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Individual response to total spectrum of pain control in dentistry.

Method Following a fully-informed consent from the volunteer, a standard protocol was followed for each pain control investigation to continuously record the mean arterial and central venous pressure and electrocardiogram. Cardiac output was determined by dye dilution technique, total peripheral resistance and stroke volume were calculated and blood gas changes measured following each event in the technique. Following a suitable rest period, subsequent to the placement of intra-arterial and central venous catheters, a supine control was obtained. The volunteer was then placed in the contour dental chair in a semi-supine position and a further control measurement made. Subsequent to the procedure, a final measurement was made when recovery was evidenced by the Bender face-hand test.