any serious adverse event that has a causal relationship with the investigational device, the comparator or the investigation procedure or where such causal relationship is reasonably possible;
tarlú díobhálach tromchúiseach ar bith a bhfuil gaolmhaireacht chúise aige leis an bhfeiste imscrúdaitheach, leis an gcomparadóir nó leis an nós imeachta imscrúdaithe nó i gcás ina bhféadfadh gaolmhaireacht chúise den sórt sin a bheith ann go réasúnach;