Source:http://linkedlifedata.com/resource/umls/id/C0184176
UMD: Synthetic polymer tubing made of polyvinyl chloride (PVC). This tubing is typically a hollow, rigid or semirigid, opaque cylinder designed for the transfer of fluids, either liquids or gases. PVC tubing is usually available in standardized lengths and in a variety of diameters and wall thicknesses (i.e., gauges) that that permit the use of segments of different sizes appropriate for a given application (e.g., drain tubes, laboratory equipment tubes, electrical conduits) in the healthcare facility.