. The stomach and sophagus : a radiographic study . Pig. 18. Radiogram of a case of extreme atom in which ib<- lowewl part of the s( ach extended nearly fi below the umbilicus. \ little rood has just been given, and is seen extending from the cardiac orificeto the mass of food in the lowest part. Note how this is held np to someextent in the upper pari by the walls of the stomach being in apposition.(a) air, (b) cardiac orifice, (c) food sliding down, d) a peristaltic waveshowing as a feeble concavity in the shadow, and (e the mass of food inthe lowest part, (x) Fig. 19. Radiogr
. The stomach and sophagus : a radiographic study . Pig. 18. Radiogram of a case of extreme atom in which ib<- lowewl part of the s( ach extended nearly fi below the umbilicus. \ little rood has just been given, and is seen extending from the cardiac orificeto the mass of food in the lowest part. Note how this is held np to someextent in the upper pari by the walls of the stomach being in apposition.(a) air, (b) cardiac orifice, (c) food sliding down, d) a peristaltic waveshowing as a feeble concavity in the shadow, and (e the mass of food inthe lowest part, (x) Fig. 19. Radiogram of an atonic stomach. Pressure has been applied to the abdomen so that the food lias been forced upwards. Thephoto was taken as the food was again taking up it> position in thelower part and shows the distribution of the rugae in parallel linescoinciding with the axis of the stomach. (a] air, tin food held upbetween the collapsed walls and passing down through the rugse to themass of food, (c);- (a) umbilicus. A suspension of bismuth was used toobtain this result. Pyloric obstruction 33 in which the muscle happened to be when the anaesthetic adr-dupon it, and is a mosi unreliable index to the naturalcondition. PYLORIC OBSTRUCTION. Obstruction is a relative term and depends not only on thenarrowing of the canal through which the food has to pass,but on the vis a tergo. These are the two main factors, butwhen the stomach is atonic there is also the static disabilityresulting from the fact that the lowest part, in which the foodcollects, is far below the pylorus. It
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