摘要:
A tissue disruption device (10) for deployment via a rigid conduit (100) includes a rotary tissue disruptor (12) insertable along the conduit with its axis of rotation (14) parallel to the direction of conduit elongation (16). An angular displacement mechanism allows selective displacement of the rotary tissue disruptor (12) such that the axis of rotation (14) sweeps through a range of angular motion. A rotary drive is linked to the rotary tissue disruptor so as to drive the rotary tissue disruptor in rotary motion while the rotary tissue disruptor is at a range of angular positions within the range of angular motion.
摘要:
The present invention relates to a device for introduction into a body, the device assuming within the body a predefined shape, the device comprising: an elongated element (10) formed primarily from a plurality of segments (12) sequentially interconnected so as to form an effective hinge (14) between adjacent of the segments; and a substantially straight elongated-element-restricting structure (20) fitting to the shape of said elongated element in a straightened configuration; wherein the segments and the effective hinges are configured such that: (a) when the elongated element is confined to a substantially straight state, the effective hinges transfer compressive forces from one segment to the next so that the elongated element can be pushed so as to advance along said elongated-element-restricting structure (20); and (b) when the elongated element is not confined by said elongated-element-restricting structure (20), the effective hinges allow deflection of one segment relative to the next segment until at least one abutment surface of each segment comes into abutment with at least one corresponding abutment surface of the next segment, thereby defining a fully flexed state of the elongated element, the fully flexed state corresponding to a predefined shape of the elongated element.
摘要:
A conic retractor for retraction of tissue of a mammal may comprise an at least partially hollow first truncated cone (20); a second truncated cone (30), having a similar apex angle and whose opening is wider than the first truncated cone, may be configured to at least partially enter the first truncated cone and to dilate at least a distal end of the first truncated cone as it is pushed to the distal end of the cone. A third truncated cone (40) can be inserted into the second truncated cone, etc. Cones can be dilated by having a longitudinal slit (29) or overlapping longitudinal wall surface edges, or by the nature of the material the cones are made of.
摘要:
An anchoring element, such as a bone screw, may comprise an at least partially threaded shaft having a core and a longitudinal channel. An elongated element movable with the channel may be a tensioning element, for example affixed to the distal portion, and/or a rigid element. The core may have one or more lateral cut-outs, which may be V-shaped, at the distal portion. Each cut-out may be backed, by an effective hinge that may be displaced from the longitudinal axis, and may have a transverse slit between the hinge and an opposite surface of the core from the cut-out. Upon axial movement of the elongated element, e.g. toward a proximal end of the shaft, the distal portion may deflect to an angle from the shaft's longitudinal axis. Alternatively, the anchoring element may be pre-biased to deflect and maintained straight by a rigid element until axial movement of the rigid element.
摘要:
A device comprising an elongated conduit comprising further at least an upper profile and at least a lower profile is disclosed. The upper and lower profiles being relatively displaceable such that when a distal part of the conduit is deployed between two regions of tissue, a spacing between an upper distal surface of the upper profile and a lower distal surface of the lower profile can be varied, thereby opening a space between the two regions of tissue, and wherein the upper and lower profiles are further configured so as to define therebetween a working channel to provide access to the space between the two regions of tissue through the conduit.
摘要:
An implant for orthopedic surgery includes an impaling member (101,102), which is separable into portions (102a, 102b) for impaling and attaching to tissue, for example, bone. Once the portions (102a, 102b) of the impaling member (101,102) are separated and attached to the requisite tissue, they may accommodate stabilizing members for fixation, or other instrumentation for procedures such as fusion.
摘要:
The present invention concerns a device for introduction into a body along a substantially straight elongated-element-restricting structure (20), the device assuming within the body a predefined curved configuration, the device comprising: an elongated element (10) formed primarily from a plurality of segments (12) sequentially interconnected so as to form an effective hinge (14) between adjacent of the segments (14), the segments (14) and the effective hinges (14) being configured such that: (a) when the elongated element (10) is confined to a substantially straight state, the effective hinges (14) transfer compressive forces from each segment (14) to the next so that the elongated element (10) can be pushed so as to advance through the substantially straight elongated-element-restricting structure (20); and when the elongated element (10) is not confined to a substantially straight state, the effective hinges (14) allow deflection of each segment (14) relative to adjacent segments (14) until at least one abutment surface (16) of each of the segments (14) comes into abutment with at least one corresponding abutment surface (18) of each adjacent segment (14), thereby defining a fully flexed state of the elongated element (10), the fully flexed state corresponding to a predefined curved configuration of the elongated element (10).
摘要:
An inter- level locking mechanism of a multi- level medical device is disclosed. The locking mechanism includes (a) an elongated element ( 100 ) having a plurality of flexing regions, wherein the elongated element assumes a straightened configuration for introduction into the body, and wherein the elongated element assumes a closed helix configuration with a first portion of the elongated element coming in overlapping contact with a second portion of the elongated element in the closed helix configuration, and (b) at least one locking element deployable so as to interconnect the first and second portions of the elongated element so as to tighten together the overlapping portions of the elongated element, thereby stabilizing the closed helix configuration.
摘要:
An expanding implant (600) for insertion between first and second regions of hard tissue, the implant comprising: (a) a backbone (630) having a surface for contacting the first region of hard tissue, said backbone comprising a proximal portion (688a) and a distal portion (688b), said backbone assuming an initial length and being shortened towards a second length by relative movement of said proximal portion and said distal portion; (b) a first segment (640c) hingedly connected to a distal region of said distal portion (688b) of said backbone; (c) a second segment (640a) hingedly connected to a proximal region of said proximal portion (688a) of said backbone; and (d) an intermediate segment (640b) having a surface for contacting the second region of hard tissue, said intermediate segment being hingedly connected to said first segment and to said second segment such that shortening of said backbone from said initial length towards said second length causes an increase in a distance between said surfaces of said backbone and said intermediate segment, and wherein said intermediate segment and said backbone are each formed with openings (623) through said respective surfaces, said openings providing at least one unobstructed path between the first and second regions of hard tissue.