?:definition
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Hollow cylindrical devices designed with a diameter, length, and other physical and/or chemical characteristics appropriate for a particular use. Tubes may be rigid, semi-rigid, or flexible; they are typically made of metals, metal alloys, rubber, plastics, or glass. Dedicated tubes are available for direct use in clinical procedures (e.g., gastrointestinal decompression, enteral feeding, and tracheostomy); as components of or attachments for medical devices; for use in the clinical laboratory; and also for a diversity of applications in the healthcare environment. Tubes are frequently a component of tubing sets (e.g., hemodialysis tubing sets).
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