Handheld continuous perfusion device and flexible ureteroscope multifunctional sheath system

Abstract

The utility model discloses a handheld continuous perfusion device and a flexible ureteroscope multifunctional sheath system. The handheld continuous perfusion device comprises a shell, a manual rocking handle, a reciprocating lead screw, a piston type injection device, a one-way valve, a device liquid inlet and a device liquid outlet. The piston type injection device comprises two water inlets and outlets, two pistons and two injection barrels, the two injection barrels are arranged on the same straight line, the two water inlets and outlets are oppositely arranged, one piston is arranged in each injection barrel, and the two pistons are connected with each other; the two water inlets and outlets are respectively connected with the device liquid inlet through a one-way valve and are respectively connected with the device liquid outlet through a one-way valve; and when the manual rocking handle rotates, the two pistons are driven by the reciprocating lead screw to reciprocate in the syringe respectively. Water can be fed and discharged continuously, the perfusion amount and the perfusion pressure can be dynamically adjusted in time in the operation, the perfusion pressure and the pelvis pressure are monitored in real time, and the operation safety is improved.

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 require 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 tract stones are common and frequently occurring diseases, a hospital often has 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 infusion device, characterized in that the handheld continuous infusion device comprises a housing, a manual crank, a reciprocating mechanism, a piston injection device, at least four one-way valves, a device liquid inlet and a device liquid outlet;

[0010] The piston injection device comprises two water inlets and outlets, two pistons and two injection barrels, the two water inlets and outlets are arranged oppositely, each injection barrel is provided with a piston, and the two pistons are connected to each other through a reciprocating mechanism;

[0011] The two water inlets and outlets are respectively connected to the liquid inlet of the device through a one-way valve, and the one-way valve between the water inlet and outlet and the liquid inlet of the device conducts the fluid from the liquid inlet of the device to the water inlet and outlet. The two water inlets and outlets are respectively connected to the liquid outlet of the device through a one-way valve, and the one-way valve between the water inlet and outlet and the liquid outlet of the device conducts the fluid from the water inlet and outlet to the liquid outlet of the device.

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

[0013] Preferably, the reciprocating mechanism includes a reciprocating screw and a guide crescent pin, and when the manual crank is rotated, the reciprocating screw drives the two pistons to reciprocate in the injection cylinder respectively.

[0014] Preferably, the handheld continuous perfusion device includes a worm wheel and a worm, the manual crank is connected to the worm, two pistons are connected by a reciprocating screw, the two pistons are respectively arranged at both ends of the reciprocating screw, the worm wheel is sleeved on the reciprocating screw, and a guide crescent pin with variable direction is embedded in the turbine, and the guide crescent pin drives the reciprocating screw to reciprocate along the axis of the screw when the worm wheel rotates.

[0015] Preferably, the reciprocating screw is provided with a guide groove parallel to the screw axis, and the injection barrel is provided with a guide protrusion matching the guide groove.

[0016] Preferably, the liquid inlet of the device is arranged at the bottom of the shell, and the liquid inlet of the device is connected to the first branch and the second branch through a tee. The first branch is installed along the bottom of the shell and connected to the left water inlet and outlet, and the second branch is installed along the bottom of the shell and connected to the right water inlet and outlet.

[0017] Preferably, the left water inlet and outlet are also connected to a third branch, and the right water inlet and outlet are also connected to a fourth branch. The third branch and the fourth branch are both installed along the top of the shell, and the third branch and the fourth branch are both connected to the liquid outlet of the device.

[0018] Preferably, a hollow area is provided on the housing at a position between the reciprocating screw and the first branch and at a position between the reciprocating screw and the third branch.

[0019] Preferably, a pressure gauge is provided on the liquid outlet of the device.

[0020] Preferably, the manual crank is connected to a reciprocating screw, a guide crescent pin is provided on one side of the reciprocating screw, the two pistons are connected by a connecting rod, the two pistons are respectively provided at both ends of the connecting rod, the guide crescent pin is fixedly connected to the connecting rod, and the reciprocating screw drives the guide crescent pin to reciprocate.

[0021] The utility model also provides a ureteroscope multifunctional sheath system, which is characterized in that the ureteroscope multifunctional sheath system comprises the handheld continuous perfusion device and the ureteroscope multifunctional sheath as described above.

[0022] Preferably, 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.

[0023] 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.

[0024] The positive and progressive effects of the utility model are:

[0025] Continuous water inflow and outflow facilitates timely dynamic adjustment of perfusion volume and perfusion pressure during surgery, and real-time monitoring of perfusion pressure and renal pelvic pressure improves surgical safety.

[0026] Specifically, the advantages of the present invention are:

[0027] 1. Wheel design saves doctors' energy and does not affect the operation.

[0028] 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.

[0029] 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.

[0030] 4. Disposable, safe, cost-saving, and does not affect multiple surgeries at the same time.

[0031] 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

[0032] Figure 1 This is a schematic structural diagram of a handheld continuous perfusion device according to Example 1 of the utility model.

[0033] Figure 2 This is another structural schematic diagram of the handheld continuous perfusion device of Example 1 of the utility model.

[0034] Figure 3 This is a schematic structural diagram of the reciprocating screw of Example 1 of the utility model.

[0035] Figure 4 This is a schematic structural diagram of the guide crescent pin of Example 1 of the utility model.

[0036] Figure 5 This is a schematic structural diagram of a handheld continuous perfusion device according to Example 2 of the utility model.

[0037] Figure numerals: 101, housing; 102, manual crank; 103, reciprocating screw; 104, piston injection device; 105, one-way valve; 106, device liquid inlet; 107, device liquid outlet; 108, water inlet and outlet; 109, piston; 110, syringe barrel; 111, worm gear; 112, worm; 113, guide crescent pin; 114, first branch; 115, second branch; 116, third branch; 117, fourth branch; 118, hollow area; 119, pressure gauge; 201, manual crank; 202, reciprocating screw; 203, guide crescent pin; 204, piston; 205, connecting rod. DETAILED DESCRIPTION

[0038] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments. Example 1

[0039] 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.

[0040] 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.

[0041] 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.

[0042] See also Figures 1 to 4 The handheld continuous perfusion device includes a housing 101, a manual crank 102, a reciprocating mechanism (the reciprocating mechanism in this embodiment includes a reciprocating screw 103 and a guide crescent pin 113), a piston injection device 104, at least four one-way valves 105, a device liquid inlet 106 and a device liquid outlet 107.

[0043] The piston injection device includes two water inlets and outlets 108 , two pistons 109 and two injection cylinders 110 .

[0044] The two injection cylinders 110 are arranged on the same straight line and the two water inlets and outlets are arranged oppositely. The opposite arrangement of the water inlets and outlets means that the water discharge directions are opposite, or the water inlet directions are opposite.

[0045] Each injection cylinder is provided with a piston, and the two pistons are connected to each other through a reciprocating screw. In this embodiment, the two piston heads are connected through a reciprocating screw.

[0046] The two water inlets and outlets are respectively connected to the liquid inlet of the device through a one-way valve.

[0047] The one-way valve between the water inlet and outlet and the liquid inlet of the device conducts the fluid from the liquid inlet of the device to the water inlet and outlet.

[0048] The two water inlets and outlets are respectively connected to the liquid outlet of the device through a one-way valve.

[0049] The one-way valve between the water inlet and outlet and the liquid outlet of the device conducts the fluid from the water inlet and outlet to the liquid outlet of the device.

[0050] When the manual crank is rotated, the reciprocating screw drives the two pistons to reciprocate in the injection cylinder respectively.

[0051] The reciprocating mechanism comprises a reciprocating screw and a guide crescent pin. When the manual crank is rotated, the reciprocating screw drives the two pistons to reciprocate in the injection cylinder respectively.

[0052] Specifically, the handheld continuous perfusion device includes a worm gear 111 and a worm 112 .

[0053] The manual crank 102 is connected to the worm 112 .

[0054] The two pistons are connected by a reciprocating screw.

[0055] Two pistons are respectively arranged at two ends of the reciprocating screw.

[0056] The worm gear is sleeved on the reciprocating screw.

[0057] A guide crescent pin 113 with variable direction is embedded in the turbine.

[0058] The guide crescent pin drives the reciprocating screw to reciprocate along the screw axis when the worm wheel rotates.

[0059] The reciprocating screw is provided with a guide groove parallel to the screw axis, which can ensure that the reciprocating screw does not rotate, and has a better effect than using only the friction provided by the piston.

[0060] A guide protrusion matching the guide groove is arranged in the injection barrel.

[0061] The liquid inlet of the device is arranged at the bottom of the shell.

[0062] The liquid inlet of the device is connected to the first branch 114 and the second branch 115 through a tee.

[0063] The first branch is installed along the bottom of the shell and connected to the left water inlet and outlet.

[0064] The second branch is installed along the bottom of the shell and connected to the right water inlet and outlet.

[0065] The left water inlet and outlet are also connected to a third branch 116 .

[0066] The right water inlet and outlet are also connected to a fourth branch 117 .

[0067] The third branch and the fourth branch are both installed along the top of the shell.

[0068] The third branch and the fourth branch are both connected to the liquid outlet of the device.

[0069] The housing is provided with hollow areas 118 at positions between the reciprocating screw and the first branch and between the reciprocating screw and the third branch. The hollow areas can not only save material costs but also facilitate the gripping and use by users and doctors.

[0070] A pressure gauge 119 is provided on the liquid outlet of the device.

[0071] The working principle of the priming pump is as follows:

[0072] 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.

[0073] 2. There are two water inlets and outlets at the end of the injection barrel at both ends.

[0074] 3. Turn the screw through the handwheel handle, and drive the worm wheel through the worm.

[0075] 4. The worm gear is connected to a guide crescent pin for driving a reciprocating lead screw. 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 switches 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.

[0076] 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.

[0077] 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.

[0078] 7. The tee of the water outlet pipe can be connected to a pressure gauge to monitor the water outlet pressure.

[0079] 8. When the piston at one end moves toward the end of the syringe (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.

[0080] 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.

[0081] The advantages of this embodiment are:

[0082] 1. Wheel design saves doctors' energy and does not affect the operation.

[0083] 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.

[0084] 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.

[0085] 4. Disposable, safe, cost-saving, and does not affect multiple surgeries at the same time.

[0086] 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. Example 2

[0087] This embodiment is basically the same as Embodiment 1, except that:

[0088] See also Figure 5 The manual crank 201 is connected to the reciprocating screw 202, a guide crescent pin 203 is provided on one side of the reciprocating screw 202, two pistons 204 are connected by a connecting rod 205, and the two pistons 204 are respectively provided at both ends of the connecting rod 205. The guide crescent pin 203 is fixedly connected to the connecting rod 205, and the reciprocating screw 202 drives the guide crescent pin to reciprocate.

[0089] 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 can 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, a piston injection device, at least four one-way valves, a device liquid inlet and a device liquid outlet; The piston injection device comprises two water inlets and outlets, two pistons and two injection barrels, the two water inlets and outlets are arranged oppositely, each injection barrel is provided with a piston, and the two pistons are connected to each other through a reciprocating mechanism; The two water inlets and outlets are respectively connected to the liquid inlet of the device through a one-way valve, and the one-way valve between the water inlet and outlet and the liquid inlet of the device conducts the fluid from the liquid inlet of the device to the water inlet and outlet. The two water inlets and outlets are respectively connected to the liquid outlet of the device through a one-way valve, and the one-way valve between the water inlet and outlet and the liquid outlet of the device conducts the fluid from the water inlet and outlet to the liquid outlet of the device. When the manual crank is rotated, the two pistons are driven to reciprocate in the injection cylinder through the reciprocating mechanism.

2. The handheld continuous perfusion device according to claim 1, characterized in that: The reciprocating mechanism comprises a reciprocating screw and a guide crescent pin. 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 handheld continuous perfusion device includes a worm wheel and a worm, the manual crank is connected to the worm, two pistons are connected by a reciprocating screw, the two pistons are respectively arranged at the two ends of the reciprocating screw, the worm wheel is sleeved on the reciprocating screw, and a guide crescent pin with variable direction is embedded in the turbine. When the guide crescent pin rotates with the worm wheel, it drives the reciprocating screw to reciprocate along the axis of the screw.

4. The handheld continuous perfusion device according to claim 3, characterized in that: The reciprocating screw is provided with a guide groove parallel to the screw axis, and the injection cylinder is provided with a guide protrusion matching the guide groove.

5. The handheld continuous perfusion device according to claim 3, characterized in that: The liquid inlet of the device is arranged at the bottom of the shell, and the liquid inlet of the device is connected to the first branch and the second branch through a tee. The first branch is installed along the bottom of the shell and connected to the left water inlet and outlet, and the second branch is installed along the bottom of the shell and connected to the right water inlet and outlet.

6. The handheld continuous perfusion device according to claim 5, characterized in that: The left water inlet and outlet are also connected to a third branch, and the right water inlet and outlet are also connected to a fourth branch. The third branch and the fourth branch are both installed along the top of the shell, and the third branch and the fourth branch are both connected to the liquid outlet of the device.

7. The handheld continuous perfusion device according to claim 2, characterized in that: The manual crank is connected to the reciprocating screw, a guide crescent pin is provided on one side of the reciprocating screw, the two pistons are connected by a connecting rod, the two pistons are respectively provided at both ends of the connecting rod, the guide crescent pin is fixedly connected to the connecting rod, and the reciprocating screw drives the guide crescent pin to reciprocate.

8. The handheld continuous perfusion device according to any one of claims 1 to 7, characterized in that: The shell is provided with a hollow area; and / or, A pressure gauge is arranged on the liquid outlet of the device.

9. A multifunctional sheath system for ureteroscope, characterized in that: The multifunctional sheath system for a flexible ureteroscope comprises a handheld continuous perfusion device as described in any one of claims 1 to 8 and a multifunctional sheath for a flexible ureteroscope.

10. The multifunctional sheath system for flexible ureteroscope according to claim 9, characterized in that: 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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