Comparison of forceps biopsy and cryobiopsy in bronchoscopically visible pulmonary lesions

ISRCTN ISRCTN97376650
DOI https://doi.org/10.1186/ISRCTN97376650
Secondary identifying numbers N/A
Submission date
01/12/2009
Registration date
19/01/2010
Last edited
29/12/2020
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Cancer
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Not provided at time of registration

Contact information

Dr Juergen Hetzel
Scientific

Department of Internal Medicine II
University of Tuebingen
Otfried-Müller-Str. 10
Tuebingen
72076
Germany

Email juergen.hetzel@med.uni-tuebingen.de

Study information

Study designProspective randomised controlled partially blinded multicentre parallel-group study
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleRandomised prospective controlled study for the comparison of forceps biopsy and cryobiopsy in bronchoscopically visible pulmonary lesions
Study objectivesIn patients with endobronchially tumour suspicious lesions cryobiopsy shows a higher sensitivity than forceps biopsy.
Ethics approval(s)The corresponding ethics committees and the institutional review boards approved the study protocol. All other centres will seek ethics approval before recruiting participants.
Health condition(s) or problem(s) studiedBronchoscopically visible pulmonary lesions
InterventionThis was a prospective, randomised, partially blinded multicentre study. A total of 600 patients with suspected endobronchial tumours were investigated. Patients were randomised either to sampling using forceps or the cryoprobe. After obtaining biopsy samples a blinded histological evaluation was performed. Follow-up occurred until the timepoint a definitive diagnosis was obtained either by the investigated biopsy methods or by an additional diagnostic method. According to the definitive clinical diagnosis sensitivity for malignancy was evaluated. Procedure related factors such as duration of procedure (i.e. biopsy sampling plus haemostatic measures), anaesthetic requirements and also the adverse event rate were recorded. A follow-up to guarantee patients safety was not necessary in this case since the intervention was biopsy sampling for diagnostics purposes.
Intervention typeOther
Primary outcome measureSensitivity of forceps biopsy versus cryobiopsy: The biopsy technique utilised was regarded as successful, when histological confirmation of the diagnosis was achieved at the initial bronchoscopy and matched the final diagnosis. If additional tests, e.g. further bronchoscopies, surgery etc. were needed to establish the tumour diagnosis, the biopsy was regarded as not diagnostic.
Secondary outcome measures1. Bleeding frequency and severity: none/mild (no intervention)/severe (at least one intervention for bleeding control applied)
2. The number of samples taken (per protocol the number of biopsies needed was left to the bronchoscopist's discretion with a suggested maximum limit of four samples)
3. Localisation
4. Classification of tumour into exophytic or submucosal growth
5. Level of difficulty to position the probe (easy, moderate or difficult)
6. Duration of the procedure
7. Historical parameters such as quality and size of the samples
8. Need of additional measures, e.g., immunohistology
9. Bronchoscopy technique (rigid/flexible)
10. Quality of histology
11. Influence of forceps size upon diagnostic yield and sample size
12. Diagnostic yield of forceps biopsy versus cryobiopsy in the whole study population

All assessed intra-/peri-procedural.
Overall study start date01/06/2005
Completion date30/10/2008

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexBoth
Target number of participants600
Total final enrolment593
Key inclusion criteria1. Clinical indication for a biopsy of an endoscopically visible endobronchial lesion suspicious for tumour
2. Aged older than 18 years, either sex
3. Signed declaration of consent
Key exclusion criteria1. Haemorrhagic diathesis/anticoagulation
2. Oxygen saturation under 2 l/min less than 90%
3. Severe underlying cardiac disease (unstable angina pectoris, myocardial infarction in the past month, decompensated cardiac insufficiency)
Date of first enrolment01/06/2005
Date of final enrolment30/10/2008

Locations

Countries of recruitment

  • Germany

Study participating centre

Department of Internal Medicine II
Tuebingen
72076
Germany

Sponsor information

University Clinical Center Tuebingen (Germany) - represented by its management
University/education

c/o Dr Juergen Hetzel
Department of Internal Medicine II
Otfried-Müller-Str. 10
Tübingen
72076
Germany

Website http://www.uni-tuebingen.de/uni/qvr/e-30/m30-01.html
ROR logo "ROR" https://ror.org/00pjgxh97

Funders

Funder type

Industry

ERBE Elektromedizin GmbH (Germany) - provided cryoprobes and 15 € per patient for documentation and additional histological slides

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/03/2012 29/12/2020 Yes No

Editorial Notes

29/12/2020: The following changes have been made:
1. Publication reference added.
2. The final enrolment number has been added from the reference.