Safety and Diagnostic Yield of Cryobiopsy Versus Forceps Biopsy in Endobronchial Lesions:Assiut University Experience
Evaluation of Safety and Diagnostic Yield of Cryobiopsy Versus Forceps Biopsy in Endobronchial Lesions:Assiut University Experience
Panoramica dello studio
Descrizione dettagliata
Flexible bronchoscopy is the diagnostic tool of choice to diagnose endobronchial malignancies. It allows inspection and biopsy of any endobronchial abnormalities under direct vision.
One of the main goals of diagnostic bronchoscopy, besides visualization of endobronchial abnormalities, is obtaining an adequate tissue samples from the suspicious lesions for cytohistological examination. Several techniques could be applied through the working channel of the flexible bronchoscopy such as forceps biopsy, brush, bronchial washing and transbronchial needle aspiration.Flexible bronchoscopy and the associated tissue sampling techniques are the most widespread procedures in the diagnosis of central lung cancer. Even though the specimens are obtained under direct vision, there is a significant failure rate, which therefore, requires repeated bronchoscopies. Concurrent application of different sampling techniques at bronchoscopy has been shown to improve the yield.
Diagnostic bronchoscopy with endobronchial forceps biopsy is primarily practiced in patients with suspected thoracic malignancy and visible endobronchial.
The major drawback of the forceps biopsy technique is the relatively small amount of tissue obtained, which is determined by the size of the forceps. Additionally, mechanical compression or crush artefacts from the instrument tip cause alterations of the tissue samples, which affect the quality of the histological analysis. Flexible cryoprobes were introduced as a new tool for bronchoscopic tissue sampling. It is used primarily for debulking and cryoextraction of malignant airway stenosis.
With this technique, the sample is collected while still being frozen with the tissue attached on the frozen tip of the probe. By this way, larger tissue samples can be taken from endobronchial lesions and artifact free. The molecular markers are also ions. Tissue samples obtained with cryoprobes are of good quality, size better preserved and well represented.
Tipo di studio
Iscrizione (Anticipato)
Fase
- Non applicabile
Contatti e Sedi
Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- 1. Exophytic endobronchial tumor (endoscopically visible lesion)
3.Age>18 years old
Exclusion Criteria:
- 1.Patients, who refused to be included in this study or unfit for flexible bronchoscopy 2.patients with hemorrhagic diathesis (prothrombin concentration <50% and platelet count <80,000/mm 3).
3.Suspected connection of the lesion to large pulmonary blood vessels as seen on chest computed tomography scan
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Diagnostico
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: patients with endobronchial lesions
flexible bronchoscoy will be performed to patients with endobronchial lesions and biopsy from the lesions by forceps and cryoprope will be obtained
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. The cryobiopsy samples will be obtained by advancement of the cryoprobe into the working channel of the bronchoscope to touch the tip of the endobronchial tumor.
The freezing time will be approximately 4 seconds.
Then, flexible bronchoscope together with tissue sample attached to the tip of the frozen probe will be extracted outside the bronchial tree.
The tissue sample will be released from the probe's tip by plunging it into saline at room temperature.
FB will be reintroduced after cryobiopsy to evaluate and control the bleeding.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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. Assess the diagnostic yield and show the feasibility and safety of endobronchial biopsies using the flexible cryoprobe.
Lasso di tempo: 1 year
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size (im millimeter) of biopsy from endobronchial lesion obtained by cryoprobe in comparison to those obtained bu flexible forceps
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1 year
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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complication assessment
Lasso di tempo: 1 year
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Post interventional bleeding classifed into:
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1 year
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Collaboratori e investigatori
Sponsor
Pubblicazioni e link utili
Pubblicazioni generali
- Schreiber G, McCrory DC. Performance characteristics of different modalities for diagnosis of suspected lung cancer: summary of published evidence. Chest. 2003 Jan;123(1 Suppl):115S-128S. doi: 10.1378/chest.123.1_suppl.115s.
- Schumann C, Hetzel J, Babiak AJ, Merk T, Wibmer T, Moller P, Lepper PM, Hetzel M. Cryoprobe biopsy increases the diagnostic yield in endobronchial tumor lesions. J Thorac Cardiovasc Surg. 2010 Aug;140(2):417-21. doi: 10.1016/j.jtcvs.2009.12.028. Epub 2010 Mar 11.
- Babiak A, Hetzel J, Krishna G, Fritz P, Moeller P, Balli T, Hetzel M. Transbronchial cryobiopsy: a new tool for lung biopsies. Respiration. 2009;78(2):203-8. doi: 10.1159/000203987. Epub 2009 Feb 21.
- Aktas Z, Gunay E, Hoca NT, Yilmaz A, Demirag F, Gunay S, Sipit T, Kurt EB. Endobronchial cryobiopsy or forceps biopsy for lung cancer diagnosis. Ann Thorac Med. 2010 Oct;5(4):242-6. doi: 10.4103/1817-1737.69117.
- Dobler CC, Crawford AB. Bronchoscopic diagnosis of endoscopically visible lung malignancies: should cytological examinations be carried out routinely? Intern Med J. 2009 Dec;39(12):806-11. doi: 10.1111/j.1445-5994.2008.01882.x.
- Rivera MP, Detterbeck F, Mehta AC; American College of Chest Physicians. Diagnosis of lung cancer: the guidelines. Chest. 2003 Jan;123(1 Suppl):129S-136S. doi: 10.1378/chest.123.1_suppl.129s.
- Hetzel M, Hetzel J, Schumann C, Marx N, Babiak A. Cryorecanalization: a new approach for the immediate management of acute airway obstruction. J Thorac Cardiovasc Surg. 2004 May;127(5):1427-31. doi: 10.1016/j.jtcvs.2003.12.032.
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Maggiori informazioni
Termini relativi a questo studio
Altri numeri di identificazione dello studio
- cryobiopsy
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