Catheter guide formed notably from a multistrand spring sheath
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United States of America Patent
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-
Dec 20, 1994
Grant Date -
N/A
app pub date -
Sep 14, 1993
filing date -
Sep 29, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns a catheter guide (1) comprising a wire (2) having a proximal part (6) of approximately constant cross section and a tapered distal part (8) and a supple protective sheath (4) formed by a helicoidal spring extended at least around the length of the tapered distal part (8) the wire (2) being fixed to the sheath (4) by at least the free end of its proximal part by means of a first solder joint (10) at a proximal part (12) of the sheath, the free end (14) of the distal part of the sheath (4) being provided with a second solder joint (16) forming a rounded end, wherein the spring forming the sheath comprises, along its entire length, a first strand (18) wound with a first pitch for forming a series of first windings S18 and at least a second strand (20,22,24) wound with a second pitch of a value slightly greater than that of the first pitch for forming a series of second windings (S20,S22,S24) such that the first windings (S18) exert a compressive force on the second windings (S20, S22, S24).
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Cited Art Landscape
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