Selasa, 24 Juli 2012


·         20% or greater above ideal body weight (IBW) (Met. Life Ins. tables); 170% of IBW or BMI > 40 is morbid obesity
·         Most practical index is BMI (body mass index) = weight/height2(kg/m2 )
o   BMI < 20 or > 27 leads to increased health risk

15-25% of North American adults

Possible Risk Factors
  • Increasing age
  • Genetic - variations in energy expenditure
  • Behaviour/lifestyle - diet and exercise
  • Secondary causes
o   Endocrine: e.g. Cushing’s syndrome, polycystic ovarian disease (PCOD)
o   Drugs: e.g. antidepressants, antiepileptics and antipsychotics
  • Hypothalamic injury: trauma, surgical, lesions in ventromedial or paraventricular median nucleus
Pathophysiology- positive energy balance: energy input > energy output


• Hypertension, CAD, CHF, varicose veins, sudden death from arrhythmia

• dyspnea, sleep apnea, pulmonary embolus, infections

• Gallbladder disease, gastroesophageal reflux disease (GERD), fatty liver

• Osteoarthritis

• impaired glucose tolerance (IGT) to type 2 DM, hyperuricemia, hyperlipidemia
• PCOD, hirsutism, irregular menses, infertility

Increased risk of neoplastic diseases
• Endometrial, post-menopausal breast, prostate, colorectal cancers


General recommendations
• Treatment should be based on medical risk
• Safest and best therapy is a comprehensive approach including caloric restriction,increased physical activity and behaviour modification

• Caloric restriction with a balanced diet with reduced fat, sugar and alcohol


Behavior modification
• Individual or group therapy
• Self-monitoring, stimulus control, stress management, cognitive change, crisis intervention

Drug therapy
• serotonergic-appetite suppressants fenfluramine-phentermine (Fen-Phen) were found to cause valvular heart disease and primary pulmonary hypertension (withdrawn)
• Pancreatic lipase inhibitor: orlistat (Xenical) found to be mildly to moderately effective 

Surgical therapy
• gastroplasty (“stomach stapling”) is treatment of last resort (controversial)
• Liposuction
• Weight loss is regained by fat accumulation at the same site or elsewhere

2 komentar:

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