Vasopressor hormone response following mesenteric traction during major abdominal surgery

• Published in: Acta anaesthesiologica Scandinavica Vol. 42; no. 8; pp. 948 - 956
• Main Authors: Brinkmann, A., Seeling, W., Wolf, C. F., Kneitinger, E., Schonberger, C., Vogt, N., Orend, K. H., Buchler, M., Radermacher, P., Georgieff, M.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-09-1998; Blackwell
• Subjects: Abdomen; Abdomen - surgery; Abdominal surgery; active; Anesthesia, Epidural; Anesthesia, General; Anti-Inflammatory Agents, Non-Steroidal - therapeutic use; Arginine Vasopressin - blood; Biological and medical sciences; Catecholamines - blood; Double-Blind Method; epidural anesthesia; epinephrine; Epoprostenol - blood; Female; hemodynamics; Hemodynamics - physiology; Hormones - blood; Humans; Hypotension - blood; Hypotension - etiology; Hypotension - physiopathology; ibuprofen; Ibuprofen - therapeutic use; Male; Medical sciences; mesenteric traction; Mesentery - physiology; Middle Aged; norepinephrine; Prospective Studies; prostacyclin; renin; Renin - blood; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Surgery of the digestive system; thromboxane; Thromboxane B2 - blood; vasopressin; Prostaglandin I2; Vasopressor agent; 8-Arginine vasopressin; Cardiovascular disease; Traction; Regional anesthesia; Renin; Surgery; Ibuprofen; Complication; Aspartic endopeptidases; Release; Human; Hormone; Enzyme; Thromboxane A2; General anesthesia; Intraoperative; Mesentery; Catecholamine; Abdomen; Peptidases; Arylacetic acid derivatives; Arterial hypotension; Extradural administration; Hydrolases; Hemodynamics
• ISSN: 0001-5172; 1399-6576
• DOI: 10.1111/j.1399-6576.1998.tb05355.x

Background: We investigated the vasopressor hormone response following mesenteric traction (MT) with hypotension due to prostacyclin (PGI2) release in patients undergoing abdominal surgery with a combined general and epidural anesthesia.
Methods: In a prospective, randomized, placebo‐controlled study we administered 400 mg ibuprofen (i.v.) in 42 patients scheduled for abdominal surgery. General anesthesia was combined with epidural anesthesia (T4‐L1). Before as well as 5, 15, 30, 45, and 90 min after MT we recorded plasma osmolality, hemodynamics and measured 6‐keto‐PGFlα (stabile metabolite of PGI2), TXB2 (stabile metabolite of thromboxane A2) active renin, and arginine vasopressin (AVP) plasma concentrations by radioimmunoassay. Catecholamine levels were assessed by high‐pressure liquid chromatography (HPLC) with electrochemical detection.
Results: Following MT, arterial hypotension occurred along with a substantial PGI2 release. This was completely abolished by ibuprofen administration. Although plasma levels of 6‐keto‐PGF1α (1133 (708) vs. 60 (3) ng/L, median (median absolute deviation), P=0.0001, placebo vs. ibuprofen) remained significantly elevated, blood pressure was restored within 30 min after MT in the placebo group. At the same point in time plasma concentrations of TXB2 (164 (87) vs. 58 (1) ng/L, P=0.0001), epinephrine (46 (33) vs. 14 (6) ng/L, P=0.001), AVP (41 ± (18) vs. 12 (7) ng/L, P=0.0004), and active renin (27 (12) vs. 12 (4) ng/L, P = 0.001) were significantly higher in placebo‐treated patients.
Conclusion: Under combined general and epidural anesthesia arterial hypotension following MT due to endogenous PGI2 release is associated with enhanced release of AVP, active renin, epinephrine and thromboxane A2, presumably contributing to hemodynamic stability within 30 min after MT.