Expandable cannulas

Details Expandable cannulas Expandable cannulas

1995-04-04

1997-02-11

Thaler, Michael H.

Surgery

Instruments

Internal pressure applicator

600207, A61M 2902

Patent

active

056015909

ABSTRACT:
Cannulas for surgical and medical use expand along their entire lengths. The cannulas are inserted through tissue when in an unexpanded condition and with a small diameter. The cannulas are then expanded radially outwardly to give a full-size instrument passage. Expansion of the cannulas occurs against the viscoelastic resistance of the surrounding tissue. The expandable cannulas do not require a full depth incision, or at most require only a needle-size entrance opening.

REFERENCES:
patent: 577775 (1897-02-01), Mussey
patent: 1735519 (1929-11-01), Vance
patent: 2281600 (1942-05-01), Ross
patent: 4299227 (1981-11-01), Lincoff
patent: 4312353 (1982-01-01), Shahbabian
patent: 4465072 (1984-08-01), Taheri
patent: 5331975 (1994-07-01), Bonutti
patent: 5353785 (1994-10-01), Wilk
patent: 5401241 (1995-03-01), Delany

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