Dead Space and The Ventilated Patient
The depth and frequency of our breathing is determined by chemoreceptors and the brainstem, as modified by a number of subjective sensations. When ventilated, the patient breathes at a rate and tidal volume that is dictated by the machine. Because of dead space, taking deep breaths more slowly (e.g. ten 500 ml breaths per minute) is more effective than taking shallow breaths quickly (e.g. twenty 250 ml breaths per minute). Although the amount of gas per minute is the same (5 L/min), a large proportion of the shallow breaths is dead space, and does not allow oxygen to get into the blood.
Read more about this topic: Dead Space (physiology)
Famous quotes containing the words dead, space and/or patient:
“There are flood and drouth
Over the eyes and in the mouth,
Dead water and dead sand
Contending for the upper hand.
The parched eviscerate soil
Gapes at the vanity of toil,
Laughs without mirth.
This is the death of the earth.”
—T.S. (Thomas Stearns)
“When Paul Bunyan’s loggers roofed an Oregon bunkhouse with shakes, fog was so thick that they shingled forty feet into space before discovering they had passed the last rafter.”
—State of Oregon, U.S. public relief program (1935-1943)
“This life is a hospital in which each patient is obsessed with the desire to change beds.”
—Charles Baudelaire (1821–1867)