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Chiumello D, Fioccola A. Recent advances in cardiorespiratory monitoring in acute respiratory distress syndrome patients. J Intensive Care 2024; 12:17. [PMID: 38706001 PMCID: PMC11070081 DOI: 10.1186/s40560-024-00727-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 04/04/2024] [Indexed: 05/07/2024] Open
Abstract
BACKGROUND Recent advances on cardiorespiratory monitoring applied in ARDS patients undergoing invasive mechanical ventilation and noninvasive ventilatory support are available in the literature and may have potential prognostic implication in ARDS treatment. MAIN BODY The measurement of oxygen saturation by pulse oximetry is a valid, low-cost, noninvasive alternative for assessing arterial oxygenation. Caution must be taken in patients with darker skin pigmentation, who may experience a greater incidence of occult hypoxemia. Dead space surrogates, which are easy to calculate, have important prognostic implications. The mechanical power, which can be automatically computed by intensive care ventilators, is an important parameter correlated with ventilator-induced lung injury and outcome. In patients undergoing noninvasive ventilatory support, the use of esophageal pressure can measure inspiratory effort, avoiding possible delays in endotracheal intubation. Fluid responsiveness can also be evaluated using dynamic indices in patients ventilated at low tidal volumes (< 8 mL/kg). In patients ventilated at high levels of positive end expiratory pressure (PEEP), the PEEP test represents a valid alternative to passive leg raising. There is growing evidence on alternative parameters for evaluating fluid responsiveness, such as central venous oxygen saturation variations, inferior vena cava diameter variations and capillary refill time. CONCLUSION Careful cardiorespiratory monitoring in patients affected by ARDS is crucial to improve prognosis and to tailor treatment via mechanical ventilatory support.
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Affiliation(s)
- Davide Chiumello
- Department of Health Sciences, University of Milan, Milan, Italy.
- Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital Milan, Via Di Rudinì 9, Milan, Italy.
- Coordinated Research Center on Respiratory Failure, University of Milan, Milan, Italy.
| | - Antonio Fioccola
- Department of Health Sciences, University of Milan, Milan, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
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2
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Jain R, Jain A, Jain S, Jain R, Panwar P, Goyal M, Jain AK, Meena M, Gupta P, Manghwani H, Gupta D. Correlation of oxygenation indices in invasive mechanical ventilated adult patients. Lung India 2024; 41:176-180. [PMID: 38687227 PMCID: PMC11093138 DOI: 10.4103/lungindia.lungindia_523_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 11/30/2023] [Accepted: 12/19/2023] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Mechanical ventilation is essential for managing acute respiratory failure, but traditional methods of assessing oxygenation, like the PaO2/FiO2 ratio, pose challenges due to invasiveness and cost. OBJECTIVE This single-centre prospective observational study aimed to assess the potential of the non-invasive Oxygen Saturation Index (OSI), utilising SpO2 measurements, to diagnose hypoxemia in mechanically ventilated adults. The study sought to establish correlations between OSI, oxygenation index (OI), PaO2/FiO2 ratio and SpO2/FiO2 ratio. METHODS From August 2022 to July 2023, data was collected from 1055 mechanically ventilated intensive care unit patients. Statistical analysis included correlation tests, receiver operating curve (ROC) analysis and cut-off value determination for hypoxemia diagnosis. RESULTS We found that the P/F ratio had a statistically significant negative correlation with OI (correlation coefficient -0.832, P value: 0.000 in hypoxemic group and correlation coefficient -0.888, P value: 0.000 in the non-hypoxemic group), and OSI (correlation coefficient -0.746, P value: 0.000 in hypoxemic group and correlation coefficient -0.629, P value: 0.000 in non-hypoxemic group) and has a positive correlation with P/F ratio (correlation coefficient 0.92, P value: 0.000 in hypoxemic group and correlation coefficient -0.67, P value: 0.000 in non-hypoxemic group). OI and OSI had a statistically significant correlation (correlation coefficient 0.955, P value: 0.000 in hypoxemic group and correlation coefficient 0.815, P value: 0.000 in non-hypoxemic group). on ROC analysis P/F ratio was the most accurate in predicting hypoxia followed by OI and OSI. with a cut-off value, of OI being 7.07, and that for OSI being 3.90, at an 80% sensitivity level to diagnose hypoxemia. CONCLUSION OSI can serve as a dependable surrogate for OI, simplifying ARDS severity assessment. The P/F ratio is the most accurate predictor of hypoxia. Further research, especially in larger multicentre studies, is needed to validate these findings and explore the long-term clinical implications of using OSI for oxygenation monitoring in mechanically ventilated patients.
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Affiliation(s)
- Ravi Jain
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Ashish Jain
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Srishti Jain
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Rohit Jain
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Puneet Panwar
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Manish Goyal
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Anand Kumar Jain
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Munesh Meena
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Priyamvada Gupta
- Department of Anesthesiology, Critical Care and Pain, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
| | - Hetal Manghwani
- Department of Critical Care Medicine, Fortis Hospital, Jaipur, Rajasthan, India
| | - Divyansh Gupta
- Department of Critical Care Medicine, Mahatma Gandhi Medical College and Hospital, Jaipur, Rajasthan, India
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3
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Rangappa R. A Game Changer for ARDS? Unraveling the Potential of the SF Ratio. Indian J Crit Care Med 2024; 28:191-192. [PMID: 38476999 PMCID: PMC10926036 DOI: 10.5005/jp-journals-10071-24678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024] Open
Abstract
Rangappa R. A Game Changer for ARDS? Unraveling the Potential of the SF Ratio. Indian J Crit Care Med 2024;28(3):191-192.
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Affiliation(s)
- Rajavardhan Rangappa
- Department of Critical Care Medicine, Manipal Hospital, Whitefield, Bengaluru, Karnataka, India
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4
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Alur TR, Iyer SS, Shah JN, Kulkarni S, Jedge P, Patil V. A Prospective Observational Study Comparing Oxygen Saturation/Fraction of Inspired Oxygen Ratio with Partial Pressure of Oxygen in Arterial Blood/Fraction of Inspired Oxygen Ratio among Critically Ill Patients Requiring Different Modes of Oxygen Supplementation in Intensive Care Unit. Indian J Crit Care Med 2024; 28:251-255. [PMID: 38476998 PMCID: PMC10926040 DOI: 10.5005/jp-journals-10071-24652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/22/2024] [Indexed: 03/14/2024] Open
Abstract
Background Intensive care unit (ICU) patients face a significant rise in mortality rates due to acute hypoxemic respiratory failure (AHRF). The diagnosis of AHRF is based on the PF ratio, but it has limitations in resource-constrained settings. Instead, the Kigali modification suggests using the oxygen saturation/fraction of inspired oxygen (SF) ratio. This study aims to correlate SF ratio and arterial oxygen pressure (PF) ratio in critically ill adults with hypoxemic respiratory failure, who required O2 therapy through different modes of oxygen supplementation. Materials and methods In an ICU, a prospective observational study included 125 adult AHRF patients receiving oxygen therapy, with data collected on FiO2, PaO2, and SpO2. The SF ratio and PF ratio were calculated, and their correlation was assessed using statistical analysis. The receiver operator characteristics (ROC) curve analysis was conducted to assess the diagnostic precision of the SF ratio in identifying AHRF. Results Data from a total of 250 samples were collected. The study showed a positive correlation (r = 0.622) between the SF ratio and the PF ratio. The SF threshold values of 252 and 321 were established for PF values of 200 and 300, respectively, featuring a sensitivity of 69% and specificity of 95%. Furthermore, it is worth noting that the PF ratio and SF ratio are interchangeable, regardless of the type of oxygen therapy, as the median values of both the PF ratio and SF ratio displayed statistical significance (p < 0.01) in both acidosis and alkalosis conditions. Conclusion For patients with AHRF, the noninvasive SF ratio can effectively serve as a substitute for the invasive PF ratio across all oxygen supplementation modes. How to cite this article Alur TR, Iyer SS, Shah JN, Kulkarni S, Jedge P, Patil V. A Prospective Observational Study Comparing Oxygen Saturation/Fraction of Inspired Oxygen Ratio with Partial Pressure of Oxygen in Arterial Blood/Fraction of Inspired Oxygen Ratio among Critically Ill Patients Requiring Different Modes of Oxygen Supplementation in Intensive Care Unit. Indian J Crit Care Med 2024; 28(3):251-255.
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Affiliation(s)
- T Rakesh Alur
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Shivakumar S Iyer
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Jignesh N Shah
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Sampada Kulkarni
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Prashant Jedge
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Vishwanath Patil
- Department of Critical Care Medicine, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
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Bastidas-Goyes AR, Tuta-Quintero E, Aguilar MF, Mora AV, Aponte HC, Villamizar JM, Galeano S, Mejia P, Muñoz M, Paredes S, Pumarejo D, Barragan MDM. Performance of oxygenation indices and risk scores to predict invasive mechanical ventilation and mortality in COVID-19. BMC Pulm Med 2024; 24:68. [PMID: 38308270 PMCID: PMC10835882 DOI: 10.1186/s12890-023-02807-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 12/07/2023] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Information on the performance of oxygenation indices (OIs) and risk scores in patients requiring invasive mechanical ventilation (IMV) is limited. We determine the performance of the OIs and risk scores in hospitalized patients with COVID-19 to predict the requirement of IMV and death at 28 days after admission. METHODS A retrospective study of diagnostic tests in patients admitted to the emergency department, hospitalization, and intensive care unit diagnosed with COVID-19. The receiver operating characteristic curve (ROC-curve) were built with the OIs and risk scores to predict IMV and mortality. RESULTS A total of 1402 subjects entered the final analysis, of whom 19.5% (274/1402) received IMV and 23.0% (323/1402) died at 28 days. The ROC-curve of the delta PaO2/FiO2 ratio for the requirement of IMV and mortality at 28-day was 0.589 (95% CI: 0.546-0.632) and 0.567 (95% CI: 0.526-0.608), respectively. PaO2/FiO2 ≤ 300 shows a ROC curve of 0.669 (95% CI: 0.628-0.711) to predict IMV. PaO2/FiO2 ≤ 300 and 4 C mortality score in mortality at 28 days showed an ROC-curve of 0.624 (95% CI: 0.582-0.667) and 0.706 (95% CI: 0.669-0.742), respectively. CONCLUSION PaO2/FiO2 ≤ 300, 4 C mortality score ≥ 8, SOFA score ≥ 4 y SaO2/FiO2 ≤ 300 were weak predictors of the IMV requirement from admission, and 4 C mortality score ≥ 8 was weak predictors of the mortality from admission in patients with pulmonary involvement by COVID-19.
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Affiliation(s)
- Alirio R Bastidas-Goyes
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia.
| | - Eduardo Tuta-Quintero
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Maria F Aguilar
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Angélica V Mora
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | | | - Jesus M Villamizar
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Susana Galeano
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Paola Mejia
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Maria Muñoz
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Sara Paredes
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Doris Pumarejo
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
| | - Maria Del Mar Barragan
- School of Medicine, Internal Medicine Department, Universidad de La Sabana, Km 7, Northern highway. Chía, Chía, Cundinamarca 140013, Colombia
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6
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Wu SH, Kor CT, Chi SH, Li CY. Categorizing Acute Respiratory Distress Syndrome with Different Severities by Oxygen Saturation Index. Diagnostics (Basel) 2023; 14:37. [PMID: 38201346 PMCID: PMC10795683 DOI: 10.3390/diagnostics14010037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
The oxygen saturation index (OSI), defined by FIO2/SpO2 multiplied by the mean airway pressure, has been reported to exceed the Berlin definition in predicting the mortality of acute respiratory distress syndrome (ARDS). The OSI has served as an alternative to the Berlin definition in categorizing pediatric ARDS. However, the use of the OSI for the stratification of adult ARDS has not been reported. A total of 379 invasively ventilated adult ARDS patients were retrospectively studied. The ARDS patients were classified into three groups by their incidence rate of mortality: mild (OSI < 14.69), moderate (14.69 < OSI < 23.08) and severe (OSI > 23.08). OSI-based categorization was highly correlated with the Berlin definition by a Kendall's tau of 0.578 (p < 0.001). The Kaplan-Meier curves of the three OSI-based groups were significantly different (p < 0.001). By the Berlin definition, the hazard ratio for 28-day mortality was 0.58 (0.33-1.05) and 0.95 (0.55-1.67) for the moderate and severe groups, respectively (compared to the mild group). In contrast, the corresponding hazard ratio was 1.01 (0.69-1.47) and 2.39 (1.71-3.35) for the moderate and severe groups defined by the OSI. By multivariate analysis, OSI-based severe ARDS was independently associated with 28-D or 90-D mortality. In conclusion, we report the first OSI-based stratification for adult ARDS and find that it serves well as an alternative to the Berlin definition.
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Affiliation(s)
- Shin-Hwar Wu
- Division of Critical Care Internal Medicine, Department of Emergency Medicine and Critical Care, Changhua Christian Hospital, Changhua 50006, Taiwan
| | - Chew-Teng Kor
- Big Data Center, Changhua Christian Hospital, Changhua 50006, Taiwan;
- Graduate Institute of Statistics and Information Science, National Changhua University of Education, Changhua 50006, Taiwan
| | - Shu-Hua Chi
- Section of Respiratory Therapy, Department of Emergency Medicine and Critical Care, Changhua Christian Hospital, Changhua 50006, Taiwan; (S.-H.C.); (C.-Y.L.)
| | - Chun-Yu Li
- Section of Respiratory Therapy, Department of Emergency Medicine and Critical Care, Changhua Christian Hospital, Changhua 50006, Taiwan; (S.-H.C.); (C.-Y.L.)
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7
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Weerasuriya S, Vlachos S, Bobo A, Jayaprabhu NB, Matthews L, Blackstock AR, Metaxa V. Evaluating the use of the respiratory-rate oxygenation index as a predictor of high-flow nasal cannula oxygen failure in COVID-19. Acute Crit Care 2023; 38:31-40. [PMID: 36935532 PMCID: PMC10030235 DOI: 10.4266/acc.2022.01081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/12/2022] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND It can be challenging for clinicians to predict which patients with respiratory failure secondary to coronavirus disease 2019 (COVID-19) will fail on high-flow nasal cannula (HFNC) oxygen and require escalation of therapy. This study set out to evaluate the association between the respiratory rate-oxygenation index (ROX) and HFNC failure in such patients and to assess whether ROX trajectory correlates with treatment failure. METHODS This was a single-centre, retrospective, observational study of patients with COVID-19 requiring HFNC, conducted over a 3-month period. ROX was calculated as "pulse-oximetry oxygen saturation (SpO2) over the fractional inspired oxygen concentration (FiO2)/respiratory rate" for each patient at 2, 4, and 12 hours from starting HFNC. HFNC failure was defined as escalation to continuous positive airway pressure ventilation or invasive mechanical ventilation (IMV). Time-to-event analyses were performed to account for the longitudinal data set and time-dependent variables. RESULTS We included 146 patients. Ninety-three (63.7%) experienced HFNC failure, with 53 (36.3%) requiring IMV. Higher ROX values were associated with a lower subhazard of HFNC failure on time-to-HFNC failure analysis (subhazard ratio, 0.29; 95% confidence interval [CI], 0.18-0.46; P<0.001). This remained true after controlling for informative censoring. Median ROX values changed differentially over time, increasing in the HFNC success group (0.06 per hour; 95% CI, 0.05-0.08; P<0.001) but not in the HFNC failure group (0.004 per hour; 95% CI, -0.05 to 0.08; P=0.890). CONCLUSIONS A higher ROX is associated with a lower risk of HFNC failure. Monitoring ROX trajectory over time may help identify patients at risk of treatment failure. This has potential clinical applications; however, future prospective studies are required.
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Affiliation(s)
- Scott Weerasuriya
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Savvas Vlachos
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Ahmed Bobo
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | | | - Lauren Matthews
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Adam R Blackstock
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
| | - Victoria Metaxa
- Department of Critical Care Medicine, King's College Hospital NHS Foundation Trust, London, UK
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8
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Saelim K, Thirapaleka B, Ruangnapa K, Prasertsan P, Anuntaseree W. Predictors of high-flow nasal cannula failure in pediatric patients with acute respiratory distress. Clin Exp Pediatr 2022; 65:595-601. [PMID: 36457201 PMCID: PMC9742760 DOI: 10.3345/cep.2022.00241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 08/06/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Heated humidified high-flow nasal cannula (HFNC) has gained popularity recently and is considered a standard respiratory support tool for pediatric patients with acute respiratory distress. However, data are limited on the bedside parameters that can predict HFNC failure in pediatric patients. PURPOSE To evaluate the performance of SpO2/FiO2 (SF) ratio, pediatric respiratory rate-oxygenation (pROX) index, and clinical respiratory score (CRS), for predicting the HFNC outcomes. METHODS This prospective observational study included 1- month to 15-year-old patients with acute respiratory distress who required HFNC support. The HFNC setting, vital signs, CRS, and treatment outcomes were recorded. Data were analyzed to determine the predictors of HFNC failure. RESULTS Eighty-two children participated in the study, 16 of whom (19.5%) did not respond to HFNC treatment (failure group). Pneumonia was the main reason for intubation (62.5%). Predictors of HFNC failure at 12 hours were: SF index ≤166 (sensitivity, 62.5%; specificity, 87.8%; area under the curve [AUC], 0.75), pROX index <132 (sensitivity, 68.7%; specificity, 84.8%; AUC, 0.77), and CRS ≥6 (sensitivity, 87.5%; specificity, 96.9%; AUC, 0.92). CONCLUSION The CRS was the most accurate predictor of HFNC failure in pediatric patients. A CRS ≥ 6 at 12 hours after HFNC initiation and pROX, a newly modified parameter, are helpful indicators of HFNC failure.
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Affiliation(s)
- Kantara Saelim
- Division of Pulmonology and Critical Care Medicine, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Thailand
| | - Busawan Thirapaleka
- Division of Pulmonology and Critical Care Medicine, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Thailand
| | - Kanokpan Ruangnapa
- Division of Pulmonology and Critical Care Medicine, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Thailand
| | - Pharsai Prasertsan
- Division of Pulmonology and Critical Care Medicine, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Thailand
| | - Wanaporn Anuntaseree
- Division of Pulmonology and Critical Care Medicine, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Thailand
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Wick KD, Matthay MA, Ware LB. Pulse oximetry for the diagnosis and management of acute respiratory distress syndrome. THE LANCET. RESPIRATORY MEDICINE 2022; 10:1086-1098. [PMID: 36049490 PMCID: PMC9423770 DOI: 10.1016/s2213-2600(22)00058-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/30/2022] [Accepted: 02/10/2022] [Indexed: 02/07/2023]
Abstract
The diagnosis of acute respiratory distress syndrome (ARDS) traditionally requires calculation of the ratio of partial pressure of arterial oxygen to fraction of inspired oxygen (PaO2/FiO2) using arterial blood, which can be costly and is not possible in many resource-limited settings. By contrast, pulse oximetry is continuously available, accurate, inexpensive, and non-invasive. Pulse oximetry-based indices, such as the ratio of pulse-oximetric oxygen saturation to FiO2 (SpO2/FiO2), have been validated in clinical studies for the diagnosis and risk stratification of patients with ARDS. Limitations of the SpO2/FiO2 ratio include reduced accuracy in poor perfusion states or above oxygen saturations of 97%, and the potential for reduced accuracy in patients with darker skin pigmentation. Application of pulse oximetry to the diagnosis and management of ARDS, including formal adoption of the SpO2/FiO2 ratio as an alternative to PaO2/FiO2 to meet the diagnostic criterion for hypoxaemia in ARDS, could facilitate increased and earlier recognition of ARDS worldwide to advance both clinical practice and research.
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Affiliation(s)
- Katherine D Wick
- Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Michael A Matthay
- Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Lorraine B Ware
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA.
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Utility of Pulse Oximetry Oxygen Saturation (SpO2) with Incorporation of Positive End-Expiratory Pressure (SpO2 10/FiO2 PEEP) for Classification and Prognostication of Patients with Acute Respiratory Distress Syndrome. Crit Care Res Pract 2022; 2022:7871579. [PMID: 36111248 PMCID: PMC9470362 DOI: 10.1155/2022/7871579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 06/30/2022] [Accepted: 07/27/2022] [Indexed: 11/17/2022] Open
Abstract
Background. Conventionally, PaO2/FiO2 (P/F ratio) has been used to categorize severity of acute respiratory distress syndrome (ARDS) and prognostication of outcome. Recent literature has shown that incorporation of positive end-expiratory pressure (PEEP) into the P/F ratio (PaO2
10/FiO2
PEEP or P/FP
10) has a much better prognostic ability in ARDS as compared to P/F ratio. The aim of this study was to correlate SpO2
10/FiO2
PEEP (S/FP
10) to PaO2
10/FiO2
PEEP (P/FP
10) and evaluate the utility of S/FP
10 as a reliable noninvasive indicator of oxygenation in ARDS to avoid repeated arterial blood sampling. Aim. To evaluate if pulse oximetry is a reliable indicator of oxygenation in ARDS patients by calculating SpO2
10/FiO2
PEEP (S/FP
10). The primary objective was to determine the correlation of S/FP
10 to P/FP
10 ratio in ARDS patients. The secondary objective was to determine the cut-off value of S/FP
10 ratio to predict severe ARDS and survival. Methods. Patients aged 18–80 years on invasive mechanical ventilation (MV) diagnosed with ARDS as defined by the Berlin definition were included. The values of PaO2, FiO2, and SpO2 were collected at three different time points. They were at baseline, i.e., after intubation and initiation of MV (within one hour of intubation), day one (1–24 hours of MV), and day three (48–72 hours of MV). The primary outcome was survival at the end of intensive care unit (ICU) stay. Results. A total of 85 patients with ARDS on invasive MV were included. The data points were obtained at baseline, day one, and day three of MV. S/FP
10 ratio has an excellent correlation to P/FP
10 ratio at baseline and day three of invasive MV (r = 0.831 and 0.853, respectively;
) and has a strong correlation on day one of invasive MV (r = 0.733,
). S/FP
10 ratio ≤116 at baseline has excellent discriminant function to be categorized as severe ARDS as per Berlin definition (AUC: 0.925,
, 90% sensitivity, 93% specificity, CI: [0.862–0.988]). The increase in S/FP
10 ratio by ≥64.40 from baseline to day three of MV is a good predictor of survival (AUC: 0.877,
, 73.5% sensitivity, 97% specificity, CI: [0.803–0.952]). Conclusion. S/FP
10 has a strong correlation to P/FP
10 in ARDS patients. S/FP
10 ≤116 has an excellent discriminant function to be categorized as severe ARDS. The S/FP
10 ratio on day three of MV and the change in S/FP
10 ratio from baseline and day one to day three of MV are good predictors of survival in ARDS patients. This trial is registered with CTRI/2020/04/024940.
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Performance of the CORB (Confusion, Oxygenation, Respiratory Rate, and Blood Pressure) Scale for the Prediction of Clinical Outcomes in Pneumonia. Can Respir J 2022; 2022:4493777. [PMID: 35692950 PMCID: PMC9187474 DOI: 10.1155/2022/4493777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 03/31/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022] Open
Abstract
Background. Community-acquired pneumonia (CAP) is a common cause of morbidity and mortality due to misdiagnosis and inappropriate treatment approaches. Objective. To assess the performance of the CORB score in subjects with CAP for predicting in-hospital mortality, death within 30 days of admission, and requirement for invasive mechanical ventilation (IMV) and vasopressor support. Methods. A retrospective, cohort study with diagnostic test analysis of CORB and CURB-65 scores in subjects with CAP according to ATS criteria was undertaken. An alternative CORB score was estimated by replacing SpO2 ≤90% by the SpO2/FiO2 ratio. Crude and adjusted odd ratios (AOR) were calculated for each variable. The area under the receiver operating characteristics curve (AUROC) was constructed for each score, and outcomes were analyzed. AUROCs were compared with the DeLong test, considering a p value
statistically significant. Results. From 1,811 subjects who entered the analysis, 15.1% (273/1,811) died in hospital, 8.78% required IMV (159/1,811), and 9.77% (177/1,811) needed vasopressor support. CORB had an AUROC of 0,660 (95% CI: 0,623–0,697) for in-hospital mortality; an AUROC of 0,657 (95% CI: 0,621–0,692) for 30-day mortality; an AUROC of 0,637 (CI 95%: 0,589–0,685) for IMV requirement; and an AUROC of 0,635 (95% CI: 0,589–0,681) for vasopressor support. CORB performance increases when the SpO2/FiO2 ratio <300 is used as oxygenation criterion in the prediction of requirement for IMV and vasopressor support, with AUROC of 0,700 (95% CI: 0,654–0,746;
) and AUROC of 0,702 (95% CI: 0,66–0,745;
), respectively. CURB-65 score presents an in-hospital mortality AUROC of 0,727 (95% CI: 0,695–0,759) and 30-day mortality AUROC of 0,726 (95% CI: 0,695–0,756). Conclusions. CORB score has a good performance in predicting the need for IMV and vasopressor support in CAP patients. This performance improves when the SpO2/FiO2 ratio <300 is used instead of the SpO2 ≤90% as the oxygenation parameter. CURB-65 score is superior in the prediction of mortality.
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Praveen Kumar G, Kakar V. Custodian of Oxygen Monitoring: Is There a Winner? Indian J Crit Care Med 2021; 25:967-968. [PMID: 34963710 PMCID: PMC8664014 DOI: 10.5005/jp-journals-10071-23970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
How to cite this article: Praveen Kumar G, Kakar V. Custodian of Oxygen Monitoring: Is There a Winner? Indian J Crit Care Med 2021;25(9):967-968.
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Affiliation(s)
- G Praveen Kumar
- Critical Care Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Vivek Kakar
- Critical Care Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
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