An incisional tunneler nerve block catheter assembly (10) which includes a catheter (16) and a tunneler, guidewire, or needle (18) contained within the lumen of the catheter. The catheter and the tunneler, guidewire, or needle are configured such that the catheter and the tunneler, guidewire, or needle are inserted simultaneously and are then positioned to a target area. The tunneler, guidewire, or needle are releasably contained within the lumen of the catheter such that a tunneler, guidewire, or needle can be withdrawn from the lumen after insertion or placement such that a drug or anesthesia can be administered through at least one aperture (28).
