Warning: mkdir(): Permission denied in /home/virtual/lib/view_data.php on line 87 Warning: chmod() expects exactly 2 parameters, 3 given in /home/virtual/lib/view_data.php on line 88 Warning: fopen(/home/virtual/audiology/journal/upload/ip_log/ip_log_2024-05.txt): failed to open stream: No such file or directory in /home/virtual/lib/view_data.php on line 95 Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/virtual/lib/view_data.php on line 96 Institutional Review Boards and Bioethical Issues for Otologists and Audiologists
Korean J Audiol Search


J Audiol Otol > Volume 16(2); 2012 > Article
Park and Lee: Institutional Review Boards and Bioethical Issues for Otologists and Audiologists


Otologists and audiologists care for patients and conduct clinical research to find more effective treatments that benefit patients. Institutional Review Board (IRB) permission is necessary for conducting clinical trials on humans. Furthermore, many bioethical conflicts are encountered while conducting research. However, few otologists and audiologists in Korea know bioethics and the principles and regulations of IRBs in detail. This paper reviews the history of ethics in clinical research and current bioethical principles and IRB regulations. We outline what you need as otologists or audiologists to get IRB approval while considering the principles of bioethics.


Clinical research starts with medical practice. There is evidence that ancient Egyptian, Greek, and Chinese physicians conducted clinical studies, including studies of drugs, surgery, and devices.1) Hundreds of studies related to hearing have been conducted in the USA. In Korea, over 100 studies related to hearing or otology are published annually in national or international journals. Clinical research is not limited to universities or tertiary hospitals. Most otologists and audiologists know that Institutional Review Board (IRB) permission is essential when conducting clinical trials involving humans. Many ethical issues arise in clinical practice and clinical research. As physicians and researchers, we often care for patients and conduct clinical research simultaneously.2) However, conflict between clinical practice and research can arise. For example, a research participant may not gain any benefit from the research, but the research may have great benefit for others. When one finds a potentially good drug or treatment for a disease, one wants to test it. Therefore, one must know bioethics and IRB principles and regulations so as to get IRB approval to conduct clinical research. As with clinical guidelines and well-known treatment protocols, there are rules that must be followed. Additionally, governments may restrict clinical trials by law (Table 1).

History of Clinical Research and Bioethics

Clinical trials started with the beginning of medicine. Perhaps ethical issues were also a part of medicine at that time. The first chapter of Daniel in the Old Testament (Daniel 1: 11-16) contains evidence of a clinical trial, and Hippocrates tried to define ethical issues in medicine. However, ethical issues emerged as a major concern in clinical trials before World War II. As a result of Nazi experiments and other unethical experiments conducted in the 20th century, codes and regulations have been drawn up to protect human subjects (Table 1).3-8) The judgment at Nuremberg with respect to the Nazi experiments identified two essential ethical points: voluntary consent and the rights or welfare of the subject (Table 2).1,3)
The Declaration of Helsinki, originally issued by the World Medical Assembly in 1964, has been revised seven times as of 2011.6,9) The guiding principle is "the health of my patient will be my first consideration". Although the declaration applies primarily to physicians, the World Medical Assembly encouraged those conducting related medical research to follow their principles. They defined several requirements for the scientific and ethical aspects of research to be applied by physicians, authors, and ethics committees.6)

Principles of Bioethics

There are several principles in bioethics. The three basic principles identified in the Belmont report in 1979 were respect for persons, beneficence, and justice. These principles are manifested in informed consent, the assessment of risk and benefits, and the selection of subjects.10)
The seven ethical requirements published in the Journal of the American Medical Association in 2000 are also well-known and well-organized principles (Table 3).11) Fulfillment of all seven requirements is necessary for ethical clinical research.11,12) These requirements are universal, but they must be adapted to the health, economic, cultural, and technological conditions under which clinical research is conducted.
Clinical trials are valuable if the clinical research improves health and well-being or advances knowledge. To be ethical, clinical research must be valuable. All clinical research exploits patients and uses limited resources. So investigators should consider the value of any clinical trial.13)
Scientific validity means that the researcher should use accepted scientific principles and methods, including statistical methods, to produce reliable, valid data.4) In clinical research, a scientific study may be an ethical study; an unscientific study is an unethical study. Subject selection must be fair so that stigmatized or vulnerable subjects are not targeted for risky research. A scientific study requires fair subject selection using scientifically valid selection and exclusion criteria. Through this process, the investigator can manage risks and benefits, such as excluding higher-risk groups.14,15)
Clinical trials can be conducted only if they have a favorable risk-benefit ratio.16) Risk is the probability of harm or injury caused by the clinical trial. Minimal risk is defined as "the probability and magnitude of harm or discomfort anticipated in the research are not greater in and of themselves than those ordinarily encountered in daily life or during the performance of routine physical or psychological examinations or tests" [Code of Federal Regulations (CFR) 45, 46]. Benefit refers to valued or desired outcomes related to health, psychosocial state, or knowledge. Money is not a benefit, but can be considered as compensation.17) The assessment of risk and benefits involves three steps. First, risks are identified and minimized. Risk can be reduced by using a scientific study design and reducing unnecessary exposure to risk.18,19) Second, benefits are increased if the health of the subjects is improved, knowledge about their disease is increased, or a clinical service is provided. Finally, the balance between risks and benefit should be assessed. The cumulative benefit of a clinical trial should outweigh its risk.
Independent review is essential when conducting clinical trials because every investigator has an inherent conflict of interest.20) The independent reviewers should not be affiliated with the research to minimize any conflict of interest.21,22) The independent review includes not only the IRB but also data- and safety-monitoring boards or ethics committees.23) An independent reviewer reviews the design of the research, the proposed subject population, and the risk-benefit ratio of the study. Minimum standards have been defined for IRB membership: the IRB should have at least five members including at least one member with a scientific background, one nonscientific member, and one person who is not affiliated with the institution.5)
The investigator should respect subject autonomy and shou-ld obtain informed consent.24) Informed consent must ensure that individuals control their enrollment in clinical trials and their continuing enrollment. Any informed consent process should include notifying the subject of the purpose of the research as well as its procedures, potential risks, benefits, and alternatives. In the USA, the general requirements for informed consent are regulated by the CFR (Table 4).5)

IRB Review Process

The aim of most IRBs is to protect the rights and welfare of humans participating as subjects in research studies. The IRB approves and monitors clinical trials. Although the IRB review process varies according to region and institution, it includes common steps and rules.13,25) The process starts with the submission of a research proposal. The proposal usually includes the application form, study protocol, case report form, curriculum vitae of the investigators, and statement of conflicts of interest. Additionally, most IRBs require the completion of good clinical practice training, Collaborative Institutional Training Initiative training, or other training to ensure that the investigators are prepared to conduct ethical research.
When the proposal is submitted, the IRB reviews it in terms of its scientific and ethical merit.26) In the USA, CFR 46 suggests that regulatory review is a requirement (Table 5).5) After the review, the protocol is voted on; the vote may be open or closed. Four basic outcomes are possible: approval, conditional approval, revision required, and rejection. After obtaining IRB approval, clinicians can start their studies. Typically, the IRB requires that the approval be renewed annually if the study will continue for several years.


Before commencing clinical research, it is important to know bioethics as well as the IRB rules. As otologists and audiologists, we can reduce the risk to participants and provide more information for informed consent in studies involving hearing-impaired patients. Any well-designed study protocol should meet scientific and ethical guidelines.


The author thanks Dr. Christine Grady and Dr. Marion Danis of NIH for providing the bioethics research data.


1. Gallin JI. A historical perspective on clinical research. In: Gallin JI, Ognibene FP. editors. Principles and practice of clinical research. Burlington: Elsevier;2007. p.1–10.

2. Beecher HK. Ethics and clinical research. N Engl J Med 1966;274:1354–1360. PMID: 5327352.
crossref pmid
3. Nuremberg Military Tribunal. The Nuremberg Code. JAMA 1996;276:1691PMID: 11644854.
crossref pmid
4. Sciences CfIOoM. nternational Ethical Guidelines for Biomedical Research Involving Human Subjects. 2002. cited 2002. Geneva: CIOMS/WHO;Available from: URL: http://www.cimos.ch.

5. Huisman MA, De Heer E, Grote JJ. Survival signaling and terminal differentiation in cholesteatoma epithelium. Acta Otolaryngol 2007;127:424–429. PMID: 17453465.
crossref pmid
6. Chicheportiche Y, Bourdon PR, Xu H, Hsu YM, Scott H, Hession C, et al. TWEAK, a new secreted ligand in the tumor necrosis factor family that weakly induces apoptosis. J Biol Chem 1997;272:32401–32410. PMID: 9405449.
crossref pmid
7. Albino AP, Reed JA, Bogdany JK, Sassoon J, Desloge RB, Parisier SC. Expression of p53 protein in human middle ear cholesteatomas: pathogenetic implications. Am J Otol 1998;19:30–36. PMID: 9455944.
8. Council for International Organizations of Medical Sciences. International ethical guidelines for biomedical research involving human subjects. Bull Med Ethics 2002;17–23.

9. World Medical Association declaration of Helsinki. Recommendations guiding physicians in biomedical research involving human subjects. JAMA 1997;277:925–926. PMID: 9062334.
crossref pmid
10. Grady C. Ethical principles in clinical research. In: Gallin JI, Ognibene FP. editors. Principles and practice of clinical research. 2nd ed. Burlington: Elsevier;2007. p.15–25.

11. Emanuel EJ, Wendler D, Grady C. What makes clinical research ethical? JAMA 2000;283:2701–2711. PMID: 10819955.
crossref pmid
12. Miller FG. Clinical research with healthy volunteers: an ethical framework. J Investig Med 2003;51(Suppl 1):S2–S5.
crossref pmid
13. Danis M, Largent E, Grady C, Wendler D, Hull SC, Shah S, et al. Starting research. New York: Oxford University Press;2012. p.21–48.

14. Miller J, Crigger BJ. Ethical standards for human subject research in developing countries. IRB 1992;14:7–8. PMID: 11656138.
15. Arpaillange P, Dion S, Mathe G. Proposal for ethical standards in therapeutic trials. Br Med J (Clin Res Ed) 1985;291:887–889.
crossref pmid pmc
16. Kaufman JL. Protecting research subjects. N Engl J Med 2002;346:2093–2095. author reply 2093-5. PMID: 12087152.
17. Bernstein M. Payment of research subjects involved in clinical trials is unethical. J Neurooncol 2003;63:223–224. PMID: 12892227.
crossref pmid
18. Danis M, Largent E, Grady C, Wendler D, Hull SC, Shah S, et al. Enrolling research participants. New York: Oxford University Press;2012. p.49–77.

19. Danis M, Largent E, Grady C, Wendler D, Hull SC, Shah S, et al. Protecting research participants. New York: Oxford University Press;2012. p.78–99.

20. Kaiser J. Clinical trials. Proposed rules aim to curb financial conflicts of interest. Science 2002;295:246–247. PMID: 11786611.
crossref pmid
21. American Society of Clinical Oncology. American Society of Clinical Oncology policy statement: oversight of clinical research. J Clin Oncol 2003;21:2377–2386. PMID: 12721281.
crossref pmid
22. Greco D, Diniz NM. Conflicts of interest in research involving human beings. J Int Bioethique 2008;19:143–154. 202–203. PMID: 18664007.
crossref pmid
23. Hossne WS, Vieira S, De Freitas CB. Committees for Ethics in Research involving human subjects. J Int Bioethique 2008;19:131–141. 200PMID: 18664006.
24. Bratt DE. Informed consent in medical research. Doctors are arrogant to think they need to debate issue of patient consent. BMJ 1997;314:1477PMID: 9167569.
25. Wichman A. Institutional review boards. In: Gallin JI, Ognibene FP. editors. Principles and practice of clinical research. Burlington: Elsevier;2007. p.47–57.

26. Weymuller EA Jr. A consideration of ethical issues in the design of clinical trials. Am J Otolaryngol 1996;17:2–11. PMID: 8801810.
crossref pmid
Table 1
Codes and regulations for clinical research
Table 2
Nuremberg codes7)
Table 3
The seven ethical requirements
Table 4
Basic elements of informed consent (CFR 45, 46.116)5)

CFR, US Code of Federal Regulations

Table 5
Regulatory review requirements (45 CFR 46.111)5)

CFR, US Code of Federal Regulations


Browse all articles >


Browse all articles >

Editorial Office
The Catholic University of Korea, Institute of Biomedical Industry, 4017
222, Banpo-daero, Seocho-gu, Seoul, Republic of Korea
Tel: +82-2-3784-8551    Fax: +82-0505-115-8551    E-mail: jao@smileml.com                

Copyright © 2024 by The Korean Audiological Society and Korean Otological Society. All rights reserved.

Developed in M2PI

Close layer
prev next