Surgical drill with curved burr attachment and method
AssigneeDePuy Synthes Products, Inc.
InventorsEddy H. del Rio, Douglas A. Perry
Life of this patent
Estimating the term…
Abstract
A surgical drilling instrument with a Curved Burr Attachment having an adapter removably coupled to a drill motor and a burr attachment coupled to said adapter. The burr attachment includes a tube with a wire shaft supported therein and a coil wire surrounding said wire shaft and having each of the coils touch the outer periphery surface of the wire shaft and the inner peripheral surface of said tube to enhance cooling of said outer periphery of said tube from the heat generated by said wire shaft and attenuate vibrations while allowing said burr attachment to be bent without kinking.
Claims19
A medical instrument for burring into small bones in a human patient comprising:
- a reusable adapter configured to be coupled to a motor for effectuating rotation;
- and
- a burr attachment removably attachable to said adapter, said burr attachment comprising,
- an elongated tube;
- a wire shaft supported in said tube and coupled to said adapter for rotation thereof;
- a cutter attached to said wire shaft and extending a precise distance from an end of said elongated tube;
- a coil wire mounted between an inner surface of said elongated tube and said wire shaft, such that the coil surrounds said wire shaft;
- a proximal end support attached to said wire shaft and configured to be coupled to said adapter and affixed thereto so as to rotate therewith;
- and
- a distal end support attached to said proximal end support such that the proximal end support is rotatable with respect to the distal end support, said distal end support including a detent and a complementary ball on said adaptor that limits the position of said burr attachment so that the position of the cutter is always in a precise position,
- wherein said burr attachment is disposable and bendable without forming kinks therein.
A combination comprising:
- an adapter and a disposable and bendable burr attachment removably coupled to said adapter, wherein the bendable burr attachment includes:
- a tube;
- a wire shaft disposed in said tube and extending beyond a distal end of said tube;
- a cutter mounted on a distal end of said wire shaft and extending beyond said tube;
- and
- a coil wire surrounding said wire shaft and fitted between said wire shaft and said tube assuring that the burr attachment does not kink when bent, and
- wherein said adapter includes:
- a main housing having a central axis and defining a cavity for receiving a proximal end of said burr attachment and operatively connected to said wire shaft for rotating said cutter,
- a sleeve mounted over said main housing defining a grip adapted to be held by a surgeon for use in a medical procedure;
- a spindle mounted in said cavity being in coincidence with said central axis of said housing and being adapted to be coupled to a motor to impart rotary motion thereto;
- and
- wherein at least one ball of said adapter and a detent of said burr attachment are configured to engage each other to couple said burr attachment and said spindle for powering said cutter,
- wherein the burr attachment includes 1) a proximal end support configured to receive a proximal end of said wire shaft and being affixed thereto so as to rotate therewith, and 2) a cam having a tapered surface that is configured to drive said ball radially inward into an annular groove of the proximal end support when said burr attachment is inserted into said cavity to couple said spindle to said proximal end support, such that said ball is captured between the tapered surface and the proximal end support when the ball is disposed in the annular groove, and
- wherein said burr attachment has a dimensional profile on a proximal end of the burr attachment that matches a complementary dimensional profile on an inlet to said cavity so as to receive said burr attachment in only a predetermined orientation.
Dependencies are inferred from the claim text.