Transesophageal monitoring of aortic blood flow during nonemergent canine surgeries |
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| Authors: | Piper L Wall DVM PhD DACVECC ; Maisha M Rudison BS ; Tatjana Lazic DVM Dean H Reidesel DVM PhD |
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| Institution: | Iowa Methodist Medical Center, Surgery Education Department and Trauma Research, Des Moines, IA,;Iowa State University, Zoology and Genetics Department, Ames, IA,;Iowa State University College of Veterinary Medicine, Small Animal Clinic, Ames, IA, Institution Where Performed, Iowa State University College of Veterinary Medicine, Small Animal Clinic, Ames, IA, 1415 Woodland Ave, Suite 140, Des Moines, IA 50309, Office telephone (515) 241–4063, Fax: (515) 241–4080, E-mail: |
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| Abstract: | Objective: To establish baseline values for descending thoracic aortic blood flow parameters as determined with a transesophageal combined M‐mode and pulsed Doppler ultrasound‐based monitoring method. Design: Preliminary observational study. Setting: University small animal teaching hospital. Animals: The study population consisted of anesthetized canine patients undergoing nonemergent surgeries. Prospectively set criteria for inclusion were adequate body size for placement of the esophageal probe and a nonemergent reason for surgery. The criterion for exclusion was recent trauma. Interventions: Placement of the transesophageal probe. Measurements and main results: Data was collected during 15 surgeries. Data from three dogs was excluded from data analysis (two recently hit by motor vehicles, one recently having undergone a total hip replacement). Each parameter was stable across time within each individual dog. The ranges of the descending thoracic aortic parameters across the 12 nonemergent cases were as follows: blood flow, 0.038–0.085 L min?1 kg?1; blood flow per beat, 0.31–0.84 mL kg?1; blood acceleration, 6–29 m s2?1; blood peak velocity, 38–105 m s?1; left ventricular ejection time interval 331–492 ms; and diameter, 0.30–0.93 mm kg?1. Conclusions: The range of descending thoracic aortic blood flow parameters encountered in this small group of dogs during nonemergent surgeries was broad; however, each parameter was quite stable across time with little change occurring in any dog during monitoring. |
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| Keywords: | cardiac output cardiovascular dog pulmonary artery catheter ultrasound |
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