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Copyright: ©Author(s) 2026.
World J Clin Pediatr. Dec 9, 2026; 15(4): 122166
Published online Dec 9, 2026. doi: 10.5409/wjcp.122166
Figure 4
Figure 4 Indices to ascertain renal phosphorus wasting in hypophosphatemia. 1Falsely low values in severe hypophosphatemia. 2May be used across all ranges of TRP and falsely low values in severe hypophosphatemia. 3Limitations: (1) Ideally requires oral phosphorus Loading; (2) Nomogram established for adults - children have physiologically higher serum phosphorus levels; (3) Overestimates tubular maximum reabsorption of phosphate/glomerular filtration rate if TRP > 0.8; and (4) Falsely low values in severe hypophosphatemia. UPhosphate: Urinary phosphate; UCreatinine: Urinary creatinine; PPhosphate: Plasma phosphate, PCreatinine: Plasma creatinine; TP: Tubular phosphate; GFR: Glomerular filtration rate; TRP: Tubular reabsorption of phosphate; PO4: Phosphorus; TmP: Tubular maximum reabsorption of phosphate.


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