The studies on the efficacy of Paravertebral blocks are mixed. A few show very good pain relief for Thorascopic Surgery Patients while others show the benefit is 6-8 hours postoperatively.
There are centers using this block for Mastectomy as well. Personally, the data is not convincing enough to justify the technique. That said, I have performed the technique for Mastectomy and Thoracoscopy. Still, I question the real added value of this block.
Now, a Catheter at one or two levels may change my opinion. Again, not enough published data to make a good claim either way.
Blade