The basic physiological functions of the kidney include clearing metabolic waste, regulating volume and electrolyte balance, co-controlling blood pressure and regulating the generation of red blood cells. In clinical practice, there are corresponding methods to evaluate each physiological function of the kidney. For example, laboratory testing can reveal toxin clearance, red blood cell and electrolyte level, and blood pressure changes can be monitored using a sphygmomanometer. But what about the kidney's function in regulating volume?
From a clinical perspective, assessing a patient's volume status can be done through physical examination by observing the degree of jugular vein distension and leg edema, or by using imaging examination such as chest X-ray to observe whether the heart border is enlarged. These are relatively traditional methods to assess volume loading. However, in recent years, we have begun to try new evaluation methods - body composition analysis (BCM).
Body composition analysis uses the biotechnology of a body composition analyzer machine to test the biological impedance of various parts of the body based on human biological characteristics, accurately analyze various elements of the body, and can easily measure important body parameters of the subject within one minute. It is a method of analyzing body health status and has the advantages of convenience, speed and non-invasiveness. The inspection report can be obtained immediately.
The body composition analysis test can provide independent health analysis data and suggestions for each subject, helping them find ways to improve their physical condition and establish a new health management plan.
The body composition analyzer machine mainly measures parameters such as height, weight, ideal weight, body mass index, body fat, muscle mass, total body water, etc. It can monitor the water load of the body, detect excess water in the body, and guide the setting of dehydration amount in dialysis process. It can also suggest suitable exercise and diet formula, which is very important for our dialysis friends.
The subject must not drink alcohol 24 hours before the test.
The subject should try to maintain stability and avoid vigorous activities before the measurement. During the entire measurement process, the subject should not move or speak, and should stay relaxed with limbs stretched out, ensuring that the arms are separated from the trunk to avoid affecting the test results.
The BCM emits very low electrical current, which the subject will not feel passing through their body. However, the BCM should not be used by subjects with pacemakers or implanted automatic defibrillators.
Remove all metal accessories, especially watches and rings, and electronic products such as mobile phones and electronic sports wristbands.
Removing metal objects will help obtain more accurate results.
Lie flat for at least 10 minutes before the measurement to ensure fluid balance. This is important for obtaining accurate results.
Do not drink beverages containing caffeine or alcohol or eat excessively 2 hours before the measurement.
The best population for the body composition analyzer machine(including other populations) are:
Elderly people who are not sensitive to measuring body weight and blood pressure, and whose water is easily distributed in tissue gaps;
Patients with poor nutritional status, such as thin skin folds, high fat content, and difficult to evaluate water retention;
Patients who are immobile or bedridden and unable to weigh themselves, with muscle atrophy, etc.;
Patients with heart failure and edema, for whom measuring the body/cardiac ratio is an important method outside the scope of normal measurement.
The parameters displayed after the measurement can provide a relatively intuitive overview of the body composition measurement, including quantifying excessive water in the individual, determining the urea distribution volume for dialysis dose assessment, providing accurate nutrition assessment basis, and other detailed information on body composition. The entire measurement process is fast and painless, and the patient does not need to bear too much psychological burden or spend too much time.