title: Intraarterial injection of indocyanine green for evaluation of peripheral blood circulation in patients with peripheral arterial disease.
abstract: BACKGROUND
  To assess the peripheral blood flow of patients with peripheral arterial disease (PAD) by indocyanine green (ICG) arteriography (ICGA) with intraarterial injection of ICG and evaluate the efficacy of the ICGA tests.
  
  
  METHODS
  This study was undertaken from a retrospective review of patients with PAD who underwent ICGA tests during digital subtraction angiography (DSA) between November 2012 and June 2013. We defined some ICGA parameters as the magnitude of intensity of ICG, the time to maximum intensity, and the time from fluorescence onset to half the maximum intensity (T1/2). The ICGA parameters were evaluated in 2 regions, named regions of interest (ROIs). ROI 1 was part of the dorsum of the foot from the Chopart joint to the Lisfranc joint. ROI 2 was in the distal region of the first metatarsal bone and compared with the ankle-brachial pressure index (ABI), ankle pressure, toe-brachial pressure index, and toe pressure.
  
  
  RESULTS
  A total of 22 limbs in 16 patients with PAD underwent ICGA tests during DSA. The T1/2 on ROI 2 was the most correlated with the ABI (ρ=-0.622, P=0.003). A value of T1/2 for ROI 2>10 sec was significantly correlated with an ABI value of <0.7 (sensitivity: 0.85, specificity: 1.0).
  
  
  CONCLUSIONS
  By measuring the value of T1/2 in ROI 2, ICGA tests can be performed to assess the peripheral blood circulation during DSA. ICGA tests might help to promptly assess the peripheral blood flow during endovascular treatment procedures.
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: igari.srg1@tmd.ac.jp.
authors.forename: Kimihiro
authors.initials: K
authors.lastname: Igari
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Kudo
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Uchiyama
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Toyofuku
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Inoue
mesh_terms: D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods*; D004396:Coloring Agents / Q000008:administration & dosage; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007208:Indocyanine Green / Q000008:administration & dosage*; D007269:Injections, Intra-Arterial; D007866:Leg / Q000098:blood supply*; D008297:Male; D058729:Peripheral Arterial Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011237:Predictive Value of Tests; D012039:Regional Blood Flow / Q000502:physiology*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012720:Severity of Illness Index
chemical_list: D004396:Coloring Agents; D007208:Indocyanine Green