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- W2023280389 abstract "Abstract The arterial oxygen saturation was measured by oximetry during the Valsalva and Muller maneuvers in 56 patients. In 12 normal patients the mean resting arterial oxygen saturation was 97.3 per cent (S.D. ± 1.7 per cent). During the strain period (Phase 2) the mean arterial oxygen saturation rose slightly to 97.9 per cent (S.D. ± 2.7 per cent) (p = > 0.001); and after release of the strain pressure it returned to ambient levels (Phase 4), 97.5 per cent (S.D. ± 2.7 per cent) (p = > 0.9). Essentially similar results were obtained in 27 patients with varieties of acquired heart disease. In patients with atrial septal defects (ASD) the mean resting arterial oxygen saturation was 93.0 per cent (S.D. ± 3.5 per cent), and during the strain period the mean arterial saturation rose to 94.3 per cent (S.D. ± 4.5 per cent) (p = The normal mean resting arterial oxygen saturation with the Muller maneuver was 97.6. At the end of the suction period the mean fall in oxygen saturation in normal subjects was 8.7 per cent (S.D. ± 4.1 per cent) (p = The mean resting oxygen saturation in patients with ASD during the Muller maneuver was 97.0 per cent, and the mean fall at the end of the suction period in these patients was 9.5 per cent (S.D. ± 2.8 per cent). These observations showed that: (1) The Valsalva maneuver reduces arterial oxygen saturation in patients with atrial septal defects whose pulse pattern response is normal. (2) The Muller maneuver has no value in the detection of right-to-left shunts at the atrial level, inasmuch as desaturation occurred in all patients irrespective of diagnosis." @default.
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- W2023280389 date "1962-08-01" @default.
- W2023280389 modified "2023-09-23" @default.
- W2023280389 title "Effect of the Valsalva and Müller maneuvers on arterial oxygen saturation in normal subjects and in patients with congenital heart disease" @default.
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- W2023280389 doi "https://doi.org/10.1016/0002-8703(62)90330-7" @default.
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