Abstract: Disclosed herein are catheters having multiple coil layers, and associated systems and methods. In some embodiments, a catheter includes an inner liner, a plurality of wires over the inner liner, and an outer sheath over the wires. The wires are coiled about a longitudinal axis of the catheter in a first direction to form a first coil layer over the inner liner, and the wires are coiled about the longitudinal axis in a second direction, opposite the first direction, over the first coil layer to form a second coil layer over the first coil layer. The wires each include a continuous/self-terminating end portion wherein the wire switches from the first direction to the second direction and transitions from the inner coil layer to the outer coil layer.

Abstract: A therapeutic eye and eyelid cover provides heated saturated air to the covered tissue and a transparent front (18, 19) to enable clear vision during use. The cover includes heating means (17) and means (22) for saturating the air enclosed against the face with water vapor, preventing evaporation from the eye and eye lids and enhancing heat transfer to the covered tissue. The transparent front is constructed to prevent condensation and maintain clear vision at all times during use.

Abstract: A therapeutic eye and eyelid cover provides heated saturated air to the covered tissue and a transparent front (18, 19) to enable clear vision during use. The cover includes heating means (17) and means (22) for saturating the air enclosed against the face with water vapor, preventing evaporation from the eye and eye lids and enhancing heat transfer to the covered tissue. The transparent front is constructed to prevent condensation and maintain clear vision at all times during use.