Inspired and expired gas concentrations in man during carbogen breathing.
Capnometer measurements during 46 evaluable treatments in which patients were administered carbogen (95% O2, 5% CO2) have demonstrated that the mean inspired carbon dioxide level was 3.1% (range 0-4.7) and the mean inspired oxygen concentration was 70.6% (range 26.4-94). The explanation for this observation is leakage of air into the breathing system during radiotherapy.
Hoskin
P J
PJ
Mount Vernon Centre for Cancer Treatment, Mount Vernon Hospital, Northwood, Middlesex, UK.
Abdelath
O
O
Phillips
H
H
Gilligan
S
S
Saunders
M I
MI
Broderick
P
P
Baddeley
H
H
D019296:Capnography; D002245:Carbon Dioxide / Q000008:administration & dosage* / Q000032:analysis*; D006801:Humans; D008397:Masks; D010100:Oxygen / Q000008:administration & dosage* / Q000032:analysis*; D011838:Radiation-Sensitizing Agents / Q000008:administration & dosage*; D011878:Radiotherapy; D012143:Respiratory Physiological Phenomena
D011838:Radiation-Sensitizing Agents; D002245:Carbon Dioxide; C011700:carbogen; D010100:Oxygen