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Continuous On‐Line Optical Absorbance Recording of Blood Volume Changes during Hemodialysis
Author(s) -
Mancini Elena,
Santoro Antonio,
Spongano Marco,
Paolini Francesco,
Rossi Marco,
Zucchelli Pietro
Publication year - 1993
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.1993.tb00616.x
Subject(s) - blood volume , hypovolemia , hemodialysis , absorbance , biomedical engineering , volume (thermodynamics) , hemoglobin , dialysis , materials science , medicine , surgery , anesthesia , chemistry , chromatography , physics , quantum mechanics
Conventional techniques that measure blood volume changes during hemodialysis are invasive, hard to reproduce, and provide only intermittent evaluations. To overcome these drawbacks, we have developed an optoelectronic instrument that estimates intradialytic blood volume percentage changes by the optical absorbance of blood. This device is based on the absorption of light transmitted through blood, which is directly related to the hemoglobin concentration. A personal computer interfaced to the device provides a continuous on‐line graphic display of the hemoglobin levels and the percentage changes in blood volume. The noninvasive measurement of dialysis blood volume changes by an optical method may be helpful in detecting the appearance of severe hypovolemia that can be dangerous in critically ill patients.