Bioelectrical impedance analysis: Difference between revisions
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imported>Pierre-Alain Gouanvic (New page: ''Bioelectrical impedance analysis'' is a technique used in medicine to evaluate the reactance and resistance of a patient's tissues (especially in chronic conditions such as [[can...) |
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''Bioelectrical impedance analysis'' is a technique used in medicine to evaluate the [[reactance]] and [[resistance]] of a patient's tissues (especially in chronic conditions such as [[cancer]], [[liver cirrhosis]], [[HIV infection]], and in the course of [[dialysis]]).<ref name="pmid15585779">{{cite journal |author=Gupta D, Lammersfeld CA, Burrows JL, ''et al'' |title=Bioelectrical impedance phase angle in clinical practice: implications for prognosis in advanced colorectal cancer |journal=Am. J. Clin. Nutr. |volume=80 |issue=6 |pages=1634–8 |year=2004 |month=December |pmid=15585779 |doi= |url=http://www.ajcn.org/cgi/pmidlookup?view=long&pmid=15585779}}</ref> When a [[current]] is applied to a [[biological specimen]], reactance causes the current to lag behind the [[voltage]], creating a [[phase shift]]. When quantified geometrically, this shift is termed a [[phase angle]]. | {{subpages}} | ||
'''Bioelectrical impedance analysis''' is a technique used in medicine to evaluate the [[reactance]] and [[resistance]] of a patient's tissues (especially in chronic conditions such as [[cancer]], [[liver cirrhosis]], [[HIV infection]], and in the course of [[dialysis]]).<ref name="pmid15585779">{{cite journal |author=Gupta D, Lammersfeld CA, Burrows JL, ''et al'' |title=Bioelectrical impedance phase angle in clinical practice: implications for prognosis in advanced colorectal cancer |journal=Am. J. Clin. Nutr. |volume=80 |issue=6 |pages=1634–8 |year=2004 |month=December |pmid=15585779 |doi= |url=http://www.ajcn.org/cgi/pmidlookup?view=long&pmid=15585779}}</ref> When a [[current]] is applied to a [[biological specimen]], reactance causes the current to lag behind the [[voltage]], creating a [[phase shift]]. When quantified geometrically, this shift is termed a [[phase angle]]. | |||
The phase angle reflects the relative contributions of body fluids (resistance) and [[cell membrane]]s (reactance) of the human body. | The phase angle reflects the relative contributions of body fluids (resistance) and [[cell membrane]]s (reactance) of the human body. | ||
Revision as of 19:23, 8 December 2008
Bioelectrical impedance analysis is a technique used in medicine to evaluate the reactance and resistance of a patient's tissues (especially in chronic conditions such as cancer, liver cirrhosis, HIV infection, and in the course of dialysis).[1] When a current is applied to a biological specimen, reactance causes the current to lag behind the voltage, creating a phase shift. When quantified geometrically, this shift is termed a phase angle.
The phase angle reflects the relative contributions of body fluids (resistance) and cell membranes (reactance) of the human body.
As such, BIA has been suggested to be a reliable indicator of body cell mass and nutritional status.
References
- ↑ Gupta D, Lammersfeld CA, Burrows JL, et al (December 2004). "Bioelectrical impedance phase angle in clinical practice: implications for prognosis in advanced colorectal cancer". Am. J. Clin. Nutr. 80 (6): 1634–8. PMID 15585779. [e]