Erschienen in:
01.04.2003 | Meeting abstract
Assessment of variables affecting the accuracy of extravascular lung water (EVLW) by single versus double indicator dilution techniques in ARDS patients
verfasst von:
E Maggioni, F Sala, A Manfio, E Saccavino, B Cortinovis, G Bellani, N Patroniti
Erschienen in:
Critical Care
|
Sonderheft 2/2003
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Excerpt
Estimation of extravascular lung water (EVLW) by the single indicator dilution technique (SDT) implemented in the PICCO monitoring system relies on a relationship between intrathoracic blood volume (ITBV) and global end diastolic volume (GEDV), which has been derived from a large population of mixed critically ill patients using the double indicator dilution technique (thermal and indocyanine green dyes, DDT): ITBV
sdt = 1.25 × GEDV [
1]. Since the difference between ITBV and GEDV corresponds to pulmonary blood volume (PBV), we can write: PBV
sdt = 0.25 × GEDV. Any factor influencing this relationship can affect SDT accuracy. The aims of our study were: 1) to compare SDT versus DDT for EVLW measurements in ARDS patients; and 2) to explore factors influencing the PBV and GEDV relationship, and affecting SDT accuracy. …