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Intramural injection with botulinum toxin significantly elongates the pig esophagus
Heidi Fhær Larsen1, Thorbjørn Søren Rønn Jensen, Lars Rasmussen
1Surgical Department A, Odense University Hospital, Denmark.
Background/Purpose:
Surgical treatment of long-gap esophageal atresia (LGEA) is challenging. Methods which facilitate stretching of the esophageal pouches may allow primary anastomosis. Botulinum toxin type A (BTX-A) blocks acetylcholine release in neuromuscular junctions, thereby causing muscle relaxation. We hypothesized that intramural injections with BTX-A into the esophageal wall of piglets would significantly elongate the tissue upon stretch.
Methods:
Twenty-four piglets were randomized to receive BTX-A of placebo (saline). After one hour, the esophagus was removed en bloc and tested in a stretch-tension device.
Results:
The mean esophageal elongation was 84% (range 83-101) in the BTX-A-group and 65% (50-78) in the control group. The mean difference between the two groups was 18%, which was significant (p < 0.001).
Conclusion:
Intramural injections with botulinum toxin type A elongate the esophagus significantly. Clinically, this could be a potential method to achieve primary anastomosis in LGEA. Additional clinical studies are necessary to evaluate the method before it can be generally recommended.
