If a medical device suddenly becomes unavailable after Brexit, can the Dutch government intervene?

Until 31 December 2020 a transition period is in place. During this period, all EU agreements and rules will still apply to the UK. In this period Brexit can not cause a shortage of medical devices. As long as manufacturers make these devices available on the European market. After 31 December 2020 the situation may change, depending on what the UK and the EU agree.