Iatrogenia, es un daño en la salud, causado o provocado por un acto médico. Se deriva de la palabra iatrogénesis que tiene por significado literal ‘provocado por el médico o sanador’ (iatros significa ‘médico’ en griego, y génesis: ‘crear’). Puede ser producido por una droga, procedimiento médico o quirúrgico, realizado por algún profesional vinculado a las ciencias de la salud, ya sea médico, terapeuta, psicólogo , farmacéutico, enfermera, dentista, etc. También puede ser causado por un médico que practique terapias alternativas. Puede ocurrir debido a un error o elección incorrecta del tratamiento, por negligencia, inexperiencia, imprudencia o abandono del paciente. Sin embargo, también puede resultar de procedimientos médicos realizado dentro una indicación correcta, realizados con pericia, prudencia y diligencia. Algunos ejemplos son la flebitis postcatéter, la infección urinaria leve después de mantener por varios días una sonda vesical, la flebitis de las piernas después de la extirpación de un apéndice gangrenado, etc.[cita requerida] Desde un punto de vista sociológico hay tres tipos de iatrogenia: clínica, social y cultural.

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Iatrogenesis (from the Greek for "brought forth by the healer") refers to any effect on a person, resulting from any activity of one or more persons acting as healthcare professionals or promoting products or services as beneficial to health, that does not support a goal of the person affected. Some iatrogenic effects are clearly defined and easily recognized, such as a complication following a surgical procedure (e.g., lymphedema as a result of breast cancer surgery). Less obvious ones, such as complex drug interactions, may require significant investigation to identify. While somehave advocated using 'iatrogenesis' to refer to all 'events caused by the health care delivery team', whether 'positive or negative', consensus limits use of 'iatrogenesis' to adverse, or, most broadly, to unintended outcomes. Causes of iatrogenesis include: \n* side effects of possible drug interactions \n* complications arising from a procedure or treatment \n* medical error \n* negligence \n* unexamined instrument design \n* anxiety or annoyance in the physician or treatment provider in relation to medical procedures or treatments \n* unnecessary treatment for profit Unlike an adverse event, an iatrogenic effect is not always harmful. For example, a scar created by surgery is said to be iatrogenic even though it does not represent improper care and may not be troublesome. Professionals who may cause harm to patients include physicians, pharmacists, nurses, dentists, psychologists, psychiatrists, medical laboratory scientists and therapists. Iatrogenesis can also result from complementary and alternative medicine treatments. Globally as of 2013 an estimated 20 million negative effects from treatment occurred. It is estimated that 142,000 people died in 2013 from adverse effects of medical treatment up from 94,000 in 1990.

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