title: Measurement of hypoxia-related parameters in bronchial mucosa by use of optical spectroscopy.
abstract: BACKGROUND
  Tumor hypoxia has both prognostic and therapeutic consequences for solid tumors. We developed a novel noninvasive technique, differential path-length spectroscopy (DPS), which allows the measurement of hypoxia-related parameters in the superficial microvasculature of tissue.
  
  
  OBJECTIVE
  The aim of this study was to measure the microvascular oxygenation of histologically normal endobronchial mucosa and of neoplastic lesions during bronchoscopy using DPS.
  
  
  METHODS
  Sixty-four patients with known or suspected malignancies of the lung were studied. One hundred and five endobronchial lesions (38 histologically normal, 37 metaplastic/mild dysplastic lesions, and 30 invasive carcinomas) were detected by white and/or autofluorescence bronchoscopy and measured using DPS.
  
  
  RESULTS
  We observed that bronchial tumors are characterized by a lower blood oxygen saturation and a higher blood content than normal mucosa. No differences were observed between normal and metaplastic/mild dysplastic mucosa.
  
  
  CONCLUSIONS
  DPS is a new optical technique allowing the noninvasive study of endobronchial tumor hypoxia.
authors.affiliation: Department of Respiratory Diseases, Center for Optical Diagnostics and Therapy, Rotterdam, Netherlands.
authors.forename: Martin P L
authors.initials: MP
authors.lastname: Bard
authors.forename: Arjen
authors.initials: A
authors.lastname: Amelink
authors.forename: Vincent Noordhoek
authors.initials: VN
authors.lastname: Hegt
authors.forename: Wilfried J
authors.initials: WJ
authors.lastname: Graveland
authors.forename: Henricus J C M
authors.initials: HJ
authors.lastname: Sterenborg
authors.forename: Henk C
authors.initials: HC
authors.lastname: Hoogsteden
authors.forename: Joachim G J V
authors.initials: JG
authors.lastname: Aerts
mesh_terms: D000368:Aged; D001984:Bronchial Neoplasms / Q000098:blood supply / Q000150:complications / Q000378:metabolism* / Q000473:pathology; D001999:Bronchoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000209:etiology / Q000378:metabolism* / Q000473:pathology; D008297:Male; D010100:Oxygen / Q000378:metabolism*; D020545:Respiratory Mucosa / Q000098:blood supply / Q000378:metabolism* / Q000473:pathology; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D010100:Oxygen