New Tube or Catheter?
If you are getting a new tube or catheter placed, ask the surgeon or radiologist to give you the product papers/packaging that come with it. These papers should tell you the exact name of the product, the manufacturer and specifications (like size, material composition, etc.) that may come in handy down the road if you have a problem with the device. Keep the papers with your other medical files for easy future reference.
Similarly, it is a good idea to keep a label from your formula can or cleaned EN/TPN bag, and bring it with you to office visits and hospital admissions. The label has the most up to date information on the composition of your formula/solution. This information may not be readily available otherwise, and is needed by your physician to make adjustments that could be critical to your well being.