Intelligent portable nurse night patrol mirror device

Abstract

The invention relates to an intelligent portable nurse night patrol mirror device which comprises a night patrol mirror body, the night patrol mirror body comprises a shell, an infrared camera, an infrared LED lamp, a display screen, a host module and a power module, the infrared camera and the infrared LED lamp are arranged on a front panel of the shell, and the host module and the power module are arranged in the shell. According to the intelligent portable nurse night patrol mirror device, the low-cost active near-infrared night vision technology is applied to a medical night patrol scene in a miniaturized, monocular display and modular wearing mode for the first time, the effect that the nurse does not disturb sleep of a patient at all during night room patrol work can be achieved, multiple wearing modes are provided, and the intelligent portable nurse night patrol mirror device is convenient to use. And the use requirements of different nurses can be met. By means of the night patrol mirror device, during night patrol, whether a patient has the risk of abnormal vital sign signals or not can be judged without turning on a lamp or assisting with other visible light sources or making contact with the patient, and the influence on sleep of the patient in a ward in the night patrol process can be avoided to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of medical device technology. In particular, it relates to an intelligent portable nurse night patrol device. Background Technology

[0002] In clinical practice, night rounds are an important task for nurses on night duty, providing care and nursing for hospitalized patients. The purpose is to promptly observe and detect any abnormalities in patients to prevent their condition from worsening or even leading to death. A key aspect of night rounds is checking whether patients (especially critically ill patients) have normal vital signs, i.e., whether they are alive.

[0003] Currently, in clinical practice, nurses commonly perform examinations by turning on the lights or using flashlights or other light sources. Turning on the lights severely disrupts patients' rest, and while flashlights provide relatively low light, they inevitably affect patients' sleep and make it inconvenient for nurses to perform other procedures. Patents CN220506602U disclose an auxiliary device for nurses' night rounds, and CN210424561U discloses a small nightlight for nurses' rounds. These solutions can reduce disturbance to patients, but still cannot achieve a completely undisturbed effect. On the other hand, during night rounds, if nurses do not hear obvious breathing or snoring from patients, they often need to check the patient's mouth and nose for breathing, feel for a pulse, and palpate the carotid artery to determine if the patient has normal vital signs. However, this method requires not only a light source but also physical contact with the patient, which disturbs their sleep, is inconvenient, and increases the nurse's workload.

[0004] For patients with milder symptoms, it is important for nurses to promptly observe any abnormal physiological signals and take appropriate measures to prevent the condition from worsening. For disabled patients unable to turn over independently, another important task for nighttime nurses is to prevent pressure injuries, which involves assisting them to turn over regularly (e.g., every two hours). Currently, clinical nurses commonly perform these examinations by simply turning on the lights or using flashlights or other light sources, which also has drawbacks such as disturbing the patient's sleep.

[0005] Therefore, it is necessary to improve existing technologies to provide more reliable solutions. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an intelligent portable nurse night patrol mirror device to address the shortcomings of the prior art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an intelligent portable nurse night patrol mirror device, including a night patrol mirror body, the night patrol mirror body including a housing, an infrared camera and an infrared LED light disposed on the front panel of the housing, a display screen disposed on the back panel of the housing, a host module disposed inside the housing, and a power module disposed inside the housing. The host module includes an image processing module, an image signal analysis module, and an early warning module for abnormal skin pressure in disabled patients; The image processing module processes the original image containing the patient captured by the infrared camera to obtain a preprocessed image. The image signal analysis module analyzes the preprocessed image to obtain the patient's facial contour image, facial temperature value, and contour change signal, and determines whether the patient has abnormal vital signs. The display screen shows images captured by the infrared camera and the analysis results from the image signal analysis module.

[0008] Preferably, the housing is provided with operation buttons and a charging interface.

[0009] Preferably, the image processing module performs noise reduction processing on the original infrared image containing the patient captured by the infrared camera using a median filter or a Gaussian filter to obtain a preprocessed image.

[0010] Preferably, the analysis method of the image signal analysis module is as follows: 1) The Canny edge detection algorithm is used to obtain the facial contour image from the preprocessed image; 2) Convert the grayscale value of each pixel in the facial contour image into the corresponding temperature value, and average the temperature values ​​of all pixels to obtain the facial temperature value. 3) Obtain the midpoint of the bottom edge of the facial contour image, and select the rectangular area obtained by extending 40-100cm downwards towards the feet from the midpoint and extending 10-25cm to the shoulders on both sides as the region of interest image. Use the Canny edge detection algorithm to obtain the edge contour image of the patient's torso within the region of interest image. 4) Obtain the comprehensive difference Dfi between the edge contour images at the current time ti and the previous time ti-1: Align and overlap the region of interest image Pri at time ti with the region of interest image Pri-1 at time ti-1. Then obtain the area ΔS of the region between the edge contour image Pli in Pri and the edge contour image Pli-1 in Pri-1. Obtain the area Si of the edge contour image Pli. Calculate the comprehensive difference degree Dfi, Dfi=(ΔS / Si)×100%. Use Dfi as the contour change signal of the patient. 5) If either condition a or b is met at the current time ti, the vital signs signal is determined to be abnormal, and a warning message is displayed on the screen: a. The facial temperature is lower than the preset threshold εt, where εt = 25-37℃; b. The overall difference degree Dfi is lower than the preset threshold εDf, where εDf = 0.5-10%.

[0011] 6) The current patient is continuously observed for a period of time T, where T = 3-20 seconds. If no abnormal vital signs are observed within this time T, the observation of the current patient is terminated.

[0012] Preferably, the intelligent portable nurse night patrol mirror device further includes a physiological signal monitoring module, which is installed at the patient end to monitor the patient's blood pressure and blood oxygen concentration. The physiological signal monitoring module includes a blood pressure sensor and a blood oxygen sensor.

[0013] Preferably, the host module further includes a physiological signal analysis module wirelessly connected to the physiological signal monitoring module. The physiological signal analysis module is used to determine whether there are any abnormalities in the physiological parameters acquired by the physiological signal monitoring module, and its analysis method is as follows: The patient's current physiological parameter values ​​are compared with the pre-acquired physiological parameter values ​​of the patient when awake. When the difference between the two is greater than a pre-set threshold εs, the physiological parameters are judged to be abnormal, and a warning message is displayed on the screen. Difference = (Physiological parameter value at current moment - Physiological parameter value when awake) / Physiological parameter value when awake; Physiological parameters include blood pressure and blood oxygen concentration.

[0014] Preferably, when the patient is a disabled patient who is unable to turn over independently, the monitoring device further includes several pressure sensors attached to the patient's skin and a pressure analysis module that is communicatively connected to the several pressure sensors. The pressure analysis module is wirelessly connected to the disabled patient's abnormal skin pressure early warning module. The pressure analysis module is used to determine whether there are any abnormalities in the pressure parameters. The analysis method is as follows: If the pressure value monitored by the pressure sensor is greater than εF1, or if the pressure value monitored by the pressure sensor has been greater than εF2 for 1-4 hours up to the current time, then the pressure parameter is judged to be abnormal. The judgment result is sent to the disabled patient skin pressure abnormality early warning module, and then the early warning information of abnormal pressure parameter is displayed on the display screen.

[0015] Preferably, the intelligent portable nurse night patrol goggle device further includes a fixing component connected to the night patrol goggle body, for wearing the night patrol goggle body on the nurse's head and in front of the user's eyes.

[0016] Preferably, the housing of the night patrol mirror body is provided with a connector, and the fastener is a headgear type fastener, including a headgear and a connecting rod connected to the front of the headgear and detachably connected to the connector; The fastener is a clamping fastener, which includes a clamping rod that is detachably connected to a connector on the night patrol glasses body and a clamping claw at the end of the clamping rod. The clamping claw clamps onto the temple or frame of the glasses, thereby fixing the night patrol glasses body onto the user's glasses and positioning it in front of the glasses.

[0017] Preferably, the intelligent portable nurse night patrol mirror device also includes a viewing window on the housing, through which the wearer can directly observe the real scene; The viewing window and the display screen are spaced apart vertically, allowing the user to switch between observing the real scene and viewing the infrared image captured by the infrared camera on the display screen by simply moving their eyes up and down.

[0018] The beneficial effects of this invention are: The invention provides "night vision capability that does not disturb patients' sleep" as the core of a wearable device for nursing. The intelligent portable nurse night patrol device applies low-cost active near-infrared night vision technology to medical night patrol scenarios for the first time in a miniaturized, monocular display, and modular form. It can achieve the effect of not disturbing patients' sleep at all during nurses' night patrols, and provides multiple wearing methods to adapt to the different needs of nurses.

[0019] The night patrol device of this invention enables nurses to determine whether a patient is at risk of abnormal vital signs during nighttime ward rounds without turning on lights or using other visible light sources, or by making contact with the patient. Only when such risk exists is further detection by contacting the patient required. This minimizes the impact on patients' sleep during nighttime ward rounds. Furthermore, the device's automatic judgment reduces the workload of nurses and improves convenience.

[0020] The image signal analysis module of this invention combines facial temperature indicators (facial temperature value) and contour image change indicators (comprehensive difference degree Dif) to determine whether there are abnormalities in vital signs. Only when both indicators meet the requirements for normal vital signs—that is, facial temperature value ≥ εt and comprehensive difference degree Dif ≥ εεDf—will the vital signs be judged as normal. Conversely, if either indicator is abnormal, the patient's vital signs are assessed, thus ensuring the accuracy of the assessment when vital signs are normal and improving the safety of the assessment. Furthermore, this method requires no contact with the patient and does not require visible light assistance, so it does not disturb the patient's sleep. It is also convenient, efficient, and reduces the workload of nurses.

[0021] In some embodiments of the present invention, the physiological signal monitoring module compares the patient's current physiological parameter values ​​with their normal physiological parameter values ​​and analyzes the degree of difference between the two. This can be used as an indicator of whether the patient's physiological signals have undergone abnormal changes. When the difference is too large, it indicates that the patient's body has an abnormality and further testing and other treatment measures are required. This makes it easier for nurses to detect abnormalities in the patient's body in a timely manner and take appropriate measures to prevent the situation from worsening.

[0022] For disabled patients who are unable to turn over independently, this invention uses several pressure sensors and a pressure analysis module to monitor the pressure on the patient's skin. When the pressure is applied for too long, a warning message can be displayed on the screen on the night patrol mirror to remind nurses to turn the disabled patient over, which is beneficial for the care of disabled patients.

[0023] The main modules and components of the night patrol device of the present invention (such as infrared camera, infrared LED light, power module, display screen, etc.) can all be conventional products that are already mass-produced and have low cost. It has significant low cost characteristics, which is conducive to large-scale production and market application. Moreover, it has a compact structure, simple operation, high convenience, and comfortable and flexible wearing, and has broad market application prospects. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the intelligent portable nurse night patrol mirror device in Example 1; Figure 2 This is a schematic diagram of the inner structure of the intelligent portable nurse night patrol mirror device in Example 1; Figure 3 This is a top view of the intelligent portable nurse night patrol mirror device in Example 1; Figure 4 This is a schematic diagram of the night patrol mirror body of the intelligent portable nurse night patrol mirror device in Example 1; Figure 5This is a schematic block diagram of the main unit module of the intelligent portable nurse night patrol mirror device in Example 1; Figure 6 This is a flowchart of the analysis method of the image signal analysis module in Example 1; Figure 7 This is a schematic diagram of the night patrol mirror body and the headgear-type fastener assembled in Example 1. Figure 8 This is a schematic diagram of the night patrol mirror body and the clamping fastener assembled in Example 2. Figure 9 This is a schematic diagram of the external structure of the intelligent portable nurse night patrol mirror device in Example 3; Figure 10 This is a schematic diagram of the inner structure of the intelligent portable nurse night patrol mirror device in Example 3; Figure 11 This is a schematic block diagram of the main unit module of the intelligent portable nurse night patrol mirror device in Example 4; Figure 12 This is a schematic block diagram of the main unit module of the intelligent portable nurse night patrol mirror device in Example 5; Explanation of reference numerals in the attached figures: 1—Night patrol goggle body; 2—House; 3—Infrared camera; 4—Infrared LED light; 5—Display screen; 6—Main unit module; 7—Power module; 8—Head cover type fastener; 9—Clamping type fastener; 21—Operation button; 22—Charging interface; 23—Transparent window; 24—Connector; 61—Image processing module; 62—Image signal analysis module; 63—Physiological signal analysis module; 64—Early warning module for abnormal skin pressure in disabled patients; 81—Head cover; 82—Connecting rod; 91—Clamping rod; 92—Gripper. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the materials and reagents used in the following examples are commercially available. For examples where specific conditions are not specified, conventional conditions or conditions recommended by the manufacturer are followed. For reagents or instruments whose manufacturers are not specified, they are all commercially available products.

[0027] The present invention provides an intelligent portable nurse night patrol mirror device, including a night patrol mirror body 1. The night patrol mirror body 1 includes a housing 2, an infrared camera 3 and an infrared LED light 4 disposed on the front panel of the housing 2, a display screen 5 disposed on the back panel of the housing 2, a host module 6 disposed inside the housing 2, and a power module 7 disposed inside the housing 2. The host module 6 includes an image processing module 61, an image signal analysis module 62, and an early warning module for abnormal skin pressure in disabled patients 64; The image processing module 61 processes the original image containing the patient captured by the infrared camera 3 to obtain a preprocessed image. The image signal analysis module 62 analyzes the preprocessed image to obtain the patient's facial contour image, facial temperature value and contour change signal, and determines whether the patient has abnormal vital signs. Display screen 5 shows the images captured by infrared camera 3 and the analysis results of image signal analysis module 62.

[0028] In a preferred embodiment, the housing 2 is provided with an operation button 21 and a charging interface 22. The power module 7 is a rechargeable battery, which is charged through the charging interface 22. The power module 7 is used to power other modules (infrared camera 3, infrared LED light 4, display screen 5, and main unit module 6). The operation button 21 is used to perform related control operations on the night patrol mirror body 1. The operation button 21 is used to control the power on / off, and to control the infrared camera 3, infrared LED light 4, display screen 5, and main unit module 6.

[0029] In a preferred embodiment, the image processing module 61 performs noise reduction processing on the original infrared image containing the patient captured by the infrared camera 3 using a median filter or a Gaussian filter to obtain a preprocessed image. Infrared images often contain thermal noise, which can be effectively reduced by median filtering or Gaussian filtering while preserving important structures such as edges.

[0030] In a preferred embodiment, the analysis method of the image signal analysis module 62 is as follows: 1) The Canny edge detection algorithm is used to obtain the facial contour image from the preprocessed image; 2) Convert the grayscale value of each pixel in the facial contour image into the corresponding temperature value, and average the temperature values ​​of all pixels to obtain the facial temperature value. The conversion between temperature values ​​and grayscale values ​​is a common method, usually using the following formula: T = a × G + b; T: Target temperature (unit: degrees Celsius); G: The grayscale value (or raw digital value, such as 0-255 or 0-65535) of a pixel in an infrared image; a: Gain or slope parameter, representing the rate of temperature change corresponding to the change in grayscale value.

[0031] b: Offset or intercept parameter used to adjust the temperature reference point; Among them, parameters a and b are the calibration parameters of the infrared camera 3 itself, which can be obtained through product information.

[0032] 3) Obtain the midpoint of the bottom edge of the facial contour image, and select the rectangular area obtained by extending 40-100cm downwards towards the feet from the midpoint and extending 10-25cm to the shoulders on both sides as the region of interest image. Use the Canny edge detection algorithm to obtain the edge contour image of the patient's torso within the region of interest image. In this invention, the midpoint of the bottom edge of the facial contour image roughly corresponds to the area near the human chin. A rectangular area 40-100cm below this position and 10-25cm to the left and right can basically cover the chest and abdomen area of ​​the human body.

[0033] 4) Obtain the comprehensive difference Dfi between the edge contour images at the current time ti and the previous time ti-1: Align and overlap the region of interest image Pri at time ti with the region of interest image Pri-1 at time ti-1. Then obtain the area ΔS of the region between the edge contour image Pli in Pri and the edge contour image Pli-1 in Pri-1. Obtain the area Si of the edge contour image Pli. Calculate the comprehensive difference degree Dfi, Dfi=(ΔS / Si)×100%. Use Dfi as the contour change signal of the patient. 5) If either condition a or b is met at the current time ti, the vital signs signal is determined to be abnormal, and a warning message is displayed on screen 5: a. The facial temperature is lower than the preset threshold εt, where εt = 25-37℃; b. The overall difference degree Dfi is lower than the preset threshold εDf, where εDf = 0.5-10%.

[0034] 6) The current patient is continuously observed for a period of time T, where T = 3-20 seconds. If no abnormal vital signs are observed within this time T, the observation of the current patient is terminated.

[0035] The main principle of the image signal analysis module 62 in determining whether there are abnormalities in vital signs signals is as follows: One of the most important tasks for nurses during night rounds is to check whether patients (especially critically ill patients) have normal vital signs, i.e., whether they are alive. Currently, nurses typically check by turning on the lights or using a flashlight or other light source during night rounds. If they don't hear obvious breathing or snoring, they check the patient's mouth and nose for breathing, feel for a pulse, and check the carotid artery to determine if the patient has normal vital signs. However, this method still requires a light source and physical contact with the patient, which may disturb their sleep, is inconvenient, and increases the nurse's workload.

[0036] The main objective of this invention is to enable night rounds using the night-circuit goggles device, without the need for lights or other visible light sources, and without contact with the patient, to determine if there is a risk of abnormal vital signs in a patient. Only when such a risk is identified is further testing involving contact with the patient necessary. This minimizes disruption to patients' sleep during night rounds, and the automated assessment reduces nurses' workload and increases convenience. Specifically, the assessment logic of this invention is as follows: (1) Body temperature is one of the vital signs of the human body. The body temperature of patients with normal vital signs is generally around 36.5℃. The night patrol mirror device of the present invention uses an infrared camera 3 and infrared LEDs for image detection. Near-infrared light is invisible to the human eye and will not disturb the patient at all. Moreover, relevant temperature information can be easily obtained through infrared images. Since the body may be covered with blankets or other items when sleeping, which have a blocking effect on infrared rays, and the human face is usually exposed, the first judgment indicator used in the present invention is to detect the average temperature of the patient's face. However, when the average temperature is too low (below the threshold εt), it can be judged that the vital signs are abnormal. In the preferred embodiment, the threshold εt is set to 25-37℃. Considering factors such as ambient temperature and individual differences, the threshold can be appropriately lower than the normal body temperature to reduce misjudgment. Therefore, in a further preferred embodiment, the threshold εt is set to 28-35℃.

[0037] (2) When a person is sleeping, breathing causes obvious and regular fluctuations in the chest and abdomen area. In this invention, the contour changes of the chest and abdomen area at different times in infrared images are detected to determine whether the patient is breathing, thus serving as another indicator for judging whether the patient has normal vital signs (i.e., whether the patient is alive).

[0038] First, in this invention, based on the facial contour image obtained in the previous step, the midpoint of the bottom edge of the image is selected as the starting point. This midpoint roughly corresponds to the area near the chin. Then, extending 40-100cm downwards towards the feet and 10-25cm to the left and right shoulders from this midpoint, a rectangular area is obtained that basically covers the chest and abdomen area of ​​the human body. A contour image is obtained from this area. This contour image is an image with significant grayscale changes. For patients without blankets or other coverings, this contour image can be considered the body contour image of the patient's chest and abdomen area. For patients covered with blankets or other coverings, it can be considered the body contour image of the chest and abdomen area covered by a thick blanket. As long as the patient breathes normally, the contour image will fluctuate periodically over time. When the patient makes significant body movements, the contour image will also change significantly. Furthermore, regardless of the patient's sleeping position, the contour image will exhibit the above-mentioned pattern of change. For example, when the patient is lying supine or prone, it rises and falls vertically; when lying on their side, it rises and falls horizontally. Therefore, in this invention, by comparing contour changes over a continuous time period, it is possible to determine whether there are normal respiratory fluctuations or other larger-amplitude movements. That is, a significant change in the contour image over a continuous time period indicates that the patient has obvious vital signs, i.e., is alive. In this invention, the change in the contour image is characterized by comparing the comprehensive difference (Dif) of the edge contour image at adjacent time points. The larger the value, the greater the change in the contour image over time, indicating more obvious vital signs. Therefore, when Dif is below the threshold εDif, the change in the contour image can be considered too small, indicating a risk of abnormal vital signs. Considering the human respiratory rate, in a preferred embodiment, the difference between adjacent time points can be set to 0.5-1 second.

[0039] (3) This invention combines facial temperature indicators (facial temperature value) and contour image change indicators (comprehensive difference degree Dif) to determine whether there are abnormalities in vital signs. Only when both indicators meet the requirements for normal vital signs, i.e., facial temperature value ≥ εt and comprehensive difference degree Dif ≥ εDf, will the vital signs be judged to be normal. If either indicator is abnormal, the patient's vital signs will be judged, thus ensuring the accuracy of the judgment when the vital signs are normal and improving the safety of the judgment. At the same time, this judgment method does not require contact with the patient or the use of visible light assistance, and will not disturb the patient's sleep at all. It is also convenient, efficient, and can reduce the workload of nurses.

[0040] In a preferred embodiment, the intelligent portable nurse night patrol device further includes a physiological signal monitoring module, which is installed at the patient end to monitor the patient's blood pressure and blood oxygen concentration. The physiological signal monitoring module includes a blood pressure sensor and a blood oxygen sensor. The host module 6 also includes a physiological signal analysis module 63 that is wirelessly connected to the physiological signal monitoring module. The physiological signal analysis module 63 is used to determine whether there are any abnormalities in the physiological parameters acquired by the physiological signal monitoring module. Its analysis method is as follows: The patient's current physiological parameter values ​​are compared with the pre-acquired physiological parameter values ​​of the patient when awake. When the difference between the two is greater than the pre-set threshold εs, the physiological parameters are judged to be abnormal, and a warning message is displayed on the display screen 5. Difference = (Physiological parameter value at current moment - Physiological parameter value when awake) / Physiological parameter value when awake; Among them, physiological parameters include blood pressure and blood oxygen concentration. The thresholds εs1 for blood pressure and εs2 for blood oxygen concentration can be selected conventionally according to the actual situation.

[0041] During nighttime rounds, another important task is to monitor for abnormalities in the patient's key physiological signals, enabling timely detection to prevent potential dangers. This invention uses a physiological signal monitoring module to compare the patient's current physiological parameter values ​​with their normal values, analyzing the degree of difference. This serves as an indicator of whether the patient's physiological signals have undergone abnormal changes. If the difference is too large, it indicates an abnormality in the patient's body, requiring further testing and treatment.

[0042] In a preferred embodiment, when the patient is a disabled patient who is unable to turn over independently, the monitoring device further includes several pressure sensors attached to the patient's skin and a pressure analysis module that is communicatively connected to the several pressure sensors. The pressure analysis module is wirelessly connected to the disabled patient skin pressure abnormality early warning module 64. The pressure analysis module is used to determine whether there are any abnormalities in the pressure parameters. The analysis method is as follows: If the pressure value monitored by the pressure sensor is greater than εF1, or if the pressure value monitored by the pressure sensor has been greater than εF2 for 1-4 hours up to the current moment, then the pressure parameter is judged to be abnormal. The judgment result is sent to the disabled patient skin pressure abnormality early warning module 64, and then the early warning information of the abnormal pressure parameter is displayed on the display screen 5. Several pressure sensors are distributed on the patient's back and both sides of the waist, which are common pressure-bearing locations. Each pressure sensor has a unique number, so it is possible to determine which pressure sensor is abnormal and thus know which part of the pressure parameter is abnormal.

[0043] The pressure analysis module is wirelessly connected to the display screen 5. The pressure analysis module continuously monitors disabled patients who are unable to turn over independently. When the patient's pressure parameters are abnormal, the pressure analysis module packages the abnormal information with the patient's information and sends it to the disabled patient skin pressure abnormality warning module of the night patrol mirror body 1. Finally, the disabled patient skin pressure abnormality warning module sends the judgment result to the display screen 5, thereby displaying the warning information to the nurse and reminding the nurse to take measures such as assisting the patient to turn over.

[0044] For disabled patients who are unable to turn over independently, an important task for nighttime nurses is to prevent pressure injuries. This is achieved by assisting the patient to turn over regularly (e.g., every two hours). In this invention, several pressure sensors and a pressure analysis module can monitor the pressure on the disabled patient's skin. When the pressure is applied for an extended period, a warning message can be displayed on the screen 5 on the nighttime patrol mirror 1 to remind the nurse to turn the disabled patient over.

[0045] In this invention, the data storage unit of the host module 6 stores the personal information of each patient, including name, unique number, condition, etc., as well as the physiological parameter values ​​of each patient when awake, which can be called up by the physiological signal monitoring module at any time.

[0046] When using the device, nurses first obtain the personal information of each patient in the ward using the ward door number and bed number. Then, they use the infrared camera 3 of the night patrol device to aim at the patient and first use the image signal analysis module 62 to determine if there are any abnormal vital signs. If there are abnormal vital signs, the nurse takes appropriate measures, including moving closer to the patient to check for breathing and pulse. If there are no abnormal vital signs, the nurse selects physiological signal analysis via the operation button 21 and the display screen 5. At this time, the physiological signal analysis module 63 is activated to analyze the current patient's physiological parameters. The physiological signal analysis module 63 retrieves the patient's physiological parameter values ​​when awake from the data storage submodule as comparison data for analysis. When there are abnormal physiological parameters, an early warning message is issued and displayed on the display screen 5, prompting the nurse to conduct further examinations and other appropriate measures.

[0047] If the current patient's personal information indicates that they are a disabled patient unable to turn over independently, the disabled patient skin pressure abnormality early warning module 64 displays on the display screen 5 whether the current patient has abnormal pressure parameters and the time when the abnormal pressure parameters last occurred. If there has been no previous abnormal pressure parameters, it displays "No abnormal pressure parameter history." If the current patient has abnormal pressure parameters, the display screen 5 displays the early warning information, reminding the nurse to take measures such as assisting the patient to turn over. In other words, for disabled patients, when an abnormal pressure parameter occurs, an early warning information will be sent in real time to the disabled patient skin pressure abnormality early warning module 64 of the night patrol mirror body 1 and displayed on the display screen 5 to remind the nurse. When the nurse visits the disabled patient during rounds, the disabled patient skin pressure abnormality early warning module 64 will display the abnormal pressure parameter information again.

[0048] In a preferred embodiment, the intelligent portable nurse night patrol goggle device further includes a fixing member connected to the night patrol goggle body 1, for wearing the night patrol goggle body 1 on the nurse's head and in front of the user's eyes.

[0049] In a preferred embodiment, the housing 2 of the night patrol goggle body 1 is provided with a connector 24, and the fixing component is a headgear 81 type fixing component 8, including a headgear 81 and a connecting rod 82 connected to the front of the headgear 81 and detachably connected to the connector 24 (such as by snap-fit, threaded connection, magnetic connection, etc.). This method is universal; the user simply wears the headgear 81 on their head, adjusts the position, and positions the night patrol goggle body 1 directly in front of the left or right eye. The size of the headgear 81 is adjustable to accommodate different users.

[0050] The fastener is a clamp-type fastener 9, including a clamping rod 91 detachably connected to a connector 24 on the night patrol goggle body 1 and a clamping claw 92 located at the end of the clamping rod 91. The clamping claw 92 clamps the goggle body 1 onto the temple or frame of the goggle, thus securing it to the user's glasses and placing it in front of the glasses. This method is specific to nurses who wear glasses, but it offers the advantage of being more compact.

[0051] In a preferred embodiment, the intelligent portable nurse night patrol mirror device also includes a viewing window 23 on the housing 2, through which the wearer can directly observe the real scene; The viewing window 23 and the display screen 5 are spaced apart vertically, allowing the user to switch between viewing the real scene and the infrared image captured by the infrared camera 3 on the display screen 5 by moving their eyes up and down. For example, with the viewing window 23 at the top and the display screen 5 at the bottom, when the nurse is looking straight ahead, they can observe the real scene through the viewing window 23, and when they move their eyes downwards, they can observe the infrared image captured by the infrared camera 3 on the display screen 5.

[0052] The above is the general concept of the present invention. Based on this, detailed embodiments and comparative examples are provided below to further illustrate the present invention.

[0053] Example 1 An intelligent portable nurse night patrol mirror device includes a night patrol mirror body 1. The night patrol mirror body 1 includes a housing 2, an infrared camera 3 and an infrared LED light 4 disposed on the front panel of the housing 2, a display screen 5 disposed on the back panel of the housing 2, a host module 6 disposed inside the housing 2, and a power module 7 disposed inside the housing 2. The host module 6 includes an image processing module 61, an image signal analysis module 62, and an early warning module for abnormal skin pressure in disabled patients 64; The image processing module 61 processes the original image containing the patient captured by the infrared camera 3 to obtain a preprocessed image. The image signal analysis module 62 analyzes the preprocessed image to obtain the patient's facial contour image, facial temperature value and contour change signal, and determines whether the patient has abnormal vital signs. Display screen 5 shows the images captured by infrared camera 3 and the analysis results of image signal analysis module 62.

[0054] In this embodiment, the housing 2 is equipped with an operation button 21 and a charging interface 22. The power module 7 is a rechargeable battery, which is charged through the charging interface 22. The operation button 21 is used to perform relevant control operations on the night patrol mirror body 1.

[0055] The image processing module 61 performs noise reduction processing on the original infrared image containing the patient captured by the infrared camera 3 using a median filter to obtain a preprocessed image.

[0056] The infrared LED light has a wavelength of 940nm.

[0057] In this embodiment, the analysis method of the image signal analysis module 62 is as follows: 1) The Canny edge detection algorithm is used to obtain the facial contour image from the preprocessed image; 2) Convert the grayscale value of each pixel in the facial contour image into the corresponding temperature value, and average the temperature values ​​of all pixels to obtain the facial temperature value. The conversion between temperature values ​​and grayscale values ​​is a common method, usually using the following formula: T = a × G + b; T: Target temperature (unit: degrees Celsius); G: The grayscale value of a pixel in an infrared image; a: Gain or slope parameter, representing the rate of temperature change corresponding to the change in grayscale value.

[0058] b: Offset or intercept parameter used to adjust the temperature reference point; Among them, parameters a and b are the calibration parameters of the infrared camera 3 itself, which are obtained through product information.

[0059] 3) Obtain the midpoint of the bottom edge of the facial contour image, and select the rectangular area obtained by extending 60cm downwards towards the feet from the midpoint and extending 20cm to the left and right shoulders as the region of interest image. Use the Canny edge detection algorithm to obtain the edge contour image of the patient's torso within the region of interest image. 4) Obtain the comprehensive difference Dfi between the edge contour images at the current time ti and the previous time ti-1: Align and overlap the region of interest image Pri at time ti with the region of interest image Pri-1 at time ti-1. Then obtain the area ΔS of the region between the edge contour image Pli in Pri and the edge contour image Pli-1 in Pri-1. Obtain the area Si of the edge contour image Pli. Calculate the comprehensive difference degree Dfi, Dfi=(ΔS / Si)×100%. Use Dfi as the contour change signal of the patient. Where, ti-ti-1 (the difference between adjacent time points) = 0.75s 5) If either condition a or b is met at the current time ti, the vital signs signal is determined to be abnormal, and a warning message is displayed on screen 5: a. The facial temperature is lower than the preset threshold εt, εt=32℃; b. The overall difference degree Dfi is lower than the preset threshold εDf, εDf=2.5%.

[0060] 6) The current patient is continuously observed for a period of time T, where T = 5 seconds. If no abnormal vital signs are observed within this time T, the observation of the current patient is terminated.

[0061] The intelligent portable nurse night patrol goggle device also includes a fastener that connects to the night patrol goggle body 1, so that the night patrol goggle body 1 can be worn on the nurse's head and placed in front of the user's eyes.

[0062] In this embodiment, the housing 2 of the night patrol mirror body 1 is provided with a connector 24, and the fixing component is a headgear 81 type fixing component 8, including a headgear 81 and a connecting rod 82 connected to the front of the headgear 81 and detachably connected (plugged in) to the connector 24; this method is universal, the user wears the headgear 81 (the size of the headgear 81 can be adjusted) on the head, adjusts the position so that the night patrol mirror body 1 is directly in front of the left or right eye.

[0063] Example 2 The only difference between this example and Example 1 is that: In this example, the fastener is a clamping fastener 9, including a clamping rod 91 detachably connected to the connector 24 on the night patrol goggle body 1 and a clamping claw 92 located at the end of the clamping rod 91. The clamping claw 92 clamps onto the temples or frames of the goggles, thus securing the night patrol goggle body 1 to the user's glasses, placing it in front of the glasses. The clamping claw 92 has a conventional structure, capable of clamping and fixing onto the temples of the glasses for secure attachment. This method is specific to nurses who wear glasses, but it also offers the advantage of being more compact.

[0064] Example 3 The only difference between this example and Example 1 is that: In this example, the intelligent portable nurse night patrol mirror device also includes a viewing window 23 on the housing 2, through which the wearer can directly observe the real scene; The viewing window 23 and the display screen 5 are spaced apart vertically, allowing the user to switch between viewing the real scene and the infrared image captured by the infrared camera 3 on the display screen 5 by moving their eyes up and down. For example, with the viewing window 23 at the top and the display screen 5 at the bottom, when the nurse is looking straight ahead, they can observe the real scene through the viewing window 23, and when they move their eyes downwards, they can observe the infrared image captured by the infrared camera 3 on the display screen 5.

[0065] Example 4 The only difference between this example and Example 2 is that: In this example, the intelligent portable nurse night patrol device also includes a physiological signal monitoring module, which is installed at the patient's end to monitor the patient's blood pressure and blood oxygen concentration. The physiological signal monitoring module includes a blood pressure sensor and a blood oxygen sensor. The host module 6 also includes a physiological signal analysis module 63, which is wirelessly connected to the physiological signal monitoring module. The physiological signal analysis module 63 is used to determine whether there are any abnormalities in the physiological parameters acquired by the physiological signal monitoring module. Its analysis method is as follows: The patient's current physiological parameter values ​​are compared with the pre-acquired physiological parameter values ​​of the patient when awake. When the difference between the two is greater than the pre-set threshold εs, the physiological parameters are judged to be abnormal, and a warning message is displayed on the display screen 5. Difference = (Physiological parameter value at current moment - Physiological parameter value when awake) / Physiological parameter value when awake; The physiological parameters include blood pressure and blood oxygen concentration. The thresholds εs1 for blood pressure and εs2 for blood oxygen concentration can be selected conventionally according to the actual situation. In this embodiment, εs1=0.1 and εs2=0.075.

[0066] During nighttime rounds, another important task is to monitor for abnormalities in the patient's key physiological signals, enabling timely detection to prevent potential dangers. This invention uses a physiological signal monitoring module to compare the patient's current physiological parameter values ​​with their normal values, analyzing the degree of difference. This serves as an indicator of whether the patient's physiological signals have undergone abnormal changes. If the difference is too large, it indicates an abnormality in the patient's body, requiring further testing and treatment.

[0067] Example 5 The only difference between this example and Example 4 is that: The monitoring device also includes several pressure sensors attached to the patient's skin and a pressure analysis module that is communicatively connected to the pressure sensors. The pressure analysis module is wirelessly connected to the disabled patient's abnormal skin pressure early warning module 64. The pressure analysis module is used to determine whether there are any abnormalities in the pressure parameters. The analysis method is as follows: If the pressure value monitored by the pressure sensor is greater than εF1, or if the pressure value monitored by the pressure sensor has been greater than εF2 for 2 hours up to the current time, then the pressure parameter is judged to be abnormal. The judgment result is sent to the disabled patient skin pressure abnormality early warning module 64, and then the early warning information of the abnormal pressure parameter is displayed on the display screen 5. Several pressure sensors are distributed on the patient's back and both sides of the waist, which are common pressure-bearing locations. Each pressure sensor has a unique number, so it is possible to determine which pressure sensor is abnormal and thus which part of the pressure parameter is abnormal.

[0068] The pressure analysis module is wirelessly connected to the display screen 5. The pressure analysis module continuously monitors disabled patients who are unable to turn over independently. When the patient's pressure parameters are abnormal, the pressure analysis module packages the abnormal information with the patient's information and sends it to the disabled patient skin pressure abnormality warning module of the night patrol mirror body 1. Finally, the disabled patient skin pressure abnormality warning module sends the judgment result to the display screen 5, thereby displaying the warning information to the nurse and reminding the nurse to take measures such as assisting the patient to turn over.

[0069] In the above embodiments, the data storage submodule of the host module 6 stores the personal information of each patient, including name, unique number, condition, etc., as well as the physiological parameter values ​​of each patient when awake, which can be called by the physiological signal monitoring module at any time.

[0070] When using the device, the nurse wears it on their head (selecting the fixing structure of Embodiment 1 or Embodiment 2 depending on whether they wear glasses), with the night patrol mirror body 1 positioned directly in front of their right eye. The nurse first obtains the personal information of each patient in the ward using the ward's door number and bed number. Then, the infrared camera 3 of the night patrol mirror is aimed at the patient. The image signal analysis module 62 first determines if there are any abnormal vital signs. If abnormal vital signs are detected, the nurse takes appropriate action, including approaching the patient to check for breathing and pulse. If no abnormal vital signs are detected, the nurse selects physiological signal analysis via operation button 21 and display screen 5. At this time, the physiological signal analysis module 63 is activated, analyzing the current patient's physiological parameters. The physiological signal analysis module 63 retrieves the patient's physiological parameter values ​​when awake from the data storage submodule as comparative data for analysis. If abnormal physiological parameters are detected, a warning message is issued and displayed on display screen 5, prompting the nurse to conduct further examinations and other appropriate treatments.

[0071] If the current patient's personal information indicates that they are a disabled patient unable to turn over independently, the disabled patient skin pressure abnormality early warning module 64 displays on the display screen 5 whether the current patient has abnormal pressure parameters and the time when the abnormal pressure parameters last occurred. If there has been no previous abnormal pressure parameters, it displays "No abnormal pressure parameter history." If the current patient has abnormal pressure parameters, the display screen 5 displays the early warning information, reminding the nurse to take measures such as assisting the patient to turn over. In other words, for disabled patients, when an abnormal pressure parameter occurs, an early warning information will be sent in real time to the disabled patient skin pressure abnormality early warning module 64 of the night patrol mirror body 1 and displayed on the display screen 5 to remind the nurse. When the nurse visits the disabled patient during rounds, the disabled patient skin pressure abnormality early warning module 64 will display the abnormal pressure parameter information again.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An intelligent portable nurse night patrol mirror device, characterized in that, The night patrol mirror body comprises a shell, an infrared camera and an infrared LED lamp arranged on the front panel of the shell, a display screen arranged on the back panel of the shell, a host module arranged inside the shell, and a power module arranged inside the shell. The host module comprises an image processing module, an image signal analysis module, and a disabled patient skin pressure abnormality early warning module. The image processing module processes the original image containing the patient collected by the infrared camera to obtain a preprocessed image, the image signal analysis module analyzes the preprocessed image to obtain the facial contour image, the facial temperature value, and the contour change signal of the patient, and judges whether the patient has an abnormal vital sign signal. The display screen displays the image collected by the infrared camera and the analysis result of the image signal analysis module.

2. The intelligent portable nurse night patrol mirror device according to claim 1, characterized in that, The shell is provided with an operation button and a charging interface. 3.The intelligent portable nurse night patrol mirror device according to claim 2, characterized in that, The image processing module adopts median filter or Gaussian filter to perform noise reduction processing on the original infrared image containing the patient collected by the infrared camera to obtain a preprocessed image.

4. The intelligent portable nurse night patrol mirror device according to claim 3, characterized in that, The analysis method of the image signal analysis module is as follows: 1) The Canny edge detection algorithm is used to obtain the facial contour image from the preprocessed image; 2) The gray value of each pixel in the facial contour image is converted into a corresponding temperature value, and the average of the temperature values of all pixels is taken as the facial temperature value; 3) The midpoint of the bottom edge of the facial contour image is obtained, a rectangular region extending 40-100 cm downward from the midpoint in the direction of the feet and extending 10-25 cm to the left and right sides in the direction of the shoulders is selected as the region of interest image, and the Canny edge detection algorithm is used to obtain the edge contour image of the patient's torso in the region of interest image; 4) The comprehensive difference degree Dfi of the edge contour images at the current time ti and the previous time ti-1 is obtained: The region of interest image Pri at the time ti is aligned and overlapped with the region of interest image Pri-1 at the time ti-1, then the area ΔS of the region between the edge contour image Pli in Pri and the edge contour image Pli-1 in Pri-1 is obtained, the area Si of the edge contour image Pli is obtained, the comprehensive difference degree Dfi is calculated, Dfi=(ΔS / Si)×100%, and Dfi is taken as the contour change signal of the patient; 5) When the current time ti meets the following conditions a or b, it is judged that the vital sign signal is abnormal, and the display screen displays the warning information: a. The facial temperature value is lower than the pre-set threshold value εt, εt=25-37℃; b. The comprehensive difference degree Dfi is lower than the pre-set threshold value εDf, εDf=0.5-10%; 6) The current patient is continuously observed for a time T, T=3-20s, if the vital sign signal is not abnormal within the time T, the observation of the current patient is ended.

5. The intelligent portable nurse night patrol mirror device according to claim 1, characterized in that, A physiological signal monitoring module is further included, which is arranged at the patient end and is used to monitor the blood pressure value and the blood oxygen concentration value of the patient. The physiological signal monitoring module comprises a blood pressure sensor and a blood oxygen sensor.

6. The intelligent portable nurse night patrol mirror device according to claim 5, characterized in that, The host module further comprises a physiological signal analysis module in wireless communication connection with the physiological signal monitoring module, which is used to determine whether the physiological parameter acquired by the physiological signal monitoring module is abnormal, and the analysis method is: The physiological parameter value of the patient at the current time is compared with the physiological parameter value of the patient when awake, which is acquired in advance. When the difference between the two is greater than the preset threshold εs, it is determined that the physiological parameter is abnormal, and the warning information is displayed through the display screen; Difference = (physiological parameter value at the current time - physiological parameter value when awake) / physiological parameter value when awake; Wherein, the physiological parameters include blood pressure and blood oxygen concentration.

7. The intelligent portable nurse night tour mirror device according to claim 1, characterized in that, When the patient is a disabled patient who cannot turn over independently, the monitoring device further comprises a plurality of pressure sensors attached to the patient's skin and a pressure analysis module in communication connection with the plurality of pressure sensors, and the pressure analysis module is in wireless communication connection with the disabled patient skin pressure abnormality warning module; The pressure analysis module is used to determine whether the pressure parameter is abnormal, and the analysis method is: If the pressure value monitored by the current pressure sensor is greater than εF1, or the duration of the pressure value monitored by the pressure sensor being always greater than εF2 reaches 1-4h until the current time, it is determined that the pressure parameter is abnormal, and the judgment result is sent to the disabled patient skin pressure abnormality warning module, and the warning information of the abnormal pressure parameter is displayed through the display screen. 8.The intelligent portable nurse night patrol mirror device according to claim 1, characterized in that, It further comprises a fixing member connected with the night patrol mirror body, which is used to wear the night patrol mirror body on the head of the nurse and in front of the eyes of the user. 9.The intelligent portable nurse night patrol mirror device according to claim 8, characterized in that, The shell of the night patrol mirror body is provided with a joint, and the fixing member is a head cover type fixing member, which comprises a head cover and a connecting rod connected with the joint and detachably connected with the joint at the front of the head cover; The fixing member is a clamping type fixing member, which comprises a clamping rod detachably connected with the joint on the night patrol mirror body and a clamping jaw at the end of the clamping rod, which is clamped on the glasses leg or glasses frame, so as to fix and wear the night patrol mirror body on the glasses of the user and in front of the glasses.

10. The intelligent portable nurse night tour mirror device according to claim 1, characterized in that, It further comprises a perspective window opened on the shell, through which the wearer can directly observe the real scene; The perspective window and the display screen are arranged in the up-down direction, so that the user can switch between observing the real scene and the infrared image captured by the infrared camera displayed on the display screen by turning the eyes up and down.

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