Experimental investigation of high-energy photon splitting in atomic fields.

Data analysis of an experiment in which photon splitting in atomic fields was observed is presented. The experiment was performed at the tagged photon beam of the ROKK-1M facility at the VEPP-4M collider. In the energy region of 120-450 MeV, statistics of 1.6x10(9) photons incident on the BGO target was collected. About 400 candidate photon-splitting events were reconstructed. Within the attained experimental accuracy, the experimental results are consistent with the calculated exact atomic-field cross section. The predictions obtained in the Born approximation differ significantly from the experimental results.

[Naso-intestinal endoscopic intubation in the complex treatment of postoperative intestinal obstruction]. / Nazointestinal'naia éndoskopicheskaia intubatsiia v kompleksnom lechenii posleoperatsionnoi kishechnoi neprokhodimosti.

The long-tube decompression was used for treatment of 54 selected patients with diagnosis of early postoperative intestinal obstruction. For this purpose a silicon double-lumen wire-guided tube has been endoscopically introduced into the proximal portion of the small intestine. In 40 cases continuous decompression of the small bowel brought about a successful resolution of intestinal obstruction by nonoperative therapy. Failure of the conservative treatment within the first 48 hours after intubation has led to operation in 14 cases. Six patients died in this series (4 patients died of multiple organ failure, 2--of thromboembolism). The study has shown that the method can be successfully used.