Plasma catecholamine concentrations.

Plasma catecholamine concentrations during surgery in unsupplemented glucocorticoid-treated patients.

Plasma catecholamine (CA) concentrations, mean arterial pressure (MAP) and plasma corticosteroids were measured in fifteen unsupplemented glucocorticoid-treated patients undergoing major surgery. Eight patients had normal and seven patients had reduced plasma corticosteroid concentrations. Changes in plasma CA and MAP during surgery were not related to adrenocortical function. Two patients deve...

Plasma catecholamine concentrations in acute states of stress and trauma.

Plasma Catecholamine Modulation

We measured a2-adrenoreceptor density as well as affinity for and sensitivity to agonist on intact platelets of normotensive and hypertensive subjects before and after physiological increases in plasma catecholamines. In normotensives, posture-induced rises in plasma catecholamines correlated with reduced C2-adrenoreceptor agonist affinity and fewer high affinity state receptors. Platelet aggre...

Effect of blood sampling and shipment to slaughter on plasma catecholamine concentrations in bulls.

The effect of venipuncture on blood serum catecholamine concentrations was studied in five yearling Red Angus bulls. Treatments consisted of sampling jugular vein blood via indwelling cannulas in a squeeze chute every 10 min for 1 h; sampling jugular vein blood from an indwelling catheter before, during and after venipuncture simulation; sampling jugular vein blood by venipuncture in a chute af...

Effect of patient-controlled analgesia on plasma catecholamine, cortisol and glucose concentrations after cholecystectomy.

To quantify the effects of postoperative pain relief on surgical stress response, 16 patients undergoing cholecystectomy were allocated randomly to double-blind treatment with either fentanyl by patient controlled analgesia (PCA) with the Prominject plus saline given s.c. by nurses on demand (PCA group) or saline by the infusion pump plus morphine 10 mg/70 kg s.c. by nurses on demand (control)....