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Hypophosphatemia
Aka: Hypophosphatemia, Low Serum Phosphorus
- Causes
- Starvation
- Diabetic Ketoacidosis
- Total Parenteral Nutrition (TPN)
- Insulin
- Nasogastric Suction (NG Suction)
- Diuretics
- Vomiting
- Vitamin D Deficiency
- Hypoparathyroid
- Pseudohypoparathyroidism
- Medications
- Corticosteroids
- Aluminum Hydroxide Antacids
- Gram NegativeSepsis
- Evaluation
- Check Urinary Phosphate excretion (Urine Phosphorus)
- Low Urine Phosphorus: under 100 mg/d (FePO4 under 10%)
- Internal Redistribution
- Glucose administration
- Alkalosis
- DKA recovery
- Gastrointestinal Losses
- Malabsorption
- Vomiting
- Diarrhea
- Aluminum or MagnesiumAntacids
- High Urine Phosphorus: over 100mg/d (FePO4 over 20%)
- Check for wasting in urine of other Electrolytes
- Glucose
- Amino acid
- Uric Acid
- Bicarbonate
- Electrolyte Wasting present
- Fanconi's Syndrome
- Idiopathic
- Sporadic
- Familial
- Cystinosis
- Amyloidosis
- Multiple Myeloma
- Wilson's Disease
- Nephrotic Syndrome
- Cadmium toxicity
- Acute Lead Toxicity
- Electrolyte Wasting absent
- Increased Serum Calcium
- Primary or ectopic Hyperparathyroidism
- Normal or Low Serum Calcium
- Secondary Hyperparathyroidism
- Androgen or Estrogen treatment
- Thiazide Diuretics
- Vitamin D resistant Rickets
- Post Acute Tubular Necrosis
- Post-transplant
- Management
- See Phosphorus Replacement