A catheter for collecting fluid such as blood from a vessel such as a coronary sinus of a patient has an elongated, flexible tubular portion and an annular sealing member spaced from a distal end of the tubular member. A proximal end of the tubular member is adapted to be connected to a source of suction...http://www.google.es/patents/US8152786?utm_source=gb-gplus-sharePatente US8152786 - Collection catheter and kit
