Figure 3.
Motorized actuation of the tool for retracting the guide tube back and exposing the prebent microneedle. The inner tube of the tool shaft delivers the injection fluid, while 3 FBG sensors on the outer tube sense transverse forces on the microneedle. (a) The inner tube of the tool shaft delivers the injection fluid, while (b) 3 FBG sensors on the outer tube sense transverse forces on the microneedle.