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Anesthesia-induced atelectasis persist in the postoperative period but are not usually diagnosed because imaging techniques are required. The aim of the study is to determine whether the value of SpO2≤96 while breathing room air (0.21 FiO2) for 5 min, maneuver that we defined as the Air Test, was able to diagnose atelectasis in the postoperative period after a general anesthesia.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Air Test | Procedure | The Air Test simply consisted in breathing room air for 5 min on arrival into the postoperative anesthesia care unit while measuring peripheral oxygen saturation by Pulse oximetry |
| Measure | Description | Time Frame |
|---|---|---|
| Presence of postoperative atelectasis meassured by SpO2 levels and confirmed by computed tomography. | After arrival to the post-surgery unit, patients received supplemental oxygen through a venturi mask with flow adjusted to approximate a FiO2 of 0.5 during the first 30 minutes. The SpO2 measure was made removing the oxygen mask and leaving the patients to breath room air for at least for 5 minutes. | 35 minutes post-surgery |
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Inclusion Criteria:
Exclusion Criteria:
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The study included all patients with ASA status I-III scheduled for elective surgery.
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Anesthesia and Critical Care; Hospital Clinico Universitario | Valencia | Valencia | 46010 | Spain |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 23385321 | Background | Hemmes SN, Serpa Neto A, Schultz MJ. Intraoperative ventilatory strategies to prevent postoperative pulmonary complications: a meta-analysis. Curr Opin Anaesthesiol. 2013 Apr;26(2):126-33. doi: 10.1097/ACO.0b013e32835e1242. | |
| 12821566 | Background | Magnusson L, Spahn DR. New concepts of atelectasis during general anaesthesia. Br J Anaesth. 2003 Jul;91(1):61-72. doi: 10.1093/bja/aeg085. No abstract available. |
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| 3085429 | Background | Hedenstierna G, Tokics L, Strandberg A, Lundquist H, Brismar B. Correlation of gas exchange impairment to development of atelectasis during anaesthesia and muscle paralysis. Acta Anaesthesiol Scand. 1986 Feb;30(2):183-91. doi: 10.1111/j.1399-6576.1986.tb02393.x. |
| 28554935 | Derived | Ferrando C, Romero C, Tusman G, Suarez-Sipmann F, Canet J, Dosda R, Valls P, Villena A, Serralta F, Jurado A, Carrizo J, Navarro J, Parrilla C, Romero JE, Pozo N, Soro M, Villar J, Belda FJ. The accuracy of postoperative, non-invasive Air-Test to diagnose atelectasis in healthy patients after surgery: a prospective, diagnostic pilot study. BMJ Open. 2017 May 29;7(5):e015560. doi: 10.1136/bmjopen-2016-015560. |