When sourcing medical mannequins, you must prioritize anatomical accuracy and functional realism. For basic nursing, ensure the mannequin has movable joints that mimic human range of motion. For advanced ACLS (Advanced Cardiac Life Support) training, look for integrated sensors that provide real-time feedback on compression depth, ventilation volume, and hand placement. High-fidelity models should feature electronic monitoring systems and be compatible with standard medical equipment like defibrillators and ventilators.