Endoscope with tapered shaft

Details Endoscope with tapered shaft Endoscope with tapered shaft

1990-07-25

1992-01-28

Grieb, William H.

Surgery

Truss

Perineal

128 4, 604 21, 604 22, 604 28, A61B 106

Patent

active

050835491

ABSTRACT:
A fiber optic endoscope has a shaft with a varying outer diameter. The distal end of the shaft is sufficiently small in outside diameter for maneuvering it through various body canals, and is useful in dilating body orifices to allow more proximal, longer-diameter portions of the shaft to penetrate. The endoscope shaft changes in thickness and is preferably in stages of different constant outside diameter. A flexible tip portion at the distal end of the shaft which is controllable from the endoscope handle may be included. Transitions between adjacent stages are smooth to provide a gradual transition between stages. The endoscope outer shaft is preferably made from a one-piece structure, portions of which are reduced in outside diamter to provide the different stages of the endoscope shaft.

REFERENCES:
patent: 1995196 (1935-03-01), Wolf
patent: 3788304 (1974-01-01), Takahashi
patent: 4146019 (1979-03-01), Bass et al.
patent: 4483326 (1984-11-01), Yamaka et al.
patent: 4589404 (1986-05-01), Barath et al.
patent: 4685449 (1987-08-01), Bonnet
patent: 4690175 (1987-09-01), Ouchi et al.
patent: 4802461 (1989-02-01), Cho
patent: 5031603 (1991-07-01), Gautier et al.
Richard Wolf Medical Instruments Catalog, III 87, 1987, pp. D1-D43, D58-D60; FOL-5.
W. B. Allan, "Fiber Optics Theory and Practice," Optical Physic and Engineering, Series Editor William L. Wolfe, Plenus Press, 1973, pp. 148-176.
Denise Grady, "The Artery Zapper," Discover, Dec. 1982, pp. 36-40.
Yoshikatsu Tanahashi, M. D., "Transurethral Disintegration of Urinary Calculi by the Use of Laser Beam", Urology, vol. 10, pp. 30-33, 1981.

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