# Often asked: What Weight Should I Use For Cockcroft Gault?

Cockcroft and Gault equation utilizing the ibw (Ideal body weight) to calculate an estimated creatinine clearance. actual body weight for calculating the CRCL. Males: IBW = 50 kg + 2.3 kg for each inch over 5 feet. Females: IBW = 45.5 kg + 2.3 kg for each inch over 5 feet.

## When should I use ideal weight for CrCl?

Some systems automatically calculate creatinine clearance using ideal body weight if the actual body weight is >120% ideal body weight. Therefore, in patients whose actual body weight is >120% IBW, these digital systems should not be used to calculate a creatinine clearance which will be used to adjust the DOAC dose.

## When do you use ABW or IBW?

05/24/2016 – Although limited research exists, ABW and IBW have both been used when assessing energy and protein needs in critically ill overweight and obese patients when a hypocaloric and/or high protein feeding has been prescribed.

## How do you use the Cockcroft-Gault equation?

What is the Cockcroft-Gault formula for estimating creatinine clearance (CrCl) and how is it used in patients with chronic kidney disease (CKD)?

1. CrCl (male) = ([140-age] × weight in kg)/(serum creatinine × 72)
2. CrCl (female) = CrCl (male) × 0.85.
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## How do you calculate CrCl in underweight?

Rounding Creatinine in Underweight Patients The most accurate method to control for underweight patients is to multiply the patient’s Cockcroft-Gault value by an adjustment factor of 0.69 (regardless of whether the patient’s serum creatinine is above or below 1 mg/dL).

## What weight should I use for vancomycin?

The 2011 Infectious Diseases Society of America (IDSA) MRSA guidelines recommend that vancomycin be dosed at 15 to 20 mg/kg/dose (actual body weight) every 8 to 12 hours, not to exceed 2 g per dose, in patients with normal renal function.

## Can you calculate CrCL without height?

Creatinine Clearance (CrCl) You cannot choose the incorrect weight. Example: MR’s TBW is 90 kg, IBW 59.2 kg, and AdjBW is 71.3 kg. If no height is provided, you can only use TBW because you cannot calculate IBW without height.

## Do you use IBW for underweight patients?

The use of IBW leads to over-feeding in underweight patients and under- feeding in overweight patients.

## How do you calculate ABW and IBW?

ABW = IBW + 0.4 (actual weight – IBW) The IBW and ABW are used to calculate medication dosages when the patient is obese. This formula only applies to persons 60 inches (152 cm) or taller.

## Can weight loss lower creatinine levels?

Both fat and lean body mass decrease with weight loss, and reduction in muscle mass could lead to lower serum creatinine levels and, thus, higher eGFR. These effects are more pronounced with surgical weight loss than the modest weight loss achieved with lifestyle modifications and medications.

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## Does weight affect creatinine levels?

Several epidemiological studies have suggested that the association between BMI and creatinine clearance is related to obesity and the amount of body fat or body fat distribution, the latter using measurements of waist and hip circumferences (7,8,10,13,33).

## Does weight affect GFR?

In the Cockcroft-Gault equation, body weight is proportional to GFR; therefore, increasing body weight without a proportional increase in creatinine generation will tend to increase the estimation of GFR.

## What is modified Cockcroft-Gault?

A modified Cockcroft-Gault formula taking into account the body surface area gives a more accurate estimation of the glomerular filtration rate. J Nephrol.

## What is normal glomerular filtration rate?

According to the National Kidney Foundation, normal results range from 90 to 120 mL/min/1.73 m2. Older people will have lower than normal GFR levels because GFR decreases with age. Normal value ranges may vary slightly among different laboratories.

## What is a normal CrCL?

Clearance is often measured as milliliters per minute (mL/min) or milliliters per second (mL/s). Normal values are: Male: 97 to 137 mL/min (1.65 to 2.33 mL/s). Female: 88 to 128 mL/min (1.496 to 2.18 mL/s).