Compact endoscopic surgical blade assembly and method of use thereof

Inventors

Mirza, Romi • Mirza, Ather

Assignees

A M Surgical Inc

Abstract

An endoscopic surgical device comprising a slotted clear cannula, a blade and a case, wherein the cannula is attached to the case, and wherein the blade is enclosed in the case and is slidable into the cannula is disclosed. The blade is enclosed within the case and cannula, and has a horizontally-oriented pushing component and a vertically-oriented cutting component that protrudes through the slot of the cannula. A method for a performing an operative procedure on a target tissue in a subject using the endoscopic surgical device is also described.

Core Innovation

The invention relates to an endoscopic surgical device that includes a slotted clear cannula with a longitudinal slot along its top. A blade is provided with a vertically-oriented cutting surface such that the longitudinal slot of the cannula and the vertically-oriented cutting surface of the blade together define a vertical plane, and the blade is deployed in a vertical direction substantially aligned with the vertical plane through the cannula slot. The device further includes a horizontally-oriented pusher component attached to and extending proximally from the blade.

A case is arranged proximal to the cannula and has a proximal case end and a distal case end, with the case internally comprising sloping, horizontally opposed guidance slots. Tabs at a proximal end of the pusher component are slidably associated with the sloping, horizontally oriented guidance slots. The proximal cannula end is attached to the distal case end, and the pusher component is enclosed by the case, including enclosure of the proximal end of the pusher component. The proximal case end acts as a stop to prevent the proximal end of the pusher component from extending outwardly from the proximal case end.

The disclosed configuration supports uniportal endoscopic surgical procedures in which an endoscope may be inserted through an opening in the case and into a channel of the cannula. In the disclosed procedures, target tissue can be released by deploying a scraper and deploying the blade, while maintaining visualization. The document enumerates specific uniportal endoscopic surgical procedure selections including trigger finger release, carpal tunnel release, cubital tunnel release, plantar fascia release, lateral release for patella realignment, release of the extensor tendons, release of the posterior or other compartments of the leg, and forearm fascial release. The document also identifies target tissue selections including an A1 pulley, carpal tunnel, cubital tunnel, and Guyon’s tunnel.

Claims Coverage

The partial content includes one independent claim, with dependent claims refining the cannula distal-end configuration and further narrowing particular method interfaces and selected uniportal procedures/target tissues. The independent claim contains the core device architecture: a slotted clear cannula defining a vertical plane with a vertically-oriented blade cutting surface, together with a horizontally-oriented pusher guided by sloping, horizontally opposed guidance slots inside a case.

Across the dependent claims in the provided list, coverage is narrowed by specifying a closed or tapered closed distal cannula end, and by further defining method interfaces (inserting an endoscope through an opening in the case and into a channel of the cannula) and by enumerating specific uniportal endoscopic surgical procedures and target tissue selections.

Stated Advantages

Documented Applications