Abstract: Snares for retrieval of medical devices from the body of an animal, medical assemblies, kits, and methods of retrieving a medical device from the body of an animal are described. An example snare comprises an outer sheath defining an outer sheath lumen; an elongate member disposed in the outer sheath lumen and having a longitudinal axis and at least one elongate member lumen; a capture member disposed and axially movable within the at least one elongate member lumen, the capture member defining a capture loop having a throat region and a portion extending along a plane that is perpendicular to the longitudinal axis of the elongate member; and a threader member disposed and axially movable within the at least one elongate member lumen, the threader member defining a threader loop. A handle includes a rotatable control member for deflecting a distal end of the outer sheath.

Abstract: Provided is an apparatus for measuring the ammonia concentration in exhaled breath and a method for measuring the ammonia concentration in exhaled breath. The apparatus comprises a sample collection portion, capable of capturing exhaled breath to control the volume of exhaled breath, a pressure gauge for the control of the flow rate of exhaled breath, a small diameter inner tube oriented in a perpendicular direction to the colorimetric sensor to focus the exhaled breath stream onto the central region of the sensor, and an analysis portion capable of receiving said exhaled breath from said sample collection portion. The analysis portion comprises a colorimetric sensor comprising an active component on a substrate. The colorimetric sensor changes color proportional to the ammonia concentration in said exhaled breath.