title: Serum electrolyte changes at engraftment time in patients undergoing allogeneichematopoietic stem cell transplantation.
abstract: BACKGROUND
  Metabolic abnormalities have been reported in patients undergoing hematopoietic stem cell transplantation (HSCT). Potential causes, risk factors and outcomes of electrolyte imbalances have thoroughly been investigated. On HSCT recipients, multiple pathophysiologic contributors are inflicting electrolyte abnormalities, with special attention being paid to engraftment per se as an important contributor. Engraftment contribution to electrolyte imbalances has been reported for hypophosphatemia and for other electrolyte abnormalities in autologous setting. However in the allogeneic setting serum electrolyte level changes and the timing of any probable abnormality are unknown.
  
  
  METHODS
  We performed a retrospective study in order to evaluate the pattern of phosphorous, magnesium, potassium and uric acid serum changes, timing of any probable abnormality and their possible association with WBC and platelet engraftment in 65 allogeneic HCT recipients from day -9 to +32 after transplantation. Besides we assessed frequency and severity of the abnormalities.
  
  
  RESULTS
  We observed a declining pattern of electrolyte concentrations with nadirs antedating WBC and platelet engrafments. Phosphorous and potassium serum changes were correlated with natural logarithm of WBC and platelet level changes. Observed overall incidence of hypophosphatemia (9.2%) and hypomagnesemia (3%) was lower than those previously reported.
  
  
  CONCLUSIONS
  Abnormalities found reflect a combination of pathophysiologic mechanisms. Occurrence of electrolyte nadirs antedating engraftment confirms increased consumption by rapidly replicating cells as a contributor in allogeneic setting and specifies a susceptible period requiring intensive monitoring. Considering high risk patients and managing various organ system complications lower incidence of some electrolyte abnormalities may be observed.
authors: Department of Clinical Pharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
authors: Toktam
authors: T
authors: Faghihi
authors: Masoud
authors: M
authors: Iravani
authors: Ahmad Reza
authors: AR
authors: Shamshiri
authors: Molouk
authors: M
authors: Hadjibabaie
authors: Seyyed Asadolah
authors: SA
authors: Mousavi
authors: Kamran
authors: K
authors: Alimoghaddam
authors: Ardeshir
authors: A
authors: Ghavamzadeh
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004573:Electrolytes / Q000097:blood*; D005260:Female; D006085:Graft Survival; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D006801:Humans; D007958:Leukocyte Count; D008274:Magnesium / Q000097:blood; D008297:Male; D008875:Middle Aged; D010758:Phosphorus / Q000097:blood; D010976:Platelet Count; D011188:Potassium / Q000097:blood; D012189:Retrospective Studies; D013997:Time Factors; D014184:Transplantation, Homologous; D014527:Uric Acid / Q000097:blood; D014883:Water-Electrolyte Imbalance / Q000097:blood / Q000209:etiology; D055815:Young Adult
chemical_list: D004573:Electrolytes; D014527:Uric Acid; D010758:Phosphorus; D008274:Magnesium; D011188:Potassium