Expandable support device and method of use

A method of retrieving a deployed expandable support device from a bone, wherein the deployed expandable support device is in a radially expanded configuration, and wherein the expandable support device has pushed through a portion of the bone, comprising:

• expanding the expandable support device in the bone, wherein the expandable support device has a circular cross-section before the expanding of the expandable support device in the bone, wherein a distal terminal end of the expandable support device tapers radially inward;
• attaching to the expandable support device, wherein the expandable support device is fixed in the bone at least by pressing a first strut having a first ridge and a second strut having a second ridge of the expandable support device into the bone, wherein the first strut has a first strut first end and a first strut second end, wherein the second strut has a second strut first end and a second strut second end, wherein the first strut second end is connected to the second strut first end, wherein the first strut first end is closer to a proximal terminal end of the device than the second strut first end, wherein the first and second ridges extend radially outward relative to the proximal terminal end of the device when the device is in a radially contracted configuration, wherein the first ridge is a first portion of a helical ridge of the device, wherein the second ridge is a second portion of the helical ridge of the device, wherein when the device is in a fully expanded configuration, the first ridge or the second ridge defines a radial outermost point of the device, and wherein when the device is in a fully contracted configuration, an outer diameter of the proximal terminal end of the device is less than an outer diameter of a longitudinally medial portion of the device, wherein when the device is in the fully contracted configuration, the first strut has a first strut first cross-sectional shape perpendicular to a device longitudinal axis and has a first strut second cross-sectional shape perpendicular to the device longitudinal axis, and wherein the first strut first cross-sectional shape is different than the first strut second cross-sectional shape;
• holding the expandable support device;
• and
• translating the expandable support device into a sheath, wherein translating the expandable support device comprises longitudinally tensioning the expandable support device and radially contracting the expandable support device.

A method of retrieving a deployed expandable support device from a bone, wherein the deployed expandable support device is in a radially expanded configuration, and wherein the expandable support device has pushed through a portion of the bone, comprising:

• expanding an expandable length of the expandable support device in the bone with a deployer engaged with a key, wherein the expandable support device has a circular cross-section before the expanding of the expandable support device in the bone, and wherein when the device is in a contracted configuration, an outer diameter of a proximal terminal end of the device is less than an outer diameter of a longitudinally medial portion of the device;
• attaching to the expandable support device, wherein the expandable support device is fixed in the bone at least by pressing a first strut having a first ridge, a second strut having a second ridge, a third strut having a third ridge, and a fourth strut having a fourth ridge of the expandable support device into the bone, wherein the first strut has a first strut first end and a first strut second end, wherein the second strut has a second strut first end and a second strut second end, wherein the third strut has a third strut first end and a third strut second end, wherein the fourth strut has a fourth strut first end and a fourth strut second end, wherein the first strut first end and the fourth strut first end are connected to each other, wherein the first strut second end is connected to the second strut first end, wherein the fourth strut second end is connected to the third strut first end, wherein the second strut second end and the third strut second end are connected to each other, wherein when the device is in a fully radially expanded configuration, the first, second, third, and fourth struts define a first cell in the longitudinally medial portion of the device, wherein the first ridge extends radially outward relative to the proximal terminal end of the device when the device is in the fully radially expanded configuration, wherein the first ridge is a portion of a first helical ridge of the expandable length, wherein the first helical ridge is defined by first and second edges angled relative to one another, wherein when the device is in the fully radially expanded configuration, the first ridge defines a radial outermost point of the device, wherein when the device is in a fully radially contracted configuration, the expandable length has a second helical ridge extending radially inward, and wherein when the device is in the fully radially contracted configuration, the first strut comprises a variable cross-section long a length of the first strut, and wherein the variable cross-section is perpendicular to a device longitudinal axis;
• holding the expandable support device;
• and
• translating the expandable support device into a sheath, wherein translating the expandable support device comprises longitudinally tensioning the expandable support device and radially contracting the expandable support device.