Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-06-06
1996-11-12
Thaler, Michael H.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604164, 606198, A61B 1702
Patent
active
055735177
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.
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Bonutti Peter M.
Hawkins James S.
Bonutti Peter M.
Thaler Michael H.
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