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US 2014/0222005 A1Published application
Surgical resection guide
AssigneeDepuy International Limited
InventorsDEAN COWAN, DUNCAN YOUNG
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AssigneeDepuy International Limited
InventorsDEAN COWAN, DUNCAN YOUNG
Estimating the term…
A surgical resection guide comprising: a housing (36); a stylus arm (38) extending through the housing (36) arranged such that when the housing (36) is coupled to the side of a bone, a tip of the stylus arm (38) is arranged to contact an end of a bone; and a linear adjustment mechanism. The linear adjustment mechanism comprises: a shaft (30) at least partially received within a bore extending through the housing (36) such that the shaft (30) can slide along its longitudinal axis relative to the housing (36), the shaft (30) incorporating a shaft tooth or groove (50); and a dial (44) rotatably coupled to the housing (36) and incorporating a helical dial groove or rib (48) defining a longitudinal axis offset from the longitudinal axis of the shaft (30). The shaft tooth or groove (50) engages the dial groove or rib (48) such that rotating the dial (44) relative to the housing (36) causes the shaft tooth or groove (50) to slide along the dial groove or rib (48) causing the shaft (30) to slide within the bore along its longitudinal axis. The housing (36) and the stylus arm (38) can rotate about the shaft (30) without causing the shaft (30) to slide within its bore along its longitudinal axis. A method of adjusting the surgical resection guide is also disclosed.
A surgical resection guide comprising:
A surgical resection guide according to claim 2, wherein the shaft comprises a shaft tooth formed as a disc shaped flange extending from the periphery of the shaft and the dial comprises a helical groove, the shaft tooth being arranged such that the shaft can rotate about its longitudinal axis independently of sliding of the shaft tooth along the helical groove.
A surgical resection guide according to any one of the preceding claims, wherein the longitudinal axis of the shaft and the longitudinal axis defined by the helical groove are parallel.
A surgical resection guide according to any one of the preceding claims, wherein the helical groove or rib extends around the dial through at most one revolution of the dial.
A surgical resection guide according to any one of the preceding claims, wherein the dial further comprises an annular groove extending around the dial, the linear adjustment mechanism further comprising at least one pin extending through a bore in the housing such that a side surface of the pin engages said annular groove preventing the dial from being withdrawn from the housing.
A surgical resection guide according to any one of the preceding claims, wherein the dial comprises markings spaced apart around the periphery of a portion of the dial external of the housing, the position of the shaft along its longitudinal axis being indicated by the dial markings relative to a predetermined point on the housing.
A surgical resection guide according to any one of the preceding claims, wherein the stylus arm is coupled to the housing such that it can slide through the housing along an axis transverse to the axis of the shaft.
A surgical resection guide according to any one of the preceding claims, wherein an end of the shaft extending from the housing is coupled to a foot arranged to couple to a cutting guide coupled to the bone such that when the dial is rotated about the longitudinal axis of the helical groove the distance between the tip of the stylus arm and the foot along the longitudinal axis of the shaft is varied.
A surgical resection guide according to any one of the preceding claims, further comprises a torsional spring coupled to the housing, a first spring arm of the torsional spring being arranged to contact the stylus arm at a point between the tip of the stylus arm and the housing such that the tip of the stylus arm is biased away from the end of the bone.
A method of adjusting a surgical resection guide, the surgical resection guide comprising:
Dependencies are inferred from the claim text.