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Included here are common abbreviations used in medical records and in this edition.

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÷: divided dose

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↓: decrease(d), reduce, downward

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×: times for multiplication sign

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↑: increase(d), upward (as in titrate upward)

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/: per

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+/–: with or without

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+: with

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<: less than, younger than

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>: more than, older than

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~: approximately

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≈: approximately equal to

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AAA: abdominal aortic aneurysm

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a–a gradient: alveolar-to-arterial gradient

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A/A index: ankle/arm index

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AADC VAN DISSL: mnemonic for Admit/Attending, Diagnosis, Condition, Vitals, Activity, Nursing procedures, Diet, Ins and outs, Specific medications, Symptomatic medications, Labs

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AAS: acute abdominal series

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A&B: apnea and bradycardia

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A/B index: ankle/brachial index

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AB: antibody, abortion, antibiotic

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ABD: abdomen

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ABG: arterial blood gas

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ABMT: autologous bone marrow transplantation

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ac: before eating (ante cibum)

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AC: assist controlled, air conduction

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ACCP: American College of Chest Physicians

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ACE: angiotensin-converting enzyme

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Ach-ase: acetylcholinesterase

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ACLS: Advanced Cardiac Life Support

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ACS: acute coronary syndrome, American Cancer Society, American College of Surgeons

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ACT: activated coagulation time

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ACTH: adrenocorticotropic hormone, corticotropin

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ADH: antidiuretic hormone

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ADHD: attention-deficit hyperactivity disorder

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ad lib: as much as needed (ad libitum)

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ad lib: as often as desired

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ADR: adverse drug reaction

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AED: automated external defibrillator

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AEIOU TIPS: mnemonic for Alcohol, Encephalopathy, Insulin, Opiates, Uremia, Trauma, Infection, Psychiatric, Syncope (diagnosis of coma)

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AF: afebrile, aortofemoral, atrial fibrillation

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AFB: acid-fast bacilli

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AFP: alpha-fetoprotein

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A/G: albumin/globulin ratio

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AHA: American Heart Association

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AHF: antihemophilic factor

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AI: aortic insufficiency

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AIDS: acquired immunodeficiency syndrome

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AJCC: American Joint Committee on Cancer

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AKA: above-the-knee amputation, also known as

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ALL: acute lymphocytic leukemia

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ALS: amyotrophic lateral sclerosis

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ALT: alanine aminotransferase

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am: morning

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AMA: American Medical Association

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amb: ambulate

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AMI: acute myocardial infarction

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AML: acute myelocytic leukemia, acute myelogenous leukemia

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AMMoL: acute monocytic leukemia

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amp: ampule

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AMP: adenosine monophosphate

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ANA: antinuclear antibody

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ANC: absolute neutrophil count

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