title: Venous strain-gauge plethysmography--reference values.
abstract: OBJECTIVE
  To establish sex and age related reference values for venous strain-gauge plethysmography.
  
  
  METHODS
  Strain-gauge plethysmography measurements in healthy volunteers.
  
  
  METHODS
  Examinations performed in a University Hospital (Malmö) and a County Hospital (Kalmar).
  
  
  METHODS
  Healthy volunteers, without history or signs of venous insufficiency. Twenty-seven men, 31 women, age range 15-74 years.
  
  
  METHODS
  Refilled volume (RV;ml/100 ml tissue), half refilling time (T50;sec), and refilling time to 90% of RV (T90;sec).
  
  
  RESULTS
  RV; lower limit 0.6 ml/100 ml tissue. T50; lower limit 3.3 sec T90; lower limit age dependent and calculated from the ekvation: In (T90) = 3.864-0.0111 age-0.337, where in is the natural logarithm. Methodological error: RV (15%), T50 (28%), T90 (23%).
  
  
  CONCLUSIONS
  Strain-gauge plethysmography can be used to evaluate venous insufficiency and could be especially useful in follow-up studies after therapy. Normal age and sex related reference values are needed. In this study reference values are established. Preferably RV and T90 should be used.
authors.affiliation: Department of Vascular and Renal Diseases, Malmö University Hospital, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Akesson
authors.forename: L
authors.initials: L
authors.lastname: Brudin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010991:Plethysmography; D012016:Reference Values; D014689:Venous Insufficiency / Q000175:diagnosis