Guide apparatus for delivery of an elongate device and methods of use
An apparatus for guiding an elongated flexible instrument comprises a variable-length support assembly. The variable-length support assembly includes a first end, a second end, a plurality of support member pairs, and a plurality of eyelets configured to receive the elongated flexible instrument. Each support member pair comprises a first support member linked to a second support member, and each of the plurality of eyelets is movably coupled to at least one of the plurality of support member pairs along a longitudinal central axis between the first end and the second end. The variable-length support assembly is configured to selectively transition from a compressed configuration to an expanded configuration along the longitudinal central axis, and the plurality of eyelets are adapted to support the elongated flexible instrument as the elongated flexible instrument is advanced along the longitudinal central axis. Each of the plurality of eyelets includes a tapered alignment member configured to contact a tapered alignment member of an adjacent eyelet to move the plurality of eyelets into alignment along the longitudinal axis as the variable length assembly transitions from the expanded configuration to the compressed configuration.
1 . An apparatus for guiding an elongated flexible instrument, the apparatus comprising:
a variable-length support assembly including:
a first end;
a second end, wherein a longitudinal central axis extends between the first end and the second end;
a plurality of eyelets configured to receive the elongated flexible instrument and configured to pivot with respect to the longitudinal central axis; and
a plurality of alignment members configured to align the plurality of eyelets along the longitudinal central axis, wherein a first alignment member of the plurality of alignment members has a proximal end and a distal end and is fixed at the proximal end with respect to a first eyelet of the plurality of eyelets,
wherein the variable-length support assembly is configured to transition from a compressed configuration to an expanded configuration along the longitudinal central axis.
2 . The apparatus of claim 1 , wherein the variable-length support assembly further includes:
a plurality of support member pairs including a first support member pair comprising a first support member linked to a second support member, wherein the first support member intersects the second support member and is connected to the second support member by a central hinge disposed along the longitudinal central axis.
3 . The apparatus of claim 2 , wherein the central hinge comprises a pin joint.
4 . The apparatus of claim 2 , wherein the first eyelet of the plurality of eyelets is movably coupled to the first support member pair at the central hinge.
5 . The apparatus of claim 4 , wherein the first eyelet is rotatably coupled to the first support member and the second support member by the central hinge.
6 . The apparatus of claim 4 , wherein the first eyelet is positioned within the first support member and is rotatable about a vertical axis extending through the central hinge.
7 . The apparatus of claim 2 , wherein adjacent support member pairs of the plurality of support member pairs are connected to each other by outer hinges.
8 . The apparatus of claim 2 , wherein at least one alignment member of the plurality of alignment members comprises an elongate bar extending laterally from the respective eyelet.
9 . The apparatus of claim 8 , wherein the first and second support members include indentations having a corresponding shape to the elongate bar, wherein the elongate bar is sandwiched between the indentations of the first and second support members when the variable-length support assembly assumes the compressed configuration.
10 . The apparatus of claim 8 , wherein the first alignment member terminates in a protrusion.
11 . The apparatus of claim 10 , wherein the first and second support members include indentations having a corresponding shape to the protrusion, wherein the protrusion is sandwiched between the indentations of the first and second support members when the variable-length support assembly assumes the compressed configuration.
12 . The apparatus of claim 8 , wherein the first alignment member comprises a forked linkage extending between the first eyelet and the first and second support members.
13 . The apparatus of claim 1 , further comprising a proximal coupler at the first end of the variable-length support assembly, the proximal coupler configured to couple the variable-length support assembly to an instrument interface portion.
14 . The apparatus of claim 13 , further comprising a proximal arm synchronizing assembly coupled to the proximal coupler and the variable-length support assembly, the proximal arm synchronizing assembly configured to increase the stability of a connection between the proximal coupler and the variable-length support assembly.
15 . The apparatus of claim 13 , further comprising a latch mechanism coupled to the proximal coupler, the latch mechanism configured to selectively retain the variable-length support assembly in the compressed configuration.
16 . The apparatus of claim 1 , further comprising a distal coupler at the second end of the variable-length support assembly, the distal coupler configured to couple the variable-length support assembly to an anchor in a surgical field.
17 . The apparatus of claim 1 , wherein the first alignment member of the plurality of alignment members comprises a magnet.
18 . The apparatus of claim 17 , wherein the variable-length support assembly further includes:
a plurality of support member pairs including a first support member pair comprising a first support member linked to a second support member, the first support member intersecting the second support member and being connected to the second support member by a central hinge disposed along the longitudinal central axis, wherein a first eyelet of the plurality of eyelets is movably coupled to the first support member pair at the central hinge.
19 . The apparatus of claim 17 , wherein a second alignment member of the plurality of alignment members comprises a second magnet, and wherein the magnet is coupled to a first eyelet of the plurality of eyelets and the second magnet is coupled to a second eyelet of the plurality of eyelets, the second eyelet being adjacent to the first eyelet.
20 . The apparatus of claim 17 , wherein the first alignment member comprises a pair of magnets, including the magnet, each coupled to a respective eyelet of a pair of adjacent eyelets.