Portable medical high-precision fluid meter

Abstract

The invention discloses a portable medical high-precision fluid meter which comprises a fluid storage device and a data processing device, the fluid storage device is provided with an inlet and an outlet, and a flow sensor and a color sensor are arranged at the inlet of the fluid storage device; the data processing device is provided with a display module, a power switch module, a microcomputer control module, a power module, a data signal transceiving module and an early warning module, the power module is electrically connected with the other modules, and the flow sensor and the color sensor are wirelessly connected to the data processing device through the data signal transceiving module. According to the fluid meter, statistics of the fluid flow is more accurate, the postoperative infection risk of a patient is reduced, the working efficiency of medical staff and family members and the doctor-patient satisfaction degree are improved, clinical safety is improved, the risk is reduced, the safety of the patient is guaranteed, economic benefits are improved, and the medical cost is reduced.

Description

Technical Field

[0001] The invention relates to a portable medical high-precision fluid meter, belonging to the technical field of precision medical equipment. Background Art

[0002] The surgical system is an important part of every hospital, such as neurosurgery, cardiothoracic surgery, gastrointestinal surgery, hepatobiliary and pancreatic surgery, urology, orthopedics, and obstetrics and gynecology. Most surgical diseases belong to the four major surgeries. After surgery, a variety of drainage devices will be left in place to facilitate adequate drainage and observation of the condition. The accurate measurement, flow rate, and color observation of the drainage fluid play a key role in the medical staff's judgment of the patient's condition. For example, radical pancreaticoduodenectomy is a high-risk and difficult surgical operation. Postoperative abdominal bleeding is the most serious and dangerous complication, with a mortality rate of more than 50%. Postoperative drainage fluid continues to be bloody fluid, greater than ≥50mL per hour within 24h, or drainage fluid ≥200mL for 2h and ≥400mL for 12h, all of which indicate active bleeding in the abdominal cavity; renal transplant patients often experience polyuria within 48h or even 72h after surgery, and the daily urine volume can reach thousands or even tens of thousands of milliliters. Clinical medical staff perform scientific fluid replacement based on the principle of "measure out as much as in" to maintain water balance in the body. After kidney transplantation, the 24-hour urine volume should be accurately recorded to determine the state of renal function recovery after kidney transplantation. Excessive urine volume will lead to the loss of water and electrolytes in the body, while too little urine volume will cause cross-renal function. In summary, the accurate measurement of drainage fluid and the outflow rate of fluid in clinical practice are of great significance for the observation of the condition.

[0003] However, the following problems are common in clinical statistics and observations of drainage fluid:

[0004] 1. In order to observe the patient's condition in a timely and effective manner, nurses need to regularly patrol the ward to check the drainage fluid every day, and frequently go back and forth between the ward and the nurse station. Currently, there is a lack of alarm devices that can automatically monitor the flow rate in the clinic, which can promptly remind medical staff of abnormal drainage fluid.

[0005] 2. The anti-reflux or disposable drainage device used clinically is a soft cystic device. Although the drainage bag has a scale on its exterior, the actual liquid capacity is very different from the reading on the surface of the drainage bag. In order to ensure the readiness of the liquid, nurses must use a high-precision measuring cylinder for measurement, which is time-consuming and labor-intensive and increases the risk of infection from contact with the liquid.

[0006] 3. Abnormal drainage fluid color is of great clinical significance, because changes in drainage fluid color may reflect changes in the patient's pathological state. If the drainage fluid is bright red after surgery, this usually indicates active bleeding at the surgical site. If the drainage fluid is yellow-green or has obvious purulent properties, this may be a sign of infection. If the drainage fluid is milky white, it may contain chylomicrons, which is normal after certain surgeries (such as thyroidectomy). However, observation of the color of the drainage fluid still depends on clinical nurses frequently going deep into the ward. Due to limited human resources and busy clinical work, observations may not be very timely sometimes, which is not conducive to patient safety.

[0007] 4. In response to the problem of drainage fluid measurement in clinical practice, some researchers have also improved some drainage measurement devices. For example, Li Lanyu et al. made a new type of drainage fluid measuring cylinder, just to solve the problem of measurement accuracy; Xi Yongxia et al. designed an electronic urine meter. Although it uses a turbine sensor to rotate under the action of the fluid to read the urine volume, it is an improvement over previous tools, but its function is relatively simple. Shi Jianquan et al. invented and disclosed an intelligent metering drainage bag, which uses a weighing sensor to replace manual readings, and uses a fixed time to continuously weigh in batches to obtain the displacement data of different time periods. However, in actual clinical work, we only need to measure the volume of liquid in most cases. Different liquids have different densities. How to convert the concentration of drainage fluid into volume is also a factor that needs to be considered. Summary of the invention

[0008] In order to solve the above problems, accurately measure the drainage volume, reduce the workload of nurses, and monitor the flow rate of drainage fluid in real time, the present invention designs a portable medical high-precision fluid meter, which integrates drainage, quantitative and monitoring functions to avoid the harm of excessive drainage to patients. The specific technical scheme is as follows, including: a fluid storage device and a data processing device,

[0009] The fluid storage device is provided with an inlet and an outlet, and a flow sensor and a color sensor are provided at the inlet.

[0010] The data processing device is provided with a display module, a power switch module, a microcomputer control module, a power module, a data signal transceiver module and an early warning module. The power module is electrically connected to the other modules.

[0011] The flow sensor and the color sensor are wirelessly connected to the data processing device via a data signal transceiver module.

[0012] Furthermore, the flow sensor is a turbine flow sensor.

[0013] Furthermore, the color sensor is an integrated light-frequency converter.

[0014] Furthermore, the flow sensor, the color sensor and the data signal transceiver module are all provided with Bluetooth, and the wireless connection is a Bluetooth connection.

[0015] Furthermore, the Bluetooth connection is specifically a Bluetooth Mesh networking connection based on Bluetooth 4.0.

[0016] Furthermore, the display module is a liquid crystal display screen, and the power module is a battery and / or an external power supply.

[0017] Furthermore, the fluid storage device is a disposable sterile sealed plastic bag provided with an inlet and an outlet.

[0018] Beneficial effects:

[0019] 1. The statistics of liquid flow are more accurate. The fluid meter of the present invention can accurately record the liquid volume for 24 hours with high accuracy;

[0020] 2. Reduce the risk of postoperative infection for patients. By avoiding the need to pour the liquid into the measuring cup for counting multiple times, the risk of infection caused by environmental pollution is reduced;

[0021] 3. Improve the work efficiency of medical staff and their families. The fluid meter of the present invention not only calculates accurately, but also automatically counts the total amount, avoiding the frequent registration of nurses and their families, greatly saving the working time of nurses, and improving work efficiency and doctor-patient satisfaction;

[0022] 4. Improved clinical safety. The monitoring of the color and flow of drainage fluid can generate an intelligent monitoring alarm system in time, which will be reported to the nurse workstation to remind medical staff to deal with it as soon as possible, reduce risks and ensure patient safety.

[0023] 5. Improved economic benefits, the Bluetooth data signal transceiver module can be used repeatedly, reducing medical expenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a fluid storage device of the present invention,

[0025] Figure 2 is a schematic diagram of the structure of a data processing device of the present invention,

[0026] Figure numerals: 1-inlet, 2-outlet, 3-flow sensor, 4-color sensor, 5-display module, 6-power switch module, 7-microcomputer control module, 8-power module, 9-data signal transceiver module, 10-early warning module. DETAILED DESCRIPTION

[0027] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0028] like Figure 1 and Figure 2 As shown, the present invention is a portable medical high-precision fluid meter, comprising: a fluid storage device and a data processing device, wherein the fluid storage device is provided with an inlet 1 and an outlet 2, wherein a flow sensor 3 and a color sensor 4 are provided at the inlet 1, and the data processing device is provided with a display module 5, a power switch module 6, a microcomputer control module 7, a power module 8, a data signal transceiver module 9 and an early warning module 10, wherein the power module 8 is electrically connected to the remaining modules, and the flow sensor 3 and the color sensor 4 are wirelessly connected to the data processing device via the data signal transceiver module 9.

[0029] like Figure 2 As shown, the power switch module 6, i.e., the start button, plays the function of opening and closing, and records the total amount of liquid flowing through the inlet 1 from the beginning to the closing. The display module 5, i.e., the display screen, each time the liquid flows through the flow sensor 3, the display screen will show an accumulated total amount of liquid, which directly reflects the patient's liquid data and facilitates clinical medical care to interpret the condition. The power module 8 can be repeatedly charged to achieve multiple cycles, energy saving and environmental protection, and cost reduction. The microcomputer control module 7, i.e., the control board, collects sensor data, and after processing, displays it through the display module 5, i.e., the display screen.

[0030] The flow sensor 3 is a turbine flow sensor. The working principle of the turbine flow sensor is based on fluid dynamics and electromagnetic induction principles. When the fluid flows through the cavity of the turbine flow sensor, the power of the fluid drives the turbine blades to rotate. The rotation speed of the turbine blades is proportional to the volume flow rate of the fluid. The turbine flow sensor contains a signal detector composed of permanent magnets and coils. When the turbine blades rotate in the magnetic field, the blades cut the magnetic lines of force and periodically change the magnetic flux of the coil, thereby generating an electrical pulse signal. These signals are processed by amplifiers and shaping circuits to form continuous rectangular pulse waves with a certain amplitude. Finally, the instantaneous flow rate and cumulative total amount of the fluid can be calculated based on the number and frequency of pulses. According to the calculation principle of the turbine flow sensor, the flow rate of the fluid is inversely proportional to the period of the pulse and inversely proportional to the volume corresponding to a single pulse. The calculation formula is:

[0031] V=K / t, (V is the flow rate of the fluid, t is the number of pulses, and K is the volume flowing through corresponding to a single pulse of the sensor).

[0032] The color sensor 4 is an integrated light-frequency converter. The color sensor 4 is integrated in the inlet 1. When the liquid flows through the color sensor 4 on the inlet 1, the color range of the liquid is detected in real time by the color sensor 4, and the detection result is compared with the safe numerical range preset by the microcomputer control module 7. If the safe numerical range is exceeded, the early warning module 10 is triggered to issue an alarm, thereby achieving the function of detection and alarm. The color sensor 4 is also a color recognition sensor or a color sensor. It takes the color of the object as the collection object, and converts it into a digital signal output detection result through photoelectric conversion. There are mainly the following types: discrete photodiodes with color filters, integrated light-voltage converters, and integrated light-frequency converters. According to the use requirements of this case for fast response and small size, an integrated light-frequency converter is selected. The photodiodes of each color are connected in parallel to finally balance any uneven illumination. This solution eliminates the transimpedance amplifier and A / D converter, and only requires a simple measurement cycle or calculation of the number of pulses from the sensor in one cycle.

[0033] The flow sensor 3, the color sensor 4 and the data signal transceiver module 9 are all provided with Bluetooth, and the wireless connection is a Bluetooth connection.

[0034] The Bluetooth connection is specifically a Bluetooth Mesh networking connection based on Bluetooth 4.0. Bluetooth Mesh networking is a wireless network networking technology based on Bluetooth 4.0 that allows many-to-many communication through BLE to create a mesh network of Bluetooth devices. The Bluetooth Mesh network is mainly composed of node devices, controller devices and network devices, which can form a network of various Bluetooth devices to form an adaptive local area network to achieve control and management of smart devices. The characteristics of Bluetooth Mesh networking include support for low power consumption, high efficiency, fault tolerance and large-scale network coverage. It is suitable for fields such as smart homes, industrial Internet and hospital buildings, and achieves seamless connection and information interaction between devices by coordinating communications between nodes. The advantages of Bluetooth Mesh networking are reduced energy consumption and operating costs, support fault tolerance, achieve large-scale network coverage and meet various network requirements. It has been through technological progress, and its scope of application will continue to expand, enabling more people to achieve control and management of smart devices.

[0035] Bluetooth communication is low-power, and each fluid meter can be connected to a Bluetooth gateway, which is a device that can connect Bluetooth devices to the Internet or a larger network. It acts as a bridge between Bluetooth devices and external networks, allowing Bluetooth devices to communicate with remote servers or cloud platforms. The Bluetooth gateway can receive signals from fluid meters and convert these signals into network data, which is sent to the server or cloud platform via the Internet. In this way, the service center console can remotely control each fluid meter connected to the gateway. The Bluetooth gateway can manage multiple fluid meters, including equipment status monitoring, fault alarms, firmware updates, etc. In addition, the Bluetooth gateway also provides encrypted communication to ensure the security of data transmission.

[0036] The display module 5 is a liquid crystal display screen, and the power module 8 is a battery and / or an external power supply.

[0037] The fluid storage device is a disposable sterile sealed plastic bag provided with an inlet 1 and an outlet 2 .

[0038] Usage method: After connecting the inlet 1 of the fluid storage device to the drainage tube, press the power switch module 6 to start it. The microcomputer control module 7 clears the flow sensor 3 and the color sensor 4 according to the start signal, and counts and accumulates the number of pulses emitted by the flow sensor 3 through the data signal transceiver module 9. According to the volume calculation formula of the turbine flow sensor, the microcomputer control module 7 calculates the total flow and displays the flow value on the display module 5, i.e., the liquid crystal display screen. The signal emitted by the color sensor 4 is also processed through the data signal transceiver module 9. At the same time, the received flow and color data results are compared with the safety value range pre-set by the microcomputer control module 7. If the safety value range is exceeded, the early warning module 10 is triggered to issue an alarm behavior, which is convenient for clinical medical staff to interpret the condition.

[0039] Jiangsu Rongye disposable drainage bags (hereinafter referred to as Jiangsu Rongye) and Weikang Medical anti-reflux drainage bags (hereinafter referred to as Weikang Medical) were purchased from the market. The two drainage bags were used for experiments at the same time to measure different standard volumes of tap water. First, a medical staff member injected different standard volumes of tap water into the drainage bag in batches, and visually read the volume data of the tap water in the bag. Then, the same person emptied the tap water in the bag and directly read the data displayed on the flow meter on the drainage bag. The visual data and the data displayed on the flow meter were compared with the standard volume data, and the t value and P value were obtained through the data analysis software, as shown in Table 1.

[0040] Table 1 Error analysis of the visual volume of tap water in drainage bags of two brands and the volume displayed by the flow meter

[0041]

[0042] It can be seen from the data in Table 1 above that: in most cases, the P value is less than 0.05, indicating that there is a significant difference between the volume data error counted by the flow meter and the volume data error read visually, that is, the portable medical high-precision fluid meter of the present invention measures liquid volume more accurately than visual estimation, which not only improves the accuracy of medical data, but also reduces the workload and technical requirements of medical staff.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable medical high-precision fluid meter, characterized in that: include: Fluid storage device and data processing device, The fluid storage device is provided with an inlet (1) and an outlet (2), wherein a flow sensor (3) and a color sensor (4) are provided at the inlet (1). The data processing device is provided with a display module (5), a power switch module (6), a microcomputer control module (7), a power module (8), a data signal transceiver module (9) and an early warning module (10), wherein the power module (8) is electrically connected to the remaining modules. The flow sensor (3) and the color sensor (4) are wirelessly connected to the data processing device via a data signal transceiver module (9).

2. A portable medical high-precision fluid meter according to claim 1, characterized in that: The flow sensor (3) is a turbine flow sensor.

3. A portable medical high-precision fluid meter according to claim 1, characterized in that: The color sensor (4) is an integrated light-frequency converter.

4. A portable medical high-precision fluid meter according to claim 1, characterized in that: The flow sensor (3), the color sensor (4) and the data signal transceiver module (9) are all provided with Bluetooth, and the wireless connection is a Bluetooth connection.

5. A portable medical high-precision fluid meter according to claim 1, characterized in that: The Bluetooth connection is specifically a Bluetooth Mesh networking connection based on Bluetooth 4.

0.

6. A portable medical high-precision fluid meter according to claim 1, characterized in that: The display module (5) is a liquid crystal display screen, and the power module (8) is a battery and / or an external power source.

7. A portable medical high-precision fluid meter according to claim 1, characterized in that: The fluid storage device is a disposable sterile sealed plastic bag provided with an inlet (1) and an outlet (2).

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