OBJECTIVES: To develop an experimental model to assess the @entity551 ( @entity551 ) of the digestive tract using photoplethysmography. MATERIALS AND METHODS: Twenty-two mongrel @entity235 were used. Progressive external compression was applied to the intestinal wall and the @entity551 was assessed with photoplethysmography. The study group was divided into two groups. In group 1 @entity551 was measured at the levels of the stomach, duodenum, jejunum and transverse colon. In group 2 @entity551 was measured after temporary occlusion of the truncal and marginal circulation of the jejunum to provide further variables. RESULTS: The @entity551 decreased significantly for each successive distal section. Correlation coefficients and indices for @entity551 and mean arterial pressures were statistically significant (p < 0.005). @entity432 provoked a drop in @entity551 whereas @entity432 scarcely modified the basal results. CONCLUSIONS: Photoplethysmography, through measurements of the residual arterial wave amplitude, is a valid method of determining quantitatively the @entity551 of the digestive tract and could be useful in a clinical environment.

Use of photoplethysmography to determine gastrointestinal perfusion pressure: an experimental XXXX model.

@entity235 :: ('9615', 'Species') :: ['dogs'] @entity551 :: ('MESH:D007022', 'Disease') :: ['PPP', 'parietal perfusion pressure'] @entity432 :: ('MESH:D001157', 'Disease') :: ['marginal occlusion', 'Truncal occlusion']
@entity235 :: (9615,Species) :: ['canine']
