The Safety and Effectiveness of Noninvasive Respiratory Volume Monitoring for Non-Intubated Patients: A Systematic Review
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Objectives: Postoperative respiratory monitoring is essential, particularly following extubation or sedation. Conventional methods such as pulse oximetry and capnography exhibit limited sensitivity for early detection of respiratory insufficiency in non-intubated patients. Respiratory volume moni toring (RVM) utilizes impedance to measure ventilation parameters in real time, enabling timely detection of abnormalities and appropriate interventions. This review evaluates the safety and effec tiveness of RVM in non-intubated postoperative patients. Methods: A literature search was per formed using Ovid-MEDLINE, Ovid-Embase, the Cochrane Library, and KoreaMed databases on September 5, 2024. The quality of included articles was assessed using the Scottish Intercollegiate Guidelines Network tool. Randomized/non-randomized trials, cohort, case-control, and diagnostic studies were included. Results: Five comparative studies were included (two randomized con trolled trials and three diagnostic test studies). In non-intubated patients, the RVM group (standard monitoring plus RVM) demonstrated significant improvements in time spent in hypoventilation, average minute ventilation, and frequency of apneic episodes compared to the control group (stan dard of care alone). RVM reduced the incidence of hypoventilation and apnea and identified cases of hypoventilation not detected by comparator methods (capnography via nasal cannula). Conclu sion: RVM provided objective ventilation data for non-intubated patients, addressing the limita tions of existing tests in measuring ventilation volume. Compared to the control group, the RVM group (standard monitoring plus RVM) showed significant improvement in respiratory parameters, reduced hypoventilation and apnea, and enabled detection of respiratory insufficiency otherwise unrecognized.
Abstract
Objectives: Postoperative respiratory monitoring is essential, particularly following extubation or sedation. Conventional methods such as pulse oximetry and capnography exhibit limited sensitivity for early detection of respiratory insufficiency in non-intubated patients. Respiratory volume moni toring (RVM) utilizes impedance to measure ventilation parameters in real time, enabling timely detection of abnormalities and appropriate interventions. This review evaluates the safety and effec tiveness of RVM in non-intubated postoperative patients. Methods: A literature search was per formed using Ovid-MEDLINE, Ovid-Embase, the Cochrane Library, and KoreaMed databases on September 5, 2024. The quality of included articles was assessed using the Scottish Intercollegiate Guidelines Network tool. Randomized/non-randomized trials, cohort, case-control, and diagnostic studies were included. Results: Five comparative studies were included (two randomized con trolled trials and three diagnostic test studies). In non-intubated patients, the RVM group (standard monitoring plus RVM) demonstrated significant improvements in time spent in hypoventilation, average minute ventilation, and frequency of apneic episodes compared to the control group (stan dard of care alone). RVM reduced the incidence of hypoventilation and apnea and identified cases of hypoventilation not detected by comparator methods (capnography via nasal cannula). Conclu sion: RVM provided objective ventilation data for non-intubated patients, addressing the limita tions of existing tests in measuring ventilation volume. Compared to the control group, the RVM group (standard monitoring plus RVM) showed significant improvement in respiratory parameters, reduced hypoventilation and apnea, and enabled detection of respiratory insufficiency otherwise unrecognized.