Functional Medicine

Bioimpedance Analysis Principles | El Paso, Tx.

Share

Bioimpedance Analysis (BIA) is defined as the analysis of resistance and reactance in the human body.

  • Energy dissipation is called resistance (R).
  • Energy storage is called reactance (X).
  • Units of resistance and reactance are called ohms.
  • Resistance and reactance taken together create impedance (Z).
  • Fat-free mass in the human body is proportional to its resistance.
  • Body cell mass is proportional to its reactance.
  • A bioimpedance analyzer is a device that contains a highly precise frequency meter, a processor, and a printer. The meter is called an impedance meter. It measures resistance and reactance.
  • The microprocessor computes the size of the fat-free mass and body cell mass along with all subsequent calculations.
  • A bioimpedance analyzer measures resistance and reactance, computes fat-free mass, body cell mass, total body water, and intracellular water.
  • To measure resistance and reactance, the bioimpedance analyzer generates a small electrical current to the body.

Measurements

  • Bioimpedance analysis is an assessment of change in electrical tissue conductivity, which indicates altered body composition.
  • The following electrical characteristics are measured and used to evaluate body composition.
  • Impedance (Z)
  • Impedance is a measurement of a medium to conduct current. It is a ratio of voltage injected current in a conductive medium and has two components: resistance and reactance.
  • Resistance (R)
  • Resistance is the component of impedance related to the dissipation of energy.
  • Reactance (X)
  • Reactance is the component of impedance related to the storage of energy.
  • Phase Angle (?)
  • Phase angle is a time delay between stimulating current and the voltage generated by an alternating current. The phase angle is expressed in degrees.
  • Electrical characteristics and their relation to each other?
  • The time relationship of voltage, current, and phase is shown below.

The Circuit

  • Water is the body’s conductor and determines the resistance.
  • Electrolytic fluid in fat-free mass consists of water and charged ions that conduct electrical current.
  • Extracellular fluid (water and ionized sodium Na+) provides a low-resistance pathway.
  • Intracellular fluid (water and ionized potassium K+) provides a low-resistance pathway.
  • Fat mass is non-conductive because there is no water.
  • Cell membranes within intracellular mass determine reactance.
  • The cell membranes consist of a layer of nonconductive, lipophilic material interposed between two layers of conductive molecules. They are tiny capacitors that store electrical charge.
  • Extracellular pathway (which is sodium ionized water) is represented by single resistance.
  • Intracellular pathway (potassium ionized water and cell membranes) is represented by resistance and reactance.
  • Total resistance is proportional to the amount of fat-free mass.
  • Reactance is proportional to body cell mass (intracellular mass).
  • The meter reports total resistance and total reactance to the microprocessor.

Equation for Regression

  • Bioimpedance analyzers use algorithms to compute amounts of fat-free mass, body cell mass, body water, and intracellular water.
  • What is the regression equation?
  • This equation is a mathematical formula that predicts the relationship between two or more variables based on the analysis of data.
  • For example, total body water regression equation
  • (TBW) = form:
  • TBW = a * Ht2 / R + b * Weight + c * Age + d
  • The terms are Ht2 / R, Weight, and Age.
  • The weighting constants are a, b, c, and d.
  • Resistance, height, weight, gender, and age are supplied for each subject. A computer then generates an algorithm which best describes the relationship between TBW, resistance, height, weight, gender, and age.
  • This is called Regression Analysis.

How do you use regression equations?

  • Once the bioimpedance analyzer measures the resistance and reactance, the results are sent to the microprocessor to perform the calculations. All the equations, (FFM, BCM, TBW, and ICW) are encoded into the analyzer’s software.

Diagram

  • Fat-Free Mass
  • Fat-free mass is derived by applying a small alternating current to the body.
  • The resistance of the body is measured using the measured resistance (R), the analyzer estimates the fat-free mass.
  • Body Cell Mass
  • Body cell mass is derived by measuring both the resistance (R) and reactance (X) of the body. With this measurement, the analyzer estimates body cell mass.
  • Total Body Water
  • Using the measured resistance, the analyzer estimates total body water.
  • Intracellular Water
  • Using the measured resistance and reactance, the analyzer estimates intracellular water.
Post Disclaimer

Professional Scope of Practice *

The information herein on "Bioimpedance Analysis Principles | El Paso, Tx." is not intended to replace a one-on-one relationship with a qualified health care professional, licensed physician, and is not medical advice. We encourage you to make your own health care decisions based on your research and partnership with a qualified health care professional.

Our information scope is limited to chiropractic, musculoskeletal, physical medicines, wellness, sensitive health issues, functional medicine articles, topics, and discussions. We provide and present clinical collaboration with specialists from a wide array of disciplines. Each specialist is governed by their professional scope of practice and their jurisdiction of licensure. We use functional health & wellness protocols to treat and support care for the injuries or disorders of the musculoskeletal system.

Our videos, posts, topics, subjects, and insights cover clinical matters, issues, and topics that relate to and support, directly or indirectly, our clinical scope of practice.*

Our office has made a reasonable attempt to provide supportive citations and has identified the relevant research study or studies supporting our posts. We provide copies of supporting research studies available to regulatory boards and the public upon request.

We understand that we cover matters that require an additional explanation of how it may assist in a particular care plan or treatment protocol; therefore, to further discuss the subject matter above, please feel free to ask Dr. Alex Jimenez or contact us at 915-850-0900.

We are here to help you and your family.

Blessings

Dr. Alex Jimenez DC, MSACP, CCST, IFMCP*, CIFM*, ATN*

email: coach@elpasofunctionalmedicine.com

Licensed in: Texas & New Mexico*

Recent Posts

Carpal Tunnel Prevention

Today, we are constantly tapping, scrolling, clicking, using our hands, fingers, and thumbs on smartphones,… Read More

October 15, 2021

CBD, THC & HEMP? What is the difference? | El Paso, TX (2021)

https://youtu.be/sOolG4CEBic On today’s podcast Spencer Salas and Dr. Alex Jimenez discuss CBD, TCH, and Hemp.… Read More

October 15, 2021

Drained Energy: Boost The Central Nervous System

The body needs consistent energy to get through the day. The central nervous system runs… Read More

October 14, 2021

Exercises For An Aching Back

Reaching, twisting, walking, and driving are everyday activities that require upper and lower back strength.… Read More

October 13, 2021

How to Choose? Good or Bad Supplements? | El Paso, TX (2021)

https://youtu.be/o348pjL26pE Dietary Supplement Quality Guide: Dr. Jimenez, Health coaches Adriana Caceres and Faith Arciniega, and… Read More

October 13, 2021

When Chronic Back Pain Is Actually A Medical Condition

Back pain usually comes from lifting an object the wrong way or awkwardly moving the… Read More

October 12, 2021

Personal Injury, Trauma & Spine Rehab. Specialists

Online History & Registration 🔘
Call Us Today 🔘