Dual channel nephroscopic

Abstract

The application discloses a double-channel nephropyeloscope, which comprises a first shell and a second shell, the first shell and the second shell are buckled to form a containing cavity, a base seat is arranged on the top of the cavity of the first shell, an instrument socket is arranged on the base seat, an instrument inlet is arranged on the end of the instrument socket away from the base seat, a perfusion recess is arranged on the base seat, an outer pipe joint is arranged on the front end of the perfusion recess, an inner pipe clamping sleeve is arranged on the rear end of the perfusion recess, a negative pressure four-way joint is arranged on the side of the inner pipe clamping sleeve away from the outer pipe joint, an insertion pipe and an instrument channel pipe are arranged on the negative pressure four-way joint and are connected with the perfusion recess, the instrument channel pipe is arranged close to the inner pipe clamping sleeve, the insertion pipe is arranged on the side of the negative pressure four-way joint away from the instrument channel pipe, and the insertion pipe, the instrument channel pipe, the inner pipe clamping sleeve, the perfusion recess and the outer pipe joint are coaxially and throughly connected. The application provides a double-channel nephropyeloscope which can realize negative pressure suction, perfusion and pressure measurement simultaneously.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and to a dual-channel renal pelvis endoscope, particularly a dual-channel renal pelvis endoscope that integrates negative pressure suction, perfusion, and pressure measurement. Background Technology

[0002] Current pyeloscopes are mostly flexible tubes, commonly referred to as pyeloscopes. When performing kidney stone surgery, they are often used in conjunction with rigid ureteroscopes. A zebra guidewire is placed, and a disposable ureteral sheath is inserted through the urethra to reach the renal pelvis and establish a stone retrieval channel. The flexible pyeloscope enters this channel within the sheath to locate the stone, breaks it up with a holmium laser, and then uses the sheath's negative pressure suction to remove the fragments. The instrument channel and water inlet channel of the flexible pyeloscope are the same. During operation, when the holmium laser is in the instrument channel, water is simultaneously injected to maintain a clear surgical field. The water also helps to dissipate the heat generated by the holmium laser, preventing burns to the renal pelvis. Since the instrument channel is relatively small, a larger water volume requires a higher inlet pressure. If the water is not drained from the renal pelvis in time, excessive inlet pressure can lead to renal pelvic hypertension and postoperative complications. A large inflow of fluid necessitates ensuring that water and lithotripsy can be rapidly and repeatedly suctioned out of the body through the negative pressure sheath. If the inflow is insufficient, the interval between suctioning sessions will be considerable, hindering rapid surgical completion and potentially leading to delays and requiring a second procedure. As mentioned earlier, achieving a large inflow necessitates increasing the inflow pressure, significantly raising the risks. Some flexible endoscopes employ a pressure sensor at the tip to measure the current pressure in the renal pelvis, which increases costs and necessitates a thicker endoscope tube. This thicker tube slows renal pelvis return because the endoscope occupies more space within the sheath, reducing the amount of fluid exiting through the sheath gaps and further increasing pressure, thus compromising surgical safety. These drawbacks require further solutions. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the purpose of this invention is to provide a dual-channel renal pelvis endoscope, which has integrated functions of negative pressure suction, perfusion and pressure measurement.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A dual-channel renal pelvis endoscope includes a first housing and a second housing, which are fastened together to form a receiving cavity; a base is provided at the top of the cavity of the first housing, an instrument socket is provided on the base, and an instrument inlet is provided at the end of the instrument socket away from the base. The base is provided with a grouting cavity. The front end of the grouting cavity is provided with an outer pipe joint, and the rear end of the grouting cavity is provided with an inner pipe sleeve. A negative pressure four-way valve is provided on the side of the inner pipe sleeve away from the outer pipe joint. The negative pressure four-way valve has an insertion tube and an instrument channel tube that are horizontally connected to the infusion cavity. The instrument channel tube and the inner tube sleeve are arranged close to each other. The insertion tube is located on the side of the negative pressure four-way valve away from the instrument channel tube. The insertion tube, the instrument channel tube, the inner tube sleeve, the infusion cavity and the outer tube connector are coaxially connected. A negative pressure tube is provided on the lower side of the negative pressure four-way valve and an infusion tube is provided on the lower side of the infusion cavity. The outer tube joint is provided with an outer tube extending forward, which is connected to the injection cavity. An inner tube is sleeved in the outer tube. The diameter of the outer tube is larger than that of the inner tube. The outer wall of the inner tube on one side is adjacent to the inner wall of the outer tube on the same side. An injection channel is formed between the gap between the outer wall of the inner tube and the inner wall of the outer tube. The tail end of the first housing is equipped with an injection connector, a suction connector, and a drainage connector.

[0005] Furthermore, in some embodiments, the first housing cavity is provided with a suction-drain tee, one end of which is connected to the suction and drainage connector via a conduit, and the other end of which is connected to the negative pressure pipe via a conduit away from the suction and drainage connector; a pressure relief port is provided on the side wall of the suction-drain tee, and a negative pressure relief pipe protruding from the housing of the first housing is provided, with the pressure relief port connected to the negative pressure relief pipe via a conduit.

[0006] Furthermore, in some embodiments, the inner tube extends backward from the tail end of the joint between the outer tube and the outer tube connector and extends toward the inner tube sleeve. The tail end of the inner tube passes through the infusion cavity and is placed in the inner tube sleeve. The inner tube is connected to the negative pressure four-way valve. The tail section of the inner tube is coaxially arranged with the instrument channel tube, insertion tube, instrument socket and instrument inlet.

[0007] Furthermore, in some embodiments, the front end of the outer tube away from the base is provided with an end head, and the end head is provided with a shell corresponding to the outer tube. The shell is provided with an inner sleeve corresponding to the inner tube. The inner sleeve is fitted in the shell, and a separation gap is provided between the tail end of the inner sleeve and the tail end of the shell near the first shell. The front end of the inner tube is set in the inner sleeve, and the front end of the outer tube is set in the tail section of the shell.

[0008] Furthermore, in some embodiments, the outer wall of the inner sleeve on one side is adjacent to the inner wall of the outer shell on the same side; the diameter of the outer shell is larger than the diameter of the inner sleeve, and an injection channel is provided between the gap between the outer wall of the inner sleeve and the inner wall of the outer shell.

[0009] Furthermore, in some embodiments, the front end of the end is provided with a main instrument port that is connected to the inner sleeve, and two water inlets are provided on both sides of the main instrument port that are connected to the injection channel between the outer wall of the inner sleeve and the inner wall of the outer shell. A camera port is provided between the two water inlets that is connected to the injection channel. The camera port, the two water inlets and the injection channel are connected to each other.

[0010] Furthermore, in some embodiments, a rotating wheel is provided in the middle of the first housing cavity, a pulling rod is provided on the rotating wheel, the pulling rod is located on the outside of the first housing, and the rotating wheel is provided with two outgoing steel wire ropes wound around it; The lower side of the injection cavity is provided with a double-channel spaced wire groove that is inclined toward the negative pressure four-way. The wire groove and the injection cavity are provided with a sealing element. The two outgoing steel wire ropes on the rotating wheel pass through the double-channel spaced wire groove and then pass through the sealing element to enter the injection cavity.

[0011] Furthermore, in some embodiments, the lower side of the negative pressure four-way is provided with an inclined negative pressure tube, and an acute angle is formed between the negative pressure tube and the insertion tube; the lower side of the injection cavity is provided with an injection tube inclined towards the negative pressure four-way, and an acute angle is formed between the injection tube and the injection cavity near the negative pressure four-way, and the injection tube and the negative pressure tube are arranged parallel to each other; the top side of the negative pressure four-way is provided with a pressure measuring tube, and the opening of the pressure measuring tube protrudes from the outside of the first housing; The infusion tube is connected to the infusion connector via a conduit. The instrument inlet is located on the outside of the first housing. The base is equipped with a concave infusion sealing cap that matches the infusion cavity.

[0012] Furthermore, in some embodiments, a camera wire is threaded through the tail end of the first housing. The camera wire at the tail end of the first housing passes through a wire groove and then through a seal to enter the injection cavity. The steel wire rope and the camera wire are threaded through the injection channel between the outer wall of the inner tube and the inner wall of the outer tube after entering the injection cavity.

[0013] The renal pelvis endoscope of this application adopts a dual-channel design, with a separate instrument channel (inner tube 68) and a water injection channel (irrigation channel 28). The inner tube 68 (instrument channel) is designed as the largest channel, capable of instrument insertion, stone fragment removal, drainage, and pressure measurement. For these functions, the ureteral guiding sheath can be replaced by this renal pelvis endoscope. The function of the ureteral guiding sheath is to establish the channel, drain water, and aspirate stone fragments. The instrument channel (inner tube) of this renal pelvis endoscope completes all the functions of the guiding sheath; therefore, using this renal pelvis endoscope eliminates the need for a ureteral guiding sheath.

[0014] The nephroplasty of this application features a separate irrigation channel (perfusion channel) for water injection, while the instrument channel (inner tube) can also serve as a pressure measurement channel. A pressure measurement tube 48 (pressure measurement point) is designed on the housing (handle) to monitor the pressure within the renal pelvis, as pressure can be transmitted through the tube. This dual-channel design separates the irrigation and suction functions, allowing the instrument channel (connected to the inner tube) to function as a pressure measurement channel, unaffected by irrigation pressure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the base assembly portion according to an embodiment of the present invention; Figure 3 This is an assembly diagram of an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first housing portion according to an embodiment of the present invention; Figure 5 This is a cross-sectional structural diagram of an embodiment of the present invention; Figure 6 This is a schematic diagram of the end portion of an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the principle of the infusion channel in an embodiment of the present invention; Figure 8 This is a schematic diagram of the outer tube portion in an embodiment of the present invention.

[0016] Figure 9 This is a schematic diagram illustrating the principle of the negative pressure suction channel in an embodiment of the present invention.

[0017] Explanation of markings in the diagram: First housing 11, second housing 12, pull rod 13, instrument socket 14, infusion connector 17, suction and drainage connector 18, instrument inlet 19, rotating wheel 21, negative pressure relief pipe 22, suction and drainage tee 23, pressure relief port 25, instrument channel pipe 26, seal 27, infusion channel 28, outer shell 29, base 41, infusion cavity 42, outer pipe connector 43, inner pipe clamp 44, negative pressure four-way connector 45, insertion pipe 46, negative pressure pipe 47, pressure measuring pipe 48, infusion pipe 49, wire groove 51, infusion sealing cap 52, end 61, inner clamp sleeve 62, main instrument port 63, camera port 64, two side water inlets 65, steel wire rope 66, camera cable 67, inner pipe 68, outer pipe 69. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] In the description of this invention, it should be noted that the terms "lateral," "upper," "lower," "front," "rear," "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," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0020] The renal pelvis endoscope of this application adopts a semi-flexible structure, meaning the head has a normal serpentine structure that allows for bending, enabling it to flexibly locate stones within the renal pelvis just like a flexible endoscope. The tube body is made of the same 316L stainless steel as a rigid ureteroscope, with an added PTFE hydrophobic coating to prevent water molecules from forming a waxy surface and reducing friction. Simultaneously, the serpentine portion of the head also has a hydrophilic coating to reduce friction when entering the cavity. This design combines the flexibility of a flexible endoscope with the rigidity of a rigid endoscope, replacing both rigid and flexible ureteroscopes, allowing the entire surgical procedure to be performed with a single endoscope.

[0021] Referring to the accompanying drawings, the present invention includes a first housing 11 and a second housing 12, which are fastened together to form an accommodating cavity. A rotating wheel 21 is provided in the middle of the cavity of the first housing 11, and a lever 13 is provided on the rotating wheel 21. The lever 13 is located on the outside of the first housing 11. The rotating wheel 21 is provided with a double-headed (two-wire) steel wire rope 66, which is connected to the rotating wheel 21. The double-headed (two-wire) steel wire rope 66 is connected to the front end of the snake bone structure. The lever 13 is connected to the rotating wheel 21, and the snake bone structure can be adjusted up and down by hand. The steel wire rope 66 is used to control the bending of the front end of the snake bone structure within 275 degrees.

[0022] Furthermore, in one embodiment, the top of the cavity (accommodating cavity) of the first housing 11 is provided with a base 41, and an instrument socket 14 is provided on the base 41. An instrument inlet 19 is provided at the end of the instrument socket 14 away from the base 41. The instrument inlet 19 is located on the outside of the first housing 11 and is provided with a rubber sealing cap. The tail end of the first housing 11 is provided with an infusion connector 17 and a suction and drainage connector 18. The infusion connector 17 is connected to an external water inlet pipe. Furthermore, a camera cable 67 is threaded through the tail end of the first housing 11.

[0023] Furthermore, in one embodiment, see Appendix Figure 2 As shown, attached Figure 2The diagram shows the structure of the base 41. The base 41 has an infusion cavity 42. An outer tube connector 43 is located at the front end of the infusion cavity 42, and an inner tube sleeve 44 is located at the rear end. A negative pressure four-way connector 45 is located on the side of the inner tube sleeve 44 away from the outer tube connector 43. An insertion tube 46 and an instrument channel tube 26 are laterally connected to the infusion cavity 42 on the negative pressure four-way connector 45. The instrument channel tube 26 is located adjacent to the inner tube sleeve 44. The insertion tube 46 is positioned on the negative pressure four-way connector 45 on the side away from the instrument channel tube 26. The insertion tube 46, instrument channel tube 26, inner tube sleeve 44, infusion cavity 42 and outer tube connector 43 are coaxially connected. A pressure measuring tube 48 is provided on the top side of the negative pressure four-way connector 45. The opening of the pressure measuring tube 48 protrudes and is located on the outside of the first housing 11. An inclined negative pressure tube 47 is provided on the lower side of the negative pressure four-way connector 45. An acute angle is formed between the negative pressure tube 47 and the insertion tube 46.

[0024] The pressure measuring tube 48 (pressure measuring port) can be connected to pressure measuring devices such as pressure gauges, pressure sensors, and pressure measuring lines to monitor the pressure in the renal pelvis. When not in use, this port is sealed with a sealing cap to ensure the attraction of the inner tube 68.

[0025] An instrument socket 14 is provided at the end of the insertion tube 46 away from the instrument channel tube 26. The instrument socket 14 is sleeved on the insertion tube 46, and the instrument inlet 19 is located at the end of the instrument socket 14 away from the insertion tube 46.

[0026] The lower side of the filling cavity 42 is provided with a filling pipe 49 inclined towards the negative pressure four-way 45. The filling pipe 49 and the filling cavity 42 form an acute angle near the negative pressure four-way 45. The filling pipe 49 is arranged parallel to the negative pressure pipe 47. The filling pipe 49 is connected to the filling connector 17 through a conduit. The lower side of the filling cavity 42 is provided with a double-channel spaced wire groove 51 inclined towards the negative pressure four-way 45. The wire groove 51 and the filling cavity 42 (at the junction) are provided with a sealing element 27. The wire groove 51 is used for the steel wire rope 66 and the camera wire 67 to enter. The double-headed (two-wire) steel wire rope 66 on the rotating wheel 21 passes through the double-channel spaced wire groove 51 and then through the sealing element 27 to enter the filling cavity 42. The camera wire 67 at the tail end of the first housing 11 passes through the wire groove 51 and then through the sealing element 27 to enter the filling cavity 42.

[0027] The negative pressure four-way valve 45, the injection cavity 42, the wire groove 51, the injection pipe 49 and the inner tube sleeve 44 are all set on the base seat 41, and the negative pressure four-way valve 45, the injection cavity 42, the wire groove 51, the injection pipe 49 and the inner tube sleeve 44 (base seat 41) are integrally formed.

[0028] The base 41 is equipped with a concave filling sealing cap 52 that matches the filling cavity 42. The filling sealing cap 52 is placed on the filling cavity 42. After the filling sealing cap 52 is sealed with glue around its connection with the base 41, water entering the filling cavity 42 through the water inlet channel from the filling connector 17 and the water inlet pipe 49 will enter the end 61 through the filling channel 28 (gap) between the outer pipe 69 and the inner pipe 68, and flow out from the water inlets 65 on both sides of the end 61. The water inlets 65 on both sides enter through the filling channel 28 (gap) between the outer pipe 69 and the inner pipe 68 (instrument channel) and flow out from the water inlets 65 on both sides.

[0029] Furthermore, in one embodiment, see Appendix Figure 9 As shown, attached Figure 9 The diagram illustrates the principle of negative pressure suction flow. The first housing 11 cavity (accommodation cavity) is equipped with a suction-drain tee 23. One end of the suction-drain tee 23 is connected to the suction and drain connector 18 via a conduit, and the other end of the suction-drain tee 23, away from the suction and drain connector 18, is connected to the negative pressure pipe 47 via a conduit. A pressure relief port 25 is provided on the side wall of the suction-drain tee 23. A negative pressure relief pipe 22 (pressure relief inlet, suction inlet) extends outward from the housing of the first housing 11. The pressure relief port 25 is connected to the negative pressure relief pipe 22 via a conduit. When negative pressure suction is not needed, the pressure relief port 25 of the suction-drain tee 23 is open to the negative pressure relief pipe 22, and most of the suction force leaks out through the pressure relief port 25. When suction is needed, the suction inlet of the negative pressure relief pipe 22 can be pressed with a finger, and the suction force will flow from the main pipe of the suction-drain tee 23 through the negative pressure pipe 47 to the inner pipe 68 (main instrument channel) to suction out the stones. The negative pressure suction and the water flowing out from the inner pipe 68 channel are discharged from the negative pressure pipe 47 (drain outlet).

[0030] When the suction drain tee 23 is connected to an external negative pressure machine, the external suction force is always present, but the mirror head does not want a large suction force. The pressure relief port 25 can release most of the pressure and will not cause a large change in the pressure inside the renal pelvis. At this time, only a small amount of suction will enter the renal pelvis, which can help increase the pressure inside the renal pelvis. To use the suction force, just press the air inlet of the negative pressure relief pipe 22.

[0031] Furthermore, in one embodiment, the outer tube connector 43 is provided with a forward-extending outer tube 69, which is connected to the injection cavity 42. An inner tube 68 (main instrument channel) is sleeved in the outer tube 69. The outer wall of the inner tube 68 is adjacent to the inner wall of the outer tube 69, that is, the outer wall on one side of the inner tube 68 is adjacent to the inner wall on the same side of the outer tube 69. Furthermore, the inner tube 68 and the outer tube 69 are integrally formed. The ratio of the diameter of the outer tube 69 to the diameter of the inner tube 68 is 1:0.65~0.8. Preferably, the ratio of the diameter of the outer tube 69 to the diameter of the inner tube 68 is 1:0.75. An injection channel 28 (water injection) is formed between the gap (slit) between the outer wall of the inner tube 68 and the inner wall of the outer tube 69.

[0032] See appendix Figure 5 As shown, attached Figure 5 The connection structure of the inner tube 68 is shown in the figure. The inner tube 68 extends backward from the tail end of the outer tube 69 (where it is joined with the outer tube connector 43) and extends toward the inner tube sleeve 44. The tail end of the inner tube 68 passes through the infusion cavity 42 and is placed in the inner tube sleeve 44. The inner tube 68 is connected to the negative pressure four-way valve 45. The tail section of the inner tube 68 (rear part) is coaxially arranged with the instrument channel tube 26, the insertion tube 46, the instrument socket 14 and the instrument inlet 19.

[0033] After the steel wire rope 66 and the camera cable 67 enter the injection cavity 42, they are then threaded through the injection channel 28 (gap) between the outer wall of the inner tube 68 and the inner wall of the outer tube 69.

[0034] Furthermore, in one embodiment, see Appendix Figure 6 As shown, attached Figure 6 The diagram illustrates the connection structure between end 61 and outer tube 69. The outer tube 69 has an end 61 at its front end away from the base 41. An outer shell 29, matching the outer tube 69, is provided on end 61. An inner sleeve 62, matching the inner tube 68, is provided within the outer shell 29. The inner sleeve 62 is fitted within the outer shell 29, and a separation gap exists between the tail end of the inner sleeve 62 and the tail end of the outer shell 29 near the first housing 11. The front end of the inner tube 68 is located within the inner sleeve 62, and the front end of the outer tube 69 is located within the tail section of the outer shell 29. Furthermore, the outer tube 69 is located within the separation gap between the tail section of the outer shell 29 and the inner sleeve 62, meaning the front end of the outer tube 69 is located within the gap between the tail section of the outer shell 29 and the inner sleeve 62.

[0035] The outer wall of the inner sleeve 62 is adjacent to the inner wall of the outer shell 29, that is, the outer wall of one side of the inner sleeve 62 is adjacent to the inner wall of the outer shell 29 on the same side; the ratio of the diameter of the outer shell 29 to the diameter of the inner sleeve 62 is 1:0.65~0.8, preferably, the ratio of the diameter of the outer shell 29 to the diameter of the inner tube 68 is 1:0.75, and the gap (slit) between the outer wall of the inner sleeve 62 and the inner wall of the outer shell 29 forms an injection channel 28. Furthermore, the outer shell 29 and the inner sleeve 62 are integrally formed.

[0036] Furthermore, in one embodiment, the front end of the end 61 is provided with a main instrument port 63 that is connected to the inner sleeve 62, that is, the opening of the inner sleeve 62 extending to the front end of the end 61 forms the main instrument port 63; on both sides of the main instrument port 63, there are two water inlets 65 that are connected to the injection channel 28 (water injection) between the outer wall of the inner sleeve 62 and the inner wall of the outer shell 29; between the two water inlets 65 (water injection outlet), there is a camera port 64 that is connected to the injection channel 28; the camera port 64, the two water inlets 65, and the injection channel 28 are connected in a continuous manner.

[0037] It should be clarified that the discussion of the foregoing embodiments is not intended to limit the scope of this application. The terminology used in the specification also does not constitute a limitation on the applicability or scope of protection of this application. Those skilled in the art should understand that other terms, parts, components, and layout schemes may be used to achieve the core design intent of this application. It should be noted that those skilled in the art will recognize that there are various equivalent alternatives to the described embodiments, and that several modifications and improvements can be made without departing from the concept of this application; all of these fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A dual-channel renal pelvis endoscope, comprising a first housing (11) and a second housing (12), wherein the first housing (11) and the second housing (12) are fastened together to form a receiving cavity; characterized in that, The top of the cavity of the first housing (11) is provided with a base seat (41), and an instrument socket (14) is provided on the base seat (41). An instrument inlet (19) is provided at one end of the instrument socket (14) away from the base seat (41). The base (41) has an injection cavity (42), the front end of the injection cavity (42) is provided with an outer pipe joint (43), the rear end of the injection cavity (42) is provided with an inner pipe sleeve (44), and the side of the inner pipe sleeve (44) away from the outer pipe joint (43) is provided with a negative pressure four-way valve (45). The negative pressure four-way valve (45) is provided with an insertion tube (46) and an instrument channel tube (26) that are horizontally connected to the infusion cavity (42). The instrument channel tube (26) is arranged close to the inner tube sleeve (44). The insertion tube (46) is arranged on the side of the negative pressure four-way valve (45) away from the instrument channel tube (26). The insertion tube (46), the instrument channel tube (26), the inner tube sleeve (44), the infusion cavity (42) and the outer tube connector (43) are coaxially connected. A negative pressure tube (47) is provided on the lower side of the negative pressure four-way valve (45), and an infusion tube (49) is provided on the lower side of the infusion cavity (42). The outer tube connector (43) is provided with an outer tube (69) extending forward. The outer tube (69) is connected to the injection cavity (42). An inner tube (68) is sleeved in the outer tube (69). The diameter of the outer tube (69) is larger than that of the inner tube (68). The outer wall of one side of the inner tube (68) is adjacent to the inner wall of the outer tube (69) on the same side. An injection channel (28) is formed between the gap between the outer wall of the inner tube (68) and the inner wall of the outer tube (69). The tail end of the first housing (11) is provided with an injection connector (17) and a suction and drainage connector (18).

2. The dual-channel renal pelvis endoscope according to claim 1, characterized in that, The first housing (11) cavity is provided with a suction and drainage tee (23). One end of the suction and drainage tee (23) is connected to the suction and drainage connector (18) through a conduit. The end of the suction and drainage tee (23) away from the suction and drainage connector (18) is connected to the negative pressure pipe (47) through a conduit. The side wall of the suction and drainage tee (23) is provided with a pressure relief port (25). The housing of the first housing (11) is provided with a negative pressure relief pipe (22) extending outward. The pressure relief port (25) is connected to the negative pressure relief pipe (22) through a conduit.

3. A dual-channel renal pelvis endoscope according to claim 1, characterized in that, The inner tube (68) extends backward from the end of the joint between the outer tube (69) and the outer tube connector (43) and extends toward the inner tube sleeve (44). The end of the inner tube (68) passes through the infusion cavity (42) and is placed in the inner tube sleeve (44). The inner tube (68) is connected to the negative pressure four-way valve (45). The end of the inner tube (68) is coaxially arranged with the instrument channel tube (26), the insertion tube (46), the instrument socket (14) and the instrument inlet (19).

4. A dual-channel renal pelvis endoscope according to claim 1, characterized in that, The outer tube (69) has an end (61) at its front end away from the base (41). The end (61) has a shell (29) that matches the outer tube (69). The shell (29) has an inner sleeve (62) that matches the inner tube (68). The inner sleeve (62) is fitted in the shell (29). There is a separation gap between the tail end of the inner sleeve (62) and the tail end of the shell (29) near the first shell (11). The front end of the inner tube (68) is set in the inner sleeve (62), and the front end of the outer tube (69) is set in the tail section of the shell (29).

5. A dual-channel renal pelvis endoscope according to claim 4, characterized in that, The outer wall of the inner sleeve (62) on one side is adjacent to the inner wall of the outer shell (29) on the same side; the diameter of the outer shell (29) is larger than the diameter of the inner sleeve (62), and an injection channel (28) is provided between the gap between the outer wall of the inner sleeve (62) and the inner wall of the outer shell (29).

6. A dual-channel renal pelvis endoscope according to claim 4, characterized in that, The front end of the end (61) is provided with a main instrument port (63) that is connected to the inner sleeve (62). On both sides of the main instrument port (63) are water inlets (65) that are connected to the injection channel (28) between the outer wall of the inner sleeve (62) and the inner wall of the outer shell (29). Between the two water inlets (65) is a camera port (64) that is connected to the injection channel (28). The camera port (64), the two water inlets (65) are connected to the injection channel (28).

7. A dual-channel renal pelvis endoscope according to claim 1, characterized in that, The first housing (11) has a rotating wheel (21) in the middle of its cavity. The rotating wheel (21) has a lever (13) on it. The lever (13) is located on the outside of the first housing (11). The rotating wheel (21) has two outgoing steel wire ropes (66) wound around it. The lower side of the filling cavity (42) is provided with a double-spaced wire groove (51) that is inclined toward the negative pressure four-way (45). The wire groove (51) and the filling cavity (42) are provided with a sealing element (27). The two outgoing steel wire ropes (66) on the wheel (21) pass through the double-spaced wire groove (51) and then pass through the sealing element (27) into the filling cavity (42).

8. A dual-channel renal pelvis endoscope according to claim 1, characterized in that, The lower side of the negative pressure four-way (45) is provided with an inclined negative pressure pipe (47), and an acute angle is formed between the negative pressure pipe (47) and the insertion pipe (46); the lower side of the injection cavity (42) is provided with an injection pipe (49) inclined towards the negative pressure four-way (45), and an acute angle is formed between the injection pipe (49) and the injection cavity (42) near the side of the negative pressure four-way (45), and the injection pipe (49) and the negative pressure pipe (47) are arranged in parallel; the top side of the negative pressure four-way (45) is provided with a pressure measuring pipe (48), and the opening of the pressure measuring pipe (48) protrudes out and is located on the outside of the first housing (11); The infusion tube (49) is connected to the infusion connector (17) through the conduit. The instrument inlet (19) is located on the outside of the first housing (11). The base (41) is provided with a concave infusion sealing cap (52) that matches the infusion cavity (42).

9. A dual-channel renal pelvis endoscope according to claim 1, characterized in that, A camera wire (67) is threaded through the tail end of the first housing (11). The camera wire (67) at the tail end of the first housing (11) passes through the wire groove (51) and then through the seal (27) into the injection cavity (42). After the steel wire rope (66) and camera cable (67) enter the injection cavity (42), they are threaded through the injection channel (28) between the outer wall of the inner tube (68) and the inner wall of the outer tube (69).

Images