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CN-121971063-A - Dynamic early warning method for myocardial infarction and cerebral infarction individuation trend of intelligent ring PPG signal

CN121971063ACN 121971063 ACN121971063 ACN 121971063ACN-121971063-A

Abstract

The application discloses a dynamic early warning method for the individuation trend of myocardial infarction and cerebral infarction of an intelligent ring PPG signal, and particularly relates to the technical field of wearable medical equipment, comprising a main ring module, a hand clamp ring main body, a reinforced monitoring ring main body and a medicine injection ring main body; the main ring module comprises a first ring main body, one end of the first ring main body is provided with an adjustable contact assembly, the other end of the first ring main body is provided with a butting inner ring, the center of the butting inner ring is reserved with a ring inner ring, and the main ring module is respectively clamped with the ring main body through the butting inner ring. Real-time detection and closed-loop adjustment of wearing fitness are realized through the adjustable contact assembly, a fitness coefficient calculation model is constructed through a piecewise function, the contact fitting state is quantized, the finger circumference difference and wearing state change of different wearers are dynamically adapted, the problems of poor adaptability of the fixed contact and large fluctuation of signal to noise ratio are solved, and the PPG signal quality of long-term continuous monitoring is ensured.

Inventors

  • WEI LIANGFENG
  • WEI WENBIN
  • XU YIZHONG

Assignees

  • 福建中科星泰数据科技有限公司

Dates

Publication Date
20260505
Application Date
20260317

Claims (10)

  1. 1. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction individuation trend dynamic early warning method is characterized by comprising the following steps of: s1, after an intelligent ring is electrified, identifying the type of an expansion module which is currently accessed, and automatically matching an early warning model and a signal processing strategy which are combined with the current module and correspond to a wearing scene; S2, collecting multi-position fingertip contact pressure through an adjustable contact assembly (10) of a main ring module (1), calculating single contact fitting degree and integral fitting degree coefficients based on a piecewise function model, adjusting collecting parameters of PPG signals in a closed loop mode according to the fitting degree coefficients, and continuously collecting original PPG signals of fingertips; S3, preprocessing the collected original PPG signal, extracting a core early warning characteristic value related to myocardial infarction and cerebral infarction, and establishing and dynamically updating an exclusive individual dynamic physiological baseline of the wearer through a Gaussian weighted sliding window based on historical physiological data of the wearer; s4, calculating the standardized offset of the current core early warning characteristic value and the personalized dynamic physiological baseline in real time, monitoring the continuous offset trend of the characteristic value based on a cumulative and control diagram CUSUM algorithm, and outputting low-risk, medium-risk and high-risk three-level risk early warning results; And S5, according to the type of the accessed expansion module, corresponding signal calibration, multi-source fusion risk stratification or emergency medicine closed-loop intervention operation is executed, and the whole-flow closed-loop of early warning and intervention is completed.
  2. 2. The dynamic early warning method for the individuation trend of the myocardial infarction and cerebral infarction of the intelligent ring PPG signal according to claim 1, wherein in the step S2, the calculation method of the integral fitting degree coefficient is specifically that a common one is arranged A contact main body (1401), a first The contact pressure collected by each contact is Presetting the optimal contact pressure as The effective contact pressure interval is Wherein Is the midpoint of the active contact pressure interval. First define single contact fitting degree ; (1); On the basis, the integral fitting degree coefficient is calculated ; (2); Wherein, the The range of the values is as follows The closer the value is to 1, the better the overall fit.
  3. 3. The intelligent finger ring PPG signal dynamic early warning method for myocardial infarction and cerebral infarction individuation trend according to claim 1, wherein in S3, the establishment method of the individuation dynamic physiological baseline is specifically as follows: extracting core early warning characteristic values related to myocardial infarction and cerebral infarction from the preprocessed PPG signals, and marking the core early warning characteristic values as Wherein For the characteristic sequence number, Is the sampling time point; first, an individualized dynamic physiological baseline calculation is performed: establishing a baseline by adopting a Gaussian weighted sliding window, wherein the length of the sliding window is as follows The sampling time point in the window is The current time is ; First calculate each time point Gaussian weight of (c) ; (3) Wherein, the method comprises the steps of, The Gaussian kernel bandwidth is used for adjusting the weight attenuation rate of the historical data, and the weight is larger as the sampling data is closer to the current time, so that the baseline can adapt to the dynamic change of the physiological state of the individual; On the basis, calculate the first Personalized dynamic baselines for individual feature values ; (4)。
  4. 4. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction personalized trend dynamic early warning method according to claim 1, wherein in S4, the trend early warning method based on the CUSUM algorithm specifically comprises: calculating normalized offset Eliminating the dimension difference of different eigenvalues: (5); Wherein, the Is the characteristic value The standard deviation within the sliding window is used, The greater the absolute value of (c), the more severe the degree of deviation of the representative feature value from the baseline; A simplified accumulation and control graph (CUSUM) algorithm is adopted to monitor the continuous deviation trend of the characteristic values and capture early tiny anomalies before the occurrence of myocardial infarction and cerebral infarction, and the formula is as follows: (6); Wherein, the For the last point in time of the sampling, The sensitivity threshold value is used for adjusting the sensitivity of trend detection; for forward cumulative sums, the trend of the monitored feature value continuously higher than the baseline, For negative cumulative sum, the trend of the characteristic value continuously lower than the base line is monitored, and the initial value is obtained ; Setting an early warning threshold Duration threshold The decision rule is as follows: When (when) And is also provided with When the risk is low, judging that the risk is low; Judging the risk as medium risk; When (when) And duration of time And judging that the risk is high.
  5. 5. The method for dynamically pre-warning the individuation trend of the myocardial infarction and cerebral infarction of the intelligent ring PPG signal according to claim 1 is characterized in that in the step S5, if an accessed expansion module is a hand-clamped ring main body (20), standard PPG signal acquisition and self-adaptive filtering differential calibration operation is executed, if the accessed expansion module is a reinforced monitoring ring main body (32), multi-source data fusion is executed, fusion risk probability is calculated through a logistic regression model, thinning risk layering and pre-warning etiology tracing are executed, if the accessed expansion module is a medicine injection ring main body (35), three-level safety verification is executed after receiving a high-risk pre-warning signal, and individuation first-aid medicine infusion is triggered after verification passes.
  6. 6. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction personalized trend dynamic early warning method according to claim 5 is characterized in that the fusion risk probability calculation model is that the fusion risk probability is The value range is The closer the value is to 1, the higher the risk of onset; (7); Wherein, the As a constant term of the model, For the number of PPG core features, As regression coefficients for the PPG core feature offset, To further normalize the characteristic values of the physiological parameter, For the number of advanced physiological parameters, For regression coefficients of advanced physiological parameters, all coefficients are pre-trained through a clinical dataset and can be fine-tuned according to the individual medical history of the wearer.
  7. 7. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction individuation trend dynamic early warning method is characterized in that three-level safety verification sequentially comprises high-risk early warning verification, verification of duration and deviation degree of an early warning signal, elimination of false alarm, biological feature verification of a wearer, extraction of pulse wave features through the PPG signal, verification of identity of the wearer, manual verification, sending of a verification request to the wearer or an emergency contact person, verification after receiving a verification command within a preset time, and triggering a drug injection pump (39) to execute individuation emergency drug infusion after all three-level verification is passed, and the whole infusion flow state is monitored in real time.
  8. 8. The intelligent ring PPG signal myocardial infarction and cerebral infarction individualized trend dynamic early warning device is characterized by comprising a main ring module (1), a hand clamp ring main body (20), a reinforced monitoring ring main body (32) and a medicine injection ring main body (35), wherein the main ring module (1) comprises a first ring main body (2), one end of the first ring main body (2) is provided with an adjustable contact assembly (10), the other end of the first ring main body (2) is provided with a butt joint inner ring (4), a ring inner ring (3) is reserved at the center of the butt joint inner ring (4), and the main ring module (1) is connected with the hand clamp ring main body (20), the reinforced monitoring ring main body (32) and the medicine injection ring main body (35) in a pluggable clamping manner through the butt joint inner ring (4), and a first control unit (18) is arranged in the main ring module (1).
  9. 9. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction individualized trend dynamic early warning device according to claim 8 is characterized in that the adjustable contact assembly (10) comprises an adjusting ring (11), one end of the adjusting ring (11) is rotatably connected with a first rotating disc (12), one end of the adjusting ring (11) far away from the first rotating disc (12) is provided with a second rotating disc (13), the outer diameter surface of the first rotating disc (12) is provided with teeth, movable contact strips (14) are arranged in the adjusting ring (11) at equal intervals along the circle center, the outer surface of the movable contact strips (14) is provided with a contact main body (1401), the top end of the first rotating disc (12) is connected with a rotating gear ring (1201) in a meshed mode, and the contact main body (1401) is electrically connected with a first core sensing unit (16) arranged in a main ring module (1); Positioning grooves (5) are formed in one side of the butt joint inner ring (4), limiting sliding grooves (6) are formed in the center of the inner wall of the butt joint inner ring (4), a plurality of forward magnets (7) are fixedly connected to one side of each limiting sliding groove (6), inserting grooves (8) are formed in one side of each forward magnet (7), the forward magnets (7) and the inserting grooves (8) are arrayed in the same distance along the circle center, alarm lamps (9) are arranged on the outer surface of the first ring body (2), and a first flexible circuit board (15) is arranged inside the first ring body (2).
  10. 10. The intelligent finger ring PPG signal myocardial infarction and cerebral infarction individualized trend dynamic early warning device according to claim 8 is characterized in that a hand clamp main body (21) is arranged on the side edge of the hand clamp ring main body (20), a clamping groove (23) is formed in the clamping end of the hand clamp main body (21), a first butt joint ring (22) is arranged at one end, far away from the hand clamp main body (21), of the hand clamp ring main body (20), a second flexible circuit board (28) is arranged in the hand clamp ring main body (20), a forward magnetic cavity (24) is arranged on the outer surface of the first butt joint ring (22), clamping blocks (25) are arranged on the side edge of the forward magnetic cavity (24), the forward magnetic cavity (24) and the clamping blocks (25) are arrayed at equal intervals along the circle center, an external connection slot (26) is formed in the inner portion of the first butt joint ring (22), and a bulge (27) is arranged on the inner wall of the external connection slot (26); one end of the reinforced monitoring ring main body (32) is fixedly connected with a multi-connection plug-in ring (33), one end of the reinforced monitoring ring main body (32) far away from the multi-connection plug-in ring (33) is fixedly connected with a second butt joint ring (34), and a third flexible circuit board (43) is arranged in the reinforced monitoring ring main body (32); the medicine injection ring is characterized in that a medicine injection port (36) is formed in the upper portion of the inner wall of the medicine injection ring main body (35), a medicine injection head (37) is arranged in the medicine injection port (36), a medicine injection pipe (38) is communicated with the medicine injection head (37), a medicine injection pump (39) is connected with the tail end of the medicine injection pipe (38), and a fourth flexible circuit board (40) is arranged in the medicine injection ring main body (35).

Description

Dynamic early warning method for myocardial infarction and cerebral infarction individuation trend of intelligent ring PPG signal Technical Field The application relates to the technical field of wearable medical equipment, in particular to a dynamic early warning method for an individualized trend of myocardial infarction and cerebral infarction of an intelligent ring PPG signal. Background In recent years, the incidence rate of acute myocardial infarction and ischemic cerebral apoplexy (cerebral infarction) is increased year by year, and the heart infarction and cerebral infarction have the characteristics of high emergency and death disability rate, clinical data show that the peripheral circulation physiological signals of patients are changed characteristically within a few hours to a few days before the occurrence of the myocardial infarction and cerebral infarction, and the photoelectric volume pulse wave (PPG) signals can collect fingertip blood flow perfusion information noninvasively and continuously, can extract physiological characteristics related to the occurrence of the myocardial infarction and cerebral infarction from the fingertip blood flow perfusion information, and are a core technical path for realizing early warning at home; the prior publication number CN118315071B discloses a monitoring method and a system for an intelligent ring based on PPG physiological index monitoring, which relate to the technical field of health management, and the prior intelligent ring monitoring scheme has the defects of poor suitability of fixed contacts, high false alarm rate of a general threshold value, single function and the like. The inventors found that the following problems exist in the prior art in the process of implementing the present application: In the prior art, most of sensing contacts of the existing ring wearable equipment are of fixed structures, so that the sensing contacts cannot adapt to the finger circumference difference of different wearers, the wearing fit degree is unstable, the fluctuation of the signal-to-noise ratio of PPG signals is large, the motion artifact interference is serious, and the precision requirement of long-term continuous monitoring cannot be met; most of early warning schemes adopt general fixed threshold values or crowd general models, physiological baseline differences of different individuals are not considered, dynamic changes of individual physiological states cannot be adapted, so that false alarm rate and false alarm rate are high, early personalized trend early warning of myocardial infarction and cerebral infarction cannot be realized; therefore, the dynamic early warning method of the myocardial infarction and cerebral infarction individuation trend of the intelligent ring PPG signal is provided for the problems. Disclosure of Invention In order to overcome the defects in the prior art, the application provides a dynamic early warning method for the individuation trend of myocardial infarction and cerebral infarction of an intelligent ring PPG signal, which aims to solve the problems in the background art. The intelligent ring PPG signal myocardial infarction and cerebral infarction individualized trend dynamic early warning method comprises a main ring module, a hand clamp ring main body, a reinforced monitoring ring main body and a medicine injection ring main body, wherein the main ring module comprises a first ring main body, one end of the first ring main body is provided with an adjustable contact assembly, the other end of the first ring main body is provided with a butting inner ring, and a ring inner ring is reserved at the center of the butting inner ring; The main ring module is internally provided with a first control unit, the first control unit is configured to identify the type of an expansion module which is currently connected with the butt joint inner ring in a clamping mode, automatically match an early warning model and a signal processing strategy which are corresponding to the current module, collect fingertip contact pressure through an adjustable contact assembly, calculate a contact degree coefficient, dynamically adjust collection parameters of PPG signals according to the contact degree coefficient, continuously collect fingertip PPG signals, extract core characteristic values related to myocardial infarction and cerebral infarction, establish and dynamically update an individualized dynamic physiological baseline of a wearer, and output low-risk, medium-risk and high-risk three-level risk early warning results based on the continuous deviation trend of the core characteristic values and the individualized dynamic physiological baseline. Preferably, the adjustable contact assembly comprises an adjusting ring, one end of the adjusting ring is rotationally connected with a first rotating disc, one end of the adjusting ring, far away from the first rotating disc, is provided with a second rotating disc, the outer diameter su