Ratio Of FEV1 Research Articles

Tidal Breathing Analysis as a Prognostic Index for Airway Obstruction Trajectory and Asthma in Preterm Infants.

An easy-to-implement and accurate lung function assessment tool for preterm infants is crucial to manage lifelong respiratory morbidities. We aimed to determine which pulmonary function parameters in preterm infants can predict the trajectory of airway obstruction and asthma development after 4years of age. We evaluated 52 preterm infants who had undergone both tidal breathing flow-volume loop (TBFVL) and multiple-breath washout (MBW) analyses in infancy and spirometry after the age of 4years. We evaluated the association between pulmonary function parameters in infancy and childhood and the pulmonary function trajectory until 13years of age and compared the changes in this trajectory according to pulmonary function parameters in infancy. Time to peak expiratory flow/expiratory time (TPEF/TE) in infancy was associated with FEV1, FEF25-75, and dysanapsis ratio in childhood and differed according to level of airway obstruction assessed by FEV1, FEV1/FVC, and FEF25-75, an asthma development. TPEF/TE was a significant predictive factor for airway obstruction and asthma after 4years of age, after adjusting for sex, extreme prematurity, duration of supplementary oxygen and mechanical ventilation, and recurrent wheezing during infancy. In premature infants with lower TPEF/TE, subsequent pulmonary function parameters remained low until 13years of age. In preterm infants, TPEF/TE could be useful to predict airway obstruction and asthma after 4years of age and even a lower pulmonary function trajectory until 13years of age. This information may help clinicians to provide lifelong care for pulmonary morbidity in children and adolescents born preterm.

The efficacy and safety of herbal formulas for adults with pulmonary hypertension combined with chronic obstructive pulmonary disease: a systematic review and meta-analysis involving 1,865 participants.

There is currently no effective treatment for the majority of patients with chronic obstructive pulmonary disease combined with pulmonary hypertension (COPD-PH). Numerous clinical trials have demonstrated the use of traditional Chinese medicine (TCM) herbal formulas in combination with routine western pharmacotherapy (WP) for the treatment of COPD-PH, with positive results. This meta-analysis was designed to evaluate the efficacy and safety of TCM herbal formulas in the treatment of COPD-PH. A systematic literature search was conducted using Web of Science, PubMed, Chinese National Knowledge Infrastructure (CNKI), WanFang, and Chinese Science and Technology Journal (VIP) from database inception until October 2023. The primary outcome was pulmonary artery pressure parameters, including pulmonary artery systolic pressure (PASP) and mean pulmonary artery pressure (mPAP). Secondary outcomes included pulmonary ventilation function parameters, such as forced expiratory volume in one second (FEV1) and the ratio of FEV1 to forced vital capacity (FEV1/FVC%), as well as functional capacity assessments measured by the six-minute walk distance (6MWD). Reviewer Manager software was used for both random-effects and fixed-effects meta-analyses. We registered the protocol for this study with the International Platform of Registered Systematic Review and Meta-analysis Protocols (INPLASY, registry number: INPLASY2022100041). Twenty randomized control trials with a total of 1,865 patients were included in the meta-analysis. The results of our meta-analysis revealed that TCM herbal formulas in combination with basic WP significantly reduced pulmonary artery pressure in patients with COPD-PH, including PASP [mean difference (MD) =-4.50 mmHg, 95% confidence interval (CI): -6.04, -2.95] and mPAP (MD =-4.47 mmHg, 95% CI: -5.07, -3.88). Additionally, pulmonary ventilation function and 6MWD (MD =48.13 m, 95% CI: 39.92, 56.34) were also improved in COPD-PH patients. Pulmonary ventilation function was reflected by FEV1 (MD =0.83 L, 95% CI: 0.35, 1.30) and FEV1/FVC% (MD =4.76, 95% CI: 3.75, 5.77). A total of six studies reported adverse events in detail, and all claimed that no adverse events were observed in COPD-PH patients using TCM herbal formulas. The combination of TCM herbal formulas and basic WP might be more effective in improving the quality of life and exercise capacity of patients with COPD-PH than basic WP alone. However, the firm conclusions of our study were hampered by the low quality of the evidence.

Association between metabolic dysfunction-associated steatotic liver disease and pulmonary function: a population-based and two-sample mendelian randomization study

BackgroundHepatic steatosis and its related complications are risk factors for multiple respiratory diseases; however, the causal relationship between metabolic dysfunction-associated steatotic liver disease (MASLD) and pulmonary function remains controversial. We aimed to identify it using a national cohort and Mendelian randomization (MR).MethodsWe enrolled 30,442 participants from the 2007 to 2012 National Health and Nutrition Examination Survey. Demographics, pulmonary function indices (forced expiratory volume in 1 s [FEV1], forced vital capacity [FVC]), and variables used to calculate the liver fat score (LFS) were collected. A two-sample MR analysis employing the summary data of genome-wide association studies on MASLD and FEV1/FVC, chronic obstructive pulmonary disease (COPD), and asthma from the Finngen Biobank and Medical Research Council Integrative Epidemiology Unit was performed.ResultsA total of 3,462 participants, 1,335 of whom had MASLD (LFS > -0.640), were finally included in the study. The FEV1 (3,204.7 vs. 3,262.5 ml, P = 0.061), FVC (4,089.1 vs. 4,143.8 ml, P = 0.146), FEV1/FVC ratio (78.5% vs. 78.8%, P = 0.233), and FEV1/predicted FEV1 ratio (146.5% vs. 141.7%, P = 0.366) were not significantly different between people with MASLD and those without. Additionally, the MR analysis suggested no causal correlation between MASLD and FEV1/FVC (P = 0.817), MASLD and COPD (P = 0.407), and MASLD and asthma (P = 0.808). Reverse MR studies showed no causal relationships yet (all P > 0.05).ConclusionOur study provides convincing evidence that there is no causal association between MASLD and pulmonary function.

A 12-week double-blind randomised controlled trial investigating the effect of dietary supplementation with 5000 μg/d (125 µg/d) vitamin D in adults with asthma.

Vitamin D deficiency has previously been linked to higher rates of exacerbation and reduced lung function in asthmatics. Previous randomised controlled trials investigating the effect of vitamin D supplementation have mainly focused on children with asthma. Trials involving adults have typically used bolus dosing regimens, and the main outcomes have been patient-focused without investigating underlying inflammation. The present study aimed to conduct a 12-week placebo-controlled randomised controlled trials administering a daily 5000 μg (125 µg) vitamin D3 supplement to adults with mild to moderate asthma. A total of 32 participants were randomised to receive either the 5000 μg vitamin D3 supplement or an identical matching placebo. The primary outcome of the study was lung function measured by the ratio of FEV1:FVC (effect size 2·5) with secondary outcomes including asthma symptoms and inflammatory biomarkers. There was a small but statistically significant higher increase in the mean (±sd) ratio of FEV1:FVC from baseline to post-intervention in the vitamin D group (+0·05 ± 0·06) compared with the placebo group (+0·006 ± 0·04, P = 0·04). There was no effect of the intervention on asthma control test scores, or the inflammatory biomarkers measured. There was a moderate, significant association between baseline plasma 25(OH)D concentration and baseline plasma IL-10 (r = 0·527, P = 0·005) and TNF-α (r = −0·498. P = 0·008) concentrations. A daily vitamin D3 supplement led to slightly improved lung function in adult asthmatics and may be a useful adjunct to existing asthma control strategies, particularly for individuals with suboptimal vitamin D status.

Clinical application of computed tomographic volumetric imaging in postoperative lung function assessment in patients with lung cancer.

To evaluate the effectiveness of the computed tomographic (CT) volumetric analysis in postoperative lung function assessment and the predicting value for postoperative complications in patients who had segmentectomy for lung cancer. CT scanning and pulmonary function examination were performed for 100 patients with lung cancer. CT volumetric analyses were performed by specific software, for the volume of the inspiratory phase (Vin), the mean inspiratory lung density (MLDin), the volume of expiratory phase (Vex), and the mean lung density at expiratory phase (MLDex). Pulmonary function examination results and CT volumetric analysis results were used to predict postoperative lung function. The concordance and correlations of these values were assessed by Bland-Altman analysis and Pearson correlation analysis, respectively. Multivariate binomial logistic regression analysis was executed to assess the associations of CT data with complication occurrence. Correlations between CT scanning data and pulmonary function examination results were significant in both pre- and post-operation (0.8083 ≤ r ≤ 0.9390). Forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), and the ratio of FVC and FEV1 estimated by CT volumetric analyses showed high concordance with those detected by pulmonary function examination. Preoperative (Vin-Vex) and (MLDex- MLDin) values were identified as predictors for post-surgery complications, with hazard ratios of 5.378 and 6.524, respectively. CT volumetric imaging analysis has the potential to determine the pre- and post-operative lung function, as well as to predict post-surgery complication occurrence in lung cancer patients with pulmonary lobectomy.

Development and validation of a pulmonary function test data extraction tool for the US department of veterans affairs electronic health record

ObjectivePulmonary function test (PFT) results are recorded variably across hospitals in the Department of Veterans Affairs (VA) electronic health record (EHR), using both unstructured and semi-structured notes. We developed and validated a hospital-specific code to extract pre-bronchodilator measures of obstruction (ratio of forced expiratory volume in one second [FEV1] to forced vital capacity [FVC]) and severity of obstruction (percent predicted of FEV1).ResultsAmong 36 VA facilities with the most PFTs completed between 2018 and 2022 from a parent cohort of veterans receiving long-acting controller inhalers, 12 had a consistent syntactical convention or template for reporting PFT data in the EHR. Of the 42,718 PFTs identified from these 12 facilities, the hospital-specific text processing pipeline yielded 24,860 values for the FEV1:FVC ratio and 23,729 values for FEV1. A ratio of FEV1:FVC less than 0.7 was identified in 17,615 of 24,922 studies (70.7%); 8864 of 24,922 (35.6%) had a severe or very severe reduction in FEV1 (< 50% of the predicted value). Among 100 randomly selected PFT reports reviewed by two pulmonary physicians, the coding solution correctly identified the presence of obstruction in 99 out of 100 studies and the degree of obstruction in 96 out of 100 studies.

Influence of sitting time on pulmonary function in computerusing office workers.

We aimed to identify the changes in pulmonary function after prolonged sitting. Pulmonary function tests (PFTs) allow physicians to assess the respiratory capability of patients under numerous clinical circumstances and when there are risk factors for lung sickness, occupational exposure, and pulmonary toxicity. PFTs are routinely performed in the standing or high sitting position because of the devices and patient comfort. A total of 180 asymptomatic office workers were recruited as eligibility criteria and divided into three groups according to their daily sitting duration (group 1:2-4 h, group 2:4-6 h, and group 3: > 6 h). PFTs were performed twice consecutively to determine the mean of the readings. A Helios 401 spirometer was used to quantify lung function. The parameters were "forced expiratory volume in 1 s (FEV1)", "forced vital capacity (FVC)", "peak expiratory flow rate (PEFR)", and the "ratio of FEV1 to FVC (FEV1/FVC)". Our results suggest that noteworthy changes were present in the lung function of all the participants. For individuals with > 6 h of sitting; FVC, FEV1, and PEFR were higher compared to those of the participants with 2-4 h and 4-6 h of sitting. The FEV1/FVC ratio was also reduced in individuals with prolonged hours of sitting. Body position impacts the result of PFTs; however, that as it may, the ideal position and extent of advantage changed between the review populaces. These results suggested that noteworthy changes occur in the lung function of healthy individuals exposed to sitting time.

Exploring the association between ultra-processed foods and COPD: a case-control study

BackgroundWhile it is known that the overconsumption of ultra-processed foods (UPFs) is associated with a heightened risk of respiratory ailments, the specific effects of UPF intake on COPD remain unclear. This study was designed to explore the potential link between COPD and the consumption of UPFs among adult individuals in Iran.MethodsIn this hospital-based case-control study conducted at Alzahra University Hospital in Isfahan, Iran, we enrolled 84 patients newly diagnosed with COPD, along with 252 healthy controls matched for age and sex. COPD was defined based on the results of spirometry tests, specifically when the forced expiratory volume per second (FEV1) was less than 80% or the ratio of FEV1 to forced vital capacity (FVC) was less than 70%. To evaluate the dietary intake of the participants, we utilized a validated food frequency questionnaire (FFQ) consisting of 168 items. Additionally, we gathered data on potential confounding factors using a pre-tested questionnaire.ResultsThe mean ages for the case and control groups were 57.07 and 55.05 years, respectively. Our study found no significant association between the intake of ultra-processed foods (UPFs) and the likelihood of COPD, with an odds ratio (OR: 0.78, 95% CI: 0.34–1.77). This lack of association persisted even after adjusting for factors such as energy intake, sex, and age (OR: 0.48; 95% CI: 0.19–1.21). Further controlling for potential confounders like body mass index (BMI), physical activity, and smoking status did not alter this finding (OR: 0.367; 95% CI: 0.123–1.1008, P = 0.074).ConclusionsIn our study, we observed no significant association between the intake of Ultra-Processed Foods (UPFs) and the odds of Chronic Obstructive Pulmonary Disease (COPD). This finding remained consistent even after adjusting for factors such as energy intake, sex, age, Body Mass Index (BMI), physical activity, and smoking status. Therefore, within the scope of our study, it appears that the consumption of UPFs does not significantly impact the likelihood of developing COPD. However, we recommend further research to deepen our understanding of the intricate relationship between dietary habits and respiratory health.

Do vitamin D levels affect forced expiratory flow 25-75 among children with asthma?

Background: Previous reports of association between vitamin D levels and pulmonary function based on forced expiratory volume in one second (FEV1) and ratio of FEV1 to forced vital capacity (FEV1/FVC) gave mixed results. Forced expiratory flow 25-75 (FEF 25-75) is considered a sensitive parameter in children as it is effort independent.Objectives: To assess the correlation between serum vitamin D levels and pulmonary function parameters in children with asthma.Method: This cross-sectional analytic study was conducted at the paediatric respiratory clinic of a tertiary care referral hospital. Children aged 6-12 years, having asthma, on controllers with good compliance and under regular follow-up were enrolled.Results: Mean serum vitamin D level (16.8± 6.69ng/ml) was low and deficiency was seen in 36 (72%) children with asthma. Positive correlation (r=0.41) was seen between serum vitamin D levels and predicted FEF 25-75%. Univariate analysis between vitamin D and FEF 25-75 showed decreased vitamin D levels were associated with significantly low FEF 25-75 (p&lt;0.001). In multivariate linear regression analysis after adjustment for age and sex, the relationship was direct and significant (R2=0.18, p&lt;0.05) but for FEV1 the relationship was not significant (R2=-0.034, p=0.336).Conclusions: Vitamin D levels showed direct and significant relationship with FEF 25-75 outcome in children with asthma.

Lung function and the risk of frailty in the European population: a mendelian randomization study

BackgroundEpidemiological evidence has suggested a relationship between lung function and frailty, but the precise nature of the causality remains unclear. In this study, we applied a two-sample Mendelian randomization (MR) analysis to determine the causal effects of lung function on frailty.MethodsSingle nucleotide polymorphisms (SNPs) independently related (P ≤ 5E−08) to lung function, as identified by genome-wide association study (GWAS), were applied as instrumental variables (IV). The association with frailty index (FI) was investigated using summary-level data from the latest GWAS on FI (n = 175,226). Different statistical methods were employed to evaluate the causal estimates between lung function and FI. The pleiotropy, heterogeneity, and leave-one-out analysis were applied to confirm the stability of the MR estimates.ResultsUsing the random-effect inverse-variance weighted approach, genetically proxied forced expiratory volume in the first second (FEV1), ratio of FEV1 on forced vital capacity (FVC) [FEV1/FVC], and peak expiratory flow (PEF) were significantly and inversely associated with FI (FEV1, β = −0.08, P = 2.03E−05; FEV1/FVC, β = −0.06, P = 9.51E−06; PEF, β = −0.07, P = 4.09E−04) with good statistical power (99.7–100%). However, no significant association was observed between FVC and FI (β = −0.01, P = 0.681). Leave-one-out analysis showed that there was no single SNP driving the bias of the estimates. There was potential heterogeneity, but no obvious pleiotropy was founded in this MR study.ConclusionsOur findings indicate that impaired pulmonary function is closely related to the risk of frailty. Enhancing lung function in the elderly population may contribute to the prevention of frailty to a certain extent.

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.

Effect of somatotypes on lung volumes, capacities and respiratory impedance: A pilot study.

The current morphological condition of an individual is described by a somatotype, which is a three-number scale. The endomorph, mesomorph and ectomorph components are presented in the same sequence, and each number corresponds to one of the three basic components of body composition. We recruited 50 healthy male subjects with a mean age of 24.10 ± 4.55 yrs. Somatotype was determined by the Heath and Carter method. Impulse oscillometry was performed followed by spirometry according to the European Respiratory Society (ERS) or American Thoracic Society (ATS) guidelines. Resistance at 5 Hz (R5) %pred, R20%pred, R5-R20, X5%pred, X20, area of reactance (Ax) and resonant frequency (Fres) were obtained by doing impulse oscillometry. Slow vital capacity (SVC), forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), FEV1/FVC ratio and maximum mid-expiratory flow (MMEF) were assessed by doing spirometry. Endomorphs (0.05 (0.00-0.09) vs 0.01 (0.00-0.04); P < 0.0001) and mesomorphs (0.04 (0.000.09) vs 0.01 (0.00-0.04); P = 0.002) had significantly higher R5-R20 than ectomorphs. Similarly, endomorphs (0.32 (0.07-0.82) vs 0.15 (0.08-0.35); P = 0.001) and mesomorphs (0.28 (0.17-0.64) vs 0.15 (0.08-0.35); P = 0.015) also showed significantly higher Ax than ectomorphs, Fres of endomorphs (15.37 (8.43-21.85) vs 10.08 (8.94-14.30); P < 0.0001) and mesomorphs (14.32 (10.24-20.86) vs 10.08 (8.94-14.30); P < 0.0001) were significantly high than ectomorphs. Moreover, spirometric measures reveal significant variation in which mesomorphs had significantly higher values of % predicted of FVC than ectomorphs (92.49 ± 7.211 vs 83.86 ± 7.861; P = 0.042) and the ratio of FEV1 to FVC was significantly higher in ectomorphs than in endomorphs (89.00 ± 5.80 vs 85.04 ± 5.73; P = 0.03). Peripheral airway dysfunction was observed in endomorphs and mesomorphs as compared to ectomorphs. Mesomorphs had a relatively higher FVC that may be due to their greater muscular strength.

Changes in Basic Pulmonary Indices of Obese Women Resident in Rivers State, Nigeria

Obesity and pulmonary diseases are said to be co-prevalent and debilitating chronic illnesses that are becoming more and more commonplace globally. This study thus, evaluated the changes in basic pulmonary indices of obese women resident in Rivers State, Nigeria. The minimum sample size of 272 was determined using the Leslie Fischer's formula; exactly 334 obese and non-obese women within their 18 and 65 years of age with no critical health condition and resident in Upland and Riverine areas of Rivers State were actually surveyed by the present study. A multistage sampling technique was adopted, and subjects were surveyed across the upland and riverine locations of the State. These subjects were evenly drawn from the multi-ethnic residents of the state. Automated spirometer was used to measure forced vital capacity (FVC); forced expiratory volume in 1 second (FEV1 and forced expiratory volume in 1 second (FEV1) and forced expiratory volume in 6 second (FEV6) and the FEV1/FVC ratio. The quantitative data were subjected to statistical analyses using the statistical package for social sciences (SPSS) version 21.0. One-way analysis of variance (ANOVA) and independent t-test with a p&lt; 0.05 considered statistically significant were determined. The result indicated that the obese subjects had reductions in some pulmonary indices, like FVC levels. On the other hand, the FVC/ FEV1 ratio had significant (p&lt;0.05) increases following increasing BMI. Further evaluations on the actual impact of obesity on FVC/ FEV1 ratio may shade more light in this direction.

PROGNOSTIC VALUE OF SIRTUIN-1 LEVEL IN BLOOD SERUM OF PATIENTS WITH CHRONIC CORONARY SYNDROME, CHRONIC OBSTRUCTIVE PULMONARY DISEASE AND THEIR COMBINATION

The aim of the work – to compare the levels of serum sirtuin-1 SIRT1 in patients withCOPD and CCS in their isolated and combined course.Materials and methods. 60 patients diagnosed with COPD, CCS and combined courseof COPD with CCS, as well as 10 practically healthy individuals as a control group,participated in the study. The degree of severity of COPD was assessed by the frequencyof exacerbations and indicators of external respiratory function (ERF): the ratio ofFEV1 (forced expiratory volume in the first second) to FVLC (forced vital capacity of thelungs), as well as the values of FEV1 and VLC. A questionnaire was used to assess theseverity of symptoms, which included the mMRC (modified Medical Research Council),dyspnea severity scale and the COPD Assessment Test. The serum level of SIRT1 wasinvestigated by enzyme-linked immunosorbent assay using Human SIRT1 ELISAKitreagents. Statistical processing of the results was carried out using Microsoft Excel andStatistica 10.0 software.The results. A study that included measuring the level of SIRT1 in blood serum showedthe following results: in patients with COPD, the average level of SIRT1 was 5.21±1.16ng/ml, in patients with C it was 6.58±1.40 ng/ml, in patients with a combined course ofCOPD and CCS – 2.32±0.73 ng/ml. The level of SIRT1 in these groups was significantlylower compared to the control group, in which it was 12.23±1.59 ng/ml (p=0.01).&#x0D; Conclusions. In patients with COPD, CCS, or a combination of these diseases, thelevel of SIRT1 in the blood is lower compared to the control group. Close correlationsbetween the level of SIRT1 in the blood and impaired external respiration, age, symptoms(measured by the mMRC scale and the CAT assessment test), and the severity of thecourse of the disease in patients with COPD and CCS, were revealed.

Application of Precision Nursing Based on Multidisciplinary Collaboration Model in Older Patients Undergoing Thoracoscopic Surgery for Lung Cancer

To examine the application effect of precision nursing strategies based on multidisciplinary collaboration model in older patients undergoing thoracoscopic surgery for lung cancer. A total of 100 patients who were admitted to our hospital for thoracoscopic surgery for lung cancer between July 2022 and March 2023 were prospectively enrolled for the study. They were assigned, with a random number table, to two groups, a control group receiving routine nursing care and an experimental group receiving nursing care based on multidisciplinary collaborative precision nursing strategies. Their lung function, anxiety and depression scores, and quality of life were assessed at three points of time, including upon admission, one week after surgery, and one month after surgery, and comparison was made between the two groups. There were significant differences in forced expiratory volume in one second (FEV1) at the three time points ( F=156.787, P<0.001) and the ratio of FEV1 to forced vital capacity (FVC) (FEV1/FVC%) at the three time points ( F=25.587, P<0.001) between two groups. There were significant difference between the findings for FEV1, FEV1/FVC%, FVC, and maximum voluntary ventilation (MVV) indexes at 1 week and those at 1 month after surgery in the experimental group ( P<0.05). After the surgery, the pulmonary function of the experimental group was better than that of the control group. The anxiety and depression scores of the experimental group were lower than those of the control group, with the difference being statistically significant ( P<0.05), which suggested that the experimental group showed improvement in anxiety and depression in comparison with the control group. Regarding the quality of life, there were significant differences between the two groups in the scores for the functional dimension ( F=109.798, P<0.001), the symptom dimension ( F=106.936, P<0.001), other items ( F=78.798, P<0.001), and overall health dimensions ( F=174.307, P<0.001). At 1 week and 1 month after surgery, the experimental group had higher scores for the functional dimension and lower scores for the symptom dimension than the control group did, with the differences being statistically significant ( P<0.05). The overall health status of the experimental group was better than that of the control group. Precision nursing strategies based on multidisciplinary collaboration model can effectively help improve the lung function, the mood, and the quality of life of patients in the short term, showing considerable promise for wide clinical application.

Assessing four-dimensional CT stress maps derived from patient-specific biomechanical models of the lung with pulmonary function test data in lung cancer patients.

This study aims to retrospectively compare the stress map of the lung with pulmonary function test (PFT) results in lung cancer patients and to evaluate the potential of the stress map as an imaging biomarker for chronic obstructive pulmonary disease (COPD). 25 lung cancer patients with pre-treatment four-dimensional CT (4DCT) and PFT data were retrospectively analysed. PFT metrics were used to diagnose obstructive lung disease. For each patient, forced expiratory volume in 1 s (FEV1 % predicted) and the ratio of FEV1 and forced vital capacity (FEV1/FVC) were recorded. 4DCT and biomechanical model-deformable image registration (BM-DIR) were used to obtain the lung stress map. The relationship between the mean of the total lung stress and PFT data was evaluated, and the COPD classification grade was also evaluated. The mean values of the total lung stress and FEV1 % predicted showed a significant strong correlation [R = 0.833, (p < 0.001)]. The mean values and FEV1/FVC showed a significant strong correlation [R = 0.805, (p < 0.001)]. For the total lung stress, the area under the curve and the optimal cut-off value were 0.94 and 510.8 Pa for the classification of normal or abnormal lung function, respectively. This study has demonstrated the potential of lung stress maps based on BM-DIR to accurately assess lung function by comparing them with PFT data. The derivation of stress map directly from 4DCT is novel method. The BM-DIR-based lung stress map can provide an accurate assessment of lung function.

Negative impact of smoking on lung function: comparing FEV1/FVC values in smokers and non-smokers.

Cigarette smoking has been reported as the significant adverse effects on lung function, which can be evaluated by measuring forced expiratory volume in one second (FEV1), forced vital capacity (FVC), and the ratio of FEV1 to FVC (FEV1/FVC) values. This study investigated the prevalence of tobacco use and nicotine dependence among college students and their stress levels to inform targeted interventions for smoking prevention and cessation. A total of 429 participants were interviewed face-to-face, of which 71.6% were female and 28.4% were male. Pulmonary function tests were exclusively administered to the 9.8% of participants who reported using tobacco. Our findings revealed a low prevalence of nicotine dependence among college students, with only 6.8% exhibiting moderate or high levels of dependence. Students who reported tobacco use were found to have moderate stress levels,suggesting a potential association between smoking and stress. Chi-square tests revealed that gender, school affiliation,and nicotine dependence were significantly associated with smoking behavior. Long-term smoking (>5 years) was found to be associated with negative health outcomes, such as higher BMI, and increased smoking per day. The analysis of lung function parameters showed that smoking frequency and duration were negatively associated with lung function, while nicotine dependence increased with smoking frequency and duration. Our study suggests that targeted prevention and cessation programs should address these factors to reduce smoking rates among college students.

Physiologic 18F-FDG muscle uptake in severe COPD: Implications for accurate lung cancer staging.

Recognizing physiologic 18F-fluorodeoxyglucose (FDG) uptake in severe COPD is crucial to avoid mistaking it for lung cancer metastasis. Correlating 18F-FDG avid lesions with co-registered computed tomography is essential for accurate lung cancer staging and preventing unnecessary interventions.

Clinical, etiological, microbiological and radiological features of bronchiectasis patients-an institution based analytical cross-sectional study

Background: Bronchiectasis is an irreversible dilatation of more than one bronchus, with decreased clearance of secretions and expiratory flow. Secondary bacterial infection is so common, which worsens the disease. Sequelae of the disease lead to poor quality of life, with increased morbidity and mortality. This issue has limited literature. Methods: Patients diagnosed to have bronchiectasis by HRCT chest in a tertiary care hospital, Alluri Sitarama academy of medical sciences, Eluru, A. P were included. Detailed clinical history was taken. After basic investigations, sputum samples were sent to CBNAAT and routine bacterial culture sensitivity. These patients were subjected to spirometry. Parameters measured in spirometry were forced vital capacity (FVC), forced expiratory volume in 1st second (FEV1), ratio of FEV1 to FVC (FEV1/FVC). Results: Forty patients were enrolled in this study. Majority of them were females i.e., 24 (60%). Most common symptom/sign was crackles (95%) followed by productive cough (92.5%), dyspnea (55%) and haemoptysis (28%). Increased growth of Pseudomonas aeruginosa (37.5%) was found followed by Klebsiella pneumoniae (30%), Streptococcus pneumoniae (15%), Staphylococcus aureus (2.5%) and H. influenzae (2.5%). Conclusions: Bronchiectasis, which is an end result of various diseases, commonly presents with productive cough, dyspnoea and haemoptysis, either as a single entity or as comorbidity with COPD or asthma. Knowledge of prevalent etiologies and types of bronchiectasis helps clinician for effective diagnosis and treatment of these patients.

Outcomes and pulmonary function after sleeve lobectomy compared with pneumonectomy in patients with non-small cell lung cancer.

Sleeve lobectomy is recommended to avoid pneumonectomy and preserve pulmonary function in patients with central lung cancer. However, the relationship between postoperative pulmonary functional loss and resected lung parenchyma volume has not been fully characterized. The aim of this study was to evaluate the relationship between pulmonary function and lung volume in patients undergoing sleeve lobectomy or pneumonectomy. A total of 61 lung cancer patients who had undergone pneumonectomy or sleeve lobectomy were analyzed retrospectively. Among them, 20 patients performed pulmonary function tests, including vital capacity (VC) and forced expiratory volume in 1 s (FEV1) tests, preoperatively and then about 6months after surgery. VC and FEV1 ratios were calculated (measured postoperative respiratory function/predicted postoperative respiratory function) as the standardized pulmonary functional loss ratio. Thirty-day operation-related mortality was significantly lower after sleeve lobectomy (3.2%) than pneumonectomy (9.6%). The 5-year relapse-free survival rate was 46.67% versus 29.03%, and the 5-year overall survival rate was 63.33% versus 38.71% in patients receiving sleeve lobectomy versus pneumonectomy. The VC ratio in the pneumonectomy group was better than in the sleeve lobectomy group (1.003 ± 0.117 vs. 0.779 ± 0.12; p=0.0008), as was the FEV1 ratio (1.132 ± 0.226 vs. 0.851 ± 0.063; p=0.0038). Both short-term and long-term outcomes were better with sleeve lobectomy than pneumonectomy. However, actual postoperative pulmonary function after pneumonectomy may be better than clinicians expect, and pneumonectomy should still be considered a treatment option for patients with sufficient pulmonary reserve and in whom sleeve lobectomy is less likely to be curative.