As a new type of sensor, the optical fiber sensor has the incomparable advantages of traditional sensors, such as: high measurement accuracy, large measurement dynamic range, fast response speed, immunity to electromagnetic interference, explosion-proof, flame-proof, anti-corrosion, easy long-distance measurement and Reuse, small size, simple structure, high mechanical strength, etc. In the early days, optical fibers were mainly used in the communication field. Later, with the development of optical fiber sensing technology, optical fiber temperature sensors, optical fiber pressure sensors, and optical fiber displacement sensors have gradually been widely used in chemical industry, bridges, aviation, military, etc., and special materials The manufactured optical fiber sensors are also used in biomedical sensing, such as optical fiber oximeters, optical fiber blood flow meters, and optical fiber thermometers.
In the process of clinical medical treatment and minimally invasive surgery, it is very important to measure the pressure and temperature of the cardiovascular, intracranial, spine, bone marrow, bladder, kidney and other organs and parts in the body. For example, intracranial pressure is an important observation index in neurosurgery clinical and scientific research. The cranial cavity contains three contents: brain tissue, cerebrospinal fluid, and blood, which maintain a certain pressure inside the skull, which is called intracranial pressure (ICP). Increased intracranial pressure (increased intracranial pressure) is a common clinicopathological syndrome in neurosurgery. It is a common sign of craniocerebral injury, brain tumor, cerebral hemorrhage, hydrocephalus and intracranial inflammation. Increased intracranial pressure can cause brain herniation. It can cause death of patients due to respiratory and circulatory failure. Therefore, timely diagnosis and correct treatment of increased intracranial pressure are very important; pericardiocentesis has a high risk of puncture failure and perforation. If the pericardial pressure frequency signal can be provided to cardiologists, it will be safer to perform pericardiocentesis and provide an important treatment method for certain heart disease patients; during the minimally invasive treatment of kidney stones, the laser will fragment the stones. High temperature will be generated during the stone, which needs to be washed and cooled with cooling water, and too high water pressure will cause damage to the kidneys, so simultaneous monitoring of the pressure and temperature during the laser lithotripsy process can ensure that the corresponding organs are not damaged.
In response to the above problems, a minimally invasive system for real-time monitoring of pressure and temperature in the human body is used to realize the simultaneous online monitoring of pressure and temperature in the cardiovascular, intracranial, spine, bone marrow, bladder, kidney and other organs and parts of the human body. It enables medical staff to keep abreast of the situation in order to treat and treat the patient in time. It has accurate measurement, simple sensor probe structure, small size, small trauma, and good compatibility. At the same time, the use of all-optical detection will not damage the nerves. unit.
An integrated system for minimally invasive human body pressure and temperature real-time monitoring, including computer, wireless transmission module, data acquisition unit, integrated demodulation module, transmission fiber and flexible fiber FP pressure and temperature composite sensor probe, flexible The optical fiber FP pressure and temperature composite sensor probe is connected to the integrated demodulation module through the transmission fiber. The integrated demodulation module is connected to the data acquisition unit through the communication interface. The data acquisition unit is connected to the wireless transmission module. The wireless transmission module is connected to the computer. Corresponding settings.
Furthermore, the system introduces the light source into the flexible optical fiber FP composite sensor probe of the human body to be measured through the transmission fiber, and at the same time transmits the FP composite cavity interference signal light detected by the sensor probe back to the demodulation unit, and through the The interference signal light is demodulated to obtain the pressure and temperature to be measured.