This is a bit of a long shot, but I am looking into buying an oximeter that will help me establish whether or not ds2, aged 3, actually has sleep apnoea. I've always used an angelcare alarm and feel strongly that he does have apnoeas but the doctors are completely dismissive. At the weekend he was cold and I had to shout and shake him to get him to rouse, despite the monitor blaring. Can any of you recommend an oximeter that works on a 3 year old's finger please? Reviews seem very mixed. Is there one that has an alarm for when he's too big for the angelcare (due to mattress thickness)? Thanks.