Boston Scientific Corp. has acquired thermal monitoring system maker, Securus Medical Group Inc., for $40 million in cash and up to $10 million in regulatory and commercial milestones. Boston Scientific has invested in the private firm since 2016; the current price tag represents the remaining stake not owned by the company. Securus has developed an FDA-cleared infrared esophageal temperature monitor, which will become part of Boston Scientific's electrophysiology portfolio.