Medical Definition of Microsphere method

1. A method for measuring organ blood flow by indicator dilution, but more importantly, a method for measuring the distribution of cardiac output or the intraorgan distribution of blood flow. To measure distribution of flow, neutrally buoyant, chemically inert microspheres that have an indicator property (e.g., radioactivity) are injected into a cardiac chamber or arterial blood. They are presumed to distribute in proportion to the distribution of arterial blood flow. Injected sphere size is selected to be large enough to embolise the vessels of interest. Injected quantity is selected to be large enough to provide statistically meaningful samples and small enough not to alter the organ blood flow under investigation. Organ samples are taken to quantify the distribution of the microspheres and hence the flow. See: Fick method, Stewart-Hamilton method. (05 Mar 2000)

Lexicographical Neighbors of Microsphere Method

microsomal antibody
microsomal fraction
microsome
microsome
microsomes
microsomes
microsomia
Microsorium
Microsorium punctatum
microspectrophotometry
microspectroscope
microsphere
microsphere
microspheres
microspheres
microsphere method (current term)
microspherical
microspherocytosis
microsphygmy
microsphyxia
microspike
microsplanchnic
microsplenia
microspora
microsporangia
microsporangium
microsporangium
Microsporasida
microspora infections
microspore

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