Assessment Of Pulmonary Function Research Articles

Neuromuscular Phrenic Nerve Ultrasound versus Nerve Conduction Study of Phrenic Nerve in Amyotrophic Lateral Sclerosis

Abstract Background Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron disorder that is, characterized by progressive loss of the upper (UMNs) and lower motor neurons (LMNs) at the spinal or bulbar level. In the most advanced stages, ALS patients will develop symptoms of dyspnea due to weakness of respiratory muscles and subsequently death in ALS. Objective To compare between neuromuscular ultrasound and nerve conduction study of phrenic nerve in the assessment of pulmonary function in Amyotrophic lateral sclerosis patients. Patients and Methods This was a case control study performed in Ain Shams University Hospitals in the period from 2/2022 to 8/2022. The study included 15 patients diagnosed with Amyotrophic lateral sclerosis according to El Escorial revised criteria and 15 healthy people served as controls. Patients were randomized by a simple computer generated method into two groups: A study group (n = 15) and a control group (n = 15). Results This study showed that PNCS is more sensitive than CSA in the assessment of respiratory affection in ALS. PNCS is simple and easy to do and doesn’t need a highly equipped device. Also PN amplitude has a normal value and many studies were done about it. To our knowledge no research studies this correlation between PN CSA and PN amplitude in the assessment of respiratory affection among ALS patients. Conclusion Electrodiagnosis and Neuromuscular ultrasound have a valuable role in the diagnosis and monitoring ALS patients. This study showed that PNCS is more sensitive than PN CSA by NMUS in the assessment of respiratory affection in ALS. PNCS is simple and easy to do and doesn’t need a highly equipped device. Also there were well established reference values as many researches studied electrophysiology of phrenic nerve.

Pulmonary function assessment among conventional and organic cotton farmers exposed to pesticides in the Central-West region of Burkina Faso.

Respiratory diseases have been associated with the exposure of populations to some environmental pollutants such as pesticides. To assess effects of pesticides on farmers' respiratory health, this study aimed to evaluate the pulmonary function of cotton farmers exposed to synthetic and natural pesticides in the Central-West region of Burkina Faso. A cross-sectional study was conducted from June to July 2022 among 281 conventional and 189 organic cotton farmers. After collecting information on pesticide use conditions, pulmonary function tests (PFTs) were performed on each farmer according to the American Thoracic Society/European Respiratory Society guidelines, in order to assess chronic respiratory effects among cotton producers. Binary logistic regression was used to assess factors associated with the occurrence of ventilatory changes. Both conventional and organic cotton farmers reported similar chronic respiratory symptoms in different proportions. The main reported were rhinitis (54.45% conventional vs. 34.92% organic), chest pains (41.28% conventional vs. 23.81% organic), cough (33.45% conventional, 24.34% organic), breathlessness (31.67% conventional, 4.23% organic) (p<0.05). 16.18% and 27.50% of conventional male and female cotton farmers, respectively, had a restrictive defect. Among organic cotton farmers, 15.85% and 18.69%, respectively, of males and females had a restrictive defect. Furthermore, a significant increase in the predicted average percentage of FEV1/FVC ratio was observed among organic cotton farmers after salbutamol's use (p = 0.039). The type of cultivated cotton was not associated with ventilatory changes neither in the univariate analysis, nor in the multivariate analysis. Other factors such as farmers' age, BMI and insecticides use frequency per year were also important. Farmers who used insecticides more than 6 times per season had an increased risk of developing an obstructive defect (OR = 1.603; 95%CI: 0.484-5.309) compared to those who used them 6 times or less. Chronic respiratory signs and ventilatory impairments were found among conventional and, to our knowledge, for the first time among organic cotton producers. However, these health effects were more prevalent among conventional cotton farmers than organic ones.

Cross-shift changes in pulmonary function and occupational exposure to particulate matter among e-waste workers in Ghana.

Little is known on the association between cross-shift changes in pulmonary function and personal inhalation exposure to particulate matter (PM) among informal electronic-waste (e-waste) recovery workers who have substantial occupational exposure to airborne pollutants from burning e-waste. Using a cross-shift design, pre- and post-shift pulmonary function assessments and accompanying personal inhalation exposure to PM (sizes <1, <2.5 μm, and the coarse fraction, 2.5-10 μm in aerodynamic diameter) were measured among e-waste workers (n = 142) at the Agbogbloshie e-waste site and a comparison population (n = 65) in Accra, Ghana during 2017 and 2018. Linear mixed models estimated associations between percent changes in pulmonary function and personal PM. Declines in forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) per hour were not significantly associated with increases in PM (all sizes) among either study population, despite breathing zone concentrations of PM (all sizes) that exceeded health-based guidelines in both populations. E-waste workers who worked "yesterday" did, however, have larger cross-shift declines in FVC [-2.4% (95%CI: -4.04%, -0.81%)] in comparison to those who did not work "yesterday," suggesting a possible role of cumulative exposure. Overall, short-term respiratory-related health effects related to PM exposure among e-waste workers were not seen in this sample. Selection bias due to the "healthy worker" effect, short shift duration, and inability to capture a true "pre-shift" pulmonary function test among workers who live at the worksite may explain results and suggest the need to adapt cross-shift studies for informal settings.

Assessment of pulmonary function and respiratory symptoms among INDIAN textile sizing mill workers.

Textile-sizing mill workers are exposed to various hazards in the sizing units during their working hours and are at risk of acquiring lung impairments due to the usage of sizing chemicals in the sizing process. The main aim of this study is to assess the influence of cotton dust and sizing agents on lung function and breathing difficulties among Indian textile sizing mill workers. This cross-sectional study was carried out at a textile-sizing mill from August 2022 to September 2022. A modified questionnaire based American Thoracic Society's standard was used to assess respiratory symptoms among sizing mill workers and the pulmonary function test was conducted Spirometry. The chi-square test was used to find the difference between respiratory symptoms and the t-test was used to find the difference between spirometric parameters. Textile sizing mill workers showed significant (P < 0.0001) decline in peak expiratory flow rate, forced vital capacity (FVC), ratio of FEV1 and forced vital capacity, and forced expiratory volume in 1 s (FEV1). There was an association between symptoms and duration of exposure to pulmonary abnormality. Sizing mill workers showed a significant decline in lung functions and an increase in pulmonary symptoms. As the service duration of exposure in terms of years increased, respiratory symptoms increased and spirometric abnormality also increased. This study confirms that sizing agents such as polyvinyl alcohol (PVA), emulsifier, wax, carboxymethyl cellulose (CMC), and starch used in sizing mills are also responsible for respiratory illness and lung impairment among textile workers.

Assessment of Pulmonary Functions in Parkinson's Disease and Unveiling the Role of Levodopa Therapy: A Cross-Sectional Study.

This investigation aimed to thoroughly characterize the range of pulmonary function abnormalities present in individuals with Parkinson's disease (PD) and to evaluate the effects of levodopa therapy on these respiratory dysfunctions. Ninety-five PD patients diagnosed via the UK Parkinson's Disease Society Brain Bank Diagnostic Criteria were recruited, excluding those with a smoking history or unable to perform pulmonary function tests (PFTs). Severity was assessed using the Hoehn and Yahr Scale. Spirometry-measured PFT parameters (forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), and peak expiratory flow rate (PEFR)) were compared against matched predicted values. The changes in PFT parameters post-levodopa challenge were assessed. Most of the PD patients were aged between 51-60 years, with a mean age of 55.89 ± 8.37 years. Of these, 65.3% were male. A significant proportion of the cohort exhibited restrictive pulmonary patterns (73.7%), while a smaller fraction displayed obstructive (7.4%) or normal (18.9%) pulmonary function patterns. Notably, levodopa treatment correlated with marked improvements in all measured PFT parameters, especially evident in the enhancements from the "off" medication stage to the "on" stage for FVC and FEV1 (P=0.0001). A weak positive correlation between the severity of respiratory restriction and the duration of PD (r = 0.139, P = 0.021) was found, suggesting that PD's progression exerts an increasingly adverse effect on respiratory function over time. The findings of this study illustrate that restrictive pulmonary abnormalities are more prevalent than obstructive patterns in PD patients and that these patients respond favorably to levodopa therapy.

Clinical, physical, and psychological outcomes among individuals with post COVID-19 syndrome with different functional status: a cross-sectional study

Introduction: Post-COVID-19 syndrome or long COVID is a condition characterized by symptoms that persist after the disease's infection. Objective: To compare clinical, physical, and psychological outcomes among individuals with post COVID-19 syndrome with different levels of functional status after hospitalization for COVID-19. Methods: An observational, analytical, cross-sectional and with a quantitative approach with 75 individuals with post COVID-19 syndrome after hospitalization. Individuals underwent assessment of pulmonary function, six-minute walk test (6MWT), 1-minute sit and stand test (STS1), hand grip strength (HGS) and one repetition maximum test (1RM), Hospital Anxiety and Depression Scale (HADS), Short-Form Healthy Survey (SF-36) and Post-COVID Functional Scale (PCFS). Individuals were separated according to PCFS into two groups: low (LFL) and high (HFL) functional limitation (PCFS 1-2 and PCFS 3-4, respectively). Data regarding anthropometric and clinical characteristics, hospitalization history, and occupational activity were also collected. Results: Individuals post COVID-19 syndrome with HFL presented worse score in the SF-36 in the functional capacity (p=0,01); pain (p=0,01), social aspects (p=0,01) and these individuals had a higher need for ICU admission (p=0,03) and prolonged hospitalization stays (p=0,04) compared to those with LFL. Conclusion: Individuals with post COVID-19 syndrome that reported HFL exhibit poorer quality of life concerning the domains of functional capacity, pain, and social aspects when compared to those with LFL. Additionally, HFL individuals had a higher need for ICU admission and prolonged hospitalization stays.

Long-term outcomes of survivors with influenza A H1N1 virus-induced severe pneumonia and ARDS: a single-center prospective cohort study.

Systematic evaluation of long-term outcomes in survivors of H1N1 is still lacking. This study aimed to characterize long-term outcomes of severe H1N1-induced pneumonia and acute respiratory distress syndrome (ARDS). This was a single-center, prospective, cohort study. Survivors were followed up for four times after discharge from intensive care unit (ICU) by lung high-resolution computed tomography (HRCT), pulmonary function assessment, 6-minute walk test (6MWT), and SF-36 instrument. A total of 60 survivors of H1N1-induced pneumonia and ARDS were followed up for four times. The carbon monoxide at single breath (DLCO) of predicted values and the 6MWT results didn't continue improving after 3 months. Health-related quality of life didn't change during the 12 months after ICU discharge. Reticulation or interlobular septal thickening on HRCT did not begin to improve significantly until the 12-month follow-up. The DLCO of predicted values showed negative correlation with the severity degree of primary disease and reticulation or interlobular septal thickening, and a positive correlation with physical functioning. The DLCO of predicted values and reticulation or interlobular septal thickening both correlated with the highest tidal volume during mechanical ventilation. Levels of fibrogenic cytokines had a positive correlation with reticulation or interlobular septal thickening. The improvements in pulmonary function and exercise capacity, imaging, and health-related quality of life had different time phase and impact on each other during 12 months of follow-up. Long-term outcomes of pulmonary fibrosis might be related to the lung injury and excessive lung fibroproliferation at the early stage during ICU admission.

Pulmonary function assessments and clinical correlates in children with sickle cell disease in Cape Town, South Africa

Objectives: Among children with sickle cell disease (SCD) in Africa, there are varied reports on pulmonary function assessments. Restrictive pulmonary function is common in children with SCD in Africa; however, reports from Africa are few. We aimed to describe pulmonary function and its clinical correlates in children with SCD in Cape Town, South Africa. Materials and Methods: A prospective cross-sectional study was carried out over seven months from October 2018 to April 2019 in children 6–16 years with SCD. Children with hemoglobin (Hb) genotypes, homozygous for the BS globin mutation, and sickle-beta0-thalassemia Hb were included in the study. Children were excluded if they had acute complications. Medical record review clinical, laboratory, and pulmonary function assessments were done. Data were entered into Excel and exported to Stata Version 16.0 statistical software for analysis. Results: A total of 25 participants were recruited, mean (standard deviation) age of 10 ± (3.0) years. Thirteen (53%) children were under ten years and 15 (60%) were male. The median/interquartile range age at diagnosis was 1.7 [0.8–3.0] years. SCD-related complications were common. A review of the medical records showed a third of the patients (32%) had at least one previous episode of acute chest syndrome, 20 (80%) had a history of vaso-occlusive crisis, and 15 (76%) had required at least one blood transfusion. Spirometry was performed on 19 (76%) of the participants 9 (47%) had abnormal lung function. The most common spirometry abnormality was a restrictive pattern (forced vital capacity (FVC) &lt; lower limit of normal (LLN)). No participant had a positive bronchodilator response. Older age was associated with a decrease in forced expiratory volume in the first second (FEV1) Z-score (−0.16, 95% confidence interval [CI] −0.31, −0.01; P = 0.04). Children on hydroxyurea similarly had reduced FEV1 Z-score (−1.5, 95%CI −2.88, −0.12; P = 0.04) and reduced FVC Z-score (−2.21, 95%CI −3.64, −0.79; P &lt; 0.001). Conclusion: Lung function abnormalities were common among children with SCD, with restrictive abnormality predominating. Asthma and obstructive airway abnormalities were uncommon in children with SCD in South Africa.

A cross-sectional study on the correlation of pulmonary function with duration of Rheumatoid arthritis

Rheumatoid arthritis (R.A.) is characterized by chronic inflammatory symmetrical peripheral polyarthritis associated with systemic involvement. Pulmonary involvement is one of them. Therefore, early assessment of pulmonary function may help identify the type of respiratory involvement and hence can contribute to properly managing pulmonary complications.The study aims to evaluate the type and extent of pulmonary function abnormality in relation to the duration of Rheumatoid Arthritis. Settings and Design: tertiary care treating hospital- a cross-sectional observational study A cross-sectional study was conducted at Department of General Medicine in forty R.A. cases in whom spirometry was performed and values of spirometry results were statistically compared with the duration of R.A. using S.P.S.S. software. Cases were grouped into three categories based on the duration of the disease. Category A –less than 5 yrs, category B– 5 to 9 yrs and category C – more than 9 yrs duration. In category A, abnormal pulmonary function test (PFT) was observed in 43.5% of cases in the form of obstructive 17.4%, restrictive 17.4% and mixed pattern in 8.7% of cases. In category B, the restrictive pattern was found in 63.6% and a mixed pattern in 9.1% of cases. However, abnormal pulmonary function test (PFT) was observed in all cases in category C, with obstructive pattern in 16.7%, restrictive 66.7% and mixed 16.7% cases. From the study, it was found that early pulmonary involvement occurs in R.A. With an increase in the duration of R.A., pulmonary involvement becomes a more severe and restrictive pattern. Most cases with a duration of more than 9yrs had significant pulmonary involvement either in the form of restrictive or obstructive pattern. Hence PFT should be done at the earliest as a routine and repeated periodically in R.A. cases.

Pilot study of paediatric regional lung function assessment via X-ray velocimetry (XV) imaging in children with normal lungs and in children with cystic fibrosis

IntroductionCystic fibrosis (CF) is a life-limiting autosomal recessive genetic condition. It is caused by mutations in the gene that encodes for a chloride and bicarbonate conducting transmembrane channel. X-ray velocimetry...

NLRP3 inflammasome mediates abnormal epithelial regeneration and distal lung remodeling in silica‑induced lung fibrosis.

NOD-like receptor protein 3 (NLRP3) inflammasome is closely related to silica particle‑induced chronic lung inflammation but its role in epithelial remodeling, repair and regeneration in the distal lung during development of silicosis remains to be elucidated. The present study aimed to determine the effects of the NLRP3 inflammasome on epithelial remodeling and cellular regeneration and potential mechanisms in the distal lung of silica‑treated mice at three time points. Pulmonary function assessment, inflammatory cell counting, enzyme‑linked immunosorbent assay, histological and immunological analyses, hydroxyproline assay and western blotting were used in the study. Single intratracheal instillation of a silica suspension caused sustained NLRP3 inflammasome activation in the distal lung. Moreover, a time‑dependent increase in airway resistance and a decrease in lung compliance accompanied progression of pulmonary fibrosis. In the terminal bronchiole, lung remodeling including pyroptosis (membrane‑distributed GSDMD+), excessive proliferation (Ki67+), mucus overproduction (mucin 5 subtype AC and B) and epithelial‑mesenchymal transition (decreased E‑Cadherin+ and increased Vimentin+), was observed by immunofluorescence analysis. Notably, aberrant spatiotemporal expression of the embryonic lung stem/progenitor cell markers SOX2 and SOX9 and ectopic distribution of bronchioalveolar stem cells were observed in the distal lung only on the 7th day after silica instillation (the early inflammatory phase of silicosis). Western blotting revealed that the Sonic hedgehog/Glioma‑associated oncogene (Shh/Gli) and Wnt/β‑catenin pathways were involved in NLRP3 inflammasome activation‑mediated epithelial remodeling and dysregulated regeneration during the inflammatory and fibrotic phases. Overall, sustained NLRP3 inflammasome activation led to epithelial remodeling in the distal lung of mice. Moreover, understanding the spatiotemporal profile of dysregulated epithelial repair and regeneration may provide a novel therapeutic strategy for inhalable particle‑related chronic inflammatory and fibrotic lung disease.

Assessment of Pulmonary Function in COVID-19 Recovered Health Science Students: A Descriptiv Cross-sectional Study

Introduction: Coronavirus Disease-2019 (COVID-19) impacts multiple organs like the kidneys, heart, and liver, but primarily affects the respiratory system, leading to symptoms such as cough with sputum production, fever, and in severe cases, respiratory failure. Research on Severe Acute Respiratory Syndrome (SARS)-Coronavirus-2 (CoV-2) has revealed impairments in lung function during the early recovery phase following COVID-19 infection. The aim is to understand the virus’s impact and identify any obstructive, restrictive, or mixed pulmonary alterations in medical professionals six weeks after recovery. Aim: To assess Pulmonary Function Tests (PFTs) six weeks after COVID-19 recovery in health science students at a medical college in North Karnataka. Materials and Methods: A descriptive cross-sectional study was conducted in the Department of Physiology at Jawaharlal Nehru Medical College in North Karnataka, India, from January 2021 to December 2021. A total of 155 COVID-19-recovered health science students were included, and their anthropometry, physiological parameters, and pulmonary parameters were recorded. The “Spirometer Helios 401” was used to estimate an individual’s PFT. Data were analysed using independent sample t-tests, with a p-value &lt;0.05 considered statistically significant. Results: The mean age of the participants was 21.73±3.04 years. The Mean±Standard Devaiation (SD) of Forced Vital Capacity (FVC) (L), Forced Expiratory Volume (FEV) at the end of one second (L), Peak Expiratory Flow Rate (L), forced mid expiratory flow 25-75 (L/s), forced mid expiratory flow 25% (L/s), forced mid expiratory flow 50% (L/s), forced mid expiratory flow 75% (L/s), Inspiratory Reserve Volume (IRV) (L), Expiratory Reserve Volume (ERV) (L), Inspiratory Capacity (IC) (L), and Maximum Voluntary Ventilation (MVV) (L) ± SD of post-COVID-19 subjects were less compared to their corresponding predicted values. The Mean±SD of FEV1/FVC (%) and tidal volume (L) of COVID-19 recovered subjects were higher than their corresponding expected value. The FEV, Forced Expiratory Flow (FEF), and FEV1 values were significantly less in females compared to males. Conclusion: Coronavirus Disease-19-recovered subjects showed altered respiratory functions even after six weeks, with the majority having restrictive disease, followed by a mixed pattern and obstructive diseases, while the remaining showed no changes in lung function. Altered pulmonary functions in COVID-19 patients may be due to alveolar destruction or pulmonary interstitial fibrosis.

Pulmonary function assessment after COVID-19 in vaccinated healthcare workers

COVID-19 typically presents with flu-like symptoms due to the viral infection itself. The most severe cases are characterised by lung damage, an important factor in fatal outcome due to alveolar damage. In some cases, patients develop a long COVID with persistent symptoms of chest pain and fatigue. Causes, including organ damage or inflammation, are being investigated. Clinical outcomes are variable and permanent lung damage is not fully understood, while vaccination is effective against severe infection but its effect on respiratory function in mild cases remains uncertain. This retrospective study aims to analyse changes in lung function in HCWs who had COVID-19 between 2020 and 2022, comparing their spirometric test results before and after the pandemic and taking into account their vaccination status. 321 HCWs were included in the study. The study examined spirometric parameters both before and after the pandemic, and all measured outcomes except the FEV1/FVC ratio showed a significant decrease during the study period. We then assessed the association between SARS-CoV-2 infection and changes in lung function parameters, analysing infections in 2020, 2021 and 2022 separately. We found a statistically significant difference in Forced vital capacity (FVC) between infected and non-infected subjects in 2020 and 2021, but not in 2022. To evaluate the protective effect of SARS-CoV-2 vaccination on respiratory function, a linear regression analysis was performed using changes in FVC, Forced expiratory volume in 1 s (FEV1), FVC/FEV1 ratio and Peak expiratory flow (PEF) as dependent variables. The analysis showed that the decline in FVC was significantly lower in subjects who had been vaccinated prior to infection. The study concludes that subclinical SARS-CoV-2 infections in 2020 and 2021 worsened respiratory parameters (FVC and FEV1), but vaccination protected against these effects. Even healthy individuals with previous infections showed respiratory changes, with vaccination providing protection, especially for FVC decline. This highlights the importance of vaccinating healthcare workers against COVID-19.

Effect of Wearing a Face Mask on the 6-Minute Walk Test in Healthy Volunteers

Objective: This study aimed to examine the influence of wearing different types of face masks on the results of the 6-Minute Walk Test (6MWT) in a cohort of healthy volunteers. Materials and Methods: Volunteers were partitioned into three groups (each comprising 36 individuals) with different mask-wearing conditions: NIOSH-approved N95 mask, and double-mask scenarios featuring two layers of surgical mask, and a combination of a surgical mask covered by a cloth face mask. Each participant performed two rounds of the 6MWT, one while wearing a mask and another without. Various metrics, such as the six-minute walk distance (6MWD), oxygen saturation (SpO2), and dyspnea and fatigue scores, were measured. Results: No significant differences were found in the 6MWD results between the mask-wearing and non-mask-wearing scenarios across all the mask types.Strong positive correlations were also established between the 6MWD results in the mask-wearing and non-mask-wearing conditions. However, a small cohort experienced dyspnea significantly more when wearing double surgical masks compared to not wearing a mask. Additionally, there were no major deviations in SpO2 levels or fatigue scores regardless of the type of mask used. Conclusion: The study indicated that wearing an N95 mask, or double surgical masks, or cloth-over-surgical face masks did not significantly influence the outcomes of the 6MWT in healthy individuals. However, caution is advised in the case of wearing double surgical masks, as this may induce a greater sense of dyspnea. This suggests that face masks can be worn safely during physical fitness and pulmonary function assessments, aligning with their essential role in viral spread prevention in daily life.

EP08.02-09 Comprehensive Assessment of Pulmonary Function in Patients Receiving Radical (Chemo)Radiotherapy for Carcinoma Lung

EP08.02-09 Comprehensive Assessment of Pulmonary Function in Patients Receiving Radical (Chemo)Radiotherapy for Carcinoma Lung

Pulmonary Function Assessment in Myasthenia Gravis Patients in a National Referral Hospital in Indonesia.

Myasthenia gravis (MG) can cause respiratory muscle weakness and the need of ventilator support. Spirometry as the gold standard for pulmonary function examination has limited availability, especially in our hospital which is only available in outpatient clinic during work hours (not in emergency room or patient room). Furthermore, all primary healthcare in Indonesia do not have spirometry equipment, thus other alternatives are required. This study aimed to analyze the relationship between a single breath counting test (SBCT), peak flow meter (PFM), and spirometry to assess pulmonary function in MG patients in a national referral hospital in Indonesia. A single-center, cross-sectional study was conducted and SBCT, PFM, and spirometry examination were performed in MG patients and healthy controls. Seventy patients, aged 47.7 ± 13.4 years old, participated in this study. SBCT, forced vital capacity first second (FVC1), and forced expiratory volume first second (FEV1) value between MG patients and healthy controls showed a significant difference, in which healthy controls have higher SBCT, FVC1, and FEV1 values (p = 0.000, p = 0.000 and p = 0.001 respectively). There was a significant difference between PFM with SBCT and FVC1 value in MG patients. Strong correlation was found between SBCT and FVC1 in MG patients. MG patients had worse pulmonary function compared to healthy controls. SBCT and PFM examination have a significant correlation with FVC1 in MG patients. Therefore, SBCT and PFM can be used as a bedside tool to detect respiratory impairment in MG patients.

Neoadjuvant immune checkpoint inhibitor therapy and chemotherapy improve pulmonary ventilation and diffusion function in patients with lung cancer.

To investigate changes of pulmonary ventilation function and diffusion function in lung cancer patients after neoadjuvant immune checkpoint inhibitors (ICIs) therapy combined with chemotherapy treatment. Patients with newly diagnosed lung cancer (Ⅱa-Ⅲb) admitted to Zhejiang Cancer Hospital from October 2021 to July 2022, who received ICIs combined with chemotherapy for more than two courses were enrolled. Patients underwent pulmonary ventilation function and diffusion function assessments before and after treatment. The demographic information, sizes and locations of cancer lesions, doses and duration of ICIs used, pulmonary function results before and after treatment, and the tumor regression were documented. The changes of pulmonary function parameters before and after the treatment were analyzed with paired t test and Wilcoxon rank-sum test. The factors influencing the pulmonary function changes were analyzed by multiple linear Lasso regression and ridge regression. Among the 52 patients, 50 cases were males (96.15%) and 43 cases were squamous carcinoma (82.69%). The medium age of the patients was 67 years. After neoadjuvant therapy, 36 patients (69.23%) showed remission of tumor lesions. After treatment, the parameters of pulmonary ventilation inspiratory vital capacity (IVC) and the area under the expiratory flow-volume curve (AREAex), and the parameter of pulmonary diffusion total lung capacity increased compared with the baseline (all P<0.05). Forced vital capacity (FVC) and forced expiratory volume in first second (FEV1) also showed an increasing trend. Multivariate linear Lasso regression and ridge regression showed that baseline IVC had a significant negative effect on IVC improvement (Beta=－0.435, t=－2.968, P<0.01), baseline TLC had a significant negative effect on the improvement of TLC (Beta=－0.266, t=－2.474, P<0.05), and the remission of obstructive pneumonia favored the improvement of TLC (Beta=0.308, t=2.443, P<0.05). After ICIs neoadjuvant treatment combined with chemotherapy, the lung ventilation and diffusion function can be improved in lung cancer patients, particularly for those with reduced baseline ventilation and diffusion function.

The Effects of Prenatal Pravastatin Treatment in the Rabbit Fetal Growth Restriction Model.

Fetal growth restriction (FGR) remains without an effective prenatal treatment. Evidence from murine FGR models suggests a beneficial effect of prenatal pravastatin. Since the rabbit hemodichorial placenta more closely resembles the human condition, we investigated the effects of prenatal maternal pravastatin administration in the rabbit FGR model. At a gestational age of 25 days (term 31d), pregnant dams underwent partial uteroplacental vessel ligation (UPVL) in one uterine horn to induce FGR, leaving the other horn as a control. Dams were randomized to either receive 5 mg/kg/d pravastatin dissolved in their drinking water or normal drinking water until delivery. At GA 30d, the rabbits were delivered and were divided into four groups: control without pravastatin (C/NoPrav), FGR without pravastatin (FGR/NoPrav), FGR with pravastatin (FGR/Prav), and controls with pravastatin (C/Prav). The newborn rabbits underwent pulmonary functional assessment and neurobehavioral assessment, and they were harvested for alveolar morphometry or neuropathology. The placentas underwent histology examination and RNA expression. Birth weight was lower in the FGR groups (FGR/Prav, FGR/NoPrav), but there was no difference between FGR/Prav and C/NoPrav. No differences were noted in placental zone proportions, but eNOS in FGR/Prav placentas and VEGFR-2 in FGR/Prav and C/Prav were upregulated. There were no differences in pulmonary function assessment and alveolar morphometry. FGR/Prav kittens had increased neurosensory scores, but there were no differences in neuromotor tests, neuron density, apoptosis, and astrogliosis. In conclusion, in the rabbit FGR model, pravastatin upregulated the expression of VEGFR-2 and eNOS in FGR placentas and was associated with higher neurosensory scores, without measurable effects on birthweight, pulmonary function and morphology, and neuron density.

Influence of Schroth Best Practice Therapy on Ventilatory Function in Adolescent Idiopathic Scoliosis: Randomized Controlled Study Design

Introduction: Approximately 2%-3% of the population develops idiopathic scoliosis, making it the most prevalent structural spinal deformity in children as well as adolescents. Objective: To find out the efficacy of Schroth Best Practice therapy on pulmonary functions in adolescent idiopathic scoliosis. Methods: Sixty female subjects with adolescent idiopathic scoliosis were recruited from Outpatient Department at AlKasr Al-Ainy Hospital from May 2022 to July 2023 were enrolled in that study. They were randomized into two equivalent groups: Either the intervention group: Group A (Study group) consists of 30 subjects received the Schroth Best Practice exercises program for 18 weeks, or the control group Group B: consists of 30 subjects received traditional exercise program for 18 weeks. Both groups were given 3 sessions a week. Both groups received assessment of pulmonary functions: Forced Vital Capacity (FVC), forced expiratory volume in the first second (FEV1) As well as Peak Expiratory Flow (PEF) on 1st and 18th week. Measuring pulmonary function with digital handheld spirometer before and after treatment. These selective subjects were randomized into two equal groups. Results: There was a statistically significant difference (p&lt;0.05) among the two groups when comparing the mean values of all measured variables pre and post treatment. All analyses were performed at the 0.05 level of significance. With the initial alpha level set at 0.05, in favor of group A. Conclusion: Both Schroth Best Practice exercise program and traditinal exercise program have a significant effect in adolescent idiopathic scoliosis, and the integrated Schroth Best Practice exercise program was more effective than traditional exercise alone.

Omalizumab for Chinese patients with moderate-to-severe allergic asthma in real-world clinical setting: a prospective, observational study

BackgroundWe aimed to investigate the effectiveness of omalizumab, a monoclonal anti-immunoglobulin E antibody, in Chinese patients with moderate-to-severe allergic asthma in real-world clinical practice.MethodsThis single-centre, prospective, observational study included Chinese...