Endoscope vacuum valve with strategic relative port size

Abstract

The present disclosure relates to an aspiration valve for an endoscope, such as a duodenoscope, that includes a valve housing with strategically sized opposing ports to provide a venting configuration and an aspiration configuration. In the aspiration configuration, the endoscope delivers suction to a distal end of a flexible tubular probe of the endoscope. In the venting configuration, the suction is mostly closed off at the distal end. The valve housing has a suction source opening to a vacuum pump, a venting opening that can be open to atmosphere, and a probe opening to a suction tube in the flexible tubular probe. In some examples, the suction source opening is larger than the venting opening, which in turn is larger than the probe opening. When so sized, the aspiration valve can switch between the venting configuration and the aspiration configuration without relying on any moving parts. An operator can switch into the aspiration configuration by simply covering the venting opening.

Description

Cross-references to related applications

[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 63 / 605,202, filed December 1, 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 suction valves for use in endoscopes. Background Technology

[0003] Endoscopy allows medical professionals to directly observe a patient's internal cavities without invasive surgery. Among various types of endoscopes, the duodenoscope holds a prominent position due to its ability to explore the upper digestive tract, particularly the duodenum, pancreas, and bile ducts. The duodenoscope not only facilitates visual examination but also enables a range of surgical procedures, making it an indispensable tool in modern medicine.

[0004] A duodenoscopy typically consists of a flexible tubular probe extending from a handle body. The probe is inserted into the patient while the operator holds the handle body. A light source at the distal end of the probe provides illumination for observation. Typically, a high-resolution camera is adjacent to the light source to capture images or video of the lumen in real time.

[0005] Duodenoscope probes typically include an internal 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 wiring. The tension in the wiring can be adjusted in two opposing ways by manipulating knobs on the duodenoscope's handle. Adjusting the wiring tension allows the probe to bend and steer.

[0006] The handle body typically includes a dual-fluid valve (air / water valve) and a suction valve, which are manually controlled by the operator. The dual-fluid valve can be used to control the flow of fluids, such as air for blowing and water for rinsing. Blowing involves introducing air or carbon dioxide into the cavity to be inspected, thereby helping to expand the space and allowing for better visibility of the target area.

[0007] Irrigation typically involves the introduction of a fluid, such as sterile water or saline. Irrigation helps remove blood, debris, or mucus from the field of vision, ensuring a clear view. Irrigation can also assist therapeutic interventions by irrigating the target area, thereby improving tissue access and manipulation.

[0008] The operator uses the suction valve on the handle body to apply or terminate suction at the distal end of the probe. The suction valve typically includes a spool that can be manually moved between an open and closed position. When open, the applied suction draws fluid, tissue, or other material back through the suction cannula within the probe, thereby clearing the probe's field of view. Moving the spool to the closed position terminates suction. Suction valves typically include a spring for advancing the spool to its closed position. Summary of the Invention

[0009] This disclosure generally relates to a suction valve for controlling fluid flow through an endoscope, the endoscope including a flexible tubular probe extending from a handle body. In some examples, the endoscope may be connected to a suction source. In some examples, the suction valve may be selectively configured in a suction configuration and a venting configuration. Some examples of the suction valve include a valve housing supported by the handle body. Some examples of the suction valve include a probe opening having a first flow coefficient. In some examples, the probe opening is fluidly connected to the flexible tubular probe. In some examples, the probe opening is at least partially defined by the valve housing. Some examples of the suction valve include a venting opening having a second flow coefficient. In some examples, when the suction valve is in the venting configuration, the venting opening is in fluid communication with the ambient atmosphere. In some examples, the venting opening is at least partially defined by the valve housing. In some examples, the venting opening is selectively open and closed. In some examples, the suction valve is in the venting configuration when the venting opening is open. In some examples, the suction valve is in the suction configuration when the vent is closed. Some examples of the suction valve further include a suction source opening having a third flow coefficient. In some examples, the suction source opening is fluidly connected to a suction source. In some examples, the suction source opening is defined by the valve housing. In some examples, the second flow coefficient is greater than the first flow coefficient and less than the third flow coefficient. In some examples, when the vent is open in the vent configuration, a majority of the fluid flowing through the suction valve flows from the vent to the suction source opening. In some examples, when the vent is closed in the suction configuration, a majority of the fluid flowing through the suction valve flows from the probe opening to the suction source opening.

[0010] In some examples, the suction valve includes a valve housing supported by the handle body. Some examples of the suction valve include a probe opening fluidly connected to the flexible tubular probe. In some examples, the probe opening has a first size and is at least partially defined by the valve housing. Some examples of the suction valve further include a vent opening that is fluidly connected to the surrounding atmosphere when the suction valve is in the venting configuration. In some examples, the vent opening has a second size and is at least partially defined by the valve housing. In some examples, the vent opening is selectively openable and closed. In some examples, the suction valve is in the venting configuration when the vent opening is open. In some examples, the suction valve is in the suction configuration when the vent opening is closed. Some examples of the suction valve also include a suction source opening fluidly connected to the suction source. In some examples, the suction source opening has a third size and is at least partially defined by the valve housing. In some examples, the second size is larger than the first size and smaller than the third size. In some examples, when the vent opening is open in the vent configuration, most of the fluid flowing through the suction valve flows from the vent opening to the suction source opening. In some examples, when the vent opening is closed in the suction configuration, most of the fluid flowing through the suction valve flows from the probe opening to the suction source opening.

[0011] In some examples, the suction valve system includes a handle body of an endoscope. Some examples of the suction valve system include a valve housing supported by the handle body. In some examples, the valve housing at least partially defines a probe opening, a venting opening, and a suction source opening. In some examples, the probe opening is in fluid communication with both the suction source opening and the venting opening in both the suction configuration and the venting configuration. In some examples, the venting opening is selectively open and closed. In some examples, the suction valve system is in the suction configuration when the venting opening is closed. In some examples, the suction valve system is in the venting configuration when the venting opening is open, wherein the venting opening is in fluid communication with the ambient atmosphere. In some examples, the probe opening has a first flow coefficient. In some examples, the venting opening has a second flow coefficient when it is open. In some examples, the suction source opening has a third flow coefficient. In some examples, the second flow coefficient is greater than the first flow coefficient and less than the third flow coefficient. In some examples, when the vent opening is open in the vent configuration, a majority of the fluid flowing through the suction valve system flows from the vent opening to the suction source opening. In some examples, when the vent opening is closed in the suction configuration, a majority of the fluid flowing through the suction valve flows from the probe opening to the suction source opening. Some examples of the suction valve system also include an umbilical tube attached to the handle body to connect the suction source to the suction source opening of the valve housing. Some examples of the suction valve system further include a flexible tubular probe attached to the handle body. Some examples of the suction valve system include a suction tube attached to the valve housing at the probe opening and extending through the flexible tubular probe.

[0012] 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. Attached Figure Description

[0013] Figure 1 This is a perspective view of an exemplary endoscope with a suction valve that incorporates multiple aspects of this disclosure.

[0014] Figure 2 It is along Figure 1 The cross-sectional view taken from line 2-2 shows the suction valve 4 in the ventilated configuration.

[0015] Figure 3 Is with Figure 2 A similar cross-sectional view, but showing the suction valve in a suction configuration.

[0016] Figure 4 Is with Figure 2A similar cross-sectional view, but showing another example of a suction valve in a venting configuration.

[0017] Figure 5 Is with Figure 4 Similar cross-sectional view, but showing the suction valve in suction configuration.

[0018] Figure 6 Is with Figure 2 A similar cross-sectional view, but showing another example of a suction valve in a venting configuration.

[0019] Figure 7 Is with Figure 6 Similar cross-sectional view, but showing the suction valve in suction configuration.

[0020] Figure 8 Is with Figure 2 A similar cross-sectional view, but showing another example of a suction valve in a venting configuration.

[0021] Figure 9 Is with Figure 8 Similar cross-sectional view, but showing the suction valve in suction configuration.

[0022] Figure 10 Is with Figure 2 A similar cross-sectional view, but showing another example of a suction valve in a venting configuration.

[0023] Figure 11 Is with Figure 10 Similar cross-sectional view, but showing the suction valve in suction configuration.

[0024] Figure 12 This is an end view of an exemplary suction valve having an exemplary closure on an exemplary valve housing, wherein the closure is fully open.

[0025] Figure 13 It is along Figure 12 The cross-sectional view taken from line 13-13.

[0026] Figure 14 Is with Figure 12 Similar end view, but showing the closure partially open.

[0027] Figure 15 It is along Figure 14 The cross-sectional view taken from line 15-15.

[0028] Figure 16 Is with Figure 12 and 14 A similar end view, but showing the closure fully closed.

[0029] Figure 17 It is along Figure 16 The cross-sectional view taken from line 17-17.

[0030] Figure 18 This is an end view of an exemplary suction valve having an exemplary closure on an exemplary valve housing, wherein the closure is in a more open position.

[0031] Figure 19 It is along Figure 18 The cross-sectional view taken from line 19-19.

[0032] Figure 20 Is with Figure 18 Similar end view, but showing the closure partially open.

[0033] Figure 21 It is along Figure 20 The cross-sectional view taken from line 21-21.

[0034] Figure 22 Is with Figure 18 and 20 A similar end view, but showing the closure fully closed.

[0035] Figure 23 It is along Figure 22 The cross-sectional view taken from line 23-23.

[0036] Figure 24 This is an end view of an exemplary suction valve having an exemplary closure on an exemplary valve housing, wherein the closure is fully open.

[0037] Figure 25 It is along Figure 24 The cross-sectional view taken from line 25-25.

[0038] Figure 26 Is with Figure 24 Similar end view, but showing the closure partially open.

[0039] Figure 27 It is along Figure 26 The cross-sectional view taken from line 27-27.

[0040] Figure 28 Is with Figure 24 and 26 A similar end view, but showing the closure fully closed.

[0041] Figure 29 It is along Figure 28 The cross-sectional view taken from line 29-29.

[0042] Figure 30This is an end view of an exemplary suction valve having an exemplary closure on an exemplary valve housing, wherein the closure is fully open.

[0043] Figure 31 It is along Figure 30 The cross-sectional view taken from line 31-31.

[0044] Figure 32 Is with Figure 30 Similar end view, but showing the closure partially open.

[0045] Figure 33 It is along Figure 32 The cross-sectional view taken from line 33-33.

[0046] Figure 34 Is with Figure 30 and 32 A similar end view, but showing the closure fully closed.

[0047] Figure 35 It is along Figure 34 The cross-sectional view taken from line 35-35.

[0048] Figure 36 This is an end view of an exemplary suction valve having an exemplary closure on an exemplary valve housing.

[0049] Figure 37 It is along Figure 36 The cross-sectional view taken from line 37-37.

[0050] Figure 38 This is an end view of an exemplary suction valve having a screen-type closure on an exemplary valve housing.

[0051] Figure 39 It is along Figure 38 The cross-sectional view taken from line 39-39. Detailed Implementation

[0052] Figures 1-39 Various examples of suction valves 15 (e.g., suction valves 15a-15e) for endoscope 10 and methods of using them are shown. The term "endoscope" refers to any medical device having a flexible tubular probe 14 for insertion into a patient 16 to visually observe the patient's internal tissues and cavities, and to introduce or aspirate water, air, or other fluids as needed. Some exemplary endoscopes 10 have internal wiring 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.

[0053] The endoscope 10 is used as an example for illustration, and therefore many of the components listed below are optional. Some examples of the endoscope 10 include components such as a handle body 20, a flexible tubular probe 14 extending from the handle body 20, an aspiration valve 15 for controlling the aspiration of fluid 25 (e.g., bodily fluid) drawn back through the flexible tubular probe 14, a dual-fluid valve 12 (air / water valve) for controlling the flow of fluid 22 (e.g., liquid 22a and gas 22b), a steering knob 24 for adjusting the tension in the internal wiring 18, a biopsy port 28 for collecting aspirated 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.

[0054] The control unit 30 and / or its associated external components provide a variety of functions, such as supplying liquids 22a (e.g., water, saline, etc.), supplying gases 22b (e.g., air, carbon dioxide, etc.), providing a vacuum source 52 (e.g., a vacuum pump, venturi tube, etc.), sending and receiving electrical signals, and processing electrical signals. Some of these functions are optional. The umbilical tube 32 connects the control unit 30 to the dual-fluid valve 12, the suction valve 15, the flexible tubular probe 14, or other endoscope-related components in a signal-communication or fluid-communication manner. The term "vacuum" refers to any pressure below atmospheric pressure (i.e., less than 14.7 psia).

[0055] In some examples, the flexible tubular probe 14 includes various components such as internal wiring 18 for steering, conduits 36 (one or more tubes) for delivering fluid 22, a suction tube 35 for drawing fluid 25 from the patient 16, fiber optic cable 38 for delivering images or light, and wires 40 for delivering power or electrical signals. Some of these probe components are optional.

[0056] 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 connected to the light source) for illuminating the patient's lumen, a camera 47 (or a fiber optic cable connected to the camera), an end 45 of the suction cannula 35, an end 48 of the tubing 36, and a lifting element 50 for tilting the ends 45 and / or 48. The lifting element 50 may also be referred to as a swing frame, a pivot frame, or a lifting bed.

[0057] The end 48 of the tubing 36 is open to deliver fluid 22 into the patient 16 for blowing or flushing, while the end 45 of the suction tube 35 is open to draw fluid 25 from the patient 16. In some examples, the vacuum source 52 continuously draws fluid 25 from the patient 16 through the open end 45, the suction tube 35, the suction valve 15, and the umbilical tube 32, and withdraws it through the control unit 30.

[0058] Operator 62 presses, or in some examples simply places their fingers on the tip of suction valve 15, to put suction valve 15 into suction configuration to apply significant suction to suction tube 35. Operator 62 removes their fingers, causing suction valve 15 to return to venting configuration, thereby relieving the vacuum in suction tube 35. Thus, suction valve 15 provides a simple way to open and close suction at the end 45 of suction tube 35.

[0059] Figure 2 and Figure 3 The suction valve 15a is shown in the venting configuration. Figure 2 ) and suction configuration ( Figure 3 In this example, the suction valve 15a includes a valve housing 56 (e.g., valve housings 56a-56e) attached to the handle body 20. In some examples, the suction valve 15a at least partially defines a probe opening 64, a vent opening 66, and a suction source opening 68. The probe opening 64 connects to a suction tube 35 in the flexible tubular probe 14. The suction source opening 68 connects to a suction source 52 via an umbilical tube 32. Figure 2 As shown, the ventilation opening 66 is normally open and in fluid communication with the surrounding atmosphere 76. However, as Figure 3 As shown, the operator 62 can close the ventilation opening 66 with their fingers. The terms "surrounding atmosphere" and "local atmosphere" refer to the indoor air exposed to the outside of the handle body 20.

[0060] To achieve the desired flow pattern through the suction valve 15a, the relative dimensions and / or shapes of the probe opening 64, the vent opening 66, and the suction source opening 68 are strategically designed. In some examples, the suction source opening 68 is larger than the vent opening 66, and the vent opening 66 is larger than the probe opening 64. In some examples, the relative dimensions provide a first flow coefficient for the probe opening 64, a second flow coefficient for the vent opening 66, and a third flow coefficient for the suction source opening 68, wherein the second flow coefficient is greater than the first flow coefficient and less than the third flow coefficient.

[0061] The term "size" related to opening size refers to the minimum cross-sectional area of ​​the opening, which is perpendicular to the direction of fluid flow through the opening. In an example where the opening is cylindrical, the size of such an opening is equal to the square of the cylinder's diameter multiplied by π (pi) divided by four. In an example where the opening converges from a larger diameter to a smaller diameter, the size of such an opening is equal to the square of the smaller diameter multiplied by π (pi) divided by four. In an example where the opening comprises multiple orifices, the size of such an opening is the cumulative cross-sectional area of ​​the multiple orifices of the opening.

[0062] The term "flow coefficient" (abbreviated as Cv) is known as a dimensionless value used to measure the degree of fluid flow relative to a valve, conduit, orifice, or other fluid delivery element. A larger flow coefficient means that more fluid passes through under a given pressure differential. In some examples, a flow coefficient of 1 means that at 60 degrees Fahrenheit and a pressure differential of 1 psig, the valve can pass through 1 gallon of water per minute.

[0063] Some examples of valve housing 56 include a housing 70 and a valve cylinder 72. In some examples, the valve cylinder 72 is axisymmetric about its longitudinal axis, thus allowing it to be mounted in any rotational direction. In some examples, regardless of whether the suction valve 15a is in a venting or suction configuration, the valve cylinder 72 fluidly connects the probe opening 64 to the suction source opening 68 and the vent opening 66.

[0064] When the second flow coefficient of the vent 66 is greater than the first flow coefficient of the probe 64 and less than the third flow coefficient of the suction source 68, the suction source 68 has a much greater tendency to draw air from the vent 66 than it does when the vent 66 is uncovered in the venting configuration, such as... Figure 2 As shown. Therefore, when the vent opening 66 is not covered, most of the air flowing through the suction valve 15a flows from the vent opening 66 to the suction source opening 68. This is in Figure 2 The description is as follows, where the thick arrow 74 indicates a larger airflow than the thin arrow 78. When most of the airflow enters the suction source opening 68 from the vent opening 66, the end 45 of the suction tube 35 produces only a negligible amount of suction.

[0065] like Figure 3 As shown, the vent opening 66 is closed, and the suction valve 15a is positioned in a suction configuration. In the suction configuration, virtually all the flow through the suction valve 15a flows from the probe opening 64 to the suction source opening 68, as indicated by the thick arrow 80. Therefore, in the suction configuration, a significant amount of suction is generated at the end 45 of the suction tube 35.

[0066] In some examples, the positions of the suction source opening 68 and the probe opening 64 are reversed. For example, Figure 4 and Figure 5 The suction valve 15b is shown to include a valve housing 56b having a probe opening 82 along its side and a suction source opening 84 at its bottom. The relative dimensions and flow coefficients of the probe opening 82, the vent opening 66, and the suction source opening 84 are substantially the same as those of the corresponding openings 64, 66, and 68 of the suction valve 15a.

[0067] Figure 4 The suction valve 15b is shown in the venting configuration, and Figure 5The suction configuration is shown. In the ventilation configuration, most of the flow tends to flow from the ventilation opening 66 to the suction source opening 84, as indicated by the thick arrow 86. Only a small amount of flow flows from the probe opening 35 to the suction source opening 52, as indicated by the thin arrow 88. In the ventilation configuration, only a negligible amount of suction is produced at the end 45 of the suction tube 35.

[0068] like Figure 5 As shown, the vent opening 66 is closed, and the suction valve 15b is positioned in a suction configuration. In the suction configuration, virtually all the flow through the suction valve 15b flows from the probe opening 82 to the suction source opening 84, as indicated by the thick arrow 90. Therefore, in the suction configuration, a significant amount of suction is generated at the end 45 of the suction tube 35.

[0069] Figure 6 and Figure 7 A suction valve 15c is shown, which is similar to a suction valve 15a. However, the suction valve 15c includes a single integral valve housing 56c (a seamless one-piece) instead of a valve housing that includes two parts, such as the housing 70 and the valve cylinder 72 of the suction valve 15a.

[0070] Valve housing 56c at least partially defines probe opening 92, vent opening 94, and suction source opening 96. The dimensions and / or flow coefficients of openings 92, 94, and 96 correspond to openings 64, 66, and 68, respectively.

[0071] Figure 6 The suction valve 15c is shown in the venting configuration, and Figure 7 The suction configuration is shown. In the ventilation configuration, most of the flow tends to flow from the ventilation opening 94 to the suction source opening 96, as indicated by the thick arrow 98. Only a small amount of flow flows from the probe opening 92 to the suction source opening 96, as indicated by the thin arrow 100. In the ventilation configuration, the end 45 of the suction tube 35 produces only a negligible amount of suction.

[0072] like Figure 7 As shown, the vent opening 94 is closed, placing the suction valve 15b in the suction configuration. In the suction configuration, virtually all the flow through the suction valve 15c flows from the probe opening 92 to the suction source opening 96, as indicated by the thick arrow 102. Therefore, in the suction configuration, a significant amount of suction is generated at the end 45 of the suction tube 35.

[0073] In some examples, the positions of the suction source opening 96 and the probe opening 92 are reversed. For example, Figure 8 and Figure 9The suction valve 15d is shown to include a valve housing 56d having a probe opening 104 along its side and a suction source opening 106 at its bottom. The relative dimensions and flow coefficients of the probe opening 104, the vent opening 94, and the suction source opening 106 are substantially the same as those of the corresponding openings 92, 94, and 96 of the suction valve 15c.

[0074] Figure 8 The suction valve 15d is shown in the venting configuration, and Figure 9 The suction configuration is shown. In the ventilation configuration, most of the flow tends to flow from the ventilation opening 94 to the suction source opening 106, as indicated by the thick arrow 108. Only a small amount of flow flows from the probe opening 104 to the suction source opening 106, as indicated by the thin arrow 110. In the ventilation configuration, only a negligible amount of suction is produced at the end 45 of the suction tube 35.

[0075] like Figure 9 As shown, the vent opening 94 is closed, and the suction valve 15d is positioned in a suction configuration. In the suction configuration, virtually all the flow through the suction valve 15d flows from the probe opening 104 to the suction source opening 106, as indicated by the thick arrow 112. Therefore, in the suction configuration, a significant amount of suction is generated at the end 45 of the suction tube 35.

[0076] Figure 10 and Figure 11 A suction valve 15e is shown, which is similar to the suction valve 15c. However, the main difference is that the suction valve 15e includes a valve core 114 mounted within a central bore 116 of the valve housing 56e. The valve core 114 can be moved from its original position ( Figure 10 Move to the downward position ( Figure 11 In some examples, spring 118 advances valve spool 114 to its original position. The movement of the valve spool provides operator 62 with familiar tactile feedback, indicating when the suction valve 15e is in the suction configuration, such as... Figure 11 As shown. Figure 10 The suction valve 15e is shown in the venting configuration.

[0077] In some examples, the valve housing 56e at least partially defines a probe opening 120, a vent opening 122, and a suction source opening 124. The probe opening 120 connects to a suction tube 35 in the flexible tubular probe 14. The suction source opening 124 connects to a suction source 52 via an umbilical tube 32. Figure 10 As shown, when the suction valve 15e is in the venting configuration, the vent opening 122 is normally open and in fluid communication with the surrounding atmosphere 76.

[0078] In some examples, valve spool 114 has a valve spool passage 126 that fluidly connects suction source opening 124 to probe opening 120. In a venting configuration, valve spool passage 126 is also fluidly connected to the surrounding atmosphere 76.

[0079] To achieve the desired flow pattern through the suction valve 15e, the relative dimensions and / or shapes of the probe opening 120, the vent opening 122, and the suction source opening 124 are strategically designed. In some examples, the suction source opening 124 is larger than the vent opening 122, and the vent opening 122 is larger than the probe opening 120. In some examples, the relative dimensions provide a first flow coefficient for the probe opening 120, a second flow coefficient for the vent opening 122, and a third flow coefficient for the suction source opening 124, wherein the second flow coefficient is greater than the first flow coefficient and less than the third flow coefficient.

[0080] In the illustrative example, the vent opening 122 includes two paths. The first path is provided by the valve core passage 126 in the valve core 114. The second path is provided by the annular gap 128 between the valve core 114 and the central bore 116 of the valve housing 56e. The flow coefficient of the vent opening is the cumulative amount of the valve core passage 126 and the annular gap 128.

[0081] When the second flow coefficient of the vent 122 is greater than the first flow coefficient of the probe 120 and less than the third flow coefficient of the suction source 124, the tendency of the suction source 124 to draw air from the vent 122 is much greater than the tendency to draw air from the probe 120 when the valve core 114 is in its original position and the vent 122 is not covered in the vent configuration. Figure 10 As shown. In the ventilation configuration, most of the air flowing through the suction valve 15e flows from the ventilation opening 122 to the suction source opening 124. This is in Figure 10 The image is described using a thick arrow 130. Because the probe opening 120 has a relatively small size, only a small amount of flow passes from the probe opening 120 to the suction source opening 124, such as... Figure 10 As described by thin arrow 132. When most of the airflow flows from the vent opening 122 to the suction source opening 124 in the venting configuration, only a negligible amount of suction is produced at the end 45 of the suction tube 35.

[0082] Move valve core 114 from its original position ( Figure 10 Press down to the lower position ( Figure 11 ), close the vent opening 122 to place the suction valve 15e in the suction configuration, such as Figure 11 As shown. In some examples, seal 134 (e.g., O-ring, gasket, etc.) ensures a positive pressure seal between valve housing 56e and button head 136 of valve core 114.

[0083] In the suction configuration, virtually all the flow through the suction valve 15e flows from the probe opening 120 to the suction source opening 124, such as... Figure 11As indicated by the thick arrow 138. This results in a significant amount of suction at the end 45 of the suction tube 35 in the suction configuration.

[0084] Figures 12-39 Various closures 88 (e.g., closures 88a-88f) are shown to completely block, partially block, and / or regulate the vent opening 140 of the valve housing 56. For example, the valve housing 56 is similar to... Figure 6 and Figure 7 Valve housing 56c; however, various closures 88a to 88f can be applied to Figures 1-37 Any valve housing shown.

[0085] exist Figures 12-17 In the example shown, closure 88a includes a base 144, a cap 146, and a pin 148. The base 144 has a hole 150 and connects to the valve housing 56 at a vent opening 140. The pin 148 pivotally connects the cap 146 to the base 144. The pin 148 allows the cap 146 to swing to a fully open or partially closed position. Figure 12 and Figure 13 ), more closed positions ( Figure 16 and Figure 17 ), and various partially open locations (e.g. Figure 14 and Figure 15 The position range of the cap provides a means of changing the flow coefficient of the vent opening 140, thereby adjusting the suction volume applied to the end 45 of the suction tube 35.

[0086] exist Figures 18-23 In the example shown, the closure 88b includes a base 152 and a cover 154. The base 152 has a base hole 156 and connects to the valve housing 56 at a vent opening 140. The cover 154 has a cover hole 158 and is rotatable relative to the base 152 to adjust the alignment of the two holes 156 and 158. The cover 154 can be rotated to multiple open positions (…). Figure 18 and 19 ), completely closed or multiple closed positions ( Figure 22 and 23 ), and various partially open locations (e.g. Figure 20 and 21 The rotatability of the cap provides a means of changing the flow coefficient of the vent opening 140, thereby adjusting the suction volume applied to the end 45 of the suction tube 35.

[0087] exist Figures 24-29In the example, closure 88c includes an iris valve 160, which includes a plurality of blades 162. A lower pin 164 connects the blades 162 to a lower ring 166, and an upper pin 168 connects the blades 162 to an upper ring 170. The lower ring 166 is secured to the valve housing 56. The upper ring 170 is rotatable relative to the lower ring 166. Rotation 165 of the upper ring 170 causes the blades 162 to pivot about the upper and lower pins 164 and 168. As the blades 162 pivot, they move radially inward or outward depending on the direction of rotation of the upper ring. The blades 162 can move to a fully open or partially closed position (…). Figure 24 and 25 ), complete or multiple closed positions ( Figure 28 and 29 ), and various partially open locations (e.g. Figure 26 and 27 The position range of the blades provides the iris valve 160 with a means to change the flow coefficient of the vent opening 140, thereby regulating the suction volume applied to the end 45 of the suction tube 35.

[0088] exist Figures 30-35 In the example shown, the closure 88d includes another type of iris valve 172. In this example, the closure 88d includes a lower ring 174, an upper ring 174, an annular retainer 178, and a tubular diaphragm 180. In some examples, the diaphragm 180 is a thin, elastic monolithic material in the form of a seamless tubular tube. Exemplary materials for the tubular diaphragm 180 include latex, elastic fibers (e.g., spandex), silicone, nitrile, neoprene, etc. The annular retainer 178 secures the lower end 182 of the diaphragm 180 to the inner bore 184 of the valve housing 56. The upper end 186 of the diaphragm 180 is clamped between the upper ring and the lower rings 174 and 176. The upper ring and the lower rings 174 and 176 are stationary relative to each other but can rotate relative to the valve housing 56 as a ring assembly 188.

[0089] The rotating ring assembly 188 twists the diaphragm 180 to different degrees depending on the degree of rotation. In some examples, the twisting action causes the diaphragm 180 to change from a truncated conical shape (…). Figure 31 It transforms into an approximately monolithic hyperboloid shape, such as Figure 33 and 35 As shown. When the diaphragm 180 is twisted, the crease line 185 will appear naturally. In some examples, the ring assembly 188 can rotate from 0 degrees to 180 degrees. 0 degrees is shown in... Figure 30 and Figure 31 90 degrees is shown Figure 32 and Figure 33 And shown 180 degrees Figure 34 and Figure 35 .

[0090] like Figures 30-35 As shown, the iris valve 172 can be adjusted to a fully open or partially closed position. Figure 30 and Figure 31 ), complete or multiple closed positions ( Figure 34 and Figure 35 ), and various partially open locations (e.g. Figure 32 and Figure 33 The torsion diaphragm 180 provides the iris valve 172 with a means to change the flow coefficient of the vent opening 140, thereby regulating the suction volume applied to the end 45 of the suction tube 35.

[0091] exist Figure 36 and Figure 37 In the example shown, the closure 88e is an easily removable cover 190 that can be attached to the valve housing 56 to selectively cover or expose the vent opening 140. Exemplary means for holding the closure 88e in place include snap-fit ​​connections, press-fitting, magnetic attraction, etc.

[0092] exist Figure 38 and Figure 39 In the example shown, the closure 88f is a cover 192 with a screen 194 or filter extending through an opening 196 in the cover 192. The screen 194 helps prevent debris or other contaminants from entering the valve housing 56. Selectively installing or removing the closure 88f can alter the flow coefficient of the vent opening 140.

[0093] Suction valves 15a to 15e ( Figures 1-39 Some examples can be defined as described in Examples 1 to 20 below.

[0094] Example-1A suction valve for controlling fluid flow through an endoscope, the endoscope including a flexible tubular probe extending from a handle body, the endoscope being connectable to a suction source, the suction valve being selectively configured in a suction configuration and a venting configuration, the suction valve including: a valve housing supported by the handle body; a probe opening having a first flow coefficient, fluidly connected to the flexible tubular probe, the probe opening being at least partially defined by the valve housing; and a venting opening having a second flow coefficient, the venting opening being fluidly connected to the ambient atmosphere when the suction valve is in the venting configuration, the venting opening being at least partially defined by the valve housing, the venting opening being selectively openable and closed. The valve is closed, wherein the suction valve is in the vent configuration when the vent opening is open, and in the suction configuration when the vent opening is closed; and a suction source opening having a third flow coefficient, which is fluidly connected to the suction source, the suction source opening being defined by the valve housing, the second flow coefficient being greater than the first flow coefficient and less than the third flow coefficient, wherein when the vent opening is open in the vent configuration, most of the fluid flowing through the suction valve flows from the vent opening to the suction source opening, and when the vent opening is closed in the suction configuration, most of the fluid flowing through the suction valve flows from the probe opening to the suction source opening.

[0095] Example-2 According to the suction valve of Example-1, the probe opening has a first minimum diameter, the vent opening has a second minimum diameter, the suction source opening has a third minimum diameter, and the second minimum diameter is greater than the first minimum diameter and less than the third minimum diameter.

[0096] Example-3 According to the suction valve described in Example-1, the second flow coefficient is numerically closer to the third flow coefficient than the first flow coefficient.

[0097] Example-4 According to Example-1, the suction valve remains completely stationary relative to the handle body when the suction valve changes between the suction configuration and the ventilation configuration.

[0098] Example-5 According to the suction valve of Example-1, the probe opening remains open in both the ventilation configuration and the suction configuration.

[0099] Example-6 According to the suction valve of Example-1, the probe opening is fluidly connected to both the suction source opening and the ventilation opening in both the ventilation configuration and the suction configuration.

[0100] Example-7 According to the suction valve of Example-1, wherein the valve housing includes a shell containing a valve cylinder, and the valve cylinder fluidly connects the probe opening to both the suction source opening and the ventilation opening in both the venting configuration and the suction configuration.

[0101] Example-8 According to Example-7, the suction valve wherein the valve cylinder remains stationary relative to the housing when the suction valve changes between the suction configuration and the venting configuration.

[0102] Example-9 According to Example-7, the suction valve is axially symmetric.

[0103] Example-10 The suction valve according to Example-1 further includes a closure attached to the valve housing at the vent opening.

[0104] Example-11 According to the suction valve of Example-10, the closure is movable between a more closed position and a less closed position, wherein the closure provides greater obstruction to the vent opening in the more closed position than in the less closed position.

[0105] Example-12 According to the suction valve of Example-11, at least a portion of the closure element is rotatable between the more closed position and the less closed position.

[0106] Example-13 According to the suction valve described in Example-12, the closure element is an iris valve.

[0107] Example-14 The suction valve according to Example-1 further includes a filter attached to the valve housing at the vent opening.

[0108] Example-15 The suction valve according to Example-1 further includes: a valve core disposed within the valve housing, the valve core defining a valve core channel fluidly connecting the probe opening to the suction source opening, the valve core being selectively movable relative to the valve housing to an initial position and a depressed position; a plug on the valve core, the plug providing greater obstruction to the vent opening in the depressed position than in the initial position; and a spring disposed within the valve housing, the spring advancing the valve core to the initial position.

[0109] Example-16A suction valve for controlling fluid flow through an endoscope, the endoscope including a flexible tubular probe extending from a handle body, the endoscope being connectable to a suction source, the suction valve being selectively configured in a suction configuration and a venting configuration, the suction valve including: a valve housing supported by the handle body; a probe opening fluidly connected to the flexible tubular probe, the probe opening having a first size and at least partially defined by the valve housing; and a venting opening fluidly connected to the ambient atmosphere when the suction valve is in the venting configuration, the venting opening having a second size and at least partially defined by the valve housing, the venting opening being selectively... The valve body has the following opening and closing mechanisms: when the vent is open, the suction valve is in a venting configuration; when the vent is closed, the suction valve is in a suction configuration; and a suction source opening is fluidly connected to the suction source, the suction source opening having a third dimension and being at least partially defined by the valve housing, the second dimension being larger than the first dimension and smaller than the third dimension, wherein when the vent is open in the venting configuration, most of the fluid flowing through the suction valve flows from the vent to the suction source opening, and when the vent is closed in the suction configuration, most of the fluid flowing through the suction valve flows from the probe opening to the suction source opening.

[0110] Example-17 According to Example-16, the suction valve remains completely stationary relative to the handle body when the suction valve changes between the suction configuration and the venting configuration.

[0111] Example-18 According to the suction valve of Example-16, the probe opening is fluidly connected to both the suction source opening and the ventilation opening in both the ventilation configuration and the suction configuration.

[0112] Example-19 According to Example-16, the suction valve further includes a closure attached to the valve housing at the vent opening, wherein the closure is movable between a more closed position and a less closed position, the closure providing greater obstruction to the vent opening in the more closed position than in the less closed position.

[0113] Example-20A suction valve system for conveying fluid and configured in a suction configuration and a venting configuration, the suction valve system comprising: an endoscope handle body; a valve housing supported by the handle body, the valve housing at least partially defining a probe opening, a venting opening, and a suction source opening; the probe opening being in fluid communication with both the suction source opening and the venting opening in the suction configuration and the venting configuration, the venting opening being selectively openable and closed, the suction valve system being in the suction configuration when the venting opening is closed, and in the venting configuration when the venting opening is open, allowing the venting opening to be in fluid communication with the surrounding atmosphere, the probe opening having a first flow coefficient, wherein when the venting opening is open... The ventilation opening has a second flow coefficient, and the suction source opening has a third flow coefficient; the second flow coefficient is greater than the first flow coefficient and less than the third flow coefficient, and when the ventilation opening is open in the ventilation configuration, most of the fluid flowing through the suction valve system flows from the ventilation opening to the suction source opening, and when the ventilation opening is closed in the suction configuration, most of the fluid flowing through the suction valve flows from the probe opening to the suction source opening; an umbilical tube is attached to the handle body to connect the suction source to the suction source opening of the valve housing; a flexible tubular probe is attached to the handle body; and a suction tube is attached to the valve housing at the probe opening and extends through the flexible tubular probe.

[0114] This disclosure should not be construed as limiting it to the specific 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. A suction valve for controlling fluid flow through an endoscope, the endoscope including a flexible tubular probe extending from a handle body, the endoscope being connectable to a suction source, the suction valve being selectively configured in a suction configuration and a venting configuration, the suction valve comprising: The valve housing is supported by the handle body; A probe opening having a first flow coefficient is fluidly connected to the flexible tubular probe, the probe opening being at least partially defined by the valve housing; A vent opening having a second flow coefficient, wherein the vent opening is in fluid communication with the surrounding atmosphere when the suction valve is in the vent configuration, the vent opening is at least partially defined by the valve housing, the vent opening is selectively open and closed, the suction valve is in the vent configuration when the vent opening is open, and the suction valve is in the suction configuration when the vent opening is closed; as well as A suction source opening having a third flow coefficient is fluidly connected to the suction source, the suction source opening being defined by the valve housing, the second flow coefficient being greater than the first flow coefficient and less than the third flow coefficient, when the vent opening is open in the venting configuration, most of the fluid flowing through the suction valve flows from the vent opening to the suction source opening, and when the vent opening is closed in the suction configuration, most of the fluid flowing through the suction valve flows from the probe opening to the suction source opening.

2. The suction valve according to claim 1, wherein the probe opening has a first minimum diameter, the vent opening has a second minimum diameter, the suction source opening has a third minimum diameter, and the second minimum diameter is greater than the first minimum diameter and less than the third minimum diameter.

3. The suction valve according to any one of claims 1 or 2, wherein the second flow coefficient is numerically closer to the third flow coefficient than the first flow coefficient.

4. The suction valve according to any one of claims 1 to 3, wherein when the suction valve changes between the suction configuration and the venting configuration, the suction valve remains completely stationary relative to the handle body.

5. The suction valve according to any one of claims 1 to 4, wherein the probe opening remains open in both the ventilation configuration and the suction configuration.

6. The suction valve according to any one of claims 1 to 5, wherein the probe opening is fluidly connected to both the suction source opening and the ventilation opening in both the ventilation configuration and the suction configuration.

7. The suction valve according to any one of claims 1 to 6, wherein the valve housing comprises a shell with a valve cylinder, and the valve cylinder fluidly connects the probe opening to both the suction source opening and the ventilation opening in the venting configuration and the suction configuration.

8. The suction valve of claim 7, wherein when the suction valve changes between the suction configuration and the venting configuration, the valve cylinder remains stationary relative to the housing.

9. The suction valve according to claim 7, wherein the valve cylinder is axially symmetrical.

10. The suction valve according to any one of claims 1 to 9, further comprising a closure attached to the valve housing at the vent opening.

11. The suction valve of claim 10, wherein the closure is movable between a more closed position and a less closed position, the closure providing greater obstruction to the vent opening in the more closed position than in the less closed position.

12. The suction valve of claim 11, wherein at least a portion of the closure element is rotatable between the more closed positions and the fewer closed positions.

13. The suction valve according to claim 12, wherein the closure element is an iris valve.

14. The suction valve according to any one of claims 1 to 13, further comprising a filter attached to the valve housing at the vent opening.

15. The suction valve according to any one of claims 1 to 14, further comprising: A valve core disposed within the valve housing defines a valve core channel that fluidly connects the probe opening to the suction source opening. The valve core is selectively movable relative to the valve housing to an initial position and a depressed position. The plug on the valve core provides greater obstruction to the vent opening in the depressed position than in the original position; as well as A spring disposed within the valve housing advances the valve core to its original position.

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