cmH₂O
centimeter of water column
Pressureexact by definition
The centimetre of water column is exactly 98.0665 pascals on the conventional basis. It is the unit of respiratory medicine: ventilator pressures, CPAP settings and lung compliance are all in cmH₂O, and a normal breath moves about 5 to 10 of them.
| 1 cmH₂O | 0.0980665 kPa |
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