When do i use adjusted body weight

Disease is diagnosed: prognosticate to guide treatment Prognosis. Numerical inputs and outputs Formula. Med treatment and more Treatment. Suggested protocols Algorithm. Disease Select Specialty Select Chief Complaint Select Organ System Select Log In. Email Address. Password Show. Or create a new account it's free. Forgot Password? Sign In Required. To save favorites, you must log in. Creating an account is free, easy, and takes about 60 seconds. Currently, the vast majority of medications recommend calculation of the Cockcroft-Gault equation to estimate CrCl for dose adjustments based on renal function.

The calculation hierarchy described above is followed by most electronic medical records when calculating CrCl. However, there is a small minority of medications that recommend using actual body weight in the Cockcroft-Gault formula regardless of extremes Table. Underestimation of renal function may occur when using the incorrect weight to calculate CrCl, leading to inappropriate dose reductions. One study retrospectively evaluated patients on dabigtran and rivaroxaban for appropriateness of dosing based on the package insert recommendations for renal insufficiency.

Renal function was calculated using both ideal and actual body weights of patients. Nine of those patients inappropriately had their dose reduced to 15 mg daily.

Two of those patients had inappropriate dose reductions to 75 mg twice-daily. There was a small amount of patients who necessitated dose reductions and an even smaller number of patients who had inappropriate dose reductions 3. Overall, pharmacists should be aware of the medications that are outliers in clinical practice to optimize dosing. Adjusted body weight sometimes abbreviated to AjBW is a measure used for calculating a person's nutritional needs , popular among dietitians when they are tasked with setting up a weight loss program.

It is especially useful when the patient is overweight or obese. As adipose tissue is less metabolically active than lean tissue , using actual body weight for calculating one's energy requirements might result in some overestimations for people above their healthy BMI.

Hence, it's often recommended to use AjBW instead. Of course, our calculator will do the work for you quickly and effectively. Nevertheless, it may be worth knowing how to calculate adjusted body weight on your own - you never know when you will find yourself needing to giving nutritional advice with no device to access our calculator at hand! Let's say we want to determine the nutritional needs for a man who is centimeters tall and weighs 90 kilograms.

From the ideal weight formula, we get that his ideal weight would be So we know that:. Now we know that when it comes to setting up a daily diet , this particular man should be treated as if he weighed It's essential to keep in mind that the adjusted body weight calculator is not appropriate in all situations. One should only use it when their excess weight comes from adipose tissue.

For example, many athletes weigh more than their appearance may suggest, and their simple BMIs are theoretically above the healthy level. Their "excess" weight comes from lean muscle tissue. In this case, AjBW does not apply. Another case where you should not rely on your adjusted body weight to calculate your needs is during pregnancy. If you're expecting a child and you're interested in how it might affect your weight, as well what a healthy diet is for you and your child, please refer to our pregnancy weight gain calculator.