Intelligent monitoring and reminding method for postoperative nursing of nephroureteral calculus lithotripsy

Abstract

The invention relates to the field of medical data analysis, in particular to an intelligent monitoring and reminding method for postoperative nursing of nephroureteral calculus lithotripsy, which comprises the following steps of: 1, analyzing a postoperative abdominal cavity image of a patient, and determining the size of an intelligent waistband based on the relative position of a pelvic bone outline and a stent tube outline; 2, acquiring a real-time vertical acceleration, and calibrating the vertical acceleration according to the gravitational acceleration to obtain an acceleration display value; a unit analysis duration is preset, and the acceleration display value change broken line in a plurality of recent unit analysis intervals is analyzed to obtain a motion alarm value; 3, the waist pressure values are divided into four pressure sets according to the four directions of the waist, and the relative pressure sets are divided into a relative set group; analyzing and determining a bending set based on the waist pressure values in each pressure set; 4, analyzing the number of bending sets in the relative set group, and generating a bending reminding signal; the exercise alert value and the exercise alert threshold are compared to generate an overexercise signal.

Description

Technical Field

[0001] The present invention relates to the field of medical data analysis, and particularly to an intelligent monitoring and reminder method for the postoperative care of renal and ureteral calculi lithotripsy. Background Art

[0002] Ureteral calculi are common diseases in the urinary system, mostly caused by kidney stones moving down to the ureter. When the ureteral calculi are too large or cause renal function damage, bilateral ureteral obstruction, and cannot be treated conservatively, surgical lithotripsy or stone removal is required. For some invasive surgical patients, a temporary ureteral stent tube (also called a double-J tube) needs to be placed to promote urine drainage to maintain smooth urine flow and prevent ureteral obstruction.

[0003] During the postoperative recovery care process after the placement of the ureter, special attention needs to be paid to the patient's movement behavior, and movement behaviors such as running, jumping, and bending should be avoided as much as possible to avoid irritation and damage to the ureter, renal pelvis, and bladder. However, there is a lack of a method in the prior art to monitor the movement behavior of patients during the postoperative recovery process, resulting in postoperative injuries to some patients due to inappropriate movement behavior, which has certain defects. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides an intelligent monitoring and reminder method for the postoperative care of renal and ureteral calculi lithotripsy, which can effectively solve the problem that it is difficult to monitor and remind the movement behavior during the postoperative recovery process in the prior art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides an intelligent monitoring and reminder method for the postoperative care of renal and ureteral calculi lithotripsy, which at least includes the following steps:

[0007] Step 1: Analyze the postoperative abdominal image of the patient, construct a positioning coordinate system and mark the pelvic bone and stent tube contours, determine the size of the intelligent belt based on the relative positions of the pelvic bone contour and the stent tube contour, and obtain the three-axis acceleration and waist contact pressure when the patient wears the intelligent belt.

[0008] Step 2: Analyze the real-time vertical acceleration based on the three-axis acceleration and the gyroscope set inside the intelligent belt, and calibrate the vertical acceleration with the gravitational acceleration to obtain the acceleration display value.

[0009] A unit analysis duration is preset, and the movement alarm value is obtained by analyzing the change broken line of the acceleration display value in the recent multiple unit analysis intervals.

[0010] Step 3: Obtain the pressure values at multiple positions around the waist, denoted as waist pressure values. The waist pressure values are divided into two rows, upper and lower. Divide the waist pressure values into four pressure sets according to the four directions of the waist, and divide the opposite pressure sets into a relative set group;

[0011] Analyze the pressure differences based on the waist pressure values in each pressure set, compare the pressure differences with a preset pressure difference threshold, and determine the bending set;

[0012] Step 4: Analyze the number of bending sets in the relative set group and generate a bending reminder signal;

[0013] Compare the exercise alarm value with the exercise reminder threshold and generate an over-exercise signal.

[0014] Further, the intelligent belt size determination process is as follows:

[0015] Construct two straight lines that are tangent to the two side edges of the pelvic contour and parallel to the longitudinal axis, denoted as edge lines. Denote the tangent points of the edge lines and the pelvic contour as the first positioning points;

[0016] Mark the endpoints of the stent tube on the stent tube contour, denoted as edge points. Obtain the vertical coordinates of each edge point, and denote the edge point with the largest vertical coordinate as the second positioning point;

[0017] Construct a connection line between the two first positioning points, denoted as the pelvic reference line. Draw a straight line parallel to the longitudinal axis through the second positioning point, denoted as the stent tube reference line. Denote the intersection point of the stent tube reference line and the pelvic reference line as the third positioning point. Calculate the distance between the second positioning point and the third positioning point and multiply it by a preset distance ratio to obtain the relative distance;

[0018] There are multiple preset wearing sizes. Select the wearing size closest to the relative distance as the target size.

[0019] Further, the vertical acceleration acquisition process is as follows:

[0020] Align the three axes of the triaxial accelerometer with the three axes of the reference space coordinate system respectively, and denote the three-axis acceleration as Corresponding to the x-axis, y-axis, and z-axis of the reference space coordinate system respectively. Align the roll axis, yaw axis, and pitch axis of the gyroscope with the x-axis, y-axis, and z-axis of the reference space coordinate system respectively;

[0021] Based on the directions of the current roll axis, yaw axis, and pitch axis of the gyroscope, construct a real-time space coordinate system. Obtain the offset angles of the three axes of the gyroscope compared with the three axes of the reference space coordinate system, denoted as the three-axis offset angles. Based on the three-axis offset angles, draw a three-axis acceleration vector in the real-time space coordinate system, and obtain the sum of the projection lengths of the three-axis acceleration vector on the z-axis of the real-time space coordinate system, denoted as the vertical acceleration.

[0022] Further, the vertical acceleration calibration process is as follows:

[0023] Obtain the gravitational acceleration denoted as g, and perform display calibration on the vertical acceleration with the gravitational acceleration. Through the formula calculate to obtain the acceleration display value , where is the measured value of the vertical acceleration.

[0024] Further, the independent analysis process of the unit analysis interval is as follows:

[0025] Let the current time be , construct m unit analysis intervals , n = 1, 2, 3,..., m, and m is a preset constant value;

[0026] Obtain the area of the closed figure formed between the acceleration display value change broken line and the time axis and denote it as the total acceleration change value, and obtain the number of intersections between the vertical acceleration display value and the time axis and denote it as the number of changes;

[0027] Analyze in combination with the gravitational acceleration to obtain the airtime duration;

[0028] Based on the wave peaks of the acceleration display value broken line, analyze to obtain the step frequency reference value;

[0029] Denote the total acceleration change value, the number of changes, the airtime duration, and the step frequency reference value corresponding to each unit analysis interval as respectively, obtain the time difference between the current time and the operation completion time and denote it as the postoperative duration ;

[0030] Substitute into the formula:

[0031] for calculation to obtain the motion alarm value , where:

[0032] is the motion reminder threshold;

[0033] represents the function of the motion reminder threshold with respect to the postoperative duration;

[0034] is a preset weight coefficient;

[0035] is a preset acceleration change threshold.

[0036] Further, the airtime duration analysis process is as follows:

[0037] Based on the acceleration due to gravity, a range interval of the acceleration due to gravity [-g - d, -g] is constructed, where d is a preset fluctuation range value. Two straight lines corresponding to the endpoints of the range interval of the acceleration due to gravity are plotted in the line graph of the change in the acceleration display value. The part of the line graph of the change in the acceleration display value within the range interval of the acceleration due to gravity is denoted as the suspended part, and the sum of the projection lengths of the suspended part on the time axis is denoted as the suspended duration.

[0038] Furthermore, the analysis process of the step frequency reference value is as follows:

[0039] There is a preset acceleration peak value, and a straight line corresponding to the acceleration peak value is plotted. The closed figure of the part of the line graph of the change in the acceleration display value above the straight line corresponding to the acceleration peak value is denoted as the peak figure. The projection length of each peak figure on the time axis is denoted as the peak duration. There is a preset peak duration threshold, and the peak figures with a peak duration greater than or equal to the peak duration threshold are denoted as step frequency judgment figures. The number of step frequency judgment figures is denoted as the step frequency reference value.

[0040] Furthermore, the function of the exercise reminder threshold with respect to the postoperative duration The specific expression is:

[0041] ;

[0042] Where: are all preset weight coefficients, and ;

[0043] is the preset normal exercise threshold;

[0044] is the preset time growth coefficient;

[0045] is the preset time convergence coefficient.

[0046] Furthermore, the determination process of the bending set is as follows:

[0047] The lumbar pressure values on the upper and lower sides are respectively denoted as , where j is the serial number of the lumbar pressure value;

[0048] Let the pressure set be , where i is the serial number of the lumbar pressure value in the pressure set, and substitute it into the formula for calculation to obtain the pressure difference , where u is the number of elements in the pressure set. There is a preset pressure difference threshold. When the pressure difference is greater than the pressure difference threshold, the pressure set is denoted as the bending set.

[0049] Furthermore, the signal generation process is as follows:

[0050] The vector sum of the three-axis accelerations is denoted as the motion vector, the magnitude of the motion vector is denoted as the motion reference value, and a motion reference threshold is preset.

[0051] When the motion reference value is less than the motion reference threshold, obtain the number of bending sets in two relative set groups. When the number of bending sets in any one of the relative set groups is equal to 2, generate a bending reminder signal.

[0052] When the motion reference value is greater than or equal to the motion reference threshold, obtain the current motion alarm value. A motion reminder threshold is preset. When the motion alarm value is greater than or equal to the motion reminder threshold, generate a motion excessive signal.

[0053] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0054] 1. By calculating the motion alarm value, the present invention comprehensively evaluates whether the patient has abnormal running and jumping motion behaviors. The larger the motion alarm value, usually the more intense the patient's motion behavior in the recent period of time. By analyzing the motion alarm value, the abnormal motion of the patient can be found in time, so as to generate a reminder signal, avoiding the stent tube from moving or rubbing frequently with the ureter due to excessive motion during the vulnerable period after surgery, reducing the physical harm after surgery, and promoting the rapid recovery of the patient.

[0055] 2. By generating different signals to remind the user to pay attention to postoperative recovery care, on the one hand, it can reduce the amplitude of abnormal motion, prevent potential harm caused by excessive motion amplitude or excessive bending, and avoid physical loss caused by the end of the stent tube falling off or moving. On the other hand, it can provide targeted reminders according to the user's behavior, thus realizing the monitoring and reminder of the user's motion posture and amplitude during the nursing process, effectively balancing the motion safety and activity freedom. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 It is a method step diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] The present invention will be further described below in conjunction with embodiments.

[0060] Refer to Figure 1 , an intelligent monitoring and reminder method for the postoperative care of renal and ureteral calculi lithotripsy, including:

[0061] An intelligent belt is provided with two rows of evenly distributed pressure sensors on it. When the patient wears the intelligent belt, the pressure sensors are distributed around the patient's waist to record the pressure values at multiple points between the patient's back and the contact surface of the belt. A three-axis accelerometer is also provided. When the patient wears the intelligent belt, the three-axis acceleration is recorded in real time.

[0062] It includes at least the following steps:

[0063] Step 1: Denote the ureteral stent tube as the stent tube, obtain the medical imaging pictures (such as X-ray films) of the patient's abdominal cavity after the operation as the abdominal cavity ray diagram, mark the pelvic contour and the stent tube contour in the abdominal cavity ray diagram, construct a plane rectangular coordinate system with the spinal direction as the vertical axis as the positioning coordinate system, draw the pelvic contour and the stent tube contour in the positioning coordinate system, and keep the relative positions of the pelvic contour and the stent tube contour in the positioning coordinate system consistent with those in the abdominal cavity ray diagram. Construct two straight lines that are tangent to the two sides of the pelvic contour and parallel to the vertical axis as the edge lines, and denote the tangent points of the edge lines and the pelvic contour as the first positioning points;

[0064] Mark the endpoints of the stent tube (each stent tube corresponds to two endpoints) on the stent tube contour as the edge points, obtain the vertical coordinates of each edge point, and denote the edge point with the largest vertical coordinate as the second positioning point;

[0065] Construct a connection line between the two first positioning points as the pelvic reference line, draw a straight line parallel to the vertical axis through the second positioning point as the stent tube reference line, denote the intersection point of the stent tube reference line and the pelvic reference line as the third positioning point, calculate the distance between the second positioning point and the third positioning point and multiply it by a preset distance ratio (the distance ratio is the ratio between the unit length in the positioning coordinate system and the actual length), to obtain the relative distance.

[0066] It should be noted that the first positioning point is used to determine the outermost sides on the left and right of the pelvic contour, and the second positioning point is used to locate the two ends of the stent tube.

[0067] There are multiple preset wearing sizes, and the wearing size corresponds to the width of the intelligent belt. Select the wearing size closest to the relative distance as the target size, and wear the intelligent belt corresponding to the target size on the patient's waist.

[0068] It should be noted that due to differences in the human body structures of different age groups, different degrees of bone development, and different body types, the lengths of the renal pelvis, bladder, and ureter are different, resulting in inconsistent heights of the stent tubes after implantation. For some people, the implanted stent tube (relative to the hip bone) is relatively high, while for some people, the implanted stent tube is relatively low (relative to the hip bone). Therefore, it is necessary to analyze the positions of the stent tubes in different patients' bodies in combination with X-ray films, so as to select a suitable intelligent belt to obtain accurate data to evaluate the impact of the patient's bending over on the stent tube.

[0069] Step 2: Analyze and obtain the real-time vertical acceleration based on the triaxial accelerometer and the gyroscope set inside the intelligent belt:

[0070] There is a preset reference space coordinate system, and the directions of the gyroscope and the triaxial accelerometer are calibrated based on the reference space coordinate system:

[0071] Make the three axes of the triaxial accelerometer coincide with the three axes of the reference space coordinate system respectively, and denote the triaxial acceleration as Corresponding to the x-axis, y-axis, and z-axis of the reference space coordinate system respectively, and make the roll axis, yaw axis, and pitch axis of the gyroscope correspond to the x-axis, y-axis, and z-axis of the reference space coordinate system respectively;

[0072] It should be noted that the gyroscope can ensure that the pitch axis is always parallel to the direction of gravity (i.e., the vertical direction)

[0073] Based on the directions of the current roll axis, yaw axis, and pitch axis of the gyroscope, construct a real-time space coordinate system. In the real-time space coordinate system, the z-axis corresponds to the vertical direction. Obtain the offset angles of the three axes of the gyroscope relative to the three axes of the reference space coordinate system and denote them as the three-axis offset angles. Based on the three-axis offset angles, draw the straight lines where the three axes of the reference space coordinate system are located in the three-axis space coordinate system. Combine the currently measured triaxial acceleration to draw a triaxial acceleration vector in the real-time space coordinate system. The triaxial acceleration vector is distributed along the three axes of the reference space coordinate system. Obtain the projection length sum of the triaxial acceleration vector on the z-axis of the real-time space coordinate system (i.e., the modulus of the sum of the components of the triaxial acceleration in the vertical direction, which is the vertical acceleration), and denote it as the vertical acceleration. When the acceleration is vertically upward, the vertical acceleration is positive; conversely, when the acceleration is vertically downward, the vertical acceleration is negative.

[0074] It should be noted that the vertical acceleration obtained through the comprehensive analysis of the gyroscope and the three-axis accelerometer is the real-time acceleration of the intelligent belt along the direction of gravity. The value of the vertical acceleration can reflect the body movement data of the patient when wearing it, and can help analyze the waist movement conditions under various movement behaviors, such as running, jumping, sit-ups, and crunches. Compared with the separately set three-axis accelerometer (which can usually only analyze the movement data of the patient when standing), it can record the movement data of the patient when wearing more comprehensively for subsequent analysis.

[0075] The gravitational acceleration is denoted as g, and the vertical acceleration is calibrated for display with the gravitational acceleration. Through the formula the acceleration display value is calculated as , where is the measured value of the vertical acceleration (for example, when the patient stands still is -g, is 0);

[0076] The real-time acceleration display value constructs a line graph of the acceleration display value changing with time. A preset unit analysis duration T (set by the staff during specific implementation, taking a value of 1 second in a specific embodiment) is set. Let the current moment be , and m unit analysis intervals are constructed, where n = 1, 2, 3,..., m, and m is a preset constant value. The line graph of the change in the acceleration display value within the unit analysis interval is obtained, and the line graph of the change in the acceleration display value within each unit analysis interval is analyzed independently;

[0077] It should be noted that by dividing into multiple unit analysis intervals of fixed duration, the recent behavior data of the patient can be split into multiple continuous segment data, which helps to refine the analysis of the patient's behavior, capture more subtle feature data, and thus more quickly and accurately detect the abnormal movement behavior of the patient.

[0078] The independent analysis process is as follows:

[0079] The area of the closed figure enclosed by the line graph of the change in the acceleration display value and the time axis (when the line graph of the vertical acceleration change passes through the time axis, it is the sum of the areas of multiple closed figures) is denoted as the total acceleration change value, and the number of intersections of the vertical acceleration display value and the time axis is denoted as the number of changes;

[0080] Based on the gravitational acceleration, a gravitational acceleration range interval [-g - d, -g] is constructed, where d is a preset fluctuation range value (the fluctuation range value is set by the staff during specific implementation and takes a value of 3 m² / s in a specific embodiment). In the acceleration display value change line graph, two straight lines corresponding to the endpoints of the gravitational acceleration range interval are drawn. The part of the acceleration display value change line within the gravitational acceleration range interval is denoted as the hovering part, and the sum of the projection lengths of the hovering part on the time axis is denoted as the hovering duration;

[0081] It should be noted that the hovering part usually corresponds to the acceleration value when the patient's body is briefly floating during bouncing or running, and the hovering duration reflects the duration of the patient's body being briefly floating during bouncing or running during the wearing process. The hovering duration is usually proportional to the amplitude of the patient's strenuous exercise. When the patient runs or bounces violently, it will significantly cause the value of the hovering duration to increase, and strenuous exercise will cause frequent impacts on the body, resulting in displacement and movement of the internally implanted stent tube. Therefore, by monitoring the abnormal changes in the hovering duration during the postoperative care of the patient, the patient's incorrect exercise behavior can be detected in a timely manner.

[0082] There is a preset acceleration peak value, and a straight line corresponding to the acceleration peak value is drawn. The closed figure of the part of the acceleration display value change line above the straight line corresponding to the acceleration peak value is denoted as the peak figure. The projection length of each peak figure on the time axis is denoted as the peak duration. There is a preset peak duration threshold, and the peak figure with a peak duration greater than or equal to the peak duration threshold is denoted as the step frequency judgment figure. The number of step frequency judgment figures is denoted as the step frequency reference value;

[0083] It should be noted that when the patient walks or runs, relatively regular vertical acceleration peaks will be generated. The generation of the peaks mainly comes from the forceful push-off before the human foot leaves the ground and the shock absorption and flattening after the foot lands. Usually, one step frequency (i.e., one step during normal walking or running) corresponds to two vertical acceleration peaks, and the shock during the landing process will also cause small peaks. However, through the peak duration threshold, the interference peaks can be filtered out to obtain the step frequency reference value representing the step frequency. The step frequency reference value can be used to judge the patient's moving step frequency, so that by monitoring the step frequency reference value during the postoperative care of the patient, it can be detected in a timely manner whether the patient is running.

[0084] The total acceleration change value, the number of changes, the hovering duration, and the step frequency reference value corresponding to each unit analysis interval are respectively denoted as The time difference between the current time and the time of surgery completion is denoted as the postoperative duration ;

[0085] Substitute into the formula:

[0086] for calculation to obtain the motion alarm value , where:

[0087] is the exercise reminder threshold;

[0088] represents a function of the exercise reminder threshold with respect to the duration after surgery;

[0089] is a preset weight coefficient;

[0090] is a preset acceleration change threshold;

[0091] It should be noted that the exercise alarm value comprehensively reflects the alarm value of whether the patient has abnormal running and jumping exercise behaviors. The larger the exercise alarm value, the more intense the patient's exercise behavior usually is in the recent period. By analyzing the exercise alarm value, the patient's abnormal exercise can be detected in time, so as to generate a reminder signal, avoid the stent tube from moving or rubbing frequently with the ureter due to excessive exercise during the vulnerable period after surgery, reduce the physical harm after surgery, and promote the patient's rapid recovery.

[0092] The function of the exercise reminder threshold with respect to the duration after surgery has the following specific expression:

[0093] ;

[0094] where: are all preset weight coefficients, and (in a specific embodiment are 0.2 and 0.8 respectively);

[0095] is a preset normal exercise threshold;

[0096] is a preset time growth coefficient (taking the value of 0.2 in a specific embodiment);

[0097] is a preset time convergence coefficient (taking the value of 0.15 in a specific embodiment);

[0098] It should be noted that generally, the postoperative recovery is divided into several stages: in the initial stage (such as the first week), the patient needs to strictly restrict activities to avoid wound tearing or internal bleeding; in the middle stage (the second to the fourth week), the activity amount is gradually increased to promote recovery; in the later stage (after four weeks), it approaches the normal activity level. The function of the exercise reminder threshold with respect to the duration after surgery divides the calculation of the exercise reminder threshold into three stages through a piecewise function, corresponding to the acute, subacute, and stable stages of postoperative recovery respectively, and the calculation formula corresponding to each stage conforms to the physical recovery effect of the corresponding period;

[0099] The function of the exercise reminder threshold with respect to the duration after surgery is used to dynamically adjust the exercise reminder threshold. Because during the actual application process, the patient's physical condition will slowly recover after surgery. As the body recovers and adapts to the stent tube, the amount of exercise can be appropriately increased to promote further physical recovery. In this case, it is necessary to dynamically adjust the exercise reminder threshold to make the generation of exercise reminder signals more user-friendly and avoid the frequent generation of exercise reminder signals, which may cause the patient to resist normal exercise rehabilitation behaviors;

[0100] Step 3: Obtain the pressure value measured by the pressure sensor and record it as the waist pressure value. Denote the waist pressure values on the upper and lower sides as , where j is the serial number of the waist pressure value. Divide the waist pressure values into four pressure sets, and the four pressure sets respectively correspond to the waist pressures in the front, back, left, and right directions of the waist. Divide the pressure sets into two relative set groups, and the pressure sensors corresponding to the two pressure sets in the relative set group are relatively arranged;

[0101] Analyze each pressure set:

[0102] Let the pressure set be , where i is the serial number of the waist pressure value in the pressure set. Substitute it into the formula for calculation to obtain the pressure difference , where u is the number of elements in the pressure set. There is a preset pressure difference threshold. When the pressure difference is greater than the pressure difference threshold, record this pressure set as the bending set;

[0103] It should be noted that the determination condition of the bending set is that the pressure difference between the upper and lower sides of the patient's waist exceeds the preset threshold, and this situation usually means that the bending amplitude of the patient's waist exceeds the specified angle. Therefore, the bending set can be used to judge whether the user is bending over.

[0104] Step 4: Obtain the vector sum of the three-axis acceleration and record it as the motion vector. Denote the modulus of the motion vector as the motion reference value, and there is a preset motion reference threshold;

[0105] When the motion reference value is less than the motion reference threshold, obtain the number of bending sets in the two relative set groups. When the number of bending sets in any one of the relative set groups is equal to 2, generate a bending reminder signal to remind the user to avoid excessive bending;

[0106] When the motion reference value is greater than or equal to the motion reference threshold, obtain the current motion alarm value. There is a preset exercise reminder threshold. When the motion alarm value is greater than or equal to the exercise reminder threshold, generate an exercise over-signal to remind the user to reduce the current exercise amplitude.

[0107] It should be noted that by generating different signals to remind the user to pay attention to postoperative recovery care, on the one hand, it can reduce the abnormal movement amplitude, prevent potential injuries caused by excessive movement or excessive bending, and avoid physical damage caused by the detachment or movement of the end of the stent tube. On the other hand, it can provide targeted reminders according to the user's behavior, thus realizing the monitoring and reminder of the user's movement posture and amplitude during the nursing process, effectively balancing the movement safety and activity freedom.

[0108] It also includes Step Five:

[0109] Preset the triaxial offset angle corresponding to the upright state of the intelligent belt (when the patient's waist is vertical) as the upright offset angle. When the triaxial offset angle is equal to the upright offset angle, mark the patient as in the upright state. When the patient is in the upright state and the integral of the triaxial acceleration over time within the preset sitting duration threshold range is less than the preset sitting threshold, generate a sedentary reminder signal to remind the patient to get up and move;

[0110] Preset a drinking cycle, and generate a drinking reminder every interval of the drinking cycle to remind the patient to replenish water.

[0111] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent monitoring and reminder method for postoperative care of renal and ureteral stone lithotripsy, characterized in that: The following steps are involved: Step 1: Analyze the patient's postoperative abdominal images, construct a positioning coordinate system and mark the contours of the pelvis and stent tube. Determine the size of the smart belt based on the relative positions of the pelvic contour and the stent tube contour. Obtain the triaxial acceleration and waist contact pressure of the patient when wearing the smart belt. Step 2: Based on the three-axis acceleration and the gyroscope set inside the smart belt, the real-time vertical acceleration is obtained, and the vertical acceleration is calibrated with the gravity acceleration to obtain the acceleration display value; A unit analysis duration is preset, and the acceleration display value change curve within the recent multiple unit analysis intervals is analyzed to obtain the motion alarm value; Step 3: Obtain pressure values ​​at multiple locations around the waist and record them as waist pressure values. The waist pressure values ​​are divided into upper and lower rows. The waist pressure values ​​are divided into four pressure sets according to the four directions of the waist, and the relative pressure sets are divided into a relative set group. A pressure difference value is obtained based on the waist pressure value in each pressure set, and the pressure difference value is compared with a preset pressure difference threshold value to determine a bending set; Step 4: Analyze the number of bending sets in the relative set group and generate a bending reminder signal; The motion alarm value is compared with the motion reminder threshold to generate an excessive motion signal.

2. The intelligent monitoring and reminder method for postoperative care of ureteral calculi lithotripsy according to claim 1 is characterized in that: The smart belt size determination process is as follows: Construct two straight lines that are tangent to the edges of the pelvic contour on both sides and parallel to the longitudinal axis as edge straight lines, and record the tangent point of the edge straight line and the pelvic contour as the first positioning point; Mark the end points of the stent tube on the stent tube outline as edge points, obtain the ordinates of each edge point, and record the edge point with the largest ordinate as the second positioning point; Construct a line between the two first positioning points as a pelvic reference line, draw a straight line parallel to the longitudinal axis through the second positioning point as a stent tube reference line, record the intersection of the stent tube reference line and the pelvic reference line as a third positioning point, calculate the distance between the second positioning point and the third positioning point and multiply it by a preset distance ratio to obtain a relative distance; There are multiple preset wearing sizes, and the wearing size closest to the relative distance is selected as the target size.

3. The intelligent monitoring and reminder method for postoperative care of renal and ureteral calculi lithotripsy according to claim 1 is characterized in that: The vertical acceleration acquisition process is as follows: Let the three axes of the three-axis accelerometer coincide with the three axes of the reference space coordinate system respectively, and record the three-axis acceleration as They correspond to the x-axis, y-axis and z-axis of the reference space coordinate system respectively, so that the roll axis, yaw axis and pitch axis of the gyroscope correspond to the x-axis, y-axis and z-axis of the reference space coordinate system respectively; A real-time space coordinate system is constructed based on the directions of the current gyroscope's roll, yaw and pitch axes, and the offset angles of the gyroscope's three axes compared to the three axes of the reference space coordinate system are obtained and recorded as the three-axis offset angles. Based on the three-axis offset angles, a three-axis acceleration vector is drawn in the real-time space coordinate system, and the projection length of the three-axis acceleration vector on the z-axis of the real-time space coordinate system is obtained and recorded as the vertical acceleration.

4. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral calculi lithotripsy according to claim 3 is characterized in that: The vertical acceleration calibration process is as follows: Obtain the gravitational acceleration as g, and use the gravitational acceleration to calibrate the vertical acceleration display. Calculate the acceleration display value ,in is the measured value of vertical acceleration.

5. The intelligent monitoring and reminder method for postoperative care of ureteral calculi lithotripsy according to claim 1, characterized in that: The independent analysis process of the unit analysis interval is as follows: Let the current time be , construct m unit analysis intervals , n=1,2,3,…m, m is a preset constant value; The area of ​​the closed figure enclosed by the acceleration display value change line and the time axis is obtained and recorded as the total value of acceleration change, and the number of intersections between the vertical acceleration display value and the time axis is obtained and recorded as the number of changes; Combined with the gravity acceleration analysis, the duration of hovering is obtained; The step frequency reference value is obtained based on the peak analysis of the acceleration display value curve; The total acceleration change, number of changes, air time and step frequency reference value corresponding to each unit analysis interval are recorded as , get the time difference between the current time and the operation completion time as the postoperative time ; Substituting into the formula: Calculate the motion alarm value ,in: It is the motion reminder threshold; represents the function of the movement reminder threshold with respect to the duration of surgery; is the preset weight coefficient; is the preset acceleration change threshold.

6. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral calculi lithotripsy according to claim 5, characterized in that: The analysis process of hovering time is as follows: Based on the gravity acceleration, a gravity acceleration range interval [-gd, -g] is constructed, where d is the preset fluctuation range value. Two straight lines corresponding to the endpoints of the gravity acceleration range interval are drawn in the acceleration display value change line graph. The part of the acceleration display value change line that is within the gravity acceleration range interval is recorded as the suspended part. The projection length of the suspended part on the time axis is obtained and recorded as the suspended duration.

7. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral calculi lithotripsy according to claim 5, characterized in that: The analysis process of the cadence reference value is as follows: An acceleration peak is preset, and a straight line corresponding to the acceleration peak is drawn. The closed figure of the part where the acceleration display value change line is above the straight line corresponding to the acceleration peak is recorded as a peak figure. The projection length of each peak figure on the time axis is obtained and recorded as the peak duration. A peak duration threshold is preset, and the peak figure with a peak duration greater than or equal to the peak duration threshold is recorded as a cadence judgment figure. The number of cadence judgment figures obtained is recorded as the cadence reference value.

8. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral calculi lithotripsy according to claim 5, characterized in that: Movement reminder threshold as a function of postoperative time The specific expression is: ； in: are all preset weight coefficients, and ; is the preset normal motion threshold; is the preset time growth coefficient; is the preset time convergence coefficient.

9. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral calculi lithotripsy according to claim 1, characterized in that: The bending set determination process is as follows: The waist pressure values ​​on the upper and lower sides are recorded as , where j is the serial number of the waist pressure value; Assume the pressure set is , i is the serial number of the waist pressure value in the pressure set, substitute into the formula Calculate the pressure difference , where u is the number of elements in the pressure set, and a pressure difference threshold is preset. When the pressure difference is greater than the pressure difference threshold, the pressure set is recorded as a bending set.

10. The intelligent monitoring and reminder method for postoperative care of kidney and ureteral stone lithotripsy according to claim 1, characterized in that: The signal generation process is as follows: The vector sum of the three-axis acceleration is obtained and recorded as a motion vector, and the modulus of the motion vector is recorded as a motion reference value, and a motion reference threshold is preset; When the motion reference value is less than the motion reference threshold, the number of bending sets in the two relative set groups is obtained, and when the number of bending sets in any relative set group is equal to 2, a bending reminder signal is generated; When the motion reference value is greater than or equal to the motion reference threshold, the current motion alarm value is obtained. A motion reminder threshold is preset. When the motion alarm value is greater than or equal to the motion reminder threshold, an excessive motion signal is generated.

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