Abstract
Electrical impedance was used to measure the volume of fluid associated with ascites and haemoperitoneum simulated by the infusion of saline and blood, respectively, in dogs. The change in impedance was approximately 1·1 Ω per 100 ml for saline and 0·2 Ω per 100 ml for blood. The technique was applied to measure surgically-induced haemoperitoneum and effusion in a study of the efficacy of two haemostatic agents. Results from this study indicated a significant decrease in impedance associated with tissue oedema and hyperaemia in addition to free fluid in the abdomen.
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