Endoscopic surgical blade and method of use thereof
Inventors
Assignees
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Publication Number
US-10314606-B2
Publication Date
2019-06-11
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 relates to an endoscopic surgical procedure implemented with an endoscopic surgical assembly that includes a low-profile blade having a proximal section and a distal section with a downward angled cutting surface. The cutting surface is radiused at its upper end at the distal end of the blade, and the blade includes a trailing edge that is radiused at its upper end at the proximal end of the blade.
The low-profile blade is associated with a surgical tube having a proximal end and a distal end. The proximal section of the low-profile blade is in contact with the distal end of the surgical tube along an interface extending parallel with a longitudinal centerline of the tube, and the trailing edge of the low-profile blade and the interface extending parallel with the longitudinal centerline of the tube are angled with respect to each other.
The invention also provides an instrument kit architecture that can include a clear cannula, a hollow knife tube having an open slot extending along its length, and optional components such as an obturator, an elevator and/or an endoscope. Additional described refinements include an alignment ring attached near the proximal end and one or more slots for attachment of a locking assembly, and a blade total vertical height in the range of about 1.8 mm to about 2.6 mm.
Claims Coverage
The provided independent claims cover instrument kits for implementing an endoscopic surgical procedure with an endoscopic surgical assembly centered on a specific low-profile blade geometry and its mechanical relationship to a surgical tube or knife tube, and they further cover optional kit components including cannula and visualization or adjunct instruments. The inventive features repeatedly define the downward angled radiused cutting surface and radiused trailing edge, the blade-to-tube interface relationship and angled relationship, and optional inclusion of a clear cannula, open-slot configurations, and tools such as obturator, elevator, and endoscope.
Radiused downward angled cutting surface geometry for a low-profile blade
A low-profile blade having a proximal section and a distal section with a downward angled cutting surface that is radiused at its upper end at the distal end of the blade and a trailing edge that is radiused at its upper end at the proximal end of the blade.
Blade-to-tube interface extending parallel with longitudinal centerline and angled relationship
The proximal section of the low-profile blade is in contact with the distal end of the surgical tube along an interface extending parallel with a longitudinal centerline of the tube, wherein the trailing edge of the low-profile blade and the interface extending parallel with the longitudinal centerline of the tube are angled with respect to each other.
Clear cannula inclusion for the instrument kit
The kit further comprises a clear cannula.
Hollow knife tube with open slot extending along its length
The knife tube is hollow and comprises an open slot extending along its length.
Alignment ring and proximal slots for locking assembly attachment
The knife tube comprises an alignment ring attached near the proximal end and one or more slots at the proximal end for the attachment of a locking assembly to the knife tube and alignment ring.
Total vertical height range of about 1.8 mm to about 2.6 mm
The blade has a total vertical height in the range of about 1.8 mm to about 2.6 mm.
Kit includes an obturator, an elevator and/or an endoscope
The kit further comprising an obturator, an elevator and/or an endoscope.
Kit further comprises an elevator or a curved dissector
The kit further comprising an elevator or a curved dissector.
Across the independent claims, the inventive coverage is centered on a low-profile blade with a radiused downward angled cutting surface and a radiused trailing edge, with the proximal blade section arranged relative to a tube via an interface parallel to a tube longitudinal centerline and with an angled trailing edge or interface relationship. The claims further allocate additional mechanical and structural constraints and specify optional kit elements such as clear cannula, obturator, elevator or curved dissector, and endoscope.
Stated Advantages
Benefits over conventional multi-incision approaches.
Documented Applications
Uniportal endoscopic trigger finger release surgery described using a slotted cannula and an inserted endoscope for direct visualization of the procedure, including engaging and dividing the A1 pulley.
Direct visualization of the procedure enabled by endoscope or arthroscope insertion through the hollow knife tube.
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