#Body Mass Index (BMI)
Source: World Health Organization
BMI is a simple index of weight-for-height that is commonly used to classify underweight, overweight, and obesity in adults. It provides a useful population-level measure of overweight and obesity. However, BMI does not differentiate between body fat and muscle mass, so it's not a perfect measure.
| Range | Classification |
| < 18.5 | Underweight |
| 18.5-25 | Normal |
| 25-30 | Overweight |
| 30-35 | Obese Class I (Moderate) |
| 35-40 | Obese Class II (Severe) |
| ≥ 40 | Obese Class III (Very severe or morbidly obese) |
#Body Surface Area (Mosteller)
Source: Mosteller RD (1987)
The Mosteller formula is a commonly used method to calculate Body Surface Area, which is a measurement used in many medical tasks.
#Corrected Calcium based on Albumin
Source: Payne RB, et al. (1973)
Calcium levels in the blood can be affected by albumin levels, as calcium binds to albumin. Correcting calcium based on albumin provides a more accurate representation of calcium levels in various clinical scenarios.
#Corrected QT Interval
Source: Bazett HC (1920)
Source: Dmitrienke AA, et al. (2005)
Source: Fridericia LS (1920)
Source: Sagie A, et al. (1992, Framingham)
Source: Hodges MS, et al. (1983)
Source: Rautaharju PM, et al. (2014)
Calculates the corrected QT interval using various methods.
| Category | Males | Females |
| Normal | ≤ 440 ms | ≤ 450 ms |
| Borderline | 441-450 ms | 451-460 ms |
| Prolonged | > 450 ms | > 460 ms |
| High Torsades de pointes risk | > 500 ms | > 500 ms |
#Corrected Sodium for Hyperglycaemia
Source: Katz MA (1973)
Source: Hillier TA, et al. (1999)
Corrects serum sodium levels based on elevated blood glucose levels using various methods. Values are rounded to the nearest integer.
#Cycle Time to Heart Rate
Converts cycle time in milliseconds (ms) to heart rate in beats per minute (BPM) rounded to the nearest integer.
#Heart Rate to Cycle Time
Converts heart rate in beats per minute (BPM) to cycle time in milliseconds (ms).
#LDL Calculation (Friedewald Equation)
Source: Friedewald WT, Levy RI and Fredrickson DS (1972)
Estimates LDL cholesterol using the Friedewald equation, which requires total cholesterol, HDL cholesterol, and triglycerides.
| LDL Level (mg/dL) | Interpretation |
| < 100 | Optimal |
| 100-130 | Near/Above Optimal |
| 130-160 | Borderline High |
| 160-190 | High |
| ≥ 190 | Very High |
#MDRD GFR Equation
Source: Levey AS, et al. (1999)
The MDRD formula is a widely used equation to estimate the glomerular filtration rate based on serum creatinine, age, and race.
#Mean Arterial Pressure (MAP)
The MAP is an average blood pressure in an individual. It's used to give a general overview of blood flow and perfusion. A normal MAP is usually 70-110 mmHg.