Fluids Flashcards
(18 cards)
What are sources of fluid loss? [3]
What are the requirements for maintenence fluids over 24hrs for:
- water
- K
- Na
- Cl
- glucose
How do you calculate the rough weight based estimate of total body water in adults? [1] (different in men vs women)
Multiply patients body weight by 0.6 (man) or 0.5 (women)
How of total body weight does intracellular and extracellular water components take up? [2]
Intra: 40%
Extra: 20%
What are the components of extra vs intracellular fluids like? [2]
How much water is released by metabolism per day? [1]
~ 400mls
What are insensible losses of fluid? [1]
How much occurs in the average person per day? [2]
How do you assess fluid status? [6]
Whats the fluid loss [1]
A 60-year-old man is two days post-colectomy (no stoma). He is drinking 500 ml per day, and his urine output is 1500 ml per day. Assume insensible losses of 800 ml per day. Which ONE of the following volumes is his total fluid deficit over two days?
500 ml
750 ml
1400 ml
2800 ml
3600 ml
In fluid replacement for an adult, you should aim for a minimum urine output of which ONE of the following?
0.5 ml/kg/hour
1 ml/kg/hour
1.5 ml/kg/hour
2 ml/kg/hour
2.5 ml/kg/hour
0.5 ml/kg/hour
Which ONE of the following options is the approximate amount of total body water in a 40-year-old man weighing 78 kg? (Round your answer to the nearest whole number)
31 litres
47 litres
62 litres
78 litres
Approximately 50- 60% of total body weight in adults is made up from total body water. As a percentage of total body weight, the total body water decreases with increasing age.
An easy way to provide a rough weight-based estimate of total body water in adults is to multiply the patient’s body weight by 0.6 (in men) and 0.5 (in woman).
The approximate total body water in a 78 kg man would be: 78 x 0.6 = 47 litres.
