Author : Victory Madu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Book Synopsis Effects of Water Temperature and Skin Exposure on Underwater Breath-holding and Subsequent Minute Ventilation by : Victory Madu
Download or read book Effects of Water Temperature and Skin Exposure on Underwater Breath-holding and Subsequent Minute Ventilation written by Victory Madu and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopter crashes in cold water present a survival challenge to passengers especially if they are trapped underwater. We tested the effect of varying skin exposure and water temperature on underwater breath-hold time and subsequent minute ventilation. Twelve subjects (2 female) were studied in 8 and 20°C water while wearing a helicopter transport suit with a dive mask. At each temperature, subjects performed a maximum breath-hold and then breathed for 90 s (through a mouth piece connected to room air) in five skin-exposure conditions. The first trial was out of water for Control (suit zipped up, hood on, mask off). Four submersion trials were then conducted with exposure of the: Partial Face (hood and mask on); Face (hood on, mask off); Head (hood and mask off); and Whole Body (suit unzipped, hood and mask off). Decreasing temperature and increasing skin exposure reduced breath-hold time (to as low as 10 ± 4 s), generally increased minute ventilation (up to 40 ± 15 L.min-1), and decreased predicted endurance time (PET) of a 55-L Helicopter Underwater Emergency Breathing Apparatus (HUEBA); for example, in 8°C water, PET was 2 min 39 s (Partial Face) and decreased to 1 min 11 s (Whole Body) (P