AJ PHOTO / SCIENCE PHOTO LIBRARY AJ PHOTO / SCIENCE PHOTO LIBRARY
Anaesthesia. Line being placed into the wrist of a 7-year-old boy to administer anaesthetic liquid prior to an operation. A cannula (pink), a hollow blunt tube, is being inserted into the wrist. A tube, which will carry the drug, will be put in the cannula. The boy has already been made unconscious by the administration of an anaesthetic gas. Anaesthetics induce unconsciousness and so prevent the patient feeling any pain or discomfort during an operation.
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