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Type of publication: Journal Article
Type of document: Full Paper

Year: 2020

Authors: Dorn, M; Becher-Deichsel, A; Bockstahler, B; Peham, C; Dupré, G

Title: Pressure-Volume Curve during Capnoperitoneum in Cats.

Source: Animals (Basel). 2020; 10(8):E1408

Authors Vetmeduni Vienna:

Becher-Deichsel Anja
Bockstahler Barbara
Dorn Melissa
Dupré Gilles
Peham Christian

Vetmed Research Units
University Equine Clinic, Clinical Unit of Equine Surgery
University Clinic for Small Animals, Clinical Unit of Obstetrics, Gynaecology and Andrology
University Clinic for Small Animals, Clinical Unit of Small Animal Surgery

Laparoscopy is a growing field in veterinary medicine, although guidelines are lacking. The objective of this study was to evaluate the pressure-volume curve during capnoperitoneum in cats. A total of 59 female cats were scheduled for routine laparoscopy. Pressure and volume data were recorded and processed, and the yield point of the curve was calculated using a method based on a capacitor discharging function. For the remaining 40 cats, a linear-like pressure-volume curve was observed until a yield point with a mean cutoff pressure (COP) of 6.44 ± 1.7 mmHg (SD) (range, 2.72-13.00 mmHg) and a mean cutoff volume (COV) of 387 ± 144.35 mL (SD) (range, 178.84-968.43 mL) was reached. The mean mL/kg CO2 value in cats was 208 ± 34.69 mL/kg (range, 100.00-288.46 mL/kg). The COV correlated with COP and body weight but not with body condition score (BCS). COP correlated only with the COV. This study suggests that feline patients have a pressure-volume curve similar to that of canine patients, and the same pressure limit recommendations can be used for both species. After a yield point of 6.44 mmHg is reached, the increment in volume decreases exponentially as the intra-abdominal pressure (IAP) increases.

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