摘要:
Deflectable implants, systems and methods for implanting deflectable implants are disclosed. The deflectable implant (100) includes at least one sequence of segments (102), the sequence includes at least two segments (102), the segments (102) being interconnected at effective hinges (107), the sequence assuming a straightened or low curvature insertion state for insertion into the body, the sequence being deflectable to a fully deflected state defined by abutment of abutment features of adjacent of the segments (102). The deflectable implant (100) includes further a linkage mechanically linked to at least part of at least one of the sequences of segments (102) for deflecting the at least one sequence of segments (102) from the insertion state towards the fully deflected state wherein the at least one sequence is at least part of a loop structure assuming a low profile folded state with the at least one sequence towards the fully deflected state generates an open state of the loop structure and wherein the loop defines an enclosed volume (106).
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:
A spinal surgery tool system including an elongated conduit and an implant is disclosed. The implant assumes a straight configuration within the elongated conduit and is deployable from the elongated conduit into a closed or nearly-closed loop configuration for deployment interposed between two tissue surfaces to define an enclosed volume. The conduit and the implant are configured such that, when the implant is deployed in the loop configuration, an opening formed in a proximal portion of the implant forms a contiguous channel with a passageway along the conduit so as to provide a continuous access channel along the elongated conduit into the enclosed volume.
摘要:
A device for removing material from within the body, includes an elongated element formed from hollow segments sequentially interconnected at effective hinges. The device assumes an insertion configuration for insertion of the segments sequentially through an opening of a first dimension into the body. A portion of the elongated element inserted into the body progressively assumes a material removing configuration in which a relative position of each segment relative to an adjacent segment is delineated by the effective hinge together with additional abutment surfaces defining a fully deflected state of the effective hinge. The material removing configuration has at least two dimensions exceeding the first dimension. At least two of the segments are formed with at least one opening, typically provided with a cutting configuration, deployed so as to receive material into a hollow volume of the segment during progressive formation of the material removing configuration as the elongated element is advanced.
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:
An apparatus for tissue separation comprises a hollow retractor expandable in at least one dimension, the retractor having upper and lower guide surface portions for contacting respective upper and lower tissue surfaces; a first dilator having a distal portion configured to fit inside the upper and lower guide surface portions of the retractor so as to expand a distance between the upper and lower guide surface portions of the retractor and thereby separate the upper and lower tissue surfaces by a first distance; and a second dilator having a distal portion configured to fit inside the upper and lower guide surface portions of the retractor so as to expand a distance between the upper and lower guide surface portions of the retractor and thereby render the upper and lower tissue surfaces being separated by a second distance, the second distance greater than the first distance.
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 invention involves a siphon for delivery of a liquid cryogen from a container such as a Dewar flask. The siphon ensures delivery of a liquid cryogen with a lower proportion of the gaseous fraction. The siphon comprises a central feeding conduit, which is largely contained within the Dewar flask. There is an auxiliary conduit surrounding the central feeding conduit; the outer upper section of this auxiliary conduit is provided with an adjustable valve intended to release a gaseous fraction of the cryogen contained in the annular gap between the auxiliary and central feeding conduits. The upper section of the central feeding conduit is provided with an external layer of a porous capillary coating or with a wick; this ensures that the upper section of the central feeding conduit is continuously wetted with the liquid cryogen. This porous capillary coating prevents gasification of the liquid cryogen in the central feeding conduit. Alternatively, the problem of liquid cryogen gasification may be solved through thermal insulation of the central feeding conduit.
摘要:
A cryoprobe supports administration of an active agent to a location of cryogenic treatment. The cryoprobe may optionally be combined with a syringe to form a cryoprobe system; alternatively and optionally, the syringe may be external to the cryoprobe.
摘要:
A cryoprobe for surgical and other treatments. The cryoprobe comprises an expandable section that performs displacement of a distal cryotip forwards when there is elevation of the operation pressure in the interior of the cryoprobe. Needle-wise metal elements are installed on the external side of the cryotip. These needle-wise elements are deflecting outwards by a deflecting member fastened on the distal edge of an external shaft of the cryoprobe. This allows a significant enlargement of the frozen volume of the treated tissue with the same operation temperature and the outer diameter of the cryoprobe. In another embodiment, the needle elements are formed in a displaceable metal sheath and a distal section of a cryotip and/or special protrusions on this distal section act as the deflecting member.