Laparoscopic tissue cutting device
Inventors
Pilletere, Roy J. • Baril, Jacob C. • Dinino, Matthew A. • THOMAS, JUSTIN J. • Ebersole, Garrett P. • Banerjee, Saumya • Roy, Nicolette L.
Assignees
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Publication Number
US-12471943-B2
Publication Date
2025-11-18
Expiration Date
Abstract
A tissue cutting device has a blade that pivots to pierce through tissue and translates to cut tissue, thereby providing a clean and smooth cut through tissue. The blade is coupled to an axial rod. Axial displacement of the axial rod pivots the blade and imparts axial displacement to the blade.
Core Innovation
The invention relates to a laparoscopic tissue cutting device having an elongate shaft assembly and a blade assembly supported at a distal portion. The elongate shaft defines a first lumen and a second lumen, and an actuation assembly includes a pivoting rod slidably extending through the first lumen and an axial rod slidably extending through the second lumen. The blade assembly includes a body supporting a blade to cut tissue and a camming portion that slidably engages the support of the elongate shaft assembly.
A first axial displacement of the axial rod pivots the blade between a closed configuration, where a distal portion of the blade engages the support, and an open configuration, where the blade is pivoted to receive tissue between the blade and the support. A second axial displacement of the axial rod imparts concomitant axial displacement to the blade assembly to cut tissue, including piercing through tissue as described in the claims. The body is operatively coupled to the pivoting rod and the axial rod so that axial displacement pivots the blade and drives axial movement of the blade assembly for cutting.
The disclosed mechanical structure includes a support on the elongate shaft assembly with a planar portion and an arcuate portion, and the support may have a substantially semicylindrical shape. A groove on the planar portion can include superposed groove portions, including a first groove portion and a second groove portion, and the second lumen can be axially aligned with the groove or communicated with the groove. A blade body can define a bore for receiving a support pin and can include a pivot pin configured to engage bores of the pivoting rod, thereby operatively coupling the body of the blade to the pivoting rod and coupling the body to the axial rod.
Claims Coverage
The document includes three independent claims, each directed to a tissue cutting device in which axial displacement of an axial rod pivots a blade and also provides axial displacement to cut tissue. Across the independent claims, the main inventive features are the structural coupling among the pivoting rod, axial rod, and blade body, the defined closed/open configurations, and specific mechanical relationships such as groove/lumen alignment and pin/bore coupling.
Pivoted blade driven by first and second axial displacement of axial rod
The axial rod has a first axial displacement that pivots the blade between a closed configuration, in which a distal portion of the blade engages the support, and an open configuration, in which the blade is pivoted to receive tissue between the blade and the support, and a second axial displacement that imparts concomitant axial displacement to the blade assembly to cut tissue.
Camming portion slidably engaging shaft support
The blade assembly body includes a camming portion slidably engaging the support of the elongate shaft assembly, and the body is operatively coupled to the pivoting rod and the axial rod so that axial displacement pivots the blade and drives axial displacement for cutting.
Actuation with pivoting rod through first lumen and axial rod through second lumen
An actuation assembly includes a pivoting rod slidably extending through the first lumen and an axial rod slidably extending through the second lumen of the elongate shaft, with axial displacement controlling blade pivoting and cutting.
Axial displacement pivots pointed-tip blade to pierce and cut tissue
A blade assembly includes a blade having a pointed tip, and the body supporting the blade slidably engages the support such that axial displacement of the axial rod pivots the blade to pierce through tissue and imparts axial displacement to the blade to cut tissue.
Pivot pin and support pin bore coupling between blade body, pivoting rod, and axial rod
The blade body defines a bore and includes a pivot pin extending outwards configured to engage at least one bore of the pivoting rod to operatively couple the body of the blade to the pivoting rod, and the axial rod includes a support pin configured to engage the bore of the body to operatively couple the body of the blade to the axial rod such that axial displacement pivots the blade to pierce through tissue and imparts axial displacement to cut tissue.
Across the independent claims, the claim coverage centers on an elongate shaft with first and second lumens and an actuation assembly where axial rod displacement pivots a blade into closed and open configurations and also provides concomitant axial displacement of the blade assembly to cut tissue, including piercing in the pointed-tip configuration. The disclosed coupling mechanics include camming portion engagement and, in specific embodiments, pin/bore relationships that operatively couple the blade body to both the pivoting rod and axial rod.
Stated Advantages
Documented Applications
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