Comparison of Transbronchial, Cryoprobe and VATS Biopsy For the Diagnosis of Interstitial Lung Disease (ILD)

Study Purpose

The objective of this study is to compare the sample size, architectural preservation and diagnostic yield of bronchoscopic cryo-probe transbronchial lung biopsy (C-TBBx) to bronchoscopic standard transbronchial lung biopsy (S-TBBx) and Video-Assisted Thoracoscopic Surgery (VATS) lung biopsy for the diagnosis of interstitial lung disease (ILD).

Recruitment Criteria

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Accepts Healthy Volunteers

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Study Type
Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Subject provides informed consent - Subject is >18 years of age - Subject is scheduled to undergo VATS biopsy for suspected ILD as part of their standard medical care - A negative pregnancy test in women of child-bearing potential - Subject is mentally capable of understanding study procedures

    Exclusion Criteria:

    - Study subject has any disease or condition that interferes with safe completion of the study including: - Platelet count < 50,000 or Coagulopathy defined as an International Normalized Ratio (INR) > 1.5 on the day of procedure, as well as discontinuation of ticagrelor or clopidogrel within 5 days of procedure.
- Severely impaired lung function as determined with spirometry evidenced by a forced expiratory volume in 1 second (FEV1) < 0.8, or radiographically as diffuse bullous disease - Hemodynamic instability with systolic blood pressure <90 mmHg or heart rate > 120 beats/min, unless deemed to be stable with these values by the surgical or interventional pulmonary attending physicians - Hypoxemia with pulse oximetry values <88% or partial pressure of oxygen in arterial blood (PaO2) < 60 on baseline oxygen requirements - Concurrent participation in another study involving investigational drugs or investigational medical devices - Inability to read and understand the necessary study documents

Trial Details

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

Trial ID:

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.


The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Lead Sponsor
Duke University

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator
Momen M Wahidi, MD, MBA
Principal Investigator Affiliation Duke University

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Agency Class
Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Interstitial Lung Disease
Additional Details

This is a prospective cohort study in which 20 subjects that have suspected ILD who are undergoing non-emergent surgical biopsy will be enrolled. Patients who have been referred to the thoracic surgery service for VATS biopsy to diagnose suspected ILD and meet basic inclusion/exclusion criteria will be approached by the study investigators and informed of the study. An informed consent will be obtained during the clinic visit with the thoracic surgeon. At the beginning of the surgical procedure, under general anesthesia in the operating room, patients will undergo flexible bronchoscopy through the endotracheal tube and obtain 10 standard transbronchial biopsies (S-TBBx) and 5 Cryoprobe biopsies (C-TBBx) with fluoroscopic guidance. S-TBBx will be performed using standard biopsy forceps (Boston Scientific, Natick, MA)

  • - 2.0mm diameter.
C-TBBx will be performed using the cryoprobe (ERBE, Tubingen, Germany) -1.9 mm diameter, 78cm in length. This cryoprobe is routinely used in the bronchoscopy suite for other applications such as foreign body removal and local treatment of carcinoma; therefore it is a technique already employed by the interventional pulmonologists who are familiar with its use. Once the biopsies are obtained by the interventional pulmonologist, the thoracic surgeon will perform video-assisted thoracoscopic biopsy (VATS) biopsy. Following their procedure, subjects will be monitored in the post-anesthesia care unit as per standard of care. As part of their ongoing follow-up care, all subjects will be monitored for any adverse events that may have resulted from either the surgical or bronchoscopic procedure, specifically bleeding or pneumothorax. All biopsy samples will be analyzed by a specialist in pulmonary pathology. The number and size of all biopsies, architectural preservation of the airways/alveoli, and pathological diagnosis will be reported by the pathologist. Diagnostic yield will be calculated for each biopsy technique and compared.

Contact a Trial Team

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Duke University Medical Center, Durham, North Carolina




Duke University Medical Center

Durham, North Carolina, 27705

Site Contact

Kathleen Coles, RRT


Terms of Service

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