The altitude sickness study conducted in the Valais Alps has delivered a sizeable yield: almost 1500 vials containing blood samples from the test subjects, frozen in dry ice at minus 80 degrees Celsius, were transported from the Margherita Hut at an altitude of 4554 metres back down to the DLR Institute of Aerospace Medicine in Cologne. There are also just under 200 urine samples, 44 saliva samples and 66 blood counts. The test subjects themselves are also contributing 11 carefully kept 'journals', in which they noted the extent to which they felt symptoms of altitude sickness. Twenty-two measurements of the test subjects' blood pressure and another 22 revealing oxygen saturation levels in their blood are also included in the dataset. For investigator Ulrich Limper this means a detailed evaluation that will take over six months to complete.
Departure from the top station
The test subjects completed their morning ritual for the last time on Monday, 22 August: upon waking, they measured their blood pressure in a supine position and then hopped onto the scales. The investigator in the study drew blood one final time. And then, at 07:00, the first group set off across the glacier accompanied by a mountain guide, and headed for the cable car station in Punta Indren to travel from the vantage point at 1600 metres to the base of the valley. Meanwhile, the second group was busy packing the equipment left at the Margherita Hut: the ultrasound device, crates of samples tucked away in dry ice and luggage. Altogether, 600 kilograms had to be prepared for return transport by helicopter. read more