Noninvasive measurement of regional blood flow in man
The ability to measure blood flow in specific regions of the body is important for the diagnosis and treatment of many vascular diseases, as well as regulation of drug response and wound healing. The ideal method of blood flow measurement is noninvasive, accurate, can be used repeatedly. There are many noninvasive methods of evaluating regional blood flow, but no single method is accurate at every location in the body. The various methods available to both the practicing physician and the researcher are presented, including the strengths and weaknesses of each method. The methods reviewed are: plethysmography, Doppler ultrasound, laser Doppler velocimetry, noninvasive electromagnetic flowmetry, nuclear magnetic resonance, hydrogen clearance and xenon 133 inhalation. For each method, the site of measurement, the tissue measured and the applications are presented. Selection of the appropriate method is based on knowledge of the volume of tissue in which the measurement is made. An algorithm for selecting the best method of blood flow measurement is presented. Plethysmography remains the best method for measurement of limb blood flow when accurate, quantitative measurement is essential. For peripheral vascular disease and study of a limb following surgery, Doppler may be more suitable. Blood flow to the skin and mucosa can now be measured with laser Doppler and local hydrogen techniques. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: American Journal of Surgery
What you need to know when you go with the flow: pitfalls in the use of flow cytometry
Scientists should be aware of the limitations and strengths of flow cytometry testing and the best ways to present the resulting data. Flow cytometry is a laboratory test that measures the size and molecular characteristics of individual cells based on a fluorescence detecting method. The stability of the target cells, the fluorescent signal, and the testing equipment may affect the reproducibility of flow cytometry measurements. The choice of summarizing flow cytometry data in terms of logarithmic, linear, or percentage comparisons may affect how meaningful the data are to the reader.
Publication Name: Annals of the Rheumatic Diseases
In Bangladesh, arsenic-free water set to flow from cheap new filter
Villagers in Bangladesh and neighboring states are supplied with contaminated drinking water in which the water is laced with toxic level of arsenic making it unsafe for drinking. Hence, a new filter dubbed ARUBA for arsenic removal using bottom ash is introduced which might have an initial cost of under $10 and an annual maintenance cost of $2 per person to replace and dispose of the used filters.
Publication Name: Nature Medicine
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- Abstracts: Seeking new dimensions in international health research. International health assistance for Eurasia. International teleradiology
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