Ƙirƙirar wani nau'i mai rikitarwa na wannan jumla kuma an san shi da ciwon kwakwalwa, wanda aka halicce shi ta hanyar katsewar jini zuwa wasu yankunan kwakwalwa.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Har ila yau, an san shi da ciwon kwakwalwa, wanda ya haifar da katsewar samar da jini ga wasu yankunan kwakwalwa, wannan katsewa zai iya faruwa ne sakamakon sakamakon rufewa ko zubar da jini. "