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Together with the Blom® Fenestrated Cuffed Tube, the Speech Cannula that has a flap valve and bubble valve allows ventilator-dependent patients to speak regardless of cuff inflation or ventilator manipulation.
During inhalation, the flap valve will open, which allows the bubble valve to expand and seal the fenestration.
Meanwhile, during the exhalation, the flap valve will close, which allows the bubble valve to collapse and unblock the fenestration.
Hence, the air will be directed up through the fenestration to vocal cords.