Clinical Research Directory

Inclusion Criteria: 1. Male or female subjects 2. 18 years or older 3. Scheduled for open head and neck surgery Exclusion Criteria: 1. Inability or unwillingness of a subject 2. Pregnancy 3. Vulnerable or disadvantaged population (pregnant women, decisionally impaired, homeless, employees, students) 4. Patients with severe medical condition(s) that in the view of the investigator prohibits participation in the study 5. History of adverse reaction to fluorescein including allergy. 6. History of renal failure or chronic kidney disease