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Comparison of lower oesophageal sphincter pressure measurement using circumferential vs unidirectional transducers
Author(s) -
Pursnani K. G.,
Oeffner C.,
Gideon R. M.,
Castell D. O.
Publication year - 1997
Publication title -
neurogastroenterology and motility
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.489
H-Index - 105
eISSN - 1365-2982
pISSN - 1350-1925
DOI - 10.1046/j.1365-2982.1997.d01-40.x
Subject(s) - supine position , transducer , linear correlation , nuclear medicine , esophageal sphincter , mathematics , significant difference , medicine , materials science , biomedical engineering , acoustics , physics , surgery , statistics , disease , reflux
Average values from unidirectional (UND) transducers have traditionally been used in standard manometric evaluation of lower oesophageal sphincter pressures (LOSPs). A single circumferential (CMF) transducer has recently become popular. Our aim was to compare LOSP measurements made using the two techniques. Ten healthy volunteers were intubated with a Konigsberg manometry catheter containing five solid‐state transducers (four unidirectional at 90° angles radially and 2.5‐cm intervals and one circumferential, 3 cm distal). LOSP was measured using the station pull‐through technique in the supine and upright positions with Synectics Polygram software for computerized analysis. Mean UND pressures were plotted against CMF pressures and a linear regression and correlation analysis was performed. A similar analysis was done for LOS length. A significant difference (P < 0.01) was found between mean (±SE) supine and upright LOSPs for both mean UND (20.21 ± 1.36 vs 15.56 ± 1.28 mmHg) and CMF (20.41 ± 1.96 vs 16.17 ± 1.61 mmHg); however no difference was shown between supine and upright lengths. There was a high degree of correlation between LOSP (r = 0.83) and a weaker correlation (r = 0.65) between LOS lengths when measured by CMF and UND transducers. Conclusion: UND and CMF transducers provide identical measurements when evaluating the LOS.