Hood Salivary Bypass Tubes are designed to control salivary leakage from the pharyngocutaneous fistula after total laryngectomy, and to stent the cervical esophagus following dilation of a stricture. Bypass tubes are frequently used in patients with poor wound-healing due to systemic problems (e.g., poor nutritional status, metabolic disorders) or regional factors (e.g., post irradiation changes, recurrent or persistent neoplasm, and chronic infection). Because of these host factors, placement of the tubes may be associated with pressure necrosis of local tissues. Therefore, patients with these tubes in place should be monitored carefully by x-ray and direct inspection if localized pressure necrosis of regional soft tissue is suspected. The tubes are designed to fit securely in the superior esophagus and hypopharynx. However, it is possible for a loose-fitting tube to be displaced distally into the esophagus. This may be prevented by securing the tube to an indwelling gastric tube.

The Hood Intended Use and Instruction Manual, which is supplied with each product, provides detailed information on insertion technique, sterilization, and postoperative care.