CN110613866A - Negative pressure drainage device capable of monitoring and adjusting pressure in bottle - Google Patents
Negative pressure drainage device capable of monitoring and adjusting pressure in bottle Download PDFInfo
- Publication number
- CN110613866A CN110613866A CN201910890875.6A CN201910890875A CN110613866A CN 110613866 A CN110613866 A CN 110613866A CN 201910890875 A CN201910890875 A CN 201910890875A CN 110613866 A CN110613866 A CN 110613866A
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- negative pressure
- bottle
- module
- motor
- drainage
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- A61M1/0023—
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/74—Suction control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3341—Pressure; Flow stabilising pressure or flow to avoid excessive variation
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
Abstract
The invention relates to a negative pressure drainage device capable of monitoring and adjusting the pressure in a bottle, which comprises: negative pressure drainage ware body, negative pressure controlling means, negative pressure drainage ware body include: the vacuum-pumping vacuum bottle comprises a rigid bottle body with an inner cavity, a drainage tube communicated with the inner cavity of the bottle body and a vacuum-pumping motor, wherein the vacuum-pumping motor is used for vacuumizing the inner cavity of the bottle body to form negative pressure; the negative pressure control device comprises: the device comprises a micro control unit, a power supply module, a sensor module, a motor control module, an indicator light module and a gear control switch module. The negative pressure drainage device has strong adaptability, and can better meet the drainage requirements of negative pressures with different pressure values; a one-way valve is arranged in the drainage tube or at the outlet of the drainage tube to prevent the liquid in the bottle body from overflowing or flowing backwards after being fully pumped; the backflow prevention device prevents liquid in the bottle body from entering the motor to burn out the circuit when the bottle body is inclined; simple structure, convenient operation, low economic cost and easy large-scale popularization and application.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a negative pressure drainage device capable of monitoring and adjusting the pressure in a bottle, which can realize multi-gear pressure adjustment and automatically control the starting or stopping of a motor by monitoring the pressure value in the bottle.
Background
At present, in the field of medical clinical, postoperative wound surface negative pressure drainage has been widely popularized and applied, and is mainly used for thyroid, mammary, trauma surgery and the like, the wounds of body parts of the operations are large, the wound surface has more bleeding and seepage, effective wound surface nursing is realized through the negative pressure drainage, and the negative pressure drainage has great practical significance for wound healing, and prevention of complications such as flap necrosis, wound infection, tumor recurrence and the like.
The traditional disposable spring type negative pressure drainage device and the silicon rubber negative pressure suction ball have small negative pressure value and cannot be adjusted, after the negative pressure disappears, a negative pressure drainage disc needs to be manually extruded or replaced by a new negative pressure drainage disc to cause resource waste, and the negative pressure value is difficult to moderate and is easy to leak air; during the period, the problems of blockage of the drainage tube and the like can also occur, and the postoperative recovery is influenced. Patent CN204890724U discloses a portable electronic negative pressure drainage ware, provides the negative pressure through setting up the vacuum pump to the bottle evacuation, can produce powerful negative pressure, sustainable pressurization, negative pressure duration is long automatically. However, the negative pressure of the medical apparatus is generally divided into low pressure, medium pressure and high pressure, and only one-gear negative pressure pumping mode is adopted, so that the medical apparatus is very inconvenient in clinical use and has poor adaptability; in addition, the problem of no protection of the circuit under the states of blockage of the drainage tube and leakage of the electric negative pressure equipment still exists, and potential safety hazards exist for patients.
Disclosure of Invention
In order to solve the technical problems, the invention provides a negative pressure drainage device capable of monitoring and adjusting the pressure in a bottle, which can be provided with a low-pressure, medium-pressure and high-pressure three-gear switch to facilitate the adjustment of the negative pressure value in the bottle; a one-way valve is arranged in the drainage tube or at the outlet of the drainage tube to prevent the liquid in the bottle body from overflowing or flowing backwards after being fully pumped; the invention discloses a reverse flow prevention device which is arranged at a gas outlet and a gas pressure monitoring hole and prevents liquid in a bottle body from flowing backwards to burn out a circuit, and adopts the following technical scheme:
a negative pressure drainage device capable of monitoring and regulating pressure in a bottle, comprising: negative pressure drainage ware body, negative pressure controlling means, negative pressure drainage ware body include: the vacuum-pumping vacuum bottle comprises a rigid bottle body with an inner cavity, a drainage tube communicated with the inner cavity of the bottle body and a vacuum-pumping motor, wherein the vacuum-pumping motor is used for vacuumizing the inner cavity of the bottle body to form negative pressure;
the negative pressure control device comprises: the device comprises a micro control unit, a power supply module, a sensor module, a motor control module, an indicator light module and a gear control switch module; the micro control unit is respectively and electrically connected with the sensor module, the motor control module, the indicator light module and the gear control switch module, and is used for realizing sensor data acquisition, gear control switch signal acquisition, gear indicator light control and motor start/stop control;
the sensor module is used for collecting pressure values in the rigid bottle body, the power supply module is used for supplying power to the negative pressure control device, the motor control module is used for controlling the starting or stopping of the vacuum motor, the gear control switch module is used for selecting a current negative pressure gear, and the indicator light module is used for indicating the currently selected negative pressure gear;
the drainage tube is communicated with the inner cavity of the bottle body through a one-way valve.
The invention has the beneficial effects that:
1) the invention realizes different negative pressure selection and control through the gear control switch, has strong adaptability and can better meet the drainage requirements of negative pressure with different pressure values;
2) according to the invention, the one-way valve is arranged in the drainage tube or at the outlet of the drainage tube, so that the liquid in the bottle body is prevented from overflowing or flowing backwards after being fully pumped;
3) the check valve is arranged on the motor connecting pipe to prevent gas from flowing backwards; the negative pressure in the bottle is unstable, and the gas outlet and the air pressure monitoring hole are provided with the anti-reflux device, so that the liquid in the bottle is prevented from entering the motor to burn out the circuit when the bottle is inclined.
4) The invention has simple structure, convenient operation, low economic cost and easy large-scale popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic circuit diagram of a negative pressure control device according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a flow diverter according to one embodiment of the present invention;
fig. 3 is a schematic view illustrating the structure of components in the bottle cap according to an embodiment of the present invention;
FIG. 4 illustrates an operator panel deployment diagram of one embodiment of the present invention;
FIG. 5 illustrates a circuit board layout diagram according to an embodiment of the present invention;
FIG. 6 illustrates a schematic view of the vacuum motor connection according to an embodiment of the present invention;
FIG. 7 is a schematic structural view illustrating an anti-reflux device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram illustrating a through hole formed in the bottom of an outer cylinder of the backflow prevention device according to an embodiment of the present invention.
In the figure, 1-a rigid bottle body, 2-a bottle cap, 3-a support seat, 4-a lifting rope, 5-a drainage tube, 6-a one-way valve, 7-an anti-reflux device, 8-a sealing ring, 9-a vacuum-pumping motor, 10-a storage battery, 11-a gear control switch, 12-a pressure indicator lamp, 13-a power switch, 14-a circuit board, 15-a check valve, 16-a connecting tube, 17-a power input connector, 18-a power output connector, 19-a microcontroller, 20-a pressure sensor, 21-a battery sheet, 22-an electric wire, 23-an outer cylinder, 24-a buoy, 25-a sealing gasket, 26-a gas outlet, 27-a gas monitoring hole, 28-a through hole, 29-a vertical shaft and 30-holes.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
A negative pressure drainage device capable of monitoring and regulating pressure in a bottle, comprising: negative pressure drainage ware body, negative pressure controlling means, negative pressure drainage ware body include: the vacuum-pumping vacuum bottle comprises a rigid bottle body with an inner cavity, a drainage tube and a vacuum-pumping motor, wherein the drainage tube is communicated with the inner cavity of the bottle body;
the negative pressure control device comprises: the device comprises a micro control unit, a power supply module, a sensor module, a motor control module, an indicator light module and a gear control switch module. Fig. 1 is a schematic circuit diagram of a negative pressure control device according to an embodiment of the present invention. The micro control unit is respectively electrically connected with the sensor module, the motor control module, the indicator light module and the gear control switch module, and is used for realizing sensor data acquisition, gear control switch signal acquisition, gear indicator light control and motor start/stop control. The sensor module is used for collecting a pressure value in the rigid bottle body; the power module is used for supplying power to the negative pressure control device, the motor control module is used for controlling the starting or stopping of the vacuumizing motor, the gear control switch module is used for selecting a current negative pressure gear, and the indicator light module is used for indicating the currently selected negative pressure gear.
The micro control unit can set specific low pressure value, medium pressure value and high pressure value in advance, and a low pressure sensing threshold, a medium pressure sensing threshold and a high pressure sensing threshold, and is matched with the gear control switch module to realize the monitoring and adjustment of the pressure in the bottle. The method by which the described micro-control unit monitors and regulates the pressure in the bottle is prior art and will not be described in detail here.
The sensor module can be a pressure sensor commonly used in the market.
Further, the negative pressure value that the sensor module gathered can indicate through the pilot lamp: and after the specific pressure value is detected, comparing and judging with a preset pressure value, and if the pressure value is lower than the preset pressure value, turning on the lamp, and turning off the lamp after the preset pressure value is reached. Or, the external digital display module directly displays the current pressure value in the bottle.
The gear control switch module is set to be adjustable in low-voltage, medium-voltage and high-voltage three gears and correspondingly provided with a gear lamp for prompting the current gear. In the field of medical appliances, if the negative pressure in a bottle is 0 to-20 kpa, the bottle is defined as low pressure; when the negative pressure in the bottle is-20 to-60 kpa, the negative pressure is the middle pressure; when the negative pressure in the bottle is less than-60. kpa, the bottle is high pressure. Because the requirement of different department operations on drainage pressure is different, the drainage is thorough under the condition of ensuring safety and minimum injury to the muscle tissue of a patient, and the drainage pressure is required to be adjusted according to specific conditions in the drainage. The gear control switch module can be provided with a protective cap or/and marked on the bottle body obviously to prevent gear misoperation.
The invention relates to a negative pressure drainage device capable of monitoring and adjusting the pressure in a bottle, which comprises the following working processes: the power switch is turned on, the gear control switch is pressed to select an adaptive negative pressure gear, the corresponding gear lamp is turned on according to the selected low pressure gear, medium pressure gear or high pressure gear, the pressure sensor senses and collects the pressure value in the bottle, when the pressure value is not in accordance with the specified numerical range, the micro control unit controls the vacuumizing motor to be turned on, and the vacuumizing motor is continuously pumped to the set pressure value or stops working when the vacuumizing is continuously pumped for 10 minutes but does not reach the set pressure value. And (4) the system enters a low power consumption mode, the system waits for 1 hour to work once, the system continuously checks the pressure value, and whether to pump air or not is determined according to the pressure value. The setting of the specific continuous air-extracting time and the low-power consumption waiting time can be adjusted according to the specific application requirements.
Furthermore, the power module adopts a storage battery to supply power for the negative pressure control device. In the embodiment of the invention, because the problem of sterilization before product delivery is considered, if the product is a rechargeable battery, explosion can occur at high sterilization temperature, so that the product before sterilization is a battery box, and the storage battery can be mounted when in use, and the battery can be a common storage battery or a rechargeable storage battery.
As shown in fig. 2, a schematic structural diagram of a flow diverter according to one embodiment of the invention is exemplarily shown; as shown in fig. 3, a schematic structural diagram of components in the bottle cap according to an embodiment of the present invention is exemplarily shown. In the practical example, two gears of low pressure and medium pressure are provided for selection. A negative pressure drainage device capable of monitoring and regulating pressure in a bottle, comprising: the device comprises a rigid bottle body 1, a bottle cap 2, a supporting seat 3, a lifting rope 4, a drainage tube 5, a one-way valve 6, an anti-reflux device 7, a sealing ring 8, a vacuum-pumping motor 9, a storage battery 10, a circuit board 14, a check valve 15 and a connecting pipe 16;
in the embodiment, a cavity is arranged in the bottle cap 2, a supporting seat 3 is arranged below the cavity, the rigid bottle body 1 is screwed with the supporting seat 3 through threads, and a sealing ring 8 is arranged in an annular compression joint ring of the rigid bottle body 1 and the supporting seat 3; the lifting rope 4 is used for hanging the negative pressure drainage device at positions such as nursing sickbeds and the like, and the bottle body can be ensured to be placed in the forward direction in a hanging state. A check valve 15 is installed on a connection pipe 16 connected to the vacuum motor 9. The inner cavity of the bottle cap 2 is provided with a circuit board 14 and a vacuum-pumping motor 9.
As shown in fig. 4, an operation panel deployment diagram of an embodiment of the present invention is exemplarily given; as shown in fig. 5, a schematic diagram of a circuit board layout according to an embodiment of the present invention is exemplarily shown; as shown in fig. 6, a schematic diagram of the connection of the vacuum motor according to an embodiment of the present invention is exemplarily shown. In this embodiment, a power input connector 17, a power output connector 18, a microcontroller 19, a pressure sensor 20, a power switch 13, a shift control switch 11 and a pressure indicator lamp 12 are distributed on the circuit board 14, a power supply installation groove is further formed in the inner cavity of the bottle cap 2, battery pieces 21 are arranged at two ends of the power supply installation groove, a storage battery 10 is installed in the power supply installation groove, two poles of the storage battery 10 are in contact with the battery pieces 21, and the battery pieces 21 are further connected with the power input connector 17 on the circuit board 14 through electric wires 22. The power switch 13, the gear control switch 11 and the pressure indicator lamp 12 are externally displayed outside the bottle cap 2 through small holes formed in the bottle cap 2. In this embodiment, gear control switch 11 sets up two gears of low pressure, middling pressure, opens switch 13, selects low pressure or middling pressure through gear control switch 11, and corresponding low pressure pilot lamp or middling pressure pilot lamp light, realizes the monitoring and the regulation of negative pressure drainage ware bottle internal pressure through microcontroller 19.
The lower surface of the bottle cap 2 is provided with a drainage inlet, a gas outlet 26 and a gas pressure monitoring hole 27, wherein the drainage inlet is used for installing a drainage tube 5, and the drainage inlet is provided with a one-way valve 6; the gas outlet 26 is connected with the vacuum-pumping motor 9 through the connecting pipe 16, and the vacuum-pumping motor 9 is connected with the power input joint 17; the air pressure monitoring hole 27 is connected to the pressure sensor 20.
The gas outlet 26 and the gas pressure monitoring hole 27 on the back of the support seat 3 are provided with a backflow preventing device 7. As shown in fig. 7, a schematic structural diagram of a backflow prevention device according to an embodiment of the present invention is exemplarily shown; as shown in fig. 8, a schematic structural diagram of the backflow prevention device according to an embodiment of the present invention is exemplarily shown, in which a through hole is formed in the bottom of the outer cylinder. The anti-reflux device 7 is composed of an outer cylinder 23 and a buoy 24, wherein the bottom of the outer cylinder 23 is provided with a through hole 28, the center inside the bottom of the outer cylinder 23 is provided with a vertical shaft 29, the center of the buoy 24 is provided with a hole 30 to just accommodate the vertical shaft 29, the upper end of the hole 30 is provided with a sealing gasket 25, the buoy 24 can move up and down along the vertical shaft 29, and the size of the sealing gasket 25 is subject to the purpose of simultaneously sealing the gas outlet 26 and the gas pressure monitoring hole 27. The backflow prevention device prevents liquid in the bottle body from entering the motor to burn out the circuit when the bottle body inclines.
Furthermore, in the embodiment of the invention, the circuit board is additionally provided with reverse connection prevention protection, so that the reverse connection power supply can be ensured not to damage the circuit board.
Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A negative pressure drainage device capable of monitoring and regulating pressure in a bottle, comprising: negative pressure drainage ware body, negative pressure controlling means, negative pressure drainage ware body include: rigid bottle with inner chamber, with drainage tube and the evacuation motor of bottle inner chamber intercommunication, the evacuation motor be used for forming the negative pressure to the evacuation of bottle inner chamber, its characterized in that:
the negative pressure control device comprises: the device comprises a micro control unit, a power supply module, a sensor module, a motor control module, an indicator light module and a gear control switch module; the micro control unit is respectively and electrically connected with the sensor module, the motor control module, the indicator light module and the gear control switch module, and is used for realizing sensor data acquisition, gear control switch signal acquisition, gear indicator light control and motor start/stop control;
the sensor module is used for collecting pressure values in the rigid bottle body, the power supply module is used for supplying power to the negative pressure control device, the motor control module is used for controlling the starting or stopping of the vacuum motor, the gear control switch module is used for selecting a current negative pressure gear, and the indicator light module is used for indicating the currently selected negative pressure gear;
the drainage tube is communicated with the inner cavity of the bottle body through a one-way valve.
2. The negative pressure flow diverter according to claim 1, wherein the value of the negative pressure collected by the sensor module is indicated by an indicator light; or, the external digital display module directly displays the current pressure value in the bottle.
3. The negative pressure flow diverter according to claim 2, wherein the gear control switch module is adjustable in three gears of low voltage, medium voltage and high voltage, and is provided with a gear lamp for indicating the current gear.
4. The negative pressure flow diverter according to claim 3, wherein the gear control switch module is provided with a protective cap or/and marked on the bottle body to prevent gear misoperation.
5. The negative pressure flow diverter of claim 4, wherein the power module supplies power to the negative pressure control device by using a storage battery.
6. The negative pressure flow diverter of any one of claims 1-5, comprising: the device comprises a rigid bottle body (1), a bottle cap (2), a supporting seat (3), a drainage tube (5), a one-way valve (6), a sealing ring (8), a vacuum-pumping motor (9), a storage battery (10), a battery piece (21) and a circuit board (14);
a cavity is arranged in the bottle cap (2), a supporting seat (3) is arranged below the bottle cap, the rigid bottle body (1) is screwed with the supporting seat (3) through threads, and a sealing ring (8) is arranged in an annular compression joint ring of the rigid bottle body (1) and the supporting seat (3);
the vacuum bottle cap comprises a bottle cap inner cavity, a circuit board (14) and a vacuumizing motor (9) are arranged in the bottle cap inner cavity, a power input connector (17), a power output connector (18), a microcontroller (19), a pressure sensor (20), a power switch (13), a gear control switch (11) and a pressure indicator lamp (12) are distributed on the circuit board (14), a power supply installation groove is further formed in the bottle cap inner cavity, battery pieces (21) are arranged at two ends of the power supply installation groove, a storage battery (10) is installed in the power supply installation groove, two poles of the storage battery (10) are in contact with the battery pieces (21), and the battery pieces (21) are further connected with the power input connector (17) on the circuit board (14;
the lower surface of the bottle cap (2) is provided with a drainage inlet, a gas outlet (26) and a gas pressure monitoring hole (27), wherein the drainage inlet is used for installing a drainage tube (5), and the drainage inlet is provided with a one-way valve (6); the gas outlet (26) is connected with a vacuum-pumping motor (9) through a connecting pipe (16), and the vacuum-pumping motor (9) is connected with a power input joint (17); the air pressure monitoring hole (27) is connected with the pressure sensor (20).
7. The negative pressure flow diverter according to claim 6, characterized in that a backflow prevention device (7) is installed at the gas outlet (26) and the gas pressure monitoring hole (27) on the back of the support base (3), the backflow prevention device (7) is composed of an outer cylinder (23) and a buoy (24), wherein a through hole (28) is formed in the cylinder bottom of the outer cylinder (23), a vertical shaft (29) is arranged in the center of the cylinder bottom of the outer cylinder (23), a hole (30) is formed in the center of the buoy (24) to just accommodate the vertical shaft (29), a sealing gasket (25) is installed at the upper end of the hole (30), the buoy (24) can move up and down along the vertical shaft (29), and the size of the sealing gasket (25) is based on the fact that the gas outlet (26) and the gas pressure monitoring hole (27) can be simultaneously sealed.
8. The negative pressure flow diverter of claim 7, characterized in that a lifting rope (4) is arranged at the center of the upper surface of the bottle cap (2) and used for hanging the negative pressure flow diverter; a check valve (15) is mounted on a connection pipe (16) connected to the vacuum motor (9).
9. The negative pressure flow diverter according to claim 8, characterized in that the power switch (13), the gear control switch (11) and the pressure indicator light (12) are externally displayed outside the bottle cap (2) through a small hole arranged on the bottle cap (2).
10. The negative pressure flow diverter of claim 9, wherein the circuit board adds protection against reverse connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890875.6A CN110613866A (en) | 2019-09-19 | 2019-09-19 | Negative pressure drainage device capable of monitoring and adjusting pressure in bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890875.6A CN110613866A (en) | 2019-09-19 | 2019-09-19 | Negative pressure drainage device capable of monitoring and adjusting pressure in bottle |
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| Publication Number | Publication Date |
|---|---|
| CN110613866A true CN110613866A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910890875.6A Pending CN110613866A (en) | 2019-09-19 | 2019-09-19 | Negative pressure drainage device capable of monitoring and adjusting pressure in bottle |
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| CN (1) | CN110613866A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150890A (en) * | 2020-01-20 | 2020-05-15 | 西南医科大学附属医院 | Adjustable full-automatic negative pressure drainage device |
| CN117838959A (en) * | 2024-03-08 | 2024-04-09 | 吉林省沃鸿医疗器械制造有限公司 | Electric negative pressure drainage device |
-
2019
- 2019-09-19 CN CN201910890875.6A patent/CN110613866A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111150890A (en) * | 2020-01-20 | 2020-05-15 | 西南医科大学附属医院 | Adjustable full-automatic negative pressure drainage device |
| CN117838959A (en) * | 2024-03-08 | 2024-04-09 | 吉林省沃鸿医疗器械制造有限公司 | Electric negative pressure drainage device |
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