Lindsey C. Henson

Estimation of jugular venous O2 saturation from cerebral oximetry or arterial O2 saturation during isocapnic hypoxia.

AbstractObjective.Near-infrared spectroscopy (NIRS) has the potential forproviding valuable information about oxygen delivery to the brain. However,questions have been raised about the accuracy of these measurements. Thisstudy was undertaken to compare noninvasive cerebral saturation measurementsto jugular venous saturation under conditions of hypoxia and hypercapnia.Methods.Data was obtain on forty-two subjects. Cerebral oxygenationwas measured with a Somanetics INVOS 4100-SSA placed on the forehead of thesubjects. PETCO2 was controlled to approximately 2 and 7 mmHg aboveresting values and PETO2 was controlled to 80, 45, 60 and 41 mmHgconsecutively for four of five minutes each. Internal jugular blood gasmeasurements were made via a retrograde catheter. Results.Both thecerebral oximetry measured saturation (rSO2) and the jugular venoussaturation (Sj

Fitness as a determinant of oxygen uptake response to constant-load exercise

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Does a Subanesthetic Concentration of Isoflurane Blunt the Ventilatory Response to Hypoxia

O2) were significantly increasedby increasing the PETCO2 at all levels of hypoxia. The increase inthe rSO2 was less than the increase inSj

Lipoprotein lipase in cultured heart cells: characteristics and cellular location.

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Effects of Alfentanil on the Ventilatory Response to Sustained Hypoxia

O2. The rSO2 had a bias of 5.2%and a precision of 10.7% compared to the measuredSj