title: Continuous surveillance of lower limb perfusion during aortic surgery with near-infrared spectroscopy: a pilot study.
abstract: BACKGROUND
  Near-infrared spectroscopy (NIRS) is a noninvasive technique that allows continuous monitoring of the regional hemoglobin oxygen saturation (rSO(2)) index. We evaluated its application to survey perioperative lower limb perfusion.
  
  
  METHODS
  A total of 10 patients (7 men, aged 71) were monitored during abdominal surgery for aortic aneurysms. The rSO(2) index was measured at the M gastrocnemius (optode 1) and at the dorsum of the foot (optode 2).
  
  
  RESULTS
  Mean baseline rSO(2) values for optodes 1 and 2 were 67 and 66, respectively. After clamping the aorta or iliacofemoral arteries, rSO(2) dropped to 32 for optode 1 (P<.0001) and to 27 for optode 2 (P<.0001). After declamping, rSO(2) increased to 74 for optode 1 (P=.0012 vs baseline) and also to 74 for optode 2 (P=.0018 vs baseline).
  
  
  CONCLUSIONS
  Near-infrared spectroscopy is an easily applicable, noninvasive tool for continuous surveillance of lower extremity perfusion during aortic reconstruction.
authors.affiliation: Department of Vascular Surgery, St. Antonius Hospital, Nieuwegein, The Netherlands. r.boezeman@antoniusziekenhuis.nl
authors.forename: R P E
authors.initials: RP
authors.lastname: Boezeman
authors.forename: J C
authors.initials: JC
authors.lastname: Kelder
authors.forename: F G J
authors.initials: FG
authors.lastname: Waanders
authors.forename: J P P M
authors.initials: JP
authors.lastname: de Vries
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000601:surgery*; D015415:Biomarkers / Q000097:blood; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007511:Ischemia / Q000097:blood / Q000175:diagnosis* / Q000503:physiopathology; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D009426:Netherlands; D010092:Oximetry; D010100:Oxygen / Q000097:blood*; D010865:Pilot Projects; D011237:Predictive Value of Tests; D012039:Regional Blood Flow; D019265:Spectroscopy, Near-Infrared; D014656:Vascular Surgical Procedures / Q000009:adverse effects
chemical_list: D015415:Biomarkers; D010100:Oxygen