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J. Votruba

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    MINI 23 - Lung Cancer Risk: Genetic Susceptibility and Airway Biology (ID 135)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Screening and Early Detection
    • Presentations: 1
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      MINI23.08 - Comparison of in Vivo RamanĀ and NIR Spectroscopy and EBUS as Confirmatory Method for Ideal Biopsy Area during Bronchoscopic Navigation (ID 2920)

      16:45 - 18:15  |  Author(s): J. Votruba

      • Abstract
      • Presentation
      • Slides

      Recently, SPNs have become more frequently encountered in bronchology. Therefore, an efficient and reliable method for detecting SPNs based on their morphological characteristics is needed The aim of this study was to compare the diagnostic value of near infrared (NIR) spectroscopy, in vivo Raman spectroscopy and radial endobronchial ultrasound (EBUS) for solitary pulmonary nodule (SPN). Fluoroscopic guidance with transbronchial biopsy and needle biopsy was performed in all patients.

      Between February 2014 and February 2015 we examined 22 male and 29 female patients having a median age of 68 years with positron emission tomography-computed tomography findings of metabolically active SPN between 1, 5 to 3 cm in diameter. We used tree types of point monitoring systems. Fluoroscopic guidance (with guide- sheath) was combined with a radial EBUS. In the case radial EBUS conclusively showed catheter position in the centre of SPN (41 cases) than in-vivo Raman Spectroscopy and NIR spectroscopy probes were placed into the guide sheath in order to gather tissue information. Mean measurement time was less than five minutes after establishing ideal position of guide -sheath. Results of in spectroscopy measurements from both Raman spectroscopy and NIR spectroscopy were obtained as differences between spectral characteristics of normal tissue (same side, different lobe) to SPN tissue.

      The results are expressed as sensitivity of RAMAN spectroscopy and NIR spectroscopy towards EBUS navigated biopsies. Statistical analysis of the results showed comparable very high sensitivities for NIR spectroscopy and Raman spectroscopy in confirmation of SPN tissue. From 41 EBUS positive visualisations of SPN there were 38 conclusive histological findings. Both Raman spectroscopy (positive differences in 38 cases) and NIR spectroscopy (positive differences in 36 cases) showed good performance in tissue discrimination.

      Every confirmatory method brings different information about tissue. EBUS describes volume of the SPN and gives valuable information about the position of catheter in the SPN. Raman spectroscopy and NIR spectroscopy bring information about biochemical/ optical characteristics of the tissues.

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