MSP430 Applicationin the medical equipment industry
source: icbuy million core time: 2012-04-05
MSP430 Series MCU is widely used in medical equipment industry, with its low power consumption, simple periphery design has been the designer's love. While ECG or CT complex medical equipment application a lot. ECG is one of the important instrument to diagnose heart disease, can provide the most intuitionistic ECG waveform for doctors. Europe and the United States has been widely used in twelve lead ECG machine. Twelve lead ECG recording can objectively express the wave, and interval, the beats, heartbeat tachycardia, preexcitation syndrome, bundle branch block and branch block positioning diagnosis and differential diagnosis; ECG data stored in the database, can be a variety of electrical parameters statistically, brings great convenience to the clinical and research work. Successfully developed a portable electrocardiograph based on microelectronics, MCU and computer technology, it can display ECG through the liquid crystal display, and display of data on the computer and the network information transmission, electrocardiogram machine is a novel clinical and family and.
standard twelve lead
The human body is a conductor, the action potential of cardiac wall contraction caused the current from the heart to the whole body, current spreading have different potential in different parts of the body, through the electrode on the surface of the skin induction draw. In order to complete the record of the electrical activity of the heart, twelve kinds of lead used in horizontal and vertical direction of the records, known as the standard twelve lead, namely I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6. The measurement must be 10 electrodes, placed on the human body are respectively: the right hand, left hand electrode electrode VR VL, right leg, left leg RL electrode electrode VF, chest 6 electrodes C1~C6. According to the national standard, the electrode can be synthesized by the standard 12 lead ECG, synthesis methods are as follows:
(1): standard limb leads
(2) augmented unipolar limb lead:
AVR=VR- (VL+VF) /2;
AVL=VL- (VR+VF) /2;
AVF=VF- (VL+VR) /2;
(3) the common chest leads:
Chest lead Vi=Ci- (VR+VL+VF) /3, type, VR, VL, VF and Ci (i=1~6) said the right arm, left arm, left leg and the potential of chest wall.