Final answer:
The ethical principle involved when a nurse overlooks signs of complication with a patient's IV is the principle of nonmaleficence, which mandates healthcare providers to prevent and not cause harm.
Step-by-step explanation:
The ethical principle that is involved when a nurse fails to notice that a patient's IV site is swollen, red, painful, and warm to touch, and that the IV has quit infusing properly, is the principle of nonmaleficence. This principle dictates that healthcare providers should not cause harm to patients and should take action to prevent harm when possible. The nurse's oversight in this situation could lead to further complications for the patient, indicating a breach of this ethical principle. Healthcare professionals must continuously monitor and assess patients to ensure their safety and provide the highest standard of care, thereby upholding the principle of nonmaleficence. Informed consent is another vital ethical concern that relates to patient autonomy and ensuring they are fully aware of the risks associated with their treatments. Accuracy in record-keeping and the observance of patient rights and dignity are also crucial aspects of ethical healthcare practice, and professionals are required to keep themselves informed and accountable.