Abstract: A continuous tube includes an inner layer comprising a polyethylene composition and an outer layer comprising a thermal plastic elastomer. The inner layer and the outer layer are concentrically disposed without having an intermediate layer therebetween.

Abstract: Medical tube can have a continuous inner layer having a continuous outer layer thereon, in which the inner layer includes a polyolefin such as a polyethylene or polypropylene or a functionalized polyolefin. The outer layer can include a thermoplastic polymer such as one or more of, or a blend including, a thermoplastic polyurethane (TPU), a thermoplastic olefin (TPO), a thermoplastic elastomer (TPE), a styrene-containing thermoplastic elastomer (S-TPE), a polyolefin elastomer (POE), a styrenic blocking copolymer (SBC). Advantageously, the outer layer and/or the inner layer do not include polyvinyl chloride. Such tubing can be readily solvent bonded to medical connectors and used with infusion sets.

Abstract: Sensing airflow and delivering therapeutic gas to a patient. At least one example embodiment is a method including: sensing, by a delivery device, that multiple breathing orifices are open to flow; and during a plurality of subsequent inhalations in which multiple breathing orifices are open to flow; and delivering, by the delivery device, a bolus of therapeutic gas to only one breathing orifice during each inhalation, and alternating delivery location in subsequent inhalations. The example delivering may further comprise: supplying therapeutic gas only from an accumulator during a first portion each inhalation; dispensing therapeutic gas from the accumulator and from a pressure regulator during a second portion of each inhalation, the second portion immediately subsequent to the first portion.

Abstract: Medical tube can have a continuous inner layer having a continuous outer layer thereon, in which the inner layer includes a polyolefin such as a polyethylene or polypropylene or a functionalized polyolefin. The outer layer can include a thermoplastic polymer such as one or more of, or a blend including, a thermoplastic polyurethane (TPU), a thermoplastic olefin (TPO), a thermoplastic elastomer (TPE), a styrene-containing thermoplastic elastomer (S-TPE), a polyolefin elastomer (POE), a styrenic blocking copolymer (SBC). Advantageously, the outer layer and/or the inner layer do not include polyvinyl chloride. Such tubing can be used as medical device such as with infusion sets.

Abstract: A mask such as a laryngeal mask or face mask, has a soft annular cuff on a more rigid mount of funnel shape. The cuff and mount are moulded together by rotational moulding or the mount is preformed and the cuff is moulded onto the mount in a rotational mould.