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Interdisciplinary sub-specialties of medicine : ウィキペディア英語版
Medicine

Medicine (British English ; American English ) is the science and practice of the diagnosis, treatment, and prevention of disease. The word ''medicine'' is derived from Latin ''medicus'', meaning "a physician".〔Etymology: (ラテン語:medicina), from ''ars medicina'' "the medical art", from ''medicus'' "physician". ((Etym.Online )) Cf. ''mederi'' "to heal", etym. "know the best course for," from PIE base
*med- "to measure, limit. Cf. Greek ''medos'' "counsel, plan", Avestan ''vi-mad'' "physician"〕〔("Medicine" ) ''Online Etymology Dictionary''〕 Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness.
Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technology to diagnose, treat, and prevent injury and disease, typically through pharmaceuticals or surgery, but also through therapies as diverse as psychotherapy, external splints and traction, medical devices, biologics, and ionizing radiation, amongst others.〔(【引用サイトリンク】 title=Dictionary, medicine )
Medicine has existed for thousands of years, during most of which it was an art (an area of skill and knowledge) frequently having connections to the religious and philosophical beliefs of local culture. For example, a medicine man would apply herbs and say prayers for healing, or an ancient philosopher and physician would apply bloodletting according to the theories of humorism. In recent centuries, since the advent of science, most medicine has become a combination of art and science (both basic and applied, under the umbrella of medical science). While stitching technique for sutures is an art learned through practice, the knowledge of what happens at the cellular and molecular level in the tissues being stitched arises through science.
Prescientific forms of medicine are now known as traditional medicine and folk medicine. They remain commonly used with or instead of scientific medicine and are thus called alternative medicine. For example, evidence on the effectiveness of acupuncture is "variable and inconsistent" for any condition, but is generally safe when done by an appropriately trained practitioner.〔(【引用サイトリンク】url=http://www.cancer.gov/cancertopics/pdq/cam/acupuncture/healthprofessional/page6 )〕 In contrast, treatments outside the bounds of safety and efficacy are termed quackery.
==Clinical practice==

Medical availability and clinical practice varies across the world due to regional differences in culture and technology. Modern scientific medicine is highly developed in the Western world, while in developing countries such as parts of Africa or Asia, the population may rely more heavily on traditional medicine with limited evidence and efficacy and no required formal training for practitioners. Even in the developed world however, evidence-based medicine is not universally used in clinical practice; for example, a 2007 survey of literature reviews found that about 49% of the interventions lacked sufficient evidence to support either benefit or harm.
In modern clinical practice, doctors personally assess patients in order to diagnose, treat, and prevent disease using clinical judgment. The doctor-patient relationship typically begins an interaction with an examination of the patient's medical history and medical record, followed by a medical interview and a physical examination. Basic diagnostic medical devices (e.g. stethoscope, tongue depressor) are typically used. After examination for signs and interviewing for symptoms, the doctor may order medical tests (e.g. blood tests), take a biopsy, or prescribe pharmaceutical drugs or other therapies. Differential diagnosis methods help to rule out conditions based on the information provided. During the encounter, properly informing the patient of all relevant facts is an important part of the relationship and the development of trust. The medical encounter is then documented in the medical record, which is a legal document in many jurisdictions.〔
〕 Follow-ups may be shorter but follow the same general procedure, and specialists follow a similar process. The diagnosis and treatment may take only a few minutes or a few weeks depending upon the complexity of the issue.
The components of the medical interview〔 and encounter are:
*Chief complaint (CC): the reason for the current medical visit. These are the 'symptoms.' They are in the patient's own words and are recorded along with the duration of each one. Also called 'presenting complaint'.
*History of present illness/complaint (HPI): the chronological order of events of symptoms and further clarification of each symptom.
*Current activity: occupation, hobbies, what the patient actually does.
*Medications (Rx): what drugs the patient takes including prescribed, over-the-counter, and home remedies, as well as alternative and herbal medicines/herbal remedies. Allergies are also recorded.
*Past medical history (PMH/PMHx): concurrent medical problems, past hospitalizations and operations, injuries, past infectious diseases and/or vaccinations, history of known allergies.
*Social history (SH): birthplace, residences, marital history, social and economic status, habits (including diet, medications, tobacco, alcohol).
*Family history (FH): listing of diseases in the family that may impact the patient. A family tree is sometimes used.
*Review of systems (ROS) or ''systems inquiry'': a set of additional questions to ask, which may be missed on HPI: a general enquiry (have you noticed any weight loss, change in sleep quality, fevers, lumps and bumps? etc.), followed by questions on the body's main organ systems (heart, lungs, digestive tract, urinary tract, etc.).
The physical examination is the examination of the patient for medical signs of disease, which are objective and observable, in contrast to symptoms which are volunteered by the patient and not necessarily objectively observable.〔(What Are Symptoms? What Are Signs? ). Medical News Today.〕 The healthcare provider uses the senses of sight, hearing, touch, and sometimes smell (e.g., in infection, uremia, diabetic ketoacidosis). Four actions are the basis of physical examination: inspection, palpation (feel), percussion (tap to determine resonance characteristics), and auscultation (listen), generally in that order although auscultation occurs prior to percussion and palpation for abdominal assessments.
The clinical examination involves the study of:
*Vital signs including height, weight, body temperature, blood pressure, pulse, respiration rate, and hemoglobin oxygen saturation
*General appearance of the patient and specific indicators of disease (nutritional status, presence of jaundice, pallor or clubbing)
*Skin
*Head, eye, ear, nose, and throat (HEENT)
*Cardiovascular (heart and blood vessels)
*Respiratory (large airways and lungs)
*Abdomen and rectum
*Genitalia (and pregnancy if the patient is or could be pregnant)
*Musculoskeletal (including spine and extremities)
*Neurological (consciousness, awareness, brain, vision, cranial nerves, spinal cord and peripheral nerves)
*Psychiatric (orientation, mental state, evidence of abnormal perception or thought).
It is to likely focus on areas of interest highlighted in the medical history and may not include everything listed above.
The treatment plan may include ordering additional medical laboratory tests and medical imaging studies, starting therapy, referral to a specialist, or watchful observation. Follow-up may be advised. Depending upon the health insurance plan and the managed care system, various forms of "utilization review", such as prior authorization of tests, may place barriers on accessing expensive services.
The medical decision-making (MDM) process involves analysis and synthesis of all the above data to come up with a list of possible diagnoses (the differential diagnoses), along with an idea of what needs to be done to obtain a definitive diagnosis that would explain the patient's problem.
On subsequent visits, the process may be repeated in an abbreviated manner to obtain any new history, symptoms, physical findings, and lab or imaging results or specialist consultations.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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