title: Effect of peritoneal fluid on whole body and segmental multiple frequency bioelectrical impedance in patients on peritoneal dialysis.
abstract: OBJECTIVE
  We investigated the ability of whole body and segmental multiple frequency bioelectrical impedance (MFBIA) to detect peritoneal fluid in peritoneal dialysis patients.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Teaching hospital renal unit.
  
  
  METHODS
  Patients on regular peritoneal dialysis.
  
  
  METHODS
  Whole body and segmental MFBIA measurements before and after drainage of peritoneal fluid.
  
  
  RESULTS
  Changes estimated by MFBIA in total body water (-0.4 (0.8) litres) and extracellular water (-0.3 (0.3) litres) were much lower than the actual changes (2.0 (0.4) litres), P<0.0001. Derived resistances Recf and Ricf increased significantly for the trunk but not for total body measurements and changes did not correlate with volumes of fluid drained.
  
  
  CONCLUSIONS
  MFBIA is limited in its ability to detect intraperitoneal fluid, using both whole body and segmental techniques.
authors.affiliation: Renal Unit, Leeds General Infirmary, Leeds, United Kingdom.
authors.forename: N
authors.initials: N
authors.lastname: Than
authors.forename: G
authors.initials: G
authors.lastname: Woodrow
authors.forename: B
authors.initials: B
authors.lastname: Oldroyd
authors.forename: C
authors.initials: C
authors.lastname: Gonzalez
authors.forename: J H
authors.initials: JH
authors.lastname: Turney
authors.forename: A M
authors.initials: AM
authors.lastname: Brownjohn
mesh_terms: D000328:Adult; D000368:Aged; D001202:Ascitic Fluid; D001823:Body Composition; D001834:Body Water; D017097:Electric Impedance; D005110:Extracellular Space; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010530:Peritoneal Dialysis