Blood gas tension Blood gas tension Blood gas tension refers to the partial pressure of gases in blood. There are several significant purposes for measuring gas tension; the most common gas tensions measured are oxygen tension (PO), the carbon dioxide tension (PCO) and carbon monoxide tension (PCO). The subscript "x" in each symbol represents the source of the gas being measured; ""a"" meaning arterial, ""A"" being alveolar, ""v"" being venous, ""c"" being capillary. Blood gas tests (such as arterial blood gas tests) measure these partial pressures. PO – Partial pressure of oxygen at sea level (765 mmHg) in arterial blood is between 75
The Machine Stops (album) The Machine Stops (album) The Machine Stops is a concept album by space rock band Hawkwind, released on 15 April 2016. It is inspired by the E.M. Forster novel of the same name. It is Hawkwind's twenty-ninth studio album, Hawkwind's first album recorded without the involvement of Tim Blake since 2010's "Blood of the Earth" and the first to feature bassist Haz Wheaton. Following "Spacehawks", which was a compilation album largely consisting of re-recorded songs, and "Stellar Variations" which had been released under the Hawkwind Light Orchestra moniker, "The Machine Stops" is Hawkwind's first studio album composed entirely of new