Detail publikace
Measurement of blood filling in lower limbs by bioimpedance method
MATEJKOVÁ, M. SOUKUP, L. VONDRA, V.
Originální název
Measurement of blood filling in lower limbs by bioimpedance method
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Background: Cardiovascular diseases are the leading causes of mortality and morbidity in modern society. The autonomic nervous systems innervate blood vessel walls and regulate contraction and wall tension. The head-up tilt test is frequently performed for evaluating sympathetic nervous system function. The filling of the lower extremities during the head-up tilt test is measured by the bioimpedance method. Increased blood volume in the area of interest increases the electrical impedance of this area. Methods: We used a mathematical fitting model to express the measured data. A B time constant of a decreased bioimpedance signal during a head-up tilt was calculated for the right leg during various time intervals of tilt duration. We optimized the duration in a study protocol based on corresponding measured data and a calculated model. A group of 22 healthy volunteers (11 men and 11 women) participated in the study protocol: the protocol included a 2-minute supine position and 5-minute head-up tilt test. Results: According to the Mann-Whitney test, there were no statistical differences in the B constant between the groups of men and women. Our results showed the optimal time duration of the head-up tilt test to be about 270 s. Conclusions: Calculating the time constant for decreased bioimpedance during a head-up tilt test might lead to a simple pre-diagnostic method for performing a non-invasive evaluation of the cardiovascular system.
Klíčová slova
bioimpedance; optimization; hemodynamics; tilt test
Autoři
MATEJKOVÁ, M.; SOUKUP, L.; VONDRA, V.
Vydáno
6. 12. 2017
Nakladatel
PALACKY UNIV, MEDICAL FAC, CENTRAL LIBRARY, HNEVOTINSKA 3, OLOMOUC, 00000, CZECH REPUBLIC
Místo
Olomouc
ISSN
1804-7521
Periodikum
BIOMEDICAL PAPERS-OLOMOUC
Číslo
161
Stát
Česká republika
Strany od
S15
Strany do
S19
Strany počet
5
URL