Abstract: A catheter includes: a tube having a distal end, a proximal end, and a tube body extending between the distal end and the proximal end, the tube having a tube wall and a first channel in the tube wall; a first elongated element located in the first channel of the tube, the first elongated element slidably moveable in the first channel relative to the tube wall; and a suction port configured to apply suction in the first channel; wherein a first part of the tube wall is configured to deform to apply a first force against the first elongated element in response to the suction in the first channel.

Abstract: Devices and methods for collecting tissue fragments of variable sizes from a surgical site are described herein. The devices can include at least two filters having a different pore size for the collection and sorting of tissue fragments by size.

Abstract: A flexible, polymer sleeve is provided that is everted into a body passageway in such a manner as to exert minimal rubbing friction on the internal walls of such passageway. The sleeve is housed within a tube assembly comprising a posterior tube that telescopingly slides into an insertion tube. The sleeve everts over the insertion tube, upon forward pressure applied thereon, as it extends forward into a body passageway, and consequently, causes the posterior tube to retract into the insertion tube. Multiple tubes can be telescoped to support the polymer sleeve and to keep a passageway open for the expelling of urine or body fluids, the insertion of tools, sanitation/antibacterial substances, or for the flow of liquids through the sleeve. The insertion tube can be locked in reference to the sleeve to prevent unintended removal of catheter assembly. Sleeve and tubing are removed by reversing the insertion and eversion movements.