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Critical Care Explorations Jul 2024Amid the COVID-19 pandemic, this study delves into ventilator shortages, exploring simple split ventilation (SSV), simple differential ventilation (SDV), and... (Comparative Study)
Comparative Study
CONTEXT
Amid the COVID-19 pandemic, this study delves into ventilator shortages, exploring simple split ventilation (SSV), simple differential ventilation (SDV), and differential multiventilation (DMV). The knowledge gap centers on understanding their performance and safety implications.
HYPOTHESIS
Our hypothesis posits that SSV, SDV, and DMV offer solutions to the ventilator crisis. Rigorous testing was anticipated to unveil advantages and limitations, aiding the development of effective ventilation approaches.
METHODS AND MODELS
Using a specialized test bed, SSV, SDV, and DMV were compared. Simulated lungs in a controlled setting facilitated measurements with sensors. Statistical analysis honed in on parameters like peak inspiratory pressure (PIP) and positive end-expiratory pressure.
RESULTS
Setting target PIP at 15 cm H2O for lung 1 and 12.5 cm H2O for lung 2, SSV revealed a PIP of 15.67 ± 0.2 cm H2O for both lungs, with tidal volume (Vt) at 152.9 ± 9 mL. In SDV, lung 1 had a PIP of 25.69 ± 0.2 cm H2O, lung 2 at 24.73 ± 0.2 cm H2O, and Vts of 464.3 ± 0.9 mL and 453.1 ± 10 mL, respectively. DMV trials showed lung 1's PIP at 13.97 ± 0.06 cm H2O, lung 2 at 12.30 ± 0.04 cm H2O, with Vts of 125.8 ± 0.004 mL and 104.4 ± 0.003 mL, respectively.
INTERPRETATION AND CONCLUSIONS
This study enriches understanding of ventilator sharing strategy, emphasizing the need for careful selection. DMV, offering individualization while maintaining circuit continuity, stands out. Findings lay the foundation for robust multiplexing strategies, enhancing ventilator management in crises.
Topics: Humans; Respiration, Artificial; COVID-19; Ventilators, Mechanical; Tidal Volume; SARS-CoV-2; Positive-Pressure Respiration
PubMed: 38916647
DOI: 10.1097/CCE.0000000000001113 -
Frontiers in Medicine 2024Fetuses with growth abnormalities are at an increased risk of adverse neonatal outcomes. The aim of this study was to investigate if placental growth factor (PlGF),...
INTRODUCTION
Fetuses with growth abnormalities are at an increased risk of adverse neonatal outcomes. The aim of this study was to investigate if placental growth factor (PlGF), soluble fms-like tyrosine kinase-1 (sFlt-1), or the sFlt-1/PlGF ratio were efficient predictive factors of adverse neonatal outcomes in small-for-gestational-age (SGA) newborns.
METHODS
A prospective observational multicenter cohort study was performed between 2020 and 2023. At the time of the SGA fetus diagnosis, serum angiogenic biomarker measurements were performed. The primary outcome was an adverse neonatal outcome, diagnosed in the case of any of the following: <34 weeks of gestation: mechanical ventilation, sepsis, necrotizing enterocolitis, intraventricular hemorrhage grade III or IV, and neonatal death before discharge; ≥34 weeks of gestation: Neonatal Intensive Care Unit hospitalization, mechanical ventilation, continuous positive airway pressure, sepsis, necrotizing enterocolitis, intraventricular hemorrhage grade III or IV, and neonatal death before discharge.
RESULTS
In total, 192 women who delivered SGA newborns were included in the study. The serum concentrations of PlGF were lower, leading to a higher sFlt-1/PlGF ratio in the adverse outcome group. No significant differences in sFlt-1 levels were observed between the groups. Both PlGF and sFlt-1 had a moderate correlation with adverse neonatal outcomes (PlGF: R - 0.5, < 0.001; sFlt-1: 0.5, < 0.001). The sFlt-1/PlGF ratio showed a correlation of 0.6 ( < 0.001) with adverse outcomes. The uterine artery pulsatility index (PI) and the sFlt-1/PlGF ratio were identified as the only independent risk factors for adverse outcomes. An sFlt-1/PlGF ratio of 19.1 exhibited high sensitivity (85.1%) but low specificity (35.9%) in predicting adverse outcomes and had the strongest correlation with them. This ratio allowed the risk of adverse outcomes to be assessed as low with approximately 80% certainty.
DISCUSSION
The sFlt-1/PlGF ratio seems to be an efficient predictive tool in adverse outcome risk assessment. More studies on large cohorts of SGA-complicated pregnancies with and without preeclampsia are needed to develop an optimal and detailed formula for the risk assessment of adverse outcomes in SGA newborns.
PubMed: 38915764
DOI: 10.3389/fmed.2024.1414381 -
Health Science Reports Jun 2024Marital status has been shown to be associated with mortality, but evidence in critically ill elder intensive care unit (ICU) patients with cerebrovascular diseases...
BACKGROUND AND AIMS
Marital status has been shown to be associated with mortality, but evidence in critically ill elder intensive care unit (ICU) patients with cerebrovascular diseases (CeVD) is limited. This study was to explore the correlation between marital status and the prognosis of patients with CeVD aged 65 years and over in the ICU.
METHODS
In the present study, 3564 patients were enrolled in the Medical Information Mart for Intensive Care IV database (version 2.2). Patients were divided into four groups based on marital status: married, single, divorced, and widowed. The primary outcome was all-cause mortality as patients were followed up for 3-, 6-, 9-, and 12-month. All-cause mortality risk for patients with different marital status was compared. Univariate and multivariable logistic regression analyses, survival curves and stratified analyses were performed to determine the correlation between marital status and mortality in critically ill patients with CeVD aged ≥65 years.
RESULTS
Of the patients, 51.2% (1825/3564) were married, followed by 23.8% (847/3564) were widowed, 18.2% (647/3564) were single, and 6.9% (245/3567) were divorced. Compared with the married, the unmarried had a higher proportion of female ( < 0.001), older ( < 0.001), and less proportion of mechanical ventilation ( = 0.045). Multivariate analyses showed that no differences were observed for mortality risk among different marital statuses ( > 0.05), while at late follow-up, widowed had a significance higher mortality risk than the married (9-month: odds ratio [OR]: 1.30, 95% confidence interval [CI]: 1.05-1.61, = 0.02; 12-month: OR: 1.38, 95% CI: 1.12-1.71, = 0.003). Stratified analyses indicated a stable correlation between marital status and 12-month mortality rate in sub-analysis for gender ( = 0.46) and age ( = 0.35).
CONCLUSION
Marital status is associated with long-term prognosis in older patients with CeVD admitted to ICU. Widowed people should receive more societal attention irrespective of sex or age.
PubMed: 38915359
DOI: 10.1002/hsr2.2177 -
Journal of Intensive Care Jun 2024Difficult-to-wean patients, typically identified as those failing the initial spontaneous breathing trial (SBT), face elevated mortality rates. Pendelluft, frequently...
BACKGROUND
Difficult-to-wean patients, typically identified as those failing the initial spontaneous breathing trial (SBT), face elevated mortality rates. Pendelluft, frequently observed in patients experiencing SBT failure, can be conveniently detected through bedside monitoring with electrical impedance tomography (EIT). This study aimed to explore the impact of pendelluft during SBT on difficult-to-wean patients.
METHODS
This retrospective observational study included difficult-to-wean patients undergoing spontaneous T piece breathing, during which EIT data were collected. Pendelluft occurrence was defined when its amplitude exceeded 2.5% of global tidal impedance variation. Physiological parameters during SBT were retrospectively retrieved from the EIT Examination Report Form. Other clinical data including mechanical ventilation duration, length of ICU stay, length of hospital stay, and 28-day mortality were retrieved from patient records in the hospital information system for each subject.
RESULTS
Pendelluft was observed in 72 (70.4%) of the 108 included patients, with 16 (14.8%) experiencing mortality by day 28. The pendelluft group exhibited significantly higher mortality (19.7% vs. 3.1%, p = 0.035), longer median mechanical ventilation duration [9 (5-15) vs. 7 (5-11) days, p = 0.041] and shorter ventilator-free days at day 28 [18 (4-22) vs. 20 (16-23) days, p = 0.043]. The presence of pendellfut was independently associated with increased mortality at day 28 (OR = 10.50, 95% confidence interval 1.21-90.99, p = 0.033).
CONCLUSIONS
Pendelluft occurred in 70.4% of difficult-to-wean patients undergoing T piece spontaneous breathing. Pendelluft was associated with worse clinical outcomes, including prolonged mechanical ventilation and increased mortality in this population. Our findings underscore the significance of monitoring pendelluft using EIT during SBT for difficult-to-wean patients.
PubMed: 38915067
DOI: 10.1186/s40560-024-00737-z -
Scientific Reports Jun 2024Normally aerated lung tissue on computed tomography (CT) is correlated with static respiratory system compliance (C) at zero end-expiratory pressure. In clinical...
Normally aerated lung tissue on computed tomography (CT) is correlated with static respiratory system compliance (C) at zero end-expiratory pressure. In clinical practice, however, patients with acute respiratory failure are often managed using elevated PEEP levels. No study has validated the relationship between lung volume and tissue and C at the applied positive end-expiratory pressure (PEEP). Therefore, this study aimed to demonstrate the relationship between lung volume and tissue on CT and C during the application of PEEP for the clinical management of patients with acute respiratory distress syndrome due to COVID-19. Additionally, as a secondary outcome, the study aimed to evaluate the relationship between CT characteristics and C, considering recruitability using the recruitment-to-inflation ratio (R/I ratio). We analyzed the CT and respiratory mechanics data of 30 patients with COVID-19 who were mechanically ventilated. The CT images were acquired during mechanical ventilation at PEEP level of 15 cmHO and were quantitatively analyzed using Synapse Vincent system version 6.4 (Fujifilm Corporation, Tokyo, Japan). Recruitability was stratified into two groups, high and low recruitability, based on the median R/I ratio of our study population. Thirty patients were included in the analysis with the median R/I ratio of 0.71. A significant correlation was observed between C at the applied PEEP (median 15 [interquartile range (IQR) 12.2, 15.8]) and the normally aerated lung volume (r = 0.70 [95% CI 0.46-0.85], P < 0.001) and tissue (r = 0.70 [95% CI 0.46-0.85], P < 0.001). Multivariable linear regression revealed that recruitability (Coefficient = - 390.9 [95% CI - 725.0 to - 56.8], P = 0.024) and C (Coefficient = 48.9 [95% CI 32.6-65.2], P < 0.001) were significantly associated with normally aerated lung volume (R-squared: 0.58). In this study, C at the applied PEEP was significantly correlated with normally aerated lung volume and tissue on CT. Moreover, recruitability indicated by the R/I ratio and C were significantly associated with the normally aerated lung volume. This research underscores the significance of C at the applied PEEP as a bedside-measurable parameter and sheds new light on the link between recruitability and normally aerated lung.
Topics: Humans; COVID-19; Positive-Pressure Respiration; Male; Female; Aged; Lung; Middle Aged; Tomography, X-Ray Computed; SARS-CoV-2; Respiratory Mechanics; Respiratory Distress Syndrome; Lung Compliance; Aged, 80 and over
PubMed: 38914620
DOI: 10.1038/s41598-024-64622-3 -
Annals of Translational Medicine Jun 2024Hypophosphatemia has been reported to impair diaphragmatic function in patients with chronic obstructive pulmonary disease (COPD). However, little is known about the...
Assessment of phosphatemia at admission to the intensive care unit to predict mechanical ventilation among patients with acute exacerbation of chronic obstructive pulmonary disease: a retrospective cohort study.
BACKGROUND
Hypophosphatemia has been reported to impair diaphragmatic function in patients with chronic obstructive pulmonary disease (COPD). However, little is known about the role of dysphosphatemia at admission [plasmatic phosphate concentration at intensive care unit (ICU) admission (T0-Ph)] to the ICU and respiratory outcomes among patients with severe acute COPD exacerbation. We aimed to assess the value of T0-Ph as a predictive factor of invasive mechanical ventilation (MV) during ICU stay.
METHODS
We retrospectively included consecutive patients admitted to the ICU for a severe acute exacerbation of COPD between May 2015 and December 2018. Logistic multivariate regression analysis was performed to identify association between T0-Ph and the need for invasive MV during the ICU stay.
RESULTS
We included 198 patients of whom 132 (67%) were male. The median age was 70 [interquartile range (IQR), 61-77] years. Nine (4.5%) patients died in the ICU. Median T0-Ph was significantly higher among patients requiring invasive MV as compared to non-intubated patients [1.23 (IQR, 1.07-1.41) and 1.09 (IQR, 0.91-1.27) mmol/L; P=0.005]. By multivariate analysis, pneumonia [odds ratio (OR) =6.42; 95% confidence interval (CI): 2.78-15.96; P<0.0001) and a history of intubation (OR =3.33; 95% CI: 0.97-11.19; P=0.05) were independently associated with the need for invasive MV, whereas T0-Ph was not (OR =1.75; 95% CI: 0.72-4.44; P=0.22).
CONCLUSIONS
T0-Ph was significantly higher in patients requiring invasive MV. However, T0-Ph was not associated with the need for invasive MV in multivariate analysis.
PubMed: 38911553
DOI: 10.21037/atm-23-1650 -
Proceedings (Baylor University. Medical... 2024Variceal and nonvariceal upper gastrointestinal bleeding (VUGIB and NVUGIB, respectively) require prompt intervention. Existing studies offer limited insight into the...
Impact of interhospital transfer status on outcomes of variceal and nonvariceal upper gastrointestinal bleeding: insights from the National Inpatient Sample analysis, 2017 to 2020.
BACKGROUND
Variceal and nonvariceal upper gastrointestinal bleeding (VUGIB and NVUGIB, respectively) require prompt intervention. Existing studies offer limited insight into the impact of interhospital transfers on patients with VUGIB and NVUGIB.
METHODS
We conducted a retrospective study using the US National Inpatient Sample database from 2017 to 2020. The outcomes included in-hospital mortality, incidence of complications, procedural performance, and resource utilization.
RESULTS
A total of 28,275 VUGIB and 781,370 NVUGIB adult patients were included. Transferred VUGIB and NVUGIB patients, when compared to nontransferred ones, demonstrated higher inpatient mortality (adjusted odds ratio [AOR] 1.49 and 1.86, < 0.05). Patients with VUGIB and NVUGIB had a higher likelihood of acute kidney injury requiring dialysis (AOR 3.79 and 1.76, respectively, = 0.01), vasopressor requirement (AOR 2.13 and 2.37, respectively, < 0.01), need for mechanical ventilation (AOR 1.73 and 2.02, respectively, < 0.01), and intensive care unit admission (AOR 1.76 and 2.01, respectively, < 0.01). Compared to their nontransferred counterparts, transferred VUGIB patients had a higher rate of undergoing transjugular intrahepatic portosystemic shunt (AOR 3.26, 95% CI 1.92-5.54, < 0.01), while transferred NVUGIB patients had a higher rate of interventional radiology-guided embolization (AOR 2.01, 95% CI 1.73-2.34, < 0.01) and endoscopic hemostasis (AOR 1.10, 95% CI 1.05-1.15, < 0.01).
CONCLUSION
Interhospital transfer is associated with worse clinical outcomes and higher resource utilization for VUGIB and NVUGIB patients.
PubMed: 38910813
DOI: 10.1080/08998280.2024.2347150 -
Proceedings (Baylor University. Medical... 2024The available literature indicates a link between SARS-CoV-2 infection during pregnancy and a heightened probability of experiencing negative outcomes for both the...
BACKGROUND
The available literature indicates a link between SARS-CoV-2 infection during pregnancy and a heightened probability of experiencing negative outcomes for both the pregnant patient and the developing fetus. We compared clinical outcomes of pregnant patients with or without COVID-19 hospitalized during delivery.
METHODS
Multivariate logistic regression analysis was used to compare outcomes and was adjusted for patient-related, hospital-related, and illness severity indicators.
RESULTS
We identified a total of 3,447,771 pregnant patients admitted between January 1, 2020 and December 31, 2020; 1.3% (n = 46,050) had COVID-19. COVID-19-positive patients had higher rates of in-hospital mortality (0.15% vs 0.05%, adjusted odds ratio [aOR] 5.97, 95% confidence interval [CI] 2.5-14.25, < 0.001), mechanical ventilation (0.9% vs 0.05%, aOR 14.2, 95% CI 10.7-18.76, < 0.001), vasopressor use (0.26% vs 0.14%, aOR 1.47, 95% CI 1.07-2.02, = 0.01), and perinatal maternal complications like preeclampsia (9.66% vs 7.04%, aOR 1.29, 95% CI 1.2-1.39, < 0.001) and hemolysis, elevated liver enzymes, and low platelet count (HELLP) syndrome (0.53% vs 0.26%, aOR 1.93, 95% CI 1.43-2.61, < 0.001) than COVID-19-negative patients.
DISCUSSION
Clinicians should be aware of the heightened risk of complications in pregnant patients with COVID-19 and consider strategies to mitigate them.
PubMed: 38910793
DOI: 10.1080/08998280.2024.2347738 -
Proceedings (Baylor University. Medical... 2024infection (CDI) burdens hospitalized patients, particularly those with comorbidities. Colon cancer may worsen CDI severity and outcomes. We aimed to assess CDI outcomes...
BACKGROUND AND AIM
infection (CDI) burdens hospitalized patients, particularly those with comorbidities. Colon cancer may worsen CDI severity and outcomes. We aimed to assess CDI outcomes in hospitalized colon cancer patients.
METHODS
A retrospective analysis of 2016 to 2020 National Inpatient Survey data identified adults with CDI, categorized by the presence of colon cancer. Hospitalization characteristics, comorbidities, and outcomes were compared between groups. Primary outcomes included in-hospital mortality, length of stay, and total hospital charges. The secondary outcomes were CDI complications. Multivariate logistic regression analysis was performed, with values ≤0.05 indicating statistical significance.
RESULTS
Among 1,436,860 CDI patients, 14,085 had colon cancer. Patients with colon cancer had a longer length of stay (10.77 vs 9.98 days; < 0.001). After adjustment for confounders, colon cancer patients exhibited higher odds of acute peritonitis (adjusted odds ratio [aOR] 2.37; = 0.009), bowel perforation (aOR 5.49; < 0.001), paralytic ileus (aOR 2.12; = 0.003), and colectomy (aOR 36.99; < 0.001), but lower risks of mortality, sepsis, septic shock, acute kidney injury, cardiac arrest, and mechanical ventilation (all < 0.001).
CONCLUSION
Colon cancer significantly impacts CDI outcomes in hospitalized patients, highlighting the need for improved management strategies to reduce morbidity and mortality.
PubMed: 38910791
DOI: 10.1080/08998280.2024.2352817 -
Cureus May 2024Introduction The acute gastrointestinal injury (AGI) score was proposed by the Working Group on Abdominal Problems of the European Society of Intensive Care Medicine...
Introduction The acute gastrointestinal injury (AGI) score was proposed by the Working Group on Abdominal Problems of the European Society of Intensive Care Medicine (ESICM) as a tool to define and grade gut dysfunction. There have not been any studies in India to validate this tool. The objective of this preliminary study was primarily to study the frequency of AGI in the first week of ICU stay in critically ill patients in our intensive care unit (ICU). We also sought to determine the risk factors predisposing to the development of AGI and to determine the prognostic implication of gastrointestinal (GI) injury in critically ill patients. Materials and methods A prospective, observational, preliminary, single-center study was conducted on critically ill patients (APACHE II > 8) who were on enteral tube feeds and admitted to a mixed ICU of a tertiary care hospital. Anthropometric data, admission diagnosis, APACHE II score, and comorbidities were recorded. Data of daily heart rate, mean arterial pressure, dose of vasopressors, intra-abdominal pressure, fluid balance, feeding intolerance, mechanical ventilation, and laboratory tests were noted for the first seven days of ICU stay or till ICU discharge, whichever was earlier. The occurrence of AGI score (1-4) during the first seven days of critical illness was the primary outcome of interest. Patient outcome at 28 days was recorded and the impact of the occurrence of AGI on patient outcome was analyzed using the Chi-square test. The patient characteristics associated with AGI were characterized as risk factors and analyzed using a multivariate model. Results Data were collected from 33 patients over 201 patient days. The frequency of acute GI dysfunction in the first seven days of ICU stay in our group of patients was 45.45% (15/33). APACHE II, fluid balance, creatinine, and lactate were identified as possible predictors of GI injury based on existing literature. These four variables were entered into an ordinal logistic regression model to assess their ability to predict the occurrence of GI Injury. When fitted into a predictive model, only fluid balance and creatinine were predictive of the final model (p-value < 0.05). A greater fluid balance was predictive in the final model of the development of GI injury; however, it showed negligible clinical significance (OR: 1.00033, 95% CI: 1.000051-1.00061). Lower creatinine levels were predictive in the final model of the development of AGI Injury, as demonstrated by the negative coefficient. Creatinine also had a greater clinical significance (OR: 0.63, 95% CI: 0.44-0.90) in the development of AGI. The impact of the AGI scores on mortality was analyzed. The number of patient days with higher AGI scores was significantly associated with increased mortality at 28 days (p-value < 0.001). Conclusion The study showed that nearly half of the critically ill patients included in the study developed acute GI dysfunction. We could not identify any predictors of GI injury based on our results. The result suggested an association between the severity of GI dysfunction and mortality at 28 days.
PubMed: 38910699
DOI: 10.7759/cureus.60903