초록 ▼

An improved lipectomy device, or cannula, is disclosed having inner and outer tubes. The outer tube has an elongated aspiration aperture, and the inner tube has a spiral slot. A mechanism inside the handle of the device causes the inner tube to rotate, creating a traveling hole effect along the aspi

An improved lipectomy device, or cannula, is disclosed having inner and outer tubes. The outer tube has an elongated aspiration aperture, and the inner tube has a spiral slot. A mechanism inside the handle of the device causes the inner tube to rotate, creating a traveling hole effect along the aspiration aperture. This obviates the necessity of the surgeon repeatedly pushing the cannula in and out. A valve system is also disclosed which allows the surgeon to maintain negative pressure in the vacuum line leading to the cannula while still allowing the cannula itself to be vented to ambient pressures.

대표청구항 ▼

An improved lipectomy cannula, comprising: handle means; an outer tube having distal and proximate ends, and having a first longitudinal slot, said outer tube being open at said proximate end, and said proximate end of said outer tube attached to said handle means; an inner tube having distal and pr

An improved lipectomy cannula, comprising: handle means; an outer tube having distal and proximate ends, and having a first longitudinal slot, said outer tube being open at said proximate end, and said proximate end of said outer tube attached to said handle means; an inner tube having distal and proximate ends, and having a second spiral slot, said inner tube located within said outer tube, said inner tube being open at said proximate end, and said proximate end of said inner tube attached to said handle means; vacuum means coupled to said inner tube for creating suction within said inner tube; said spiral and longitudinal slots each having rounded cutting edges along their length to remove fat lobules by tearing in conjunction with said vacuum means; motor means coupled to said inner tube for rotating said inner tube; and valve means having first and second positions whereby, when said valve means is in said first position, negative pressure is maintained within said vacuum means, and said inner tube is vented to surrounding atmosphere and, when said valve means is in said second position, said vacuum means is in fluid communication with said inner tube, said valve means being interposed between said inner tube and said vacuum means.