| 摘要 |
A flexible direct vision fiberoptical viewing or cable (80) is provided for placement within a urinary catheter ( IQ) with its tip located a a distal end of the catheter ( 10) such that the surfaces of the distal end of both the viewing cable (80) and the catheter (10) are aligned as to fit together to form a composite smoothly curved surface to facilitate negotiating obstructions The cable (80) is maintained in th position such that the catheter ( 10) with the surfaces that comprise the tip of the instrument are maintained in alignment The urethra can be viewed therethrough during all or part of the insertion procedure for observing and identifying obstructions that may be present and thereafter the cable (80) is withdrawn while allowing the catheter ( 10) to remain in place within the urethra The invention also includes a catheter ( 10) that serves as a working sheath and an obdurator (50) The invention facilitates endoscopic examination and can be used for performing surgical procedures through the sheath |
