Endoscopic surgical blade and method of use thereof
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Publication Number
US-11376033-B2
Publication Date
2022-07-05
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
A low-profile endoscopic surgical blade and knife assembly is disclosed for treating trigger finger. The treatment is performed using an endoscope and a cannula having open proximal and distal ends and an open slot extending along the length of the cannula, so that a blade can move through the slot to engage and divide the A1 pulley.
The blade body has a cutting surface located at the distal end, with the cutting surface comprising a top end and a bottom end that is angled downward so that the top end of the cutting surface is forward of the bottom of the cutting surface. The blade body includes non-cutting radiused surfaces at the top end of the cutting surface as well as a trailing edge on the upper edge of the blade body.
The blade is sized to fit at a tip of the endoscope and is affixed to the tube by a mounting surface on the lower edge that aligns with and positions the blade on the tube. The assembly is configured to advance the endoscope such that the blade moves in contact with the A1 pulley through the slot and advance the blade through the cannula to divide the A1 pulley, with optional visualization after division.
Claims Coverage
The document includes one independent method claim. It describes a trigger finger treatment sequence based on proximal entry to the A1 pulley, insertion of a slotted cannula, and delivery of an endoscope-insertable low-profile blade that is angled downward and configured for engagement through the cannula slot, followed by advancing the blade to divide the A1 pulley.
Proximal entry portal near A1 pulley
Establishing an entry portal at a location proximal to A1 pulley.
Slotted cannula for blade passage
Inserting a cannula having open proximal and distal ends and an open slot extending along the length of the cannula.
Endoscope-insertable knife assembly with low-profile blade
Inserting an endoscope with an endoscopic knife assembly into the cannula, where the endoscopic knife assembly comprises a low-profile blade having a blade body with a cutting surface, and a tube through which the endoscope is insertable.
Downward angled radiused cutting surface sized for endoscope tip
Configuring the blade body such that the cutting surface at the distal end has a top end and bottom end and is angled downward so the top end is forward of the bottom, with non-cutting radiused surfaces at the top end of the cutting surface and a trailing edge on the upper edge; sizing the blade body to fit at a tip of the endoscope.
Mounting surface aligning and positioning the blade on the tube
Affixing the blade to the tube by a mounting surface on the lower edge that aligns with and positions the blade on the tube.
Advancing to engage A1 pulley through the cannula slot and dividing it
Advancing the endoscope so the blade moves in contact with the A1 pulley through the slot, operatively engaging the A1 pulley with the blade, and advancing the blade through the cannula to divide the A1 pulley.
Across the independent claim, the inventive concept centers on using a slotted cannula and an endoscope-delivered, low-profile blade whose downward angled, radiused cutting surface and endoscope-tip sizing allow controlled engagement of the A1 pulley through the cannula slot, followed by advancing the blade to divide the A1 pulley.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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