Repeat Treatment With Metered Cryospray in Patients With Chronic Obstructive Pulmonary Disease With Chronic Bronchitis (MCSRETREAT)

This study is being conducted to determine the safety of repeat metered cryospray (MCS) treatment in patients with COPD with chronic bronchitis previously treated with MCS.

Study Overview

• Status: Not yet recruiting
• Conditions: Chronic Bronchitis; COPD (Chronic Obstructive Pulmonary Disease)
• Intervention / Treatment: Device: Metered cryospray (MCS)

Detailed Description

This study is being conducted to determine the safety of repeat metered cryospray (MCS) treatment in patients with COPD with chronic bronchitis previously treated with MCS.

This is an open-label study. Eligible subjects will have previously completed the SPRAYCB study (NCT03893370). Subjects will receive 2 sessions of bronchial metered cryospray using RejuvenAir® System. Each session will be separated by approximately 30-45 days. Subjects will be followed at 3-month and at 6-months post second procedure.

• Study Type: Interventional
• Enrollment (Estimated): 10
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Subject has completed a previous MCS study, including both treatments (treatment day 1 and treatment day 2)
2. Males and females <80 years of age
3. Subject is able to read, understand, and sign a written informed consent form in order to participate in the study
4. Subject has a diagnosis of chronic obstructive pulmonary disease (COPD) with chronic bronchitis (CB) for a minimum of two years. (CB is defined clinically as chronic productive cough for 3 months in each of 2 successive years in a patient in whom other causes of productive cough have been excluded)
5. Subject is classified as having a moderate or severe (GOLD 2/3) airflow obstruction defined by a post-bronchodilator of >30% FEV1 to <80% predicted with a baseline FEV1/FVC of <0.70
6. Subject is being treated according to current medically accepted treatment guidelines for CB for minimum of 3 months prior to enrollment into the study.
7. Non-smoking for a minimum of 2 months prior to consent and agrees to continue not smoking for the duration of the study
8. Subject is able to adhere to and undergo 2 bronchoscopic procedures per hospital guidelines

Exclusion Criteria:

1. Subject has had an acute pulmonary infection, exacerbation or pneumonia requiring medical treatment (with antibiotics and/or steroids) within 4 weeks prior of initially planned study bronchoscopy
2. Subject has other origins of respiratory disease aside from CB and COPD
3. Subject is using e-cigarettes, vaping or inhaled substances not prescribed by a physician
4. Subject has untreatable or life-threatening arrhythmias, inability to adequately oxygenate during the bronchoscopy, or has acute respiratory failure
5. Subject has bullous emphysema characterized as large bullae >30 millimeters on High Resolution Computed Tomography (HRCT); or subject has stenosis in the tracheobronchial system, tracheobronchomegaly, trachea-bronchomalacia, amyloidosis or cystic fibrosis
6. Subject has clinically significant bronchiectasis as determined by the investigator
7. Subject has had a solid organ transplant procedure
8. Subject has a known mucosal tear, has undergone prior lung surgery such as pneumonectomy, lobectomy, bullectomy, or lung volume reduction surgery
9. Subject has had a prior lung device procedure, including emphysema stent(s) implanted, lung coils, valves, lung denervation, bronchial thermoplasty, cryotherapy or other therapies
10. Subject is unable to temporarily discontinue use of anticoagulant therapy: warfarin, Coumadin, LMWH, heparin, clopidrogel (or equal)
11. Subject is unable to complete patient reported outcome questionnaires due to cognitive impairment, previous cerebral infarct e.g. stroke, TIA
12. Subject has a serious medical condition, such as: uncontrolled coagulopathy or bleeding disorder, uncontrolled congestive heart failure, uncontrolled angina, myocardial infarction in the past year, renal failure, liver disease, cerebrovascular accident within the past 6 months, uncontrolled diabetes, uncontrolled hypertension or uncontrolled gastric reflux
13. Subject is pregnant, nursing, or planning to get pregnant during study duration
14. Subject has or is receiving chemotherapy or active radiation therapy within the past 6 months or is expected to receive chemotherapy during participation in this study
15. Subject is or has been in another treatment study within 6 weeks of enrollment and agrees to not participate in any other treatment studies for the duration of study participation
16. Subject has known sensitivity to medication required to perform bronchoscopy (such as lidocaine, atropine, and benzodiazepines)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Metered cryospray (MCS) using the RejuvenAir® System	Device: Metered cryospray (MCS); Bronchial metered cryospray (MCS)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Completed MCS treatment applications	Completed MCS treatment applications at Treatment 1 and Treatment 2 defined as > or = to 80% of fully delivered MCS applications at each procedure. [Percent of full vs. total applications at each procedure].	Treatment 1 and Treatment 2

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The number of serious device-related adverse events	The number of serious device-related adverse events [Total events within 30 days of Treatment 1 and Treatment 2 ]	Total events within 30 days of Treatment 1 and Treatment 2
The number of serious procedure-related adverse events	The number of serious procedure-related adverse events [Total events within 30 days of Treatment 1 and Treatment 2 ]	Total events within 30 days of Treatment 1 and Treatment 2
Patient reported outcome measures using SGRQ Total Score	Patient reported outcome measures using SGRQ Total Score, [Time Frame: 6-months post treatment relative to baseline ]. SGRQ scores are continuous values ranging from 0 (no symptoms) to 100 (severe symptoms). A reduction in score indicates an improvement.	Time Frame: 6-months post treatment relative to baseline
Patient reported outcome measures using CAT Total Score	Patient reported outcome measures using CAT Total Score, [Time Frame: 6-months post treatment relative to baseline ]. It provides a standardized score (0-40). A reduction in score indicates an improvement.	Time Frame: 6-months post treatment relative to baseline

Collaborators and Investigators

• Sponsor: CSA Medical, Inc.

Study record dates

Study Major Dates

• Study Start (Estimated): May 1, 2026
• Primary Completion (Estimated): December 31, 2026
• Study Completion (Estimated): May 1, 2027

Study Registration Dates

• First Submitted: March 9, 2026
• First Submitted That Met QC Criteria: March 9, 2026
• First Posted (Actual): March 12, 2026

Study Record Updates

• Last Update Posted (Actual): March 18, 2026
• Last Update Submitted That Met QC Criteria: March 16, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Keywords: COPD; Chronic Obstructive Pulmonary Disease; Chronic Bronchitis; Cryospray; CB; Metered Cryospray; RejuvenAir System
• Additional Relevant MeSH Terms: Pathologic Processes; Chronic Disease; Disease Attributes; Respiratory Tract Infections; Infections; Respiratory Tract Diseases; Lung Diseases; Bronchial Diseases; Lung Diseases, Obstructive; Bronchitis; Pathological Conditions, Signs and Symptoms; Pulmonary Disease, Chronic Obstructive; Bronchitis, Chronic
• Other Study ID Numbers: 032

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED
• IPD Plan Description: There is no plan at this time.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes