Retinal venous oxygen saturation and cardiac output during controlled hemorrhage and resuscitation.

TitleRetinal venous oxygen saturation and cardiac output during controlled hemorrhage and resuscitation.
Publication TypeJournal Article
Year of Publication2003
AuthorsDenninghoff KR, Smith MH, Lompado A, Hillman LW
JournalJ Appl Physiol (1985)
Date Published2003 Mar
ISSN Number8750-7587
KeywordsAnimals, Calibration, Cardiac Output, Cardiopulmonary Resuscitation, Hemorrhage, Oxygen Consumption, Retina, Retinal Vessels, Swine, Vitiligo

The objective was to test calibration of an eye oximeter (EOX) in a vitiligo swine eye and correlate retinal venous oxygen saturation (Srv(O(2))), mixed venous oxygen saturation (Sv(O(2))), and cardiac output (CO) during robust changes in blood volume. Ten anesthetized adult Sinclair swine with retinal vitiligo were placed on stepwise decreasing amounts of oxygen. At each oxygen level, femoral artery oxygen saturation (Sa(O(2))) and retinal artery oxygen saturation (Sra(O(2))) were obtained. After equilibration on 100% O(2), subjects were bled at 1.4 ml. kg(-1). min(-1) for 20 min. Subsequently, anticoagulated shed blood was reinfused at the same rate. During graded hypoxia, exsanguination, and reinfusion, Sra(O(2)) and Srv(O(2)) were measured by using the EOX, and CO and Sv(O(2)) were measured by using a pulmonary artery catheter. During graded hypoxia, Sra(O(2)) correlated with Sa(O(2)) (r = 0.92). Srv(O(2)) correlated with Sv(O(2)) (r = 0.89) during exsanguination and reinfusion. Sv(O(2)) and Srv(O(2)) correlated with CO during blood removal and resuscitation (r = 0.92). Use of vitiligo retinas improved the calibration of EOX measurements. In this robust hemorrhage model, Srv(O(2)) correlates with CO and Sv(O(2)) across the range of exsanguination and resuscitation.

Alternate JournalJ. Appl. Physiol.
PubMed ID12571124
Grant ListR49/CCR403641 / CC / ODCDC CDC HHS / United States
Faculty Reference: 
Kurt Denninghoff, MD