Manipulation Under Anaesthetic Harry Brownlow talks through important information to consider if you are having a Manipulation Under Anaesthetic (MUA) of the shoulder. But remember that the video will only discuss the risks and complications in general terms. It will not cover all possibilities and inevitably can not be specific to your particular circumstances. After having watched the video be sure to discuss any concerns and your specific issues with your surgeon prior to surgery. ? Read more about MUA of the Shoulder here.