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The superiority of pulmonary function after minimally invasive direct coronary artery bypass
Akihiko Ohkado1, Kiyoharu Nakano, Hayao Nakatani
1Department of Cardiovascular Surgery, Sendai Cardiovascular Center, 21-1 Hondamachi, Izumi-ku, Sendai 981-3107, Japan.
Objective:
We determined whether minimally invasive direct coronary artery bypass (MIDCAB) leads to excellent postoperative pulmonary function, and which contributes more to this--minithoracotomy or avoidance of cardiopulmonary bypass.
Methods:
Pulmonary function 1 week before and 2 weeks after surgery was evaluated in 8 patients undergoing MIDCAB (Group M), 10 undergoing off-pump coronary artery bypass (Group O), and 12 undergoing conventional coronary artery bypass grafting (Group C). Parameters were adjusted by their predicted values and postoperative values were expressed as a ratio to preoperative ones.
Results:
Only Group M maintained postoperative vital capacity and forced expiratory volume in 1 second close to the preoperative level and thus, showed significantly better recovery than Groups O and C. No significant difference was seen between Groups O and C.
Conclusions:
MIDCAB provides better recovery of pulmonary function early postoperatively than other procedures thanks to minithoracotomy rather than avoidance of cardiopulmonary bypass.