Endoscopic surgical blade and method of use thereof
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Publication Number
US-10595891-B2
Publication Date
2020-03-24
Expiration Date
Abstract
An endoscopic surgical blade is disclosed. The blade is of a low-profile design, having a downward angled cutting surface that is radiused at its upper end. The blade is part of an endoscopic knife assembly which also contains a knife tube. The endoscopic knife assembly is for use in endoscopic surgery by insertion of the assembly through a slotted cannula. The knife tube is hollow and allows the insertion of an endoscope for viewing of the surgical procedure. A method for a performing an operative procedure on a target tissue in a subject using an endoscopic knife assembly having a low-profile, downward angled blade is also described.
Core Innovation
The invention discloses a low-profile endoscopic surgical blade for an endoscopic knife assembly. The blade includes a blade body with a cutting surface at a distal end, and the cutting surface is angled downward such that the top end of the cutting surface is forward of the bottom end.
The blade body includes a non-cutting surface that is a radiused surface at the top end of the cutting surface. A lower edge extends from a proximate end of the blade body and terminates at the bottom end of the cutting surface, and the blade is sized to fit at a tip of an endoscope.
The blade is sized and configured to be in contact with a surgical tube by a mounting surface on the lower edge, and the mounting surface aligns with and positions the blade with respect to the surgical tube. The disclosures also describe an endoscopic knife assembly and an instrument kit including a blade and a cannula guide having a longitudinal bore and a slot.
Claims Coverage
The independent claim defines the low-profile endoscopic blade geometry and its mounting and positioning relationship to a surgical tube, with the blade sized to fit at a tip of an endoscope. Dependent claims refine this concept by adding quantitative angle and size constraints and additional blade geometry features.
Downward-angled distal cutting surface
The cutting surface is at the distal end of the blade body and is angled downward so that the top end of the cutting surface is forward of the bottom end of the cutting surface.
Radiused non-cutting surface at the cutting surface top end
The non-cutting surface is a radiused surface at the top end of the cutting surface.
Mounting surface on lower edge aligns and positions blade with respect to surgical tube
The blade is in contact with a surgical tube by a mounting surface on the lower edge that aligns with and positions the blade with respect to the surgical tube.
Blade sized to fit at a tip of an endoscope
The blade is sized to fit at a tip of an endoscope.
Quantified downward angle range
The downward angle of a cutting surface on the low-profile blade is between about 20 degrees and about 40 degrees.
Specific downward angle value
The low-profile blade is defined to have a downward angle of about 30 degrees.
Double-beveled cutting surface
The cutting surface is a double-beveled cutting surface.
Tapered proximate end
The proximate portion of the blade body ends in a tapered end.
Total vertical height range
The low-profile blade has a total vertical height between about 1.8 mm and about 2.6 mm.
Across the dependent claim refinements, the coverage focuses on the downward-angled distal cutting geometry, radiused non-cutting surface, quantified angle and size constraints, and additional blade geometry such as a double-beveled cutting surface and a tapered proximate end, while maintaining the mounting and positioning relationship to a surgical tube and sizing for an endoscope tip.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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