Anaesthetic gases used in medical procedures are accumulating in the atmosphere and contributing to climate change. Specifically, concentrations of desflurane, isoflurane, and sevoflurane have been rising globally over the past decade. These gases are potent greenhouse gases, with desflurane having an effect 2500 times stronger than carbon dioxide per kilogram. While the gases make up a small part of total greenhouse emissions, their levels are growing and warrant attention from the healthcare industry.

1. Anaesthetic gases used in ops
up Earth's temp
Their Greenhouse Effect More Potent Than CO2: Study
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2. Contd..
Anaesthetic gases used to carry out smooth surgeries are accumulating in
the Earth's atmosphere, where they are contributing to climate change, a
new study has warned. Over the past decade, concentrations of the
anesthetics desflurane, isoflurane and sevoflurane have been rising globally,
researchers said. Like the well-known climate warmer carbon dioxide,
anaesthesia gases allow the atmosphere to store more energy from the Sun.
But unlike carbon dioxide, the medical gases are extra potent in their
greenhouse-gas effects.
One kilogramme of desflurane, for instance, is equivalent to 2,500
kilogrammes of carbon dioxide in terms of the amount of greenhouse
warming potential, said Martin Vollmer, an atmospheric chemist at the Swiss
Federal Laboratories for Materials Science and Technology in Dubendorf,
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3. “On a kilogramme-per-kilogramme basis, it's so much more potent“
than carbon dioxide, said Vollmer, who led the study .
In a new scientific paper published in the journal Geophysical Research
Letters, Vollmer and his colleagues report the 2014 atmospheric
concentration of desflurane as 0.30 parts per trillion (ppt).
Isoflurane, sevoflurane and ha lothane came in at 0.097 ppt, 0.13 ppt
and 0.0092 ppt, respectively . Carbon dioxide -which hit 400 parts per
million in 2014 -is a billion times more abundant than the most
prevalent of these anaesthetics. The team did not include the common
anaesthesia nitrous oxide in the study because it has many sources
other than anaesthetics.
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4. Researchers obtained their numbers by collecting samples of air from
remote sites in the Northern Hemisphere since 2000, as well as aboard the
icebreaker research vessel Araon during an expedition in the North Pacific in
2012 and at the South Korea Ant arctic station King Sejong in the South
Shetland Islands.
To turn these air samples into their global emissions estimates the data were
combined with a two dimensional computer model of atmospheric transport
and chem istry. Although anaesthetics are small players in overall human
generated greenhouse emissions they are a growing matter of con cern to
many in the health-care in dustry. Anaesthesia gas abun dances are growing
and should not be overlooked, said Yale Universi ty School of Medicine
anesthesiol ogist Jodi Sherman, a reviewer of the paper.
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