A centimeter (centimetre) of water or cm H2O is a less commonly used unit of pressure. Pressure (symbol 'p' is the force per unit Area applied to an object in a direction perpendicular to the surface It is used to measure the central venous pressure, the intracranial pressure while sampling cerebrospinal fluid, as well as determining pressures during mechanical ventilation or in water supply networks (then usually in metres water column). Central venous pressure (CVP describes the pressure of blood in the thoracic Vena cava, near the Right atrium of the heart Intracranial pressure, ( ICP) is the pressure exerted by the Cranium on the Brain tissue Cerebrospinal fluid (CSF and the brain's circulating Cerebrospinal fluid ( CSF) Liquor cerebrospinalis, is a clear Bodily fluid that occupies the Subarachnoid space and the Ventricular system In Medicine, mechanical ventilation is a method to mechanically assist or replace spontaneous breathing when patients cannot do so on their own A water supply network is a system of engineered Hydrologic and Hydraulic components including the watershed or geographic area that collects The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International It is also a common unit of pressure in the speech sciences.
It is defined as the pressure exerted by a column of water of 1 cm in height at 4 °C (temperature of maximum density) at the standard acceleration of gravity. Water is a common Chemical substance that is essential for the survival of all known forms of Life. A centimetre ( American spelling: centimeter, symbol cm) is a unit of Length in the Metric system, equal to one hundredth Height is the measurement of vertical Distance, but has two meanings in common use The Celsius Temperature scale was previously known as the centigrade scale.
This unit is commonly used to specify the pressure to which a CPAP machine is set after a polysomnogram. Polysomnogram (PSG is a multi-channel ("poly" recording ("gram" during sleep ("somno" resulting from a sleep test Polysomnography.
- 1 cmH2O = 98. 0638 pascals
To convert this measure to other units, the following conversion is used:
- 1 mmHg = 1. The torr (symbol Torr) is a non- SI unit of Pressure defined as 1/760 of an atmosphere. 36 cmH2O = 0. 133 kPa = 0. 0193 psi = 1. The pound per square inch or more accurately pound-force per square inch (symbol psi or lbf/in² or lbf/in²) is a unit of 3332 mbar
External links
- Pressure conversion calculator at Cornell University website
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