Surgery – Instruments – Internal pressure applicator
Patent
1995-06-06
1997-10-07
Dawson, Glenn
Surgery
Instruments
Internal pressure applicator
604264, 604282, 606191, A61M 2900
Patent
active
056742401
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. In one embodiment of the invention, the cannula has a pointed end portion. In this embodiment of the invention, the cannula includes wires having cores which are enclosed by jackets. The jackets are integrally formed as one piece with a sheath of the cannula. The cannula may be expanded by inserting members or by fluid pressure. The cannula is advantageously utilized to expand a vessel, such as a blood vessel. An expandable chamber may be provided at the distal end of the cannula.
REFERENCES:
patent: 219296 (1885-06-01), Molesworth
patent: 668879 (1901-02-01), Miller
patent: 702789 (1902-06-01), Gibson
patent: 2566499 (1951-09-01), Richter
patent: 3788318 (1974-01-01), Kim et al.
patent: 3789852 (1974-02-01), Kim et al.
patent: 3811449 (1974-05-01), Gravlee et al.
patent: 3968800 (1976-07-01), Vilasi
patent: 4183102 (1980-01-01), Guiset
patent: 4320762 (1982-03-01), Bentov
patent: 4461281 (1984-07-01), Carson
patent: 4504268 (1985-03-01), Herlitze
patent: 4589868 (1986-05-01), Dretler
patent: 4630609 (1986-12-01), Chin
patent: 4685458 (1987-08-01), Leckrone
patent: 4706670 (1987-11-01), Andersen et al.
patent: 4716901 (1988-01-01), Jackson et al.
patent: 4846812 (1989-07-01), Walker et al.
patent: 4899729 (1990-02-01), Gill et al.
patent: 4954126 (1990-09-01), Wallsten
patent: 4966583 (1990-10-01), Debbas
patent: 4998539 (1991-03-01), Delsanti
patent: 5037404 (1991-08-01), Gold et al.
patent: 5041093 (1991-08-01), Chu
patent: 5069674 (1991-12-01), Fearnot et al.
patent: 5183464 (1993-02-01), Dubrul et al.
patent: 5197971 (1993-03-01), Bonutti
patent: 5226899 (1993-07-01), Lee et al.
patent: 5234425 (1993-08-01), Fogarty et al.
patent: 5318588 (1994-06-01), Horzewski et al.
patent: 5328480 (1994-07-01), Melker et al.
patent: 5496292 (1996-03-01), Burnham
Bonutti Peter M.
Hawkins James S.
Bonutti Peter M.
Dawson Glenn
LandOfFree
Expandable cannula does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Expandable cannula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expandable cannula will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2353251