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Evaluation of a new method for abdominal compression for use in esophageal investigation


, : Evaluation of a new method for abdominal compression for use in esophageal investigation. Scandinavian Journal of Gastroenterology 17(2): 269-272

The use of conventional extra-abdominal compression with a constant cuff pressure was shown to give various pressures intra-abdominally in different subjects. A feedback system was therefore used, in which the extra-abdominal pressure is controlled by the intra-abdominal pressure. For an intra-abdominal pressure increase of 15 mm Hg, the external cuff pressure in 20 subjects varied from 21 to 98 mm Hg. There was an almost linear relationship between increased intra-abdominal pressure and cuff pressure. The extra-abdominal pressure required to obtain a certain intra-abdominal pressure also varied with the size of the cuff. To obtain relevant and comparable results in studies of hiatal incompetence and gastroesophageal reflux, the feedback system is recommended and the size of the intra-abdominal cuff should be stated.

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Kennedy, R. A.; Williams, L. E., 1977: Effects of different killing techniques on early labeled photosynthetic products in C4 plants. The choice of leaf-killing technique had significant effects on the distribution of label among early labelled photosynthetic products in maize. The major effect of these procedures was on the amount of amino acids present, particulary alanine, an...

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