{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T14:53:50Z","timestamp":1770216830604,"version":"3.49.0"},"reference-count":26,"publisher":"American Veterinary Medical Association (AVMA)","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ajvr"],"published-print":{"date-parts":[[2001,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Objective<\/jats:bold>\u2014To evaluate the effect of body position on\nbarrier pressure at the gastroesophageal junction in\nanesthetized Greyhounds and to assess alterations in\nbarrier pressure following gastropexy.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Animals<\/jats:bold>\u20148 adult Greyhounds.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Procedure<\/jats:bold>\u2014Barrier pressure at the gastroesophageal\njunction was measured by fast (1 cm\/s)\nand slow (1 cm\/10 s) withdrawal of a subminiature\nstrain gauge transducer through the gastroesophageal\njunction in 8 anesthetized dogs. The\neffect of body position was measured. Each dog then\nwas placed in right-lateral recumbency, and gastropexy\nwas performed in the left flank. Additional\nmeasurements were obtained 1, 5, 10, 20, and 30\nminutes after gastropexy.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Results<\/jats:bold>\u2014Barrier pressure for dogs positioned in sternal\nrecumbency (mean \u00b1 SEM, 1.1 \u00b1 0.53 mm Hg)\nwas significantly less than for dogs positioned in right\nlateral or left lateral recumbency. Following gastropexy,\nthere was a steady increase in barrier pressure.\nThirty minutes after gastropexy, barrier pressure\nwas significantly higher (13.36 \u00b1 3.46 mm Hg), compared\nwith the value before surgery.<\/jats:p>\n\t\t\t\t<jats:p>\n\t\t\t\t\t<jats:bold>Conclusions and Clinical Relevance<\/jats:bold>\u2014Barrier pressure\nin anesthetized dogs is highly variable and influenced\nby body position. This is most likely the result\nof anatomic interrelationships between the\ndiaphragm, stomach, and terminal portion of the\nesophagus. Gastropexy also increases barrier pressure\nin the immediate postoperative period, which\nmay be clinically relevant in terms of understanding\nhow resolution of gastroesophageal reflux disease\nassociated with hiatal hernia may be affected by gastropexy\ncombined with hernia reduction. 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