CN110339414B - Pressure detection device for blood purification system and medical equipment - Google Patents
Pressure detection device for blood purification system and medical equipment Download PDFInfo
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- CN110339414B CN110339414B CN201910572784.8A CN201910572784A CN110339414B CN 110339414 B CN110339414 B CN 110339414B CN 201910572784 A CN201910572784 A CN 201910572784A CN 110339414 B CN110339414 B CN 110339414B
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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
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
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Abstract
The invention provides a pressure detection device for a blood purification system and medical equipment with the pressure detection device, wherein the pressure detection device comprises an electric control unit, a pressure sensor, a pipeline channel, a liquid sensor and an electromagnetic valve, the pressure sensor, the liquid sensor and the electromagnetic valve are respectively and electrically connected with the electric control unit, the pipeline channel is provided with a low section, the low section is vertically positioned below a first end and a second end of the pipeline channel, the first end of the pipeline channel is communicated with a pipeline of the blood purification system, the second end of the pipeline channel is positioned on the pressure sensor, the liquid sensor is arranged on the low section, and the electromagnetic valve is arranged on the pipeline channel and positioned between the low section and the second end of the pipeline channel. A pressure measurement device for blood purification system detects the state of pressure safety cover in pressure measurement, and pressure measurement device's simple structure just detects accurately, avoids cross infection between the patient to guarantee patient's safety.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a pressure detection device for a blood purification system and medical equipment with the same.
Background
The blood purifying system is used to lead the blood of patient out of body and to eliminate some pathogenic matter in the blood with one purifying device to purify the blood and treat diseases. In the blood purification treatment process, the blood purification system needs to monitor the pressure of different positions of the extracorporeal circulation blood path of a patient so as to prevent the phenomena of air bubbles, blood coagulation, filter damage and the like in the treatment process and ensure the smooth development of the blood purification treatment.
In general, the extracorporeal circulation blood circuit of the blood purification system provides 2 to 5 or more pressure monitoring lines according to different treatment modes, and line interfaces of the pressure monitoring lines can be connected with pressure monitoring ports of medical equipment through conventional luer connectors or customized connectors, so that the purpose that the medical equipment monitors the pressure of different positions of the extracorporeal circulation blood circuit of a patient is achieved. As the pipeline is a disposable consumable material, generally, a pressure protection cover which is consistent with the number of pipeline pressure interfaces is arranged, the pressure protection cover is also called as a disposable air filter and mainly comprises a shell and a filtering membrane, and the pressure protection cover is mainly used for preventing blood (or other liquid) in an extracorporeal circulation blood circuit of a patient from being in direct contact with a pressure monitoring port of medical equipment and preventing cross infection among patients.
At present, the pressure monitoring device for monitoring the pressure of the blood purification system in the market mainly has the following problems:
firstly, most of medical equipment (such as a blood perfusion machine, a blood purifier and the like) adopting a general pipeline or a special pipeline only monitors the pressure of an extracorporeal circulation blood circuit of a patient, and does not monitor whether a pressure protection cover is installed, installed in place or damaged, and if the pressure protection cover is not installed due to negligence in the treatment process of medical staff, cross infection occurs among patients;
although the extracorporeal circulation blood path of the patient is matched with the corresponding pressure protection covers, in the blood purification treatment process, medical personnel operate improperly, and the pressure protection covers are installed, but air enters the pipeline and even the human body due to improper installation (if the pressure protection covers are not screwed up completely), so that thrombus is caused;
and thirdly, even if the pressure protection cover is used correctly, in the blood purification treatment process, blood enters the medical equipment due to damage or breakage of the filter membrane of the pressure protection cover, so that the pressure sensor in the equipment is damaged. Meanwhile, medical staff are difficult to find out that the filtering membrane of the pressure protection cover is damaged in time in the treatment process, so that the medical equipment monitoring port with the blood entering function cannot be maintained and disinfected in time, and follow-up treatment cannot be carried out or cross infection among patients cannot be caused.
Disclosure of Invention
A first object of the present invention is to provide a pressure detection device for a blood purification system, which can detect the state of a pressure protection cover at the same time of pressure detection, and has a simple structure and accurate detection, thereby ensuring the safety of a patient.
A second object of the present invention is to provide a medical apparatus having the above pressure detection device.
In order to achieve the first object of the present invention, the present invention provides a pressure detection device for a blood purification system, including an electronic control unit, a pressure sensor, a pipeline channel, a liquid sensor and a solenoid valve, wherein the pressure sensor, the liquid sensor and the solenoid valve are respectively electrically connected to the electronic control unit, the pipeline channel has a low section, the low section is located below a first end and a second end of the pipeline channel in a vertical direction, the first end of the pipeline channel is communicated with a pipeline of the blood purification system, the second end of the pipeline channel is located on the pressure sensor, the liquid sensor is disposed on the low section, and the solenoid valve is disposed on the pipeline channel and located between the low section and the second end of the pipeline channel.
It can be seen from the above scheme that, in order to ensure the safety of patients and the smooth proceeding of treatment, the pipeline pressure interface of the blood purification system needs to be provided with a pressure protection cover, the pressure protection cover consists of a shell and a filtering membrane, and the pressure protection cover has the main functions of preventing the blood (or other liquid) in the extracorporeal circulation blood path of the patients from leaking and preventing the cross infection among the patients from occurring. And the first end of the pipeline channel of the pressure detection device is communicated with the pipeline of the blood purification system through the pipeline pressure interface of the blood purification system, under the conditions of normal installation and normal use of the pressure protection cover, the filtering membrane of the pressure protection cover can effectively prevent liquid (such as blood and the like) from entering the pipeline channel, only air exists in the pipeline channel, at the moment, the liquid sensor has no signal output, the electric control unit does not receive the signal input of the liquid sensor, the working state of the pressure protection cover is identified to be normal, no liquid enters the pipeline channel, the electric control unit controls the electromagnetic valve to be in an open state, and therefore the pressure sensor can normally carry out pressure detection. When the unexpected damage or when breaking appear in the pressure protection cover, or when blood purification system's pipeline pressure interface does not install the pressure protection cover, or when the pressure protection cover does not install correctly, lead to in blood or other liquid get into the pipe-line passageway through the pressure detection connector, liquid sensor will detect there is liquid and output signal, electric control unit receives liquid sensor's output signal, it has liquid to get into in the pipe-line passageway just to discern, electric control unit control solenoid valve closes this moment, avoid liquid to enter into pipe-line passageway's second end, and then damage pressure sensor. Meanwhile, once the amount of liquid entering the pipeline channel is small, the liquid sensor can not accurately identify and mistakenly think that no liquid enters the pipeline channel, and because the pressure sensor is positioned above the liquid sensor in the vertical direction, a small amount of liquid cannot reach the second end of the pipeline channel and contact the pressure sensor, the situation that the pressure sensor is damaged due to monitoring errors caused by small liquid inlet amount is effectively avoided. When the liquid accumulated on the low section of the pipeline channel is sensed by the liquid sensor, the pressure sensor is positioned above the liquid sensor in the vertical direction, and the accumulated liquid cannot reach the second end of the pipeline channel and contact the pressure sensor, the liquid sensor can accurately identify that the liquid enters the pipeline channel and send a signal, and the electric control unit receives the signal of the liquid sensor and controls the electromagnetic valve to be closed, so that the medical equipment is protected from the liquid. Pressure measurement detects the state of pressure safety cover in pressure measurement, and simple structure and detection are accurate, avoid cross infection between the patient, make patient's treatment go on smoothly, ensure patient's safety.
The pressure detection device further comprises a push rod, an elastic piece and a touch switch, wherein the touch switch is electrically connected with the electric control unit, the push rod can move along the axial direction of the push rod, the first end of the push rod can be pressed against the touch switch, the elastic piece forces the push rod to be far away from the touch switch, and the pressure protection cover of the blood purification system can be pressed against the second end of the push rod.
The further scheme is that the elastic part is a tension spring, the tension spring is sleeved on the ejector rod, one end of the tension spring is connected with the first end of the ejector rod, and the tension spring forces the ejector rod to be far away from the touch switch.
In a further aspect, the trigger switch is a self-reset switch.
According to the scheme, when the pressure protection cover is completely installed in place, the connection sealing performance between the devices is better, once the connection sealing performance between the devices is poor, air can easily enter the extracorporeal circulation blood path of a patient to form bubbles, and thrombus is caused after the air is returned to the body of the patient through the extracorporeal circulation blood path. Therefore, the pressure detection device is also provided with a mandril, an elastic piece and a touch switch so as to detect whether the installation of the pressure protection cover is accurate and in place. When the pressure protection cover is accurately installed in place, the pressure protection cover is pressed against the second end of the ejector rod to force the ejector rod to move towards the touch switch along the axial direction of the ejector rod, so that the first end of the ejector rod is pressed against the touch switch to trigger the touch switch to be closed, the touch switch is communicated with the electric control unit, and the accurate installation of the pressure protection cover is prompted. If the pressure protection cover is not installed in place or is installed inaccurately, the pressure protection cover cannot drive the ejector rod to touch the touch switch, the touch switch is in an open state and cannot be communicated with the electronic control unit, the electronic control unit does not receive a signal for prompting the accurate installation of the pressure protection cover in place, and the pressure protection cover is indicated to be not installed in place accurately, so that the electronic control unit starts corresponding warning and protection actions. It can be seen that whether the pressure protection cover is accurately installed in place or not can be identified in the blood purification treatment preparation stage, the detection precision of the pressure detection device is greatly improved, the treatment of patients can be smoothly carried out, the cross infection among the patients is avoided, and the safety of the patients is ensured.
In a further aspect, the liquid sensor is one of an infrared sensor or an ultrasonic sensor.
In a further scheme, the electric control unit comprises a circuit board, and the pressure sensor and the touch switch are respectively arranged on the circuit board.
According to a further scheme, the pressure detection device further comprises a fixing frame, the fixing frame can be installed on the medical equipment, and the circuit board is installed on the fixing frame.
According to a further scheme, the pressure detection device further comprises a reflection type sensor, and the reflection type sensor is electrically connected with the electronic control unit.
In a further aspect, the reflective sensor is an infrared sensor.
It can be seen from above scheme that medical personnel if do not install the pressure safety cover because of negligence in carrying out blood purification treatment process, will lead to the cross infection to appear between the patient, can not ensure patient's safety. Therefore, the pressure detection device is also provided with a reflective sensor for detecting whether the pressure protection cover is installed. When the pressure protection cover is installed, the pressure protection cover blocks signals emitted by the reflective sensor and reflects the signals back to the reflective sensor, and the reflective sensor detects that the signals return, namely, the electronic control unit prompts that the pressure protection cover is installed. If the protective cover is not installed, the signal emitted by the reflective sensor is not blocked by an object, so that the signal cannot be reflected back to the reflective sensor, and the reflective sensor cannot detect the signal, namely, an alarm signal is output through the electronic control unit. It can be seen that whether the pressure protection cover is installed or not can be identified in the blood purification treatment preparation stage, the detection precision of the pressure detection device is greatly improved, the treatment of patients can be smoothly carried out, the cross infection among the patients is avoided, and the safety of the patients is guaranteed.
In order to achieve the second object of the invention, the invention provides a medical device, which comprises a pressure detection device, wherein the pressure detection device comprises an electric control unit, a pressure sensor, a pipeline channel, a liquid sensor and an electromagnetic valve, the pressure sensor, the liquid sensor and the electromagnetic valve are respectively and electrically connected with the electric control unit, the pipeline channel is provided with a low section, the low section is vertically positioned below a first end and a second end of the pipeline channel, the first end of the pipeline channel is communicated with a pipeline of a blood purification system, the second end of the pipeline channel is positioned on the pressure sensor, the liquid sensor is arranged on the low section, and the electromagnetic valve is arranged on the pipeline channel and positioned between the low section and the second end of the pipeline channel.
It can be seen from the above scheme that, in order to ensure the safety of patients and the smooth proceeding of treatment, the pipeline pressure interface of the blood purification system needs to be provided with a pressure protection cover, the pressure protection cover consists of a shell and a filtering membrane, and the pressure protection cover has the main functions of preventing the blood (or other liquid) in the extracorporeal circulation blood path of the patients from leaking and preventing the cross infection among the patients from occurring. And the first end of the pipeline channel of the pressure detection device is communicated with the pipeline of the blood purification system through the pipeline pressure interface of the blood purification system, under the conditions of normal installation and normal use of the pressure protection cover, the filtering membrane of the pressure protection cover can effectively prevent liquid (such as blood and the like) from entering the pipeline channel, only air exists in the pipeline channel, at the moment, the liquid sensor has no signal output, the electric control unit does not receive the signal input of the liquid sensor, the working state of the pressure protection cover is identified to be normal, no liquid enters the pipeline channel, the electric control unit controls the electromagnetic valve to be in an open state, and therefore the pressure sensor can normally carry out pressure detection. When the unexpected damage or when breaking appear in the pressure protection cover, or when blood purification system's pipeline pressure interface does not install the pressure protection cover, or when the pressure protection cover does not install correctly, lead to in blood or other liquid get into the pipe-line passageway through the pressure detection connector, liquid sensor will detect there is liquid and output signal, electric control unit receives liquid sensor's output signal, it has liquid to get into in the pipe-line passageway just to discern, electric control unit control solenoid valve closes this moment, avoid liquid to enter into pipe-line passageway's second end, and then damage pressure sensor. Meanwhile, once the amount of liquid entering the pipeline channel is small, the liquid sensor can not accurately identify and mistakenly think that no liquid enters the pipeline channel, and because the pressure sensor is positioned above the liquid sensor in the vertical direction, a small amount of liquid cannot reach the second end of the pipeline channel and contact the pressure sensor, the situation that the pressure sensor is damaged due to monitoring errors caused by small liquid inlet amount is effectively avoided. When the liquid accumulated on the low section of the pipeline channel is sensed by the liquid sensor, the pressure sensor is positioned above the liquid sensor in the vertical direction, and the accumulated liquid cannot reach the second end of the pipeline channel and contact the pressure sensor, the liquid sensor can accurately identify that the liquid enters the pipeline channel and send a signal, and the electric control unit receives the signal of the liquid sensor and controls the electromagnetic valve to be closed, so that the medical equipment is protected from the liquid. Medical equipment detects the state of pressure safety cover in pressure detection, and simple structure and detection are accurate, avoid cross infection between the patient, make patient's treatment go on smoothly, ensure patient's safety.
Drawings
FIG. 1 is a partial schematic view of an embodiment of a medical device of the present invention in a blood purification system.
FIG. 2 is a partial cross-sectional view of an embodiment of the medical device of the present invention in a blood purification system.
Fig. 3 is a signal transmission diagram of an embodiment of the medical device of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
The following embodiments are mainly directed to the medical device of the present invention used in a blood purification system, and since the medical device of the present invention employs the pressure detection device of the present invention, the embodiments of the pressure detection device have been described in the description of the embodiments of the medical device.
Referring to fig. 1 and 2, the medical apparatus 1 includes a pressure detecting device mounted on an inner wall of a housing 11, and the housing 11. The pressure detection device comprises an electric control unit, a pressure sensor 34, a pipeline channel 31, a liquid sensor 32 and an electromagnetic valve 33, wherein the pressure sensor 34 is electrically connected with the electric control unit, the liquid sensor 32 is electrically connected with the electric control unit, and the electromagnetic valve 33 is electrically connected with the electric control unit. The first end 311 of the line channel 31 communicates with the line of the blood purification system and the second end 312 of the line channel 31 is located on the pressure sensor 34. Specifically, the first end 311 of the line channel 31 communicates with the line pressure port 4 of the blood purification system through the pressure detection connection port 12 provided on the housing 11. In order to ensure the safety of the patients and the smooth proceeding of the treatment, the pipeline pressure interface 4 of the blood purification system needs to be provided with a pressure protection cover 2, the pressure protection cover 2 is composed of a shell 21 and a filtering membrane (not marked), and the main function of the pressure protection cover is to prevent the blood (or other liquid) in the extracorporeal circulation blood of the patients from directly contacting with the pressure monitoring port 12 of the medical equipment 1, and prevent the cross infection among the patients.
The pipe channel 31 has a low section 313, the low section 313 being located vertically below the first end 311 and the second end 312 of the pipe channel 31. The liquid sensor 32 is disposed on the low level section 313, and the solenoid valve 33 is disposed on the pipe passage 31 between the low level section 313 and the second end 312 of the pipe passage 31, i.e., the liquid sensor 32 is located below the pressure sensor 34 in the vertical direction. In the blood purification treatment process, the positions of the pipeline pressure interfaces 4 of the blood purification system are different, and the liquid in the pipelines is also different, such as blood, filtrate, plasma and the like. Therefore, the liquid sensor 32 can select an infrared sensor for blood detection or an ultrasonic sensor for liquid detection according to the liquid characteristics in the pipeline.
Under the condition that the pressure protection cover 2 is normally installed and used, the filtering membrane of the pressure protection cover 2 can effectively prevent liquid (such as blood and the like) from entering the pipeline channel 31, only air exists in the pipeline channel 31, no signal is output from the liquid sensor 32 at the moment, the electric control unit does not receive the signal input of the liquid sensor 32, the working state of the pressure protection cover 2 is identified to be normal, no liquid enters the pipeline channel 31, the electromagnetic valve 33 is controlled to be in an open state by the electric control unit, and therefore the pressure sensor 34 can normally detect the pressure. When the pressure protection cover 2 is accidentally damaged or broken, or the pressure protection cover 2 is not installed on the pipeline pressure interface 4 of the blood purification system, or the pressure protection cover 2 is not installed correctly, blood or other liquid enters the pipeline channel 31 through the pressure detection connecting port 12, the liquid sensor 32 detects the liquid and outputs a signal, the electronic control unit receives the output signal of the liquid sensor 32, and recognizes that the liquid enters the pipeline channel 31, and at the moment, the electronic control unit controls the electromagnetic valve 33 to be closed, so that the liquid is prevented from entering the second end 312 of the pipeline channel 31, and the pressure sensor 34 is damaged. Meanwhile, the electronic control unit outputs a signal to the medical equipment 1 to start corresponding protection actions (such as stopping the operation of a pump, stopping the work of the whole equipment, powering off, alarming and the like).
The low level section 313 is located below the first end 311 and the second end 312 of the pipeline channel 31 in the vertical direction, the liquid sensor 32 is disposed on the low level section 313, and the pressure sensor 34 is located above the liquid sensor 32 in the vertical direction. Once the amount of liquid entering the pipeline channel 31 is small, the liquid sensor 32 may not be able to accurately identify, and it is mistaken that no liquid enters the pipeline channel 31, because the pressure sensor 34 is located above the liquid sensor 32 in the vertical direction, a small amount of liquid cannot reach the second end 312 of the pipeline channel 31 and contact the pressure sensor 34, thereby effectively avoiding the occurrence of the situation that the pressure sensor 34 is damaged due to a monitoring error caused by a small amount of liquid entering. When the liquid accumulated in the low section 313 of the pipeline channel 31 is sensed by the liquid sensor 32, since the pressure sensor 34 is vertically above the liquid sensor 32, the accumulated liquid cannot reach the second end 312 of the pipeline channel 31 and contact the pressure sensor 34, the liquid sensor 32 can accurately recognize that the liquid enters the pipeline channel 31 and send a signal, and the electronic control unit receives the signal of the liquid sensor 32 and controls the electromagnetic valve 33 to close, so as to protect the medical device 1 from the liquid. The pressure detection device of the medical equipment 1 detects the state of the pressure protection cover 2 when detecting the pressure, has simple structure and accurate detection, avoids cross infection among patients, enables the treatment of the patients to be smoothly carried out, and ensures the safety of the patients.
The pressure detection device also comprises a top rod 36, an elastic piece 37 and a touch switch 35, wherein the touch switch 35 is electrically connected with the electric control unit, and the top rod 36 can move along the axial direction of the electric control unit. The first end 361 of the push rod 36 can press against the trigger switch 35, and the elastic member 37 forces the push rod 36 to move away from the trigger switch 35. The second end 362 of the push rod 36 extends through the housing 11 of the medical device 1 and out of the medical device 1, and the pressure protection cap 2 of the blood purification system can press against the second end 362 of the push rod 36. The elastic member 37 of this embodiment is a tension spring, which is sleeved on the top rod 36 and has one end connected to the first end 361 of the top rod 36 and the other end connected to the inner wall of the housing 11, and the tension spring forces the top rod 36 to move away from the trigger switch 35. The touch switch 35 is a self-reset switch, i.e. a non-self-locking switch, and only when the key is pressed, the touch switch 35 and the electric control unit are in a connected state, the circuit forms a loop, and once the key is released, the circuit is immediately disconnected.
When the pressure protection cover 2 of the pipeline pressure interface 4 of the blood purification system is completely installed in place, the closer the shell 21 of the pressure protection cover 2 is to the outer wall of the shell 11 of the medical device 1, the better the connection tightness between the pressure detection connecting port 12 of the medical device 1 and the pipeline pressure interface 4 of the blood purification system is, and conversely, the farther the shell 21 of the pressure protection cover 2 is from the outer wall of the shell 11 of the medical device 1, the poorer the connection tightness between the pressure detection connecting port 12 of the medical device 1 and the pipeline pressure interface 4 of the blood purification system is, so that air can easily enter the extracorporeal circulation blood path of the patient to form bubbles, and the thrombus is caused after the air is returned to the body of the patient through the extracorporeal circulation blood path. Therefore, the pressure detection device is further provided with a mandril 36, an elastic piece 37 and a touch switch 35 so as to detect whether the pressure protection cover 2 is accurately installed in place or not, and the pipeline pressure interface 4 of the blood purification system is hermetically connected with the pressure detection connecting port 12 of the medical equipment 1. When the pressure protection cover 2 is accurately installed in place, the shell 21 of the pressure protection cover 2 is pressed against the second end 362 of the ejector rod 36, so that the ejector rod 36 is forced to move towards the trigger switch 35 along the axial direction of the ejector rod, the first end 361 of the ejector rod 36 is pressed against the trigger switch 35, the trigger switch 35 is triggered to be closed, the trigger switch 36 is connected with the electric control unit, and therefore the pressure protection cover 2 is prompted to be accurately installed in place, and at the moment, the tension spring is in a stretched state. If the pressure protection cover 2 is not installed in place or is installed inaccurately, the shell 21 of the pressure protection cover 2 cannot drive the ejector rod 36 to touch the touch switch 35, the touch switch 35 is in an open state and cannot be communicated with the electronic control unit, the electronic control unit does not receive a signal for prompting the accurate installation of the pressure protection cover 2 in place, and the signal indicates that the pressure protection cover 2 is not installed in place accurately, so that the electronic control unit starts corresponding warning and protection actions. The tension spring has the function that after the blood purification treatment is finished, the push rod 36 is reset after the pressure protection cover 2 is taken down. It can be seen that whether the pressure protection cover 2 is accurately installed in place or not can be identified in the blood purification treatment preparation stage, the detection is accurate, the treatment of patients can be smoothly carried out, the cross infection among the patients is avoided, and the safety of the patients is guaranteed.
The pressure detection device further comprises a reflective sensor 38, and the reflective sensor 38 is electrically connected with the electronic control unit. Preferably, the reflective sensor 38 is an infrared sensor. Medical personnel are carrying out blood purification treatment in-process, if do not install pressure safety cover 2 because of the negligence, will lead to cross infection to appear between the patient, fail to ensure patient's safety. Therefore, the pressure detection device is further provided with a reflective sensor 38 for detecting whether the pressure protection cover 2 is mounted. When the pressure protection cap 2 is mounted to the line pressure port 4 of the blood purification system, the housing 21 of the pressure protection cap 2 blocks the signal emitted by the reflective sensor 38 and reflects the signal back to the reflective sensor 38, and the reflective sensor 38 detects that the signal returns, that is, the electronic control unit indicates that the pressure protection cap 2 is mounted. If the protective cover 2 is not installed, the signal emitted by the reflective sensor 38 will not be blocked by an object, so that the signal cannot be reflected back to the reflective sensor 38, and the reflective sensor 38 cannot detect the signal, i.e. an alarm signal is output through the electronic control unit. It can be seen that whether the pressure protection cover 2 is installed or not can be identified in the blood purification treatment preparation stage, the detection is accurate, the treatment of patients can be smoothly carried out, the cross infection among the patients is avoided, and the safety of the patients is guaranteed.
Referring to fig. 3, the electronic control unit of the present embodiment includes a circuit board 39, and the pressure sensor 34 and the tact switch 35 are respectively disposed on the circuit board 39. The pressure detection means further comprises a holder 310, the holder 310 being mountable on an inner wall of the housing 11 of the medical device 1, the circuit board 39 being mounted on the holder 310. The circuit board 39 is used for monitoring signals fed back by the touch switch 35, the pressure sensor 34, the liquid sensor 32 and the reflective sensor 38 and providing control signals for the electromagnetic valve 33, the signals are processed by a Microprocessor (MCU) of the circuit board 39 and then communicated with a main processor (CPU) of the medical device 1 through a communication interface, state information and pressure detection information of the pressure protection cover 2 are transmitted to the main processor, and the main processor controls other parts of the medical device 1 to execute corresponding operations, such as stopping pump operation, clamping and closing a blood loop and the like, so as to ensure the safety of a patient.
The above embodiments are merely preferred examples of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications made based on the structure, characteristics and principles of the invention as claimed should be included in the claims of the present invention.
Claims (10)
1. A pressure detection device for a blood purification system, comprising an electronic control unit and a pressure sensor, wherein the pressure sensor is electrically connected with the electronic control unit, and the pressure detection device is characterized in that:
the pressure detection device also comprises a pipeline channel, a liquid sensor and an electromagnetic valve, wherein the liquid sensor and the electromagnetic valve are respectively and electrically connected with the electric control unit;
the pipeline channel is provided with a low section, the low section is located below a first end and a second end of the pipeline channel in the vertical direction, the first end of the pipeline channel is communicated with a pipeline of the blood purification system, and the second end of the pipeline channel is located on the pressure sensor;
the liquid sensor is arranged on the low section, and the electromagnetic valve is arranged on the pipeline channel and positioned between the low section and the second end of the pipeline channel;
wherein the pressure sensor is located above the liquid sensor in a vertical direction.
2. The pressure detection apparatus according to claim 1, characterized in that:
the pressure detection device also comprises a top rod, an elastic piece and a touch switch, wherein the touch switch is electrically connected with the electric control unit, and the top rod can move along the axial direction of the top rod;
the first end of the ejector rod can be pressed against the touch switch, and the elastic piece forces the ejector rod to be far away from the touch switch;
the pressure protection cover of the blood purification system can be pressed on the second end of the ejector rod.
3. The pressure detection apparatus according to claim 2, characterized in that:
the elastic piece is a tension spring, the tension spring is sleeved on the ejector rod, one end of the tension spring is connected with the first end of the ejector rod, and the tension spring forces the ejector rod to be far away from the touch switch.
4. The pressure detection apparatus according to claim 3, characterized in that:
the touch switch is a self-reset switch.
5. The pressure detection apparatus according to claim 1, characterized in that:
the liquid sensor is one of an infrared sensor or an ultrasonic sensor.
6. The pressure detection apparatus according to claim 2, characterized in that:
the electric control unit comprises a circuit board, and the pressure sensor and the touch switch are respectively arranged on the circuit board.
7. The pressure detection apparatus according to claim 6, characterized in that:
the pressure detection device further comprises a fixing frame, the fixing frame is used for being installed on medical equipment, and the circuit board is installed on the fixing frame.
8. The pressure detection device according to any one of claims 1 to 7, characterized in that:
the pressure detection device further comprises a reflection type sensor, and the reflection type sensor is electrically connected with the electronic control unit.
9. The pressure detection apparatus according to claim 8, characterized in that:
the reflective sensor is an infrared sensor.
10. Medical equipment, including pressure detection device, its characterized in that:
the pressure detection device according to any one of claims 1 to 9.
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| JP6100865B1 (en) * | 2015-10-29 | 2017-03-22 | 日機装株式会社 | Blood purification equipment |
| CN108714259A (en) * | 2018-06-07 | 2018-10-30 | 长沙曙光医疗科技有限公司 | A kind of medical treatment internal medicine lung ventilator and its application method |
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| CN103830781A (en) * | 2012-11-27 | 2014-06-04 | 深圳先进技术研究院 | Multifunctional blood purification therapeutic equipment and control method thereof |
| CN105561409A (en) * | 2015-12-16 | 2016-05-11 | 天津榕丰科技有限公司 | Automatic urine catheterization device for pressure measurement |
| CN106289630A (en) * | 2016-09-30 | 2017-01-04 | 四川南格尔生物科技有限公司 | A kind of loine pressure harvester and acquisition method |
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