Pneumatic surgical instrument and corresponding methods for penetrating, resecting and microfracturing bone

摘要

Various embodiments of components, devices, systems and methods are provided for a pneumatic surgical instrument having a distal end of a probe configured to penetrate bone, resect or microfracture bone. The injury caused to the bone by the penetration, resection or microfracturing of same causes blood to flow to the injury site and promote the growth of new bone at the site. Holes or recesses in the bone may also be employed to treat arthritis in patient, to form holes or recesses in which one or more orthopedic implants are attached or anchored to same, form microfractures in bone, resect bone, perform osteotomies, or to carry out yet other surgical procedures in bone.

主权项

1. A self-contained pneumatic surgical instrument configured to penetrate, resect or microfracture bone, comprising:
a striker; a removable probe mountable on a distal end of the instrument; at least one removable probe cap configured to receive a proximal end of the removable probe therein or therethrough, the probe cap being mountable on the distal end of the surgical instrument; at least one removable O-ring disposed between an inner surface of the probe cap and a distal terminus of the removable probe; a pressure regulator; a gas cartridge operably connected to the pressure regulator, the gas cartridge and pressure regulator forming portions of the self-contained pneumatic surgical instrument; a trigger mechanism comprising a trigger, the trigger mechanism being operably connected to the pressure regulator and to the striker; wherein the probe has a distal end configured and shaped to penetrate, resect or microfracture bone, the instrument is configured to deliver at least one shock wave to the probe when the trigger is actuated by a user and a predetermined volume of gas stored at a predetermined range of pressures in the instrument is released thereby to cause the striker to move towards a distal end of the instrument and deliver the shock wave to the proximal end of the probe, the shockwave delivered by the probe to the bone having a rise time ranging between about 2 microseconds and about 20 microseconds, the shockwave being substantially repeatable by the instrument when the trigger is actuated again by the user; wherein the at least one O-ring is selectable according to a thickness, mechanical properties, materials, or stiffness of the O-ring, and the at least one probe cap is selectable such that internal dimensions of the at least one probe cap are configured, thereby to provide a given amount of relative displacement between the probe and the instrument when the instrument is triggered or actuated; and wherein selection of a different one of the at least one O-ring and/or at least one cap provides the probe with a different relative displacement between the probe and the instrument as compared with a selection of another of the at least one cap and/or at least one O-ring.