Bi-axial cutter apparatus for catheter
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United States of America Patent
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-
Aug 15, 1995
Issued Date -
N/A
app pub date -
May 27, 1994
filing date -
Sep 1, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An cutter apparatus for removing obstructive tissue has a distal housing having a window for invaginating tissue. An axially reciprocating and rotating cutting blade makes successive longitudinal cuts while slowly rotating across the open window. An axial guide assembly holds the cutting edge of the blade in a cutting path immediately adjacent to the inner surface of the housing. The shape and motion of the cutting blade pares off a generally uniformly thick slice of tissue from the stenosis and directs it toward the interior of the housing. A spiral parting edge opposed to the rotating cutting edge provides clean separation of the tissue slice from the stenosis. The tissue slice is received in a chamber internal to the housing and is retained by the blade and guide assembly for later removal from the patient.
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