An permanent indwelling catheter is provided with a selectively inflatable exterior balloon valve to to seal one or more orifices defined in the catheter wall or tip. The longitudinal lumen may either comprise a single central axial lumen or a plurality of subdivided lumens within the catheter...http://www.google.es/patents/US5792118?utm_source=gb-gplus-sharePatente US5792118 - Permanent catheter with an exterior balloon valve and method of using the same
Permanent catheter with an exterior balloon valve and method of using the ...
