FIELD: medicine. SUBSTANCE: method involves examining a patient using transcutaneous ultrasonic transducer in B-mode without special preparation being required. Stomach or duodenum wall infiltration being detected as a thickening with reduced echogenicity, continuous scanning of the given area is carried out from distal to proximal edge of the plane set in perpendicular to the long axis of the organ. Ulceration defect is detected as highly echogenous pointed conic formation with defect fundus being localized at the level of serous membrane of the stomach as cone apex and no visualization of stomach wall in the vicinity of the ulcer defect fundus being cone apex. Transverse diameter of the ulcer defect is measured as length of the high echogenicity cone base and defect depth as cone height. Then, the transducer is rotated by 90 deg to direct it in parallel to the long axis of the organ. Longitudinal diameter is measured as length of the high echogenicity cone base and distance from defect center to the nearest anatomical constrictor being pylorus or cardia. Encapsulated inhomogeneous liquid being found in the vicinity of the ulcer in the abdominal cavity in small quantity, covered perforation is diagnosed. Gas and free liquid being found in the abdominal cavity, ulcer perforation into the free abdominal cavity is diagnosed. EFFECT: high accuracy of diagnosis.
