China's medical device market is growing at a rate of 15% per year, but domestically produced devices are still relatively large in high-end markets such as imaging diagnostic equipment, clinical monitoring equipment, laser instruments, cardiovascular surgical products and catheter devices. gap. While domestic enterprises pay attention to independent technological innovation, on the other hand, through acquisitions and cooperation, they have introduced advanced foreign technology, selected world-class components, improved product quality, and strived to enter the high-end market.
High-end medical devices place higher demands on medical sensors for accuracy, stability, reliability and functional size.
Minimally invasive catheter and ablation surgery
Modern minimally invasive surgery greatly reduces the trauma of surgical patients, alleviates their pain and speeds up their recovery process. In order to achieve this goal and dream, in addition to surgical experience and monitoring equipment, more important is the miniaturization of various interventional medical devices. These include a variety of catheters and ablation devices.
At present, catheters are mainly divided into thermodilution catheters, esophageal catheters, urethral tubes, central venous catheters, and intracranial pressure catheters. According to different practical applications, the catheters need to be installed with the corresponding temperature or The pressure sensor provides important index parameters for patient pathology and minimally invasive surgery.
Radio frequency refers to the radio frequency, and the main effect on the organism is the thermal effect. When the current frequency of the radio frequency is high to a certain value (>100 kHz), it causes the charged ion movement in the tissue, ie, frictional heat generation (60 to 100 ° C). Radiofrequency ablation devices commonly used at frequencies of 200 to 500 kHz and output powers of 100 to 400 watts. Common applications include intrauterine ablation, intracardiac ablation, and tumor ablation. Their main principle is to kill the metamorphic tissue by heating the lesions of the affected area or the radiofrequency of the tumor cells to achieve the ultimate therapeutic purpose.
The above-mentioned catheter and radiofrequency ablation minimally invasive surgery has the characteristics of small wounds and can not be directly observed, but the temperature and pressure parameters are the key parameters for the success of the operation, so the temperature sensor and pressure sensor installed at the front end are more demanding: size Tiny, but extremely accurate and reliable
Compared with the traditional mercury glass thermometer, the electronic thermometer has the advantages of no mercury, convenient reading, short measuring time, high measurement accuracy, and memory. The clinical fast electronic thermometer is a high-end product in such thermometers.
The fast response electronic thermometer generally consists of a temperature probe, a signal processing unit, a display screen, and a power supply. The signal processing unit has a heating algorithm and a prediction algorithm. The heating algorithm makes the temperature probe close to the human body temperature and shortens the temperature rise time; the prediction algorithm starts to run after the probe and the human body contact, and uses the trend of temperature rise to predict the final body temperature of the human body. In the best case, the thermometer can produce results in 4 seconds, which is much faster than the ordinary electronic thermometer for 2 minutes. The temperature measurement process is shown in Figure 2.
A key component of the fast response electronic thermometer is the temperature probe. In order to measure body temperature quickly and accurately, the temperature probe needs to use one or several high-precision fast-reacting thermistors, GE's SC30 thermistor, which is very suitable for such applications. At the same time, GE Sensing & Inspection offers more custom probe customization, enabling customers to implement a variety of well-designed probe solutions.
Medical and sleep breathing monitoring system
Respiratory monitoring systems are essential medical devices for medical procedures or for the treatment of sleep-disordered breathing disorders. It can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce respiratory power consumption, save the heart's reserve capacity; play a role in saving lives, treating respiratory diseases, and improving quality of life.
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