Surgical instrument and method for the distraction or compression of bones
First Claim
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1. A surgical instrument for the distraction or compression of bones or bone portions, comprising:
- a pair of elongate cross members pivotally coupled for relative movement having at one end a respective pair of handles and at the other end a respective pair of jaws, said jaws being generally parallel to each other and defining a first plane within which said jaws are relatively movable, the space on both sides of said plane and between said jaws defining a work space;
a pivot coupling said cross members such that as said handles are squeezed together said jaws are drawn together for both distraction and compression; and
a fulcrum supported by at least one of said cross members in a fixed second plane spaced from and generally parallel to said first plane, said fulcrum projecting into said work space and having an axis spaced from said jaws and lying in said second plane.
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Abstract
A surgical instrument for the distraction or compression of bones or bone portions comprises a pair of elongate cross members pivotally coupled for relative movement having at one end a respective pair of handles and at the other end a respective pair of jaws. The jaws are generally parallel to each other and define a first plane within which the jaws are relatively movable, the space on both sides of the plane defining a work space between the jaws. The instrument further comprises a fulcrum supported by at least one of the cross members projecting into the work space and having an axis spaced from the jaws.
176 Citations
28 Claims
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1. A surgical instrument for the distraction or compression of bones or bone portions, comprising:
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a pair of elongate cross members pivotally coupled for relative movement having at one end a respective pair of handles and at the other end a respective pair of jaws, said jaws being generally parallel to each other and defining a first plane within which said jaws are relatively movable, the space on both sides of said plane and between said jaws defining a work space; a pivot coupling said cross members such that as said handles are squeezed together said jaws are drawn together for both distraction and compression; and a fulcrum supported by at least one of said cross members in a fixed second plane spaced from and generally parallel to said first plane, said fulcrum projecting into said work space and having an axis spaced from said jaws and lying in said second plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 25, 26, 27, 28)
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13. A method of selectively compressing or distracting bones or bone portions during surgery comprising the steps of:
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providing a surgical instrument having a pair of jaws pivotally movable relative to each other in a first plane, the space on both sides of said plane and between said jaws defining a work space, the instrument including a fulcrum projecting into said work space, said fulcrum being supported by said instrument in a fixed second plane spaced from and generally parallel to said first plane and having an axis spaced from said jaws and lying in said second plane; and pivotally operating said jaws with said instrument selectively being in a first position or a second position, said fulcrum in said first position being in a first orientation with said jaws being disposed between said fulcrum and the bones or bone portions to cause compression, said second position being the inverse of said first position, said fulcrum in said second position being in a second orientation between said jaws and said bones or bone portions to cause distraction. - View Dependent Claims (14, 15)
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16. A method of selectively compressing or distracting vertebral bodies in a patient during percutaneous surgery, comprising the steps of:
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providing a surgical instrument having a pair of jaws pivotally movable relative to each other in a first plane, the space on both sides of said plane and between said jaws defining a work space, the instrument including a fulcrum projecting into said work space and being supported by said instrument in a fixed second plane spaced from and said first plane, said fulcrum having an axis spaced from said jaws and lying in said second plane; coupling a pair of elongate extensions to one each of respective vertebral bodies of the spine, said extensions each having a length to project outwardly of the exterior surface of said patient; inserting said fulcrum between and in a direction generally transverse to the longitudinal axis of said extensions with said jaws disposed exteriorly of said extensions; and pivotally moving said jaws relatively toward each other to contact said extensions and pivot said extensions about said fulcrum to cause one of compression and distraction of said vertebral bodies, whereby said surgical instrument is placed in a first position to cause compression and is inverted to a second position to cause distraction. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification