Endoscopic Vessel Dissector With Side Entry
AssigneesOlympus Medical Systems Corp., Terumo Cardiovascular Systems Corporation
InventorsRandal J. Kadykowski, Hideyuki Kasahara, Takahiro Kogasaka
Life of this patent
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Abstract
A blunt dissector for endoscopic vein harvesting has a generally-cylindrical sheath for retaining an elongated endoscope. The sheath is elongated between a distal end and a proximal end. A transparent tip is disposed at the distal end of the sheath. A handle is disposed at the proximal end of the sheath. The sheath includes a selectably closable longitudinal slot having an opened configuration such that the endoscope can be inserted radially into the sheath. The longitudinal slot has a closed configuration that retains the endoscope within the sheath and presents a substantially it) smooth outer surface for use during dissection.
Claims18
A blunt dissector for endoscopic vein harvesting adapted to receive an endoscope having a head portion mounted at a proximal end of a rod portion, the dissector comprising:
- a hollow handle having a recess for receiving the head portion;
- a first sheath member fixed with respect to the handle and having a longitudinal niche extending around a longitudinal centerline from the handle toward a distal end of the first sheath member, wherein the longitudinal niche has an angular opening sufficient to accept radial insertion of the rod portion of the endoscope onto the centerline, wherein the radial insertion is substantially perpendicular to the longitudinal centerline;
- a dissector tip mounted at the distal end of the first sheath member;
- and
- a second sheath member movably mounted with respect to the first sheath member for enclosing the longitudinal niche after radial insertion of the rod portion into the niche for performing a dissection, and for reopening the longitudinal niche after performing the dissection to radially remove the rod portion from the first sheath member.
A blunt dissector for endoscopic vein harvesting adapted to receive an endoscope having a head portion mounted at a proximal end of a rod portion, the dissector comprising:
- a hollow handle having a recess for receiving the head portion;
- a first sheath member fixed with respect to the handle and having a longitudinal niche extending around a longitudinal centerline from the handle toward a distal end of the first sheath member, wherein the longitudinal niche has an angular opening sufficient to accept radial insertion of the rod portion of the endoscope onto the centerline, wherein the radial insertion is substantially perpendicular to the longitudinal centerline;
- a dissector tip mounted at the distal end of the first sheath member;
- a second sheath member movably mounted with respect to the first sheath member for enclosing the longitudinal niche after radial insertion of the rod portion into the niche for performing a dissection, and for reopening the longitudinal niche after performing the dissection to radially remove the rod portion from the first sheath member;
- and
- a resilient annular seal abutting at least one of the dissector tip or the second sheath member and having an inner opening aligned with the centerline, wherein the inner opening is adapted to receive a distal end of the rod portion of the endoscope, whereby a cavity within the dissector tip containing the distal end of the rod portion during dissection is sealed against intrusion of fluids.
Dependencies are inferred from the claim text.