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  • Title: Stacked inspiratory spirometry reduces pulmonary shunt in patients after coronary artery bypass.
    Author: Strider D, Turner D, Egloff MB, Burns SM, Truwit JD.
    Journal: Chest; 1994 Aug; 106(2):391-5. PubMed ID: 7774308.
    Abstract:
    Atelectasis is a major factor in postoperative morbidity for patients undergoing cardiopulmonary surgery. We evaluated the effectiveness of stacked inspiratory spirometry (STIS) in 17 patients status postcoronary artery bypass graft in a nonrandomized fashion. We measured pulmonary shunt as an endpoint, and compared the magnitudes before and after the STIS maneuver. Our results showed an 8.66 percent reduction in pulmonary shunt (p < 0.05). The reduction in shunt was modest; however, repetitive maneuvers might result in greater improvement.
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