NeuroBlate Probe by Monteris Medical: Letter to Health Care Providers, Class I Recall - Unintended Heating. A Class I recall is the most serious type of recall and is issued when use of the device may cause serious injuries or death. Monteris issued three product advisories between October and December 2017, which were part of the Class I recall; however, the FDA has concerns that the information provided by Monteris has not sufficiently mitigated the risk of unintended probe tip heating. We are working with the manufacturer to address these concerns. Source 2f.