Articles & Guides
Calculator explanations, research methods and medical-learning articles from AchaWaqat.
-
BMI Calculator: Formula, Categories, and Limitations
Learn how BMI is calculated, understand adult weight categories, review worked examples, and recognise when BMI may give a misleading result.
-
Ideal Body Weight: Formulas, Uses, and Limitations
Learn how ideal body weight is calculated using common formulas, where clinicians use it, and why it should not be treated as a personal…
-
MELD Score Explained: Assessing Liver Disease Severity
Learn how the MELD score estimates short-term mortality in advanced liver disease and supports liver transplant prioritization and clinical decisions.
-
Glasgow Coma Scale: Scoring and Interpretation
Learn how the Glasgow Coma Scale scores eye, verbal, and motor responses, how totals are interpreted, and which limitations affect clinical use.
-
Wells Score for Pulmonary Embolism Explained
Learn how the Wells score estimates pulmonary embolism probability, how each criterion is scored, and how results guide D-dimer testing and imaging.
-
PERC Rule Explained: When It Is Used and Its Limitations
Learn how the PERC rule identifies very-low-risk patients who may not need pulmonary embolism testing, including its criteria and limitations.
-
Serum Osmolality Calculator: Formula, Uses, and Limitations
Calculate estimated serum osmolality from sodium, glucose, and BUN, then learn how clinicians interpret results, osmolal gaps, and limitations.
-
Body Surface Area Calculator: Mosteller Formula Explained
Calculate body surface area using the Mosteller formula and learn how BSA is applied, interpreted, and limited in clinical practice.
-
QTc Interval Explained: Formulas and Clinical Interpretation
Learn how the QTc interval is measured, which correction formulas are used, how results are interpreted, and why the clinical context matters.