Background: Most previous stability studies for norepinephrine have reported the percentage of drug remaining in IV solutions after only 24 h. No previously published study has evaluated the effect of light on the stability of this drug.
This angina, described by Ludwig in 1836, is an acute infection of the floor of the mouth producing marked swelling under the jaw and in the neck. 1 The infection being restricted by theattachment of thedeep cervical fascia to the mandible above and the hyoid bone below, spreads deeply along the submaxillary duct behind the mylo-hyoid muscle and causes great induration of the floor of the mouth.2 A good account is given by Ashurst who states, 'It is an acute inflammatory process involving the cellular tissue of the floor of the mouth and the submaxillary region of one or both sides of the neck. It is the simultaneous involvement of the submaxillary and the sublingual tissues in a confluent septic cellulitis that warrants the condition being recognised as a separate clinical entity'. 3
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