CN215584964U

CN215584964U - Negative pressure sealing drainage device with pressure change monitoring function

Info

Publication number: CN215584964U
Application number: CN202121007895.3U
Authority: CN
Inventors: 张颖
Original assignee: Affiliated Hospital Of Yunnan University
Current assignee: Affiliated Hospital Of Yunnan University
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2022-01-21
Anticipated expiration: 2031-05-12

Abstract

The utility model discloses a negative pressure closed drainage device capable of monitoring pressure change, which comprises foam filler, a semi-permeable membrane, a drainage tube and a liquid collecting bottle, wherein one end of the drainage tube is embedded in the foam filler, the other end of the drainage tube is communicated with a liquid inlet of the liquid collecting bottle, and the upper part of the liquid collecting bottle is provided with a gas introducing port connected with a negative pressure source; still including surveying buret, pressure sensor, controller, reputation siren, survey buret one end and bury in the foam filler or with the front end intercommunication of drainage tube and the measurement mouth intercommunication of the other end and pressure sensor, pressure sensor's signal end is connected with the input electricity of controller, and reputation siren is connected with the signal output part electricity of master controller. By arranging the measuring tube and the pressure sensor, the drainage unsmooth problem caused by sealing and drainage liquid blockage is solved, the risk of secondary infection caused by accumulation of tissue exudate on a wound surface due to overhigh negative pressure and untight sealing caused by pipeline blockage can be effectively avoided, and the device has the characteristics of simple structure, safety, reliability and low patrol workload.

Description

Negative pressure sealing drainage device with pressure change monitoring function

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a negative pressure closed drainage device which is simple in structure, safe, reliable, low in patrol workload and capable of monitoring pressure changes.

Background

The negative pressure closed drainage (VSD) technique is to fill the wound surface formed after the defect, infection and necrosis of the skin or soft tissue of the organism with the foam of polyvinyl alcohol hydrated seaweed salt, to serve as the medium between the wound surface and the drainage tube, to change the traditional point drainage into the all-round drainage, to cover and close the whole wound surface and the cavity gap with the biological semi-transparent film as the full sealing material to isolate the drainage area from the outside, and to connect the drainage tube with the negative pressure source to form a drainage system. The whole wound surface contacted with the auxiliary materials is in a high-efficiency drainage state of closed negative pressure on the whole surface, so that seepage and liquefied necrotic tissues in the wound surface and lacuna are promoted to be discharged out of the body in time, the infection chance between the wound surface and the external environment is isolated, the negative pressure condition can promote the increase of blood flow, the synthesis of protein and the growth of granulation, the closure of the infected lacuna and the healing of the infected wound surface can be obviously accelerated, the application of antibiotics is greatly reduced, the occurrence of cross infection in a hospital is effectively reduced, the hospitalization time is shortened, the pain of a patient is reduced, and the workload of medical care personnel is reduced. Because the negative pressure closed drainage has the outstanding advantages compared with the traditional drainage, the negative pressure closed drainage is widely applied to the treatment of large-area trauma of orthopedics department, skin defect, bone exposure, chronic osteomyelitis and other diseases.

However, negative pressure closed drainage still has the following problems: 1. massive drainage matters of the wound surface can still enter the drainage tube, so that the blockage of a pipeline is easily caused under specific adjustment to cause unsmooth drainage, and the overhigh negative pressure of the wound surface is caused, so that the normal blood circulation of the wound surface is influenced, and the medical staff is required to perform 24-hour patrol, so that the workload is large; 2. the semi-permeable membrane causes the untight sealing of the drainage area due to various reasons, if the drainage area is not found and treated in time, the tissue exudate can be accumulated on the wound surface to cause secondary infection; 3. for more serious wounds, due to more necrotic tissues and at least larger drainage amount, the liquid collecting bottle is easy to be frequently replaced, so that the workload of medical workers is larger, and liquid is sucked into a central negative pressure source or an electric negative pressure source to damage a machine due to untimely replacement; 4. the existing negative pressure closed drainage is continuous constant pressure closed drainage, and the continuous negative pressure suction can increase the pain of part of patients and increase the discomfort of the patients; the continuous constant pressure closed drainage can also cause certain compressive injury to the skin around the wound surface, thereby delaying the convergence and healing of the wound surface. In order to solve the problems of pipeline blockage and untight sealing in the negative pressure closed drainage, a pressure sensor is arranged below a foam filler in the prior art, a pressure signal is transmitted to an external microprocessor through the pressure sensor, and drainage and alarm are controlled after comparison; however, it is seen that, because the existing pressure sensor is difficult to miniaturize, how to insert the pressure sensor with small volume under the foam padding is a difficult problem. Therefore, a first pressure sensor is arranged on the negative pressure pipeline, a pipeline with one end communicated with air and the other end plugged into the lower part of the foam filler is additionally arranged, then a second pressure sensor is arranged on the pipeline, and the controller compares the pressure difference between the first pressure sensor and the second pressure sensor to realize pipeline blockage alarm; although the scheme solves the problem that the pressure sensor is difficult to plug below the foam filler, the structure is complex, and the monitoring failure can be caused by the fault of any one pressure sensor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a negative pressure closed drainage device which is simple in structure, safe, reliable, low in patrol workload and capable of monitoring pressure changes.

The utility model is realized by the following steps: the device comprises foam filler, a semipermeable membrane, a drainage tube and a liquid collecting bottle, wherein one end of the drainage tube is embedded in the foam filler below the semipermeable membrane, the other end of the drainage tube is communicated with a liquid inlet of the liquid collecting bottle, and a gas introducing port connected with a negative pressure source is arranged at the upper part of the liquid collecting bottle; the device is characterized by further comprising a measuring tube, a pressure sensor, a controller and an acousto-optic alarm, wherein one end of the measuring tube is embedded in the foam filler or is communicated with the front end of the drainage tube, the other end of the measuring tube is communicated with a measuring port of the pressure sensor, the signal end of the pressure sensor is electrically connected with the signal input end of the controller, and the acousto-optic alarm is electrically connected with the signal output end of the controller.

The utility model has the beneficial effects that:

1. according to the utility model, the measuring tube parallel to the drainage tube is arranged, the pressure sensor is connected on the measuring tube, and the controller can judge whether the pressure of the drainage area exceeds the limit according to the numerical value of the pressure sensor to determine the alarm of the acousto-optic alarm, so that the problem that the pressure sensor with a larger volume is difficult to place foam filler is solved, the problem of poor drainage caused by poor sealing and drainage liquid blockage management is solved, the risk of secondary infection caused by accumulation of tissue exudate on a wound surface due to overhigh negative pressure and poor sealing caused by pipeline blockage can be effectively avoided, and the workload of medical workers and the unnecessary tension of patients are remarkably reduced.

2. The utility model can complete the monitoring of the untight sealing of the drainage area and the blockage of the drainage liquid of the pipeline by only one pressure sensor, has simpler structure compared with the scheme of double pressure sensors in the prior art, and can effectively improve the reliability of the system.

In conclusion, the utility model has the characteristics of simple structure, safety, reliability and low patrol workload.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a second schematic view of the cross-sectional structure of FIG. 1;

in the figure: 1-foam filler, 2-semipermeable membrane, 3-drainage tube, 4-liquid collecting bottle, 5-measuring tube, 6-pressure sensor, 7-controller, 8-acousto-optic alarm, 9-control box, 10-liquid level sensor, 11-solenoid valves I, 12-three-way pipe, 13-solenoid valves II, 14-air filtration, 15-regulating button, 16-display screen and 17-one-way valve.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not intended to limit the utility model in any way, and any variations or modifications which are based on the teachings of the utility model are intended to be within the scope of the utility model.

As shown in figure 1, the utility model comprises a foam filler 1, a semipermeable membrane 2, a drainage tube 3 and a liquid collecting bottle 4, wherein one end of the drainage tube 3 is embedded in the foam filler 1 below the semipermeable membrane 2, the other end of the drainage tube is communicated with a liquid inlet of the liquid collecting bottle 4, and the upper part of the liquid collecting bottle 4 is provided with a gas introducing port connected with a negative pressure source; still including surveying buret 5, pressure sensor 6, controller 7, reputation siren 8, survey the one end of buret 5 and imbed in foam packing 1 or communicate with the front end of drainage tube 3 and the other end and pressure sensor 6's measurement mouth intercommunication, pressure sensor 6's signal end is connected with controller 7's signal input part electricity, reputation siren 8 is connected with controller 7's signal output part electricity.

As shown in fig. 2, the present invention further includes a control box 9, the pressure sensor 6 and the controller 7 are respectively and fixedly disposed in the control box 9, and the sound and light alarm 8 is disposed on the control box 9.

And a wired network unit and/or a wireless network unit which are connected with an alarm terminal of the nurse station through a network are/is further arranged in the control box 9.

The upper part of the liquid collecting bottle 4 is also provided with a liquid level sensor 10 extending inwards, and the signal end of the liquid level sensor 10 is electrically connected with the signal input end of the controller 7. Through level sensor 10, when the liquid level in the liquid collecting bottle 4 was on the high side, controller 7 was receiving the data back of level sensor 10 monitoring, can activate audible-visual annunciator 8 and remind medical personnel and patient people around to change the drainage bottle to can prevent the problem of liquid suck-back damage equipment.

An electromagnetic valve I11 is arranged on a connecting pipeline between the air-entraining port of the liquid collecting bottle 4 and the negative pressure source, a three-way pipe 12 is arranged on one side of the pressure sensor 6 of the measuring pipe 5, the measuring pipe 5 and the pressure sensor 6 are respectively communicated with the three-way pipe 12, an electromagnetic valve II 13 is connected to the rest port of the three-way pipe 12, and the electromagnetic valve I11 and the electromagnetic valve II 13 are respectively and electrically connected with the output end of the controller 7. Through setting up solenoid valve I11 and solenoid valve II 13, both can be as required with lasting negative pressure suction change intermittent type negative pressure suction into to make secretion and waste material that the surface of a wound produced can be abundant, thoroughly, timely drainage, avoided local retention to the suppression of the surface of a wound, can make the seepage of the surface of a wound reduce greatly again, make organism albumen run off reduce, can also control solenoid valve I11 and solenoid valve II 13 through controller 7 break-make in proper order, realize the pipeline internal pressure impact, thereby help blockking up automatic relieving.

And an air filter 14 is connected to a connecting port of the electromagnetic valve II 13, which is far away from the three-way pipe 12.

The control box 9 is further provided with an adjusting button 15 and a display screen 16, the adjusting button 15 is used for adjusting the pressure threshold and/or the interval time, the adjusting button 15 is electrically connected with an input port of the controller 7, and the display screen 16 is electrically connected with an output end of the controller 7.

The drainage tube 3 is provided with a one-way valve 17, so that the risk of secondary infection caused by the backflow of the exudate to the wound surface due to the blockage of a pipeline at the rear end of the liquid collecting bottle 4 can be prevented.

The controller 7 comprises an I/O unit, a storage unit, a comparison unit and a control unit, wherein the I/O unit is electrically connected with the signal end of the pressure sensor 6, and the control unit is electrically connected with the control end of the acousto-optic alarm 8; the comparison unit is in signal connection with the I/O unit and obtains a pressure value of the pressure sensor 6, the comparison unit reads a pressure threshold value in the storage unit and compares the pressure threshold value with the pressure value of the pressure sensor 6, when the pressure value of the pressure sensor 6 is larger than or smaller than the pressure threshold value, the comparison unit sends a preset signal to the control unit, and the control unit sends an alarm triggering signal to the acousto-optic alarm 8 according to the signal of the comparison unit.

The working principle and the working process of the utility model are as follows:

as shown in figure 1, after the blockage occurs, the drainage area is in a negative pressure state, the tissue exudate continuously seeps out to enable the pressure in the drainage area to gradually rise, the pressure sensors 6 on the measuring tube 5 measure the pressure at intervals and send the pressure to the controller 7 after D/A conversion, and when the pressure value received by the controller 7 at one continuous time is gradually increased and exceeds a preset threshold value, the acousto-optic alarm 8 is driven to send a blockage alarm signal. And after the sealing is not tight, the pressure in the diversion area rapidly rises, the pressure sensors 6 on the measuring tube 5 measure the pressure at intervals and send the pressure to the controller 7 after D/A conversion, and when the pressure values received by the controller 7 for a period of time are all higher than a preset threshold value, the acousto-optic alarm 8 is driven to send a leakage alarm signal.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A negative pressure closed drainage device capable of monitoring pressure change comprises a foam filler (1), a semipermeable membrane (2), a drainage tube (3) and a liquid collecting bottle (4), wherein one end of the drainage tube (3) is embedded in the foam filler (1) below the semipermeable membrane (2), the other end of the drainage tube is communicated with a liquid inlet of the liquid collecting bottle (4), and a gas introducing port connected with a negative pressure source is arranged at the upper part of the liquid collecting bottle (4); the device is characterized by further comprising a measuring pipe (5), a pressure sensor (6), a controller (7) and an acousto-optic alarm (8), wherein one end of the measuring pipe (5) is embedded in the foam packing (1) or is communicated with the front end of the drainage pipe (3) and the measuring port of the other end of the measuring pipe is communicated with the pressure sensor (6), the signal end of the pressure sensor (6) is electrically connected with the signal input end of the controller (7), and the acousto-optic alarm (8) is electrically connected with the signal output end of the controller (7).

2. The negative pressure closed drainage device capable of monitoring pressure change according to claim 1, further comprising a control box (9), wherein the pressure sensor (6) and the controller (7) are respectively and fixedly arranged in the control box (9), and the acousto-optic alarm (8) is arranged on the control box (9).

3. The negative pressure closed drainage device with the function of monitoring pressure change according to claim 2, characterized in that a wired network unit and/or a wireless network unit which is connected with an alarm terminal network of a nurse station is/are further arranged in the control box (9).

4. The negative pressure closed drainage device capable of monitoring pressure change according to claim 2 or 3, characterized in that a liquid level sensor (10) extending inwards is further arranged at the upper part of the liquid collecting bottle (4), and a signal end of the liquid level sensor (10) is electrically connected with a signal input end of the controller (7).

5. The negative pressure closed drainage device capable of monitoring pressure change according to claim 2 or 3, characterized in that a connection pipeline between the air inlet of the liquid collecting bottle (4) and the negative pressure source is provided with a solenoid valve I (11), the measuring tube (5) is provided with a three-way pipe (12) at one side of the pressure sensor (6), the measuring tube (5) and the pressure sensor (6) are respectively communicated with the three-way pipe (12), the remaining port of the three-way pipe (12) is connected with a solenoid valve II (13), and the solenoid valve I (11) and the solenoid valve II (13) are respectively electrically connected with the output end of the controller (7).

6. The negative pressure closed drainage device capable of monitoring pressure change according to claim 5, characterized in that an air filter (14) is connected to a connection port of the electromagnetic valve II (13) far away from the joint of the three-way pipe (12).

7. The negative pressure closed drainage device capable of monitoring pressure change according to claim 5, characterized in that the control box (9) is further provided with an adjusting button (15) for adjusting the pressure threshold and/or the interval time and a display screen (16), the adjusting button (15) is electrically connected with the input port of the controller (7), and the display screen (16) is electrically connected with the output port of the controller (7).

8. The negative pressure closed drainage device with monitoring pressure change according to claim 5, characterized in that a one-way valve (17) is arranged on the drainage tube (3).

9. The negative pressure closed drainage device with the function of monitoring pressure change according to claim 2 or 3, characterized in that the controller (7) comprises an I/O unit, a storage unit, a comparison unit and a control unit, wherein the I/O unit is electrically connected with the signal end of the pressure sensor (6), and the control unit is electrically connected with the control end of the acousto-optic alarm (8); the comparison unit is in signal connection with the I/O unit and obtains a pressure value of the pressure sensor (6), the comparison unit reads a pressure threshold value in the storage unit and compares the pressure value with the pressure value of the pressure sensor (6), when the pressure value of the pressure sensor (6) is larger than or smaller than the pressure threshold value, the comparison unit sends a preset signal to the control unit, and the control unit sends an alarm triggering signal to the sound-light alarm (8) according to the signal of the comparison unit.