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- W2040758839 abstract "Abstract It has been reported that microtransducer-tipped catheters (transducer) produce reliable reproducible measurements which correlate well with water-filled balloon systems. Maximum resting pressure (MRP) and maximum voluntary contraction pressures(MVC) were compared using a standard station pull-through technique in 12 patients. There was a poor correlation for both MRP: microballoon, 115 cmH2O (60–160 cm H2O); transducer 60 (20–110), r = 0.62, P < 0.05, and MVC: microballoon, 202 (60–375); transducer, 175 (60–210), r = 0.42, n.s. To determine whether this was due to radial variation in pressures measured by the transducer, we studied a further 39 patients with both systems. At each station, transducer measurements were made at each of four quadrants. We found better correlation for MRP: microballoon, 100 (40–175); transducer, 66 (34–120), r = 0.72, P < 0.001, and MVC: microballoon, 225 (55–650); transducer, 180 (50–470), r = 0.87, P < 0.001, but a significant radial variation for the transducer where rotation reduced MRP pressure measurements by 21 per cent (0–600 per cent), and MVC 17 per cent (0–76 per cent). Moreover there was a significant difference between anterior and posterior MRP in the upper anal canal, anterior 35 (5–80) versus posterior 25 (10–60), P < 0.05. These results account for the poor correlation between random positioning of the microtransducer-tipped catheter and indicate that radial orientation must be taken into account." @default.
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- W2040758839 date "1988-01-01" @default.
- W2040758839 modified "2023-09-27" @default.
- W2040758839 title "Assessment of microtransducers in anorectal manometry" @default.
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- W2040758839 doi "https://doi.org/10.1002/bjs.1800750115" @default.
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