The electrodes used for measurement of partial pressure of CO2 in blood are based on measuring the pH as demonstrated in the figure below:
The measurement is based on the fact that … Read More
Tag: Biomedical measurements
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 … Read More
How Spectrofluorimeters are used in Biomedical Measurements
After absorption of light energy, all compounds release some energy as heat; fluorescent compounds represent a special case in which some energy is also given off as light. Spectrofluorimeters are optical devices that measure the amount of light that is … Read More
Principle of Operation of a Medical Mass Spectrometer
A mass spectrometer is an instrument that produces a stream of charged particles (ions) from a substance being analyzed, separates the ions into a spectrum according to their mass-to-charge ratios, and ascertains the relative abundance of each type of ion … Read More
The Measurement of Ultraviolet Radiation in Biomedical Field
The measurement of ultraviolet radiation in biomedical field may be categorized into three classes:
- Physical
- Biological
- Chemical
In general, physical devices measure power, whereas chemical and biological systems measure energy.
The common radiometric terminology is shown in the table below:… Read More
Optical Tomographic Imaging
The optical properties of normal and diseased tissues are usually different despite the large variation of values in optical properties of the normal tissues alone. A case in point is the cancerous tissues that manifest significant architectural changes at the … Read More
What is Echocardiography?
Echocardiography is a diagnostic technique that employs ultrasound to produce an image of the beating heart in real time. A piezoelectric transducer element is used to emit short bursts of high frequency, low intensity sound through the chest wall to … Read More
The Function of a PET scan in Biomedical Diagnostics
Key Features of EMG Amplifiers
The amplifiers used for clinical EMG recording must meet same strict specifications for low-leakage currents as do ECG, EEG, and any other amplifiers used to measure human body potentials.
EMG amplifier gains are typically x1000 and their bandwidths reflect … Read More
5 Established Isolation Architectures for Medical Isolation Amplifiers
Medical isolation amplifiers provide an ultra-low conductive pathway between the input (patient) terminals and the output terminals and ground. This pathway provides what is called ohmic or galvanic isolation for a patient. In medical applications, this isolation is required for … Read More