Nurse hand washing reminding system combining UWB ultra wide band positioning and PDA

Abstract

The invention relates to a nurse hand washing reminding system combining UWB (Ultra Wideband) positioning and a PDA (Personal Digital Assistant). The nurse hand washing reminding system is a hand washing reminding system combining UWB positioning and the nurse PDA. According to the system, the UWB technology is used for tracking the position of medical staff in real time, reminding information is received through nurse PDA equipment, a time threshold value and the hand washing state are combined, multiple key scenes such as frequent reminding and coverage of wards and treatment cars are avoided, and comprehensiveness and effectiveness of reminding are ensured. The system also records reminding data to provide support for hand hygiene compliance analysis and management decision.

Description

Technical Field

[0001] The present disclosure relates to the technical field of health management, and particularly to a nurse handwashing reminder system combining UWB ultra-wideband positioning and PDA. Background Art

[0002] Hand hygiene is the general term for handwashing, hygienic hand disinfection, and surgical hand disinfection. The whole hospital must be equipped with qualified handwashing and hygienic hand disinfection facilities. Each department should be equipped with running water and hand sanitizer. Non-touch faucet switches should be installed in key departments such as operating rooms, catheterization laboratories, intensive care units, delivery rooms, neonatal wards, hemodialysis rooms, infectious disease departments, stomatology departments, and disinfection supply centers. At the same time, qualified quick-drying hand disinfectants, dry hand items or facilities such as disposable dry hand towels, hand dryers, etc. should be equipped, and secondary contamination should be avoided.

[0003] Hand hygiene management has the following indications and implementation methods:

[0004] 1. Handwashing indications: Medical staff should wash their hands under the following circumstances

[0005] Before contacting patients, including when moving from a contaminated part to a clean part of the same patient's body; before aseptic operations; after contacting patients; after contacting patient body fluids; after contacting the patient's environment; before and after putting on and taking off isolation gowns, after removing gloves; before handling medications or preparing meals, etc.

[0006] 2. Hand disinfection indications: Medical staff should perform hand disinfection under the following circumstances

[0007] Before examining, treating, and nursing immunocompromised patients; before and after entering and leaving key departments such as ICUs and isolation wards; after contacting infectious body fluids and their environment and items; when hands need to maintain antibacterial activity for a long time.

[0008] 3. Surgical hand disinfection: During surgical hand disinfection, hands should be washed first and then disinfected. Between surgeries on different patients, when gloves are damaged or hands are contaminated, surgical hand disinfection should be performed again.

[0009] 4. Handwashing and disinfection methods: Medical staff should follow the handwashing and hand disinfection methods, steps, and time requirements in the "Hand Hygiene Specification for Medical Staff" to ensure the handwashing and disinfection effects.

[0010] However, the management methods of traditional hand hygiene mainly rely on manual supervision or the use of fixed equipment for supervision. However, this fixed supervision method still has the following management defects:

[0011] First, the Infection Management Department monitors the disinfection effect of the hands of medical staff working in key departments every month. When it is suspected that a hospital infection outbreak is related to the hand hygiene of medical staff, timely monitoring should be carried out, and corresponding pathogenic microorganism monitoring should also be carried out. This requires medical staff to frequently enter and exit wards or treatment areas. At this time, the system may trigger too many ineffective reminders, leading to reminder fatigue.

[0012] Secondly, traditional hand hygiene management methods cannot track the location and behavior of medical staff in real time, making it difficult to provide handwashing reminders in a timely manner. Moreover, most electronic reminder systems are based on fixed devices (such as hand sanitizer dispensers) and cannot cover all key scenarios.

[0013] Finally, traditional methods lack data support and management optimization, making it difficult to collect and analyze hand hygiene compliance data and unable to provide support for management decisions.

[0014] Therefore, hospital hand hygiene management faces challenges such as inability to monitor in real time, single reminder method, interference from frequent reminders, and lack of data support. Summary of the Invention

[0015] To solve the above problems, this application proposes a nurse handwashing reminder system that combines UWB ultra-wideband positioning and PDA.

[0016] On the one hand, this application proposes a nurse handwashing reminder system that combines UWB ultra-wideband positioning and PDA, including:

[0017] A UWB ultra-wideband positioning module for reporting the EWB positioning signals of medical staff to the server at a preset frequency;

[0018] A server for receiving the EWB positioning signals and calculating whether the medical staff has reached a preset handwashing area:

[0019] If so, generate corresponding handwashing reminder information and push it to the PDA held by the medical staff;

[0020] Otherwise, continue to monitor;

[0021] A PDA for receiving and responding to the handwashing reminder information;

[0022] The UWB ultra-wideband positioning module and the PDA are respectively communicatively connected to the server.

[0023] Preferably, the UWB ultra-wideband positioning module includes:

[0024] A UWB tag worn on the medical staff for sending the EWB positioning signals of the medical staff to the UWB base station;

[0025] A UWB base station, deployed in the handwashing area, is used to inductively receive the EWB positioning signal, calculate the corresponding position information according to the EWB positioning signal, and report it to the server in real time;

[0026] The UWB tag and the UWB base station are connected for mutual inductance communication using near-field communication technology.

[0027] Preferably, the UWB base station is deployed in the handwashing area where the ward or treatment cart is located.

[0028] Preferably, the PDA and the server communicate with each other using the MQTT protocol.

[0029] Preferably, the server is further used for:

[0030] Register the identification ID of the medical staff;

[0031] Bind the UWB ultra-wideband positioning module and the PDA to the identification ID of the corresponding medical staff.

[0032] Preferably, the way for the server to calculate whether the medical staff has reached the preset handwashing area is:

[0033]

[0034] Wherein:

[0035] P x , P y is the coordinate of the current position of the medical staff (obtained in real time through the EWB positioning signal);

[0036] C x , C y is the central coordinate of the preset handwashing area (pre-defined by the system);

[0037] R is the radius of the handwashing area;

[0038] When the handwashing key value is 1, it is determined that the medical staff is within the handwashing area;

[0039] When the handwashing key value is 0, it is determined that the medical staff has not entered.

[0040] On the other hand, this application proposes a nurse handwashing reminder method combining UWB ultra-wideband positioning and PDA, including the following steps:

[0041] Activate the UWB tag and regularly send the EWB positioning signal of the medical staff to the UWB base station;

[0042] The UWB base station inductively receives the EWB positioning signal, calculates the corresponding position information according to the EWB positioning signal, and reports it to the server in real time;

[0043] The server receives the EWB positioning signal and calculates whether the medical staff has reached the preset handwashing area:

[0044] If so, it generates the corresponding handwashing reminder information and pushes it to the PDA held by the medical staff;

[0045] Otherwise, it continues to monitor;

[0046] A PDA, which is used to receive and respond to the handwashing reminder information.

[0047] On the other hand, this application also proposes an electronic device, including:

[0048] A processor;

[0049] A memory for storing instructions executable by the processor;

[0050] Wherein, when the processor is configured to execute the executable instructions, it implements the method for reminding nurses of handwashing by combining UWB ultra-wideband positioning and PDA as described above.

[0051] The technical effects of the present invention:

[0052] This application proposes a handwashing reminder system based on the combination of UWB ultra-wideband positioning and nurses' PDAs. This system uses UWB technology to track the positions of medical staff in real time, receives reminder information through nurses' PDA devices, and combines time thresholds and handwashing status to avoid frequent reminders, covering multiple key scenarios such as wards and treatment carts, ensuring the comprehensiveness and effectiveness of reminders. The system also records reminder data to provide support for hand hygiene compliance analysis and management decision-making.

[0053] The present invention can solve the following technical problems:

[0054] 1. Insufficient real-time monitoring and reminder:

[0055] Traditional hand hygiene management methods cannot track the positions and behaviors of medical staff in real time, and it is difficult to provide handwashing reminders in a timely manner.

[0056] This solution uses UWB ultra-wideband positioning technology to monitor the positions of medical staff in real time, ensuring that handwashing reminders are triggered in key scenarios (such as entering the ward and approaching the treatment cart).

[0057] 2. Single reminder method and incomplete coverage:

[0058] Existing electronic reminder systems are mostly based on fixed devices (such as hand sanitizer dispensers) and cannot cover all key scenarios.

[0059] This solution combines nurses' PDA devices to achieve multi-scenario coverage (such as wards and treatment carts), ensuring the comprehensiveness and effectiveness of reminders.

[0060] 3. Frequent reminders lead to reminder fatigue:

[0061] When medical staff frequently enter and leave the ward or treatment area, the system may trigger too many ineffective reminders, resulting in reminder fatigue.

[0062] This solution avoids frequent reminders through time thresholds and handwashing status records, improving the accuracy of reminders and the user experience.

[0063] 4. Lack of data support and management optimization:

[0064] Traditional methods are difficult to collect and analyze hand hygiene compliance data and cannot provide support for management decisions.

[0065] This solution provides data support for hand hygiene compliance analysis and management optimization by recording reminder data.

[0066] Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The accompanying drawings, which are included in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0068] Figure 1 It is shown as the system working timing diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0069] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0070] The term "exemplary" used herein means "serving as an example, embodiment, or illustration". Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments.

[0071] In addition, for a better description of the present disclosure, numerous specific details are given in the following detailed description. Those skilled in the art should understand that the present disclosure can be implemented without some of these specific details. In some instances, well-known means, elements, and circuits have not been described in detail so as to highlight the gist of the present disclosure.

[0072] Example 1

[0073] As Figure 1As shown in the figure, on the one hand, the present application proposes a nurse handwashing reminder system combining UWB ultra-wideband positioning and PDA, including:

[0074] A UWB ultra-wideband positioning module, configured to report the EWB positioning signal of medical staff to the server at a preset frequency; the UWB ultra-wideband positioning module includes: a UWB tag, worn on the medical staff, for sending the EWB positioning signal of the medical staff to the UWB base station; a UWB base station, deployed in the handwashing area, for sensing and receiving the EWB positioning signal, calculating the corresponding position information according to the EWB positioning signal and reporting the server in real time; the UWB tag and the UWB base station are connected by mutual inductance communication using near-field communication technology;

[0075] A server, configured to receive the EWB positioning signal and calculate whether the medical staff reaches the preset handwashing area:

[0076] If so, generate a corresponding handwashing reminder message and push it to the PDA held by the medical staff;

[0077] Otherwise, continue to monitor;

[0078] A PDA, configured to receive and respond to the handwashing reminder message;

[0079] The UWB ultra-wideband positioning module and the PDA are respectively communicatively connected to the server.

[0080] System composition:

[0081] 1. UWB base station:

[0082] Deployed in the ward and the treatment cart, for receiving UWB tag signals and calculating positions.

[0083] The base station in the treatment cart is battery-powered and has a lightweight design for easy movement.

[0084] 2. UWB tag:

[0085] Embedded in the nurse's work card, sending UWB signals in real time for positioning the nurse's position.

[0086] 3. Nurse PDA device:

[0087] Each nurse is equipped with a PDA device installed with a handwashing reminder application.

[0088] Used to receive the handwashing reminder sent by the server and remind the nurse through sound, vibration or screen notification.

[0089] 4. Server:

[0090] Use the MQTT protocol for message pushing and receive the location information sent by the UWB base station.

[0091] Judge whether a handwashing reminder needs to be sent according to preset rules (such as a nurse entering a ward or approaching a treatment cart).

[0092] Preferably, the UWB base station is deployed in the handwashing area where the ward or the treatment cart is located.

[0093] Preferably, the MQTT protocol is used for communication between the PDA and the server.

[0094] UWB positioning module: Deployed in the work ID or bracelet of medical staff to collect high-precision location data in real time.

[0095] Server: Deployed locally in the hospital or in the cloud, responsible for receiving data, calculating locations, and generating reminder logic.

[0096] PDA (handheld terminal / nursing terminal): Carried by medical staff and supports MQTT protocol communication.

[0097] In terms of configuration:

[0098] The UWB positioning module realizes

[0099] Positioning signal acquisition:

[0100] Use a UWB chip (such as Decawave DW1000 or Qorvo DWM3000) to achieve centimeter-level positioning.

[0101] Calculate real-time coordinates through the TOF (Time of Flight) or TDOA (Time Difference of Arrival) algorithm.

[0102] Data reporting:

[0103] Package the coordinates (P_x, P_y) into JSON format and report them to the server via WiFi or Bluetooth at a preset frequency (such as once per second).

[0104] Supports the IEEE802.15.4a protocol and has strong anti-multipath interference ability.

[0105] Communication between the server and the base station

[0106] Receive the coordinate data reported by the UWB module through the REST API or WebSocket.

[0107] Parse the JSON data and extract the device_id and (P_x, P_y) (please understand specifically in combination with the following formulas).

[0108] Area determination algorithm:

[0109] Read the preset handwashing area parameters (C_x, C_y, R) from the database.

[0110] Calculate whether to enter the area according to the formula:

[0111] The way the server calculates whether the medical staff reaches the preset handwashing area is:

[0112]

[0113] Where:

[0114] P x , P y is the coordinate of the current position of the medical staff (obtained in real time through the EWB positioning signal);

[0115] C x , C y is the central coordinate of the preset handwashing area (pre - defined by the system);

[0116] R is the radius of the handwashing area;

[0117] When the handwashing key value is 1, it is determined that the medical staff is within the handwashing area;

[0118] When the handwashing key value is 0, it is determined that the staff has not entered.

[0119] Reminder logic and push:

[0120] Condition trigger:

[0121] If the key value = 1, generate a reminder message and record the event timestamp.

[0122] If entering continuously for multiple times (to avoid false triggering), an anti - shake mechanism can be set (for example, only remind once within 5 minutes).

[0123] MQTT push:

[0124] By combining {medical staff PDA device_id} and the alarm information, generate a reminder message and push a JSON message to the PDA:

[0125] {

[0126] "type":"handwash_alert",

[0127] "message":"Please wash your hands immediately!",

[0128] "timestamp":1633027200,

[0129] "area_id":"WASH_ZONE_01"

[0130] }.

[0131] PDA terminal response

[0132] Subscribe to the MQTT topic:

[0133] When the PDA starts up, subscribe to the above reminder messages.

[0134] Reminder trigger:

[0135] After receiving the message, trigger vibration, buzzer sound, and screen pop-up window (priority: vibration > sound > pop-up window).

[0136] User feedback:

[0137] After the medical staff washes their hands and clicks "Confirm", the PDA sends feedback to the server (optional, for compliance statistics).

[0138] The server counts the handwashing confirmation information fed back by each medical staff through the PDA and generates a report, and the background administrator can check and judge the handwashing situation of each medical staff in a timely manner.

[0139] Implementation time:

[0140] Install a UWB positioning base station (Anchor) in the handwashing area to ensure signal coverage.

[0141] Distribute work badges integrated with UWB modules to medical staff.

[0142] System configuration:

[0143] Pre-define the handwashing area coordinates (C_x, C_y) and radius R on the server.

[0144] Configure the TLS encryption and client authentication of the MQTT Broker (to prevent data leakage).

[0145] Workflow:

[0146] 1. Location tracking:

[0147] The UWB tag periodically sends UWB signals, and the UWB base station receives the signals and calculates the position of the tag.

[0148] The base station sends the location information to the server through the wireless network.

[0149] 2. Reminder trigger:

[0150] Based on the received location information, the server determines whether the nurse has entered the critical area that requires handwashing (such as near the ward or treatment cart).

[0151] If it is determined that a reminder is needed, the server pushes the reminder information to the nurse's PDA device via the MQTT protocol.

[0152] 3. Reminder display:

[0153] After the PDA device receives the reminder information, it notifies the nurse to wash hands through sound, vibration, or screen notification.

[0154] 4. Time threshold optimization:

[0155] The system sets a time threshold (such as 30 minutes), and only triggers one reminder within the threshold to avoid frequent reminders. If the nurse enters the same area multiple times within the threshold, the system will not trigger the reminder repeatedly.

[0156] Preferably, the server is further configured to:

[0157] Register the identification ID of the medical staff;

[0158] Bind the UWB ultra-wideband positioning module and the PDA to the corresponding identification ID of the medical staff.

[0159] The background can record the device ID of each medical staff's handheld PDA and the encoding / number of the label on the work card, etc., and bind them to their identity ID, etc., for facilitating the recording of their handwashing data. The binding work is handled by the administrator.

[0160] The server receives EWB positioning signals, obtains the position coordinates of the medical staff at regular intervals, and then calculates in real time whether they enter the area. The formula can calculate in real time whether each position point is within the area. The process is as follows:

[0161] Data input:

[0162] The server receives EWB positioning signals in real time and parses out the coordinates (Px, Py) of the medical staff.

[0163] Read the parameters (Cx, Cy, R) of the preset handwashing area from the configuration. The handwashing facilities are configured in the ward or on the medical cart, and the specific parameters are recorded in the background server by the administrator in advance.

[0164] Distance calculation:

[0165] Calculate the square root of the Euclidean distance between the current coordinates and the center of the area and compare it with R;

[0166] Condition judgment:

[0167] If the calculation result (d) ≤ R, it is determined that the medical staff is located within the handwashing area (at this time, the system outputs a handwashing key value of 1);

[0168] Otherwise, it is determined that they have not entered (handwashing key value = 0).

[0169] Extended scenario

[0170] Polygon area:

[0171] If the handwashing area is an irregular polygon, the ray method or the vector cross - product method is required to determine whether a point is inside the polygon.

[0172] The formula complexity increases, and it is necessary to judge the number of intersection points or the sign change edge by edge.

[0173] Three - dimensional space:

[0174] If the floor height needs to be considered (such as the multi - floor structure of a hospital), introduce the z - axis coordinates (Pz, Cz) and expand the formula to:

[0175] d 2 =(Px - Cx) 2 +(Py - Cy) 2 +(Pz - Cz) 2 ≤R 2 .

[0176] This formula associates the positioning signal with the preset area through geometric relationships, providing a real - time judgment basis for hospital hand hygiene compliance monitoring.

[0177] Obviously, those skilled in the art should understand that to implement all or part of the processes in the above embodiments, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer - readable storage medium. When the program is executed, it can include the processes of the above - mentioned control embodiments. Those skilled in the art can understand that to implement all or part of the processes in the above embodiments, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer - readable storage medium. When the program is executed, it can include the processes of the above - mentioned control embodiments. Among them, the storage medium can be a magnetic disk, an optical disk, a Read - Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory, a Hard Disk Drive (abbreviation: HDD) or a Solid - State Drive (SSD), etc.; the storage medium can also include a combination of the above - mentioned types of memories.

[0178] Embodiment 2

[0179] Based on the implementation principle of Embodiment 1, on the other hand, this application proposes a nurse handwashing reminder method combining UWB ultra - wideband positioning and PDA, including the following steps:

[0180] Activate the UWB tag and regularly send the EWB positioning signal of medical staff to the UWB base station;

[0181] The UWB base station senses and receives the EWB positioning signal, calculates the corresponding position information according to the EWB positioning signal, and reports it to the server in real time;

[0182] The server receives the EWB positioning signal and calculates whether the medical staff has reached the preset handwashing area:

[0183] If so, generate the corresponding handwashing reminder information and push it to the PDA held by the medical staff;

[0184] Otherwise, continue to monitor;

[0185] The PDA is used to receive and respond to the handwashing reminder information.

[0186] The above method steps can be understood and implemented in combination with Embodiment 1, and will not be elaborated here.

[0187] Each module or step of the present invention described above can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present invention is not limited to any specific combination of hardware and software.

[0188] Embodiment 3

[0189] Furthermore, on the other hand of the present application, an electronic device is further proposed, including:

[0190] A processor;

[0191] A memory for storing instructions executable by the processor;

[0192] Wherein, when the processor is configured to execute the executable instructions, it implements the method for reminding nurses to wash hands by combining UWB ultra-wideband positioning and PDA described in Embodiment 2.

[0193] The electronic device in the embodiment of the present disclosure includes a processor and a memory for storing instructions executable by the processor. Wherein, when the processor is configured to execute the executable instructions, it implements the method for reminding nurses to wash hands by combining UWB ultra-wideband positioning and PDA described in the previous Embodiment 2.

[0194] Here, it should be noted that the number of processors can be one or more. At the same time, in the electronic device according to the embodiments of the present disclosure, an input device and an output device may also be included. Among them, the processor, the memory, the input device, and the output device may be connected through a bus or in other ways, which is not specifically limited here.

[0195] As a computer-readable storage medium, the memory can be used to store software programs, computer-executable programs, and various modules, such as: the programs or modules corresponding to a method for reminding nurses to wash hands by combining UWB ultra-wideband positioning and PDA according to the embodiments of the present disclosure. The processor executes various functional applications and data processing of the electronic device by running the software programs or modules stored in the memory.

[0196] The input device can be used to receive input numbers or signals. Among them, the signal can be a key signal related to the user settings and function control of the device / terminal / server. The output device may include a display device such as a display screen.

[0197] The above has described the embodiments of the present disclosure. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. A nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA, characterized in that: include: UWB ultra-wideband positioning module, used to report the medical staff's EWB positioning signal to the server at a preset frequency; The server is used to receive the EWB positioning signal and calculate whether the medical staff has reached the preset hand washing area: If yes, a corresponding hand-washing reminder message is generated and pushed to the PDA held by the medical staff; Otherwise, continue monitoring; A PDA, used to receive and respond to the hand washing reminder information; The UWB ultra-wideband positioning module and the PDA are respectively connected to the server for communication.

2. According to claim 1, a nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA is characterized in that: The UWB ultra-wideband positioning module includes: The UWB tag is worn by the medical staff and is used to send the EWB positioning signal of the medical staff to the UWB base station; A UWB base station is deployed in the hand washing area, and is used to sense and receive the EWB positioning signal, calculate the corresponding position information according to the EWB positioning signal, and report it to the server in real time; The UWB tag and the UWB base station are connected by mutual induction communication using near field communication technology.

3. The nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA according to claim 1 is characterized in that: The UWB base station is deployed in the hand washing area where the ward or treatment vehicle is located.

4. The nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA according to claim 1 is characterized in that: The PDA and the server communicate with each other using the MQTT protocol.

5. The nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA according to claim 1 is characterized in that: The server is also used for: Register the identification ID of the medical staff; The UWB ultra-wideband positioning module and the PDA are bound to the identification ID of the corresponding medical staff.

6. The nurse hand washing reminder system combining UWB ultra-wideband positioning and PDA according to claim 1 is characterized in that: The server calculates whether the medical staff has reached the preset hand washing area in the following manner: in: P x , P y The coordinates of the medical staff’s current location (obtained in real time through EWB positioning signals); C x , C y The center coordinates of the preset hand washing area (pre-defined by the system); R is the radius of the hand washing area; When the hand washing key value is 1, it is determined that the medical staff is in the hand washing area; When the hand washing key value is 0, it is determined that no entry has been made.

7. A nurse hand washing reminder method combining UWB ultra-wideband positioning and PDA, characterized in that: include: The steps include: Activate the UWB tag and regularly send the medical staff's EWB positioning signal to the UWB base station; The UWB base station senses and receives the EWB positioning signal, calculates the corresponding position information according to the EWB positioning signal and reports it to the server in real time; The server receives the EWB positioning signal and calculates whether the medical staff has reached the preset hand washing area: If yes, a corresponding hand-washing reminder message is generated and pushed to the PDA held by the medical staff; Otherwise, continue monitoring; The PDA is used to receive and respond to the hand washing reminder information.

8. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to implement the nurse hand washing reminder method combining UWB ultra-wideband positioning and PDA as described in claim 7 when executing the executable instructions.

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