Phosphorous

Question 1

Where is phosphorous primarily found?

Answer 1

primarily found in bone (85%)

15% is in the ICF

Question 2

____________ is a source of phosphate for ATP and phospholipid synthesis

Answer 2

Phosphorous

Question 3

What 3 things determine the phosphorous serum level?

Answer 3

1. Dietary intake
2. renal function
3. PTH levels

Question 4

How is hypophosphatemia classified?

Answer 4

serum level < 2.5 mg/dL

Question 5

How is severe hypophosphatemia classified?

Answer 5

< 1 mg/dL

Question 6

What are some causes of hypophosphatemia?

Answer 6

• shift to ICF (hyperglycemia, insulin, malnutrition)
• decrease absorption (starvation, vit D deficiencym diarrhea/laxatives)
• increased renal loss
• meds

Question 7

What are some meds that can cause hypophosphatemia?

Answer 7

diuretics
sucralfate
steroids
antacids
phenobarb/phenytoin

Question 8

What is the key electrolyte to monitor when you start a pt on IV nutrition?

Answer 8

phosphate

Question 9

What is the clinical presentation of hypophosphatemia?

Answer 9

paresthesias
muscle weakness, myalgias
anorexia, N/V
impaired diaphragmatic contractility
acute respiratory failure
seizures, coma

Question 10

How is moderate hypophosphatemia treated?

Classified as 1-2.5 mg/dL

Answer 10

oral products
Neutra-phos, K-phos
watch for diarrhea

Question 11

How do you treat severe or critically ill patients due to hypophosphatemia?

Answer 11

dd