The present invention relates to a sputum trap for an aspiration and respiratory support system which includes a manifold attachable to a specimen collection vial that is interposed between, and attached to, a suction control device and suction catheter device. The sputum trap allows for the collection...http://www.google.es/patents/US6325785?utm_source=gb-gplus-sharePatente US6325785 - Sputum trap manifold with nested caps
