Pulmonary Function Test Parameters Research Articles

Factors associated with adherence to noninvasive positive pressure ventilation in amyotrophic lateral sclerosis.

This cohort study aimed to investigate the factors associated with noninvasive positive pressure ventilation adherence and assess the long-term effects of noninvasive positive pressure ventilation adherence in patients with amyotrophic lateral sclerosis (ALS). The medical records of patients with ALS admitted to a tertiary hospital for noninvasive positive pressure ventilation initiation were retrospectively reviewed. Pulmonary function parameters, variables of blood gas analysis, the site of symptom onset, the time from onset and diagnosis to noninvasive positive pressure ventilation application, ALS Functional Rating Scale-Revised, neurophysiological index, and the length of hospital stay were evaluated. The adherence to noninvasive positive pressure ventilation was defined as the use of noninvasive positive pressure ventilation for ≥ 2 h/day or ≥ 4 h/day. The correlations between noninvasive positive pressure ventilation adherence or length of hospital stay and other clinical parameters were analyzed. Fifty-one patients with ALS were included in the study. The time from onset and diagnosis to NIPPV application was reduced by 16 months in the adherent group than that in the non-adherent group; however, the parameters of blood gas analysis and pulmonary function tests did not differ significantly between the groups. Furthermore, the neurophysiological index of the abductor digiti minimi muscle was higher by 4.05 in the adherent group than that in the non-adherent group. The adherence to noninvasive positive pressure ventilation prolonged tracheostomy-free survival compared to that of non-adherence. Desaturation events, lower forced vital capacity, last pCO2, bicarbonate, and base excess, and higher differences in pCO2, were associated with an increase in the length of hospital stay. Noninvasive positive pressure ventilation application shortly after symptom onset and ALS diagnosis in patients with CO2 retention and reduced forced vital capacity can be considered for successful adherence. Adherence to noninvasive positive pressure ventilation may result in reduced tracheostomy conversion rates and prolonged tracheostomy-free survival.

P136 KL6 and IL-18 levels are negatively correlated with respiratory function tests and interstitial lung disease extent assessed on high-resolution computed tomography in patients with systemic sclerosis-related interstitial lung disease

Abstract Background/Aims Serum biomarkers have been suggested as indicators for pulmonary damage with clinical value in the diagnosis and prognosis of SSc-ILD. We aim to investigate the role of serum biomarkers (Krebs von den Lungen-6 KL-6, IL-18 and IL- 18BP) as potential biomarkers reflecting the severity of SSc-ILD as assessed through high-resolution computed tomography (HRCT) and pulmonary function tests (PFT). Methods A cross-sectional study including patients with SSc fulfilling the 2013 ACR/EULAR criteria was performed. Patients were classified according to disease duration and pulmonary involvement. All SSc patients underwent chest HRCT scans and pulmonary function test at baseline. Serum concentration of KL-6, IL8 and IL18BP were determined usingsandwich ELISA technique (solid phase sandwich Enzyme Linked-Immunosorbent Assay), with kits from MyBiosource for KL-6 and from Invitrogen for IL18 and IL18BP. A semiquantitative grade of ILD extent was evaluated through HRCT scan (grade 1, 0-20%; grade 2, >20%). Extensive lung disease was defined as > 20% of lung involvement on HRCT, and FVC <70% predicted and limited lung involvement as ≤ 20% of ILD involvement on HRCT,and an FVC ≥70% predicted. Results 74 patients were included, 27% were male, with a mean age of 57.5±15 years. 28 patients had ILD (38%). 64 % of patients had <20% of ILD extent classified through HRCT scan. SSc-ILD patients had elevated serum KL- 6 and IL-18 levels compared to patients without ILD (p = 0.003 and p = 0.04). A negative correlation between KL-6 levels and %FVC (β=-0.25, p 0.037) and %DLCO (β=-0.28, p 0.02) and between IL-18 levels and %FVC (β=-0.20, p 0.03) and %DLCO (β=-0.14, p 0.04) were found. Serum KL-6 and IL-18 levels successfully differentiated grades I and II (p = 0.028 and p = 0.021). Semiquantitative grades of ILD on the HRCT scan were significantly proportional to the KL-6 (p 0.01) and IL-18 (p = 0.03). A positive correlation between extensive lung disease and KL-6 (β = 0.61, p 0.007) but not with IL-18 was found. Conclusion Serum KL-6 levels and IL-18 were increased in patients with SSc-ILD and showed a positive correlation with ILD severity as measured using a semiquantitative HRCT grading scale and a negative correlation with PFT parameters. Disclosure C. Sieiro Santos: None. S. Calleja Antolín: None. J. de la Calle Lorenzo: None. E. Bollo de Miguel: None. E. Díez Álvarez: None.

Effect of Volatile Organic Compounds on Pulmonary Functions Among Paint Industry Workers of Unorganized Sectors.

Background Paint industry workers are constantly exposed to paints and organic solvents that contain a substantial quantity of volatile organic compounds (VOCs). Exposure to VOC emissions could result in pulmonary, neurobehavioral, and hematological consequences. Limited studies have been undertaken in India to assess the health consequences of VOCs among paint industry workers in unorganized sectors. Aim To assess the effects of VOCs on pulmonary function in paint industry workers of unorganized sectors. Methodology A hundred and twenty full-time male construction painters and small-scale paint manufacturing workers aged 25-60 were assessed for respiratory symptoms using a questionnaire, and pulmonary functions using Wright's Peak Expiratory Flow Meter (PEFR). Participants were randomly selected forVOC assessment andthe cumulative solvent exposure index was calculated. A pulmonary function test (PFT) was performed on a subset of construction painters (n=30) using a Koko spirometer. Results The concentration of VOCs such as benzene, ethylbenzene, toluene, and xylene (BETX) and dichloromethane levels exceeded American Conference of Governmental Industrial Hygienists (ACGIH)threshold limit values (TLVs) among the paint manufacturing workers. About 52% of paint workers reported respiratory symptoms. Around 22% of the participants showedreduced pulmonary function (PEFR<400 L/min). There was a significant weaknegativecorrelationbetween PEFR andwork experience (r = -0.2, p=0.03). PFT parameters among a subset of construction painters revealed a significant moderate negative correlation with work experience [forced expiratory volume at the onset of the first second (FEV1) (r = -0.6, p=0.001) and forced vital capacity (FVC) (r = -0.53, p=0.005)] and cumulative VOC exposure index [FEV1 (r = -0.53, p = 0.004) and FVC (r = -0.5, p = 0.008)]. Conclusion The concentration of VOCs was higher among paint industry workers of unorganized sectors and they reported respiratory symptoms and diminished pulmonary function. To reduce morbidity, it is critical to enhance awareness about occupational safety and services in these unorganized sectors.

Effects of donor smoking history on early post-transplant lung function measured by oscillometry.

Prior studies assessing outcomes of lung transplants from cigarette-smoking donors found mixed results. Oscillometry, a non-invasive test of respiratory impedance, detects changes in lung function of smokers prior to diagnosis of COPD, and identifies spirometrically silent episodes of rejection post-transplant. We hypothesise that oscillometry could identify abnormalities in recipients of smoking donor lungs and discriminate from non-smoking donors. This prospective single-center cohort study analysed 233 double-lung recipients. Oscillometry was performed alongside routine conventional pulmonary function tests (PFT) post-transplant. Multivariable regression models were constructed to compare oscillometry and conventional PFT parameters between recipients of lungs from smoking vs non-smoking donors. The analysis included 109 patients who received lungs from non-smokers and 124 from smokers. Multivariable analysis identified significant differences between recipients of smoking and non-smoking lungs in the oscillometric measurements R5-19, X5, AX, R5z and X5z, but no differences in %predicted FEV1, FEV1/FVC, %predicted TLC or %predicted DLCO. An analysis of the smoking group also demonstrated associations between increasing smoke exposure, quantified in pack years, and all the oscillometry parameters, but not the conventional PFT parameters. An interaction was identified between donor-recipient sex match and the effect of smoking. The association between donor smoking and oscillometry outcomes was significant predominantly in the female donor/female recipient group.

Induction of regulatory T cells and efficacy of low-dose interleukin-2 in systemic sclerosis: interventional open-label phase 1–phase 2a study

BackgroundSystemic sclerosis (SSc) is a chronic autoimmune disease, with impaired immune response, increased fibrosis and endothelial dysfunction. Regulatory T cells (Tregs), which are essential to control inflammation, tissue repair and...

PROGNOSTIC VALUE OF THE TRIGLYCERIDE-GLUCOSE INDEX IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE, ASTHMA AND THEIR OVERLAP

Considering that patients with concurrent COPD and asthma frequently have metabolic disorders, special attention should be given to their detection and subsequent correction, as their presence triggers mechanisms of mutual exacerbation, and their progression worsens the prognosis.The goal is to study the correlation between the triglyceride-glucose index, bioimpedance analysis parameters, and spirometry in patients with chronic obstructive pulmonary disease, asthma, asthma-COPD overlap, and comorbid type 2 diabetes.Materials and methods. 25 patients with COPD, 23 with asthma, 25 with asthma-COPD overlap (ACO), and 33 patients with ACO and diabetes mellitus type 2 were examined. The average age of patients was 57[52;67] in the COPD cohort, 52[50;65] for asthma, 51[43;52] for asthma-COPD overlap (ACO), and 60[53.5;65] for ACO with diabetes mellitus type 2. The parameters of external respiration were determined using the BTL 08 SpiroPRO spirometer (UK), bioimpedance analysis was carried out using the portable TANITA BC-601 device (Japan). The level of triglycerides (mmol/L) was determined by the colorimetric method, and fasting glucose was determined by the glucose oxidase method. The triglyceride-glucose index was calculated using the formula: TyG index = ln [fasting TG (mg/dL) x fasting glucose (mg/dL) / 2].Results. The following correlations were established: BMI and FEV1/FVC before bronchodilation (r = 0.23, p = 0.02) and SVC (r = -0.24, p = 0.01); % fat and FVC before bronchodilation (r = -0.23, p = 0.01), as well as SVC (r = -0.21, p = 0.03); visceral fat levels with FEV1 before and after bronchodilation (r = -0.36, p &lt; 0.001 and r = -0.35, p &lt; 0.001) and FVC before and after bronchodilation (r = -0.32, p &lt; 0.001 and r = -0.30, p &lt; 0.001) and SVC (r = -0.33, p &lt; 0.001); TyG and FEV1 before and after the bronchodilation test (r = -0.25, p = 0.01 and r = -0.28, p = 0.005), as well as FVC only after the use of bronchodilator (r = -0.25, p = 0.02).Conclusions. The bioimpedance analysis and TyG index correlate with pulmonary function test parameters (FEV1, FVC, FEV1/FVC ratio, SVC, MVV) in examined patients with COPD, asthma, ACO, and the combination of ACO and type 2 diabetes. Further research prospects. Further studies are needed to clarify the possibility of using the TyG index in clinical practice not only as an alternative indicator of insulin resistance but also as a marker of deteriorating lung function in case of airflow obstruction.

Evaluation of Pulmonary Function Tests, Dyspnea Scores, and Antibody Levels at the Six-Month Follow-Up of Patients Hospitalized for COVID-19 Pneumonia.

Coronavirus disease 2019(COVID-19) causes various signs and symptoms, especially lung involvement, during acute infection and in the long term. In this study, we evaluated the follow-up results of patients with chronic COVID-19 over a 24-week period. The study included a total of 100 post-COVID-19 patients (confirmed by real-time polymerase chain reaction (PCR) of a nasopharyngeal swab) who presented to the post-COVID-19 outpatient clinic with chronic COVID-19 symptoms 12 weeks after diagnosis, between April and June 2021. All of the patients in the study had a history of hospitalization and were grouped based on the severity of the acute COVID-19 infection (moderate: group 1, severe: group 2). A comparison of pulmonary function test parameters at week 12 showed that forced expiratory volume (FEV1)%, forced vital capacity(FVC)%, diffusing capacity of the lungs for carbon monoxide(DLCO)%, and DLCO divided by the alveolar volume (DLCO/VA)% values were significantly lower in group 2 than in group 1 (p<0.001 for all). At week 24, only DLCO and DLCO/VA values were lower (<0.001 for both). The mean modified Medical Research Council (mMRC) dyspnea scores of groups 1 and 2 were 1.4 ± 0.9 and 2.8 ± 1.1 at 12 weeks and improved to 0.9 ± 0.6 and 1.6 ± 0.6 at 24 weeks, respectively. The groups' mMRC scores at 12 and 24 weeks differed significantly (p=0.001, p=0.02). There was no difference in levels of IgM and IgG antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein between the groups at 12 or 24 weeks (p>0.05 for all). Improvement in pulmonary function parameters and mMRC scores may take longer than 24 weeks, especially in patients with severe COVID-19. Our results indicated that the levels of IgM and IgG neutralizing antibodies did not differ between patients with moderate and severe illness at 12 or 24 weeks.

Safety of partial selective COX-2 inhibitors in patients with cross-reactive NSAID hypersensitivity and factors affecting safety

Aims: Partial selective COX-2 inhibitors, such as nimesulide, or meloxicam are tolerated by the majority of the patients with cross-reactive NSAID hypersensitivity. This study aimed to obtain more information about the safety of partial selective COX-2 inhibitors; nimesulide and meloxicam in non-immunologic type, cross-reactive NSAID hypersensitivity and to detect risk factors for intolerance to these drugs.&#x0D; Methods: This is a retrospective study of patients with suggestive of cross-reactive NSAID hypersensitivity who admitted to our clinic over a period of 10 years. Patients who had a reliable history of immediate type NSAIDs hypersensitivity with at least 2 chemically unrelated class and/or positive ASA provocation test and who underwent alternative drug provocation test with partial selective COX-2 inhibitors (nimesulide and/or meloxicam) were included to study. Patients’ demographics, comorbidities, atopy status, duration of NSAID hypersensitivity, total number of reactions, reaction grades, clinical phenotypes, pulmonary function test parameters and results of alternative drug provocation test results are recorded. Patients with and without reactions during alternative provocation tests with nimesulide and/or meloxicam were compared in terms of these data. &#x0D; Results: A total of 560 patients were included in the study, 378 (67.5%) of them were female. Allergic comorbidities were detected in 394 (72.6%) patients. Asthma, other drug allergies and nasal polyp were the most common comorbidities. Alternative drug provocation test positivity with nimesulide and/or meloxicam was detected in 50 of 560 (8.9%) patients. Provocation test positivity was 33/541 (6.1%) with nimesulide, 30/517 (5.8%) with meloxicam and 13/498 (2.3%) with both nimesulide and meloxicam. Duration of NSAID hypersensitivity was shorter and allergic comorbidities, asthma, nasal polyp and the coexistence of asthma and nasal polyp were more common in patients with a positive provocation test.&#x0D; Conclusion: The partial selective COX-2 inhibitors nimesulide and meloxicam are well tolerated alternatives in patients with cross-reactive NSAID hypersensitivity. Hypersensitivity to these drugs is significantly higher in patients with asthma and/or nasal polyp than other group of cross-reactive NSAID hypersensitive patients and also in patients with a shorter duration of NSAID hypersensitivity.

Spirometric Assessment of Pulmonary Function Tests in Asthma Patients.

Asthma is a chronic airway inflammatory disorder that imposes substantial morbidity and mortality. Spirometry is a significant tool for the objective measurement ofobstruction amongasthmatics. The present study was conducted to assess the pulmonary function test parameters among asthmatics and compare the observed and predicted values. This cross-sectional research was performed on 120 asthmatic patients who attended a tertiary care healthcare center and underwent spirometry evaluation. The spirometry indices such as forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC ratio, peak expiratory flow rate (PEFR), and maximal voluntary ventilation (MVV) were recorded. Further, a gender-wise comparisonof spirometry indices was also done. There was a substantial decrease in FVC (2.05 ± 0.12 vs. 2.75 ± 0.24 L/sec; p = 0.02), FEV1 (1.78 ± 0.16 vs. 2.38 ± 0.32 L/sec; p = 0.01), FEV1/FVCratio (74 ± 4.38 vs. 83 ± 5.76 %; p = 0.01), PEFR (4.76 ± 0.42 vs. 5.82 ± 0.65 L/sec; p = 0.03), and MVV (78.65 ± 28.45 vs. 115.87 ± 32.15 L/min; p = 0.001) for observed andpredicted values.Female asthmatic patients displayed a substantial decline in FVC (p = 0.001), FEV1 (p = 0.006), FEV1/FVC (p = 0.001), and MVV (p = 0.01) when compared to males. This study suggests that asthmatic individuals had impaired lung function upon initial assessment.Female asthmatic patients studied are at increased risk of asthma severity when compared to males.

Pulmonary Function and Diffusing Capacity of Carbon Monoxide in Hypersensitivity Pneumonitis: An Observational Study of 152 Patients.

Hypersensitivity pneumonitis (HP) is an inflammatory and/or fibrotic lung disease. The restrictive lung function with low diffusing capacity of carbon monoxide (DLCO) is common in interstitial lung diseases (ILD). There are limited data on pulmonary function test (PFT) in HP and its role for diagnosis is questionable. We analyzed the data of 152 HP patients for type of defect, lung volume, and DLCO. The present study is a retrospective analysis of 152 patients at one of the tertiary chest institutes in India. All diagnosed cases with at least spirometry were included. PFT findings were classified and graded as obstructive, restrictive, and mixed patterns. The correlation of PFT was calculated with disease duration and 6MWT distance. The majority were female [106 (70%)], with a mean age of 47.8 ± 12.3 years. Spirometry with lung volume data were available for 97% patients. PFT was abnormal in 118 (80%) cases. Among the patterns of abnormality, the most common type was restrictive (74%) followed by mixed (15%) and obstructive (11%) with the majority in the severe to very severe grade. The mean total lung capacity (TLC) and residual volume (RV) were reduced, with the grade more severe when the pattern of abnormality was restrictive while the RV/ TLC was higher suggestive of air tapping. DLCO data were available for 132 (87%) cases, with levels decreased in 67%. The severity of DLCO was highest when the pattern of abnormality was restrictive. One of the PFT parameters was abnormal in 137 (90%) cases, with isolated decreased DLCO levels seen in 16 (10%) cases. Forced vital capacity (FVC), TLC, and DLCO showed positive correlation with 6MWT distance (FVC r = .22, P = .02; TLC r = .28, P = .003; DLCO r = .30, P = .002). The PFT abnormality is seen in >80% of HP patients. All types of abnormality were seen, with the restrictive pattern being the most common. Isolated decreased DLCO levels were seen in 10% of cases. We advised to do full PFT for diagnosis and followup of HP.

Personalized pulmonary rehabilitation program for patients with post-acute sequelae of COVID-19: A proof-of-concept retrospective study.

Long-COVID patients present with a decline in physical fitness. The aim of this study is to reveal the impact of pulmonary rehabilitation (PR) on physical fitness, quality of life (QoL), and parameters of quantified thorax CT. Long-COVID patients enrolled in a 3-month PR program were retrospectively studied. PR included endurance and resistance training three times a week. Assessments pre- and post-rehabilitation included quantified chest CT, pulmonary function tests (PFT), six-minute walk test (6MWT), cardiopulmonary exercise test, and questionnaires: Hospital Anxiety and Depression Scale, post-COVID-19 Functional Status scale, Borg score, and EuroQol. Seventeen subjects (5M/12F), mean age 42 ± 13 years, were included. PR improved all questionnaires' results significantly. Only significant difference in PFT parameters was correlation between baseline total lung capacity (TLC) and difference in TLC pre- and post-rehabilitation (p = 0.002). 6MWT increased from 329 to 365 m (p < 0.001), VO2max changed from 21 to 24 mL/kg/min (p = 0.007), peak load increased from 116 to 141 Watt (p < 0.001). Blood volume in small pulmonary vessels of 1.25 to 5 mm2 in cross-sectional area (BV5%) was higher than observed in patients with acute COVID-19 infection. After rehabilitation, BV5% decreased from 65% to 62% (p = 0.020). These changes correlated directly with changes in TLC (p = 0.039). Quantified CT airway volume increased after rehabilitation (p = 0.013). After rehabilitation, TLC tended to normalize due to (re)opening of small airways, with decline in air trapping and recruitment of alveoli. Furthermore, this study revealed that pulmonary rehabilitation can improve QoL and physical fitness in long-COVID patients.

Factors influencing long-term outcomes in fibrotic interstitial lung disease (F-ILD) diagnosed through multidisciplinary discussion (MDD): a prospective cohort study

BackgroundThe diagnostic process for fibrotic interstitial lung disease (F-ILD) is notably intricate, necessitating a multidisciplinary discussion to achieve consensus based on both clinical and radiological features. This study investigated the shared and distinctive long-term mortality predictors among the two primary phenotypes of F-ILD, namely idiopathic pulmonary fibrosis (IPF) and connective tissue disease-associated interstitial lung disease (CTD-ILD).MethodsWe included patients with F-ILD diagnosed from December 2018 to December 2019 and conducted follow-up assessments until February 2023. Age, gender, usual interstitial pneumonia (UIP) pattern, gender–age–physiology (GAP) score, modified Medical Research Council (mMRC) dyspnea score, antifibrotic agent use, pulmonary function test parameters, and six-minute walking test (6MWT) parameters were recorded at baseline and used as mortality predictors in a multivariate Cox regression model.ResultsWe enrolled 104 ILD patients. The survival rate of non-IPF patients was more than twice that of IPF patients (78.9% vs. 34%, p < 0.001), and the survival rate of patients with a GAP score of 0–2 was more than twice that of patients with a score of > 2 (93.2% vs. 36.6%, p < 0.001). Older age, male gender, definite UIP pattern, higher GAP score, higher mMRC dyspnea score, lower forced expiratory volume in one second/forced vital capacity (FEV1/FVC), shorter 6MWT distance, and lower initial and final SpO2 were also associated with higher long-term mortality (p < 0.05). In multivariable analysis, only a GAP score of > 2 (hazard ratio [HR]:16.7; 95% confidence interval [CI] 3.28–85.14; p = 0.001) and definite UIP pattern (HR: 4.08; 95% CI 1.07–15.5; p = 0.039) were significantly associated with overall mortality.ConclusionThe long-term mortality rate of IPF patients was higher than that of CTD-ILD patients. The GAP score and UIP patterns were significant mortality predictors for both IPF and CTD-ILD patients.

Early-life pulmonary viral infection leads to long-term functional and lower airway structural changes in the lungs.

Early-life respiratory virus infections have been correlated with enhanced development of childhood asthma. In particular, significant numbers of respiratory syncytial virus (RSV)-hospitalized infants go on to develop lung disease. It has been suggested that early-life viral infections may lead to altered lung development or repair that negatively impacts lung function later in life. Our data demonstrate that early-life RSV infection modifies lung structure, leading to decreased lung function. At 5 wk postneonatal RSV infection, significant defects are observed in baseline pulmonary function test (PFT) parameters consistent with decreased lung function as well as enlarged alveolar spaces. Lung function changes in the early-life RSV-infected group continue at 3 mo of age. The altered PFT and structural changes induced by early-life RSV were mitigated in TSLPR-/- mice that have previously been shown to have reduced immune cell accumulation associated with a persistent Th2 environment. Importantly, long-term effects were demonstrated using a secondary RSV infection 3 mo following the initial early-life RSV infection and led to significant additional defects in lung function, with severe mucus deposition within the airways, and consolidation of the alveolar spaces. These studies suggest that early-life respiratory viral infection leads to alterations in lung structure/repair that predispose to diminished lung function later in life.NEW & NOTEWORTHY These studies outline a novel finding that early-life respiratory virus infection can alter lung structure and function long-term. Importantly, the data also indicate that there are critical links between inflammatory responses and subsequent events that produce a more severe pathogenic response later in life. The findings provide additional data to support that early-life infections during lung development can alter the trajectory of airway function.

Pulmonaryfunction tests and their correlation with glycemic control in type 2 diabetes mellitus in a tertiary care centre

: Diabetes mellitus is one of the most common comorbidities and is the major risk factor for many diseases. This study is aimed at evaluating the pulmonary function tests in type 2 diabetes mellitus and their correlation with glycaemic control. The objective of this study is to evaluate pulmonary function test parameters in type 2 diabetes mellitus patients. To correlate pulmonary function tests with HbA1c. To evaluate association of pulmonary function tests in type 2 diabetics with duration of diabetes. : This is a cross-sectional study conducted over a period of one year on 30 diabetics with good glycaemic control and 30 diabetics with poor glycaemic control who were admitted or visited the outpatient department of the Department of General Medicine, and fulfilling the inclusion and exclusion criteria. Required history, general examination was done, lab results of HbA1c, FBS, PPBS were collected. Spirometry data collected and values of FVC, FEV1, FEV1/FVC, PEFR were analysed and restriction in lungs was found out. 60% of the uncontrolled diabetic patients were having a restrictive lung disease when compared to only 30% controlled diabetics having restrictive disease in their lungs. When comparing restriction in lungs in both groups with independent t test, it was found to be significant with a p- value of 0.019 (p value&amp;#60; 0.05 was considered significant at 95% confident interval).Hyperglycaemia is one of the risk factors for developing restrictive type of lung dysfunction. Adequate glycaemic control and timely pulmonary function testing and follow-up are very important to prevent pulmonary complications of lung.

Pulmonary Function Tests Post-Stroke. Correlation between Lung Function, Severity of Stroke, and Improvement after Respiratory Muscle Training.

Stroke is a significant cause of mortality and chronic morbidity caused by cardiovascular disease. Respiratory muscles can be affected in stroke survivors, leading to stroke complications, such as respiratory infections. Respiratory function can be assessed using pulmonary function tests (PFTs). Data regarding PFTs in stroke survivors are limited. We reviewed the correlation between PFTs and stroke severity or degree of disability. Furthermore, we reviewed the PFT change in stroke patients undergoing a respiratory muscle training program. We searched PubMed until September 2023 using inclusion and exclusion criteria in order to identify studies reporting PFTs post-stroke and their change after a respiratory muscle training program. Outcomes included lung function parameters (FEV1, FVC, PEF, MIP and MEP) were measured in acute or chronic stroke survivors. We identified 22 studies of stroke patients, who had undergone PFTs and 24 randomised controlled trials in stroke patients having PFTs after respiratory muscle training. The number of patients included was limited and studies were characterised by great heterogeneity regarding the studied population and the applied intervention. In general, PFTs were significantly reduced compared to healthy controls and predicted normal values and associated with stroke severity. Furthermore, we found that respiratory muscle training was associated with significant improvement in various PFT parameters and functional stroke parameters. PFTs are associated with stroke severity and are improved after respiratory muscle training.

Evaluation of exercise capacity in chronic obstructive pulmonary disease patients with pulmonary hypertension

Abstract Background Chronic obstructive pulmonary disease (COPD) is ordinarily associated with social and economic burden. Pulmonary hypertension attributed to COPD varies greatly among studies; and accounts for worse quality of life and hence increased morbidity and mortality. Aim This study aimed to evaluate impact of pulmonary hypertension on exercise capacity, and possible predictors for exercise intolerance among COPD patients. Methods Patients suffering from COPD (73 patients) were grouped according to echocardiographic assessment for the presence of pulmonary hypertension into two groups. The assessment included full clinical history, mMRC dyspnea scale, COPD assessment test, arterial blood gases before and after exercise testing, and assessment of resting pulmonary function test. Also transthoracic echocardiography, cardiopulmonary exercise testing (CPET) using incremental treadmill exercises protocol was done for all participants. Results A total of 39 (53.4%) COPD patients have pulmonary hypertension. COPD patients with pulmonary hypertension had significantly lower parameters of pulmonary function tests either pre or postbronchodilator; significantly lower pH, PaO2 and SaO2 either before or after CPET. It was found that all parameters of metabolic response during exercise were significantly lower among COPD-PH patients (P&lt;0.001). Pulmonary artery systolic pressure (PASP) showed significant negative correlations with peak VO2 (r=−0.514, P&lt;0.001), VO2/kg (r=−0.443, P&lt;0.001), oxygen pulse (% predicted) (r=−0.459, P&lt;0.001), oxygen saturation post exercise (r=−0.427, P&lt;0.001). Also PASP showed significant positive correlation with VE/VO2 (at peak) (r=0.374, P=0.001), VE/VCO2 (at peak) (r=0.609, P&lt;0.001). Predictors of poor exercise capacity among COPD patients included in the study were COPD-PH group (OR=8.84, 95%CI= 1.79–43.65), PASP (OR=1.11, 95% CI=1.02–1.15), forced expiratory volume (FEV1)% (OR=0.89, 95% CI=0.84–0.95) and mMRC (OR=3.10, 95% CI=1.13–8.47), CAT assessment (OR=1.37, 95% CI=1.14–1.65), MVV L/min (OR=0.91, 95% CI=0.86–0.96) and mean PAP (OR=1.16, 95% CI=1.11–1.29). Conclusion Pulmonary hypertension in patients with COPD is negatively correlated with exercise capacity, specifically peak VO2 percent predicted. Furthermore, pulmonary hypertension had a significant impact on gas exchange. Assessment of pulmonary hypertension using echocardiography among COPD patients is a valuable tool for predicting exercise impairment.

Pattern of pulmonary function tests in subjects recovered from COVID 19 infection

Introduction and Aim: The pulmonary sequelae of COVID-19 have not been extensively studied in the Indian population. This study was taken up with the aim to assess the pulmonary function tests (PFT) in subjects recovered from COVID-19. Material and Methods: In this observational cross-sectional study PFT was assessed in 50 adults in the age group of 18-60years. Rapid Antigen Testing was performed to rule out active COVID-19 infection. Subjects with acute or chronic respiratory illnesses that could affect lung functions were excluded. Results: We performed PFT on 50 subjects, with a mean age and BMI of 36.09 years and 25.17 kg/m2. Fatigue and/or breathlessness were the most common complaints present post-recovery. A normal PFT was found in 22 participants and 28 showed a restrictive pattern. Based on the severity of the disease they had experienced the study population was classified into three groups mild, moderate or severe COVID. The three groups were found to be comparable in their demographic parameters, the PFT parameters were significantly different between the groups with significantly lower values seen in subjects who recovered from severe COVID. Conclusions: Restrictive pattern on PFT was the common abnormality found in patients recovered from COVID-19. This finding emphasises the need for long-term follow-up and establishment of a plan of assessment and management in patients recovered from COVID-19.

Pulmonary Dysfunction in Patients with Cirrhosis of the Liver: A Study of Pulmonary Function Tests and Arterial Blood Gases.

Respiratory complications in liver cirrhosis can occur due to various mechanisms, such as ascites causing restricted lung expansion and opening of intrapulmonary vascular shunts due to high portal pressures. We aimed to study the effects of the liver dysfunction on the lungs by evaluating arterial blood gas (ABG) and pulmonary function test (PFT) of all study subjects. A cross-sectional study was done between August 2020 and September 2022. Diagnosed cases of the liver cirrhosis were enrolled in the study after informed consent and were subjected to the following investigations: chest X-ray, oximetry, spirometry, diffusing capacity of the lung for carbon monoxide (DLCO), two-dimensional echocardiography, and ABG analysis (ABGA). The cases were divided into three groups based on their Child-Pugh staging, and statistical analysis was done on the collected data. A total of 64 (53 males and 11 females) patients with an average age of 49.82 ± 9.89 years were studied. Alcoholism was the most common cause of cirrhosis in males. Breathlessness (65.6%) and pleural effusion (26.6%) were the most common respiratory symptoms and signs, respectively. Seventeen patients had hepatic hydrothorax, eight patients had hepatopulmonary syndrome (HPS), and six patients had portopulmonary hypertension. Low pH (17.2%) and oxygen partial pressure (PaO2) (20.3%) were the most common ABGA findings. The pH, PaO2, forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC), and DLCO were significantly low in Child Pugh Stage C (P < 0.05). The pH, pO2, HCO3, FEV1, FVC, FEV1/FVC, and DLCO were significantly lower in patients with HPS (P < 0.05). Metabolic acidosis and low FEV1/FVC and DLCO were the common findings in study subjects. Pulmonary dysfunction was common in advanced liver cirrhosis. Patients with HPS had worse ABG and PFT parameters than those without HPS.

Effect of pranayama on pulmonary functions and heart rate variability in patients with mild-to-moderate persistent bronchial asthma

Background: The global burden of bronchial asthma is on the rise. Asthma is a disorder of airflow obstruction associated with deranged pulmonary functions and autonomic imbalance. Though past studies have shown the beneficial effects of various asanas and breathing exercises in bronchial asthma, the role of such non-pharmacological alternative modalities in reducing morbidity and financial burden in patients is far from clear. Aims and Objectives: To assess the effect of Pranayama techniques on pulmonary functions and heart rate variability parameters in bronchial asthma patients. Materials and Methods: In our present study, we have recruited patients with mild-to-moderate bronchial asthma after taking written and informed consent. These patients were then asked to perform three pranayama techniques, namely Suryanadi, Bhastrika, and Kapalabhati pranayama, for 30 min a day, 3 days a week, for up to 4 weeks. Pulmonary function test parameters (forced vital capacity [FVC], forced expiratory volume in 1st s [FEV1], FEV1/FVC, peak expiratory flow rate) and Autonomic function test parameters (Time domain: mean HR, mean RR, NN50, pNN50, SDNN; Frequency domain: very low frequency (LF), LF, LF/high frequency (HF) ratio, total power) were compared before and after the intervention using a paired t-test. Results: After the intervention, improvements were recorded in pulmonary functions. Furthermore, pranayama was found to cause a shift in the sympathovagal balance toward the parasympathetic system. However, the changes recorded were not statistically significant. This shows further research in this field is required with a larger sample size, which may yield statistically significant data. Conclusion: Thus, we conclude that pranayama can be a useful alternative therapy for reducing morbidity and mortality in bronchial asthma patients.

Correlation of Indoor Air Pollutants with Pulmonary Function Test in Children Residing in Biomass Fuel Using Rural Houses of Central Karnataka

Abstract Background and Objectives: Approximately half the world uses biomass fuel for domestic energy, resulting in widespread exposure to indoor air pollution from biomass smoke. It is not clear what relationship exists between biomass use and pulmonary function. The aim of this study was to evaluate the effects of chronic exposure to biomass fuel smoke in children on pulmonary function test (PFT) parameters and its association with the particulate matter load. Materials and Methods: Children residing in rural houses in Central Karnataka using biomass fuel for cooking and heating water were selected and evaluated for PFTs by RMS Helios 401 spirometer. Particulate matter &lt;2.5 (PM2.5) concentrations were measured using an air quality pollution monitor. The association between PM2.5 and lung functions was studied. Results: A total of 150 children were included in the study. The study participants were assessed for the amount of exposure to particulate matter. Significant exposure to PM2.5 and hydrocarbons with a mean exposure of 42.25 mcg/m3 and 160.47 mg/m3, respectively, was recorded. Exposure to formaldehyde in the kitchen and living area showed a statistically significant decrease in forced vital capacity (FVC) and forced expiratory volume 1 (FEV1) and a normal FEV1/FVC ratio indicating a restrictive pattern. It also showed a statistically significant effect on forced expiratory flow 25%–75% indicating a small airway obstructive pattern. Conclusion: Long-term exposure to PM2.5 and formaldehyde from biomass fuel burning is associated with reduced lung function. This study reinforces the urgency of global strategies to mitigate indoor air pollution for the improvement of pulmonary health.