Document Detail


Gastric Yield Pressure and Gastric Yield Volume to Assess Anti-Reflux Barrier in a Porcine Model.
MedLine Citation:
PMID:  23273175     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT Anti-reflux barrier (ARB) resistance may be useful to test new treatments for gastroesophageal reflux (GER). The ARB has been estimated by increasing gastric yield pressure (GYP) and gastric yield volume (GYV) in animal models but has not been validated. This study aimed to develop an experimental model suitable for assessing the ARB resistance to increasing intragastric pressure and volume and its reproducibility in a seven-day interval. Ten two-month-old female Large-White swine were studied. Intragastric pressure and volume were recorded using a digital system connected to a Foley catheter inserted through gastrostomy into the stomach. GYP and GYV were defined as the gastric pressure and volume able to yield gastric contents into the esophagus detected by esophageal pH. A sudden pH drop below 3 sustained during 5 min was considered diagnostic for gastric yield. Animals were studied again after seven days. On days 0 and 7, there were no significant differences for GYP (mean ± SD = 7.66 ± 3.02 mmHg vs. 7.07 ± 3.54 mmHg, p = .686) and GYV (636.70 ± 216.74 ml vs. 608.30 ± 276.66 ml; p = .299), respectively. Concordance correlation coefficient (ρ(c)) was significant for GYP (ρ(c) = 0.634, 95% CI = 0.141-0.829, p = .006), but not for GYV (ρ(c) = 0.291, 95% CI = -0.118 to 0.774, p = .196). This study demonstrated an experimental model, assessing the ARB resistance. GYP seems to be a more reliable parameter than GYV for assessment of ARB resistance.
Authors:
Marcos E S Duarte; Carmen P F Freitag; Fernando Fornari; Cleber R P Kruel; Paulo R S Sanches; Paulo R O Thomé; Sidia M Callegari-Jacques; Roseli O Möllerke; Yvone A M V A Vicente; Helena A S Goldani; Sérgio G S Barros
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-28
Journal Detail:
Title:  Journal of investigative surgery : the official journal of the Academy of Surgical Research     Volume:  -     ISSN:  1521-0553     ISO Abbreviation:  J Invest Surg     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809255     Medline TA:  J Invest Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Programa de Pós-graduação Ciências em Gastroenterologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre , Brazil.
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