Cardiac output and other hemodynamic variables in anesthetized dogs undergoing laparotomy because of abdominal neoplasia.
OBJECTIVE
To measure cardiac output and other hemodynamic variables in anesthetized dogs undergoing laparotomy because of abdominal neoplasia.


METHODS
Prospective case series.


METHODS
8 dogs with splenic or hepatic tumors.


METHODS
Dogs were anesthetized and underwent abdominal laparotomy. End-tidal isoflurane concentration, heart rate, arterial blood pressures, cardiac output, arterial pH, blood gas partial pressures, PCV, and plasma total protein concentration were measured at set intervals before, during, and after surgery. Cardiac index, stroke index, and systemic vascular resistance index were calculated.


RESULTS
End-tidal isoflurane concentration was lowest before and after surgery. Heart rate did not change significantly throughout the anesthetic period. Arterial blood pressures and systemic vascular resistance index were highest shortly after surgery began; cardiac index and stroke volume index did not change significantly during surgery but increased significantly after surgery ended.


CONCLUSIONS
Results suggested that in dogs undergoing laparotomy because of abdominal neoplasia, changes in arterial blood pressures were not necessarily indicative of qualitatively similar changes in cardiac index.
Wagner
Ann E
AE
Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Miyake
Yukari
Y
D018685:Anesthetics, Inhalation / Q000008:administration & dosage / Q000097:blood; D000818:Animals; D001784:Blood Gas Analysis / Q000662:veterinary; D001794:Blood Pressure / Q000502:physiology*; D002248:Carbon Monoxide / Q000097:blood; D002302:Cardiac Output / Q000187:drug effects; D006348:Cardiac Surgical Procedures / Q000662:veterinary; D004283:Dog Diseases / Q000601:surgery; D004285:Dogs / Q000502:physiology*; D006339:Heart Rate / Q000187:drug effects* / Q000502:physiology; D006439:Hemodynamics / Q000187:drug effects* / Q000502:physiology; D007530:Isoflurane / Q000008:administration & dosage / Q000097:blood; D007813:Laparotomy / Q000379:methods / Q000662:veterinary*; D008113:Liver Neoplasms / Q000601:surgery / Q000662:veterinary; D011184:Postoperative Period; D011446:Prospective Studies; D013160:Splenic Neoplasms / Q000601:surgery / Q000662:veterinary; D014655:Vascular Resistance / Q000187:drug effects / Q000502:physiology
D018685:Anesthetics, Inhalation; D002248:Carbon Monoxide; D007530:Isoflurane