Adding Quality of Life to Airway Management

Endobronchial Watanabe Spigots

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EWS® — Silicone spigots for segmental and subsegmental bronchi

Endobronchial Watanabe Spigots (EWS®) were developed by NOVATECH in close cooperation with Dr. Y. Watanabe, Okayama, Japan. They are made of implant-grade silicone (implantable for more than 29 days), radio-opaque, sterile and blister-packed (3 EWS per blister).


For re-expansion of the lung in case of:

  • inoperable pneumothorax
  • bronchio-pleural fistula with a continuous loss of air and collapse of the lung despite thoracic suction drain, when surgical intervention is not indicated
  • continuous bleeding from a subsegmental or segmental bronchus).

A study performed in Japan with 63 patients including 40 cases of intractable pneumothorax, 12 cases of pyothorax with fistula and 7 cases of pulmonary fistula has shown that using EWS® is safer and has more permanent results than conventional methods.

After determination of the affected bronchi with a balloon catheter (alternatively X-ray etc.), the EWS® are placed with a flexible bronchoscope and forceps guided by the working tube of the bronchoscope. The use of EWS® was successful in 96.7% of the cases.

The loss of air was stopped or significantly reduced in 77.6% of the cases. No severe complications occurred.

Endobronchial Watanabe Spigots


  • If the use of EWS® alone does not improve the patient's condition, pleurodesis (for example using Steritalc®) or other therapy can follow after the collapsed lung has re-expanded and the loss of air is stopped.
  • The spigots can be removed after the patient’s condition has improved and the thoracic drain is removed.

Three Sizes available
S = Ø5mm
M = Ø6mm
L = Ø7mm

Last edited on Wednesday 9th of March, 2016 at 02:47pm