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Arkiv for kategorien ‘Medicoteknik’

The Iron Lung [da]

fredag den 28. september 2012

A negative pressure ventilator (often referred to colloquially as an iron lung) is a form of medical ventilator that enables a person to breathe when normal muscle control has been lost or the work of breathing exceeds the person's ability. It has been almost entirely superseded by Positive pressure ventilation intubation.

At the height of the polio outbreaks of the 1940s and 1950s iron lungs filled the hospital wards until they were superseded by positive pressure ventilators that works by blowing air into the patient's lungs via intubation through the airway. Positive pressure ventilators were used for the first time in Blegdams Hospital, Copenhagen, Denmark during a polio outbreak in 1952 where it proved a major success and soon superseded the iron lung throughout Europe.

A technician calibrating an iron lung machine
A technician calibrating an iron lung machine

Via articulomortis:

This historic photograph shows a technician calibrating an iron lung machine. These machines were used to keep polio patients alive, enabling them to breathe by creating a negatively-pressurized environment around their bodies after having been sealed inside the machine, with only their head exterior to the confines of the apparatus.

August Krogh analyzing respiratory gas [da]

torsdag den 8. marts 2012

Example of early respiratory apparatus used by August Krogh to analyze respiratory gas. Krogh constructed his own equipment, perfecting the art of glassblowing and other laboratory skills. The Krogh respiratory gas analysis equipment was the most accurate of any developed; this enabled Krogh to conduct crucial experiments that eventually led to decisive experiments and the Nobel Prize in 1920.

August Krogh’s respiratory gas analysis apparatus as shown on the exibition The Chemistry of Life in 2010-2011.