scholarly journals Is obstructive sleep apnoea associated with hypoxaemia and prolonged ICU stay after type A aortic dissection repair? A retrospective study in Chinese population

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xin Xi ◽  
Yu Chen ◽  
Wei-Guo Ma ◽  
Jiang Xie ◽  
Yong-Min Liu ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Aortic Dissection ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Sleep Apnoea ◽  
Type A Aortic Dissection ◽  
Icu Stay ◽  
Obstructive Sleep ◽  
Operating Characteristic Curve ◽  
Prolonged Icu Stay

Abstract Background Although obstructive sleep apnoea (OSA) is prevalent among patients with aortic dissection, its prognostic impact is not yet determined in patients undergoing major vascular surgery. We aimed to investigate the association of OSA with hypoxaemia and with prolonged intensive care unit (ICU) stay after type A aortic dissection (TAAD) repair. Methods This retrospective study continuously enrolled 83 patients who underwent TAAD repair from January 1 to December 31, 2018. OSA was diagnosed by sleep test and defined as an apnoea hypopnea index (AHI) of ≥ 15/h, while an AHI of > 30/h was defined severe OSA. Hypoxaemia was defined as an oxygenation index (OI) of < 200 mmHg. Prolonged ICU stay referred to an ICU stay of > 72 h. Receiver operating characteristic curve analysis was performed to evaluate the predictive value of postoperative OI for prolonged ICU stay. Multivariate logistic regression was performed to assess the association of OSA with hypoxaemia and prolonged ICU stay. Results A total of 41 (49.4%) patients were diagnosed with OSA using the sleep test. Hypoxaemia occurred postoperatively in 56 patients (67.5%). Postoperatively hypoxaemia developed mostly in patients with OSA (52.4% vs. 83.0%, p = 0.003), and particularly in those with severe OSA (52.4% vs. 90.5%, p = 0.003). The postoperative OI could fairly predict a prolonged ICU stay (area under the receiver-operating characteristic curve, 0.72; 95% confidence intervals [CI] 0.60–0.84; p = 0.002). Severe OSA was associated with both postoperative hypoxaemia (odds ratio [OR] 6.65; 95% CI 1.56–46.26, p = 0.008) and prolonged ICU stay (OR 5.58; 95% CI 1.54–20.24, p = 0.009). Conclusions OSA was common in patients with TAAD. Severe OSA was associated with postoperative hypoxaemia and prolonged ICU stay following TAAD repair.

scholarly journals Is Obstructive Sleep Apnoea Associated with Hypoxemia and Prolonged ICU Stay after Type A Aortic Dissection Repair?

2021 ◽  
Author(s):  
Xin Xi ◽  
Yu Chen ◽  
Wei-Guo Ma ◽  
Jiang Xie ◽  
Yong-Min Liu ◽  
...  
Keyword(s):  
Aortic Dissection ◽  
Obstructive Sleep Apnoea ◽  
Multivariable Analysis ◽  
Type A ◽  
Sleep Apnoea ◽  
Prognostic Impact ◽  
Type A Aortic Dissection ◽  
Icu Stay ◽  
Obstructive Sleep ◽  
Prolonged Icu Stay

Abstract Background : Although obstructive sleep apnoea (OSA) is prevalent among patients with aortic dissection, its prognostic impact is not yet determined in patients undergoing major vascular surgery. We aimed to investigate the association of OSA with hypoxemia and with prolonged intensive care unit (ICU) stay after type A aortic dissection (TAAD) repair. Methods: This study enrolled 83 patients who underwent TAAD repair. OSA diagnosis was confirmed by a preoperative STOP-BANG questionnaire and a sleep test performed within 90 days postoperatively. OSA was defined as an apnoea hypopnea index (AHI) of ≥15/h, while an AHI of >30/h was defined severe OSA. Hypoxemia was defined as an oxygenation index (OI) of <200 mmHg, 6 h postoperatively and prolonged ICU referred to an ICU stay of >72 h. Multivariable analysis was performed to assess the association of OSA with hypoxemia and prolonged ICU stay. Results: OSA was diagnosed in 41 patients (49.4%), which was consistent with the detection by using a preoperative STOP-BANG score of ≥4 (Kappa=0.424, P<0.01). Hypoxemia occurred postoperatively in 56 patients (67.5%). Postoperatively hypoxemia developed mostly in OSA patients (52.4% vs. 83.0%, P<0.01), and particularly in those with severe OSA ( 52.4% vs. 90.5%, P<0.01). The postoperative OI could fairly predict a prolonged ICU stay (area under the curve, 0.719; 95% CI 0.595-0.843; P=0.002). Severe OSA was a predictor of both postoperative hypoxemia (odds ratio [OR] 6.65; 95% CI 1.56-46.26, P<0.01) and prolonged ICU stay (OR 5.58; 95% CI 1.54-20.24, P<0.01). Conclusions: OSA was common in patients with TAAD. Severe OSA was predictive of hypoxemia and prolonged ICU stay after TAAD repair. The STOP-BANG score may offer diagnostic clues to OSA in patients with TAAD.

scholarly journals Machine Learning Models for Predicting In-Hospital Mortality in Acute Aortic Dissection Patients

2021 ◽  
Vol 8 ◽  
Author(s):  
Tuo Guo ◽  
Zhuo Fang ◽  
Guifang Yang ◽  
Yang Zhou ◽  
Ning Ding ◽  
...  
Keyword(s):  
Machine Learning ◽  
Aortic Dissection ◽  
Hospital Mortality ◽  
Receiver Operating Characteristic Curve ◽  
Operating Characteristic ◽  
Acute Aortic Dissection ◽  
Characteristic Curve ◽  
Survivor Group ◽  
Treatment Type ◽  
Operating Characteristic Curve

Background: Acute aortic dissection is a potentially fatal cardiovascular disorder associated with high mortality. However, current predictive models show a limited ability to efficiently and flexibly detect this mortality risk, and have been unable to discover a relationship between the mortality rate and certain variables. Thus, this study takes an artificial intelligence approach, whereby clinical data-driven machine learning was utilized to predict the in-hospital mortality of acute aortic dissection.Methods: Patients diagnosed with acute aortic dissection between January 2015 to December 2018 were voluntarily enrolled from the Second Xiangya Hospital of Central South University in the study. The diagnosis was defined by magnetic resonance angiography or computed tomography angiography, with an onset time of the symptoms being within 14 days. The analytical variables included demographic characteristics, physical examination, symptoms, clinical condition, laboratory results, and treatment strategies. The machine learning algorithms included logistic regression, decision tree, K nearest neighbor, Gaussian naive bayes, and extreme gradient boost (XGBoost). Evaluation of the predictive performance of the models was mainly achieved using the area under the receiver operating characteristic curve. SHapley Additive exPlanation was also implemented to interpret the final prediction model.Results: A total of 1,344 acute aortic dissection patients were recruited, including 1,071 (79.7%) patients in the survivor group and 273 (20.3%) patients in non-survivor group. The extreme gradient boost model was found to be the most effective model with the greatest area under the receiver operating characteristic curve (0.927, 95% CI: 0.860–0.968). The three most significant aspects of the extreme gradient boost importance matrix plot were treatment, type of acute aortic dissection, and ischemia-modified albumin levels. In the SHapley Additive exPlanation summary plot, medical treatment, type A acute aortic dissection, and higher ischemia-modified albumin level were shown to increase the risk of hospital-based mortality.

scholarly journals Sensitivity and Specificity of Spectral Oct in Patients with Early Glaucoma

2019 ◽  
Vol 75 (5) ◽  
pp. 260-264
Author(s):  
Magdaléna Bočková ◽  
Petr Veselý ◽  
Svatopluk Synek ◽  
Lubomír Hanák ◽  
Pavel Beneš
Keyword(s):  
Retrospective Study ◽  
Visual Field ◽  
Sensitivity And Specificity ◽  
Area Under Curve ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Test Statistics ◽  
Early Glaucoma ◽  
Spectral Oct ◽  
Operating Characteristic Curve

The study examines the sensitivity and specificity of spectral OCT in detecting early glaucoma. The aim was to evaluate data obtained by RNFL analysis in 4 observed quadrants and to compare it with the resulting diagnosis of glaucoma neuropathy determined subsequently on the basis of changes in the visual field. This concerns a retrospective study numbering 31 probands who underwent OCT examination at our centre in the period from 2008 to 2017. Test statistics demonstrated sensitivity of OCT examination (specific RNFL analysis) of 63.64% and specificity of 90%. The used ROC (receiver operating characteristic curve) test showed an AUC (area under curve) value of 0.734 on a statistically significant level of p = 0.0097. We therefore found that the instrument Spectral OCT SLO, with the aid of RNFL analysis, was effective in determining probands in whom development of glaucoma pathology was subsequently confirmed.

scholarly journals Decision Threshold for Kryptor sFlt‐1/PlGF Ratio in Women With Suspected Preeclampsia: Retrospective Study in a Routine Clinical Setting

2021 ◽  
Author(s):  
Lise Lotte Torvin Andersen ◽  
Annemarie Helt ◽  
Lene Sperling ◽  
Martin Overgaard
Keyword(s):  
Retrospective Study ◽  
Early Onset ◽  
Operating Characteristic ◽  
Late Onset ◽  
Characteristic Curve ◽  
Predictive Performance ◽  
Decision Threshold ◽  
Operating Characteristic Curve ◽  
Early Onset Preeclampsia ◽  
Plgf Ratio

Background The objective was to evaluate predictive performance and optimal decision threshold of the Kryptor soluble fms‐like tyrosine kinase‐1 (sFlt‐1)/placental growth factor (PlGF) ratio when implemented for routine management of women presenting with symptoms of preeclampsia. Methods and Results Observational retrospective study of a cohort of 501 women with suspected preeclampsia after 20 weeks of gestation. Women referred to maternity ward for observation of preeclampsia had an sFlt‐1/PlGF ratio test included in routine diagnostic workup. Maternal and offspring characteristic data included maternal risk factors, outcomes, delivery mode, and indication for suspected preeclampsia. Biochemical measurements to determine sFlt‐1/PlGF ratio were performed using the BRAHMS/Kryptor sFlt‐1/PlGF ratio immunoassays. Results were analyzed by area under receiver‐operating characteristic curve. Preeclampsia occurred in 150 of 501 (30%) of symptomatic women with an sFlt‐1/PlGF ratio determined before the time of diagnosis. Area under receiver‐operating characteristic curve for diagnosis of early‐onset preeclampsia within 1 and 4 weeks was 0.98 (95% CI, 0.96–1.00) and 0.95 (95% CI, 0.92–0.98), respectively. For late‐onset preeclampsia, predictive performance within 1 and 4 weeks was lower: 0.90 (95% CI, 0.85–0.94) and 0.85 (95% CI, 0.80–0.90), respectively. The optimal single sFlt‐1/PlGF ratio threshold for all preeclampsia and late‐onset preeclampsia within 1 and 4 weeks was 66. The negative and positive predictive values for ruling out and ruling in developing preeclampsia within 1 week were 96% and 70%, respectively. Conclusions The Kryptor sFlt‐1/PlGF ratio is a useful clinical tool ruling out and in preeclampsia within 1 week. Prediction within 4 weeks is superior for early‐onset preeclampsia. A single decision threshold of 66 is indicated for use in clinical routine.

Complications and risk factors for severe outcome in children with measles

2019 ◽  
Vol 105 (9) ◽  
pp. 896-899 ◽  
Author(s):  
Andrea Lo Vecchio ◽  
Andrzej Krzysztofiak ◽  
Carlotta Montagnani ◽  
Piero Valentini ◽  
Nadia Rossi ◽  
...  
Keyword(s):  
Risk Factors ◽  
Intensive Care ◽  
Retrospective Study ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Multivariable Analysis ◽  
C Reactive Protein ◽  
Reactive Protein ◽  
Operating Characteristic Curve ◽  
Organ Complications

Objective and designRisk factors for severe measles are poorly investigated in high-income countries. The Italian Society for Paediatric Infectious Diseases conducted a retrospective study in children hospitalised for measles from January 2016 to August 2017 to investigate the risk factors for severe outcome defined by the presence of long-lasting sequelae, need of intensive care or death.ResultsNineteen hospitals enrolled 249 children (median age 14.5 months): 207 (83%) children developed a complication and 3 (1%) died. Neutropaenia was more commonly reported in children with B3-genotype compared with other genotypes (29.5% vs 7.7%, p=0.01). Pancreatitis (adjusted OR [aOR] 9.19, p=0.01) and encephalitis (aOR 7.02, p=0.04) were related to severe outcome in multivariable analysis, as well as C reactive protein (CRP) (aOR 1.1, p=0.028), the increase of which predicted severe outcome (area under the receiver operating characteristic curve 0.67, 95% CI 0.52 to 0.82). CRP values >2 mg/dL were related to higher risk of complications (OR 2.0, 95% CI 1.15 to 3.7, p=0.01) or severe outcome (OR 4.13, 95% CI 1.43 to 11.8, p<0.01).ConclusionThe risk of severe outcome in measles is independent of age and underlying conditions, but is related to the development of organ complications and may be predicted by CRP value.

Serum miR-21 and miR-26a Levels Negatively Correlate with Severity of Cirrhosis in Patients with Chronic Hepatitis B

MicroRNA ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 86-92 ◽  
Author(s):  
Shili Jiang ◽  
Wei Jiang ◽  
Ying Xu ◽  
Xiaoning Wang ◽  
Yongping Mu ◽  
...  
Keyword(s):  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Curve Analysis ◽  
Pugh Class ◽  
Operating Characteristic Curve ◽  
Class C ◽  
Circulating Levels

Background and Objective: Accurately evaluating the severity of liver cirrhosis is essential for clinical decision making and disease management. This study aimed to evaluate the value of circulating levels of microRNA (miR)-26a and miR-21 as novel noninvasive biomarkers in detecting severity of cirrhosis in patients with chronic hepatitis B. </P><P> Methods: Thirty patients with clinically diagnosed chronic hepatitis B-related cirrhosis and 30 healthy individuals were selected. The serum levels of miR-26a and miR-21 were quantified by qRT-PCR. Receiver operating characteristic curve analysis was performed to evaluate the sensitivity and specificity of the miRNAs for detecting the severity of cirrhosis. Results: Serum miR-26a and miR-21 levels were found to be significantly downregulated in patients with severe cirrhosis scored at Child-Pugh class C in comparison to healthy controls (miR-26a p<0.01, and miR-21 p<0.001, respectively). The circulating miR-26a and miR-21 levels in patients were positively correlated with serum albumin concentration but negatively correlated with serum total bilirubin concentration and prothrombin time. Receiver operating characteristic curve analysis revealed that both serum miR-26a and miR-21 levels were associated with a high diagnostic accuracy for patients with cirrhosis scored at Child-Pugh class C (miR-26a Cut-off fold change at ≤0.4, Sensitivity: 84.62%, Specificity: 89.36%, P<0.0001; miR-21 Cut-off fold change at ≤0.6, Sensitivity: 84.62%, Specificity: 78.72%, P<0.0001). Our results indicate that the circulating levels of miR-26a and miR-21 are closely related to the extent of liver decompensation, and the decreased levels are capable of discriminating patients with cirrhosis at Child-Pugh class C from the whole cirrhosis cases.

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