Ethics, Human Subject Protection, and Informed Consent
Human subject protection rests on the ethical principles of respect for persons, beneficence, and justice, operationalized through informed consent, IRB/IEC review, and risk minimization. Candidates must understand the informed consent process - not just the document - including voluntariness, comprehension, disclosure, capacity, and assent for minors or decisionally impaired subjects.
Core concepts include elements of informed consent (purpose, procedures, risks, benefits, alternatives, confidentiality, compensation, contact information, voluntariness, withdrawal rights), re-consent when new information arises, vulnerable populations, therapeutic misconception, privacy and confidentiality protections, and IRB continuing review. Know that consent must be obtained before any study-specific procedure, and that the subject (or legally authorized representative) must sign and date the current approved version.
Traps: treating consent as a one-time signature rather than an ongoing process; assuming a signed form guarantees valid consent when comprehension or voluntariness was compromised; and forgetting re-consent when the protocol or risk information changes materially. Another frequent trap is the emergency exception - it is narrow and must be followed by prompt consent and IRB notification.
Rule of thumb: valid consent requires three things - capacity, information, and voluntariness - and any one failing invalidates the consent regardless of a signature.
Worked example: A subject signs the consent form but later says she felt she could not refuse because her doctor asked her. This raises a voluntariness concern (undue influence) even though the form is signed, and must be addressed.