Clinical Trial of the Cryosa System for the Treatment of Obstructive Sleep Apnea

Not Applicable

Active, not recruiting

• Conditions: Obstructive Sleep Apnea of Adult
• Interventions: Device: Cryosa Procedure

• Registration Number: NCT06008626
• Lead Sponsor: Cryosa, Inc.

Brief Summary

This is a prospective, multicenter, non-randomized single-arm safety and performance study to collect data to evaluate the safety of the Cryosa procedure to treat obstructive sleep apnea (OSA) in patients with moderate to severe OSA. The study will also evaluate the chronic performance of the Cryosa system and collect clinical measures for therapy effectiveness that will be used to demonstrate safety and effectiveness in the next clinical study.

Detailed Description

The study will treat 25 subjects enrolled at up to 10 sites in the United States. Enrollment is competitive but each site will be limited to 15 subjects treated.

Study Timeline

• Study First Submitted: 2023-08-07
• Study First Submitted QC: 2023-08-18
• Study First Posted: 2023-08-23
• Study Start: 2023-09-12
• Status Verified: 2024-08
• Last Update Submitted: 2024-11-25
• Last Update Posted: 2024-11-27
• Primary Completion: 2025-09-29
• Study Completion: 2029-03-31

Recruitment & Eligibility

• Status: ACTIVE_NOT_RECRUITING
• Sex: All
• Target Recruitment: 25

Inclusion Criteria

1. Age 22 - 70 years
2. Likely suffer moderate to severe OSA based on history and physical or have an established diagnosis of moderate to severe OSA (AHI ≥ 15) based on a prior sleep study. PSG will be performed after enrollment, or an acceptable PSG performed within 3 months of enrollment is required, to verify a) AHI ≥ 15 b) mixed and central apneas total ≤ 25% of apneas, and c) SpO2 must be ≥ 70% for ≥ 90% of sleep time for continued eligibility.
3. Not able to use, refuse to use or intolerant of Positive Airway Pressure (PAP) or Mandibular Advancement Device (MAD)
4. BMI of ≤ 40 kg/m2 at enrollment
5. Is geographically stable and in close proximity to the site
6. Able and willing to provide written consent to participate in the study

Exclusion Criteria

1. Contraindication to general anesthesia or in the opinion of the Investigator would not be able to tolerate the procedure, including intubation during the procedure or in response to an adverse event

2. Severe maxillary mandibular insufficiency that in the opinion of the investigator thought to be the primary cause of OSA

3. Obvious severe fixed upper airway obstructions (tumors, polyps, nasal obstruction)

4. Previous surgery within 12 weeks of scheduled procedure performed on the soft tissue of the upper airway (e.g., uvula, soft palate, or tonsils).

5. Oral cancer or non-healing oral wounds

6. Prior sleep surgeries, including tongue base reduction, UPPP and hypoglossal nerve stimulation.

7. History of radiation therapy to neck or upper respiratory tract

8. Surgical resection for cancer or congenital malformations in the larynx, tongue, or throat (with exception of tonsillectomy and/or adenoidectomy)

9. History of cold urticaria

10. History of hospitalization with mechanical ventilation due to COVID-19 per investigator discretion

11. Resistant hypertension defined as a blood pressure that remains above goal despite concurrent use of three antihypertensive agents of different classes taken at maximally tolerated doses

12. Neuromuscular disease or other neurologic deficits (for example multiple sclerosis, muscular dystrophy, Parkinson's disease, transient ischemic attack, epilepsy or cerebrovascular accident)

13. Diagnosis of any moderate to severe congestive obstructive pulmonary disease (COPD)

14. Active, severe pulmonary vascular disease (for example pulmonary arterial hypertension or pulmonary embolism)

15. Untreated, active thyroid disease such as Hashimoto Thyroiditis that may cause angioedema or enlargement of the tongue

16. History of angioedema of the tongue

17. Uncontrolled Diabetes (including Diabetes Mellitus [DM] or Insulin Dependent Diabetes Mellitus [IDDM]) with HbA1c >9.

18. Currently receiving treatment for severe cardiac valvular dysfunction, NYHA Class III or IV heart failure, unstable angina or recent (< 12 months) myocardial infarction or severe cardiac arrhythmias

19. Subjects with bleeding event, known bleeding diathesis, impaired immunity for any reason, or heart attack or stroke within the last 12 months

20. Clinical evidence of severe renal failure (Stage 4 or 5) undergoing dialysis or expected to institute dialysis within 6 months

21. History or current clinical evidence of TIA or stroke or muscular dysfunction

22. Current smoker (≥ 1 pack/day)

23. Presence of occupational shift work or anticipation of shift changes during the next 2 years

24. Subject has sleep hygiene behavior that is likely to interfere with measurement outcomes during PSG and/or HSAT

25. Known active substance use disorder

26. Other severe sleep disorders that in the opinion of the investigator, confound functional assessments of sleepiness such as narcolepsy with cataplexy, severe insomnia/insomnia secondary to chronic pain, PTSD

27. Patients taking any of the following medication that could affect study endpoints:

    benzodiazepines, Z-drugs (zolpidem and eszopiclone) opiates, antipsychotics (neuroleptics), phenothiazines, and prescription stimulants (including Sunosi, Provigil, and Nuvigil)

28. Active psychiatric disease (psychotic illness, major depression, or acute anxiety attacks) which prevents subject's ability to meet study requirements and ability to provide study consent

29. Females who are pregnant or females of childbearing age with intention to become pregnant during the study period (≤ 3 months from treatment date)

30. Any other reason the investigator deems subject is unfit for participation in the study

31. Subject currently participating in other premarket investigational studies unless approved by Sponsor in writing

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Cryosa Procedure	Cryosa Procedure	The purpose of this study is to evaluate the safety and effectiveness of Cryosa System applied to the tongue and soft palate in patients with clinically diagnosed obstructive sleep apnea (OSA).

Primary Outcome Measures

Name	Time	Method
Incidence of Serious Procedure or Device/ Treatment Related Events	First 90 days post-procedure	Safety will be assessed by evaluating all serious procedure- or device/treatment-related events occurring in the first 90 days post-procedure.; Adverse events (AE), both serious and non-serious, related and unrelated, will be collected from all subjects enrolled for the duration of the study.

Secondary Outcome Measures

Name	Time	Method
Patient Reported Outcomes (PRO) Safety Measures - Pain Numeric Scale (NRS)	7 Days, 30 Days, 90 Days, 6 Months, 12 Months, 18 Months and 24 Months Post-procedure	Evaluate oropharyngeal pain metrics after treatment compared to baseline.
Patient Reported Outcomes (PRO) Efficacy Measures - Epworth Sleepiness Survey (ESS)	30 Days, 90 Days, 6 Months, 12 Months, 18 Months and 24 Months Post-procedure	Evaluate change in daytime sleepiness after treatment compared to baseline.
Patient Reported Outcomes (PRO) Efficacy Measures - Functional Outcomes of Sleep Questionnaire (FOSQ)	30 Days, 90 Days, 6 Months, 12 Months, 18 Months and 24 Months Post-procedure	Evaluate the change of impact of daytime sleepiness on activities of daily living after treatment compared to baseline.
Patient Reported Outcomes (PRO) Safety Measures - Eating Assessment Tool (EAT-10)	7 Days, 30 Days, 90 Days, 6 Months, 12 Months, 18 Months and 24 Months Post-procedure	Evaluate change in swallowing metrics after treatment compared to baseline.
Sleep Testing	6 Month Follow-up Visit	Quantify the effect of the Cryosa procedure in reducing the severity of OSA post-procedure by evaluating the change from baseline in the apnea hypopnea index (AHI4) with polysomnography (PSG) testing.

Trial Locations

Locations (5)

Specialty Physician Associates; 🇺🇸 Bethlehem, Pennsylvania, United States

Albany ENT & Allergy Services; 🇺🇸 Albany, New York, United States

University of Miami; 🇺🇸 Miami, Florida, United States

University of Tennessee Health Sciences Center; 🇺🇸 Memphis, Tennessee, United States

University of Pennsylvania; 🇺🇸 Philadelphia, Pennsylvania, United States