Semiconductor technology continues to play an important role in enabling the development of new technologies for portable, patient monitoring, diagnostics and therapy. Breakthroughs in MEMS sensor technology have also brought unprecedented convenience and experience to medical applications. According to research firm Transparency Market Research, the global MEMS medical application market is estimated to be $1.8 billion in 2012.
Since 1980, the number of obesity in the world has more than doubled. According to the World Health Organization, more than 1.4 billion adults are overweight worldwide. In 2009, 680 million people in the world aged 60 and over were overweight. Since 2007 alone, the number of obese people has increased by 10.4 million - an average of 30,000 per day. These trends are the main factors that breed chronic diseases. Excessive weight and lack of physical exercise can easily lead to diabetes and cardiovascular disease. Population ageing is another risk factor for respiratory diseases, cardiovascular disease, stroke, arthritis and cancer. As aging and obesity become more prevalent, many countries face macroeconomic problems with increased health care costs. Currently, chronic diseases account for 75% of health care costs. Active and preventive health care methods are becoming more and more important.
With the continuous development of healthcare technology, these market trends have made medical care transformation possible. Clinical equipment used in hospitals or doctors' offices has now moved to the home. Portable medical devices such as sphygmomanometers, blood glucose meters, and weight scales are now connected to data hubs or send your personal monitoring data to a medical cloud that can be safely kept. All types of health care equipment are being transferred from the ward or hospital to the family.
In addition to bringing medical devices to the home, the widespread use of healthcare mobile connections can significantly reduce healthcare costs, increase the coverage and availability of healthcare services, and reduce the impact of disease on people's lives. As mobile module costs decrease, embedded mobile health solutions are expected to proliferate, creating opportunities for the development of innovative services. The remote patient monitoring function is designed to reduce the cost burden of unhealthy lifestyles and an aging population.
Semiconductor technology continues to play an important role in enabling the development of new technologies for portable, patient monitoring, diagnostics and therapy. Breakthroughs in MEMS sensor technology have also brought unprecedented convenience and experience to medical applications. According to research firm Transparency Market Research, the global MEMS medical application market is estimated to be US$1.8 billion in 2012. It is expected that the market will grow at a compound annual growth rate of 20.2% from 2013, and the market size will reach 6.5 billion by 2019.
As a semiconductor company, Freescale has always focused on what we can do? How to help people prolong life and help people improve their quality of life. Freescale Xtrinsic's Micro-Electro-Mechanical Systems (MEMS)-based pressure and acceleration sensors can be used to provide vital information in healthcare monitoring applications: sphygmomanometers; invasive sphygmomanometers; intrauterine pressure monitors; hospital bed controls; respirators and Ventilator; sleep apnea monitor; health and fitness system; dialysis equipment; drug delivery for inhalers; physical therapy equipment; activity monitor.
sphygmomanometer
Ageing and obesity can lead to high blood pressure. Hypertension refers to the long-term impact of high-pressure blood flow on the arterial wall, which may cause health problems such as heart disease. The amount of blood provided by the heart and the resistance to blood flow in the arterial wall will determine blood pressure. The more blood your heart provides, the narrower your arterial wall and the higher your blood pressure.
Home automatic sphygmomanometers are increasingly being used for the diagnosis and management of hypertension. Home automatic sphygmomanometers include arm and wrist units. The following figure shows a block diagram of the system module for a typical sphygmomanometer.
Sphygmomanometer internal block diagram
The basic function of a sphygmomanometer is to measure the pressure on the arterial wall. One way to obtain this measurement is to use a pressure sensor that measures the current pressure. The constant change in blood pressure changes the rate at which the motor of the air pump is controlled. The airbag is pressed against the arm to cause systolic pressure. When the systolic pressure is reached, the valve surrounding the arm gradually releases air. At the same time, the pressure sensor will take measurements.
Freescale Xtrinsic pressure sensors, such as the MPXV5050GP, are designed for applications that require high quality and reliability. Freescale sensors have a range of functions and features, from basic devices to fully amplified and temperature compensated devices. A large series of products can be easily connected to the MCU. Designed to meet power efficiency requirements, the low pressure pressure sensor family helps extend the life of simpler and more economical medical and portable electronic devices. Freescale pressure sensors use micromachining, thin film metallization and bipolar semiconductor processing to deliver highly accurate, highly reliable sensors at competitive prices.
Activity monitor
Insist on physical activity can help people reduce or prevent chronic diseases caused by obesity and aging. The activity monitor is a small device that records information about how the user is exercising and has a long life. The Activity Monitor continuously interprets and summarizes the recorded data. The instrument is a non-invasive acquisition system and base module that includes a pedometer that calculates the number of steps by measuring the vertical acceleration and calculates the cumulative time spent on a particular activity. Once accurately positioned, the device records every step of your walk and records daily activities such as going up and down stairs, bending over your shoelaces. This device is often worn on the user's hips or wrists.
Inertial sensors are the basis of many activity monitors. Inertial sensors are designed to detect changes in force caused by motion, tilt, positioning, shock and vibration. For motion detectors and free fall detectors that require fast response, high sensitivity, low current consumption, low voltage operation and operation in standby mode in a small package, Freescale's accelerometers are the ideal solution.
Inertial sensors can also be used to detect a patient's fall due to abnormal physical conditions. For example, if blood sugar levels are too low, the patient may lose consciousness and faint. Inertial sensors can be used to detect people's fall behavior. The sensor's output signal can be used to activate an alarm or to send an alarm via wireless communication.
Activity and health monitoring module block diagram
The Freescale MMA8451Q is a smart low power 3-axis capacitive MEMS accelerometer with 14-bit data accuracy. This accelerometer features flexible, user-programmable embedded features that allow configuration of two interrupt pins. The embedded interrupt feature saves overall power and eliminates the need for the main processor to continuously poll data. As mentioned earlier, it plays a vital role in active or free-fall monitors, allowing you to connect to low-pass data or connect to Qualcomm data to minimize impact detection and faster transfer. Data analysis. The device generates an inertial wake-up interrupt signal from any combination of configurable embedded functions, allowing the MMA8451Q to monitor events and maintain low power consumption when inactive. The MMA8451Q is available in a 3mm & TImes; 3mm & TImes; 1mm QFN package.
Freescale's Xtrinsic MPL3115A2 provides very accurate pressure and altitude data with the ability to adjust the sampling frequency. It has very low power consumption and a variety of intelligent features that do not require medical applications for data processing. The device has less than 1 foot resolution and can be used to supplement accelerometer data.
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