bia in practice

Bioimpedance testing is clinically proven and safe. Powered by a rechargeable battery pack, analyzers apply a test current of less than one milliampere (800 ľA). This test current is below the patient's sensory level.

The test current (800 ľA at 50 kHz) is below the Association for Advancement of Medical Instrumentation's (AAMI) standard (ES1-1985), for "Safe Current Limits."

However, we recommend that bioimpedance testing not be performed on the following patients without physician supervision:

Persons To Be Tested Only With Physician Supervision

• Pregnant women
• Persons with any implantable electronic device
• Persons with diagnosed heart problems

No historical or clinical evidence has suggested that bioimpedance testing is unsafe for pregnant women or persons with preexisting heart conditions. However, an extra measure of caution is always warranted in these cases and is recommended.

While there is no historical or clinical evidence that pacemakers are affected by bioimpedance testing, pacemaker manufacturers recommend that persons with pacemakers should avoid external electrical currents. Bioimpedance testing will not damage a pacemaker.

Possible Effect of External Electrical Currents On Pacemakers

• The pacemaker may temporarily stop.
• The pacemaker may temporarily revert to a preset rate which is used when the voltage level of the heart is not able to be measured.
• The pacemaker may temporarily interpret an inaccurate voltage level within the heart, causing the pace rate to decrease or increase.
copyright © 1998 - biodynamics corporation