Airflow adjusting device for medical in-vitro drainage apparatus
By designing an airflow regulation device for medical external drainage devices, stepless adjustment is achieved through the gradually expanding structure of the air guide groove, solving the problem of precise airflow control in existing drainage devices and ensuring a clear field of vision and effective smoke removal during surgery.
Patent Information
- Application Number
- CN202423157473.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing medical external drainage devices are mostly used for liquid drainage and are not suitable for gas drainage. In particular, it is difficult to accurately control the airflow according to the smoke concentration when removing smoke during surgery, which affects the surgical field of vision.
An airflow regulating device was designed, comprising a flow-guiding shell, an adjusting cover plate, an air guide pipe, and an adjusting sleeve. The device achieves stepless adjustment of the exhaust volume through the gradually expanding structure of the air guide groove, and uses the adjusting cover plate to control the axial movement of the air guide pipe within the air guide groove to precisely regulate the airflow rate.
It achieves precise airflow control based on smoke concentration, ensuring a clear surgical field, reasonable structure, and convenient operation, and is suitable for gas drainage.
Smart Images
Figure CN223886975U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an airflow regulating device for a medical external drainage device, belonging to the field of medical device technology. Background Technology
[0002] Medical external drainage devices are commonly used during surgery. Inserting a drainage tube into the patient's body through this device is a routine aseptic technique used in clinical practice to drain blood clots and fluid accumulation. During surgery, electrosurgical instruments such as electrosurgical units are used to rapidly dehydrate, decompose, evaporate, and coagulate blood upon contact with the tissue, achieving tissue breakdown and hemostasis. Smoke is generated during surgery; in endoscopic procedures, smoke within the abdominal cavity can directly affect the surgeon's observation and thus the operation. Therefore, negative pressure airflow is needed to remove the smoke through the drainage tube. Maintaining a certain pressure within the abdominal cavity during surgery requires controlling the negative pressure airflow according to the smoke concentration to remove the smoke through the drainage tube. However, most existing drainage devices are designed for fluid drainage and are not suitable for gas drainage. Summary of the Invention
[0003] The purpose of this invention is to provide an airflow regulating device for a medical external drainage device that has a reasonable structure, is easy to operate, and can steplessly regulate the flow rate of the discharged gas.
[0004] The technical solution of this utility model to achieve the above objectives is: an airflow regulating device for a medical external drainage device, characterized in that it includes a drainage shell, an adjusting cover plate, an air guide tube, and an adjusting sleeve;
[0005] The drainage housing includes a cavity and an outlet and an inlet connector at both ends. The adjusting sleeve is installed inside the drainage housing and located on one side of the exhaust chamber. One side of the air guide pipe is sealed and installed at the inlet chamber of the drainage housing and communicates with the inlet connector, while the other side is sealed and installed on the adjusting sleeve. The end of the air guide pipe located in the exhaust chamber has a sealing end face. The air guide pipe has a radial exhaust hole on the pipe wall near the sealing end face. The adjusting cover plate on the drainage housing is connected to the air guide pipe and drives the air guide pipe to move axially. The adjusting sleeve has an axial air guide groove on the hole wall on one side of the exhaust chamber, and the air guide groove communicates with the outlet connector. The air guide groove is a groove with a gradually expanding exhaust cross section in the airflow path. The exhaust hole on the air guide pipe is located at the air guide groove of the adjusting sleeve. When the exhaust hole moves from the inside of the air guide groove to the outside, the exhaust volume gradually increases. When the exhaust hole of the air guide pipe moves beyond the air guide groove and connects with the hole wall of the adjusting sleeve, it is in the exhaust closed state.
[0006] This utility model's airflow regulating device includes an air guide tube and an adjusting sleeve installed inside the drainage housing. The air guide tube communicates with the suction connector of the drainage housing, while the end face of the air guide tube at the outlet connector is a sealed end face. The air guide tube is sealed and installed on the drainage housing and adjusting sleeve. The air guide tube can be moved axially by an adjusting cover plate on the drainage housing. The radial exhaust hole on the outlet side of the air guide tube moves axially along the air guide groove on the adjusting sleeve. Therefore, the flow rate of the discharged gas can be easily adjusted by changing the exhaust cross-section on the air guide groove. The air guide groove of this utility model is a groove with a gradually expanding exhaust cross-section along the airflow path. Therefore, changes in the cross-section of the air guide groove correspond to changes in the exhaust volume, achieving stepless adjustment of the exhaust flow rate. Thus, during surgery, the exhaust volume can be precisely controlled according to the smoke concentration and other conditions, allowing for timely smoke removal and maintaining clear intraoperative imaging. This utility model has a reasonable structure, and the stepless adjustment of the exhaust volume is achieved simply by operating the adjusting cover plate, making it easy to operate. Attached Figure Description
[0007] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.
[0008] Figure 1 This is a schematic diagram of the airflow regulation device of the medical external drainage device of this utility model.
[0009] Figure 2 This is a front view schematic diagram of the airflow regulation device of the medical external drainage device of this utility model.
[0010] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure.
[0011] Figure 4 This is a three-dimensional structural diagram of the adjusting sleeve of this utility model.
[0012] Figure 5 This is a schematic diagram of the structure of the airflow regulating device of this utility model in the maximum exhaust volume state.
[0013] Figure 6 This is a schematic diagram of the airflow regulating device of this utility model in the exhaust closed state.
[0014] Figure 7 This is a schematic diagram of the flow regulating device of this utility model installed on the drainage pipeline.
[0015] Wherein: 1—Drainage housing, 1-1—Intake connector, 1-2—Outtake connector, 1-3—Fixed mark, 1-4—Anti-slip convex strip, 1-5—Intake chamber, 1-6—Exhaust chamber, 1-7—Guide tube, 2—Adjusting cover plate, 2-1—Toggle, 2-2—Position mark, 2-3—Inner lever, 3—Sealing ring, 4—Guide tube, 4-1—Connecting part, 4-2—Exhaust hole, 5—Adjusting sleeve, 5-1—Guide groove, 6—Negative pressure tube, 7—Drainage tube, 8—Filter, 9—One-way valve. Detailed Implementation
[0016] See Figures 1-7 As shown, this utility model discloses an airflow regulating device for a medical external drainage device, comprising a drainage shell 1, an adjusting cover plate 2, an air duct 4, and an adjusting sleeve 5.
[0017] See Figures 1-4 As shown, the drainage housing 1 of this utility model includes a cavity and an air outlet connector 1-2 and an air inlet connector 1-1 at both ends. The air inlet connector 1-1 is connected to the surgical instrument through the drainage tube 7, and the air outlet connector 1-2 is connected to the negative pressure pump through the negative pressure tube 6. When smoke is generated during the operation, the negative pressure pump can be turned on, and the smoke can be sucked out in time through the drainage tube 7 and the airflow regulating device.
[0018] See Figure 1 , 2 As shown, the drainage shell 1 of this utility model has an elliptical cross-section on its outer periphery, and the drainage shell 1 has a transitional arc shape in the middle of its outer periphery to divide the drainage shell 1 into two ellipses of different sizes. The outer periphery of the larger ellipse on the suction side of the drainage shell 1 is provided with anti-slip raised and recessed strips 1-4. Therefore, by changing the streamlined shape of the elliptical cross-section, the anti-slip raised and recessed strips 1-4 can be positioned at the grip area. The position of the dial 2-1 on the adjustment cover plate 2 can be adjusted by moving the dial at the grip area, which is more in line with the ergonomic principle, simple and convenient to operate, and has good usability.
[0019] See Figures 1-4 As shown, the adjusting sleeve 5 of this utility model is installed inside the diversion housing 1 and located on one side of the exhaust chamber 1-6. The adjusting sleeve 5 can be tightly fitted onto the diversion housing 1, so that the adjusting sleeve 5 is on the air outlet side of the diversion housing 1 and is in a sealed state. The air guide pipe 4 is installed inside the diversion housing 1. One side of the air guide pipe 4 is sealed and installed at the air intake chamber 1-5 of the diversion housing 1 and communicates with the air intake connector 1-1. The other side is sealed and installed on the adjusting sleeve 5. The end of the air guide pipe 4 located in the exhaust chamber 1-6 has a sealing end face. The air guide pipe 4 has a radial exhaust hole 4-2 on the pipe wall near the sealing end face. Therefore, the negative pressure airflow enters the air guide groove 5-1 of the adjusting sleeve 5 through the exhaust hole 4-2 on the air guide pipe 4 and is discharged through the air outlet connector 1-2. The adjusting cover plate 2 set on the diversion housing 1 is connected to the air guide pipe 4 and drives the air guide pipe 4 to move axially. The exhaust flow rate is adjusted by operating the axial movement of the adjusting cover plate 2.
[0020] See Figures 3-4 As shown, the drainage housing 1 of this utility model is provided with an axial limiting groove. The inner and outer sides of the adjusting cover plate 2 are respectively provided with an inner lever 2-3 and an outer lever 2-1. The inner lever 2-3 is set in the limiting groove of the drainage housing 1 and is connected to the connecting part 4-1 in the middle of the air guide tube 4. The inner lever 2-3 is provided with a connecting groove, while the connecting part 4-1 on the air guide tube 4 is a protrusion. The protrusion on the air guide tube 4 is set in the connecting groove of the inner lever 2-3. Alternatively, the inner lever 2-3 may be provided with a protrusion, and the connecting part 4-1 on the air guide tube 4 may be a corresponding connecting groove. The protrusion on the inner lever 2-3 is set in the connecting groove of the air guide tube 4, and the adjusting cover plate 2 is quickly installed on the air guide tube 4. The surface of the outer lever 2-1 is provided with an anti-slip concave-convex surface, which is convenient to operate and reliable.
[0021] See Figures 1-4 As shown, the adjusting sleeve 5 of this utility model has an axial air guide groove 5-1 on the hole wall on one side of the exhaust chamber 1-6, and the air guide groove 5-1 communicates with the air outlet connector 1-2. The gas discharged from the air guide pipe 4 is discharged from the air outlet connector 1-2 through the air guide groove 5-1. Figures 3-6 As shown, the air guide groove 5-1 of this utility model is a groove with a gradually expanding exhaust cross-section along the airflow path. The air guide groove 5-1 on the adjusting sleeve 5 has a gradually expanding exhaust cross-section from the inner side to the outer end face. The exhaust hole 4-2 on the air guide pipe 4 is located at the air guide groove 5-1 of the adjusting sleeve 5, and when the exhaust hole 4-2 moves from the inner side of the air guide groove 5-1 to the outer side, the exhaust volume gradually increases. Figure 3 As shown, the exhaust port 4-2 on the air guide pipe 4 is located in the middle of the air guide groove 5-1 on the adjusting sleeve 5. Figure 5 As shown, the exhaust port 4-2 on the air guide pipe 4 is located outside the air guide groove 5-1 on the adjusting sleeve 5, which is the state of maximum exhaust volume. Therefore, the exhaust volume of the exhaust port 4-2 on the air guide pipe 4 increases as the exhaust cross-section of the air guide groove 5-1 increases, and decreases as the cross-section decreases. See Figure 6 As shown, when the exhaust port 4-2 on the air guide pipe 4 moves beyond the air guide groove 5-1 and connects with the hole wall of the adjusting sleeve 5, it is in the exhaust closed state. Therefore, by adjusting the cover plate 2, the movement of the air guide pipe 4 within the adjusting sleeve 5 is controlled, so that the exhaust port 4-2 corresponds to the position of the exhaust cross section of the air guide groove 5-1, thereby controlling the exhaust volume. Since the air guide groove 5-1 adopts an exhaust cross section with varying cross section, stepless adjustment of the exhaust flow rate can be achieved. See Figures 1-3As shown, this utility model allows for convenient observation and adjustment of the corresponding exhaust volume during operation. The guide housing 1 is provided with a fixed mark 1-3 on one side of the adjustment cover plate 2, such as a triangular mark. The adjustment cover plate 2 is provided with multiple position marks 2-2, and each position mark 2-2 corresponds to a different exhaust section on the air guide groove 5-1. The position mark 2-2 can be a number. By corresponding each position mark 2-2 with the fixed mark 1-3, the exhaust volume can be observed.
[0022] See Figure 3 , 4 As shown, the air guide groove 5-1 on the adjusting sleeve 5 of this invention is a trapezoidal groove. The trapezoidal groove gradually expands from the inside to the end face of the adjusting sleeve 5 along the depth and width of the groove, forming a variable cross-section air guide groove to achieve stepless exhaust adjustment. Alternatively, the air guide groove 5-1 on the adjusting sleeve 5 can be a rectangular groove. The rectangular groove gradually expands from the inside to the end face of the adjusting sleeve 5 along the depth of the groove, also forming a variable cross-section air guide groove to achieve stepless exhaust adjustment. In yet another structure, the air guide groove 5-1 on the adjusting sleeve 5 is a semi-arc groove. The semi-arc groove gradually expands from the inside to the end face of the adjusting sleeve 5 into a semi-conical groove, also forming a variable cross-section air guide groove.
[0023] See Figures 1-3 As shown in Figures 5 to 7, the air intake chamber 1-5 of the drainage housing 1 of this utility model is provided with a guide tube 1-7. The air guide tube 4 is provided with sealing grooves on both sides. One side of the air guide tube 4 is installed on the guide tube 1-7 through a sealing ring 3 provided in the sealing groove, and the other side of the air guide tube 4 is installed on the adjusting sleeve 5 through a sealing ring 3 provided in the sealing groove. Therefore, when the air guide tube 4 moves axially within the guide tube 1-7 and the adjusting sleeve 5, it maintains a good sealing effect.
[0024] See Figures 1-3 As shown in Figures 5 to 7, the suction connector 1-1 of this utility model has a gradually expanding conical hole through which airflow passes and communicates with the guide tube 1-7. The outer periphery of the suction connector 1-1 has at least one first anti-detachment protrusion ring to limit the drainage tube 7. The drainage tube 7 is installed on the suction connector 1-1 and limited by the first anti-detachment protrusion ring, which facilitates the installation of the drainage tube 7 on the airflow regulating device. The air guide groove 5-1 of the regulating sleeve 5 communicates with the gradually converging conical hole through which airflow passes in the outlet connector 1-2. The outer periphery of the outlet connector 1-2 has at least one second anti-detachment protrusion ring to limit the negative pressure tube 6. The negative pressure tube 6 is reliably installed on the second anti-detachment protrusion ring on the outlet connector 1-2. Both the first anti-detachment protrusion ring on the suction connector 1-1 and the second anti-detachment protrusion ring on the outlet connector 1-2 of this utility model can be provided with 2 to 3 protrusion rings.
[0025] See Figure 7As shown, the suction connector 1-1 of the drainage housing 1 of this utility model is connected to the drainage tube 7. A one-way valve 9 and a filter 8 are installed sequentially on the drainage tube 7 along the airflow direction. When the one-way valve 9 is closed, it prevents airflow from entering the drainage tube 7. Only when the negative pressure pump is turned on will the one-way valve 9 open. After the smoke in the drainage tube 7 is filtered by the filter 8 to adsorb and filter the odor, the smoke is drawn into the airflow regulating device. The smoke is then discharged in time by controlling the exhaust flow rate, while maintaining the working pressure of the surgical site.
Claims
1. An airflow regulating device for a medical external drainage device, characterized in that: It includes a drainage shell (1), an adjustment cover plate (2), an air guide tube (4), and an adjustment sleeve (5); The drainage housing (1) includes a cavity and an outlet connector (1-2) and an inlet connector (1-1) at both ends. The adjusting sleeve (5) is installed inside the drainage housing (1) and located on one side of the exhaust chamber (1-6). One side of the air guide pipe (4) is sealed and installed at the inlet chamber (1-5) of the drainage housing (1) and communicates with the inlet connector (1-1). The other side is sealed and installed on the adjusting sleeve (5). The end of the air guide pipe (4) located in the exhaust chamber (1-6) has a sealing end face. The air guide pipe (4) has a radial exhaust hole (4-2) on the pipe wall near the sealing end face. The adjusting cover plate (2) set on the drainage housing (1) is connected to the air guide pipe (4) and carries... The air guide pipe (4) moves axially; the adjusting sleeve (5) is provided with an axial air guide groove (5-1) on the hole wall on one side of the exhaust chamber (1-6), and the air guide groove (5-1) is connected to the air outlet connector (1-2). The air guide groove (5-1) is a groove with a gradually expanding exhaust cross section in the airflow path. The exhaust hole (4-2) on the air guide pipe (4) is set at the air guide groove (5-1) of the adjusting sleeve (5). When the exhaust hole (4-2) moves from the inside of the air guide groove (5-1) to the outside, the exhaust volume gradually increases. When the exhaust hole (4-2) of the air guide pipe (4) moves beyond the air guide groove (5-1) and connects with the hole wall of the adjusting sleeve (5), it is in the exhaust closed state.
2. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The air guide groove (5-1) on the adjusting sleeve (5) is a trapezoidal groove, which gradually expands from the inside to the end face of the adjusting sleeve (5) along the depth and width of the groove.
3. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The air guide groove (5-1) on the adjusting sleeve (5) is a rectangular groove, which gradually expands from the inside to the end face of the adjusting sleeve (5) along the depth of the groove.
4. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The air guide groove (5-1) on the adjusting sleeve (5) is a semi-arc groove, which gradually expands from the inside to the end face of the adjusting sleeve (5) and forms a semi-conical groove.
5. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The air intake chamber (1-5) of the drainage housing (1) is provided with a guide tube (1-7). The air guide tube (4) is provided with sealing grooves on both sides. One side of the air guide tube (4) is installed on the guide tube (1-7) by a sealing ring (3) provided in the sealing groove, and the other side of the air guide tube (4) is installed on the adjusting sleeve (5) by a sealing ring (3) provided in the sealing groove.
6. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The drainage housing (1) is provided with an axial limiting groove. The inner and outer sides of the adjusting cover plate (2) are respectively provided with an inner lever (2-3) and an outer lever (2-1). The inner lever (2-3) is set in the limiting groove of the drainage housing (1) and is connected to the connecting part (4-1) in the middle of the air guide tube (4). The surface of the outer lever (2-1) is provided with an anti-slip concave-convex surface.
7. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The suction connector (1-1) is provided with an expanding conical hole through which airflow passes and is connected to the guide tube (1-7). The outer periphery of the suction connector (1-1) is provided with at least one first anti-detachment protrusion ring to limit the drainage tube. The air guide groove (5-1) of the adjusting sleeve (5) is connected to the air outlet connector (1-2) with an expanding conical hole through which airflow passes. The outer periphery of the air outlet connector (1-2) is provided with at least one second anti-detachment protrusion ring to limit the negative pressure tube.
8. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The drainage shell (1) has an elliptical cross-section on its outer periphery, and the drainage shell (1) has a transitional arc in the middle to divide the drainage shell (1) into two ellipses of different sizes. The drainage shell (1) has anti-slip convex and concave strips (1-4) on the outer periphery of the larger ellipse on the suction side.
9. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The drain housing (1) is provided with a fixed mark (1-3) on one side of the adjusting cover plate (2). The adjusting cover plate (2) is provided with multiple position marks (2-2), and each position mark (2-2) corresponds to a different exhaust section on the air guide groove (5-1).
10. The airflow regulating device for a medical external drainage device according to claim 1, characterized in that: The suction connector (1-1) of the drainage housing (1) is connected to the drainage pipe (7), and a one-way valve (9) and a filter (8) are installed on the drainage pipe (7) in sequence along the airflow direction.