trūFreeze® Spray Cryotherapy Patient Registry

This is a prospective, multi-center registry of patients who are currently undergoing spray cryotherapy using the trūFreeze® device. The registry population consists of patients who are being treated using the spray cryotherapy trūFreeze® device for the removal of unwanted tissue, such as malignant or pre-malignant conditions in the pulmonary or gastrointestinal settings.

Patients eligible to participate in the registry will have disease and treatment specific data collected throughout therapy and long-term follow-up. Subjects will be considered to have completed the registry when data from the 5 year follow-up visit has been collected. The beginning of the follow-up period commences with the first endoscopic treatment session.

Subjects may be withdrawn prior to this for any of the following reasons:

• Death, or
• Lost to Follow-Up, or
• Withdrawal of consent, or
• Discontinuation by the investigator. Three attempts at contact using two different methods are required prior to determination that the subject is lost to follow-up. Attempts at contact must be with certified letters OR documented telephone contact.

The registry will utilize electronic case report forms using a web-based platform housed at the University of North Carolina at Chapel Hill. Access to the database will be limited to individuals involved in the research registry and will require a unique user ID and password. All access to the database and web-based application will be encrypted (HTTPS) and electronic systems compliant with applicable privacy and security regulations. To maintain patient confidentiality, all subjects will be assigned a registry identification number, and this will be the only link between subject identity and treatment information. Read-only access will be provided to any personnel who is not an administrator or responsible for data entry.

All data requested on the case report form must be recorded. All missing data must be explained. The system allows sites to directly enter data electronically, however sites are still responsible for ensuring they have source documents that support all data entered electronically that are separate and verifiable. The registry system will maintain an audit trail that captures when electronic entries are changed, what the change was, and who made the change.

The investigators will ensure the capability for inspections of applicable registry-related facilities (e.g. pharmacy, diagnostic laboratory, etc.). The registry will be monitored by the sponsor, and allow auditing by the Institutional Review Board, government regulatory bodies, and University compliance and quality assurance groups of all registry related documents (e.g. source documents, regulatory documents, data collection instruments, registry data, etc.).

Inclusion criteria

• GI conditions include:

• Barrett's Esophagus (BE) with or without dysplasia
• Squamous dysplasia
• Esophageal cancer, any stage
• Pulmonary conditions include:

• Any endobronchial cancerous or precancerous disease located within the central airways
• Any non-malignant endobronchial process of the central airways that results in abnormal mucosa (i.e. granulation tissue, papillomatosis, sarcoidosis, tuberculosis, etc.)
• Tracheal or bronchial stenosis (malignant or benign)
• Any pleural disease, malignant or benign All subjects are required to be able to provide written informed consent

Exclusion criteria

• Gastrointestinal Exclusion Criteria

• Contraindication to spray cryotherapy.
• Prior treatment with spray cryotherapy. Previous or concurrent treatment using other mucosal therapies such as endoscopic mucosal resection or radiofrequency ablation is acceptable.
• Below 18 years of age
• Pulmonary Exclusion Criteria

• Contraindication to spray cryotherapy.
• Prior treatment with spray cryotherapy. Previous or concurrent treatment using other mucosal therapies is acceptable.
• Tracheoesophageal fistula.
• Bronchopleural fistula.
• Current untreated pneumothorax.
• Clinically significant hypoxia refractory to supplemental oxygen therapy.
• Below 18 years of age