A keken hannu kujera ce mai taya, ana amfani da ita lokacin tafiya yana da wahala ko ba zai yiwu ba saboda rashin lafiya, rauni, matsalolin da suka shafi tsufa ko nakasa.Wadannan na iya haɗawa da raunin kashin baya (paraplegia, hemiplegia, da quadriplegia), palsy cerebral, raunin kwakwalwa, osteogenesis imperfecta, cututtukan neurone, mahara sclerosis, dystrophy na muscular, spina bifida, da dai sauransu. keken hannu na hannu, kujerar guragu na lantarki, kujerar guragu mai nau'in tsani.