title: Comparative diagnostic value of ankle-to-brachial index and transcutaneous oxygen tension at rest and after exercise in patients with intermittent claudication.
abstract: BACKGROUND
  Few studies have compared sensitivities of ankle-to-brachial index (ABI) and transcutaneous oxygen tension (TcPO2) in a large group of patients with Leriche stage II intermittent claudication.
  
  
  RESULTS
  111 patients (138 limbs) with a stable chronic (> three months) intermittent claudication and significant peripheral vascular disease (PVD) proved by angiography were studied. They performed a treadmill test (10%, 3 km/hr) limited by limb pain. ABI and TcPO2 were measured before, just after exercise, and after three and ten minutes of recovery in supine position. Sensitivities per patient for ABI and TcPO2 were respectively at rest: 82.9% and 28.8%, and after exercise: 88.3% and 62.2%. Sensitivities per leg (n = 138) for ABI and TcPO2 were respectively at rest: 73.9% and 26.8%, and after exercise: 82.6% and 34%. The sensitivity of TcPO2 increased to 56.5% after three minutes of recovery but was always less than that of ABI, which was maximal just after exercise (82.6%). The sensitivity of the regional perfusion index was similar to that of TcPO2. The sensitivity of TcPO2 increased with respect to the Leriche stage and the number of lesions but was always lower than that of ABI. There was a weak correlation between TcPO2 and ABI after exercise, but no correlation was noted between maximal walking distance, ABI, and TcPO2.
  
  
  CONCLUSIONS
  TcPO2 is not required in patients with Leriche stage II intermittent claudication but might be useful either in severely affected patients (Leriche stage III or IV) or in selected patients.
authors.affiliation: Department of Cardiology C, Cardiology Hospital, University of Lille, France.
authors.forename: P
authors.initials: P
authors.lastname: de Groote
authors.forename: A
authors.initials: A
authors.lastname: Millaire
authors.forename: G
authors.initials: G
authors.lastname: Deklunder
authors.forename: P
authors.initials: P
authors.lastname: Marache
authors.forename: E
authors.initials: E
authors.lastname: Decoulx
authors.forename: G
authors.initials: G
authors.lastname: Ducloux
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D000842:Ankle; D001785:Blood Gas Monitoring, Transcutaneous / Q000706:statistics & numerical data; D001794:Blood Pressure; D001916:Brachial Artery; D002908:Chronic Disease; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D007383:Intermittent Claudication / Q000097:blood / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood*; D012146:Rest / Q000502:physiology*; D012680:Sensitivity and Specificity
chemical_list: D010100:Oxygen