Dual fluid valve for endoscope

Abstract

Endoscopes, such as duodenoscopes, include a dual fluid valve for controlling the flow of liquid, such as water, and gas, such as air, through a flexible tubular probe to respectively irrigate or insufflate a patient's internal cavity. The dual fluid valve can be a single component, an interconnected assembly of components, or a plurality of separate components. Some examples of dual fluid valves include a stepped diameter valve core with radial or circumferential fluid passages. In some examples, the dual fluid valve includes a tube clamp that, by closing against a resilient tube, prevents the flow of water or other liquid therethrough. Some examples of dual fluid valves include a resiliently flexible valve housing to urge the valve to a normally closed position. In some examples, selectively covering or uncovering a vent hole in the valve housing controls the flow of air for insufflation.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 63 / 589,857, filed October 12, 2023, the disclosure of which is incorporated herein by reference. Technical Field

[0002] Several aspects of this disclosure generally relate to endoscopes (e.g., duodenoscopes, colonoscopes, bronchoscopes, etc.), and more specifically, to fluid valves for use in endoscopes. Background Technology

[0003] Endoscopy has revolutionized the fields of medical diagnostics and interventional procedures, allowing medical professionals to directly observe internal cavities of the human body without invasive surgery. Among various types of endoscopes, the duodenoscope holds a prominent position due to its ability to explore the upper digestive tract (especially the duodenum, pancreas, and bile ducts). The duodenoscope not only facilitates visual examination but also enables a range of therapeutic procedures, making it an indispensable tool in modern medicine.

[0004] A duodenoscopy typically consists of a flexible, tubular probe that can be inserted into the patient's body. A light source at the distal end of the probe provides illumination for observation. A high-resolution camera is usually located near the light source to capture images or video of the lumen in real time. The camera's performance ensures detailed and accurate observation.

[0005] Duodenoscope probes typically include a working channel for inserting various instruments to perform procedures such as biopsies, tissue resections, or stent placement. To provide operability and facilitate access to complex anatomical structures, many duodenoscope probes have internal filaments. The tension in these filaments can be adjusted in two opposing ways by manipulating knobs on the duodenoscope's handle. Adjusting the filament tension allows the probe to bend and steer.

[0006] The handle body typically includes valves for controlling fluid flow, such as air for blowing and water for flushing. Blowing air is a technique used during endoscopic procedures to improve visualization. It involves introducing air or carbon dioxide into the cavity being examined, which helps expand the space and thus improves visibility of the target area. In duodenoscopy, blowing air helps assess the mucosal surface and identify abnormalities that might otherwise be obscured. This technique improves diagnostic accuracy and helps determine appropriate treatment options.

[0007] Irrigation typically involves the introduction of a fluid, such as sterile water or saline. During endoscopic procedures, irrigation serves multiple purposes. It helps clear blood, debris, or mucus from the field of view, ensuring a clear view. Irrigation can also facilitate therapeutic interventions by irrigating the area of ​​interest, thereby improving access to and manipulation of tissue. This feature enhances the safety and effectiveness of procedures such as polyp removal or tissue sampling. Summary of the Invention

[0008] This disclosure generally relates to endoscopes and methods of using them. In some examples, the endoscope may include a valve housing supported by a handle body, wherein the valve housing includes a liquid inlet, a liquid outlet, a gas inlet, and a gas outlet. In some examples, the endoscope may include a valve core having a first portion and a second portion, wherein the first portion has a gas passage and the second portion has a liquid passage. In some examples, the valve core is movable between a closed position and a flushing position. In some examples, the valve core and the valve housing are combined to form a dual-fluid valve selectively configured into an exhaust configuration and a blow-through configuration. In some examples, when the valve core is in the flushing position, the liquid passage fluidly connects the liquid inlet to the liquid outlet. In some examples, when the dual-fluid valve is in the blow-through configuration, the gas passage fluidly connects the gas inlet to the gas outlet. Some examples of the endoscope include a flexible tubular probe having a proximal end attached to the handle body and a distal end insertable into a patient. In some examples, the flexible tubular probe connects the liquid outlet and the gas outlet in fluid communication with the distal end. In some examples, the diameter of the first portion of the valve core is larger than that of the second portion. In some examples, the gas passage and the liquid passage extend circumferentially around the valve core. In some examples, the gas passage and the liquid passage extend radially through the valve core. In some examples, the valve core includes a push-button head with a vent hole. In some examples, covering the vent hole puts the valve in a puff configuration. In some examples, exposing the vent hole puts the valve in a discharge configuration. In some examples, the valve core in the flush position blocks fluid communication between the gas inlet and the gas outlet.

[0009] In some examples, the endoscope may include a flexible tube connecting the fluid inlet to the fluid outlet. In some examples, the flexible tube may deform between a deformable shape and a more relaxed shape. In some examples, when the flexible tube is in the deformable shape, it provides stronger flow restriction than when it is in the more relaxed shape. Some examples of the endoscope may include a clamp that engages the flexible tube. In some examples, the clamp is movable between a shut-off position and a flushing position. In some examples, the clamp in the shut-off position forces the flexible tube to the deformable shape. In some examples, the clamp in the flushing position returns the flexible tube to the more relaxed shape.

[0010] In some examples, the use of the endoscope includes: inserting the flexible tubular probe into the patient; injecting gas or liquid into the patient through the flexible tubular probe; clamping the deformable tube to reduce the flow rate of the liquid delivered to the patient; and manually blocking the drain hole to increase the flow rate of the gas delivered to the patient.

[0011] The above description is provided to aid in understanding some features of this disclosure and is not intended to be a complete description. This disclosure can be fully understood by combining the entire specification, claims, drawings, and abstract.

[0012] In some embodiments, the disclosure can be implemented as an endoscope for use with a patient. The endoscope may include: a handle body; a valve housing supported by the handle body, the valve housing providing a liquid inlet, a liquid outlet, a gas inlet, and a gas outlet; a valve core having a first portion and a second portion, the first portion at least partially defining a gas passage, the second portion at least partially defining a liquid passage, the valve core being selectively movable relative to the valve housing to a closed position and a flushing position, the valve core combined with the valve housing providing a dual-fluid valve selectively configured as an exhaust configuration and a purge configuration; when the valve core is in the flushing position, the liquid passage fluidly connects the liquid inlet to the liquid outlet, and when the dual-fluid valve is in the purge configuration, the gas passage fluidly connects the gas inlet to the gas outlet; and a flexible tubular probe having a proximal end attached to the handle body and a distal end insertable into the patient, the flexible tubular probe fluidly connecting the liquid outlet and the gas outlet to the distal end.

[0013] In a further embodiment of the endoscope, the diameter of the first portion is larger than that of the second portion.

[0014] In a further embodiment of the endoscope, the gas passage and the liquid passage extend circumferentially around the valve core.

[0015] In a further embodiment, the endoscope may include a button head located on the valve core, wherein the valve core and the button head define an exhaust port, wherein when the exhaust port is covered and the valve core is in the closed position, the dual-fluid valve is in the blowing configuration, and when the exhaust port is open, the dual-fluid valve is in the discharge configuration, wherein when the dual-fluid valve is in the discharge configuration, the exhaust port fluidly connects the gas passage to the atmosphere, and when the dual-fluid valve is in the blowing configuration, the exhaust port is covered and fluid flow through the exhaust port into the atmosphere is inhibited.

[0016] In a further embodiment of the endoscope, the valve core in the flushing position blocks fluid communication between the gas inlet and the gas outlet.

[0017] In a further embodiment of the endoscope, the valve core in the closed position blocks fluid communication between the liquid inlet and the liquid outlet.

[0018] In a further embodiment of the endoscope, the gas passage and the liquid passage pass through the valve core.

[0019] In a further embodiment, the endoscope may further include a spring that pushes the valve core to the closed position.

[0020] In a further embodiment of the endoscope, the valve core is made of metal, and the valve housing is made of polymer.

[0021] In some embodiments, the disclosure can be implemented as an endoscope. The endoscope may include: a handle body; a valve housing supported by the handle body, the valve housing providing a liquid inlet, a liquid outlet, a gas inlet, and a gas outlet; a flexible tube connecting the liquid inlet to the liquid outlet, the flexible tube being deformable between a deformable shape and a more relaxed shape, the flexible tube providing stronger flow restriction when in the deformable shape compared to when in the more relaxed shape; a clamp engaging the flexible tube, the clamp being movable between a shut-off position and a flushing position, the clamp in the shut-off position forcing the flexible tube to the deformable shape, the clamp in the flushing position causing the flexible tube to return to the more relaxed shape; and a flexible tubular probe having a proximal end attached to the handle body and a distal end insertable into the patient, the flexible tubular probe fluidly connecting the liquid outlet and the gas outlet to the distal end.

[0022] In a further embodiment, the endoscope may include: an inlet conduit; an outlet conduit extending through the flexible tubular probe; a first connector that connects the inlet conduit to the flexible tube at the inlet; and a second connector that connects the outlet conduit to the flexible tube at the outlet.

[0023] In a further embodiment of the endoscope, the elastic flexible portion of the valve housing allows the clamping member to move between the closed position and the flushing position.

[0024] In a further embodiment of the endoscope, the elasticity of the valve housing pushes the clamping member to the closed position.

[0025] In a further embodiment of the endoscope, the clamping member is seamlessly integrated into the valve housing, and the resilient flexible portion of the valve housing allows the clamping member to move between the closed position and the flushing position.

[0026] In a further embodiment of the endoscope, the valve housing, combined with the flexible tube and the clamping member, provides a dual-fluid valve. The valve housing provides a gas passage between the gas inlet and the gas outlet. The valve housing defines a vent orifice that is fluidly connected to the gas passage. The vent orifice is selectively covered and exposed by the user. When covered, the dual-fluid valve is in a puffing configuration. When exposed, the dual-fluid valve is in a discharge configuration. When the dual-fluid valve is in the discharge configuration, the vent orifice fluidly connects the gas passage to the atmosphere. When the dual-fluid valve is in the puffing configuration, the vent orifice is covered and fluid flow through the vent orifice into the atmosphere is inhibited.

[0027] In a further embodiment of the endoscope, the valve housing is a seamless, monolithic piece.

[0028] In a further embodiment, the endoscope may include a spring that pushes the flexible tube into the deformable shape.

[0029] In some embodiments, the disclosure can be implemented as a method of using an endoscope on a patient, wherein the endoscope includes a flexible tubular probe, a deformable tube, and a valve with a drain port. The method may include: inserting the flexible tubular probe into the patient; selectively injecting gas and liquid into the patient through the flexible tubular probe; clamping the deformable tube to reduce the flow rate of the liquid delivered to the patient; and manually blocking the drain port to increase the flow rate of the gas delivered to the patient.

[0030] In a further embodiment of the method, the endoscope includes a resilient, flexible valve housing that engages the deformable tube and defines the discharge orifice.

[0031] In a further embodiment, the method may include bending the elastic, flexible valve housing to increase the liquid flow rate. Attached Figure Description

[0032] Figure 1 is a perspective view of an exemplary endoscope incorporating various aspects of this disclosure.

[0033] Figure 2 This is a cross-sectional view of an exemplary valve in the off position and in a discharge configuration, wherein the valve includes several aspects of this disclosure.

[0034] Figure 3 Is with Figure 2 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0035] Figure 4 Is with Figure 2 and Figure 3 A similar cross-sectional view, but showing the valve in the flushing position.

[0036] Figure 5 This is a cross-sectional view of another exemplary valve in the off position and in the discharge configuration, wherein the valve includes several aspects of this disclosure.

[0037] Figure 6 Is with Figure 5 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0038] Figure 7 Is with Figure 5 and Figure 6 A similar cross-sectional view, but showing the valve in the flushing position.

[0039] Figure 8 This is a perspective view of another valve in the off position and in the discharge configuration, wherein the valve includes several aspects of this disclosure.

[0040] Figure 9 Is with Figure 8 A similar 3D view, but showing the valve in the flushing position and in the discharge configuration.

[0041] Figure 10 Is with Figure 8 and Figure 9 A similar 3D view, but showing the valve in the off position and in the blowing configuration.

[0042] Figure 11 It is along Figure 8 The cross-sectional view obtained from line 11-11.

[0043] Figure 12 It is along Figure 9 The cross-sectional view obtained from line 12-12.

[0044] Figure 13 This is a perspective view of another valve in the off position and in the discharge configuration, wherein the valve includes several aspects of this disclosure.

[0045] Figure 14 It is along Figure 13 The cross-sectional view obtained from line 14-14.

[0046] Figure 15 It is along Figure 13 The cross-sectional view obtained from line 15-15.

[0047] Figure 16 Is with Figure 14 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0048] Figure 17 Is with Figure 15 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0049] Figure 18 Is with Figure 16 Similar cross-sectional view, but showing the valve in the flushing position and in the blowing configuration.

[0050] Figure 19 Is with Figure 17 Similar cross-sectional view, but showing the valve in the flushing position and in the blowing configuration.

[0051] Figure 20 This is a perspective view of another valve in the off position and in the discharge configuration, wherein the valve includes several aspects of this disclosure.

[0052] Figure 21 It is along Figure 20 The cross-sectional view obtained from line 21-21.

[0053] Figure 22 It is along Figure 20 The cross-sectional view obtained from line 22-22.

[0054] Figure 23 Is with Figure 21 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0055] Figure 24 Is with Figure 22 A similar cross-sectional view, but showing the valve in the off position and in the blowing configuration.

[0056] Figure 25 Is with Figure 23 Similar cross-sectional view, but showing the valve in the flushing position and in the blowing configuration.

[0057] Figure 26 Is with Figure 24 Similar cross-sectional view, but showing the valve in the flushing position and in the blowing configuration.

[0058] Figure 27 This is a perspective view of another valve in the off position and in the discharge configuration, wherein the valve includes several aspects of this disclosure.

[0059] Figure 28 It is along Figure 27 The cross-sectional view obtained from line 28-28.

[0060] Figure 29 yes Figure 27 The front view.

[0061] Figure 30 Is with Figure 28 Similar cross-sectional view, but showing the valve in the closed position and in the blowing configuration.

[0062] Figure 31 Is with Figure 29 A similar front view, but showing the valve in the closed position and in the blowing configuration.

[0063] Figure 32 Is with Figure 30 A similar cross-sectional view, but showing the valve in the flushing position and in the discharge configuration.

[0064] Figure 33 Is with Figure 31 A similar front view, but showing the valve in the flush position and in the discharge configuration.

[0065] Figure 34 This is a flowchart illustrating various method steps using an endoscope, wherein the method steps relate to multiple aspects of this disclosure. Detailed Implementation

[0066] Figures 1 to 34Several examples of a dual-fluid valve 12 for an endoscope 10 and their usage are shown. Regarding the term "dual-fluid," when used for a valve, it means that the valve can handle at least two fluids, one of which is a gas and the other is a liquid. The valve can be a single component, an interconnected assembly of components, or multiple independent components. The term "endoscope" refers to any medical device having a flexible tubular probe 14 for insertion into a patient 16 to visually explore the patient's internal tissues and cavities, and to introduce water, air, or other fluids as needed. Some exemplary endoscopes 10 have an internal wire 18 that is tension-adjustable to bend and steer the flexible tubular probe 14. Figure 1 Some examples of the endoscopes 10 shown include duodenoscopes, colonoscopes, ureteroscopes, bronchoscopes, laparoscopes, sheaths, and catheters.

[0067] Using endoscope 10 as an example, many of the components listed below are optional. Some examples of endoscope 10 include components such as a handle body 20, a flexible tubular probe 14 extending from the handle body 20, a dual-fluid valve 12 (e.g., dual-fluid valves 12a-12f) for controlling the flow of fluids 22 (e.g., liquid 22a and gas 22b), a steering knob 24 for adjusting the tension in the internal filament 18, a locking lever 26 for locking the position of the steering knob 24, a biopsy port 28 for collecting and aspirating tissue or fluid, a control unit 30, an umbilical tube 32 connecting the control unit 30 to the handle body 20, and an image capture button 34, etc.

[0068] The control unit 30 provides a variety of functions. Some examples of such functions include supplying liquid 22a (e.g., water), supplying gas 22b (e.g., air), sending and receiving electrical signals, processing electrical signals, providing a vacuum source, etc. Some of the functions of the control unit listed here are optional. The umbilical tube 32 connects the control unit 30 to the dual-fluid valve 12, the flexible tubular probe 14, or other endoscope-related components in a signal-communication or fluid-communication manner.

[0069] In some examples, the flexible tubular probe 14 includes multiple components, such as an internal wire 18 for steering, conduit 36 ​​(one or more tubes) for conveying fluid 22, fiber optic cable 38 for conveying images or light, and wire 40 for conveying power or electrical signals. Some of these probe components are optional.

[0070] The flexible tubular probe 14 has a proximal end 42 and a distal end 44. The proximal end 42 is connected to the handle body 20, and the distal end 44 extends away from the handle body 20. At the distal end 44, some examples of the flexible tubular probe 14 include a light source 46 (or a fiber optic cable leading to the light source) for illuminating the patient's internal lumen, a camera 48 (or a fiber optic cable leading to the camera), an end 48 of tubing 36, and a lifting element 50 for tilting the end 48 of tubing 36. The lifting element 50 may also be referred to as a swing frame, pivot frame, or lifting bed. The end 48 of tubing 36 is open to allow fluid 22 to pass through for blowing, flushing, or biopsy sampling.

[0071] Air blowing and flushing can be controlled by various examples of dual-fluid valves 12 (e.g., dual-fluid valves 12a-12f). Figures 2 to 4 In the example shown, the dual-fluid valve 12a includes a valve housing 52a and a valve core 54. As... Figures 2 to 4 As shown, the valve housing 52a is supported by the handle body 20. Since the valve housing 52a can be connected in any manner at any position and orientation relative to the handle body 20, the means of support are schematically shown. In some examples, the valve housing 52a is a seamless, integral extension of the handle body 20.

[0072] Valve housing 52a is shown as a seamless, monolithic piece (i.e., a single component rather than a component assembly); however, other examples of valve housing 52a include multiple components. In some examples, the multiple components are interconnected to form an assembly. In some examples, the multiple components are separate from and spaced apart from each other. In some examples, valve core 54 is made of metal (e.g., stainless steel, brass, aluminum, etc.), while valve housing 52a is made of polymer, such as nylon, PEEK (polyetheretherketone), POM (polyoxymethylene, polyacetal, Delrin, Celcon, etc.), POM-C (polyoxymethylene copolymer), and POM-H (polyoxymethylene homopolymer). This combination of metal and polymer materials provides a precise fit and low friction between valve core 54 and valve housing 52a.

[0073] exist Figures 2 to 4 In the example shown, valve core 54 includes a first portion 54a and a second portion 54b. The second portion 54b at least partially defines a liquid passage 56. The first portion 54b at least partially defines a gas passage 58. Valve housing 52a defines or otherwise provides a liquid inlet 60a, a liquid outlet 62a, a gas inlet 64a, and a gas outlet 66a.

[0074] The terms inlet and outlet refer to openings through which fluid can pass. The valve body providing an inlet or outlet means that the valve body has openings through which fluid can pass; however, the fluid does not necessarily have to contact the valve body or the inner wall of the opening. For example, in some examples, such as... Figures 8 to 33As shown, a pipe for conveying fluid may extend through an inlet opening located in the valve housing, allowing fluid to flow through the pipe and come into contact with the inner wall of the pipe. Of course, the fluid flowing through the pipe also passes through the inlet opening located in the valve housing, but does not actually come into contact with the inner wall of the valve housing.

[0075] The liquid inlet 60a of the valve housing 52a receives liquid 22a (e.g., water) from the control unit 30 via the umbilicus 32. The piping 36 within the flexible tubular probe 14 connects the liquid outlet 62a to the distal end 44 of the probe.

[0076] The gas inlet 64a of the valve housing 52a receives gas 22b (e.g., air) from the control unit 30 via the umbilical tube 32. A gas outlet 66a is connected to discharge gas 22b through the flexible tubular probe 14 to the distal end 44 of the probe.

[0077] In order to control the flow of liquid 22a through the flexible tubular probe 14, the valve core 54 can be in the closed position within the valve housing 52a. Figure 2 and Figure 3 ) and rinsing location ( Figure 4 The valve core 54 moves between the two fluid passages 60a and 62b. In some examples, the spring 68 pushes the valve core 54 to the closed position. In the closed position, the fluid passage 56 is misaligned with the fluid inlet 60a and fluid outlet 62b, causing the valve core 54 to block fluid flow through the dual-fluid valve 12a.

[0078] To initiate fluid flow, the user 70 (e.g., a medical professional) presses the valve core 54, aligning the fluid passage 56 with the fluid inlet 60a and the fluid outlet 60b, thereby placing the valve core 54 in the flushing position. Figure 4 At the flushing position, liquid 22a flows sequentially from liquid inlet 60a through liquid passage 56, liquid outlet 62a, tubing 36 within the flexible tubular probe 14, and into the patient 16. In some examples, such as Figure 4 As shown, the user 70 moves the valve core 54 to the flushing position by pressing their finger on the button head 72 of the valve core 54. The term "button head" refers only to the part accessible to the user 70 for controlling valve operation. Figures 2 to 4 In the middle, the button head 72 is the exposed end of the valve core 54.

[0079] In some examples, the dual-fluid valve 12a can also be selectively configured as a discharge configuration. Figure 2 ) and blowing configuration ( Figure 3In the discharge configuration, the discharge port 74, which passes through the button head 72 of the valve core 54, is not covered and is in an open state, thereby fluidly connecting the gas passage 58 to the atmosphere 76. When the gas passage 58 is discharged to the atmosphere 76, the gas 22b from the gas inlet 64a tends to escape through the discharge port 74 rather than flow through the gas outlet 66a and the piping 36 in the flexible tubular probe 14.

[0080] In order to blow in or promote the flow of gas 22b to the patient 16, such as Figure 3 As shown, the user 70 can cover the discharge port 74. This puts the dual-fluid valve 12a in its puff configuration. When the discharge port 74 is covered and the valve core 54 is in the closed position, as... Figure 3 As shown, the gas 22b from the gas inlet 64a cannot escape through the exhaust hole 74. Therefore, the gas 22b from the gas inlet 64a flows sequentially through the gas passage 58, the gas outlet 66a, and the piping 36 in the flexible tubular probe 14, and enters the patient 16.

[0081] although Figure 4 The diagram shows that the discharge port 74 is covered, but the dual-fluid valve 12a is not in the blowing configuration because the valve core 54 is depressed, which causes the gas passage 58 to be misaligned with the valve inlet 64a and the valve outlet 66a. Therefore, the valve core 54 is... Figure 4 The position shown will block the flow of gas 22b through the dual-fluid valve 12a.

[0082] In some examples, such as Figures 2 to 4 As shown, the outer diameter of the first portion 54a of the valve core 54 is larger than that of the second portion 54b. During the manufacturing of the valve core 54, the turning operation on the lathe may cause undesirable runout (roundness defects) in the relatively long workpiece that protrudes from the lathe jaws. This problem can be minimized by turning the second portion 54b of the valve core 54 with a smaller diameter.

[0083] Similar to the dual-fluid valve 12a, Figures 5 to 7 The illustrated dual-fluid valve 12b includes a valve housing 52b supported by a handle body 20, wherein the valve housing 52b defines or additionally provides a liquid inlet 60b, a liquid outlet 62b, a gas inlet 64b, and a gas outlet 66b. Although Figures 2 to 4 The gas passage 58 and liquid passage 56 of the dual-fluid valve 12a shown pass radially through the valve core 54, but... Figures 5 to 7 The dual-fluid valve 12b is shown to have a gas passage 78 and a liquid passage 80 extending circumferentially around a valve core 82. A vent 74 is in fluid communication with the gas passage 78. By directing the gas passage 78 and liquid passage 80 circumferentially rather than radially, relatively high local pressure areas are reduced, thereby minimizing leakage. The functions of dual-fluid valves 12a and 12b correspond to... Figure 2 , Figure 3 and Figure 4 of Figure 5 , Figure 6 and Figure 7 same.

[0084] although Figures 5 to 7 The valve core 82 shown does not have a stepped diameter to minimize runout, but this problem can be minimized by machining the valve core 82 on a Swiss lathe. Unlike a workpiece supported in an overhanging manner by a chuck on a more general-purpose lathe, a Swiss lathe has a bushing for supporting the workpiece radially, precisely near the location where metal removal occurs. During cutting, the workpiece can slide axially along the bushing, so the cutting force acts near the bushing, rather than further downwards along the length of the overhanging workpiece.

[0085] Figures 8 to 12 An exemplary dual-fluid valve 12c is shown, which includes a valve housing 52c supported by a handle body 20 and provides a liquid inlet 60c, a liquid outlet 62c, a gas inlet 64c, and a gas outlet 66c. In some examples, the liquid inlet 60c of the valve housing 52c receives liquid 22a from a control unit 30 via an umbilical tube 32. In some examples, tubing 36 within a flexible tubular probe 14 connects the liquid outlet 62c to a distal probe end 44. In some examples, the tubing 36 passing through the flexible tubular probe 14 also extends through the liquid inlet 60c and the liquid outlet 62c of the valve housing 52c.

[0086] In some examples, the valve housing 52c includes a first portion 84 for handling liquid 22a and a second portion 86 for handling gas 22b. In some examples, the first portion 84 and the second portion 86 are combined into a seamless integral part. In some examples, the first portion 84 and the second portion 86 are discrete interconnected parts. In some examples, the first portion 84 and the second portion 86 are separate and spaced apart.

[0087] In some examples of endoscope 10, such as in Figure 11 and Figure 12 The diagram schematically shows that the first portion 84 of the valve housing 52c is supported by the handle body 20. In some examples, the valve housing 52c includes a flexible tube 88, a clamping element 90, and a compression spring 92.

[0088] In some examples, the flexible tube 88 extends between the liquid inlet 60c and the liquid outlet 62c. In some examples, the flexible tube 88 is a seamless integrated component that passes through the flexible tubular probe 14 and / or through the piping 36 of the umbilical tube 32. This eliminates joints and potential leakage points.

[0089] In other examples, the flexible tube 88 is a relatively short segment 94 having a first connector 96 connecting the flexible tube 88 to the inlet conduit 98 and a second connector 100 connecting the flexible tube 88 to the outlet conduit 102. The short segment 94 can be designed with physical and material properties that make the flexible tube 88 more durable and more resistant to repeated deformation, while the inlet conduit 98 and outlet conduit 102 can be fabricated to be more suitable for use with the relatively long flexible piping probe 14.

[0090] In some examples, the outlet conduit 102 is a conduit 36 ​​that passes through the flexible tubular probe 14. In some examples, the inlet conduit 98 passes through the umbilicus 32. Whether the flexible tube 88 is a short segment connecting the inlet conduit 98 and the outlet conduit 102, or a seamlessly integrated component of the conduit 36 ​​that passes through the flexible tubular probe 14, the flexible tube 88 can be deformed into various shapes. Figure 11 and a looser shape () Figure 12 Deformation occurs between ) and when the flexible tube 88 is in a more relaxed shape ( Figure 12 Compared to when the flexible tube 88 is in a deformed shape, Figure 11 When flexible tube 88 is used, it provides stronger flow restriction through it.

[0091] To move the flexible tube 88 from its deformed shape to its more relaxed shape, thereby opening the valve, the user 70 can press on the button head 104 of the clamping member 90. This moves the clamping member 90 from the closed position ( Figure 11 Move to the rinsing position. Figure 12 ).

[0092] In some examples, such as Figure 11 As shown, when the user 70 releases the button head 104, the compression spring 92 pushes the clamp 90 back to the closed position. In other examples, without the compression spring 92, the elasticity of the valve housing 52c itself pushes the clamp 90 to its closed position. In some examples, the clamp 90 is seamlessly integrated into the valve housing 52c, and the elastic flexible portion of the valve housing 52c allows the clamp 90 to remain in the closed position ( Figure 11 ) and rinsing location ( Figure 12 Move between ).

[0093] As for the second part 86 of the valve housing 52c, the gas inlet 64c receives gas 22b from the control unit 30 via the umbilicus 32. The gas passage 106 fluidly connects the gas inlet 64c to the gas outlet 66c. The gas outlet 66c is connected to discharge gas 22b through the flexible tubular probe 14 to the distal end 44 of the probe.

[0094] In some examples, the vent 108 connects the gas passage 106 to the atmosphere 76. The user 70 can cover or expose the vent 108, allowing the dual-fluid valve 12c to be selectively configured in a vent configuration. Figure 8 and Figure 9 ) and blowing configuration ( Figure 10 In the discharge configuration, gas 22b from gas inlet 64c tends to escape through discharge port 108 rather than flowing through gas outlet 66c and piping 36 in flexible tubular probe 14.

[0095] In order to blow in or promote the flow of gas 22b to the patient 16, such as Figure 10 As shown, the user 70 can cover the discharge port 108. This puts the dual-fluid valve 12c in its blowing configuration. When the discharge port 108 is covered, the gas 22b tends to flow sequentially from the gas inlet 64c through the gas passage 106, the gas outlet 66c, the tubing 36 in the flexible tubular probe 14, and into the patient 16.

[0096] Figures 13 to 19 An exemplary dual-fluid valve 12d is shown, which includes a valve housing 52d supported by a handle body 20. Since the valve housing 52d can be connected in any manner at any position and orientation relative to the handle body 20, the means for support are schematically shown. In some examples, the valve housing 52d is a seamless, integral extension of the handle body 20.

[0097] In some examples, the valve housing 52d includes a clamping member 110, a pressure plate 112, at least one spring member 114, and a flexible tube 116 disposed between the clamping member 110 and the pressure plate 112. In some examples, the valve housing 52d defines or additionally provides a liquid inlet 60d and a liquid outlet 62d, both located between the clamping member 110 and the pressure plate 112. The liquid inlet 60d is connected to the umbilical tube 32 to receive liquid 22a from the control unit 30, and the liquid outlet 62d is fluidly connected to the flexible tubular probe 14 to deliver liquid 22a to the distal end 44 of the probe.

[0098] In some examples, the flexible tube 116 positioned between the clamping member 110 and the pressure plate 112 is an integral extension of the piping 36 passing through the flexible tubular probe 14 and / or an integral extension of the piping passing through the umbilicus 32, thereby minimizing the number of piping joints and potential leak points. In some examples, the flexible tube 116 positioned between the clamping member 110 and the pressure plate 112 is a relatively short, more durable segment, which, along with, Figure 11 and Figure 12 The short segment 94 shown is similar.

[0099] The flexibility of the spring member 114 allows the clamping member 110 to be in the closed position. Figures 13 to 17) and rinsing location ( Figure 18 and Figure 19 The flexible tube 116 moves elastically between the clamping member 110 and the flushing position. In response to the movement of the clamping member 110 between the off position and the flushing position, the flexible tube 116 deforms into different shapes. Figures 13 to 17 and a looser shape () Figure 18 and Figure 19 The flexible tube 116 deforms between the two fluid valves. When the flexible tube 116 is in the flushing position and has a more relaxed shape, the liquid 22a can flow through the two-fluid valve 12d. When the flexible tube 116 is deformed and in the closed position, the two-fluid valve 12d blocks the flow of liquid 22a.

[0100] In order to open the liquid portion of the dual-fluid valve 12d to the flushing position, the user 70 moves the valve housing 52d from... Figure 16 and Figure 17 Compress the position shown to Figure 18 and Figure 19 The position is shown. The flexible portion of the spring member 114 moves the clamping member 110 away from the pressure plate 112, thereby creating a gap between them in which the flexible tube 116 can relax and be opened by radial expansion.

[0101] To close the liquid portion of the dual-fluid valve 12d to the shut-off position, the user 70 only needs to release the manual pressure on the valve housing 52d. Figure 14 and Figure 15 As shown, when the pressure from the user 70 is removed, the elasticity of the spring member 114 will push the valve housing 52d back to its normal closed position.

[0102] In some examples, the valve housing 52d also defines or additionally provides a gas inlet 64d, a gas outlet 66d, and a vent 118. To supply gas 22b to the valve housing 52d, an umbilical 32 connects the gas inlet 64d to the control unit 30. A gas passage 120 fluidly connects the gas inlet 64d to the gas outlet 66d. The gas outlet 66d is connected to vent gas 22b through a flexible tubular probe 14 to the distal end 44 of the probe.

[0103] In some examples, the vent 118 connects the gas passage 120 to the atmosphere 76. The user 70 can cover or expose the vent 118, allowing the dual-fluid valve 12d to be selectively configured in a vent configuration. Figures 13 to 15 ) and blowing configuration ( Figures 16 to 19 In the discharge configuration, gas 22b from gas inlet 64d tends to escape through discharge port 118 rather than flowing through gas outlet 66d and piping 36 in flexible tubular probe 14. Figures 14 to 19As shown, when the discharge port 118 and the gas passage 120 are arranged in a more tortuous pattern, the tendency for gas 22b to escape through the open discharge port 118 becomes even greater.

[0104] like Figures 16 to 19 As shown, in order to blow in or promote the flow of gas 22b to the patient 16, the user 70 can cover the discharge port 118. This puts the dual-fluid valve 12d in its blowing configuration. When the discharge port 118 is covered, gas 22b tends to flow sequentially from the gas inlet 64d through the gas passage 120, the gas outlet 66d, the tubing 36 in the flexible tubular probe 14, and into the patient 16.

[0105] Figures 20 to 26 An exemplary dual-fluid valve 12e is shown, which includes a valve housing 52e supported by a handle body 20. Since the valve housing 52e can be connected in any manner at any position and orientation relative to the handle body 20, the means for support are schematically shown. In some examples, the valve housing 52e is a seamless, integral extension of the handle body 20.

[0106] In some examples, the valve housing 52e includes a clamping member 110, a pressure plate 112, at least one spring member 114, and a flexible tube 116 disposed between the clamping member 110 and the pressure plate 112. In some examples, the valve housing 52e defines or additionally provides a liquid inlet 60e and a liquid outlet 62e, both located between the clamping member 110 and the pressure plate 112. The liquid inlet 60e is connected to the umbilical tube 32 to receive liquid 22a from the control unit 30, and the liquid outlet 62e is fluidly connected to the flexible tubular probe 14 to deliver liquid 22a to the distal end 44 of the probe.

[0107] In some examples, the flexible tube 116 positioned between the clamp 110 and the pressure plate 112 is an integral extension of the piping 36 passing through the flexible tubular probe 14 and / or the piping passing through the umbilicus 32, thereby minimizing the number of piping joints and potential leak points. In some examples, the flexible tube 116 positioned between the clamp 110 and the pressure plate 112 is a relatively short, more durable segment, which, along with... Figure 11 and Figure 12 The segment shown is similar to 94.

[0108] The flexibility of the spring member 114 allows the clamping member 110 to be in the closed position. Figures 20 to 24 ) and rinsing location ( Figure 25 and Figure 26 The flexible tube 116 moves elastically between the clamping member 110 and the flushing position. In response to the movement of the clamping member 110 between the off position and the flushing position, the flexible tube 116 deforms into different shapes. Figures 20 to 24 and a looser shape () Figure 25 and Figure 26 The flexible tube 116 deforms between the two fluid valves. When the flexible tube 116 is in a more relaxed shape and in the flushing position, the liquid 22a can flow through the two-fluid valve 12e. When the flexible tube 116 is in a deformed shape and in the closed position, the two-fluid valve 12e blocks the flow of liquid 22a.

[0109] In order to open the liquid portion of the dual-fluid valve 12e to the flushing position, the user 70 moves the valve housing 52e from... Figure 23 and Figure 24 Compress the position shown to Figure 25 and Figure 26 The position is shown. The flexible portion of the spring member 114 moves the clamping member 110 away from the pressure plate 112, thereby creating a gap between them, through which the flexible tube 116 can relax and be opened by radial expansion.

[0110] To close the liquid portion of the dual-fluid valve 12e to the shut-off position, the user 70 simply needs to release the manual pressure on the valve housing 52e. For example... Figure 21 and Figure 22 As shown, when the pressure from the user 70 is removed, the elasticity of the spring member 114 will push the valve housing 52e back to its normal closed position.

[0111] In some examples, the valve housing 52e also defines or additionally provides a gas inlet 64e, a gas outlet 66e, and a vent 122. To supply gas 22b to the valve housing 52e, an umbilical 32 connects the gas inlet 64e to the control unit 30. A gas passage 124 fluidly connects the gas inlet 64e to the gas outlet 66e. The gas outlet 66e is connected to discharge gas 22b through a flexible tubular probe 14 to the distal end 44 of the probe.

[0112] In some examples, the vent 122 connects the gas passage 124 to the atmosphere 76. The user 70 can cover or expose the vent 122, allowing the dual-fluid valve 12e to be selectively configured in a vent configuration. Figures 20 to 22 ) and blowing configuration ( Figures 23 to 26 In the discharge configuration, gas 22b from gas inlet 64e tends to escape through discharge port 122 rather than flowing through gas outlet 66e and piping 36 in flexible tubular probe 14. Figures 21 to 26 As shown, when the relative orientations of the gas inlet 64e and the gas outlet 66e are both angularly offset (not parallel) and laterally offset (not collinear) relative to the direction through which the gas flows, the tendency of gas 22b to escape through the open discharge port 122 becomes even greater.

[0113] like Figures 23 to 26As shown, in order to blow in or promote the flow of gas 22b to the patient 16, the user 70 can cover the discharge port 122. This puts the dual-fluid valve 12e in its blowing configuration. When the discharge port 122 is covered, gas 22b tends to flow sequentially from the gas inlet 64e through the gas passage 124, the gas outlet 66e, the tubing 36 in the flexible tubular probe 14, and into the patient 16.

[0114] Figures 27 to 33 An exemplary dual-fluid valve 12f is shown, which includes a valve housing 52f supported by a handle body 20. Since the valve housing 52f can be connected in any manner at any position and orientation relative to the handle body 20, the means for support are schematically shown. In some examples, the valve housing 52f is a seamless, integral extension of the handle body 20.

[0115] In some examples, the valve housing 52f includes a clamping member 126, a pressure plate 128, at least one spring member 130, and a flexible tube 116 positioned between the clamping member 126 and the pressure plate 128. In some examples, the valve housing 52f defines or additionally provides a liquid inlet 60f and a liquid outlet 62f, both located between the clamping member 126 and the pressure plate 128. The liquid inlet 60f is connected to the umbilical tube 32 to receive liquid 22a from the control unit 30, and the liquid outlet 62f is fluidly connected to the flexible tubular probe 14 to deliver liquid 22a to the distal end 44 of the probe.

[0116] In some examples, the flexible tube 116 positioned between the clamp 126 and the pressure plate 128 is an integral extension of the piping 36 passing through the flexible tubular probe 14 and / or an integral extension of the piping passing through the umbilical tube 32, thereby minimizing the number of piping joints and potential leak points. In some examples, the flexible tube 116 positioned between the clamp 126 and the pressure plate 128 is a relatively short, more durable segment, which, along with, such as Figure 11 and Figure 12 The segment shown is similar to 94.

[0117] In some examples, the valve body 52f is elastically flexible, and the spring member 130 is a seamless integral part of the valve body 52f itself. The flexibility of the spring member 130 allows the clamping member 126 to be in the closed position ( Figures 27 to 31 ) and rinsing location ( Figure 32 and Figure 33 The flexible tube 116 moves elastically between the clamping member 126 and the flushing position in response to the movement of the clamping member 126 between the closed position and the flushing position. Figures 27 to 31 and a looser shape () Figure 32 and Figure 33The flexible tube 116 deforms between the two fluid valves. When the flexible tube 116 is in a more relaxed shape and in the flushing position, the liquid 22a can flow through the two-fluid valve 12f. When the flexible tube 116 is in a deformed shape and in the closed position, the two-fluid valve 12f blocks the flow of liquid 22a.

[0118] In order to open the liquid portion of the dual-fluid valve 12f to the flushing position, the user 70 moves the valve housing 52f from... Figure 28 and Figure 29 Compress the position shown to Figure 32 and Figure 33 The position is shown. The flexible portion of the spring member 130 moves the clamping member 126 away from the pressure plate 128, thereby creating a gap between them, through which the flexible tube 116 can relax and be opened by radial expansion.

[0119] To close the liquid portion of the dual-fluid valve 12f to the shut-off position, the user 70 simply needs to release the manual pressure on the valve housing 52f. For example... Figure 28 and Figure 29 As shown, when the pressure from the user 70 is removed, the elasticity of the spring member 130 will push the valve housing 52f back to its normal closed position.

[0120] In some examples, the valve housing 52f also defines or additionally provides a gas inlet 64f, a gas outlet 66f, and a vent 132. To supply gas 22b to the valve housing 52f, an umbilical 32 connects the gas inlet 64f to the control unit 30. A gas passage 134 fluidly connects the gas inlet 64f to the gas outlet 66f. The gas outlet 66f is connected to vent gas 22b through a flexible tubular probe 14 to the distal end 44 of the probe.

[0121] In some examples, the vent 132 connects the gas passage 134 to the atmosphere 76. The user 70 can cover or expose the vent 132, allowing the dual-fluid valve 12f to be selectively configured in a vent configuration. Figures 27 to 29 , Figure 32 and Figure 33 ) and blowing configuration ( Figures 30 to 31 In the discharge configuration, gas 22b from gas inlet 64f tends to escape through discharge port 132 rather than flowing through gas outlet 66f and piping 36 in flexible tubular probe 14.

[0122] like Figure 30 and Figure 31As shown, in order to blow in or promote the flow of gas 22b to the patient 16, the user 70 can cover the discharge port 132. This puts the dual-fluid valve 12f in its blowing configuration. When the discharge port 132 is covered, gas 22b tends to flow sequentially from the gas inlet 64f through the gas passage 134, the gas outlet 66f, the tubing 36 in the flexible tubular probe 14, and into the patient 16.

[0123] Figure 34 Some example method steps are shown for using endoscope 10 in various ways. Figure 34 The steps shown do not need to be performed in any particular order, and not all steps must be performed. Step block 136 represents inserting the flexible tubular probe 14 into the patient 16. Step block 138 represents selectively injecting gas 22b and liquid 22a into the patient 116 through the flexible tubular probe 14. Step block 140 represents clamping the deformable tube (e.g., deformable tube 88 or 116) to reduce the flow rate of liquid 22a delivered to the patient 16. Step block 142 represents manually blocking the drain holes (e.g., drain holes 74, 108, 118, 122, or 132) to increase the flow rate of gas 22b delivered to the patient 16. Step block 144 represents bending the elastic flexible valve housing (e.g., valve housings 52c to 52f) to increase the liquid flow rate.

[0124] This disclosure should not be construed as limited to the examples described above. It will be apparent to those skilled in the art, upon reading this specification, that various improvements, equivalent processes, and multiple structures to which this disclosure applies can be implemented.

Claims

1. An endoscope for a patient, comprising: handle body; A valve housing supported by a handle body, the valve housing providing a liquid inlet, a liquid outlet, a gas inlet, and a gas outlet; A valve core having a first portion and a second portion, the first portion at least partially defining a gas passage and the second portion at least partially defining a liquid passage, the valve core being selectively movable relative to the valve housing to a closed position and a flushing position, the valve core combined with the valve housing providing a dual-fluid valve selectively configured as a discharge configuration and a blow configuration; When the valve core is in the flushing position, the liquid passage connects the liquid inlet and the liquid outlet in fluid communication; when the dual-fluid valve is in the blowing configuration, the gas passage connects the gas inlet and the gas outlet in fluid communication. as well as A flexible tubular probe having a proximal end attached to the handle body and a distal end insertable into a patient, the flexible tubular probe fluidly connecting the liquid outlet and the gas outlet to the distal end.

2. The endoscope according to claim 1, wherein the diameter of the first portion is larger than that of the second portion.

3. The endoscope according to claim 1 or claim 2, wherein the gas passage and the liquid passage extend circumferentially around the valve core.

4. The endoscope according to any one of claims 1, 2, or 3, further comprising a button head located on the valve core, wherein the valve core and the button head define a discharge port, wherein when the discharge port is covered and the valve core is in the closed position, the dual-fluid valve is in the blowing configuration; when the discharge port is open, the dual-fluid valve is in the discharge configuration, wherein when the dual-fluid valve is in the discharge configuration, the discharge port fluidly connects the gas passage to the atmosphere, and when the dual-fluid valve is in the blowing configuration, the discharge port is covered and fluid flow through the discharge port into the atmosphere is inhibited.

5. The endoscope according to any one of claims 1 to 4, wherein the valve core in the flushing position blocks fluid communication between the gas inlet and the gas outlet.

6. The endoscope according to any one of claims 1 to 5, wherein the valve core in the closed position blocks fluid communication between the liquid inlet and the liquid outlet.

7. The endoscope according to any one of claims 1 to 6, wherein the gas passage and the liquid passage pass through the valve core.

8. The endoscope according to any one of claims 1 to 7, further comprising a spring that pushes the valve core to the closed position.

9. The endoscope according to any one of claims 1 to 8, wherein the valve core is made of metal and the valve housing is made of polymer.

10. An endoscope used by a user for a patient, comprising: handle body; A valve housing supported by the handle body, the valve housing providing a liquid inlet, a liquid outlet, a gas inlet, and a gas outlet; A flexible tube connecting the liquid inlet to the liquid outlet is deformable between a deformable shape and a more relaxed shape, wherein the flexible tube provides a stronger flow restriction when it is in the deformable shape compared to when it is in the more relaxed shape. The clamping member engages the flexible tube and is movable between a shut-off position and a flushing position. In the shut-off position, the clamping member forces the flexible tube to the deformed shape, and in the flushing position, the clamping member restores the flexible tube to the more relaxed shape. as well as A flexible tubular probe having a proximal end attached to the handle body and a distal end insertable into the patient, the flexible tubular probe fluidly connecting the liquid outlet and the gas outlet to the distal end.

11. The endoscope of claim 10, further comprising: Inlet pipe; A water outlet conduit extends through the flexible tubular probe; The first connector connects the water inlet conduit to the flexible tube at the water inlet. as well as The second connector connects the water outlet conduit to the flexible tube at the water outlet.

12. The endoscope of claim 10 or 11, wherein the resilient flexible portion of the valve housing allows the clamping member to move between the closed position and the flushing position.

13. The endoscope according to any one of claims 10, 11 or 12, wherein the elasticity of the valve housing pushes the clamping member to the closed position.

14. The endoscope according to any one of claims 10 to 13, wherein the clamping member is seamlessly integrated into the valve housing, and the resilient flexible portion of the valve housing allows the clamping member to move between the closed position and the flushing position.

15. The endoscope of any one of claims 10 to 14, wherein the valve housing, combined with the flexible tube and the clamping member, provides a dual-fluid valve, the valve housing providing a gas passage between the gas inlet and the gas outlet, the valve housing defining a discharge port fluidly connected to the gas passage, the discharge port being selectively covered and exposed by the user, the discharge port being in a blowing configuration when covered, and in a discharge configuration when exposed, the discharge port fluidly connecting the gas passage to the atmosphere when the dual-fluid valve is in the discharge configuration, and the discharge port being covered and preventing fluid from flowing through the discharge port into the atmosphere when the dual-fluid valve is in the blowing configuration.

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