Acute Pulmonary Disease Research Articles

Predictive value of the CURB-65, qSOFA, and APACHE II for in-hospital mortality in patients with acute exacerbation chronic obstructive pulmonary disease.

This study aimed to evaluate the efficacy of Quick Sequential Organ Failure Assessment, Confusion, Urea, Respiratory Rate, Blood Pressure, and Age Above or Below 65 Years (CURB-65), and Acute Physiology and Chronic Health Evaluation (APACHE) II in predicting the in-hospital mortality of patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). This retrospective study was conducted on 1583 hospitalized patients diagnosed with AECOPD from 2017 to 2019. Appropriate clinical data were retrieved from medical records from the time of admission up until the patients were discharged. The patients' most severe physiological condition and laboratory data within the first 24 hours of admission were used to determine CURB-65, Quick Sequential Organ Failure Assessment, and APACHE II scores. The accuracy of these 3 instruments in predicting the in-hospital mortality of patients with AECOPD was compared. It was observed that patients who had died had significantly higher APACHE II and CURB-65 scores (P < .05). Binary logistic regression analysis confirmed their significant association with mortality. The APACHE II score had a sensitivity of 91.6% and a specificity of 89.2%, while CURB-65 had a sensitivity of 94% and a specificity of 67.2%. The receiver operating characteristic curves for APACHE II and CURB-65 showed high predictive accuracy (area under the curve, 0.965 and 0.882, P < .001), respectively. Mortality rates substantially increased with higher scores (P < .001), reaching 38.2% for APACHE II scores ≥16 and 15.8% for CURB-65 scores ≥2. Our findings reveal a clear link between higher mortality rates and higher APACHE II and CURB-65 scores. The receiver operating characteristic curves' strong predictive ability highlights the dependability of these scoring systems in assessing the risk of in-hospital mortality, making them useful tools for predicting the outcomes in critical care.

A high-flow nasal cannula versus noninvasive ventilation in acute exacerbations of chronic obstructive pulmonary disease

PurposeWe investigated the efficacy and safety of a high-flow nasal cannula (HFNC) at different flow rates compared to noninvasive ventilation (NIV) in patients with acute chronic obstructive pulmonary disease (COPD) exacerbations. MethodsThis prospective, randomized, single-blind study assigned patients to one of three study groups. The NIV group (n = 47) received bilevel positive airway pressure. The HFNC-30 (n = 44) and HFNC-50 (n = 46) groups received HFNC therapy at flow rates of 30 and 50 L/min, respectively. Demographic and clinical characteristics and arterial blood gas parameters before and 30, 60, and 120 min after treatment were compared among the treatment groups. ResultsThis study included 137 consecutive patients with acute exacerbations of COPD, comprising 90 males and 47 females, with a mean age of 68.1 ± 10.5 years. A total of 21 patients (15.33 %) were intubated, and the overall mortality rate was 10.2 %. The mean PaCO2 levels on admission were 64.69 ± 10.81, 61.51 ± 9.03, and 62.29 ± 9.87 in the NIV, HFNC-30, and HFNC-50 groups, respectively, with no significant differences observed (p = 0.372). A significant reduction in mean PaCO2 was observed in all treatment groups at 30, 60, and 120 min (p < 0.05 for all). However, the ΔPaCO2 at 60 min was significantly higher in the HFNC-30 group compared to the NIV group (p = 0.042). Additionally, neither intubation rates nor 28-day mortality differed among the treatment groups (p = 0.368 and p = 0.775, respectively). ConclusionHFNC was not inferior to NIV in improving arterial blood gas parameters, particularly PaCO2 in patients with COPD exacerbations, especially those with hypercarbia. Moreover, HFNC at a flow rate of 30 L/min was superior to NIV for reducing PaCO2 levels at 60 min. Trial RegistryNational Library of Medicine Clinical Trial Registry; No.: NCT06495086; URL: https://clinicaltrials.gov/study/NCT06495086

Acute lung pathology in the immunocompromised child.

Children with compromised immune systems, whether due to primary or secondary immunodeficiencies, are susceptible to a broad spectrum of acute intrathoracic pathologies. These include infections, pulmonary edema, and malignancies. Pulmonary issues are common and perilous in this population, necessitating prompt and precise diagnosis for effective management. This review aims to provide an overview of such conditions, focusing on the imaging appearances of the most prevalent acute lung conditions affecting immunocompromised children. It emphasizes the critical importance of an integrated clinical and radiological approach when diagnosing these acute pulmonary disease states.

Clinical Characteristics of Overweight Patients With Acute Exacerbation Chronic Obstructive Pulmonary Disease (AECOPD).

Low body weight in patients with COPD is associated with a poor prognosis and more comorbidities. However, the impact of increased body weight in patients with COPD remains controversial. The aim of this study was to explore the clinical features of overweight patients with AECOPD. In this multicenter cross-sectional study, a total of 647 AECOPD patients were recruited. Finally, 269 normal weight and 162 overweight patients were included. Baseline characteristics and clinical and laboratory data were collected. The least absolute shrinkage and selection operator (LASSO) regression was performed to determine potential features, which were substituted into binary logistic regression to reveal overweight-associated clinical features. The nomogram and its associated curves were established to visualize and verify the logistic regression model. Six potential overweight-associated variables were selected by LASSO regression. Subsequently, a binary logistic regression model identified that the rates of type 2 diabetes (T2DM) and hypertension and levels of lymphocytes (LYM)%, and alanine aminotransferase (ALT) were independent variables of overweight in AECOPD patients. The C-index and AUC of the ROC curve of the nomogram were 0.671 and 0.666, respectively. The DCA curve revealed that the nomogram had more clinical benefits if the threshold was at a range of 0.22~0.78. Collectively, we revealed that T2DM and hypertension were more common, and LYM% and ALT were higher in AECOPD patients with overweight than those with normal weight. The result suggests that AECOPD patients with overweight are at risk for additional comorbidities, potentially leading to worse outcomes.

Comparison of Clinical Outcomes Between Acetylcysteine and Ambroxol in Post Acute Exacerbation of COPD Patients

Literature studies show that the use of acetylcysteine or ambroxol can accelerate improvement of clinical outcomes of post acute exacerbation chronic obstructive pulmonary disease (AECOPD) patients. This study aims to compare the clinical outcomes of acetylcysteine and ambroxol administration in post AECOPD patients. The study was cohort design, prospective, to comparison of clinical outcomes of acetylcysteine and ambroxol with post AECOPD outpatients  coming for clinical chekups in August 2023 at Respira Lung Hospital Yogyakarta. Clinical outcomes parameters were observed on day zero and thirty for CAT score and day zero and four for cough score. The patients were categorized into two groups: acetylcysteine group (n=30) and ambroxol group (n=30). There was no significant difference between two  groupsto change of CAT score and cough score (p&gt;0.05) post AECOPD. The acetylcysteine group compared to ambroxol, there was a mean decrease in morning cough score -1.10±1.11 vs -0.87±1.12 (p=0.228), night cough score -1.53±1.43 vs -1.13±1.31 (p=0.438), and CAT score -2.43±5.45 vs -2.90±3.41 (p=0.391). Providing additional therapy of acetylcysteine or ambroxol in this study did not significantly reducing cough scores and CAT scores in post AECOPD patients.

Case-control study on post-COVID-19 conditions reveals severe acute infection and chronic pulmonary disease as potential risk factors

Post-COVID-19 conditions (long COVID) has impacted many individuals, yet risk factors for this condition are poorly understood. This retrospective analysis of 88,943 COVID-19 patients at a multi-state US health system compares phenotypes, laboratory tests, medication orders, and outcomes for 1,086 long-COVID patients and their matched controls. We found that history of chronic pulmonary disease (CPD) (odds ratio: 1.9, 95% CI: [1.5, 2.6]), migraine (OR: 2.2, [1.6, 3.1]), and fibromyalgia (OR: 2.3, [1.3, 3.8]) were more common for long-COVID patients. During the acute infection phase long COVID patients exhibited high triglycerides, low HDL cholesterol, and a high neutrophil-lymphocyte ratio; and were more likely hospitalized (5% vs. 1%). Our findings suggest severity of acute infection and history of CPD, migraine, chronic fatigue syndrome (CFS), or fibromyalgia as risk factors for long COVID. These results suggest that suppressing acute disease severity proactively, especially in patients at high risk, can reduce incidence of long COVID.

A Structural Equation Model of the Relationship Between Symptom Burden, Psychological Resilience, Coping Styles, Social Support, and Psychological Distress in Elderly Patients With Acute Exacerbation Chronic Obstructive Pulmonary Disease in China

PurposeThe prevalence of psychological distress is frequently observed among old adults with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). However, current researches are insufficient to clarify the correlation among these relevant factors. This study examined the effects of symptom burden, psychological resilience, coping styles and socialsupporton psychological distress Methods255 elderly patients with AECOPD were conveniently selected in Taian, Shandong Province. The General Information Questionnaire, Distress Thermometer, The Revised Memorial Symptom Assessment Scale, Connor-Davidson Resilience Scale, Simplified Coping Style Questionnaire, Perceived Social Support Scale were used to investigate. The relationship among factors was estimated by using a structural equation model ResultsPsychological distress score of elderly patients with AECOPD was (5.25±1.01); coping styles, psychological resilience, symptom burden, social support directly affected psychological distress (the direct effects were -0.934, 0.174, 0.169 and -0.086); coping styles had the largest total effect on psychological distress (the total effect was -0.934); psychological resilience indirectly affected psychological distress through coping styles (the indirect effect was -0.743); symptom burden indirectly affected psychological distress through psychological resilience (the indirect effect was 0.254); social support indirectly affected psychological distress through symptom burden, psychological resilience, and coping styles (the indirect effect was -0.799) ConclusionThe psychological distress of elderly patients with AECOPD is at a moderate level; coping styles, psychological resilience and social support have positive effects on alleviating the psychological distress of elderly patients with AECOPD; symptom burden is negatively correlated with psychological distress. Healthcare professionals should pay more attention to elderly patients with AECOPD who are particularly prone to experiencing higher levels of psychological distress, especially in the presence of low coping style, limited psychological resilience, inadequate levels of social support, and high symptom burden.

Determination of predisposing factors for prolonged intensive care in patients with exacerbation of chronic obstructive pulmonary disease

Objective: To determine the predisposing factors for lengthy intensive care unit stay of chronic obstructive pulmonary disease patients with acute exacerbation. Method: The retrospective study was conducted after approval from the ethics review committee of Atatürk Sanatorium Training and Research Hospital, Turkey, and comprised data from January 1, 2017, to August 31, 2022, related to acute exacerbation chronic obstructive pulmonary disease patients receiving intensive care unite treatment. Demographics, comorbidities, treatment, length of stay in hospital and in intensive care unit, and nutritional status were evaluated. Data of patients who spent &lt;10 days in intensive care unit formed Group 1, while those having spent 10 days or more formed Group 2 for comparison purposes. Data was analysed using SPSS 22. Results: Of the 460 patients, 366(79.6%) were in Group 1; 224(61.2%) males and 64(38.8%) females with mean age 70.81±11.57 years. There were 94(20.4%) patients in Group 2; 62(66%) males and 32(34%) females with mean age 72.38±10.88 years (p&gt;0.05). Inotropic agent support, need for haemodialysis, timeframe of invasive mechanical ventilation, length of stay in hospital, 1-month mortality, antibiotic use, use of diuretic agent, acute physiology and chronic health evaluation-ii score, nutrition risk in the critically ill score, history of lung malignancy, and pneumonic infiltration on chest radiograph were significantly more frequenttly observed in Group 2 patients (p&lt;0.05). Age, timeframe of invasive mechanical ventilation, and length of stay in hospital were the factors prolonging intensive care unit stay (p&lt;0.05). Conclusion: Higher age, longer invasive mechanical ventilation timeframe and hospital stay with acute exacerbation chronic obstructive pulmonary disease caused a prolonged stay in intensive care unit. Key Words: Acute exacerbation of chronic obstructive pulmonary disease, Mechanical ventilation time, Prolonged intensive care stay, Prolonged hospitalisation.

Continuous estimation of respiratory system compliance and airway resistance during pressure-controlled ventilation without end-inspiration occlusion

BackgroundAssessing mechanical properties of the respiratory system (Cst) during mechanical ventilation necessitates an end-inspiration flow of zero, which requires an end-inspiratory occlusion maneuver. This lung model study aimed to observe the effect of airflow obstruction on the accuracy of respiratory mechanical properties during pressure-controlled ventilation (PCV) by analyzing dynamic signals.MethodsA Hamilton C3 ventilator was attached to a lung simulator that mimics lung mechanics in healthy, acute respiratory distress syndrome (ARDS) and chronic obstructive pulmonary disease (COPD) models. PCV and volume-controlled ventilation (VCV) were applied with tidal volume (VT) values of 5.0, 7.0, and 10.0 ml/kg. Performance characteristics and respiratory mechanics were assessed and were calibrated by virtual extrapolation using expiratory time constant (RCexp).ResultsDuring PCV ventilation, drive pressure (DP) was significantly increased in the ARDS model. Peak inspiratory flow (PIF) and peak expiratory flow (PEF) gradually declined with increasing severity of airflow obstruction, while DP, end-inspiration flow (EIF), and inspiratory cycling ratio (EIF/PIF%) increased. Similar estimated values of Crs and airway resistance (Raw) during PCV and VCV ventilation were obtained in healthy adult and mild obstructive models, and the calculated errors did not exceed 5%. An underestimation of Crs and an overestimation of Raw were observed in the severe obstruction model.ConclusionUsing the modified dynamic signal analysis approach, respiratory system properties (Crs and Raw) could be accurately estimated in patients with non-severe airflow obstruction in the PCV mode.

Analysis of the total serum IgE levels in patients with acute exacerbations chronic obstructive pulmonary disease: A retrospective study.

Currently, few studies have demonstrated the relationship between total serum IgE (T-IgE) and acute exacerbation chronic obstructive pulmonary disease (AECOPD). In this study, T-IgE in AECOPD patients were investigated and jointly analyzed with the clinical characteristics. AECOPD patients hospitalized from July 2018 to July 2019 were included in this study. In this patient cohort, clinical information was investigated. Routine blood tests, C-reactive protein and T-IgE levels of patients were determined along with blood gas analysis. The length of hospital stays, mechanical ventilation during hospitalization, ICU admission, glucocorticoid related clinical information were recorded. A total of 285 AECOPD patients were included in this study, which consisted of a high proportion of males. Of all patients, 49.82% patients exhibited higher T-IgE levels. Based on the reference T-IgE value 60 kU/L, patients were divided into high T-IgE group with T-IgE > 60 kU/L, and low T-IgE group with T-IgE ≤ 60 kU/L. There was no significant difference in the dosage of glucocorticoid between the two groups. Patients in the high T-IgE group had shorter hospital stays and lower probability of mechanical ventilation compared to the low T-IgE group. After adjustment for confounding factors, T-IgE was negatively correlated with the length of hospital stays. AECOPD patients with elevated T-IgE had shorter hospital stays and lower risks of mechanical ventilation and ICU admission. Our results showed that T-IgE might play an important role on evaluating the condition and guiding for treatment decisions in AECOPD patients.

Epidemiological, clinical, and genomic landscape of coccidioidomycosis in northeastern Brazil

Coccidioidomycosis, listed as a priority mycosis by the WHO, is endemic in the United States but often overlooked in Central and South America. Employing a multi-institutional approach, we investigate how disease characteristics, pathogen genetic variation, and environmental factors impact coccidioidomycosis epidemiology and outcomes in South America. We identified 292 cases (1978–2021) and 42 outbreaks in Piauí and Maranhão states, Brazil, the largest series outside the US/Mexico epidemic zone. The male-to-female ratio was 57.4:1 and the most common activity was armadillo hunting (91.1%) 4 to 30 days before symptom onset. Most patients (92.8%) exhibited typical acute pulmonary disease, with cough (93%), fever (90%), and chest pain (77%) as predominant symptoms. The case fatality rate was 8%. Our negative binomial regression model indicates that reduced precipitation levels in the current (p = 0.015) and preceding year (p = 0.001) predict heightened incidence. Unlike other hotspots, acidic soil characterizes this region. Brazilian strains differ genomically from other C. posadasii lineages. Northeastern Brazil presents a distinctive coccidioidomycosis profile, with armadillo hunters facing elevated risks. Low annual rainfall emerges as a key factor in increasing cases. A unique C. posadasii lineage in Brazil suggests potential differences in environmental, virulence, and/or pathogenesis traits compared to other Coccidioides genotypes.

Determinants of Risk for Type 2 Diabetes Mellitus Among the Community at The Birobuli Community Health Center

To identify the determinants of risk for type 2 diabetes mellitus among the community at the Birobuli Community Health Center. Type of quantitative research with a case-control approach at a confidence level of 95%. The sample size was taken using the Slovin formula with a result of 76 people and a 1:1 ratio and using gender matching with a total sample of 152 people. Sampling was done using the purposive sampling technique. The data source used secondary data in the form of medical records and primary data in the form of interviews using questionnaires measuring physical activity, unhealthy eating patterns, and sleep quality with the criteria that a doctor diagnosed the respondent as suffering from Type 2 DM and not suffering from other types of Diabetes Mellitus (DM). Data analysis used the odds ratio test, the results showed that physical activity (OR=4.455 and CI=2.250-8.819), unhealthy eating patterns (OR=3.145 and CI=1.616-6.120), sleep quality (OR=5.444 and CI= 2,703 10,966), and dyslipidemia (OR=4,287 and CI=2,121-8,667) are determinants of the risk of Type 2 DM. It is suggested that health workers should improve health services at each Integrated Development Post (known as POSBINDU), an integrated monitoring and early detection activity for NCD risk factors (heart and blood vessel disease, diabetes, acute obstructive pulmonary disease, and cancer) as well as disorders due to accidents and acts of domestic violence which are managed by the community through integrated guidance, meanwhile, provide education on healthy lifestyles to overcome the incidence of DM

Transient Febrile reaction after Electroconvulsive Therapy : A case report in an adult man with Ultra-Resistant Schizophrenia

IntroductionElectroconvulsive therapy (ECT) is a therapeutic method that induces artificial seizure by electrical stimulation to resolve various psychiatric symptoms. ECT is particularly effective in resistant schizophrenia and may improve response to medication despite the presence of potential adverse side effects. Post-ECT delirium and Headaches are some of the most frequent side effects presented in literature. Fever is yet another unexplained reaction, however there are a few case reports and retrospective studies that report on it.ObjectivesWe aim to illustrate through a clinical case and a review of literature the prevalence of post ECT fever as well as the possible explanatory mechanisms.MethodsIn this study we report the case of a man with ultra-resistant schizophrenia who was treated successfully with ECT despite the development of transient febrile reaction and we present a review of literature on pubmed using the following key words : ECT, fever,resistant psychosis, mechanisms.Results Our patient is a 48-year-old man with a psychiatric history of schizophrenia evolving since the age of 34. He has a history of matricide in 2021 resulting in his hospitalisation in a forensic psychiatric ward. He underwent trials of classic and atypical antipsychotics that weren’t efficacious thus he was diagnosed with resistant schizophrenia in 2022. He was treated initially with clozapine 500 mg per day and then with the association (clozapine + amisulpride) yet it wasn’t effective on his persecutory delirium and fratricide ideas. Plus, there was no reduction in his PANSS (Positive and Negative Syndrome Scale) scores. The diagnosis of ultra-resistant schizophrenia was established. The staff indicated the adjunction of ECT to Clozapine. In the inpatient unit, hours after his fourth ECT session he developed a fever (40°C), his blood pressure (120/80 mm Hg), pulse(85 beats per minute),and respiratory rate(20 breaths per minute) were normal. Blood samples, including cultures, were drawn, which showed normal blood cell count and CPK(140U/L) but CRP was elevated (31 U/L), a chest x-ray showed no acute pulmonary disease, and his urinalysis result and Covid test were negative. His fever resolved then spontaneously after two hours. The same transient febrile reaction occurred again 3 times. It was postulated in literature that fever may be due to inadequate muscle reaction. Data also suggested the potential influence of ECT on the hypothalamus that is a key region in regulating body temperature.ConclusionsFurther studies are required in order to establish the real prevalence of this side effect and its possible causes.Disclosure of InterestNone Declared

Efficacy of Acupuncture in Acute Exacerbation ofChronic Obstructive Pulmonary Disease: A Systematic Review and Meta-Analysis.

The effect of acupuncture as adjunctive therapy for acute exacerbation of chronic obstructive pulmonary disease (AECOPD) was controversial. Thus, we aimed to evaluate the effects of acupuncture for treating AECOPD. Eight databases were searched from database inception to July 30, 2023. All RCTs compared acupuncture plus conventional western medicine with conventional western medicine alone were included. Outcomes were quality of life, lung function, blood oxygen condition, exercise capacity, daily symptoms, duration of hospitalization, and adverse events. The statistical analyses were conducted using Stata 17.0, and methodological quality was measured by the Cochrane bias risk assessment tool. The Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach was used to assess the quality of evidence. Twelve studies including 915 patients were included. Compared with conventional western medicine alone, acupuncture combined with conventional western therapy significantly improved quality of life (CAT: MD: -3.25; 95% CI: -3.73 to -2.78, P<0.001) and arterial blood gas (PaCO2: MD: -1.85; 95% CI: -2.74 to -0.95, P<0.001; PaO2: MD: 5.15; 95% CI: 1.22 to 9.07, P = 0.01). And for lung function, statistical benefits were found in FEV1/FVC (MD: 4.66; 95% CI: 2.21 to 7.12, P<0.001), but no difference was seen for FEV1% (MD: 1.83; 95% CI: -0.17 to 3.83, P = 0.073). There was no significant improvement in exercise capacity (6MWD: MD: 96.69; 95% CI: -0.60 to 193.98, P = 0.051), hospitalization duration (MD: -5.70; 95% CI: -11.97 to 0.58, P = 0.075), and dyspnea (mMRC: MD: -0.19; 95% CI: -0.61 to 0.63, P = 0.376) between two groups. Overall bias for CAT and mMRC was in "high" risk, FEV1%, FEV1/FVC, PaCO2, and PaO2 was in "some concern" and 1 RCT assessing hospitalization duration was in "low" risk. And the overall assessments were either moderate, low or very low certainty. Seven trials performed safety assessment of acupuncture, and no serious adverse events were reported. Acupuncture might have auxiliary effects on AECOPD. However, the quality of the evidence is limited, and more high-quality RCTs are needed to be performed in the future.

Multimodality imaging of acute and chronic pulmonary thromboembolic disease.

Pulmonary embolism (PE) is a pathological entity characterised by venous thromboembolism in the pulmonary arteries. It is a common entity in daily clinical practice and is the third most common cause of cardiovascular death. Correct diagnostic work-up is pivotal to ensure timely institution of appropriate therapy. This requires recognition of the characteristic imaging findings and awareness of the role and peculiarities of the different imaging techniques involved in the diagnostic and therapeutic process. This review aims to showcase the most commonly encountered imaging findings associated with pulmonary thromboembolism for each imaging modality, outline their advantages and disadvantages, and define the specific role of these techniques in the clinical setting. The latest innovations concerning the diagnostic work-up of PE will be also briefly discussed, yielding a perspective on the future developments and challenges that the radiologist will have to face in the coming years.

Inflammation as the nexus: exploring the link between acute myocardial infarction and chronic obstructive pulmonary disease.

Chronic obstructive pulmonary disease (COPD), particularly following acute exacerbations (AE-COPD), significantly heightens the risks and mortality associated with acute myocardial infarction (AMI). The intersection of COPD and AMI is characterised by a considerable overlap in inflammatory mechanisms, which play a crucial role in the development of both conditions. Although extensive research has been conducted on individual inflammatory pathways in AMI and COPD, the understanding of thrombo-inflammatory crosstalk in comorbid settings remains limited. The effectiveness of various inflammatory components in reducing AMI infarct size or slowing COPD progression has shown promise, yet their efficacy in the context of comorbidity with COPD and AMI is not established. This review focuses on the critical importance of both local and systemic inflammation, highlighting it as a key pathophysiological connection between AMI and COPD/AE-COPD.

Breath Markers of Oxidative Stress in Children with Severe Viral Lower Respiratory Tract Infection.

Severe viral lower respiratory tract infection (LRTI), resulting in both acute and long-term pulmonary disease, constitutes a substantial burden among young children. Viral LRTI triggers local oxidative stress pathways by infection and inflammation, and supportive care in the pediatric intensive care unit may further aggravate oxidative injury. The main goal of this exploratory study was to identify and monitor breath markers linked to oxidative stress in children over the disease course of severe viral LRTI. Exhaled breath was sampled during invasive ventilation, and volatile organic compounds (VOCs) were analyzed using gas chromatography and mass spectrometry. VOCs were selected in an untargeted principal component analysis and assessed for change over time. In addition, identified VOCs were correlated with clinical parameters. Seventy breath samples from 21 patients were analyzed. A total of 15 VOCs were identified that contributed the most to the explained variance of breath markers. Of these 15 VOCs, 10 were previously linked to pathways of oxidative stress. Eight VOCs, including seven alkanes and methyl alkanes, significantly decreased from the initial phase of ventilation to the day of extubation. No correlation was observed with the administered oxygen dose, whereas six VOCs showed a poor to strong positive correlation with driving pressure. In this prospective study of children with severe viral LRTI, the majority of VOCs that were most important for the explained variance mirrored clinical improvement. These breath markers could potentially help monitor the pulmonary oxidative status in these patients, but further research with other objective measures of pulmonary injury is required.

Divergent pathogenetic outcomes in BALB/c mice following Omicron subvariant infection

Following the emergence of B.1.1.529 Omicron, the SARS-CoV-2 virus evolved into a significant number of sublineage variants that possessed numerous mutations throughout the genome, but particularly within the spike glycoprotein (S) gene. For example, the BQ.1.1 and the XBB.1 and XBB.1.5 subvariants contained 34 and 41 mutations in S, respectively. However, these variants elicited largely replication only or mild disease phenotypes in mice. To better model pathogenic outcomes and measure countermeasure performance, we developed mouse adapted versions (BQ.1.1 MA; XBB.1 MA; XBB.1.5 MA) that reflect more pathogenic acute phase pulmonary disease symptoms of SARS-CoV-2, as well as derivative strains expressing nano-luciferase (nLuc) in place of ORF7 (BQ.1.1 nLuc; XBB.1 nLuc; XBB.1.5 nLuc). Amongst the mouse adapted (MA) viruses, a wide range of disease outcomes were observed including mortality, weight loss, lung dysfunction, and tissue viral loads in the lung and nasal turbinates. Intriguingly, XBB.1 MA and XBB.1.5 MA strains, which contained identical mutations throughout except at position F486S/P in S, exhibited divergent disease outcomes in mice (Ao et al., 2023). XBB.1.5 MA infection was associated with significant weight loss and ∼45 % mortality across two independent studies, while XBB.1 MA infected animals suffered from mild weight loss and only 10 % mortality across the same two independent studies. Additionally, the development and use of nanoluciferase expressing strains provided moderate throughput for live virus neutralization assays. The availability of small animal models for the assessment of Omicron VOC disease potential will enable refined capacity to evaluate the efficacy of on market and pre-clinical therapeutics and interventions.

Diagnosis and treatment of right ventricular failure secondary to acutely increased right ventricular afterload (acute cor pulmonale): a clinical consensus statement of the Association for Acute CardioVascular Care of the European Society of Cardiology.

Acute right ventricular failure secondary to acutely increased right ventricular afterload (acute cor pulmonale) is a life-threatening condition that may arise in different clinical settings. Patients at risk of developing or with manifest acute cor pulmonale usually present with an acute pulmonary disease (e.g. pulmonary embolism, pneumonia, and acute respiratory distress syndrome) and are managed initially in emergency departments and later in intensive care units. According to the clinical setting, other specialties are involved (cardiology, pneumology, internal medicine). As such, coordinated delivery of care is particularly challenging but, as shown during the COVID-19 pandemic, has a major impact on prognosis. A common framework for the management of acute cor pulmonale with inclusion of the perspectives of all involved disciplines is urgently needed.

Clinical study of NFNC in the treatment of acute exacerbation chronic obstructive pulmonary disease patients with respiratory failure

BACKGROUND Most patients with acute exacerbation chronic obstructive pulmonary disease (AECOPD) have respiratory failure that necessitates active correction and the improvement of oxygenation is particularly important during treatment. High flow nasal cannula (HFNC) oxygen therapy is a non-invasive respiratory aid that is widely used in the clinic that improves oxygenation state, reduces dead space ventilation and breathing effort, protects the loss of cilia in the airways, and improves patient comfort. AIM To compare HFNC and non-invasive positive pressure ventilation in the treatment of patients with AECOPD. METHODS Eighty AECOPD patients were included in the study. The patients were in the intensive care department of our hospital from October 2019 to October 2021. The patients were divided into the control and treatment groups according to the different treatment methods with 40 patients in each group. Differences in patient comfort, blood gas analysis and infection indices were analyzed between the two groups. RESULTS After treatment, symptoms including nasal, throat and chest discomfort were significantly lower in the treatment group compared to the control group on the 3rd and 5th days (P &lt; 0.05). Before treatment, the PaO2, PaO2/FiO2, PaCO2, and SaO2 in the two groups of patients were not significantly different (P &gt; 0.05). After treatment, the same indicators were significantly improved in both patient groups but had improved more in the treatment group compared to the control group (P &lt; 0.05). After treatment, the white blood cell count, and the levels of C-reactive protein and calcitonin in patients in the treatment group were significantly higher compared to patients in the control group (P &lt; 0.05). CONCLUSION HFNC treatment can improve the ventilation of AECOPD patients whilst also improving patient comfort, and reducing complications. HFNC is a clinically valuable technique for the treatment of AECOPD.