12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
Scientists have no way of knowing if long-distance swims are a new feature of polar bear life. âWe did not have the GPS technology on collars to document this type of swimming behavior in polar bears in prior decades,â explains Karen Oakley, of the USGS Alaska Science Center .