Primary prevention refers to the protection of health by personal and community wide effects, such as preserving good nutritional status, physical fitness, and emotional well-being, immunizing against infectious diseases, and making the environment safe. Secondary prevention can be defined as the measures available to individuals and populations for the early detection and prompt and effective intervention to correct departures from good health. Tertiary prevention consists of the measures available to reduce or eliminate long-term impairments and disabilities, minimize suffering caused by existing departures from good health, and to promote the patient's adjustment to irremediable conditions. This extends the concept of prevention into the field of rehabilitation. There are no precise boundaries between these levels.
Preventive Medicine A specialized field of medical practice composed of distinct disciplines that focus on the health of defined populations in order to promote and maintain health and well-being and prevent disease, disability and premature death. It aims at the application of preventive measures within all areas of clinical medicine. In addition to the knowledge of basic and clinical sciences and the skills common to all physicians, practitioners of preventive medicine possess knowledge of and competence in other disciplines. Among a broad scope of such disciplines are: bio-statistics, epidemiology, planning, organization, management, financing, and evaluation of health programs, environmental health, application of social and behavioral factors in health and disease, health promotion, health education and nutrition. Primary Health Care The World Health Organization defines primary health care as the principal vehicle for the delivery of health care at the most local level of a country's health system. It is essential health care made accessible at a cost the country and community can afford with methods that are practical, scientifically sound and socially acceptable. Everyone in the community should have access to it, and everyone should be involved in it. Beside an appropriate treatment of common diseases and injuries, provision of essential drugs, maternal and child health, and prevention and control locally endemic diseases and immunization, it should also include at least education of the community on prevalent health problems and methods of preventing them, promotion of proper nutrition, safe water and sanitation. Primary Medical Care Primary medical care begins when a patient with a new health problem encounters the first-level provider of care. The provider initiates care, may screen for referral to a specialist, and secures overall responsibility for continuity of care provided by all medical personnel in both outpatient and in-patient settings. Problem-Based Learning (PBL) In this approach, students learn in small groups supported by a tutor. They initially explore a predetermined problem. The problem contains triggers designed to evoke objectives or concepts which are used to set the agenda for individual or group investigation and learning after the initial session. Subsequent group meetings permit students to monitor their achievements and to set further learning goals as required. The tutor's role is to offer support for learning and to help reach the expected outcomes. PBL enables students to develop the ability to translate knowledge into practice at an early stage, encourages individual participation in learning and also allows the development of teamwork skills. Students in PBL courses have been found to place more emphasis on "meaning" (understanding) than "reproduction" (memorization). Students must engage in a significant amount of self-directed learning; lectures are kept to a minimum. PBL originated at McMaster University in Canada, and then at Maastricht University, and is now widely adopted in medical schools in many countries. Each school makes its own adjustments to the basic model. It does require a heavy investment in resources (library books, IT, tutorial rooms) as well as requiring education and training for tutors. Professionalism Adherence to a set of values comprising both a formally agreed-upon code of conduct and the informal expectations of colleagues, clients and society. The key values include acting in a patient's interest, responsiveness to the health needs of society, maintaining the highest standards of excellence in the practice of medicine and in the generation and dissemination of knowledge. In addition to medical knowledge and skills, medical professionals should present psychosocial and humanistic qualities such as caring, empathy, humility and compassion, as well as social responsibility and sensitivity to people's culture and beliefs. All these qualities are expected of members of highly trained professions. The American Board of Internal Medicine's Project Professionalism indicates the most important elements of professionalism to be: altruism, accountability, duty, excellence, honor and integrity, and respect for others.
Professional Altruism: constitutes the essence of professionalism and is based on the rule that the best interest of patients and not self-interest is the professional obligation. Professional Accountability is an important element of professionalism which is required of physicians at several levels: to their patients for fulfilling the implied contract governing the patient/physician relationship, to society for addressing the health needs of the public, and to their profession for adhering to medicine's time-honored ethical precepts. Professional Duty can be expressed by the free acceptance of a commitment to service, availability and responsiveness when "on call," accepting inconvenience to meet the needs of ones patients, enduring unavoidable risks to oneself when a patient's welfare is at stake, and 0advocating the best possible care regardless of the patient's ability to pay. It is willingness to seek an active role in professional organizations and volunteering ones skills and expertise for the welfare of the community. Professional Excellence entails a conscientious effort to exceed ordinary expectations. Commitment to excellence is an acknowledged goal for all physicians and includes a commitment to life-long learning. Professional Honor and Integrity implies being fair, being truthful, keeping one's word, meeting commitments, and being straightforward. It also requires recognition of the possibility of conflict of interest and avoiding any situation in which the interest of the physician is placed above that of the patient or allowing personal gain to supersede the best interest of the patient. It constitutes an integral part of professionalism. The importance of professionalism in the patient/physician relationship cannot be overstated. Professional Respect for Others is reflected in the respect towards the patients and their families, other physicians and professional colleagues such as nurses, medical students, and residents. It is the essence of humanism, and humanism is both central to professionalism and fundamental to enhancing collegiality among physicians.
Public Health Organized efforts of society to protect, promote, and restore people's health. It is the combination of science, skills, and beliefs that is directed to the maintenance and improvement of the health of all the people through collective or social actions. The programs, services and institutions involved emphasize the prevention of disease and the health needs of the population as a whole. Public health activities change with variations in technology and social values but the goals remain the same: to reduce the amount of disease, premature death, and disease-produced discomfort and disability in the population. Public health is thus a social institution, a discipline, and a practice.
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