David’s grandfather, who is 76, has been suffering from congestive heart failure

Question

David’s grandfather, who is 76, has been suffering from congestive heart failure (CHF) for the last few years. This morning his legs are swollen, his pulse is racing, and he has difficulty breathing with even the lightest activities, such as moving from bed to a sofa. It’s definitely time for serious fluid restriction!

Can you help David calculate grandpa’s fluid allowance for today? David’s grandfather is 5’7” and weighs 172 lb. He already knows that, when it comes to his CHF crises, he has to lay off his favorite soups for a while and really follow the “prescribed” amounts of fluids. How many fluid ounces of liquids is he allowed to consume?

There's a homework question in the textbook Nutrition and You from Chapter 8 asking about Calculating Fluid Restriction. I believe that I was able to answer Part A based on the Math Video Activity provided but cannot find any reference in the book on how to calculate this for Part B. The video example provided is not extensive enough to cover this question. Is there a supplemental area in the book somewhere that would assist with this?

Explanation / Answer

Ans: First calculate BMI = [Wight in lbs x 703] / height in inch2

= 172x703 / 5.72 = 120916/32.49 = 3721/139.5 = ~26.9 that means he is overweight

If we convert his weight in to kg = 78.0179

Per kg wt normal person requires 32.99ml fluids

As Patient is with Congestive Heart Failure his fluid intake can be reduced by 50- 25% of normal persons that will be calculated as 1288-1931ml = Minimum 1.288-Maximum 1.931 litres per day

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