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Published on: January 22, 2013
Reproducible Visualization of Peripheral Lung Lesions With Iriscope
Rodríguez Tebar Ana1, Brindel Aurélien2, Bondue Benjamin1
1Department of Pneumology, Hôpital Erasme, Université libre de Bruxelles (ULB), Brussels, Belgium.
Insights
The Iriscope, a novel video-endoscope, effectively visualizes peripheral lung lesions. This reproducible technique accurately identifies malignant patterns like white plaque and obstruction, aiding diagnosis.
Area of Science:
- Pulmonology
- Medical Imaging
- Endoscopy
Background:
- A miniaturized video-endoscope, Iriscope, was developed for direct visualization of peripheral lung nodules.
- Conventional video-bronchoscopes have limitations in reaching these peripheral lesions.
Purpose of the Study:
- To describe the endobronchial appearance of peripheral lung lesions using Iriscope.
- To compare Iriscope findings with final pathologic diagnoses.
- To assess the reproducibility of Iriscope for visualizing peripheral lesions between two independent observers.
Main Methods:
- A multicentric observational study involving 84 patients with peripheral lesions.
- Iriscope was used to visualize the endobronchial aspect of lesions.
- Endobronchial findings were compared to final pathologic diagnoses.
- Reproducibility was assessed through blinded interpretations by two independent observers.
Main Results:
- Malignancy was confirmed in 67 (80%) of 84 patients.
- The most frequent endobronchial patterns were white plaque (54%), obstruction (21%), and extrinsic compression (15%).
- Positive predicted values for malignancy were high: 94% for white plaque, 90% for obstruction, and 100% for extrinsic compression.
Conclusions:
- Iriscope is a reproducible endoscopic technique for visualizing peripheral bronchi.
- Observed patterns like white plaque, obstruction, and extrinsic compression are strongly associated with malignancy.
Background:
Iriscope, a miniaturized video-endoscope, was developed to achieve a direct visualization of peripheral nodules unreachable by conventional video-bronchoscopes. The goals of this study were to describe the endobronchial aspect of peripheral lesions, compare it with the final pathologic diagnosis and assess the reproducibility of Iriscope to visualize the endobronchial aspect of peripheral lesions between two observers.
Methods:
In this multicentric observational study, Iriscope was used to visualize peripheral lesions. The endobronchial aspect was compared with the final pathologic diagnosis. Reproducibility was assessed by comparing the blinded interpretations of video recordings by 2 independent observers for each patient.
Results:
Eighty-four patients with peripheral lesions (24.2 ± 9.8 mm) were included. The final diagnosis confirmed malignancy in 67 (80%) patients. The most frequent endobronchial patterns observed were white plaque (45/84, 54%), obstruction (18/84, 21%) and extrinsic compression (13/84, 15%) with a positive predicted value (PPV) for malignancy of 94%, 90%, and 100%, respectively. The sensitivity and PPV of endoscopy, when any of those 3 patterns were observed, were 73% and 91%, respectively.
Conclusion:
Iriscope is a reproducible technique that allows for the visualization of peripheral bronchi. White plaque, obstruction, and extrinsic compression patterns described by Iriscope are associated with malignancy.
