The invention relates to a medical instrument for withdrawal of tracheobronchial secretions or for introduction of curative agents, tubes, guiding elements, probes, endoscopes, catheters and the like into the respiratory tract of a patient....http://www.google.es/patents/US4454887?utm_source=gb-gplus-sharePatente US4454887 - Medical instruments for introduction into the respiratory tract of a patient
Medical instruments for introduction into the respiratory tract of a patient
