Handheld continuous perfusion device and ureteroscope multifunctional sheath system

Abstract

The utility model discloses a handheld continuous perfusion device and a multifunctional sheath system for ureteroscope. The handheld continuous perfusion device includes a housing, a manual crank, a reciprocating mechanism, a piston injection device, a one-way valve, a device liquid inlet and a device liquid outlet; each piston injection device includes an injection water inlet, an injection water outlet, a piston and a syringe, and the reciprocating mechanism includes two transmission rods and a transmission member, two pistons are respectively arranged at the top of the two transmission rods, and the transmission member is connected to the manual crank; when the manual crank is rotated, the two pistons are driven to reciprocate in the syringe respectively; the two injection water inlets are respectively connected to the device liquid inlet through a one-way valve, and the two injection water outlets are respectively connected to the device liquid outlet through a one-way valve. The utility model can continuously inlet and outlet water, facilitate timely and dynamic adjustment of the perfusion volume and perfusion pressure during surgery, monitor the perfusion pressure and renal pelvic pressure in real time to improve the safety of surgery, and has a compact structure and is easy to grasp.

Description

Technical Field

[0001] The utility model relates to a handheld continuous perfusion device and a multifunctional sheath system for a ureteroscope. Background Art

[0002] Urinary tract stones are one of the most common diseases in urology, and rank first among inpatients in urology. The incidence of urinary tract stones in my country is 1% to 5%, and as high as 5% to 10% in the south; the annual incidence is about 150 to 200 per 100,000 people, of which 25% of patients need hospitalization.

[0003] With the advancement of technology and the development of medical devices, the current treatment for urinary stones mainly adopts minimally invasive laser treatment with intracavitary endoscopes. However, minimally invasive laser lithotripsy with intracavitary endoscopes often requires continuous and uninterrupted injection of saline along the endoscopic instrument channel to maintain a clear field of vision and remove the heat generated by laser lithotripsy. Although minimally invasive surgery, there are still many risks.

[0004] Since the kidney is a blind end, high renal pelvic pressure is likely to occur during intraoperative perfusion of saline, causing bacteria to enter the blood from the kidney, resulting in bacteremia and, in severe cases, urinary sepsis, which is life-threatening. Therefore, it is urgent to monitor perfusion pressure and renal pelvic pressure during surgery, but there is currently no good non-invasive monitoring method.

[0005] At present, there are two main ways to infuse saline during surgery. One is to inject water with a manual syringe, which has the following disadvantages: 1) It is usually a 50ml syringe. After the injection is completed, the syringe needs to be re-injected with saline before it can work again, so there is a pause in the middle, which forces the operation to stop, affecting medical safety; 2) Due to the long time, often 1-2 hours, or even 3 hours, the manual syringe injects saline, which seriously consumes the doctor's physical strength and affects the next operation. 3) There is no pressure measuring device, and the perfusion pressure and renal pelvic pressure cannot be understood in real time, which poses a risk of urinary bacteremia. 4) Manually pushing the syringe for a long time is prone to fatigue, and the water injection is sometimes light and sometimes heavy, resulting in unstable water injection pressure during surgery, affecting the efficiency of lithotripsy.

[0006] The second is the medical perfusion pump. Its disadvantages are: 1) The equipment is expensive, costing hundreds of thousands of yuan each, and some hospitals find it difficult to purchase it, or only purchase one. Since urinary stones are a common disease, a hospital often uses multiple endoscopic laser lithotripsy machines every day, which is difficult to meet daily needs; 2) Once the water pressure of the perfusion pump is set, if fine-tuning is required during the operation, the operation needs to be suspended, and it cannot be adjusted dynamically in real time according to actual needs; 3) There is no pressure measuring device, so the perfusion pressure and renal pelvic pressure cannot be understood in real time, and there is a risk of urinary bacteremia. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the perfusion device may pause during use, there are safety hazards affecting the efficiency of the operation, the electric perfusion pump is expensive, the hydraulic pressure is difficult to control and master, and there are surgical risks. A handheld continuous perfusion device and a multifunctional sheath system for ureteroscope are provided, which have continuous water inlet and outlet, facilitate timely and dynamic adjustment of the perfusion volume and perfusion pressure during the operation, monitor the perfusion pressure and renal pelvic pressure in real time, and improve the safety of the operation.

[0008] The utility model solves the above technical problems through the following technical solutions:

[0009] A handheld continuous perfusion device, characterized in that the handheld continuous perfusion device comprises a housing, a manual crank, a reciprocating mechanism, at least two piston injection devices, at least four one-way valves, a device liquid inlet and a device liquid outlet;

[0010] Each piston-type injection device comprises an injection water inlet, an injection water outlet, a piston and an injection barrel, and the injection water inlet and injection water outlet of the same piston-type injection device are both arranged at the front end of the injection barrel;

[0011] The reciprocating mechanism includes two transmission rods and a transmission member, two pistons are respectively arranged at the top ends of the two transmission rods, the transmission rod with the piston is arranged in the injection cylinder, and the transmission member is connected to the manual crank;

[0012] When the manual crank is rotated, the two pistons are driven to reciprocate in the injection cylinder through the reciprocating mechanism;

[0013] Each injection water inlet is connected to the device liquid inlet through a one-way valve, and the one-way valve between the injection water inlet and the device liquid inlet conducts the fluid from the device liquid inlet to the injection water inlet. Each injection water outlet is connected to the device liquid outlet through a one-way valve, and the one-way valve between the injection water outlet and the device liquid outlet conducts the fluid from the injection water outlet to the device liquid outlet.

[0014] Preferably, the reciprocating mechanism includes a reciprocating screw and a guide crescent pin, and the two transmission rods are an integrated structure. The two transmission rods are the left half and the right half of the reciprocating screw respectively. The two pistons are respectively arranged at both ends of the reciprocating screw. When the manual crank is rotated, the reciprocating screw drives the two pistons to reciprocate in the injection cylinder respectively.

[0015] Preferably, the transmission member includes a driving gear and a driven gear, the driving gear is connected to the manual crank, the guide crescent pin is provided in the driven gear, the reciprocating screw passes through the middle hole of the driven gear and is connected to the guide crescent pin, when the manual crank rotates, the driven gear is driven to rotate through the driving gear, and the guide crescent pin drives the reciprocating screw to reciprocate along the screw axis when the driven gear rotates.

[0016] Preferably, the driving gear and the driven gear are compound staggered axis bevel gears, the driven gear includes a left gear plate and a right gear plate, a crescent pin mounting cavity of the guide crescent pin is provided between the left gear plate and the right gear plate, a rotating shaft is provided at the top end of the guide crescent pin, and a rotating shaft mounting groove matching the rotating shaft is provided at the top of the crescent pin mounting cavity.

[0017] Preferably, the reciprocating mechanism includes a gear box fixed to the housing, the gear box includes a left mounting portion and a right mounting portion, a gear mounting cavity for a driving gear and a driven gear is provided in the gear box, the driving gear and the driven gear are installed in the gear mounting cavity through a shaft sleeve, and the middle hole position of the driven gear matches the shape and position of the middle hole position of the gear box.

[0018] Preferably, a pipeline connecting device is provided on the top of the gear box, and the pipeline connecting device includes a mounting base, a left branch and a right branch. The mounting base is installed on the top of the gear box, and the left branch and the right branch are connected in the mounting base. The left branch includes a water outlet confluence and a device liquid outlet connected to the water outlet confluence, and the right branch includes another water outlet confluence, and the two water outlet confluences are respectively connected to two injection water outlets. A water inlet branch is fixed on the outside of the right branch, and the water inlet branch includes a device liquid inlet and two water inlet branch ports connected to the device liquid inlet, and the two water inlet branch ports are respectively connected to two injection water inlets. A pressure gauge connecting port connected to the water outlet confluence is provided on the top of the pipeline connecting device.

[0019] Preferably, the side surface of the reciprocating screw comprises a concave arc surface structure, and the shapes of the middle hole of the movable gear and the middle hole of the gear box match the cross-section of the reciprocating screw.

[0020] Preferably, the reciprocating mechanism comprises a rounded rectangular internal gear and a broken gear, the broken gear is connected to the manual crank, the broken gear is arranged inside the internal gear and drives the broken gear to reciprocate, and the transmission rod is arranged at both ends of the internal gear; or,

[0021] The reciprocating mechanism includes a sprocket and a chain matched with the sprocket, the length of the chain is less than the circumference of the outer teeth of the sprocket, the transmission rod is arranged at both ends of the chain, the sprocket is connected to the manual crank, and the sprocket drives the incomplete gear to reciprocate.

[0022] Preferably, the reciprocating mechanism includes a first sub-mechanism and a second sub-mechanism, the first sub-mechanism includes a connecting rod and a central axis arranged in the middle of the connecting rod, the transmission rod is arranged at both ends of the connecting rod, and the transmission rod is arranged on the same side of the connecting rod, and the second sub-mechanism is connected to one end of the connecting rod and drives the connecting rod to reciprocate by rotating a manual crank.

[0023] The present application also provides a ureteroscope multifunctional sheath system, which is characterized in that the ureteroscope multifunctional sheath system includes the handheld continuous perfusion device as described above and the ureteroscope multifunctional sheath, the ureteroscope multifunctional sheath includes an outer sheath and a sheath core, the outer sheath includes an outer sheath water inlet, and the handheld continuous perfusion device is connected to the outer sheath water inlet.

[0024] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0025] The positive and progressive effects of the utility model are:

[0026] The utility model can continuously inlet and outlet water, facilitates timely and dynamic adjustment of perfusion volume and perfusion pressure during surgery, monitors perfusion pressure and renal pelvis pressure in real time to improve surgical safety, and has a compact structure and is easy to grasp.

[0027] Specifically, the advantages of the present invention are:

[0028] 1. Wheel design saves doctors' energy and does not affect the operation.

[0029] 2. The piston design allows for continuous water inflow and outflow, and has the function of a "pump", which allows for uninterrupted water injection throughout the entire process to ensure a clear surgical field of view.

[0030] 3. Manual rotation can dynamically adjust the perfusion volume and perfusion pressure in time according to the intraoperative situation to ensure the safety of the operation.

[0031] 4. Disposable, safe, cost-saving, and does not affect multiple surgeries at the same time.

[0032] 5. A pressure gauge is provided to monitor the perfusion pressure and renal pelvic pressure in real time. During perfusion, the perfusion pressure can be known. When the perfusion is suspended, the water outlet of the device is the same as the renal pelvis through the endoscope instrument channel, and the renal pelvic pressure can be measured to ensure the safety of the operation and prevent the occurrence of urinary sepsis. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a handheld continuous perfusion device according to Example 1 of the utility model.

[0034] Figure 2This is another structural schematic diagram of the handheld continuous perfusion device of Example 1 of the utility model.

[0035] Figure 3 This is another structural schematic diagram of the handheld continuous perfusion device of Example 1 of the utility model.

[0036] Figure 4 This is another structural schematic diagram of the handheld continuous perfusion device of Example 1 of the utility model.

[0037] Figure 5 This is another structural schematic diagram of the handheld continuous perfusion device of Example 1 of the utility model.

[0038] Figure 6 It is a schematic diagram of the side structure of the reciprocating screw of Example 1 of the utility model.

[0039] Figure 7 This is a schematic structural diagram of the guide crescent pin of Example 1 of the utility model.

[0040] Figure 8 This is a schematic structural diagram of the pipeline connection device of Example 1 of the utility model.

[0041] Fig. 9 This is a schematic structural diagram of a handheld continuous perfusion device according to Example 2 of the utility model.

[0042] Fig.10 This is a schematic diagram of the structure of a handheld continuous perfusion device according to Example 3 of the utility model.

[0043] Fig.11 This is a schematic structural diagram of a handheld continuous perfusion device according to Example 4 of the utility model. DETAILED DESCRIPTION

[0044] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0045] Example 1

[0046] In this embodiment, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] The present embodiment provides a multifunctional sheath system for a ureteroscope, and the multifunctional sheath system for a ureteroscope includes a handheld continuous perfusion device and a multifunctional sheath for a ureteroscope.

[0048] The multifunctional sheath of the ureteroscope comprises an outer sheath and a sheath core, the outer sheath comprises an outer sheath water inlet, and the device outlet of the handheld continuous perfusion device is connected to the outer sheath water inlet.

[0049] See also Figures 1 to 8 The handheld continuous perfusion device includes a housing 100 , a manual crank 101 , a reciprocating mechanism 102 , two piston injection devices 103 , at least four one-way valves 104 , a device liquid inlet 105 , and a device liquid outlet 106 .

[0050] Each piston-type injection device 103 includes an injection water inlet 1031 , an injection water outlet 1032 , a piston 1033 and a syringe 1034 .

[0051] The injection water inlet 1031 and the injection water outlet 1032 of the same piston injection device 103 are both arranged at the front end of the injection cylinder. In this embodiment, the rear end of the injection cylinder is close to the manual crank (ie, the driving gear of the reciprocating mechanism).

[0052] The reciprocating mechanism 102 includes two transmission rods and a transmission member. Two pistons are respectively disposed at the top ends of the two transmission rods. The transmission rod with the piston is disposed in the syringe. The transmission member is connected to the manual crank.

[0053] There are many styles of reciprocating mechanisms, and solutions in which both ends of the reciprocating mechanism can be connected to the transmission rod fall within the protection scope of this application.

[0054] When the manual crank 101 is rotated, the two pistons are driven to reciprocate in the syringe through the reciprocating mechanism;

[0055] The two injection water inlets 1031 are connected to the liquid inlet 105 of the device through a one-way valve 104 respectively.

[0056] The one-way valve between the injection water inlet 1031 and the device liquid inlet 105 conducts the fluid from the device liquid inlet 105 to the injection water inlet 1031 .

[0057] The two injection water outlets 1032 are connected to the liquid outlet 106 of the device through a one-way valve 104 respectively.

[0058] The one-way valve between the injection water outlet 1032 and the device liquid outlet 106 conducts the fluid from the injection water outlet 1032 to the device liquid outlet 106 .

[0059] The reciprocating mechanism 102 includes a reciprocating screw 1021 and a guide crescent pin 1022 . The two transmission rods are an integrated structure, and the two transmission rods are respectively the left half and the right half of the reciprocating screw 1021 .

[0060] The two pistons 1033 are respectively arranged at the two ends of the reciprocating screw. When the manual crank 101 rotates, the reciprocating screw 1021 drives the two pistons to reciprocate in the syringe.

[0061] Specifically, the transmission member includes a driving gear 1023 and a driven gear 1024 .

[0062] The driving gear 1023 is connected to the manual crank 101 , and the guide crescent pin 1022 is disposed in the driven gear 1024 .

[0063] The reciprocating screw passes through the middle hole of the driven gear and is connected with the guide crescent pin.

[0064] When the manual crank 101 rotates, the driven gear 1024 is driven to rotate via the driving gear 1023 .

[0065] The guide crescent pin 1022 drives the reciprocating screw to reciprocate along the screw axis when the driven gear 1024 rotates.

[0066] The driving gear and the driven gear are compound staggered-axis helical gears, and the driven gear includes a left gear plate 10241 and a right gear plate 10242 .

[0067] A crescent pin installation cavity 10243 for guiding the crescent pin 1022 is provided between the left gear plate 10241 and the right gear plate 10242 .

[0068] A rotating shaft 10221 is provided at the top of the guide crescent pin 1022 .

[0069] A rotating shaft mounting groove matching the rotating shaft 10221 is provided at the top of the crescent pin mounting cavity.

[0070] The reciprocating mechanism includes a gear box 107 fixed to the housing, and the gear box 107 includes a left mounting portion 1071 and a right mounting portion 1072 .

[0071] The gear box is provided with a gear mounting cavity for a driving gear and a driven gear.

[0072] The driving gear and the driven gear are installed in the gear installation cavity through the shaft sleeve 1073.

[0073] The middle hole of the moving gear matches the shape and position of the middle hole 1074 of the gear box.

[0074] A pipeline connection device 108 is disposed on the top of the gear box 107 , and the pipeline connection device includes a mounting base 1081 , a left branch 1082 , and a right branch 1083 .

[0075] The mounting base is mounted on the top of the gear box.

[0076] The left branch 1082 and the right branch 1083 are connected in the mounting base.

[0077] The left branch includes a water outlet confluence port 1084 and a device liquid outlet 106 connected to the water outlet confluence port, and the right branch includes another water outlet confluence port 1084 .

[0078] The two water outlet confluence ports are connected to the two injection water outlets 1032 respectively.

[0079] A water inlet branch is fixed on the outside of the right branch, and the water inlet branch is not connected with the water outlet confluence port.

[0080] The water inlet branch includes a device liquid inlet 105 and two water inlet diversion ports 1085 connected to the device liquid inlet 105 .

[0081] The two water inlet diversion ports 1085 are connected to the two injection water inlets 1031 respectively.

[0082] A connection port for a pressure gauge 1086 which is in communication with the water outlet confluence port 1084 is provided on the top of the pipeline connection device.

[0083] The side surface of the reciprocating screw 1021 includes a concave arc surface structure 1025 .

[0084] The shapes of the middle hole of the moving gear and the middle hole of the gear box match the cross-section of the reciprocating screw.

[0085] The working principle of the priming pump is as follows:

[0086] 1. The main body of the product is two piston injection devices installed on both sides of the gear box in opposite directions. The two pistons are installed at both ends of a reciprocating screw.

[0087] 2. There are two water inlets and outlets at the end of the injection barrel at both ends.

[0088] 3. Turn the driving gear through the handwheel crank, and drive the driven gear through the driving gear.

[0089] 4. A guide crescent pin for driving a reciprocating lead screw is provided in the driven gear. The crescent part of the guide crescent pin slides relatively in the trapezoidal thread groove of the lead screw. Once the end of the thread reaches the crescent pin position, the crescent pin will switch direction under the guidance of the V-shaped groove at the end of the thread groove, thereby causing the lead screw to move in the opposite direction.

[0090] 5. The water inlet and outlet of the two syringes are connected to two one-way valves respectively. The two one-way valves are in opposite directions, one in and one out, so that water can only flow in and out in one direction.

[0091] 6. The water inlet and outlet pipes of the two live injection cylinders can be connected to the water inlet and outlet pipes of the pump through a tee respectively.

[0092] 7. The tee of the water outlet pipe can be connected to a pressure gauge to monitor the water outlet pressure.

[0093] 8. When the piston at one end moves toward the end of the syringe barrel (pushing water outward), due to the action of the one-way valve, the water inlet at this end is passively closed due to the positive pressure, and water can only flow to the outside through the tee along the water outlet; at the same time, the water outlet of the injection at the other end is passively closed due to the negative pressure, and water can only be sucked in from the water inlet.

[0094] 9. Through the above mechanism, no matter which direction the hand wheel is shaken, the reciprocating screw will always move in a straight line, and no matter the direction of movement of the screw, the two syringes will always have one end absorbing water and the other end discharging water, thus achieving a continuous and stable perfusion function.

[0095] The advantages of this embodiment are:

[0096] 1. Gear design saves doctors' energy and does not affect the operation.

[0097] 2. The piston design allows for continuous water inflow and outflow, and has the function of a "pump", which allows for uninterrupted water injection throughout the entire process to ensure a clear surgical field of view.

[0098] 3. Manual rotation can dynamically adjust the perfusion volume and perfusion pressure in time according to the intraoperative situation to ensure the safety of the operation.

[0099] 4. Disposable, safe, cost-saving, and does not affect multiple surgeries at the same time.

[0100] 5. A pressure gauge is provided to monitor the perfusion pressure and renal pelvic pressure in real time. During perfusion, the perfusion pressure can be known. When the perfusion is suspended, the water outlet of the device is the same as the renal pelvis through the endoscope instrument channel, and the renal pelvic pressure can be measured to ensure the safety of the operation and prevent the occurrence of urinary sepsis.

[0101] Example 2

[0102] See also Fig. 9 This embodiment is basically the same as Embodiment 1, except that:

[0103] The reciprocating mechanism includes a rounded rectangular internal gear 200 and a broken gear 201. The broken gear 201 is connected to the manual crank. The broken gear is arranged inside the internal gear and drives the broken gear to perform reciprocating motion. The transmission rod 202 is arranged at both ends of the internal gear.

[0104] Example 3

[0105] See also Fig.10 This embodiment is basically the same as Embodiment 1, except that:

[0106] The reciprocating mechanism includes a sprocket 300 and a chain 301 matched with the sprocket. The length of the chain 301 is smaller than the circumference of the outer teeth of the sprocket. The transmission rod 302 is arranged at both ends of the chain. The sprocket is connected to the manual crank, and the sprocket drives the incomplete gear to reciprocate.

[0107] Example 4

[0108] See also Fig.11 This embodiment is basically the same as Embodiment 1, except that:

[0109] The reciprocating mechanism includes a first sub-mechanism and a second sub-mechanism, the first sub-mechanism includes a connecting rod 400 and a central axis 401 arranged in the middle of the connecting rod, the transmission rod 402 is arranged at both ends of the connecting rod, and the transmission rod 402 is arranged on the same side of the connecting rod, and the second sub-mechanism 404 is connected to one end of the connecting rod and drives the connecting rod to reciprocate through the rotation of a manual crank (manual crank connection position 403).

[0110] By utilizing the reciprocating mechanism, the piston-type injection devices can be arranged in the same direction, instead of being necessarily kept on the same straight line and arranged in opposite directions.

[0111] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A handheld continuous infusion device, characterized in that: The handheld continuous infusion device comprises a housing, a manual crank, a reciprocating mechanism, at least two piston injection devices, at least four one-way valves, a device liquid inlet and a device liquid outlet; Each piston-type injection device comprises an injection water inlet, an injection water outlet, a piston and an injection barrel, and the injection water inlet and injection water outlet of the same piston-type injection device are both arranged at the front end of the injection barrel; The reciprocating mechanism includes two transmission rods and a transmission member, two pistons are respectively arranged at the top ends of the two transmission rods, the transmission rod with the piston is arranged in the injection cylinder, and the transmission member is connected to the manual crank; When the manual crank is rotated, the two pistons are driven to reciprocate in the injection cylinder through the reciprocating mechanism; Each injection water inlet is connected to the device liquid inlet through a one-way valve, and the one-way valve between the injection water inlet and the device liquid inlet conducts the fluid from the device liquid inlet to the injection water inlet. Each injection water outlet is connected to the device liquid outlet through a one-way valve, and the one-way valve between the injection water outlet and the device liquid outlet conducts the fluid from the injection water outlet to the device liquid outlet.

2. The handheld continuous perfusion device according to claim 1, characterized in that: The reciprocating mechanism includes a reciprocating screw and a guide crescent pin. The two transmission rods are an integrated structure. The two transmission rods are the left half and the right half of the reciprocating screw respectively. The two pistons are respectively arranged at the two ends of the reciprocating screw. When the manual crank is rotated, the reciprocating screw drives the two pistons to reciprocate in the injection cylinder respectively.

3. The handheld continuous perfusion device according to claim 2, characterized in that: The transmission member includes a driving gear and a driven gear, the driving gear is connected to the manual crank, the guide crescent pin is arranged in the driven gear, the reciprocating screw passes through the middle hole of the driven gear and is connected to the guide crescent pin, when the manual crank rotates, the driven gear is driven to rotate through the driving gear, and the guide crescent pin drives the reciprocating screw to reciprocate along the screw axis when the driven gear rotates.

4. The handheld continuous perfusion device according to claim 3, characterized in that: The driving gear and the driven gear are compound staggered axis bevel gears, the driven gear includes a left gear plate and a right gear plate, a crescent pin installation cavity of the guide crescent pin is provided between the left gear plate and the right gear plate, a rotating shaft is provided at the top end of the guide crescent pin, and a rotating shaft installation groove matching the rotating shaft is provided at the top of the crescent pin installation cavity.

5. The handheld continuous perfusion device according to claim 4, characterized in that: The reciprocating mechanism includes a gear box fixed to the housing, the gear box includes a left mounting portion and a right mounting portion, a gear mounting cavity for a driving gear and a driven gear is provided in the gear box, the driving gear and the driven gear are mounted in the gear mounting cavity through a shaft sleeve, and the middle hole position of the driven gear matches the shape and position of the middle hole position of the gear box.

6. The handheld continuous perfusion device according to claim 5, characterized in that: A pipeline connecting device is provided on the top of the gear box, and the pipeline connecting device includes a mounting base, a left branch and a right branch. The mounting base is installed on the top of the gear box, and the left branch and the right branch are connected in the mounting base. The left branch includes a water outlet confluence and a device liquid outlet connected to the water outlet confluence, and the right branch includes another water outlet confluence, and the two water outlet confluences are respectively connected to two injection water outlets. A water inlet branch is fixed on the outside of the right branch, and the water inlet branch includes a device liquid inlet and two water inlet shunts connected to the device liquid inlet, and the two water inlet shunts are respectively connected to two injection water inlets. A pressure gauge connecting port connected to the water outlet confluence is provided on the top of the pipeline connecting device.

7. The handheld continuous perfusion device according to claim 5, characterized in that: The side surface of the reciprocating screw includes a concave arc surface structure, and the shapes of the middle hole of the movable gear and the middle hole of the gear box match the cross section of the reciprocating screw.

8. The handheld continuous perfusion device according to claim 1, characterized in that: The reciprocating mechanism comprises a rounded rectangular internal gear and a broken gear, the broken gear is connected to the manual crank, the broken gear is arranged inside the internal gear and drives the broken gear to reciprocate, and the transmission rod is arranged at both ends of the internal gear; or, The reciprocating mechanism includes a sprocket and a chain matched with the sprocket, the length of the chain is less than the circumference of the outer teeth of the sprocket, the transmission rod is arranged at both ends of the chain, the sprocket is connected to the manual crank, and the sprocket drives the incomplete gear to reciprocate.

9. The handheld continuous perfusion device according to claim 1, characterized in that: The reciprocating mechanism includes a first sub-mechanism and a second sub-mechanism, the first sub-mechanism includes a connecting rod and a central axis arranged in the middle of the connecting rod, the transmission rod is arranged at both ends of the connecting rod, and the transmission rod is arranged on the same side of the connecting rod, and the second sub-mechanism is connected to one end of the connecting rod and drives the connecting rod to reciprocate by rotating a manual crank.

10. A multifunctional sheath system for ureteroscope, characterized in that: The multifunctional sheath system of the ureteroscope comprises a handheld continuous perfusion device as described in any one of claims 1 to 9 and a multifunctional sheath of the ureteroscope, wherein the multifunctional sheath of the ureteroscope comprises an outer sheath and a sheath core, the outer sheath comprises an outer sheath water inlet, and the handheld continuous perfusion device is connected to the outer sheath water inlet.

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