Pulmonary artery blood oxygen saturation monitoring device based on optical fiber sensor

Abstract

A pulmonary artery blood oxygen saturation monitoring device based on an optical fiber sensor is disclosed, wherein an input end of a driving circuit is connected with a computer, and the output end of the same is connected with two LED light sources, light signal is incident into a focusing lens; a probe system comprises two routes of optical fiber sensing lines, one end of a first route of optical fiber is connected with a gem crystal probe, and the other end is connected with the focusing lens; one end of a second route of optical fiber is connected with the gem crystal probe, and the other end is connected with a photoelectric converter via light signal; the two routes are staggered back and forth, the energy of the first route LED light source of optical fiber is transmitted to the surface of an air path via optical fiber and the gem crystal probe, enters pulmonary artery through the air path, returns to the internal side of the air path after being subjected to the diffuse reflection of the photon acted with blood, and is absorbed by the second gem crystal probe of the second route, light signal after optical fiber transmissison is absorbed by the photoelectric converter, enters a computer after amplified shaping circuit and data acquisition, and gives out parameters such as pulmonary artery blood oxygen saturation, cardiac rate and the like by software processing. The invention can realize high-precise real time monitoring without trauma.

Description

technical field [0001] The invention relates to a medical monitoring device, in particular to a device for monitoring pulmonary artery blood oxygen saturation with optical fiber sensing. Background technique [0002] The survival of human cells mainly depends on sufficient oxygen supply to meet their metabolic needs. If the oxygen supply is insufficient, the function of the cells will be damaged or even die. Therefore, when dealing with critically ill patients, only paying attention to hemodynamic indicators such as blood pressure cannot ensure sufficient oxygen supply. Only by providing sufficient oxygen supply can normal cell metabolism function be maintained. The monitoring of blood oxygen can well reflect the tissue oxygenation function. Through blood oxygen monitoring, we will greatly improve the safety of clinical anesthesia and respiratory therapy for critically ill patients. [0003] At present, there are two main types of instruments for monitoring blood oxygen in...

AI Technical Summary

Problems solved by technology

The main disadvantage of this patent is that the commonly used reflective photoelectric detection device, i.e. two light-emitting diodes (660, 940nm) and photosensitive diode or triode are connected to the endotracheal tube air bag position by wires, which only changes the use mode of the original device, and The power supply is directly introduced into the endotracheal tube, which poses a safety hazard. The probe is directly composed of a light source and a photodetector, which leads to the surface of the probe being easily contaminated, and the relative position is not fixed

[0005] Chinese patent 03234971.8 discloses a pulmonary arterial blood oxygen saturation or pressure monitoring device, which also introduces a photoelectric sensor probe into the catheter to detect blood oxygen saturation. The disadvantages are the same as above.

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