Question

Please explain the devices listed below in detail and how they operate. 1. ECG 2. EEG

Please explain the devices listed below in detail and how they operate.

1. ECG
2. EEG

Homework Answers

Answer #1

1) ECG- * DEFINITION- ECG DEVICES ARE USED TO PRODUCING AN ELECROXARDIO GRAM FROM THE ELECTRICAL SIGNALS FROM THE HEART. * IT HELPS TO DETECT ARRYTHMIAS, CORONARY ARTERY DISEASE, HEART ATTACK ETC * IT IS A SAFE PROCEDURE * IT CONSIST OF ELECTRODES, CONNECTING WIRES, AN AMPLIFIER AND STORAGE AND TRANSMISSION DEVICES. * TWO TYPES OF ECG PRESENT- BI POLAR( LIMB LEADS) UNIPOLAR ( AUGMENTED LIMB LEADS OR CHEST LEADS) * IT CONSIST OF 12, OR 3,0R FIVE LEADS. _ IN 12 LEADS ; 6 ARE LIMB LEADS- PLACED ON ARMS AND LEGS (1, II, III, avL, avR, avF) - another 6 are PRECORDIAL LEADS- PLACED ON CHEST ( V1, V2, V3, V4, V5, V6). * WORKING PRINCIPLE _ STIMULATION OF MUSCLE ALTERS THE ELECRICAL POTENTIAL OF MUSCLE FIBERS. *HOW IS WORKING - WHEN 12 ELECTRODES ARE PLACED ON LIMBS AND CHEST. _ ELECTRODES ARE CONNECTED TO A WIRE, WIRE CONNECTED TO A MONITOR _ THEN RECORDED THE ELECTRICAL SIGNALS FROM THE HEART BEAT INTO A PAPER. 2) EEG MACHINE * IT IS THE DEVICE USED TO FIND PROBLEMS RELATED TO ELECTRICAL ACTIVITY OF THE BRAIN. * IT HELPS TO DETECT SEIZURE DISORDER. * IT CONSIST OF SMALL METAL DISC WITH ELECTRODES OR WIRES. * WORKING PRINCIPLE OF EEG _ SMALL ELECTRODES AND WIRES ARE ATTACHED TO SCALP. _ THE ELECTRODES OBTAIN BRAIN WAVES _ EEG MACHINE AMPLIFIES THE SIGNALS _ RECORDS INTO A WAVE PATTERNS _ THE WAVE PATTERN COPIES INTO A PAPER OR INTO COMPUTER. * EEG MACHINE GIVES FOUR TYPES OF BASIC PATTERNS ( ALPHA, BETA, DELTA, THETA)

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