tocodynamometer
Pronunciation: toh-ko-dy-na-MOM-eh-ter
External monitoring device that measures uterine contractions by detecting changes in abdominal wall tension during labor.
Full Definition
An external electronic monitoring device used during labor to record uterine contractions by measuring changes in abdominal wall tension. The tocodynamometer (often called a 'toco') uses a pressure-sensitive transducer placed on the maternal abdomen over the uterine fundus. While it can detect the timing and relative strength of contractions, it cannot accurately measure intrauterine pressure intensity, which requires an intrauterine pressure catheter (IUPC). The device is used in conjunction with fetal heart rate monitoring as part of electronic fetal monitoring systems.
Usage
Usage note: Commonly shortened to 'toco' in clinical practice; measures contraction frequency but not intensity.
In Context
- "The tocodynamometer showed regular contractions every 3 minutes but could not measure their intensity." — Labor monitoring note
- "External monitoring with tocodynamometer was initiated upon admission to the labor unit." — Labor admission documentation