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Related Concept Videos

Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

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Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
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Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

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Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area.
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Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance01:25

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In healthy individuals, serum creatinine levels remain stable due to a balance between its constant production—primarily from muscle metabolism—and renal excretion. Creatinine is freely filtered by the glomeruli, making it a valuable marker for estimating renal function. When the glomerular filtration rate (GFR) decreases, the kidneys can only eliminate less creatinine, causing serum levels to rise.Serum creatinine concentration is widely used to estimate creatinine clearance...
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Introduction to Electrolytes01:33

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In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
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Updated: Oct 22, 2025

Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology
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Serum magnesium: time for a standardized and evidence-based reference range.

Oliver Micke1, Jürgen Vormann2, Anton Kraus3

  • 1Department of Radiation Therapy and Radiation Oncology, Franziskus Hospital, Bielefeld, Germany, President of the German Society for Magnesium Research e.V.

Magnesium Research
|August 31, 2021
PubMed
Summary
This summary is machine-generated.

Magnesium deficiency poses health risks like type 2 diabetes. Current serum magnesium reference ranges may miss deficiencies, necessitating a higher lower limit for better detection.

Keywords:
diagnosticshypomagnesemiamagnesiummagnesium deficiencyreference range

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Area of Science:

  • Clinical biochemistry
  • Nutritional science
  • Internal medicine

Background:

  • Magnesium deficiency is linked to serious health issues, including type 2 diabetes and cardiovascular diseases.
  • Despite recognized importance, magnesium is underemphasized in clinical practice due to a lack of uniform, evidence-based reference ranges.
  • Serum magnesium concentration has limited diagnostic value as body pools buffer low levels.

Purpose of the Study:

  • To highlight the clinical significance of magnesium deficiency.
  • To advocate for the inclusion of serum magnesium in routine diagnostics.
  • To propose an updated, evidence-based reference range for serum magnesium.

Main Methods:

  • Review of current scientific data on magnesium levels and health risks.
  • Analysis of existing reference ranges for serum magnesium.
  • Comparison of serum magnesium values with health outcomes.

Main Results:

  • Low serum magnesium and intake are risk factors for type 2 diabetes and cardiovascular diseases.
  • Current reference ranges (0.75–0.95 mmol/L) may not adequately identify deficiency.
  • Serum magnesium values below 0.85 mmol/L are associated with increased health risks.

Conclusions:

  • Serum magnesium testing should be routine for improved deficiency detection.
  • The lower limit of the serum magnesium reference range should be raised to 0.85 mmol/L (2.07 mg/dL).
  • Adjusting the reference range will enhance the identification of at-risk individuals and prompt timely intervention.