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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| NEXAP group | Experimental | The ventilator mode was changed from SIMV to PSV before LRM. After that, the abdominal pressure cardiopulmonary resuscitation (CPR-LW100) instrument was adopted and adsorbed on the epigastrium of patients. The LRM was performed by pulling up (tension of 20-30 kg) and compressing downward (tension<10 kg) alternately on the abdomen of the patients with a frequency of 12 times per minute to support and maintain breathing. The whole LRM procedure lasted for 3 minutes in total . After LRM, the ventilator mode was changed to its baseline settings. |
|
| PEEP group | Active Comparator | The ventilator mode was changed from SIMV to PSV before LRM. After that, PEEP was increased gradually (every 3-5cmH2O per 30s) from baseline (5-8 cmH2O) to 20cmH2O. The PEEP level was maintained at 20cmH2O for 60s, followed by decrements to baseline PEEP (every 3-5cmH2O per 30s). After LRM, the ventilator was changed to the baseline settings. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Negative extra-abdominal pressure (NEXAP)-based lung recruitment maneuver | Device | The ventilator mode was changed from SIMV to PSV before LRM. After that, the abdominal pressure cardiopulmonary resuscitation (CPR-LW100) instrument was adopted and adsorbed on the epigastrium of patients. The LRM was performed by pulling up (tension of 20-30 kg) and compressing downward (tension<10 kg) alternately on the abdomen of the patients with a frequency of 12 times per minute to support and maintain breathing. The whole LRM procedure lasted for 3 minutes in total. After LRM, the ventilator mode was changed to its baseline settings. |
| Measure | Description | Time Frame |
|---|---|---|
| Lung ultrasound score (LUSS) | The thorax was divided by the anterior axillary line, the posterior axillary line, and a horizontal line beneath the nipple. The intercostal spaces of each of the 12 areas were scanned and analyzed . Aeration loss was assessed by calculating the modified lung ultrasound score (LUSS), which showed sufficient sensitivity to detect aeration loss. Two lung ultrasound examiners provided scores for each area after simultaneous examination of the lung scan. LUSS was then calculated globally (LUSStot， as the sum of the 12 regions score, ranging from 0 to 36), and regionally (LUSSp, posterior, LUSSa, anterior and LUSSl, lateral regions). | 5 min before treatment and 5 min after treatment |
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Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Jilai Xiao | Nanjing First Hospital, Nanjing Medical University | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Nanjing First Hospital | Nanjing | Nanjing | 210000 | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 25604600 | Background | Ubben JF, Lance MD, Buhre WF, Schreiber JU. Clinical strategies to prevent pulmonary complications in cardiac surgery: an overview. J Cardiothorac Vasc Anesth. 2015 Apr;29(2):481-90. doi: 10.1053/j.jvca.2014.09.020. Epub 2015 Jan 17. No abstract available. | |
| 35377472 | Background | Keogh C, Saavedra F, Dubo S, Aqueveque P, Ortega P, Gomez B, Germany E, Pinto D, Osorio R, Pastene F, Poulton A, Jarvis J, Andrews B, FitzGerald JJ. Non-invasive phrenic nerve stimulation to avoid ventilator-induced diaphragm dysfunction in critical care. Artif Organs. 2022 Oct;46(10):1988-1997. doi: 10.1111/aor.14244. Epub 2022 Apr 12. |
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|
| stepwise positive end-expiratory pressure (PEEP)-based lung recruitment maneuver | Other | The ventilator mode was changed from SIMV to PSV before LRM. After that, PEEP was increased gradually (every 3-5cmH2O per 30s) from baseline (5-8 cmH2O) to 20cmH2O. The PEEP level was maintained at 20cmH2O for 60s, followed by decrements to baseline PEEP (every 3-5cmH2O per 30s). After LRM, the ventilator was changed to the baseline settings. |
|
| 32653270 | Background | Bruni A, Garofalo E, Pasin L, Serraino GF, Cammarota G, Longhini F, Landoni G, Lembo R, Mastroroberto P, Navalesi P; MaGIC (Magna Graecia Intensive care and Cardiac surgery) Group. Diaphragmatic Dysfunction After Elective Cardiac Surgery: A Prospective Observational Study. J Cardiothorac Vasc Anesth. 2020 Dec;34(12):3336-3344. doi: 10.1053/j.jvca.2020.06.038. Epub 2020 Jun 17. |
| 28331959 | Background | Gattinoni L, Tonetti T, Quintel M. Intensive care medicine in 2050: ventilator-induced lung injury. Intensive Care Med. 2018 Jan;44(1):76-78. doi: 10.1007/s00134-017-4770-8. Epub 2017 Mar 22. No abstract available. |
| 16096751 | Background | Nielsen J, Ostergaard M, Kjaergaard J, Tingleff J, Berthelsen PG, Nygard E, Larsson A. Lung recruitment maneuver depresses central hemodynamics in patients following cardiac surgery. Intensive Care Med. 2005 Sep;31(9):1189-94. doi: 10.1007/s00134-005-2732-z. Epub 2005 Aug 12. |
| 33336263 | Background | Scharffenberg M, Wittenstein J, Herzog M, Tauer S, Vivona L, Theilen R, Bluth T, Kiss T, Koch T, Fiorentino G, de Abreu MG, Huhle R. Continuous external negative pressure improves oxygenation and respiratory mechanics in Experimental Lung Injury in Pigs - A pilot proof-of-concept trial. Intensive Care Med Exp. 2020 Dec 18;8(Suppl 1):49. doi: 10.1186/s40635-020-00315-1. |
| 29596015 | Background | Yoshida T, Engelberts D, Otulakowski G, Katira B, Ferguson ND, Brochard L, Amato MBP, Kavanagh BP. Continuous negative abdominal pressure: mechanism of action and comparison with prone position. J Appl Physiol (1985). 2018 Jul 1;125(1):107-116. doi: 10.1152/japplphysiol.01125.2017. Epub 2018 Mar 29. |
| 34110233 | Background | Rohrs EC, Bassi TG, Fernandez KC, Ornowska M, Nicholas M, Wittmann JC, Reynolds SC. Diaphragm neurostimulation during mechanical ventilation reduces atelectasis and transpulmonary plateau pressure, preserving lung homogeneity and P a O 2 / F I O 2 . J Appl Physiol (1985). 2021 Jul 1;131(1):290-301. doi: 10.1152/japplphysiol.00119.2021. Epub 2021 Jun 10. |
| ID | Term |
|---|---|
| D001261 | Pulmonary Atelectasis |
| ID | Term |
|---|---|
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |
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