fa تاثیر فشردن قفسه‌ی سینه در زمان بازدم قبل از ساکشن داخل تراشه بر اکسیژناسیون خون شریانی بیماران تحت تهویه مکانیکی کارآزمایی بالینی Clinical Trials <p>Background and Objective: Hypoxia is a major problem in patients undergoing ventilation due to the high bronchioles secretion. This study aimed to determine the effect of expiratory rib-cage compression prior to endotracheal suctioning on arterial blood oxygenation (SpO2) in patients undergoing mechanical ventilation. Materials and Methods: This clinical trial with a crossover design included 50 mechanically ventilated patients hospitalized in the intensive care units of two educational hospitals (Vali-e-Asr and Ayatollah Mousavi) of Zanjan using the convenience sampling method. The participants were randomly divided into two groups. During the first phase of the study, the rib-cage compression was performed once for five minutes prior to suctioning in group one. The other group received suctioning without any rib-cage compression. The procedures were performed in a reverse fashion in the two groups after three hours. SpO2 was measured three times: five minutes prior to the endotracheal suctioning, and 15 and 25 minutes following the procedure. Data were analyzed using independent and paired t-tests. Results: There were statistically significant differences in the SpO2 mean values between five minutes before and 15 minutes after the endotracheal suctioning in patients who received endotracheal suctioning with the rib-cage compression (P< 0.05). Moreover, there was a statistically significant difference between the mean SpO2 values in the same intervals between the two groups (P< 0.0001). Conclusion: The results show that expiratory rib-cage compression prior to endotracheal suctioning improves arterial blood oxygenation in patients undergoing mechanical ventilation. Therefore, we recommend performing the procedure.</p> Keyword: Mechanical ventilation, Endotracheal suctioning, Expiratory rib cage compression, Vital signs 9 17 http://journal.zums.ac.ir/browse.php?a_code=A-10-4-649&slc_lang=fa&sid=1 Yadollah Shirvani یداله شیروانی 5200319475328460059787 5200319475328460059787 No School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran. Mitra Payami Bousari میترا پیامی بوساری Payami@zums. ac.ir 5200319475328460059788 5200319475328460059788 Yes School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran. Saeed Agha Hasan Kashani سعید آقا حسن کاشانی 5200319475328460059789 5200319475328460059789 No Dept. of Internal Medicine, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Seyed Noraddin Mosavi Nasab سید نورالدین موسوی نسب 5200319475328460059790 5200319475328460059790 No Dept. of Statistics, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran