What Researchers Did
Researchers studied ten healthy adults undergoing repeated simulated extravehicular activity (EVA) in an altitude chamber to see how their blood fats changed.
What They Found
Decompression sickness (DCS) occurred in 7 cases, and venous gas bubbles were detected in 27 cases (84.4%). Before the second decompression, total lipids in red blood cell membranes decreased significantly, from 54.6 mg% to 40.4 mg% in those with DCS symptoms and from 51.2 mg% to 35.2 mg% in those without. Subjects with DCS symptoms also showed changes in specific fatty acids in their red blood cell membranes.
What This Means for Canadian Patients
This research suggests that repeated exposure to simulated extravehicular activity can alter blood lipid metabolism and red blood cell membranes, especially in individuals who develop decompression sickness. Understanding these biochemical changes could potentially help in developing strategies to prevent or manage decompression sickness, which is a recognized indication for hyperbaric oxygen therapy (HBOT).
Canadian Relevance
This study covers decompression sickness, which is a Health Canada-recognized indication for hyperbaric oxygen therapy.
Study Limitations
The study involved a small number of participants and was conducted in a simulated environment, which may limit its direct applicability to real-world scenarios.