Early findings identified the need to update the design of the study device.

The purpose of this study is to assess the safety and effectiveness of the Peregrine endoscope in patients in the office setting in terms of access into and visualization of the paranasal sinus anatomy, image quality, patient tolerability and clinical utility. Up to 30 participants who have had prior endoscopic sinus surgery (ESS) and are scheduled for nasal endoscopy in the office as part of a routine post-operative office visit or due to recurrence of symptoms, will be evaluated with the Peregrine Endoscope as well as a standard endoscope. This study aims to:

• compare visualization success rates of the paranasal sinus anatomy by Peregrine and by a standard endoscope used in the office setting.
• examine device related adverse events.
• assess the adequacy of the image quality of Peregrine for endoscopy procedures in the office.
• evaluate patient tolerability and pain

Nasal endoscopy is a minimally invasive, diagnostic medical procedure and currently the most preferred initial method of evaluating medical problems affecting nose and sinuses such as nasal stuffiness and obstruction, sinusitis, nasal polyposis, nasal tumors, epistaxis, recurrent bouts of sneezing and rhinorrhea. Overall, the procedure is considered very safe and low-risk. Currently, nasal endoscopy can be performed with a flexible or rigid endoscope, typically after a topical decongestant and anesthetic are applied to the nasal mucosa.

Reprocessing is an issue of concern, especially for flexible endoscopes where multiple steps were confirmed to be critical for reprocessing to be effective. High-level disinfection has been determined to be the minimum level of disinfection required, which involves multiple steps including manual cleaning, leak testing, cleaning with an enzymatic agent, high-level disinfection, and drying with vertical storage. 3NT Medical Ltd. has developed the Peregrine Drivable Ear Nose and Throat (ENT) Scope, which offers the convenience of a single-use endoscope component coupled with performance characteristics of commercially available state-of-the-art reusable endoscopy systems. The single-use endoscope essentially removes concerns related to burdensome reprocessing techniques of a delicate tool required to achieve high-level of its disinfection.

The objective of this study is to assess the safety and performance of the Peregrine endoscope in patients in the office setting in terms of access and visualization of the paranasal sinus anatomy, image quality, and patient tolerability and pain. For this study, up to 30 patients who have had prior endoscopic sinus surgery (ESS) and who are scheduled for nasal endoscopy in the office, as part of a routine post-operative office visit or due to recurrence of symptoms, will be evaluated with Peregrine Endoscope. Access and visualization by an additional standard endoscope will be conducted and compared to Peregrine endoscope. Image quality of the Peregrine endoscope, participant tolerability and pain, and the impact of Peregrine on clinical decision making will be evaluated.

Inclusion Criteria:

• A male or female patient who has had prior ESS and who is indicated for office endoscopy by the ENT specialist
• A patient who is able to understand the requirements of the study, is willing to comply with its instructions and schedules, and agrees to sign the informed consent form

Exclusion Criteria:

• Any medical disorder which in the investigator's judgment contraindicates the patient's participation
• Pregnancy

All individual participant data collected during the trial and after deidentification will be available for sharing.

Data will be available for sharing immediately following the embargo period associated with publication.

Data will be available for sharing with primary investigators at academic institutions for the purposes of meta-analysis or nested studies with agreed publication plan. Data can be requested by contacting the study team and completing a data sharing agreement.

Information on adverse events was collected beginning at the start of the procedure through the follow-up telephone call which occurred up to 2 weeks and 3 days after the procedure.