Creatinine Clearance Calculator For Any EMR
Age (years): {formtext: name=age}
{if: `weight units`="kgs"}Weight{note} (kg){endnote}: {formtext: name=weight}{formmenu: default=lbs; kgs; name=weight units}{note} Norm: 1 - 150 kgs{endnote}{endif}{if: `weight units`="lbs"}Weight{note} (lbs){endnote}: {formtext: name=weight}{formmenu: lbs; default=kgs; name=weight units}{note} Norm: 2 - 300 lbs{endnote}{endif}
{if: `height units`="cm"}Height{note} (cm){endnote}: {formtext: name=height}{formmenu: default=inches; cm; name=height units}{note} Norm: 152 - 213 cm{endnote}{endif}{if: `height units`="inches"}Height{note} (inches){endnote}: {formtext: name=height}{formmenu: default=inches; cm; name=height units}{note} Norm: 60 - 84 inches{endnote}{endif}
Sex: {formmenu: Male; Female; name=sex}
Results Original Cockcroft and Gault formula result: {=round(originalresult)} mL/min
Crockcroft and Gault formula using Ideal Body Weight: {=round(ibwresult)} mL/min
{if: bmi<18.5}Because BMI is under 18.5, it is recommended to use the unadjusted result.{elseif: bmi<25}Because BMI is between 18.5 and 25, it is recommended to use the Ideal Body Weight result.{elseif: BMI>25}Crockcroft and Gault formula using Adjusted Body Weight: {=round(adjustedresult)} mL/min
Because BMI >25, it is recommended to use the Adjusted Body Weight result.{endif} {formtoggle: name=Show evidence and formulas} Cockcroft-Gault formula for mL/min = (140 – age) × (weight in kg) × (0.85 if female) / (72 × SCR in mg/dL)
For Ideal Body Weight calculations, the following formula is used: Males: 50+(2.3*(height in inches-60)) Females: 45.5+(2.3*(height in inches-60))
Adjusted bodyweight is calculated as Ideal Body Weight + 0.4 * (actual weight - ideal body weight)
BMI is calculated using 703*(weight in pounds/(height in inches^2)) for imperial measurements, and weight in kg/(height in meters^2) for metric.{endformtoggle}{note: preview=no}
Original research: https://pubmed.ncbi.nlm.nih.gov/1244564/, https://pubmed.ncbi.nlm.nih.gov/22576791/
**CALCULATIONS** Transforming units: {kg=weight/2.2046 if `weight units`="lbs" else weight} {inches=height if `height units`="inches" else height/2.54} {meters=height*0.0254 if `height units`="inches" else height*0.01}
Ideal body weight {maleibw=50+(2.3*(inches-60))} {femaleibw=45.5+(2.3*(inches-60))}
Adjusted body weight {maleabw=maleibw+0.4*(kg-maleibw)} {femaleabw=femaleibw+0.4*(kg-maleibw)}
BMI {bmi=kg/(meters^2)}
FOR MALE {if: sex="Male"} {originalresult=((140-age)*kg)/(72*scr)} {ibwresult=((140-age)*maleibw)/(72*scr)} {adjustedresult=((140-age)*maleabw)/(72*scr)} {else} FOR FEMALE {originalresult=((((140-age)*kg)/(72*scr))*0.85)} {ibwresult=((((140-age)*femaleibw)/(72*scr))*0.85)} {adjustedresult=((((140-age)*femaleabw)/(72*scr))*0.85)} {endif}{endnote}
Copy templates to use them anywhere:
About the Creatinine Clearance Test
The creatinine clearance test is used to estimate how effectively your kidneys are filtering waste products from your blood. It is often used to assess kidney function and to diagnose or monitor conditions such as chronic kidney disease (CKD) and acute kidney injury (AKI). It can also help determine the appropriate dosage of medications that are primarily eliminated through the kidneys.
It's important to note that the creatinine clearance test has limitations. It may not provide an accurate estimate of kidney function in certain situations, such as in individuals with fluctuating kidney function, or those with significant muscle loss or muscle weakness.
This snippet (dot phrase) uses three forms of the Cockcroft-Gault formula:
- the original formula
- the formula using ideal body weight
- the formula using adjusted body weight for high BMI
Formula
Cockcroft-Gault CrCl, mL/min = (140 – age) × (weight, kg) × (0.85 if female) / (72 × Cr, mg/dL)
Ideal body weight (IBW), Devine equation:
- IBW, kg (male) = 50 + [ 2.3 × (height, inches – 60) ]
- IBW, kg (female) = 45.5 + [ 2.3 × (height, inches – 60) ]
- Adjusted body weight (ABW), kg = IBW, kg + 0.4 × (actual body weight, kg – IBW, kg)
Note: this snippet is based on this calculator from MDCalc.
