Mechanical Ventilation in Patients with Hypoxemia due to Refractory Heart Failure
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概要
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Objective The goal of this study was to evaluate the safety and efficacy of mechanical ventilation (MV), including noninvasive positive pressure ventilation (NPPV) and endotracheal intubation (ETI) in patients with very severe hypoxemia due to refractory heart failure (RHF). Methods In addition to conventional treatment, eighteen patients with hypoxemia due to RHF were assigned to receive NPPV (n=10) or ETI (n=8) based on the severity of their clinical status. Arterial blood gas, PaO2/FiO2, vital signs including respiratory rate (RR), heart rate (HR) and systolic blood pressure (SBP), left ventricular ejection fraction (LVEF) and left ventricular end-diastolic volume (LVEDV) were recorded before and after MV in each group. Results The patients in the ETI group showed more severe hypoxemia and respiratory acidosis in comparison with the patients in the NPPV group. Both the NPPV and ETI significantly increased PaO2, PaO2/FiO2 and arterial oxygen saturation (SaO2) (p <0.01) and reduced RR and HR (p <0.01) after MV in comparison to that before MV. Both the NPPV and ETI significantly increased LVEF (p <0.05) and decreased LVEDV (p <0.01) at the time of weaning from MV in comparison to that before MV. Moreover, PaO2 correlated with LVEF (r=0.882, p=0.01 and r=0.736, p=0.037) while it also inversely correlated with LVEDV (r=-0.645, p=0.044 and r=-0.756, p=0.030) at the time of weaning from MV in the NPPV and ETI groups, respectively. There were two failed cases in the NPPV group. They were transferred immediately to be treated with ETI and were equivalent to the others in the ETI group. Conclusion Both NPPV and ETI are safe and effective modalities for improving hypoxemia and left heart function in patients with RHF. These results suggest that invasive MV should be applied to very severe patients with RHF as quickly as possible when an expected clinical improvement cannot be obtained by NPPV.
- 社団法人 日本内科学会の論文
著者
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Hanaoka Masayuki
The First Department of Internal Medicine, Shinshu University School of Medicine
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Kubo Keishi
The First Department Of Internal Medicine Shinshu University
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Kubo Keishi
The First Department of Medicine, Shinshu University School of Medicine
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Droma Yunden
The First Department of Medicine, Shinshu University School of Medicine
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Chen Yan
Division of Respiratory Disease, Department of Internal Medicine, The Second Xiangya Hospital, Central-South University
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Chen Ping
Division of Respiratory Disease, Department of Internal Medicine, The Second Xiangya Hospital, Central-South University
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Huang Xingang
Division of Respiratory Disease, Department of Internal Medicine, The Second Xiangya Hospital, Central-South University
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