1. Improved pain control after cardiac surgery: results of a randomized, double-blind, clinical trial 
Robert Dowling, MD, Kenneth Thielmeier, MD, Aziz Ghaly, MD, Deborah Barber, CRNA, Todd Boice, CFA, Alan Dine, BSN 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 126, Issue 5, Pages (November 2003)
DOI: /S (03)

2. Figure 1
Intraoperative placement of the pressurized elastomeric pump and catheters.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /S (03) )

3. Figure 2
Participant flow during the study. PCA, Patient-controlled analgesia.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /S (03) )

4. Figure 3
Predicting mean postoperative pain for morphine levels in groups.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /S (03) )