SIZING OF OESOPHAGEAL INNER DIAMETER
The patient is positioned in the left lateral decubitus position and vital sign monitoring equipment connected in the usual manner. Intravenous sedation is administered.
Oesophagoscopy is performed with identification of the top of the intestinal metaplasia and the top of the gastric folds. The distance from the bite-block to each of these anatomic landmarks is recorded, and the total length of intestinal metaplasia calculated from these measurements.
The Barrett's Oesophagus tissue is irrigated with plain water. A guidewire is placed and the endoscope removed.
The HALO360 Sizing balloon is introduced over the guidewire and positioned 10 cm above the top of the gastric folds, using the measurement markings on the catheter shaft.
The balloon is automatically inflated with the energy generator, and the displayed inner diameter measurement is recorded.
The measurement step is repeated in 1 cm increments moving distally until an increase in the size is observed, indicating that the balloon has entered the gastric cardia. The sizing balloon is removed.
Using the inner diameter measurements as a reference, an appropriately sized ablation catheter is selected.