Boston Scientific-backed pain relief implant developer Neuros has now raised about $70m in total and is targeting $42.8m in its latest round.

Neuros Medical, a US-based pain treatment system developer backed by medical device producer Boston Scientific, has $37m from undisclosed investors, according to a regulatory filing.

Founded in 2008, Neuros is working on a clinical-stage implant dubbed Electrical Nerve Block that exploits electric impulses to inhibit damaged nerve centres responsible for chronic pain.

The technology involves hooking an electrode around the nerve’s peripheral to conduct electricity from a pacemaker-sized generator, treating indications such as post-surgical pain and migraines. The company…