Biomedical subjects
Publications and source records attributed to P J Salt.
The effect of ketamine on the uptake of 3H-noradrenaline in the isolated perfused rat heart was studied. A dose-dependent inhibition of uptake by both neuronal and extraneuronal processes was found. These effects may account for the positive chronotropic and pressor effects of the drug.
The analeptic agent, 4-aminopyridine, was given to patients who had undergone elective ear, nose and throat surgery and showed severe central respiratory depression due to intra-operative fentanyl administration. The respiratory depression due to fentanyl was found to be partially antagonised by 4-aminopyridine. In view of these preliminary findings it is suggested that the drug might find a use in combatting postoperative fentanyl-induced respiratory depression.
In healthy volunteers pretreated with atropine (0.5 mg), ketamine given as a bolus i.v. injection (2 mg/kg) followed by an infusion of ketamine (1 mg/kg/hr) for one hour, caused a significant rise in blood pressure and heart rate. This cardiovascular stimulation was rapidly counteracted by diazepam (0.2 mg/kg i.v.) given when the response to ketamine was already maximal.
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