title: The influence of 2 surgical bandage systems on wound tissue oxygen tension.
abstract: OBJECTIVE
  Local wound heating improves tissue oxygen tension in postoperative patients.
  
  
  METHODS
  University hospital.
  
  
  METHODS
  Forty normothermic and well-hydrated patients recovering from elective open abdominal surgery.
  
  
  METHODS
  A comparison between an experimental bandage system (Warm-Up; Augustine Medical Inc, Eden Prairie, Minn) and conventional gauze covered with elastic adhesive (Medipore Dress-it; 3M, St Paul, Minn). The experimental system is heated to 38 degrees C and does not touch the wound.
  
  
  METHODS
  Subcutaneous tissue oxygen tension was measured postoperatively and on the first postoperative day. In a subgroup, we also evaluated the effects of bandage pressure per se on tissue oxygen.
  
  
  RESULTS
  Initial postoperative tissue oxygen tensions were approximately 30 mm Hg greater with the experimental bandage, even before warming. Subcutaneous oxygen tension during heating remained significantly greater in patients with the warmed bandage than the conventional elastic bandage (116 +/- 40 vs 85 +/- 34 mm Hg, respectively) while the patients were breathing approximately 50% oxygen. The difference was smaller on the first postoperative day, but still statistically significant (82 +/- 30 vs 65 +/- 22 mm Hg, respectively). In the subgroup analysis, tissue oxygen tension increased significantly by 12 +/- 4 mm Hg when the heating bandage was substituted for a conventional bandage (P<.001).
  
  
  CONCLUSIONS
  In normothermic and well-hydrated surgical patients, much benefit from the heating bandage system appears to result from pressure relief. These data suggest that relieving wound pressure markedly improves tissue perfusion and oxygenation.
authors.affiliation: Department of Anesthesiology and General Intensive Care, University of Vienna, Austria.
authors.forename: O
authors.initials: O
authors.lastname: Plattner
authors.forename: O
authors.initials: O
authors.lastname: Akca
authors.forename: F
authors.initials: F
authors.lastname: Herbst
authors.forename: C F
authors.initials: CF
authors.lastname: Arkilic
authors.forename: R
authors.initials: R
authors.lastname: Függer
authors.forename: M
authors.initials: M
authors.lastname: Barlan
authors.forename: A
authors.initials: A
authors.lastname: Kurz
authors.forename: H
authors.initials: H
authors.lastname: Hopf
authors.forename: A
authors.initials: A
authors.lastname: Werba
authors.forename: D I
authors.initials: DI
authors.lastname: Sessler
mesh_terms: D000005:Abdomen / Q000601:surgery; D000328:Adult; D000368:Aged; D001458:Bandages / Q000706:statistics & numerical data; D005260:Female; D006358:Hot Temperature / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D011182:Postoperative Care; D011312:Pressure; D012867:Skin / Q000378:metabolism*; D012881:Skin Temperature; D014945:Wound Healing / Q000502:physiology*