Clinical Evaluation of the Zynex Blood Volume Monitor (CM-1500) in Healthy Male Adult Subjects During a Blood Draw

Inclusion Criteria: * Written informed consent * Male, 18-65 years of age * Subject is suitable for a blood draw of a pint of blood * Weighs at least 110 pounds Exclusion Criteria: * Subject has a heart condition that may interfere with the Zynex CM-1500 * Subject has unstable or untreated heart disease * Subject has been diagnosed with chronic fatigue syndrome * Subject is taking coumadin (warfarin), heparin, or other prescription blood thinners for at least 7 days prior to blood draw * Subject donated blood within 8 weeks prior to blood draw * Subject has high or low blood pressure on the day of blood draw * Subject hemoglobin \< 12.5 g/dL