title: Hemodynamic effects of prolonged abdominal insufflation for laparoscopic procedures.
abstract: Abdominal insufflation for laparoscopic procedures leads to numerous hemodynamic effects. We focused on blood flow distribution and arterial and venous pressure changes during CO2 insufflation at an intra-abdominal pressure of 12 mm Hg. Three segments of the vascular system were investigated (intrathoracic, cranial extrathoracic, caudal extrathoracic) in supine animals at insufflation, during a 90-minute period of pneumoperitoneum, and at desufflation. Except for instrumentation of the animals, no further surgery was performed. At insufflation (+5 minutes), cardiac output increased from 2.7 +/- 0.5 to 3.3 +/- 1.1 L/min while heart rate decreased from 138 +/- 26 to 128 +/- 17 beats per minute. Increases in jugular venous (from 6 +/- 1 to 11 +/- 4 mm Hg) and atrial (right, from 7 +/- 1 to 12 +/- 3; left, from 12 +/- 4 to 17 +/- 5 mm Hg) pressures occurred uniformly during inspiration. The great variance in atrial pressures during ventilation was not associated with changes in stroke volume, as the effective transmural filling pressures remained nearly constant. The increase in femoral venous pressure occurring during both inspiration and expiration (from 10 +/- 2 to 18 +/- 4 mm Hg) exceeded the increase in right atrial and jugular venous pressures during inspiration. Parallel increases were noted in arterial pressures (carotid, from 119 +/- 15 to 129 +/- 9; femoral, from 122 +/- 16 to 133 +/- 10 mm Hg), left ventricular pressure (from 133 +/- 17 to 143 +/- 10 mm Hg), and carotid and femoral flow (carotid, from 174 +/- 71 to 195 +/- 70; femoral, from 66 +/- 25 to 73 +/- 40 (NS) mL/min).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Ludwig Boltzmann Institute for Cardiosurgical Research, University of Vienna, Austria.
authors.forename: U
authors.initials: U
authors.lastname: Windberger
authors.forename: H
authors.initials: H
authors.lastname: Siegl
authors.forename: J G
authors.initials: JG
authors.lastname: Ferguson
authors.forename: H
authors.initials: H
authors.lastname: Schima
authors.forename: R
authors.initials: R
authors.lastname: Függer
authors.forename: F
authors.initials: F
authors.lastname: Herbst
authors.forename: M
authors.initials: M
authors.lastname: Schemper
authors.forename: U
authors.initials: U
authors.lastname: Losert
mesh_terms: D000818:Animals; D001794:Blood Pressure; D002245:Carbon Dioxide / Q000097:blood; D002395:Catecholamines / Q000097:blood; D004573:Electrolytes / Q000097:blood; D006339:Heart Rate; D006439:Hemodynamics; D006454:Hemoglobins / Q000032:analysis; D010535:Laparoscopy; D010100:Oxygen / Q000097:blood; D011028:Pneumoperitoneum, Artificial; D013552:Swine; D014655:Vascular Resistance; D014690:Venous Pressure
chemical_list: D002395:Catecholamines; D004573:Electrolytes; D006454:Hemoglobins; D002245:Carbon Dioxide; D010100:Oxygen