Portable tissue blood flow perfusion monitor based on abdominal impedance spectral parameters

Abstract

The invention discloses a portable tissue blood flow perfusion monitor based on abdominal impedance spectral parameters, comprising a master control module, a programmable constant-current source, animpedance electrode array, a wide-band abdominal impedance spectral data acquisition circuit, an AD (analog / digital) converter, a buffer unit, a control panel, a display screen and a battery power supply module; when powered by the battery power supply module, the master control module controls the programmable constant-current source to output an excitation current signal of required frequency point, which is applied to the human abdomen through exciting electrodes in an impedance electrode array; the wide-band abdominal impedance spectral data acquisition circuit transmits analog values of real parts and imaginary parts of impedances corresponding to exciting frequencies to the AD converter to carry out digital-analog conversion; the converted data of real parts and imaginary parts of the impedances are transmitted to the buffer unit; the master control module calculates a tissue blood flow perfusion value through a tissue blood flow perfusion real-time dynamic estimation procedure,and the tissue blood flow perfusion value is displayed through a display. The portable tissue blood flow perfusion monitor based on abdominal impedance spectral parameters is suitable for providing real-time dynamic monitoring for tissue blood flow perfusion of prehospital shocked patients.

Description

technical field [0001] The invention belongs to the field of pre-hospital emergency anti-shock technology, and in particular relates to a portable tissue blood perfusion monitor based on abdominal electrical impedance spectrum parameters. Background technique [0002] The early mortality rate of hemorrhagic shock is as high as 40%-50%, and the cause of death of patients is often multiple organ dysfunction syndrome caused by tissue hypoperfusion and other factors. Clinically, the improvement of consciousness, the increase of blood pressure, the decrease of heart rate and the increase of urine output are often used as the criteria for judging the resuscitation effect of hemorrhagic shock. However, as high as 50%-85% of patients with hemorrhagic shock are still in a state of tissue hypoperfusion after reaching the above resuscitation goals. The persistence of this state is the key factor leading to the death of patients, and tissue blood perfusion has become a key indicator for...

AI Technical Summary

Problems solved by technology

[0003]At present, the equipment that can be used for tissue blood perfusion monitoring in the hospital, such as CT perfusion imaging, laser Doppler blood flow meter and ultrasound Doppler blood flow meter, is equivalent to volume Large, high power consumption, and cannot be used in front of the hospital

The tissue blood perfusion monitoring technologies in the research include near-infrared spectroscopy, diffusion correlation spectroscopy, diffuse reflectance spectroscopy, and laser speckle imaging. Laser direct measurement and indirect monitoring and comparison of other parameters can evaluate tissue blood perfusion (such as CN 109124616A), which is not suitable for rapid assessment of tissue blood perfusion in shock patients in harsh pre-hospital environments

Images