hyperphosphatemia
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UPO4 �1500 mg/day
UPO4 �1500 mg/day
DecreasedPO4 excretion
Hyperphosphatemia(SPO4 �5.2 mg/dl)
CheckUPO4
MeasureCrCI
CrCI �25 ml/min
CrCI �25 ml/minCa �8.5 mg/dl
Ca 8.5-10.4 mg/dl
PTH �29 pmol/L
PTH 29-81 pmol/L
Decreased filtration
Decreased tubularclearance
CheckCa
CheckCa
Acute renal failureChronic renal failure
Cortical hyperostosisFamilial hyperphosphatemia
Respiratory acidosis
PseudohypoparathyroidismAbnormal PTHMultiple myeloma
HyperthyroidismAcromegalyPostmenopausal
Hormonal
Nonhormonal
Volume contractionMg deficiencyHyperthermiaTumor calcinosis
Hypoparathyroidism
Redistribution of phosphorus
Increasedphosphorus load
CheckHCO3
�
HCO3� �22 mEq/L
HCO3� �22 mEq/L
Anion gap 8-13
Anion gap �13
Miscellaneous causes
Acidosis
CheckLDH,UA,CPK
Cell destruction
Cutaneous
Enteral
Parenteral
Checkaniongap
Lactic acidosisDiabetic ketoacidosisTissue ischemia
CPK �110 mg/dlLDH �220 mg/dlUA �7.5 mg/dl
PO4 intakeVit D intoxication
Transfusion of stored bloodIntravenous PO4
White phosphorus burns
LeukemiaLymphoma
Replacement therapyPO4-containing laxatives or enemasEtidronate disodium
RhabdomyolysisHyperpyrexiaHemolysisNeoplasticTumor lysis syndrome
FIGURE 3-166 Approach to hyperphosphatemia. CT, Computed tomography; MRI, magnetic resonance imaging; T, thyroxine; TSH, thyroid-stimulating hormone. (From Healey PM: Common medical diagnosis: an algorithmic approach, ed 3, Philadelphia, 2000, WB Saunders.)
HYPERPHOSPHATEMIA ICD-9CM# 995.5 Child Maltreatment Syndrome
Hyperphosphatemia