Critical care nurses are registered nurses that treat patients with serious, acute illnesses and injuries that require careful monitoring and extensive treatment and medication. Sample job titles for critical care nurses include critical care registered nurse, intensive care unit nurse and burn center nurse. Critical care nursing certification is voluntary, though certification should improve job opportunities and salary, and some employers may require certification. Possible critical care nurse certifications include Adult, Neonatal and Pediatric Acute/Critical Care Nursing Certification (CCRN) and Progressive Care Nursing Certification (PCCN). The U.S. Bureau of Labor Statistics predicts excellent, overall job growth for registered nurses.