Please assess the completion status of the following clinical trial:

Trial Title: Clinical Feasibility of a Non-invasive Wearable Acoustic Device for Measuring Air Trapping in COPD

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: OTHER
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion criteria for cases (COPD patients) are:~1. Men or women over 40 years old.~2. Spirometric COPD.~3. A history of smoking at least 20 pack-years.~Exclusion Criteria:~1. Inability to perform lung function testing.~2. Inability to complete the study and return for follow-up visits.~3. Pregnancy.~4. A serious and active heart condition, defined by stable or unstable angina, recent myocardial infarction (within the last 2 years), active or decompensated congestive heart failure or cardiomyopathy.~5. End-stage liver disease.~6. Patients unable to do mild exercise (patients with orthopedic-neurologic problems; patients who have severe heart failure characterized by an ejection fraction of \<20% or by New York Heart Association Class IV disease; patients who should be at complete rest, confined to a bed or chair; or patients for whom physical activity brings on discomfort and for whom symptoms occur at rest).

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: None

Study Arms:
- Cases with Air Trapping (Type: None): 20 COPD patients with lung volumes representing air trapping (RV/TLC and functional residual capacity to TLC \[FRC/TLC\])
- Cases without Air Trapping (Type: None): 20 COPD patients without lung volumes representing air trapping (RV/TLC and functional residual capacity to TLC \[FRC/TLC\])
- Healthy Controls (Type: None): Non COPD patients and non-smokers

Based on this trial design, predict the completion outcome and termination type (if applicable).