1. Palmar Microcirculation After Harvesting of the Radial Artery in Coronary Revascularization 
Karsten Knobloch, MD, Artur Lichtenberg, MD, Max Pichlmaier, MD, Sandra Tomaszek, MD, Alfons Krug, MD, Axel Haverich, MD, PhD 
The Annals of Thoracic Surgery 
Volume 79, Issue 3, Pages (March 2005)
DOI: /j.athoracsur

2. Fig 1
Box plot of the decrease (%) of tissue oxygen saturation (SO2 %) after radial compression before radial artery harvesting. (D1, D3, and D5 = the fingertips of digits 1, 3, and 5, respectively).
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

3. Fig 2
Box plot of the decrease (%) of tissue oxygen saturation (SO2 %) after ulnar compression before radial artery harvesting. (D1, D3, and D5 = the fingertips of digits 1, 3, and 5, respectively).
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

4. Fig 3 O2C system of LEA Medizintechnik, Giessen, Germany.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )