Tag: Biomedical Instrumentation
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3 Common Causes of Anomalies in ECG Recordings
Irregular patterns of ECG may be caused by either pathological states or at times artefacts. Undesirable presence of artefacts on ECG trace may be due to the following: Interference from the Power Line This interference may be caused by the stray effect of the alternating current on the subject under measurement or because of alternating…
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What is Bioinstrumentation?
Bioinstrumentation involves the measurement of current or voltage signals from the different parts of the body. The measurement of various physiological signals produced by the body helps in diagnosis and treatment of diseases. In actual fact, when we talk about bioinstrumentation we mean biomedical instrumentation. Basic Bioinstrumentation System The quantity, property, or condition that is…
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5 Types of Biomedical Instrumentation Systems
We have the following five types of biomedical instrumentation/measurement systems: Direct/Indirect In biomedical instrumentation we may have the sensing system measuring a physiological parameter directly, such as the average blood flow in an artery or indirect measurement where a parameter related to the physiologic parameter of interest such as ECG recording at the body surface…
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4 Classifications of Biomedical Measurement Instruments
Instruments that are used in biomedical measurements can be grouped into four categories, based on the following: Classification Based on Quantity that is sensed The techniques employed in biomedical measurement can be grouped as per the quantity that is sensed, such as pressure, flow or temperature. This categorization makes it easier to compare the different…
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Common Challenges of EEG Analysis
Though EEG signal detection provides a key indicator for detection of neurological status and disorders, its biomedical application is limited. This is because of the complicated nature of EEG signal and the complexities regarding the interpretation of the signals. Some of the challenges of EEG analysis are discussed as follows: Artifacts The recordings of physiological…
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Key Features of Modern ECG Systems
Modern diagnostic and monitoring ECG acquisition and analysis systems are equipped with modern-day computer technology. ECG monitoring devices constitute an important part of the patient monitoring systems. Patient monitoring systems are used to continuously or intermittently measure the vital signs (ECG, heart rate, pulse rate, blood pressure and temperature) and perform automatic analysis on them.…
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The Principle of Immunoassay Biosensor
The principle of immunoassay sensor operation is based on the observation of ligand-binding reaction products between a target analyte and a highly specific binding reagent. The important component of an immunosensor is the biological recognition element, which normally consists of antibodies or antibody fragments. Immunological methods offer remarkable selectivity and sensitivity through the process of…
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Basic Features of Intravascular Fiber Optic Blood Gas Sensor
Intra-arterial blood gas sensors usually use a single or double fiber configuration. Typically, the matrix containing the indicator is attached to the end of the optical fiber. Because the solubility of O2 and CO2 gases, as well as the optical properties of the sensing chemistry itself, is affected by the temperature variations, fiber optic intravascular…
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How Arterial Tonometer is used for Blood Pressure Measurement
The arterial tonometer is an instrument used to measure arterial blood pressure. It differs from sphygmomanometer in that, rather than measuring the pressure at greatest contraction and greatest heart dilation (systolic and diastolic) it provides continuous measurement throughout the heart’s pumping cycle. Normally, the instrument sensor is placed over a superficial artery; the radial artery…