Go to chapter: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39
Chapter 12 (page 49)
It is concluded that the pyloric aperture was open at rest in 52 of 100 normal subjects. Its
diameter, as measured on the films, varied from a minimum of 4.0 mm to a maximum of
10.0mm in different subjects.
In the remaining 48 subjects some delay or hold-up occurred at the pyloric ring. In the
majority of these the hold-up lasted from 40 to 90 seconds; in a few the hold-up was
longer, lasting from 90 seconds to 3 minutes. In this latter subgroup the delay at the
pylorus was associated with hypotonicity or sagging of the greater curvature of the
stomach. Tilting the table by 45 degrees and turning the patient into the left anterior
oblique position, caused immediate gastric emptying in the absence of radiologically
visible contractions. It is concluded that visible contractions are not necessary for
emptying of liquid barium in this position.
It appears that the delay in emptying in these 48 subjects was either due to hypotonicity
of the gastric musculature (Chap. l9), or to closure of the pyloric aperture.
Different types of closure of the aperture may occur (Chap. 13); in the present
cases the pyloric sphincteric cylinder was expanded, and the radiological features suggest
that closure of the aperture was due to converging or spiral (iris-like) gastric mucosal folds (Chap. 13).
- Andersson S, Grossman MI. Profile of pH, pressure and potential difference at
gastroduodenal junction in man. Gastroenterology l965, 49, 364-371.
- Atkinson M, Edwards DAW, Honour AJ, et al. Comparison of cardiac and
pyloric sphincters. Lancet l957, 273, 918-922.
- Brink BM, Schlegel JF, Code CF. The pressure profile of the gastroduodenal
junctional zone in dogs. Gut l965, 6, 163-171.
- Fisher RS, Cohen S. Physiological characteristics of the human pyloric sphincter.
Gastroenterology l973, 64, 67-75.
- Gaffney PR, Gleeson DJ, Hall JW, et al. The manometric findings at the human
pylorus: the evidence against the presence of a tonic sphincter. Scand J
Gastroenterol l987, 22, 525-532.
- Isenberg JI, Csendes A. Effect of octapeptide of cholecystokinin on canine
pyloric pressure. Amer J Physiol l972, 222, 428-431.
- Kaye MD, Mehta SJ, Showalter JP. Manometric studies of the human pylorus.
Gastroenterology l976, 70, 477-480.
- McShane AJ, O'Morain C, Lennon JR, et al. Atraumatic non-distorting pyloric
sphincter pressure studies. Gut l980, 21, 826-828.
- White CM, Poxon V, Alexander-Williams J. A study of motility of normal
human gastroduodenal region. Dig Dis Sci l98l, 26, 609-617.
Previous Page | Table of Contents | Next Page
© Copyright PLiG 1998