초록 ▼

An endoscopic surgical instrument for deploying a two part fastener having a male fastener part and a female fastener part, includes a tube having a proximal end and a distal end. An end effector is coupled to said distal end of said tube and is configured to hold the male fastener part and the fema

An endoscopic surgical instrument for deploying a two part fastener having a male fastener part and a female fastener part, includes a tube having a proximal end and a distal end. An end effector is coupled to said distal end of said tube and is configured to hold the male fastener part and the female fastener part in opposed relation. An actuator is coupled to said proximal end of said tube and is configured to actuate the end effector. A shearing device may be positioned proximate the end effector to shear off a tip of the male fastener part after the male and female fastener parts are moved into locking relation. In addition, the surgical instrument may include a male fastener part having a shaft with a plurality of detent positions. Further, the male fastener part may include a base and a shaft pivotally connected to the base.

대표청구항 ▼

An endoscopic surgical instrument for deploying a two part fastener having a male fastener part and a female fastener part, includes a tube having a proximal end and a distal end. An end effector is coupled to said distal end of said tube and is configured to hold the male fastener part and the fema

An endoscopic surgical instrument for deploying a two part fastener having a male fastener part and a female fastener part, includes a tube having a proximal end and a distal end. An end effector is coupled to said distal end of said tube and is configured to hold the male fastener part and the female fastener part in opposed relation. An actuator is coupled to said proximal end of said tube and is configured to actuate the end effector. A shearing device may be positioned proximate the end effector to shear off a tip of the male fastener part after the male and female fastener parts are moved into locking relation. In addition, the surgical instrument may include a male fastener part having a shaft with a plurality of detent positions. Further, the male fastener part may include a base and a shaft pivotally connected to the base. 1. An apparatus for implanting into a bone in a patient's spine or pelvis, said apparatus, when implanted, being resistant to toggling in the bone and to being pulled from the bone, said apparatus comprising: a platform for engaging a bone in a patient's spine or pelvis, said platform having a first surface that is solid and that extends generally transverse to a longitudinal axis of said apparatus, said platform including structure for connection to a spinal fixation implant; and at least one helical spike for embedding into the bone upon rotation of said platform, said at least one helical spike projecting tangentially from said first surface of said platform and extending around said longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the bone as said platform is rotated; said at least one helical spike, when implanted, having a conical shape that increases in diameter as said at least one helical spike extends away from said platform. 2. The apparatus of claim 1, wherein said at least one helical spike has a first condition in which said at least one helical spike has a first maximum diameter and a second condition in which at least a portion of said at least one helical spike expands to a second maximum diameter that is larger than said first maximum diameter. 3. The apparatus of claim 2 wherein said at least one helical spike has a first axial length in said first condition and a second axial length in said second condition, said second axial length being smaller than said first axial length. 4. The apparatus of claim 3 wherein at least a portion of said at least one helical spike is made of a shape memory alloy that is responsive to changes in temperature above and below a predetermined temperature transition range, said at least one helical spike being in said first condition when the temperature of said at least one helical spike is below said predetermined temperature transition range, said at least one helical spike being in said second condition when heated above said predetermined temperature transition range, said at least one helical spike being implanted into the bone in said second condition. 5. The apparatus of claim 4 wherein said at least one helical spike further has a connecting portion at a proximal end connected to said platform and an intermediate portion extending between said connecting,portion and said tip portion, at least one of said intermediate portion and said tip portion being made of said shape memory alloy. 6. The apparatus of claim 5 comprising a pair of helical spikes extending around said longitudinal axis, said proximal ends of said pair of helical spikes being spaced 180° apart. 7. The apparatus of claim 5 comprising three helical spikes extending around said longitudinal axis, said proximal lends of said three helical spikes being spaced 120° apart. 8. The apparatus of claim 1 wherein said first surface has a shape that is complimentary to the shape of an outer surface of the bone for engaging the outer surface of the bone. 9. The apparatus of claim 1 wherein said at least one helical spike has a solid cross-section. 10. The apparatus of claim 1 wherein said at least one helical spike has a tubular cross-section. 11. The apparatus of claim 1 wherein a first portion of said at least one helical spike has a solid cross-section and a second portion of said at least one helical spike has a tubular cross-section. 12. An apparatus comprising: at least one anchor for implantation into a bone, said at least one anchor having a longitudinal axis and, when implanted, being resistant to toggling in the bone and to being pulled from the bone; and a spinal fixation implant for extending between and connecting a plurality of bones; said at least one anchor including a platform having a first surface for facing the bone, said first surface being solid and extending generally transverse to said longitudinal axis, said platform fur ther having structure for connection with said spinal fixation implant; said at least one anchor further including at least two helical spikes for embedding into the bone upon rotation of said platform, said at least two helical spikes projecting tangentially from said first surface on said platform and extending around said longitudinal axis, each of said at least two helical spikes having a tip portion at a distal end which penetrates into the bone as said platform is rotated; said at least two helical spikes, when implanted, having a conical shape that increases in diameter as said at least two helical spikes extend away from said platform. 13. The apparatus of claim 12 comprises a first anchor for implantation into a first bone and a second anchor for implantation into a second bone spaced from said first bone. 14. The apparatus of claim 13 wherein each of said first and second anchors extends co-linearly along said longitudinal axis, said at least two helical spikes that project from said first surface of said platform of said first anchor extending in a first direction, said at least two helical spikes that project from said first surface of said platform of said second anchor extending in a second direction opposite said first direction. 15. The apparatus of claim 14 wherein said spinal fixation implant comprises a member extending along said longitudinal axis and interconnecting said first and second anchors. 16. An apparatus for implantation into a bone in a patient's spine or pelvis, said apparatus, when implanted, being resistant to toggling in the bone and to being pulled from the bone, said apparatus comprising: a platform for facing a bone in a patient's spine or pelvis, said platform having a first surface that is solid and that extends generally transverse to a longitudinal axis of said apparatus, said platform including structure for connection to a spinal fixation implant; and at least one helical spike for embedding into the bone upon rotation of said platform, said at least one helical spike projecting tangentially from said first surface of said platform and extending around said longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the bone as said platform is rotated; said at least one helical spike having a first condition in which said at least one helical spike has a first maximum diameter and a second condition in which at least a portion of said at least one helical spike expands to a second maximum diameter that is larger than said first maximum diameter. 17. The apparatus of claim 16 wherein said at least one helical spike has a first axial length in said first condition land a second axial length in said second condition, said second axial length being smaller than said first axial length. 18. The apparatus of claim 17 wherein at least a portion of said at least one helical spike is made of a shape memory alloy that is responsive to changes in temperature above and below a predetermined temperature transition range, said at least one helical spike being in said first condition when the temperature of said at least one helical spike is below said predetermined temperature transition range, said at least one helical spike being in said second condition when heated above said predetermined temperature transition range, said at least one helical spike being implanted into the bone in said second condition. 19. The apparatus of claim 18 wherein said at least one helical spike, when implanted, has a conical shape that increases in diameter as said at least one helical spike extends away from said platform. 20. The apparatus of claim 19 wherein said at least one helical spike further has a connecting portion at a proximal end connected to said platform and an intermediate portion extending between said connection portion and said tip portion, at least one of said intermediate portion and said tip portion being made of said shape memory a