Any instrument connects to music, and music is a symbol of passionate expression and heightened creativity. Musical instruments are the tools of such passion.
If they appear in a dream, they are calling you to step up your creative exploits and increase your level of passion.
[1]Vision: Looking at medical instruments is a warning about the possible danger of an accident or a sudden illness.
See Also: Music.
[2]Implicating a need for one; research instrument and whether literal or figurative
[3]