Sewer gases can also be a boon in surgery

March 25th, 2008 - 4:11 pm ICT by admin  

Washington, March 25 (IANS) Hydrogen sulphide, whose presence one associates with the smell of rotten eggs, is not only known to kill workers in sewers, but also improve chances of survival in lower doses. Previous investigations showed that the gas lowered body temperature and metabolic rate and also improved survival of mice when traumatic injury restricted oxygen supply.

But since hypothermia itself cuts metabolic needs, it was unclear whether the reduced body temperature was responsible for the other observed effects.

The current study was designed to investigate both that question and the effects of hydrogen sulphide inhalation on the cardiovascular system.

Researchers measured factors such as heart rate, blood pressure, body temperature, respiration and physical activity in normal mice exposed to low-dose (80 parts per million PPM) hydrogen sulphide for several hours.

They analysed cardiac function with electrocardiograms and echocardiography and measured blood gas levels. While some mice were studied at room temperature, others were kept in a warm environment - about 98

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