摘要:
A surgical tool for deploying an implant includes an elongate outer shaft having a proximal end, a distal end and a central channel therebetween. An elongate inner shaft is at least partially slidably received in the central channel and an actuator mechanism is operatively coupled with either the outer or inner shaft. The tool also includes a piercing element that is coupled with the outer shaft and releasably coupled with the implant.
摘要:
A system for restricting spinal flexion includes superior and inferior tether structures joined by a pair of compliance members. Compliance members comprise tension members which apply a relatively low elastic tension on the tether structures. By placing the tether structures on or over adjacent spinous processes, flexion of a spinal segment can be controlled in order to reduce pain.
摘要:
The tightening instrument is made up of two parts (2,4) joined to each other by means which are designed to automatically uncouple the said two parts (2,4) by shearing rupture of a pin (8) when a predetermined tightening torque is reached, a first (2) of the two parts being provided with a means (3) permitting driving, characterized in that the second (4) of the two parts is a rod whose end (5) opposite its tightening end (6) is adapted to be introduced into a complementary recess (7) formed in the first part (2), and in that the said end (5) includes an axial reservoir (15) for receiving the broken end section (18) of the pin (8).
摘要:
Devices and methods include an anchor assembly engageable to a vertebra and a connecting element positionable through a receiver of the anchor assembly. The receiver includes a body extending along a longitudinal axis that defines an axial bore extending longitudinally therein and opening at least distally and a trans-axial bore that opens in opposite sides of the receiver. The connecting element can be positioned through the trans-axial bore in an endwise manner through the receiver. The side openings of the trans-axial bore are encompassed by the body of the receiver on all sides of each opening.
摘要:
A method includes moving a spinal implant such that a central portion of the spinal implant is disposed between adjacent spinous processes, radially extending a proximal portion of the spinal implant on a first side of the adjacent spinous processes such that movement of the proximal portion between the adjacent spinous processes is inhibited, and radially extending a distal portion of the spinal implant on a second side of the adjacent spinous processes opposite the first side such that movement of the distal portion between the adjacent spinous processes is inhibited.
摘要:
In one embodiment, an apparatus includes a projection having a tapered end portion configured to be inserted percutaneously through tissue. A measurement member is coupled to the projection and is configured to indicate a distance between adjacent anatomical structures. In another embodiment, an apparatus includes a measurement member configured to be percutaneously inserted between adjacent anatomical structures. The measurement member includes a wedge portion that is configured to contact the adjacent anatomical structures when the measurement member is moved distally between the adjacent anatomical structures. A size indicator is coupled to the wedge portion. The size indicator has a plurality of markings and is configured to be viewed on an image of the adjacent anatomical structures with the wedge portion of the measurement member disposed between the adjacent anatomical structures to indicate a distance between the adjacent anatomical structures.
摘要:
An apparatus includes a projection having a sharpened end portion configured to be inserted through an annulus of an intervertebral disc to define a distracted volume in the annulus. An expandable member is coupled to the projection and defines a longitudinal axis. The expandable member is configured to be expanded from a collapsed configuration to an expanded configuration in a direction substantially perpendicular to the longitudinal axis when at least a portion of the expandable member is disposed within the distracted volume of the annulus of the intervertebral disc. When the expandable member expands, it defines an expanded volume and defines a cross-sectional perimeter while in the expanded configuration. A cannula is configured to be at least partially inserted into the expanded volume. The cannula defines a cross-sectional outer perimeter having no portion extending outside of the cross-sectional perimeter of the expandable member while in its expanded configuration.
摘要:
An apparatus includes a shaft, a rod, a portion of which is disposed within the shaft, a first knob and a second knob. The first knob is coupled to the shaft and configured to engage the rod such that the rod translates within the shaft when the first knob is rotated. The second knob is coupled to the rod such that the rod rotates within the shaft when the second knob is rotated.
摘要:
Systems and methods for directionally controlling expansion of an expandable device are described. One such device includes an expandable body comprising a first wall portion and a second wall portion. The first wall portion comprises a high elasticity material. The second wall portion comprises a material having an elasticity lower than the elasticity of the first wall portion. When the body is expanded, expansion of the second wall portion is constrained more than expansion of the first wall portion. Expansion of the body is directed outwardly from the high elasticity first wall portion. Such a device is useful for providing cavities in interior body regions.
摘要:
Disclosed are products, systems, and methods for delivering a material to an internal body part such as bone. In one variation, the product comprises a segmented plunger having a plurality of segments, where the plurality of cylindrical segments are sized for urging a material through an access member to thereby deliver the material to predetermined location in a subject's body. The segmented plunger may be used with a catheter for delivering a bone filler or a bone cement to a bone requiring repair.