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Prospective, Randomised Multicenter Study Comparing the Efficacy of Transbronchial Forceps Biopsy With Cryobiopsy to Diagnose Interstitial Lung Disease. (TRABIS)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: July 9, 2013
Last Update Posted: May 5, 2015
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Boeckeler, Michael, University Hospital Tuebingen
The use of cryoprobes improves the diagnostic yield in transbronchial biopsies compared to forceps biopsies to diagnose an interstitial lung disease

Condition Intervention
Interstitial Lung Disease Procedure: transbronchial lung biopsy

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Investigator)
Primary Purpose: Diagnostic
Official Title: Prospective, Randomised Multicenter Study Comparing Transbronchial Forceps Biopsy With Cryobiopsy in Interstitial Lung Disease

Resource links provided by NLM:

Further study details as provided by Boeckeler, Michael, University Hospital Tuebingen:

Primary Outcome Measures:
  • Diagnostic value of each biopsy procedure. It will be identified, how often biopsy contributed to the final diagnosis. [ Time Frame: 24 months ]

Secondary Outcome Measures:
  • Differences in the final diagnosis [ Time Frame: 24 Months ]

Other Outcome Measures:
  • Bleeding None, Mild degree (suction <= 3min), Moderate (extraction> 3min), Severe (intervention: tamponade, surgery) [ Time Frame: 24 months ]

Estimated Enrollment: 382
Study Start Date: January 2012
Study Completion Date: May 2014
Primary Completion Date: May 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: transbronchial forceps lung biopsy
transbronchial lung biopsy forceps
Procedure: transbronchial lung biopsy
Active Comparator: transbronchail cryo lung biopsy
transbronchial lungbiopsy with cryoprobe
Procedure: transbronchial lung biopsy

Detailed Description:

Endoscopic biopsy currently plays only a minor role for the diagnosis of interstitial lung disease. However, in some cases obtaining lung tissue is necessary to establish a final diagnosis. The current standard procedure is transbronchial forceps biopsy - if not sufficient: surgical lung biopsy. Transbronchial lung biopsy bears essential limitations however:

  • Small tissue sample
  • Limited evaluability of the material caused by forceps-induced crush artifacts

In cryobiopsy the cryoprobe´s tip is being cooled and thereby cools the surrounding tissue to approximately minus 89 degrees Celsius. Subsequently, the frozen probe is retracted with the frozen tissue being attached onto the frozen probe's tip. When applied in the central airways, cryobiopsy proved to deliver large specimens of good quality, which may exceed forceps biopsies in terms of diagnostic yield. Pilot studies on transbronchial cryobiopsy showed that same advantages as seen in the endobronchial use.


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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Clinical indications for biopsy of interstitial lung disease
  2. Age over 18 years
  3. Signed consent

Exclusion Criteria:

  1. Risk of bleeding / ongoing anticoagulation
  2. Oxygen saturation <90% - despite delivery of 2l oxygen / min
  3. Underlying cardiac disease (unstable angina, myocardial infarction during the last month, congestive heart failure)
  4. Pulmonary hypertension, PAP sys> 50mmHg
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01894113

University Hospital Tuebingen
Tuebingen, Germany
Sponsors and Collaborators
University Hospital Tuebingen
Principal Investigator: Jürgen Hetzel, MD University Hospital Tuebingen
  More Information

Responsible Party: Boeckeler, Michael, Dr. med. Michael Böckeler, University Hospital Tuebingen
ClinicalTrials.gov Identifier: NCT01894113     History of Changes
Other Study ID Numbers: TBB2010
First Submitted: July 2, 2013
First Posted: July 9, 2013
Last Update Posted: May 5, 2015
Last Verified: May 2015

Keywords provided by Boeckeler, Michael, University Hospital Tuebingen:
interstitial lung disease
transbronchial biopsy

Additional relevant MeSH terms:
Lung Diseases
Lung Diseases, Interstitial
Respiratory Tract Diseases