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:
“Pervading my being:
my dead wife’s comb, in the room
as I tread on it.”
—Taniguchi Buson (1715–1783)
“It is the space inside that gives the drum its sound.”
—Hawaiian saying no. 1189, ‘lelo No’Eau, collected, translated, and annotated by Mary Kawena Pukui, Bishop Museum Press, Hawaii (1983)
“For who would bare the whips and scorns of time,
Th’oppressor’s wrong, the proud man’s contumely,
The pangs of disprized love, the law’s delay,
The insolence of office, and the spurns
That patient merit of th’unworthy takes,
When he himself might his quietus make
With a bare bodkin?”
—William Shakespeare (1564–1616)