Calcium and phosphorus metabolism and lithogenic factors in patients with osteoporotic fracture

Actas Urol Esp. 2015 Jun;39(5):279-82. doi: 10.1016/j.acuro.2014.12.004. Epub 2015 Feb 20.
[Article in English, Spanish]

Abstract

Objectives: To demonstrate the attendance of mineral metabolism disorders and lithogenic factors in patients' urine with osteoporotic fracture without previously known stones

Material and methods: 67 patients with osteoporotic fractures surgically treated in trauma service are included. The area of the fracture site, fracture mechanism and the presence of osteoporosis were the factors taken into account to diagnose osteoporotic fracture. Mineral metabolism, calciuria, oxaluria, uricosuria and citraturia in 24hours urine were analyzed. The presence of abnormal calcium and phosphorus metabolism was proved comparing hypercalciuria patients with normocalciuria ones.

Results: 12 men and 55 women with mean age 68.8±14.5 years old were included. Mean Body Mass Index (BMI) was 27.4±4.1kg/m2. 42% of patients showed hypercalciuria, 34% hyperoxaluria, 34% hypocitraturia and 7% hyperuricosuria. Statistically significant differences were observed only in fasting calcium/creatinine ratio (0.17 vs. 0.08; P<.0001) when comparing patients with hypercalciuria with those with normocalciuria.

Conclusions: Patients with osteoporotic fractures show different lithogenic factors in urine, mainly hypercalciuria, always in fasting conditions.

Keywords: Factores litogénicos; Fasting hypercalciuria; Fractura osteoporótica; Hipercalciuria de ayunas; Lithogenic factors; Osteoporosis; Osteoporotic fracture.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Alkaline Phosphatase / urine
  • Calcium / metabolism*
  • Citric Acid / urine
  • Fasting / urine
  • Female
  • Humans
  • Hypercalciuria / etiology*
  • Male
  • Middle Aged
  • Osteoporosis / complications
  • Osteoporosis / metabolism*
  • Osteoporotic Fractures / etiology
  • Osteoporotic Fractures / surgery
  • Osteoporotic Fractures / urine*
  • Parathyroid Hormone / urine
  • Phosphorus / metabolism*
  • Risk Factors
  • Uric Acid / urine
  • Urolithiasis / etiology*
  • Vitamin D / analogs & derivatives
  • Vitamin D / urine

Substances

  • Parathyroid Hormone
  • Vitamin D
  • Uric Acid
  • Phosphorus
  • Citric Acid
  • 25-hydroxyvitamin D
  • Alkaline Phosphatase
  • Calcium