Minimally invasive surgical acess device
AssigneeThompson MIS
InventorsMick J. Perez-Cruet, John R. Pepper
Life of this patent
Estimating the term…
Abstract
A minimally invasive surgical access device that allows access to a pathology being treated while significantly reducing the risk of damaging anatomical structures proximate the pathology. The access device includes a base portion having a central bore extending therethrough, and retractor blades pivotably mounted to the base portion. An insertion handle is coupled to the base portion to thread the retractor blades into the patient. The insertion handle is removed from the base portion, and a core hollow screw is threaded into the base portion to separate the retractor blades to gain access to the pathology through the hollow screw.
Claims20
A surgical access device assembly comprising:
- a base portion including a central bore;
- a plurality of retractor blades pivotably mounted to the base portion and including an internal threaded portion, said plurality of retractor blades combining to form a predetermined internal shape in a closed position having a pointed end opposite to the base portion;
- and
- a first handle having an elongated body and an end portion that conforms to the internal shape of the plurality of retractor blades when the retractor blades are in the closed position, said retractor blades including a locking structure for securing the retractor blades in the closed position, said handle being rotatable so that the retractor blades are rotatable.
A surgical access device assembly comprising:
- a base portion including a central bore;
- a plurality of retractor blades pivotably mounted to the base portion and including an internal threaded portion, said plurality of retractor blades combining to form a predetermined internal shape in a closed position having a pointed end opposite to the base portion;
- and
- a core hollow screw having an internal bore and an external threaded portion, said core hollow screw being operable to be threaded into the predetermined shape formed by the plurality of retractor blades to cause the plurality of retractor blades to separate.
A surgical access device assembly comprising:
- a circular base portion including a circular central bore, said base portion further including a plurality of symmetrically disposed holes around the central bore;
- a plurality of retractor blades pivotably mounted to the base portion and including an internal threaded portion and an external threaded portion, each of the plurality of retractor blades including an upper tab pivotably mounted on a rod mounted in an opening of the base portion, said plurality of retractor blades combining to form a conical shape in a closed position having a pointed end opposite to the base portion;
- a first handle including an elongated body and a conical end portion that conforms to the internal shape of the plurality of retractor blades when the retractor blades are in the closed position, said first handle further including a plurality of symmetrically disposed pins mounted to a central support portion of the first handle that align with the symmetrically disposed holes in the base portion so as to allow the base portion to be rotated by the first handle when the first handle is attached to the base portion, said conical end portion of the first handle including a plurality of tab portions that interlock within openings between the plurality of retractor blades for securing the retractor blades in the closed position;
- a core hollow screw having an internal bore and an external threaded portion;
- and
- a second handle having an elongated body and being attachable and detachable to and from the core hollow screw, said second handle being operable to thread the core hollow screw into the plurality of retractor blades when the first handle is removed from the base portion to cause the plurality of retractor blades to separate.
Dependencies are inferred from the claim text.