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Manometric esophageal catheters with built-in pressure transducers. These catheters include several miniature pressure-to-electrical-signal transducers, avoiding the need of water perfusion. Pressure-transducer manometric esophageal catheters usually include a pH sensor; they are suitable for continuous recording (e.g., 24 hours) of pressure, motility, and pH. These catheters are frequently used in ambulatory esophageal monitoring during gastroesophageal reflux disease investigations.
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