Surgical file instrument

Abstract

A reciprocating surgical file system for precisely removing bone and / or other tissue is described. The system allows a user to maneuver the system and navigate into hard-to-access sites under a direct vision mechanism. A transmission mechanism converts rotary motion from a motor into reciprocating motion and provides it to the surgical file for precision removal of bone or other tissue. A pulsatile pump mechanism is operatively coupled with the transmission mechanism and provides irrigating fluid to the surgical site.

Description

RELATED APPLICATIONS [0001] This application is a continuation-in-part of U.S. application Ser. No. 10 / 675,068, entitled SHIELDED RECIPROCATING SURGICAL FILE, filed Sep. 29, 2003, which claims the benefit of U.S. Provisional Application No. 60 / 414,690, filed Sep. 27, 2002, and this application also claims the priority benefit under 35 U.S.C. §119(e) of U.S. Provisional Application No. 60 / 621,843, filed Oct. 25, 2004, U.S. Provisional Application No. 60 / 621,853, filed Oct. 25, 2004, and U.S. Provisional Application No. 60 / 701,727, filed Jul. 22, 2005, all of which are hereby incorporated by reference in their entireties.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention relates generally to systems and methods for tissue cutting and removal. More particularly, the invention relates to a reciprocating surgical file system for cutting, removing, grinding, shaping and sculpturing bone and / or tissue material under direct vision. [0004] 2. Description of the...

AI Technical Summary

Benefits of technology

"The invention provides a surgical instrument for tissue cutting and removal that includes a reciprocating surgical file and a direct vision apparatus. This allows surgeons to navigate into small neuroforamina-next to delicate nerves under direct visual guidance. The instrument has a blade with a cutting surface that can perform grinding, filing, and cutting of tissue. The blade is movable and slidably coupled with a lower blade structure that has an upper face. The lower blade structure has a shield surface that forms a tip that can be curved towards the blade. The instrument also has a distal assembly with a blade and lower blade structure that can fit into a neuroforamen without trauma to the nerve. The invention provides a minimally traumatic option for surgery that can result in shorter hospital stays and lower costs."

Problems solved by technology

Many million suffer from truly problematic back pain that either keeps them out of work or debilitates them in some way.

Many vertebral and disc injuries result in pain from nerve irritation and compression.

When an intervertebral disc is damaged, often it is because of a physical overrotation between two vertebrae and normal wear and tear.

When a vertebra is overrotated, small facet joints called the zygopophyseal capsules that are located to the left and right sides of the disc are damaged.

When the body incurs damage to these small joints, unwanted osteophytes and bony overgrowths frequently occur at the edges of these tiny joints.

The unwanted bony overgrowth restricts the neuroforamen and pinches the delicate and sensitive nerve roots.

Pinched nerves that are constrained in between vertebras can cause neck and back pain.

The bony overgrowth and a reduction in the space between vertebras pinch the nerves causing irritation, pain and numbness.

The pinching can potentially result in a loss of use of the limbs controlled by the affected nerve.

Thus, when intervertebral discs are damaged from accident, age and / or general wear and tear the intervertebral nerve roots in the neuroforamen are irritated and pinched and can cause unwanted involuntary muscular contractions.

This becomes a severely painful, self-destructive and self-feeding problem.

This causes added strain on the disc above and below the now rigid bone fusion.

Sometimes the attempted fusion of one vertebra onto another vertebra is unsuccessful and does not provide the intended fusion.

Disadvantageously, the intervertebral fusion is an invasive and relatively complicated procedure.

In addition, and undesirably, the fusion process can result in a long hospital stay for the patient, a long recuperation and rehabilitation period and high costs for both the patient and care providers.

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