological stone surgery includes a sheath 4, with a sealed cavity 2 connected to the input end of the sheath 4. An operating handle 1 is provided on the sealed cavity 2, and a negative pressure suction device 3 is connected to one side of the sealed cavity 2. Taking a patient with a stone of about 7mm in the renal pelvis as an example, during the operation, the doctor inserts the sheath 4 into the ureter through the urethra and reaches the renal pelvis area. Subsequently, a flexible ureteroscope reaches the stone location through the working channel of the sheath 4, and a holmium laser is used to systematically break the stone into a large number of fragments with a diameter of 1-4mm.

[0049] Initially, smaller stone particles and irrigation fluid are smoothly drawn out through the sheath 4 under the suction of the negative pressure suction device 3. When 3-4 mm fragments are drawn to the suction port at the end of the sheath 4 along with the water flow, a blocking component is provided on the inner wall of the sheath 4 near the suction port. The blocking component is used to temporarily prevent all stones from rushing into the sheath 4 and blocking it. The blocking component includes several valves 10 arranged in a ring along the inner wall of the sheath 4. The valves 10 are all arranged obliquely to the inner wall of the sheath 4. The arrangement of the valves 10 can guide and initially divert the incoming debris, preventing multiple pieces of debris from simultaneously blocking the inlet and sheath 4. The gaps between the valves 10 allow some debris of about 1 mm to continue entering the sheath 4. When debris of 3-4 mm comes into contact with the valves 10, it will be blocked by the valves 10 first, allowing debris smaller than 3 mm to enter from the center of the valves 10. The valves 10 are flexible, and under the continuous suction of negative pressure, the 3-4 mm debris will squeeze the valves 10 and eventually enter the sheath 4.

[0050] When 3-4 mm fragments are blocked by valve 10, a micro-vibrator is provided at the end of valve 10 away from sheath 4. The micro-vibrator is connected to the controller signal. The obstruction of valve 10 is observed through flexible ureteroscope. The doctor activates the controller to make the micro-vibrator generate high-frequency micro-vibration, which can not only break up such fragments again, but also loosen and separate other fragments that are adhered or stuck near valve 10, ensuring that fragments of different diameters can be smoothly dispersed into sheath 4. A buffer layer is provided at the end of valve 10 near sheath 4 to reduce the vibration transmitted by the micro-vibrator and avoid resonance of sheath 4, which would affect the patient's ureter and kidney tissue.

[0051] After the gravel enters sheath 4, it is mainly distributed into two pathways, such as... Figure 2 As shown, the middle section of the sheath tube 4 is provided with a movable tube 9. The inner diameter of the movable tube 9 is 4mm, and the inner diameter of the sheath tube 4 is 5mm. When 3-4mm gravel enters near the movable tube 9, since only the inner diameter of the movable tube 9 can allow it to pass through, this part of the gravel enters the movable tube 9. The movable tube 9 is provided with several movable components for gravel crushing when the movable tube 9 reciprocates under negative pressure.

[0052] Specifically, the reciprocating motion of the movable tube 9 depends on a connecting assembly fixedly connected to one end of the movable tube 9 near the sealing cavity 2. This assembly drives the movable tube 9 to reciprocate, cutting away any loose stones that vibrate and enter the movable tube 9. Figure 5As shown, the connecting assembly includes a first bellows 15 and a second bellows 14 from the outside to the inside. Both ends of the first bellows 15 and the second bellows 14 are fixedly connected to the bottom of the sealing cavity 2 and the top of the movable tube 9, respectively. A sandwich layer 13 is provided between the first bellows 15 and the second bellows 14, communicating with the sealing cavity 2. A piston ring 12 is provided inside the sandwich layer 13. Several air ports are opened at the communication point between the sandwich layer 13 and the sealing cavity 2. When the negative pressure continues to attract, the sandwich layer 13 is subjected to negative pressure suction, causing the piston ring 12 to move towards the side closer to the sealing cavity 2 (i.e., Figure 3 and Figure 4 The piston ring 12 moves to the right. Several air tubes 11 are connected to the first bellows 15. The diameters of the air tubes 11 are all different. The end of the air tube 11 away from the first bellows 15 is connected to the outside of the sheath 4. The movement of the piston ring 12 will drive the first bellows 15 and the second bellows 14 to compress, thereby pulling the movable tube 9 upward. At the same time, since the piston ring 12 no longer blocks the inlet end of the air tube 11 when it moves upward, the inlet end of the air tube 11 of any diameter can achieve the effect of step-by-step depressurization, so that the air pressure in the interlayer 13 returns to normal. This causes the first bellows 15 and the second bellows 14 to elastically reset in sequence. When the negative pressure is greater, the displacement of the piston ring 12 in the interlayer 13 is greater. When the interlayer 13 is filled with gas and the first bellows 15 and the second bellows 14 are reset, the first bellows 15 and the second bellows 14 drive the piston ring 12 to reset. The piston ring 12 re-blocks the inlet end of the air tube 11, thereby realizing the up-and-down reciprocating movement of the movable tube 9.

[0053] Each movable component includes a ring of protruding ridges 7 fixedly connected inside the movable tube 9. The protruding ridges 7 are arranged in a spiral shape along the axial direction of the movable tube 9. When the movable tube 9 reciprocates, the protruding ridges 7 generate relative shearing motion with the gravel and injection fluid entering the movable tube 9. For gravel that is close to the inner diameter of the movable tube 9 (3-4 mm), the protruding ridges 7 can generate shearing and scraping action during reciprocating motion, further breaking it down. For gravel that has agglomerated during the process of being attracted, the reciprocating ridges 7 can continuously agitate and disperse them, preventing the gravel from re-agglomerating into clumps inside the movable tube 9.

[0054] Each adjacent ridge 7 is provided with a turbulence fin 8, which is fixedly connected to the inner wall of the movable tube 9. The extension direction of the turbulence fin 8 and the tilting direction of the valve 10 are consistent with the spiral direction of the ridge 7. The consistency between the spiral direction of the valve 10 and the ridge 7 can play a preliminary guiding role for the stone fragments before they enter the movable tube 9, so that most of the stone fragments can enter the movable tube 9. The turbulence fin 8 enhances the turbulence of the injection fluid, so that the stone fragments are in a continuous rolling and suspended state, which accelerates the efficiency of stone fragment attraction.

[0055] Because of the annular gap between the movable tube 9 and the sheath 4, some gravel smaller than 1 mm may enter the annular gap. In this area, the sheath 4 has a spiral guide groove 5, the direction of which is opposite to the spiral direction formed by several convex ridges 7. On the other hand, the movable tube 9 has several guide holes 6 on its sidewall, all of which are connected to the sheath 4. The guide holes 6 allow pressure exchange and fluid exchange of the injection fluid, so that the injection fluid and gravel particles flowing through the annular gap are subjected to an additional rotational tangential force on top of the axial force of the negative pressure attraction, forming a high-speed vortex. The spirally arranged spiral guide grooves 5 and the counter-rotation guided by the valve 10 generate a stronger shearing effect in the injection fluid due to the relative motion between the outer wall of the movable tube 9 and the inner wall of the sheath 4, further abrading fine gravel and accelerating the gravel attraction efficiency. At the same time, the vortex field generated outward centrifugal force, which helps to throw the gravel particles toward the sheath wall and propel them forward, effectively preventing the gravel particles from circumferentially clogging in the annular gap.

[0056] After being dynamically disturbed and broken by the movable tube 9, and the stone fragments accelerated by the annular vortex grinding, they can smoothly pass through the sheath 4 and the second corrugated tube 14 of the movable tube 9, through the sealed cavity 2, and finally be completely sucked out of the body by the negative pressure suction device 3. The suction channel resistance is stable throughout the process, and the doctor does not need to interrupt the operation and repeatedly withdraw the endoscope due to blockage, so the suction and crushing of the stone can be carried out at the same time.

[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A lithotripsy suction device for urological stone surgery, comprising a sheath (4), the inlet end of the sheath (4) being connected to a sealed cavity (2), the sealed cavity (2) being provided with an operating handle (1), and a negative pressure suction device (3) being connected to one side of the sealed cavity (2), characterized in that, The middle section of the sheath (4) is provided with a movable tube (9). The movable tube (9) is provided with several movable components for crushing stones when the movable tube (9) reciprocates under negative pressure. The end of the movable tube (9) near the sealing cavity (2) is fixedly connected with a connecting component for driving the movable tube (9) to reciprocate to cut the stones that shake and enter the movable tube (9). The connecting assembly includes a first corrugated pipe (15) and a second corrugated pipe (14) from the outside to the inside. Both ends of the first corrugated pipe (15) and the second corrugated pipe (14) are fixedly connected to the sealing cavity (2) and the movable pipe (9), respectively. A sandwich (13) is provided between the first corrugated pipe (15) and the second corrugated pipe (14). The sandwich (13) is connected to the sealing cavity (2). A piston ring (12) is provided in the sandwich (13). Several air ports are opened at the connection between the sandwich (13) and the sealing cavity (2). Several air pipes (11) are connected to the first corrugated pipe (15). The diameters of the air pipes (11) are all different. The end of the air pipe (11) away from the first corrugated pipe (15) is connected to the outside of the sheath (4).

2. The lithotripsy and aspiration device after urological stone surgery according to claim 1, characterized in that, All moving components include convex ridges (7) arranged in a ring and fixedly connected inside the moving tube (9).

3. The lithotripsy and aspiration device after urological stone surgery according to claim 2, characterized in that, The ridges (7) are located inside the movable tube (9) and are arranged in a spiral shape along the axial direction of the movable tube (9).

4. The lithotripsy and aspiration device after urological stone surgery according to claim 3, characterized in that, A turbulence fin (8) is provided between adjacent ridges (7). The turbulence fin (8) is fixedly connected to the inner wall of the movable tube (9), and the extension direction of the turbulence fin (8) is consistent with the spiral direction of the ridge (7).

5. The lithotripsy and aspiration device after urological stone surgery according to claim 4, characterized in that, A shielding component is provided on the inner wall of the sheath (4) near the suction port. The shielding component is used to temporarily restrict all stones from flowing into the sheath (4) and blocking the sheath (4). The shielding component includes several valves (10) arranged in a ring along the inner wall of the sheath (4). The valves (10) are all arranged obliquely to the inner wall of the sheath (4).

6. The lithotripsy and aspiration device after urological stone surgery according to claim 5, characterized in that, The tilt direction of the valve (10) is consistent with the rotation direction of the ridge (7).

7. The lithotripsy and aspiration device after urological stone surgery according to claim 6, characterized in that, A buffer layer is provided at the end of the valve (10) near the sheath (4), and a micro vibrator is provided at the end of the valve (10) away from the sheath (4). The micro vibrators are all connected to the controller signal.

8. The lithotripsy and aspiration device after urological stone surgery according to claim 7, characterized in that, A pressure sensor is provided on the side of the interlayer (13) near the sealing cavity (2), and the pressure sensor is connected to the controller signal.

9. The lithotripsy and aspiration device after urological stone surgery according to claim 8, characterized in that, The sheath (4) is provided with a spiral guide groove (5), and the spiral direction of the spiral guide groove (5) is opposite to the spiral direction formed by several convex ridges (7).

10. The lithotripsy and aspiration device after urological stone surgery according to claim 9, characterized in that, Several guide holes (6) are opened on the side wall of the active tube (9), and the guide holes (6) are all connected to the sheath tube (4).

Images