Primary purpose is for measuring pulmonary gas exchange (PGE).
The oxygen inspired and the CO2 expired.
It's the same as the T-bag technique.
Albert E. Douglas died in 1908.
Albert E. Douglas was born in 1860.
Raymond E. Douglas was born in 1948.
Raymond E. Douglas died in 2007.
John E. Douglas was born in 1945.
Douglas E. Wright was born in 1955.
Douglas E. Dickey died on 1967-03-26.
Douglas E. Dickey was born on 1946-12-24.
Douglas E. Winter was born on 1950-10-30.
Douglas E. Lynch was born on 1964-05-07.
Douglas E. Delaney has written: 'The soldiers' general'