title: Near-infrared spectroscopy for assessment of tissue oxygen saturation of transplanted jejunal autografts in cervical esophageal reconstruction.
abstract: OBJECTIVE
  Checking bowel viability is difficult but important during surgery for ischemic bowel disease or jejunal autotransplantation. We investigated the effectiveness of two-wavelength near-infrared spectroscopy (NIRS) to quantify tissue oxygen saturation (StO(2)), which can affect bowel viability during reconstruction of the cervical esophagus using a free jejunal graft.
  
  
  METHODS
  Free jejunal autotransplantation was performed after resection of the hypopharynx, larynx, and cervical esophagus in 12 pigs. The arterial blood flow and StO(2) of the graft were measured before harvesting the graft and after reperfusion. We analyzed the measurement site of the graft and the anastomotic method as possible factors influencing StO(2). We also examined the relationship between the blood flow and StO(2) of the autograft.
  
  
  RESULTS
  The StO(2) at the distal site of the graft was significantly lower than that at the midpoint of the graft (P < 0.05). There was a correlation between the blood flow of the graft artery, measured by the transonic volume flowmeter, and the StO(2) of the graft, measured by NIRS.
  
  
  CONCLUSIONS
  Tissue oxygen saturation of the free jejunal graft can be safely and reliably measured with two-wavelength NIRS. Therefore, NIRS is a promising new method for evaluating the viability of the gastrointestinal tract.
authors.affiliation: Department of General and Cardiothoracic Surgery, Kanazawa University Faculty of Medicine, School of Medicine, Kanazawa, Japan.
authors.forename: Yasumitsu
authors.initials: Y
authors.lastname: Hirano
authors.forename: Kenji
authors.initials: K
authors.lastname: Omura
authors.forename: Hidemaro
authors.initials: H
authors.lastname: Yoshiba
authors.forename: Naohiro
authors.initials: N
authors.lastname: Ohta
authors.forename: Chikashi
authors.initials: C
authors.lastname: Hiranuma
authors.forename: Kanae
authors.initials: K
authors.lastname: Nitta
authors.forename: Yuji
authors.initials: Y
authors.lastname: Nishida
authors.forename: Go
authors.initials: G
authors.lastname: Watanabe
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D016629:Esophagectomy / Q000009:adverse effects / Q000379:methods; D005260:Female; D006439:Hemodynamics / Q000502:physiology; D007583:Jejunum / Q000098:blood supply* / Q000637:transplantation*; D010101:Oxygen Consumption / Q000502:physiology*; D011182:Postoperative Care / Q000379:methods; D011336:Probability; D019651:Plastic Surgery Procedures / Q000379:methods*; D012044:Regression Analysis; D012680:Sensitivity and Specificity; D019265:Spectroscopy, Near-Infrared; D013552:Swine; D014182:Transplantation, Autologous