1. Forty-Five–Degree Two-Stage Venous Cannula: Advantages Over Standard Two-Stage Venous Cannulation 
David R Lawrence, FRCS, Jatin B Desai, FRCS(CTh) 
The Annals of Thoracic Surgery 
Volume 63, Issue 1, Pages (January 1997)
DOI: /S (96)

2. Fig. 1 The 45-degree two-stage cannula.
The Annals of Thoracic Surgery  , DOI: ( /S (96) )

3. Fig. 2 Saggital view of the cannula in place.
The Annals of Thoracic Surgery  , DOI: ( /S (96) )

4. Fig. 3 The cannula ready for use.
The Annals of Thoracic Surgery  , DOI: ( /S (96) )