Concept: Respiratory arrest resuscitation -> Done to restore respiration of a patient -> Stabilize their breath. Code of ethics -> Nurses follow these principles while delivering care to the patients. Justice, beneficence, non maleficence, fidelity and autonomy are some of the ethical principles of nursing. Explanation: Non maleficence -> No harm is afflicted to the patient . This principle is involved in this situation. The nurse did not open the valve -> Negligence or purposeful act -> Caused harm to the patient. The oxygen therapy did not benefit the patient due to the nurse's acts. Additional Information Battery -> Acts of physically harming someone. Fidelity -> Be dutiful and fair towards her responsibilities. Beneficence -> Taking care for the wellbeing of the patient -> Being more cooperative with them.