This case study, centered on the Mr. Martinez case, presents an ethical dilemma in healthcare concerning end-of-life decisions. The patient, suffering from respiratory failure and COPD, faces conflicting ethical principles: beneficence (providing life-saving treatment like CPR and ventilator support) versus autonomy (respecting the patient's or family's wishes to withhold such treatment). The paper explores key ethical issues, including the conflict between autonomy and beneficence, and the importance of informed decision-making. It also addresses end-of-life issues, such as passive euthanasia, and how ethical models and best practices guide healthcare practitioners in making legal and ethical decisions. The analysis emphasizes the need for palliative care and adherence to ethical principles and guidelines to ensure the best possible patient outcomes and respect patient and family wishes.