Body measurements Info

Whole body counting also called total body counting measures the amount of naturally radioactive potassium 40 40 k in the body total body potassium or tbk. Clin phys physiol meas 1987. Its important to note. Total body potassium tbk is a method for measuring body composition. 1 mmol 1 milliequivalent meq or 391 mg potassium 3. Mmol measured by whole body 40k counting wbc was developed sm 00082tbk and validated in adults in a previous study.

Body potassium concentration is 4555 mmol kg 1 of body weight thus a 70 kg adult man contains approximately 135 g potassium. Its vital to the functioning of nerve and muscle cells. Pubmed crossref google scholar. 21 medium in which measured 1. This procedure accurately determines the bodys total cell mass that is the active growing tissues in the body which in turn can be used to estimate fat free or lean body mass. The total amount of potassium in the adult body is about 45 millimole mmolkg body weight about 140 g for a 175 pound adult.

Download citation total body potassium. Most potassium resides intracellularly and a small amount is in extracellular fluid 2 4. Your body needs potassium to function normally. A reference measurement for the body cell mass the quantitative in vivo measurement of radioactivity in the human body began with the development of. A comparison of the fat free mass of young adults estimated by anthropometry body density and total body potassium content. Therefore plasma and whole blood concentrations are 0107 mmoll lower than those in serum.

Potassium is released from platelets during clotting. Potassium can be measured in serum plasma lithium heparin or heparinanticoagulated whole blood. Thus repeated measurements of the serum potassium should be done. In an averaged size adult with a normal serum k of 4 meql a total body k deficit of 200400 meq is required to produce a decrease in plasma k of 1 meql. Kg mass estimation model based on total body potassium tbk. Total body potassium measurementthe effect of fallout from chernobyl.

Womersley j boddy k king pc durnin jvga. Potassium 40 is a naturally occurring isotope found in a known amount 00118 in intracellular water and is not present in stored triglycerides. A whole body skeletal muscle sm. A normal potassium level is between 36 and 52 millimoles per liter. It is unknown whether the adult tbk sm prediction model is applicable for pediatric use. Women contain 3540 mmol kg 1 of body weight and during childhood and in the elderly body potassium concentration is also lower than that for young men.