6 results about "Peripheral resistance" patented technology

The invention belongs to the technical field of ultrasonic monitoring, and discloses a Doppler ultrasonic monitoring method and device for intracranial pressure, and the method comprises the steps: employing an ultrahigh frequency Doppler ultrasonic probe to measure the pulse wave of a neck artery; by analyzing the pulse wave map, pulse wave peripheral resistance parameters closely related to intracranial pressure are extracted; the quantitative relation between the pulse wave parameters and the intracranial pressure is obtained through comparison with the peripheral resistance parameters under the real intracranial pressure condition; 24-hour intracranial pressure monitoring of a patient is realized by continuously acquiring the pulse wave parameters of the neck artery. The technology provided by the invention is used for monitoring the intracranial pressure and also can give an alarm to the occurrence of cerebral apoplexy. The device designed by the invention is small in size, light in weight and convenient to wear, does not influence the living of a patient, and can really realize 24-hour noninvasive monitoring of the intracranial pressure.

The application provides a hemodynamic parameter estimation method and device based on a non-invasive blood pressure waveform, equipment and a medium, which can be applied to the technical field of medical information processing. The method comprises the following steps: obtaining a non-invasive continuous arterial blood pressure waveform and individual information of a target object; preprocessing the non-invasive continuous arterial blood pressure waveform to construct a standardized single cardiac cycle blood pressure waveform; inputting the standardized single cardiac cycle blood pressure waveform and the individual information into a pre-trained hemodynamic estimation model to obtain an estimation result comprising at least cardiac output and stroke volume; wherein the hemodynamic estimation model comprises a deep neural network module, and the hemodynamic estimation model is trained by constraining the output result predicted by the deep neural network module in a physiological relationship described by a three-element Windkessel model comprising arterial compliance, peripheral resistance and characteristic impedance.

The invention relates to the technical field of blood pressure monitoring, and discloses a continuous blood pressure monitoring method and system based on an elastic cavity model and a pulse wave velocity equation, a terminal and a storage medium, and the method comprises the following steps: reflecting a dynamic process among cardiac ejection, artery compliance and peripheral resistance from a system level by using a two-element elastic cavity model; a time domain coupling relationship between blood pressure and blood flow is established, and a pulse wave velocity equation is introduced to calculate artery compliance C parameters of different objects so as to calibrate model compliance C parameters, so that a targeted blood pressure monitoring result is obtained. Individualized physiological information is introduced, and the accuracy and interpretability of blood pressure prediction on different objects are improved.

The application relates to the technical field of blood pressure monitoring, and discloses a continuous blood pressure monitoring method and system based on an elastic cavity model and a pulse wave velocity equation, a terminal and a storage medium, the method comprising the following steps: utilizing a two-element elastic cavity model to reflect the dynamic process among cardiac ejection, arterial compliance and peripheral resistance from a system level, establishing a time-domain coupling relationship between blood pressure and blood flow, and introducing a pulse wave velocity equation to calculate the arterial compliance C parameter of different objects, calibrate the model compliance C parameter, and obtain targeted blood pressure monitoring results. The application introduces individual physiological information, and improves the accuracy and interpretability of blood pressure prediction for different objects.

The invention belongs to the technical field of ultrasonic monitoring, and discloses a Doppler ultrasonic monitoring method and device for intracranial pressure, and the method comprises the steps: employing an ultrahigh frequency Doppler ultrasonic probe to measure the pulse wave of a neck artery; by analyzing the pulse wave map, pulse wave peripheral resistance parameters closely related to intracranial pressure are extracted; the quantitative relation between the pulse wave parameters and the intracranial pressure is obtained through comparison with the peripheral resistance parameters under the real intracranial pressure condition; 24-hour intracranial pressure monitoring of a patient is realized by continuously acquiring the pulse wave parameters of the neck artery. The technology provided by the invention is used for monitoring the intracranial pressure and also can give an alarm to the occurrence of cerebral apoplexy. The device designed by the invention is small in size, light in weight and convenient to wear, does not influence the living of a patient, and can really realize 24-hour noninvasive monitoring of the intracranial pressure.

A system and a method for applying a gradient of external compressive forces on the body of a person, in a manner analogous to how water exerts hydrostatic forces on the body of person immersed in water. The system may be a chair or a suit, comprising at least one of the following: one compression unit holding fluid around the person to exert a gradient of hydrostatic forces, at least one rigid or semi-rigid frame or a shell supporting the body and the compression units to support the pressure and off-loaded weight of the person and transfer the weight to an external support such as floor. Additionally, the system may contain additional means to reduce the frictional forces on the body surface and between various moving parts, and a means to modify pressure on the body of the person. The system and method is applicable for effecting physiological changes in the body such as increased diuresis and / or amniotic fluid levels, treat preeclampsia in pregnant women, reduce hypertension, shift fluids from interstitial space into intravascular compartment, increase venous return from lower extremities, reduce sympathetic tone and total peripheral resistance, reduce work load on the heart, reduce motion sickness and the like.