Thank you. I don't think that the combination can be claimed as a concept, it's not that original.
Could you please try the following on #30 (that I like very much, it is very elegant):
a) increase the reflection, as in #19;
b) add the waves as in #19;
c) add a little separation between the headset of the stethoscope and its reflection, so that it is even more clear that it is a stethoscope (as it doesn't touch the same floor as the logo); otherwise it could seem the plug of the mouse, and not a combination of stethoscope and mouse.
Moreover, if you feel that other colors could be better, please make a proposal.
Thank you very much