A harness for 24-hour pH-monitoring in the dog.

Twenty-four hour pH monitoring is used widely in the field of upper gastrointestinal disease. This technique allows the study of pH profiles in normal subjects and those with esophageal, gastric, or duodenal disease. However, it has not been possible to study ambulatory pH in animals. We have designed and developed a harness to carry a pH recorder that enables 24-hour pH studies to be performed in the dog. We studied pH profiles in 10 dogs. The harness is adaptable and could be used for other long-term physiological measurements.