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.
The remaining ice is increasingly far offshore, floating over deep, unproductive waters. 1  In one study, a collared female polar bear embarked on a marathon, 426-mile swim over nine days without finding a resting place. 2  Somewhere along the way, she lost her cub and 22% of her body weight.