A catheter stands for a function handed over to outside help. Tradition reads it as a feeling of not being fully in charge of yourself for a time, and of accepting support until that returns.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.