For a patient weighing 70 kg who has not had any fluid intake from 10 PM until 8 AM before surgery, what is the estimated fluid imbalance?

For a patient weighing 70 kg who has not had any fluid intake from 10 PM until 8 AM before surgery, what is the estimated fluid imbalance?

• A. 700 cc
• B. 1100 cc
• C. 800 cc
• D. 900 cc

Answer: (B)

To determine the estimated fluid imbalance for a patient who has not had any fluid intake from 10 PM until 8 AM, we need to consider the time duration of fasting and calculate the fluid deficit based on typical hourly fluid requirements. The standard fluid requirement can be estimated using the "4-2-1 rule," which states that a patient requires 4 mL/kg for the first 10 kg of body weight, 2 mL/kg for the next 10 kg, and 1 mL/kg for each kg thereafter. For a patient weighing 70 kg, the fluid requirement can be calculated as follows: - For the first 10 kg: 4 mL/kg x 10 kg = 40 mL - For the next 10 kg: 2 mL/kg x 10 kg = 20 mL - For the remaining 50 kg: 1 mL/kg x 50 kg = 50 mL Adding these amounts gives a total hourly fluid requirement of: 40 mL + 20 mL + 50 mL = 110 mL/hr. The fasting period from 10 PM until 8 AM is 10 hours. Therefore, the estimated fluid deficit for this patient

To determine the estimated fluid imbalance for a patient who has not had any fluid intake from 10 PM until 8 AM, we need to consider the time duration of fasting and calculate the fluid deficit based on typical hourly fluid requirements.

The standard fluid requirement can be estimated using the "4-2-1 rule," which states that a patient requires 4 mL/kg for the first 10 kg of body weight, 2 mL/kg for the next 10 kg, and 1 mL/kg for each kg thereafter.

For a patient weighing 70 kg, the fluid requirement can be calculated as follows:

• For the first 10 kg: 4 mL/kg x 10 kg = 40 mL

• For the next 10 kg: 2 mL/kg x 10 kg = 20 mL

• For the remaining 50 kg: 1 mL/kg x 50 kg = 50 mL

Adding these amounts gives a total hourly fluid requirement of:

40 mL + 20 mL + 50 mL = 110 mL/hr.

The fasting period from 10 PM until 8 AM is 10 hours. Therefore, the estimated fluid deficit for this patient