When the doctor is also the investigator
- Topic
A doctor doing research with their own patients serves two ends, the patient's good and knowledge, and must make sure the second does not override the first.
What it is
In clinical practice the doctor seeks the greatest good of a particular patient; in research they seek generalisable knowledge, and the protocol, not the patient, sets what is done. When the same person holds both roles, risks appear: the patient may feel obliged to take part so as not to let their doctor down, may believe that everything done in the study is treatment tailored to them (the so-called therapeutic misconception), and the doctor may have incentives to recruit. The Declaration of Helsinki (2024 revision) allows research to be combined with care only if it is justified by its preventive, diagnostic or therapeutic value and does not harm the patient's health, and asks that consent be obtained by an independent person when there is a dependent relationship.
Key facts
- The physician must state clearly which parts of care relate to the study (Helsinki 2024).
- Randomisation, placebo, blinding and the protocol's additional tests are not chosen in the individual patient's interest; this has to be explained.
- Payments per recruited patient are a conflict of interest declared to the committee and the participant (Helsinki 2024: funding sources and conflicts in consent).
- The research ethics committee reviews the protocol before it starts and may monitor, change or suspend it.
- Resolution 8430, art. 45: subordinate groups include students, hospital and laboratory workers, members of the armed forces and prisoners, because their consent may be influenced by an authority.
- Resolution 8430, art. 46: in those groups, the committee includes one or more members of the population studied and makes sure that refusing or withdrawing does not affect their situation.
In clinical practice
- An oncologist invites their patient to a trial: it is better for another team member, not involved in the treatment, to explain the study and ask for the signature.
- A useful sentence: «If you decide not to take part, I will keep caring for you just the same».
- If the patient says «I accept because the study is the best thing for me», the misconception must be corrected: the study seeks to find out which treatment is better.
- If during the study the doctor believes the patient would be better off outside the protocol, the patient's interest prevails.
- A lecturer recruiting their students: a subordinate group; no one in the course should know who agreed or refused.
Legal framework in Colombia
- Resolution 8430 of 1993, art. 15: consent explains the aims, procedures (identifying the experimental ones), risks, benefits, alternatives, freedom to withdraw, confidentiality, and treatment and compensation for harm.
- Resolution 8430, arts. 45 and 46: protection of subordinate groups.
- Law 23 of 1981, art. 54: in biomedical research the doctor follows the country's rules and the recommendations of the World Medical Association.
- Official texts checked on 2026-11-13 at minsalud.gov.co (Resolution 8430 of 1993) and funcionpublica.gov.co (Law 23 of 1981).
Test yourself
Think of the answer, then tap the question to see it.
When does the Declaration of Helsinki allow a physician to include their own patients in research?
When it is justified by its preventive, diagnostic or therapeutic value and the physician has good reason to believe taking part will not harm those patients' health.
Who should seek consent if the potential participant depends on the physician-investigator?
A qualified person independent of that relationship, according to the Declaration of Helsinki (2024).
What is the therapeutic misconception?
Believing that everything done in a study is designed for the participant's personal benefit, when the protocol seeks generalisable knowledge.
Which groups does Resolution 8430 of 1993 consider subordinate?
Students, laboratory and hospital workers, employees and members of the armed forces, inmates of detention centres and other groups whose consent may be influenced by an authority (art. 45).
Connections
Educational content on ethics and health law; not legal advice. Laws and case law change: each page links the official text and says when it was last checked. For a real case, read the text in force and ask a lawyer or the medical ethics tribunal.
Sources: WMA Declaration of Helsinki – Ethical Principles for Medical Research Involving Human Participants (World Medical Association, 2024); Resolución 8430 de 1993: normas científicas, técnicas y administrativas para la investigación en salud (Ministerio de Salud y Protección Social, 1993); Ley 23 de 1981, por la cual se dictan normas en materia de ética médica (Función Pública, Gestor Normativo, 1981); International Ethical Guidelines for Health-related Research Involving Humans (Council for International Organizations of Medical Sciences (CIOMS) and World Health Organization, 2016).
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