Abstract
Ten men were exposed to hyperbaric oxygen (HBO 2 ), and their tissue oxygen levels were monitored after they drank either placebo or caffeine beverages. Transcutaneous tissue oxygen (PtcO 2 ) monitor measurements in a normobaric air environment were initially obtained from transducers on the subject's chest and foot. The subjects then consumed either the caffeine (3 mg.kg-1) or the placebo beverage, and after 20 min the subjects were pressurized in a hyperbaric chamber to 2.36 atm abs (1 atm = 101.3250 kPa). The test subjects began breathing 100% oxygen at 2.36 atm abs, 30 min after administration of the experimental beverage, and continued for 30 min, after which the final chest and foot PtcO 2 measurements were recorded (1 h after ingestion of the test drink). Each subject underwent a second hyperbaric exposure during which the alternate drink was administered (either the placebo or the caffeine), and PtcO 2 measurements were again obtained. The increase in right foot PtcO 2 values during HBO 2 exposure was significantly smaller after caffeine consumption than after placebo (P = 0.0018).
| Original language | American English |
|---|---|
| Journal | Undersea and Hyperbaric Medicine |
| Volume | 26 |
| State | Published - Jul 1 1999 |
Disciplines
- Applied Mathematics
- Applied Statistics
- Mathematics
- Physical Sciences and Mathematics
- Statistics and Probability