Optical non-invasive detection method of mixed venous oxygen saturation

Abstract

The invention discloses an optical non-invasive detection method of mixed venous oxygen saturation. The optical non-invasive detection method comprises the following steps: light intensity signals are obtained through transmitting devices with different wavelengths and receiving devices at corresponding parts, then absorption coefficients are obtained by an improved beer-lambert law, after a series of treatments such as fast Fourier transform of the absorption coefficients, the mixed venous oxygen saturation is finally calculated out, the mixed venous oxygen saturation is monitored in a real-time, non-invasive and non-intrusive manner, and the method can be used for monitoring conditions such as physiological change of a shock patient. The method is reliable, high in flexibility, simple to operate, and favorable for popularization and application. The invention puts forward a non-invasive venous oxygen saturation measurement method for the first time, and the non-invasive venous oxygen saturation measurement method has the advantages of being high in safety, high in measurement precision and the like by adopting an optical technology.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an optical noninvasive method for detecting mixed venous oxygen saturation. Background technique [0002] Mixed venous oxygen saturation can accurately reflect the balance of systemic oxygen supply and demand, and is an indirect indicator of tissue oxygenation. After cardiovascular surgery, if SvO occurs in patients with severe cardiopulmonary disease, septic shock or cardiogenic shock 2 A decrease indicates a poor prognosis. Therefore monitoring SvO 2 It is of great significance to guide the treatment and judge the prognosis of critically ill patients. [0003] Central venous oxygen saturation (ScvO 2 ) It can quickly reflect the instantaneous changes in the supply and demand balance of systemic oxygen in critically ill patients, and can detect tissue hypoxia early, and is superior to other traditional hemodynamic parameters. An important index to evalua...

AI Technical Summary

Problems solved by technology

[0007] Numerous studies have shown that the use of pulmonary artery catheters to monitor venous oxygen saturation does not improve survival or shorten hospital stays in critically ill patients, but only increases complications

On the one hand, it increases the workload of medical staff, and on the other hand, it increases the burden of healing for patients

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