What equipment is required to perform endobronchial ultrasound (EBUS)?

Updated: Apr 24, 2019
  • Author: Narayan Neupane, MD; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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RP-EBUS probe

The RP-EBUS probe has an ultrasound processor and a balloon catheter attached to it. The balloon is fixed at the tip of the probe. If overinflation or excessive pressure occurs, the balloon slips from the tip and a small amount of water is released from the balloon to prevent balloon rupture. The 20 MHz miniature radial probe is the standard probe. The 30 MHz miniature radial probe provides a more detailed image of the airway wall and surrounding structures. These 2 probes have a diameter of 2.5 mm; therefore, a flexible bronchoscope with a working channel of 2.8 mm is required to use it. The 20 MHz ultra-miniature radial probe has a smaller diameter than either miniature radial probe, so it can be inserted through the 2 mm working channel of a bronchoscope and can extend further into subsegmental bronchi than the miniature radial probe.

CP-EBUS bronchoscope

The CP-EBUS bronchoscope has a linear curved-array ultrasonic transducer of 7.5 MHz at the distal tip, which has the capability of displaying B-mode and color Doppler mode. [29]

The field of view is 80 degrees, and the direction of view is 35 degrees forward oblique. The outer diameter of the bronchoscope is 6.2 mm, and the inner channel diameter is 2 mm. The dedicated 22-gauge needle has an echogenic dimpled tip to enhance visibility by ultrasound. The maximum extruding stroke is 40 mm with a safety mechanism that stops at 20 mm. The needle has an internal sheath that prevents contamination of samples by bronchial wall tissue.

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