5 results about "Free blood" patented technology

A system for measurement of non-invasive and calibration-free blood pressure (BP) is disclosed. The system comprises a measurement probe (302) which is in contact with a person's skin. The measurement probe (302) comprises a first array of sensors (302-1) and a second array of sensors (302-2). The first array of sensors (302-1) determines a force exerted on skin (304) and the second array of sensors (302-2) determines a compression-decompression characteristics of the arteries through skin. The force exerted on skin and the compression-decompression characteristics of the arteries are used to determine indices indicative of the material properties of the vessel. Based on the indices indicative of the material properties of the vessel, blood pressure and continuous transmural pressure waveform may be determined.

The embodiment of the application provides a kind of key and electronic equipment, belong to electronic technical field, the second shell of key can be pressed and move and rotate, when pressing second shell, elastic deformation piece occurs elastic deformation by second shell.Electronic device can be detected elastic deformation variable, obtain the first pressing force information on second shell, realize the quantitative detection of first pressing force.Using first pressing force information can meet the specific application scenario requirement of electronic device, such as in pressing, the physiological parameter information of pressing part can be detected, the physiological parameter information is the physiological parameter information of pressing part under extrusion force scene, combined with the physiological parameter information and first pressing force information, more accurate biological characteristic information can be obtained, and the accuracy of biological feature detection is improved.No need to additionally increase pressure device, high-precision biological feature detection can be realized, such as high-precision wristband-free blood pressure detection, which is beneficial to the miniaturization and convenience design of electronic device.

The invention discloses a cuff-free blood pressure estimation method and device based on wearable equipment. The cuff-free blood pressure estimation method comprises the steps that PPG data and ECG data collected by the wearable equipment of a user are obtained; the PPG data and the ECG data are preprocessed; dividing according to a preset window length based on the preprocessed PPG data and the filtered ECG data to obtain a plurality of time slices; performing multi-layer wavelet decomposition on each time slice and performing wavelet statistical feature extraction to obtain statistical features; and combining the statistical features with user sign data to construct feature vectors, and inputting the feature vectors into a lightweight multi-resolution neural network model to output systolic pressure and diastolic pressure data of corresponding time slices, thereby obtaining a continuous blood pressure estimation result of the user. By means of the technical scheme, real-time estimation of systolic pressure and diastolic pressure is achieved under the condition that the end side calculation force is limited.

The invention provides a blood pressure monitoring method and device for a target user, electronic equipment, a medium and a product, and relates to the technical field of blood pressure monitoring. The method comprises the steps that a photoplethysmography signal set of the target user is obtained based on at least two photoplethysmography sensors; the photoplethysmography signal set comprises photoplethysmography signals correspondingly acquired by every two photoplethysmography sensors; determining a waveform feature point set according to each photoplethysmography signal in the photoplethysmography signal set; determining the pulse wave velocity of the target user according to the waveform feature point set; acquiring static physiological parameters of the target user; determining a blood pressure monitoring result of the target user according to the pulse wave speed and the static physiological parameters. According to the technical scheme, the pulse wave speed is determined through the at least two photoplethysmography sensors, the blood pressure monitoring result is determined based on the pulse wave speed and the static physiological parameters, and non-invasive, cuff-free and electrocardiogram-free blood pressure dynamic monitoring is achieved.

The utility model relates to the technical field of blood collection bag transportation, in particular to a temporary transportation tool for a blood collection bag for no-payment blood donation, which comprises a box body, a box cover is arranged at the top of the box body, a refrigeration shell is arranged at the bottom of the box body, and supporting legs are arranged at four corners of the bottom of the refrigeration shell. The bottom of the inner side of the box body is provided with a cold penetration groove hole, the bottom of the inner side of the refrigeration shell is provided with a cooling fan, a semiconductor refrigeration sheet is arranged on the inner side of the refrigeration shell and located above the cooling fan, and the inner side wall of the box body is provided with a temperature sensor. A blood collection bag is independently placed at the position between the two sets of concave clamping plates, then the corresponding two-way air cylinders are started to drive the concave clamping plates to move in the same direction to clamp the blood collection bag, and the blood collection bag can be independently fixed under the cooperation of the auxiliary telescopic rods, so that the stability is improved; and the buffering pads on the two sides can also reduce impact force generated by shaking.