Final answer:
The ethical principle associated with loyalty and promise-keeping in the healthcare relationship is fidelity, which emphasizes maintaining trust and being true to commitments with patients.
Step-by-step explanation:
The ethical principle in healthcare associated with being faithful, loyal, and keeping promises in the healthcare provider-patient relationship is fidelity. Fidelity involves duties that require healthcare professionals to be true to the commitments they have made to their patients. These include maintaining confidentiality, delivering on the promises concerning treatments and interventions, and consistently acting in the patient's best interest. In contrast to fidelity, other ethical principles include beneficence, meaning actions should benefit others; non-maleficence, meaning one should not cause harm; and respect for autonomy, which involves honoring patients' rights to make informed decisions about their own care. While all these principles are crucial in ethical decision-making in healthcare, fidelity specifically pertains to maintaining trust in the provider-patient relationship through promise-keeping and loyalty.