Ureteral pyeloscope system and use method thereof

Abstract

The invention provides a ureter pyeloscope system. Comprising a flexible ureteroscope and a pressure control host, the flexible ureteroscope comprises an insertion tube and a handle portion, a camera, a light source lamp and a pressure measuring sensor are arranged at the front end of the insertion tube, an instrument channel and a calculus removing channel are arranged in the insertion tube, and an instrument leading-in opening and a first water injection connector are formed in the rear portion of the instrument channel. The pressure control host comprises a control circuit, a water inlet pipeline, a water outlet pipeline and a first peristaltic pump, the control circuit receives a pressure signal monitored by the pressure measuring sensor, and the control circuit sends a control signal to the first peristaltic pump; the first water injection connector is communicated with a water source through a water inlet pipeline, a rear port of the calculus removing channel is communicated with an external negative pressure source through a water outlet pipeline, and the first peristaltic pump is installed on the water outlet pipeline. The optical fiber of the holmium laser treatment equipment reaches the front end of the flexible ureteroscope through the instrument channel for lithotripsy, and during lithotripsy, the lithotripsy is discharged through the lithotripsy discharging channel along with drainage, so that the operation time is greatly shortened, and lithotripsy is cleared in a visible state, so that lithotripsy is more thorough. The invention further provides a using method of the ureter pyeloscope system.

Description

Technical Field

[0001] The present invention belongs to the medical device industry and relates to a urology kidney stone removal surgical instrument, and in particular to a ureteroscope device for performing functions such as lithotripsy, stone removal, and pressure measurement in the renal pelvis.

[0002] The present invention also relates to a method for using the ureteropyeloscope system. Background Art

[0003] In the current surgery using ureteroscope to treat kidney stones, a ureteral sheath with an inner diameter of 4mm is first used to establish a channel to the kidney through the natural cavity of the human body. A ureteroscope with an outer diameter of 3mm is inserted into the renal pelvis through this channel. There is a camera at the front end of the insertion tube, an instrument channel with an inner diameter of 1.2mm inside the insertion tube, and a controllable bending mechanism at the front end of the insertion tube. During the operation, the operator uses the front end camera to search for stones. The holmium laser fiber enters the renal pelvis through the instrument channel and the laser energy breaks up the stones. The broken large stones (2mm-4mm) are removed by the stone removal basket. Stones smaller than 2mm are naturally excreted by the human body after the operation.

[0004] Currently, there are two major disadvantages to treating kidney stones through ureteroscopy: 1. The surgical process requires continuous water supply through the instrument channel to fill the renal pelvis space with water, maintain a clear field of view at the front of the camera, and remove the heat generated by the holmium laser lithotripsy. However, if the drainage is not smooth, the pressure in the renal pelvis will easily increase. When the water pressure in the renal pelvis is too high, reverse infiltration of the renal mucosa will occur, causing infection; 2. The stones are not cleaned up after lithotripsy, and the patient needs 2-3 months for natural excretion, which will also leave hidden dangers for the recurrence of stones.

[0005] There is also a method of removing stones by measuring the pressure of the ureteral sheath in the prior art. Specifically, a pressure measuring channel is led out from the front end of the ureteral sheath and connected to an external pressure sensing device to realize pressure monitoring. A suction channel and an endoscope channel are established at the rear end of the ureteral sheath. The stones are crushed through the ureteroscope. The stone removal process is to flush the stones in the renal pelvis to the front end of the ureteral sheath through the water discharged from the front end of the endoscope. The stones are then drawn out from the ureteral sheath by repeatedly pulling the endoscope back and forth. The disadvantage is that the pressure sensor is not in the renal pelvis, but on an external device, so the measured pressure value is inaccurate. The stone removal process requires flushing the stones to the front end of the ureteral sheath, and then withdrawing the endoscope to suck out the stones through negative pressure suction. The process is cumbersome and repetitive, and the efficiency is low. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a ureteropyeloscope system with reasonable structure and convenient use.

[0007] The technical problem to be solved by the present invention is to provide a method for using the ureteropyeloscope system.

[0008] In order to solve the above technical problems, the present invention provides a ureteropyeloscope system;

[0009] Includes ureteroscope and pressure control host;

[0010] The flexible ureteroscope includes a front insertion tube and a rear handle. The front end of the insertion tube is inserted into the renal pelvis of the patient's kidney. The front end of the insertion tube is equipped with a camera, a light source, and a pressure sensor. The insertion tube is provided with an instrument channel and a stone discharge channel. The front end of the instrument channel extends to the front end surface of the insertion tube. The rear end of the instrument channel is provided with an instrument introduction port and a first water injection port. An optical fiber runs through the instrument channel from the instrument introduction port. The front end of the stone discharge channel also extends to the front end surface of the insertion tube.

[0011] The pressure control host includes a control circuit, a water inlet pipe, a water outlet pipe and a first peristaltic pump. The pressure sensor is electrically connected to the control circuit of the pressure control host through a wire passing through the insertion tube. The control circuit receives the pressure signal monitored by the pressure sensor, and the control circuit sends a control signal to the first peristaltic pump. The first water injection interface at the rear of the instrument channel of the ureteroscope is connected to the water source through the water inlet pipe. The water outlet pipe of the pressure control host is connected to the stone discharge channel of the ureteroscope, and the first peristaltic pump is installed on the water outlet pipe.

[0012] As a preferred embodiment of the present ureteropyeloscopic system, the present ureteropyeloscopic system further comprises a sheath assembly, which comprises a ureteral sheath tube and a ureteral sheath rear seat. The rear end of the ureteral sheath tube and the ureteral sheath rear seat are fixed. The insertion tube of the ureteroscope passes through the ureteral sheath rear seat and extends out of the front end face of the ureteral sheath tube. The outer diameter of the insertion tube of the ureteroscope is smaller than the inner diameter of the ureteral sheath tube. A gap for water injection is formed between the outer wall of the insertion tube and the inner wall of the ureteral sheath tube. A second water injection interface communicating with the interior of the ureteral sheath rear seat is provided on the ureteral sheath rear seat. The second water injection interface is connected to the water inlet pipeline. The gap between the cavity of the ureteral sheath rear seat and the outer wall of the insertion tube and the inner wall of the ureteral sheath tube constitutes a channel for water injection.

[0013] As a preferred embodiment of the present ureteropyeloscopic system, the outer diameter of the insertion tube of the flexible ureteroscope is 3.60-3.80 mm, the aperture of the stone discharge channel is 2.0-2.2 mm, and the aperture of the instrument channel is 0.5-0.8 mm.

[0014] After adopting such a structure, a camera device and a micro pressure sensor are installed at the front end of the insertion tube of the ureteroscope. The insertion tube has two channels: a stone discharge channel and an instrument channel. During the operation, water is injected into the renal pelvis through the instrument channel and the channel between the insertion tube and the ureteral sheath respectively. The return water passes through the stone discharge channel of the insertion tube. The first water injection interface of the instrument channel and the second water injection interface of the ureteral sheath are connected to the water inlet pipeline of the pressure control host, and the water outlet pipeline of the pressure control host is connected to the stone discharge channel of the ureteroscope.

[0015] During lithotripsy, water injection and drainage are continuous. The optical fiber of the holmium laser treatment device passes through the instrument channel to the front end of the ureteroscope to crush the stones. While crushing the stones, stones smaller than 2 mm are discharged through the stone removal channel along with the drainage. The lithotripsy and stone removal operations are carried out under visual conditions. Since the lithotripsy and stone removal are carried out at the same time, the operation time is greatly shortened. At the same time, stone removal under visual conditions makes the stone removal more thorough.

[0016] During the above-mentioned operation, the control circuit receives the pressure signal monitored by the pressure sensor, processes and calculates the control circuit and controls the first peristaltic pump signal, thereby monitoring the water injection pressure monitoring and negative pressure suction control system in the renal pelvis to achieve liquid pressure balance in the renal pelvis.

[0017] As a preferred embodiment of the present ureteropyeloscopy system, the pressure control host further includes an image display module, and the real-time image signal captured by the camera of the ureteroscope is transmitted to the image display module. The light source lamp of the ureteroscope is electrically connected to the control circuit of the pressure control host through a wire passing through the insertion tube.

[0018] As a preferred embodiment of the ureteropyeloscopy system, the pressure control host is further provided with a pressure display module, which is connected to the control circuit. The pressure display module displays the pressure inside the renal pelvis of the patient's kidney monitored by the pressure sensor of the ureteroscope.

[0019] With such a structure, the pressure display module can display the fluid pressure in the renal pelvis in real time and intuitively.

[0020] As a preferred embodiment of the ureteropyeloscopy system, the water source connected to the water inlet pipe is a gravity water injection structure, which is provided with a water storage bag. The water storage bag is connected to the inlet of the water inlet pipe, and the horizontal height of the bottom of the water storage bag is higher than the horizontal height of the front end of the insertion tube of the ureteroscope.

[0021] As a preferred embodiment of the ureteropyeloscope system, the height difference between the bottom of the water storage bag and the front end of the insertion tube of the ureteroscope is 0.8-1.2 m.

[0022] When the pressure sensor of the ureteroscope fails, the pressure control host cannot obtain the accurate fluid pressure in the renal pelvis. If a water pump or other direct water source is used to increase the pressure, the fluid pressure in the patient's renal pelvis will be too high, forcing the toxins in the renal pelvis to reverse osmosis. Long-term high pressure in the renal pelvis will also cause damage to the kidneys.

[0023] After adopting such a structure, the gravity water injection structure uses the height difference between the water storage bag and the ureteroscope to pressurize the injected water or liquid medicine. Moreover, the gravity water injection structure is limited to the height difference of 0.8-1.2m, which also limits the inlet water pressure of the water inlet pipeline. Even if the pressure sensor of the ureteroscope fails, it will not cause toxin back-osmosis in the renal pelvis and kidney damage.

[0024] As a preferred embodiment of the ureteropyeloscopy system, the pressure control host also includes a second peristaltic pump, the starting end of the water inlet pipe is connected to the water source, and the second peristaltic pump is arranged on the water inlet pipe; after adopting such a structure, water is transported to the water inlet pipe through the second peristaltic pump.

[0025] As a preferred embodiment of the ureteropyeloscopic system, the front end portion of the insertion tube is provided with two LED light sources, and the two LED light sources are located on both sides of the camera.

[0026] In order to solve the above technical problems, the present invention provides a method for using a ureteropyeloscope system, comprising:

[0027] Continuous water injection into the renal pelvis through the instrument channel and the channel between the insertion tube and the ureteral sheath; and

[0028] At the same time, the return water is allowed to pass through the stone discharge channel of the inserted tube and discharged through the water outlet pipe of the pressure control host. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of the first embodiment of the ureteropyeloscope system.

[0030] Figure 2 This is a schematic structural diagram of the ureteroscope and sheath assembly in the first embodiment of the ureteropyeloscope system.

[0031] Figure 3 yes Figure 2 Section view along AA.

[0032] Figure 4 yes Figure 2 Cross-sectional view along BB.

[0033] Figure 5 This is a schematic diagram of the fluid circuit of the first embodiment of the ureteropyeloscopy system.

[0034] Figure 6 This is a schematic diagram of the fluid path of the second embodiment of the ureteropyeloscopy system. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only implementations.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Example 1

[0039] See also Figures 1 to 5 .

[0040] The ureteropyeloscope system includes a flexible ureteroscope 1, a sheath assembly and a pressure control host 2.

[0041] The ureteroscope 1 includes an insertion tube 11 at the front and a handle 15 at the rear. The rear of the insertion tube 11 is fixed to the handle 15. The front end of the insertion tube 11 of the ureteroscope 1 is inserted into the renal pelvis of the patient's kidney. The front end of the insertion tube 11 is provided with a camera 12, a light source lamp 13 and a pressure sensor 14. The insertion tube 11 is provided with at least an optical fiber tube body 11a, a cable tube body 11b, an instrument tube body and a stone removal device tube. The front end of the wire passes through the cable tube body 11b and the camera 12, the light source lamp 13 and the pressure sensor 14. 13 is connected to the pressure sensor 14, the inner hole of the instrument tube body of the insertion tube 11 is the instrument channel 11c, the front section of the instrument channel 11c extends to the front end surface of the insertion tube 11, and the rear portion of the instrument tube body is respectively provided with an instrument introduction port 11d and a first water injection port 11e. The optical fiber of the holmium laser treatment device passes through the instrument channel 11c from the instrument introduction port 11d, the inner hole of the stone removal tube body of the insertion tube 11 is the stone removal channel 11f, and the front section of the stone removal channel 11f also extends to the front end surface of the insertion tube 11.

[0042] The outer diameter of the insertion tube 11 of the flexible ureteroscope 1 is 3.60 mm, the aperture of the stone discharge channel 11 f is 2.0 mm, and the aperture of the instrument channel 11 c is 0.6 mm.

[0043] Two LED light sources 13 are provided at the front end of the insertion tube 11 , and the two LED light sources 13 are located on both sides of the camera 12 .

[0044] The sheath assembly includes a ureteral sheath tube 31 and a ureteral sheath rear seat 32. The rear end of the ureteral sheath tube 31 and the ureteral sheath rear seat 32 are fixed. The insertion tube 11 of the ureteroscope 1 passes through the ureteral sheath rear seat 32 and extends out of the front end face of the ureteral sheath tube 31. A sealing ring is provided between the insertion tube 11 and the side wall of the ureteral sheath rear seat 32. The outer diameter of the insertion tube 11 of the ureteroscope 1 is smaller than the inner diameter of the ureteral sheath tube 31. A gap for water injection is formed between the outer wall of the insertion tube 11 and the inner wall of the ureteral sheath tube 31. A second water injection interface 32a is provided on the ureteral sheath rear seat 32, which is connected to its interior. The gap between the cavity of the ureteral sheath rear seat 32 and the outer wall of the insertion tube 11 and the inner wall of the ureteral sheath tube 31 constitutes a channel for water injection.

[0045] The pressure control host 2 includes a control circuit 21, a water inlet pipe 22, a water outlet pipe 23, an image display module, a pressure display module and a first peristaltic pump 26. The camera 12, the light source lamp 13 and the pressure sensor 14 are electrically connected to the control circuit 21 of the pressure control host 2 outside the ureteroscope 1 through wires passing through the insertion tube 11. The control circuit 21 receives the pressure signal monitored by the pressure sensor 14, and the control circuit 21 sends a control signal to the first peristaltic pump 26. The outlet of the water inlet pipe 22 is respectively connected to the first water injection interface 11e at the rear of the instrument channel 11c of the ureteroscope 1 and the second water injection interface 32a of the ureteral sheath rear seat 32 of the sheath assembly. The outlet of the water outlet pipe 23 is connected to the external negative pressure source T, and the inlet of the water outlet pipe 23 is connected to the rear port of the stone discharge channel 11f. The first peristaltic pump 26 is installed on the water outlet pipe 23.

[0046] The image display module is a display 25. The real-time image signal captured by the camera 12 of the ureteroscope 1 is processed by the control circuit 21 and transmitted to the display 25. The light source lamp of the ureteroscope 1 is electrically connected to the control circuit 21 of the pressure control host 2 through a wire passing through the insertion tube.

[0047] The pressure display module is a liquid crystal display 24 , which is connected to the control circuit 21 . The liquid crystal display 24 displays the pressure inside the renal pelvis of the patient's kidney monitored by the pressure sensor 14 of the flexible ureteroscope 1 .

[0048] The inlet of the water inlet pipe 22 is connected to the water source. The water source connected to the inlet of the water inlet pipe 22 is a gravity water injection structure. The water source is provided with a water storage bag 41. The water storage bag 41 is connected to the inlet of the water inlet pipe 22 through a catheter. The horizontal height of the bottom of the water storage bag 41 has a height difference of 1m from the horizontal height of the front end of the insertion tube 11 of the ureteroscope 1.

[0049] Example 2

[0050] like Figure 6As shown, the only difference between this embodiment and the first embodiment is that the water inlet pipe 22' is connected to the water source, and a second peristaltic pump 27' is provided on the water inlet pipe 22' to directly provide water to the first water injection interface 11e' and the second water injection interface 32a'.

[0051] Compared with the gravity water injection structure of Example 1, the water pump water injection method of this embodiment does not have the high safety of ensuring the pressure in the renal pelvis as the gravity water injection structure of Example 1, but the water pump water injection has the advantages of relatively constant water pressure and adjustable pressure.

[0052] The above are only two embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A ureteropyeloscope system, characterized by: Includes ureteroscope and pressure control host; The flexible ureteroscope includes a front insertion tube and a rear handle. The front end of the insertion tube is inserted into the renal pelvis of the patient's kidney. The front end of the insertion tube is equipped with a camera, a light source, and a pressure sensor. The insertion tube is provided with an instrument channel and a stone discharge channel. The front end of the instrument channel extends to the front end surface of the insertion tube. The rear end of the instrument channel is provided with an instrument introduction port and a first water injection port. An optical fiber runs through the instrument channel from the instrument introduction port. The front end of the stone discharge channel also extends to the front end surface of the insertion tube. The pressure control host includes a control circuit, a water inlet pipe, a water outlet pipe and a first peristaltic pump. The pressure sensor is electrically connected to the control circuit of the pressure control host through a wire passing through the insertion tube. The control circuit receives the pressure signal monitored by the pressure sensor, and the control circuit sends a control signal to the first peristaltic pump. The first water injection interface at the rear of the instrument channel of the ureteroscope is connected to the water source through the water inlet pipe. The water outlet pipe of the pressure control host is connected to the stone discharge channel of the ureteroscope, and the first peristaltic pump is installed on the water outlet pipe.

2. The ureteropyeloscope system according to claim 1, characterized in that: The ureteral sheath tube further comprises a sheath assembly, which comprises a ureteral sheath tube and a ureteral sheath rear seat. The rear end of the ureteral sheath tube and the ureteral sheath rear seat are fixed. The insertion tube of the ureteroscope passes through the ureteral sheath rear seat and extends out of the front end of the ureteral sheath tube. The outer diameter of the insertion tube of the ureteroscope is smaller than the inner diameter of the ureteral sheath tube. A gap for water injection is formed between the outer wall of the insertion tube and the inner wall of the ureteral sheath tube. The ureteral sheath rear seat is provided with a second water injection interface which is communicated with the interior thereof. The second water injection interface is connected with the water inlet pipeline. The gap between the cavity of the ureteral sheath rear seat and the outer wall of the insertion tube and the inner wall of the ureteral sheath tube constitutes a channel for water injection.

3. The ureteropyeloscope system according to claim 1, wherein: The outer diameter of the insertion tube of the ureteroscope is 3.60-3.80mm, the aperture of the stone discharge channel is 2.0-2.2mm, and the aperture of the instrument channel is 0.5-0.8mm.

4. The ureteropyeloscope system according to claim 1, wherein: The pressure control host also includes an image display module, and the real-time image signal captured by the camera of the ureteroscope is transmitted to the image display module. The light source lamp of the ureteroscope is electrically connected to the control circuit of the pressure control host through a wire passing through the insertion tube.

5. The ureteropyeloscope system according to claim 1, characterized in that: The pressure control host also includes a pressure display module, which is connected to the control circuit. The pressure display module displays the pressure inside the renal pelvis of the patient's kidney monitored by the pressure measuring sensor of the ureteroscope.

6. The ureteropyeloscope system according to claim 1, characterized in that: The water source connected to the water inlet pipeline is a gravity water injection structure, which is provided with a water storage bag. The water storage bag is connected to the inlet of the water inlet pipeline, and the horizontal height of the bottom of the water storage bag is higher than the horizontal height of the front end of the insertion tube of the ureteroscope.

7. The ureteropyeloscope system according to claim 6, characterized in that: The height difference between the bottom of the water storage bag and the front end of the insertion tube of the ureteroscope is 0.8-1.2 m.

8. The ureteropyeloscope system according to claim 1, characterized in that: The pressure control host also includes a second peristaltic pump, the starting end of the water inlet pipeline is connected to the water source, and the second peristaltic pump is arranged on the water inlet pipeline.

9. The ureteropyeloscope system according to claim 1, characterized in that: The front end of the insertion tube is provided with two LED light source lamps, and the two LED light source lamps are located on both sides of the camera.

10. The method for using the ureteropyeloscopic system according to claim 1, comprising: Continuous water injection into the renal pelvis through the instrument channel and the channel between the insertion tube and the ureteral sheath; and At the same time, the return water is allowed to pass through the stone discharge channel of the inserted tube and discharged through the water outlet pipe of the pressure control host.

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