Pressure unit inconsistency in the Medical Measurement Systems ASCII-file

Research output: Contribution to journalComment/debate

1 Citation (Scopus)


Background: To apply novel analysis methods for processing high-resolution pressure-impedance motility parameters, raw data acquired by commercial motility systems are exported and analyzed externally using purposed-designed software. Methods: Data acquired by the Medical Measurement Systems (MMS) motility equipment are exported from MMS in different file formats. Key Results: MMS studies that are exported to ASCII-file format will be in cmH2O units even though acquired and displayed by the MMS system in mmHg units (1 mmHg would be exported as 1.36 cmH2O). Conclusions & Inferences: Due to this issue, investigators may unknowingly generate pressure data in incorrect units, data exported from MMS in ASCII-file format need to be divided by a factor 1.36 to convert cmH2O to mmHg.

Original languageEnglish
Article numbere13927
Number of pages2
JournalNeurogastroenterology and Motility
Issue number1
Early online date6 Jul 2020
Publication statusPublished - Jan 2021


  • data analysis
  • high-resolution manometry
  • motility systems
  • pressure measurement


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