What is a CNA? The title varies by state, but CNA commonly stands for Certified Nursing Assistant or Certified Nurse Aide. Some states use STNA (State Tested Nursing Assistant) instead of CNA, but they are the same job. CNAs work under the direct supervision of LPNs (Licensed Practical Nurses) or RNs (Registered Nurses) and assist patients or residents with daily living and healthcare activities. What responsibilities does a CNA have? CNAs work with patients or residents, usually in long-term care facilities such as nursing homes, helping with daily tasks such as grooming and personal hygiene, bedmaking, measuring vital signs, [...]