The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen.

Devices and methods for transforming a covered retrieval device from a deployed position to a delivery position for re-use are disclose herein. A retractor device may include, for example, a tubular structure defining a channel and configured to slidably receive a retrieval device. A method for transforming a retrieval device may include, for example, (a) positioning a retrieval device in a deployed position within a channel of a retractor device, (b) securing a part of the cover against a surface of the retractor, and (c) while securing the cover, advancing the retrieval device distally through the tubular structure to expose a capture structure of the retrieval device.

Methods and apparatuses for mechanically removing objects from a body. In particular, described herein are thrombectomy methods and mechanical thrombectomy apparatuses for removal of blood clots from within a lumen of a blood vessel.

Described herein are methods using mechanical inverting tube apparatuses to remove clot (e.g., thrombectomy), the apparatuses including an inversion support catheter having an expandable funnel-shaped distal end, and a flexible tube that can be continuously rolled over the funnel-shaped distal end and invert into the inner lumen of the inversion support catheter.

Mechanical thrombectomy apparatuses, and particularly knitted rolling tube mechanical thrombectomy apparatuses configured to have improved tracking for delivery through tortious vessels are described herein. Also described herein are methods of removing clots using a mechanical thrombectomy apparatuses in which the clot is larger than the tractor portion of the mechanical thrombectomy apparatus.

A device for capturing an obstruction in a vasculature can include an expandable braid, an invertible braid, and elongated members such as tubes or wires that can be moved to cause the expandable braid to expand and the invertible braid to form a pocket facing toward the expandable braid to thereby capture the obstruction within the pocket. The expandable braid can form a cap at an open end of the pocket so that the pocket and cap define a cavity in which the obstruction can be confined. The device can also have an expandable framework between the expandable braid and the invertible braid that can engage the obstruction to further secure the obstruction between the expandable braid and invertible braid.

Everting balloon systems and methods for using the same are disclosed herein. The systems can be configured to access and dilate body lumen and cavities. For example, the systems can be used to dilate the cervix and access the uterine cavity. The systems can also be used to occlude the cervix. The systems can also be used to occlude the urethra.

The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen.

A system for assisting in the retrieval of a clot from a vessel. The system can include an outer catheter and an inner catheter disposed in a lumen of the outer catheter. The inner catheter can include a distal end, a proximal end, a distal segment, a proximal segment, and a lumen extending proximal of the distal end and terminating at a transfer port at the proximal end of the distal segment. A seal is located on the outer surface of the inner catheter distal of the transfer port, the seal capable of sealing against the lumen of the outer catheter so that aspiration applied through the outer catheter is configured to be transferred to the inner catheter.

A cannula for use in a surgical procedure includes a tubular shaft and a tether coupled to a distal end portion of the tubular shaft. The distal end portion of the tubular shaft is configured to turn inside out in response to a threshold proximally-oriented force applied to the tether. Sections of the distal end portion may break apart or separate from one another about a groove formed in the tubular shaft.