UNDERWATER BREATHING4 BY
RONALD WOOLMER, F.F.A.R.C.S.
Surgeon Commander,
R.N.V.R.
is eommony
if we are to atmosphere at sea-level ^ know something about must we but to perfectly adapted it, and nderstand the effect of departures from it. cc?rP 0f xc lb. p.s.i., a in* The weight of the atmosphere at sea-level exerts Pr? 3? ^ of merCury will balance a column of sea-water 33 ft. ig equally exerted is rirpe.cUre is p '60 mm.) high. As long as the glottis is open, The pressure of the
,
e are
>
the inside and outside of the chest. ovrin?Pa to 2 atmospheres A diver in a non-rigid suit 33 ft. below the sur ace isand if theomsideo on ressure, or 30 lb. p.s.i. This is the pressure is chest is not to collapse the air inside it mus supplied to the diver ie At 300 ft. the pressure is 10 atmospheres, an the pU\monary o 2 rnst be at this pressure too. The partial pressure because the than more lood is exposed at 10 atmospheres inereases ^ PP artial pressures of water and C02 do not rise, an that the plasma the inl pias This pressure pushes so much oxygen into solution This came in ssues have to draw little or none of the 02 ^ |es3 base turn the t;ssues insequently remains unreduced. This in of CO. away j /ailable to combine with C02, and the carriage
a
.
tenfold^
lay be seriously interfered with. , t Similarly nitrogen is driven into solution m reat quantities. So long as the pressure driving hysical harm, though it may produce nitrogen narc irebral function, similar to alcoholic intoxicatio iced by divers. Other inert gases have a simila to lolecular Xenon has recently been shown
j
.
tk
RONALD WOOLMER, F.F.A.R.C.S.
Surgeon Commander,
R.N.V.R.
is eommony
if we are to atmosphere at sea-level ^ know something about must we but to perfectly adapted it, and nderstand the effect of departures from it. cc?rP 0f xc lb. p.s.i., a in* The weight of the atmosphere at sea-level exerts Pr? 3? ^ of merCury will balance a column of sea-water 33 ft. ig equally exerted is rirpe.cUre is p '60 mm.) high. As long as the glottis is open, The pressure of the
,
e are
>
the inside and outside of the chest. ovrin?Pa to 2 atmospheres A diver in a non-rigid suit 33 ft. below the sur ace isand if theomsideo on ressure, or 30 lb. p.s.i. This is the pressure is chest is not to collapse the air inside it mus supplied to the diver ie At 300 ft. the pressure is 10 atmospheres, an the pU\monary o 2 rnst be at this pressure too. The partial pressure because the than more lood is exposed at 10 atmospheres inereases ^ PP artial pressures of water and C02 do not rise, an that the plasma the inl pias This pressure pushes so much oxygen into solution This came in ssues have to draw little or none of the 02 ^ |es3 base turn the t;ssues insequently remains unreduced. This in of CO. away j /ailable to combine with C02, and the carriage
a
.
tenfold^
lay be seriously interfered with. , t Similarly nitrogen is driven into solution m reat quantities. So long as the pressure driving hysical harm, though it may produce nitrogen narc irebral function, similar to alcoholic intoxicatio iced by divers. Other inert gases have a simila to lolecular Xenon has recently been shown
j
.
tk
