. Radiography and radio-therapeutics . cending colon visible. (/) 7 Ten hours after the meal.—The large intestine is visible as faras the splenic flexure. ig) Twenty-four hours after the meal.—The large intestine is filled as faras the rectum. These are roughly the times for a barium meal ; when a bismuth salt isused the time given must be proportionately lengthened. There are several variations from the routine which may be employed THE OPAQUE MEAL 327 to suit individual cases, the screening may be greatly prolonged when it isdesirable to make observations on the motility of the sto
. Radiography and radio-therapeutics . cending colon visible. (/) 7 Ten hours after the meal.—The large intestine is visible as faras the splenic flexure. ig) Twenty-four hours after the meal.—The large intestine is filled as faras the rectum. These are roughly the times for a barium meal ; when a bismuth salt isused the time given must be proportionately lengthened. There are several variations from the routine which may be employed THE OPAQUE MEAL 327 to suit individual cases, the screening may be greatly prolonged when it isdesirable to make observations on the motility of the stomach, or in cases ofirritable stomach with or without duodenal ulcer. In pyloric ulcer orcancer of the pylorus valuable observations may be made by the • screenmethod. The radiographic method is of the greatest value when a succession ofplates can be obtained, as the stomach may be observed during the processof filling. Small quantities may be watched passing into the organ andtaking a definite course along the lesser d N^/ N / e \^ N—/ / Fig. 276.—Diagrams to illustrate the stages of the bismuth meal.{a) Stomach immediately after iugestioii of meal. (d) Six hours after. (6) Two hours after meal taken,(c) Four hours afte?. (e) Twenty-four hours after.(/) Forty-eight hours after. According to several American writers there are now two schools : (1)the Continental, basing conclusions on a combination of clinical symptomsand various Kontgenoscopic manifestations of motility ; this is defined asthe indirect method ; and (2) the American, or direct school, basing its con-clusions on the exhibition of the lesion itself. A third school might be referred to, namely, those who for several yearshave based the diagnosis upon the indirect and the direct evidences. Radiolog-ical Divisions of the Stomach.—The normal stomach,as shown by the radiographic method of examination, departs considerablyfrom the appearances shown in text-books on anatomy. The position issomewh
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