Circulatory and Anatomic Differences among Experimental Gastric Tubes as Esophageal Replacement

Abstract

In this experimental study we measured microcirculatory and anatomic differences among a newly developed technique of gastroplasty—fundus rotation gastroplasty (FRG)—and conventional (CG) and reversed (RG) gastric tubes as substitutes for the thoracic and cervical esophagus. After transhiatal esophageal resection, 36 large white pigs were randomly assigned to have an FRG, CG, or RG. Tube length, gastric volume, and compliance as well as blood flow in the tube and the remaining gastric reservoir (by laser Doppler flowmetry) were measured. The FRG tubes were 35.9 ± 3.1 cm long, RG 38.7 ± 3.3 cm, and CG 27.3 ± 2.1 cm ( p < 0.05). Gastric compliance was 20.8 ml in the FRG and 3.2 ml and 2.9 ml in the CG and RG, respectively ( p < 0.001). Blood flow was significantly higher in FRG tubes than in RG tubes or CG tubes, resulting in a lower anastomotic failure rate (2/12 FRG, 6/12 CG, 7/12 RG). Hence a rotation flap of the gastric fundus (FRG) yields a long, well perfused tube by maintaining the blood supply of the gastric lesser curvature. FRG appears to be a good alternative to CG or RG as a substitute for the thoracic and cervical esophagus.