RJL Quantum analyzers utilize bioelectrical impedance analysis to gain safe, reliable and accurate body composition data for your patients.

Quantum Analyzers are registered with the FDA as a Class II Medical Device, and have been featured in over 1000 research articles and papers on human health. Accurate graphically-represented results help you devise specific strategies to get your patients to their goals – and keep them motivated. RJL Quantum analyzers have been trusted by clinicians and researchers worldwide for over 30 years.

It’s time we all knew the specific body composition data, instead of a general, simple number on the scale. Patients become much more motivated to make and sustain lifestyle changes when you can offer graphically-represented evidence of the actual changes occurring in specific and detailed body components.

The portability, safety and accuracy of the Quantum Analyzer make it a first choice among practitioners to track monitor patient progress.  MDs, DOs, NDs, DCs and NPs tell us that having access to professional and reliable body composition assessment is critical to the new focus on preventive lifestyle change practices.

Here is just a sampling of where Quantum Analyzers have been utilized, but feel free to later browse the Research area of our site.

  • Obesity – To provide specific body composition factor measurements and changes
  • Cancer – To measure fluid, composition and other changes in various cancer types
  • Nephrology- To monitor intracellular, extracellular and total body water changes
  • Diabetes – To measure effects of lifestyle changes on known diabetes risk factors
  • Wasting Diseases – To measure and manage specific changes in body composition
  • Surgery – To better manage postoperative bariatric complications and nutritional status

Digant Gupta et-al wrote a series of papers on phase angle (ratio of reactance / resistance) in predicting the prognosis in advanced cancers [1,2,3]. D.P. Mellar[4] and L. Santarpia[5] also published on the importance of measuring phase angle in the presence of cancer and chemotherapy. The number of validation papers for assessing body fat compared to DEXA, hydrodensitometry and skin fold measurements are too numerous to mention. Even though there have been hundreds of validation papers published that compliment BIA, there are very few papers describing the utility of BIA. The most significant characteristic of BIA is its repeatability and, therefore, its ability to track change. An example of this is assessing hydration disorders in nursing homes [6] and hospital patients while taking pharmaceutical agents such as diuretics. BIA could define a base line hydration index on elderly heart disease patients that can be kept in balance by daily monitoring at home.

Abstracts of Papers written about BIA

1. Digant Gupta, Carolyn A Lammersfeld, Jessica L Burrows, Sadie L Dahlk, Pankaj G Vashi, James F Grutsch, Sara Hoffman, and Christopher G Lis Bioelectrical impedance phase angle in clinical practice: implications for prognosis in advanced colorectal cancer Am J Clin Nutr 2004;80:1634-8.

2. Digant Gupta*, Christopher G. Lis, Sadie L. Dahlk, Pankaj G. Vashi, James F. Grutsch and Carolyn A. Lammersfeld Bioelectrical impedance phase angle as a prognostic indicator in advanced pancreatic cancer British Journal of Nutrition (2004) 92, 957-962.

3. Digant Gupta, Carolyn A Lammersfeld, Pankaj G Vashi, Jessica King, Sadie L Dahlk, James F Grutsch and Christopher G Lis Bioelectrical impedance phase angle as a prognostic indicator in breast cancer BMC Cancer 2008, 8:249.

4. Mellar P. Davis, MD, FCCP, Tugba Yavuzsen, MD, Dilara Khoshknabi, MD, Jordanka Kirkova, MD, Declan Walsh, MSc, FACP, FRCP, Lasheen Wael, MD, Ruth Lagman, MD, MPH, FACP, and Matthew T. Karafa, PhD. Bioelectrical Impedance Phase Angle Changes During Hydration and Prognosis in Advanced Cancer AM J HOSP PALLIAT CARE January 30, 2009:10.1177.

5. Lidia Santarpia, MD, Ph.D.*, Maurizio Marra, B.S., Concetta Montagnese, B.S., Lucia Alfonsi, M.D., Fabrizio Pasanisi, M.D., and Franco Contaldo, M.D. Prognostic significance of bioelectrical impedance phase angle in advanced cancer: Preliminary observations Nutrition 25 (2009) 930-931.

6. Robert D. Allison, PhD, A. Ray Lewis, DO, Rudy Liedtke, BEE, N. Dean Buchmeyer, MD and Harold Frank, MD Early Identification of Hypovolemia Using Total Body Resistance Measurements in Long-Term Care Facility Residents Gender Medicine/Vol 2 No 1, 2005.