The body composition analyzer applies the principle of multi-frequency bioelectrical impedance testing and adopts the 8-point touch electrode method to test the bioimpedance of various parts of the human body and detect various constituent elements of the human body (including: weight, muscle mass, water, protein, bone mass, fat, waist-to-hip ratio, etc.) to analyze the health status of the human body. This instrument has the function of body composition analysis, muscle fat analysis, obesity analysis, health assessment, etc. It can provide scientific basis for predicting the risk of many common chronic complications, nutritional status, health status, weight control, weight loss, fitness, slimming and shaping, etc. Indications: 1, obese people. 2, diagnosis of lifestyle-related diseases: such as hypertension, diabetes, atherosclerosis, hyperlipidemia, fatty liver, etc. 3.Nutritional status examination: physical status examination of the elderly, chronic disease patients, frail children, menopausal women. 4.Prevention of osteoporosis, which can be combined with bone density examination. 5.Segmental body part development information: ①Imbalance check: special exercise (swimming, tennis, etc.), polio, fracture, bone fracture and sprain, etc. ② Monitoring of muscle volume changes: rehabilitated patients, elderly, etc. 6, edema: patients with chronic liver disease, frail elderly and severely obese people. 7, health check-up population. Contraindications: 1, the body has any implanted electronic devices (such as pacemakers, etc.), metal (such as steel plates, etc.) or non-metallic implants, pregnant women, etc., the use of this instrument is prohibited to measure. 2.Patients who have difficulty in contacting the electrodes with their hands and feet or who lack hands and feet cannot use this instrument for analysis. 3.Patients who cannot stand alone due to serious diseases. Basic requirements for the examination: Age: 7 to 99 years old Height: 50 to 210 cm Weight: 10 to 250 kg Preparation before the examination: 1, the patient should not be strenuously active before the examination. 2, the examination time is best in fasting or after 2 hours after meals. 3, patients should not take a bath before the examination, but at room temperature. 4, the examination before the need to empty the urine and stool. 5, try to reduce clothing and decorations to obtain the net weight, so as not to affect the accuracy of the data. Observation items of the examination report: 1, obesity: body fat percentage, waist-hip ratio, visceral fat index, basal metabolic rate, weight (BMI) class. 2. Diagnosis of lifestyle-related diseases: body fat percentage, waist-to-hip ratio, visceral fat index, edema coefficient, muscle analysis. 3.Nutritional status examination: defatted weight, fat, bone mass, protein, water, inorganic salt. 4.Osteoporosis: inorganic salt, bone quality. 5.Segmental body part development information: muscle analysis, segmental analysis. 6.Oedema: total water, intracellular fluid, extracellular fluid, edema coefficient.