US-based medical software developer ArborMetrix has raised $7m in series B backing for software that helps to reduce hospital operation complications.

RPM Ventures led the series B, with participation from existing backer Arboretum Ventures. The Wolverine Venture Fund, a student-led $5.5m venture fund from the University of Michigan, also joined the round.

The round brings the total venture backing in the Ann Arbor-based software developer to $8.5m. Shortly after ArborMetrix was founded in 2011, Arboretum participated in a $1.5m series…