I-choanal atresia ingakrokrelwa xa kungenakufakelwa ithyubhu yempumloebizwa ngokuba yi-catheter yempumlo. Kwakhona, ukuba kubonakala ukunkcenkceza kwemifinya okuvela kwenye okanye kuzo zombini iimpumlo, oko kungaluphawu lwe- atresia. Olunye uphawu oluxhaphakileyo kukuvaleka kweempulo okubizwa ngokuba yi-cyanosis ebakwimveku xa incanciswa ngunina, njengoko xa ikule meko ukuphefumla kwayo kuxhomekeke kwiimpumlo. Olu phawu lungqinwa nge-radiological imaging, edla ngokwenziwa nge-CT scan.