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Clinical Trial Details — Status: Not yet recruiting

Administrative data

NCT number NCT06434558
Other study ID # 855200
Secondary ID
Status Not yet recruiting
Phase
First received
Last updated
Start date June 2024
Est. completion date August 2030

Study information

Verified date May 2024
Source University of Pennsylvania
Contact Erica R Kent, BS
Phone 215-615-8777
Email erica.kent1@pennmedicine.upenn.edu
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The goal of this observational study is to further evaluate the efficacy and mechanism of action of the Cryosa Procedure, a novel procedure intended to treat obstructive sleep apnea (OSA). The patient population includes participants with OSA who are enrolled in the ARCTIC-3 study and are undergoing the Cryosa Procedure. The main questions we aim to answer are: (1) evaluate predictors of successful treatment with the Cryosa Procedure, which is described in more detail in the ARCTIC-3 protocol (IRB #854182), and (2) evaluate a potential mechanism of action of this novel therapy. We hypothesize that higher baseline quantities of oropharyngeal fat and higher baseline upper airway neurotonic activity will be correlated with a successful reduction in OSA symptom severity as measured by a change in apnea-hypopnea index values. We also hypothesize that responders will have a decrease in oropharyngeal fat, which would indicate the mechanism of action of this novel therapy is a loss in oropharyngeal fat. Participants will be asked to: 1. have an MRI before undergoing the Cryosa Procedure 2. have an ultrasound before the Cryosa Procedure 3. permit the use of pressure-sensing catheters and ultrasound during their drug-induced sleep endoscopy, which is part of the ARCTIC-3 protocol 4. have an MRI after the Cryosa Procedure 5. have an ultrasound after the Cryosa Procedure.


Description:

Previous research has shown there is increased fat at the base of the tongue and other locations of the oropharynx in patients with Obstructive Sleep Apnea (OSA) compared to match control non-OSA patients. Subsequently, Cryosa developed the Cryosa Procedure, which is further detailed in the ARCTIC-3 protocol (IRB #854182). This procedure involves the Cryosa System, a device intended to induce adipose cryolysis, a non-surgical removal of by inducing cell death (apoptosis) with a controlled freezing of the soft tissue, in the upper airway. Whereas the objective of the ARCTIC-3 study is to determine the efficacy and safety of the Cryosa Procedure, the co-primary aims of the ICE-OSA study are to (1) evaluate predictors of successful treatment with the Cryosa Procedure and (2) evaluate a potential mechanism of action of this novel therapy. We hypothesize that (1) higher baseline quantity of oropharyngeal fat and higher baseline upper airway neurotonic activity are correlated with a successful reduction in OSA severity, and (2) responders will have a decrease in quantity of oropharyngeal fat (as measured by post-operation magnetic resonance imaging, MRI). Investigating the mechanisms and predictors of this novel therapy is necessary to inform future clinical trials and patient selection for the Cryosa Procedure. To assess these metrics, the ICE-OSA study utilizes MRI, point-of-care ultrasound (POCUS), and the addition of pharyngeal manometry and ultrasound (US) during drug-induced sleep endoscopy (DISE) for ARCTIC-3 participants. Study Statistics: These prognostic data are going to be collected as part of a small pilot study to inform the upcoming pivotal trial. For this reason, we seek independent variables with large effect sizes to update and enhance patient selection criteria for the future trial. We propose use of Student's t-test for responders/non-responders (responder defined as reduction of AHI by >50%) for the surgical intervention. Our expected ratio of responders to non-responders is 1:1 based on data provided by the study sponsor (unpublished). Our previous data examining tongue fat in MRI demonstrated values of quantity of fat tissue in fatty tongues to be roughly 14,000 mm3 and fat tissue in non-fatty tongues to be roughly 7,000 mm3. Using these parameters, we calculated that 10 subjects total would be required (assuming a standard deviation of 4,000 mm3) to detect significant differences between responders/non-responders with an alpha of 0.05 and a power of 80%.


Recruitment information / eligibility

Status Not yet recruiting
Enrollment 10
Est. completion date August 2030
Est. primary completion date October 2024
Accepts healthy volunteers No
Gender All
Age group N/A and older
Eligibility Inclusion Criteria: - Enrolled in the ARCTIC-3 clinical trial at the University of Pennsylvania* - Provision of signed and dated informed consent form for ICE-OSA Exclusion Criteria: - MRI contraindications (claustrophobia, ferromagnetic implants/foreign bodies, etc.) - Patient is pregnant or becomes pregnant during their enrollment

Study Design


Intervention

Procedure:
Cryosa Procedure
The Cryosa Procedure is part of the ARCTIC-3 protocol (IRB #854182). Therefore, all patients enrolled in this study are expected to undergo the Cryosa Procedure. Undergoing the Cryosa Procedure is not a part of this protocol.

Locations

Country Name City State
United States University of Pennsylvania Philadelphia Pennsylvania

Sponsors (1)

Lead Sponsor Collaborator
University of Pennsylvania

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Change from Baseline in Oropharyngeal Fat at 6 Months Quantity of oropharyngeal fat will be measured with magnetic resonance imaging (MRI) before the Cryosa Procedure and 6 months after the Cryosa Procedure in all subject participants. Baseline and 6 months
Primary Change in Baseline Apnea Hypopnea Index at 6 Months All participants in this study, who are also enrolled in the ARCTIC-3 study, are undergoing a polysomnogram as part of the ARCTIC-3 study at baseline and at 6 months. AHI is measured during these sleep studies in every patient at both timepoints. Baseline and 6 Months
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