Measurement instrument for use in orthopaedic surgery
First Claim
1. A surgical instrument for taking measurements during orthopaedic surgery, said instrument comprising:
- a first reference element having a first outwardly facing registry surface;
a second reference element having a second outwardly facing registry surface, said first and second reference elements being substantially disposed in a space located between said first and second outwardly facing registry surfaces;
at least one measurement guide having indicia correlated to at least one linear distance between the first and second registry surfaces at a first location and at least one measurement correlated to a relative angular orientation of said first and second registry surfaces; and
at least one biasing element biasing said first and second reference elements apart from each other, said measurement guide contemporaneously responding to relative movement of said first and second reference elements as said first and second elements are biased apart.
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Accused Products
Abstract
A surgical instrument for taking measurements during orthopaedic surgery such as knee replacement procedures. The instrument includes two reference elements which each have an outwardly facing registry surface. The instrument includes a measurement guide which has indicia related to a linear distance between the two registry surfaces and an angular orientation between the two registry surfaces. The reference elements are biased apart and the measurement guide responds contemporaneously with the relative movement of the two reference elements. One of the registry surfaces may be an articulating surface for engagement with a provisional femoral component. The instrument may include a housing from which two elongate members are biasingly projected to support one of the reference elements and the indicia corresponding to the angular orientation of the two registry surfaces may be a second linear measurement corresponding to the distance between the two registry surfaces at a second location.
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Citations
18 Claims
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1. A surgical instrument for taking measurements during orthopaedic surgery, said instrument comprising:
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a first reference element having a first outwardly facing registry surface;
a second reference element having a second outwardly facing registry surface, said first and second reference elements being substantially disposed in a space located between said first and second outwardly facing registry surfaces;
at least one measurement guide having indicia correlated to at least one linear distance between the first and second registry surfaces at a first location and at least one measurement correlated to a relative angular orientation of said first and second registry surfaces; and
at least one biasing element biasing said first and second reference elements apart from each other, said measurement guide contemporaneously responding to relative movement of said first and second reference elements as said first and second elements are biased apart. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A surgical instrument for taking measurements during orthopaedic surgery, the measurements being taken in reference to an orthopaedic implant, said instrument comprising:
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a first substantially planar reference element having an outwardly facing first registry surface;
a second reference element having an outwardly facing second registry surface, said second registry surface defining an articulating surface articulatingly engageable with the orthopaedic implant;
at least one measurement guide having indicia correlated to a relative position of said first registry surface with respect to said second registry surface; and
at least one biasing element biasing said first and second reference elements apart from each other, said at least one measurement guide contemporaneously responding to relative movement of said first and second reference elements as said first and second elements are biased apart. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A surgical instrument for taking measurements during orthopaedic surgery, the measurements being taken in reference to an orthopaedic implant, said instrument comprising:
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a first reference element having a first outwardly facing registry surface;
a second reference element moveable relative to said first reference element along a longitudinal direction, said second reference element having a second outwardly facing registry surface;
at least one measurement guide having indicia correlated to a relative position of said first registry surface with respect to said second registry surface; and
at least one biasing element longitudinally biasing said second reference element away from said first reference element, said at least one measurement guide contemporaneously responding to relative movement of said first and second reference elements as said first and second elements are biased apart. - View Dependent Claims (15, 16, 17, 18)
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Specification