Intramedullary bone cutting saw
First Claim
Patent Images
1. A saw for cutting a bone having an intramedullary canal comprising:
- a tube having a longitudinal axis and a side wall with a slot therethrough, the tube positionable within the intramedullary canal of the bone;
a cutting blade movable transversely of the longitudinal axis of the tube and through the slot between a rest location within the tube and a working location outside the tube and within the bone;
an actuating mechanism coupled to the cutting blade for moving the cutting blade through the slot, alternately between the rest location and the working location; and
a motor coupled to the cutting blade to operate the cutting blade about the longitudinal axis of the tube to cut the bone when the cutting blade is in the working location.
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Accused Products
Abstract
A powered bone cutting saw is used from within the intramedullary canal of a bone. A cutting blade is inserted through a bored intramedullary canal to a predetermined cutting depth. A motor is coupled to the cutting blade to rotate the cutting blade. The blade is extended to a cutting position and operated by a surgeon to cut the bone radially from the inside outwardly, transversely, to the intramedullary canal. Gearing selectable by the surgeon permits the blade to oscillate. The motor can also be coupled to a reamer tip for boring the intramedullary canal. The apparatus, including the reamer tip, can be cannulated to accept a guide wire.
1750 Citations
67 Claims
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1. A saw for cutting a bone having an intramedullary canal comprising:
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a tube having a longitudinal axis and a side wall with a slot therethrough, the tube positionable within the intramedullary canal of the bone; a cutting blade movable transversely of the longitudinal axis of the tube and through the slot between a rest location within the tube and a working location outside the tube and within the bone; an actuating mechanism coupled to the cutting blade for moving the cutting blade through the slot, alternately between the rest location and the working location; and a motor coupled to the cutting blade to operate the cutting blade about the longitudinal axis of the tube to cut the bone when the cutting blade is in the working location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 63)
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12. An intramedullary saw for cutting a bone having an intramedullary canal comprising:
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an elongate tubular member disposable longitudinally within the intramedullary canal, the tubular member having a longitudinal axis and a side wall with a slot therethrough; a cutting blade responsive to the tubular member and extendable transversely of the longitudinal axis of the tubular member and through the slot between a rest position within the tubular member and a working position outside the tubular member; an elongate actuating member disposed within the tubular member and in communication with the cutting blade, longitudinal displacement of the actuating member displacing the cutting blade, alternately between the rest position and the working position; an activator coupled to the actuating member to displace the actuating member in response to actions of a user; and a motor coupled to the tubular member to operate the cutting blade about the longitudinal axis of the tubular member by operating the tubular member to cut the bone when the cutting blade is in the working position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 30, 64)
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28. A method for cutting a bone having an intramedullary canal, comprising the steps of:
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providing a tube having a longitudinal axis and a side wall with a slot therethrough; positioning a cutting blade in a rest location within the tube; positioning the tube within the intramedullary canal of the bone; coupling the cutting blade to a motor and an actuating mechanism for moving the cutting blade through the slot; disposing the cutting blade transversely of the longitudinal axis of the tube and through the slot from the rest location to a working location outside the tube and within the bone; and operating the cutting blade about the longitudinal axis of the tube with the motor to cut the bone when the cutting blade is in the working position. - View Dependent Claims (29, 31, 32, 65)
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33. A saw for cutting a bone from within the intramedullary canal of the bone, the saw comprising:
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a tube having a longitudinal axis and a side wall with a slot therethrough, the tube positionable within the bone; a cutting blade positionable through the slot between a rest location within the tube and a working location outside the tube; an actuator to urge the blade radially outwardly through the slot from the rest location toward the work location, transversely to the longitudinal axis of the tube; and a motor coupled to the blade to operate the blade about the longitudinal axis of the tube in the working location to cut the bone. - View Dependent Claims (34, 35, 36, 37, 66)
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38. An intramedullary surgical tool for operating within a bone having an intramedullary canal comprising:
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a torque tube having a longitudinal axis and a side wall with a slot therethrough, the torque tube disposable longitudinally within the intramedullary canal; a cutting blade extendable through the slot from a rest position within the torque tube to a working position outside the torque tube and transverse to the longitudinal axis of the torque tube; an elongate actuating member disposed within the torque tube and in communication with the cutting blade, longitudinal displacement of the actuating member displacing the cutting blade from the rest position through the slot to the working position; an activator coupled to the actuating member for displacing the actuating member in response to actions of a user; and a motor coupled to the torque tube to operate the cutting blade about the longitudinal axis of the torque tube to cut the bone when the cutting blade is in the working position by rotating the torque tube. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 61, 62, 67)
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51. In a motor-powered surgical tool disposable within an intramedullary canal of a bone, a cutting assembly for cutting the bone comprising:
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a user control operable by a user; a motor coupled to the user control; a tube having a longitudinal axis and a side wall with a slot therethrough , the tube positionable within the bone; and a blade member having a cutting edge and coupled to the user control and the motor, the blade member responsive to an action of the user to incrementally extend the cutting edge from a rest position within the tube radially outwardly relative to the longitudinal axis of the tube to a working position through the slot and outside the tube, the cutting edge operable about the longitudinal axis of the tube by the motor to cut the bone when the blade member is in the working position. - View Dependent Claims (52, 53, 54, 55, 56)
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57. In a surgical tool disposable within an intramedullary canal of a bone, a cutting assembly for cutting the bone, comprising:
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a user control operable by a user; a tube having a longitudinal axis and a side wall with a slot therethrough, the tube positionable with the bone; and a blade member having a cutting edge, the blade member coupled to the user control and responsive to an action of the user to incrementally extend the cutting edge from a rest position within the tube radially outwardly relative to the longitudinal axis of the tube to a working position through the slot and outside the tube, the cutting edge operable about the longitudinal axis of the tube by the user to cut the bone when the blade member is in the working position, and wherein the blade member is flexible and has a memory for the rest position. - View Dependent Claims (58, 59, 60)
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Specification