Lung Ventilation Function Research Articles

Effects of acetylcysteine on micro-inflammation and pulmonary ventilation in chronic obstructive pulmonary disease exacerbation

BACKGROUND Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is a serious complication of chronic obstructive pulmonary disease, often characterized by increased morbidity and mortality. In traditional Chinese medicine, AECOPD is linked to phlegm-heat and blood-stasis, presenting symptoms like thick sputum, fever, and chest pain. It has been shown that acetylcysteine inhalation in conjunction with conventional therapy significantly reduced inflammatory markers and improved lung function parameters in patients with AECOPD, suggesting that acetylcysteine may be an important adjunctive therapy for patients with phlegm-heat-blood stasis type AECOPD. AIM To investigate the effect of acetylcysteine on microinflammation and lung ventilation in patients with phlegm-heat and blood-stasis-type AECOPD. METHODS One hundred patients with phlegm-heat and blood-stasis-type AECOPD were randomly assigned to two groups. The treatment group received acetylcysteine inhalation (10% solution, 5 mL, twice daily) along with conventional therapy, whereas the control group received only conventional therapy. The treatment duration was 14 d. Inflammatory markers (C-reactive protein, interleukin-6, and tumor necrosis factor-alpha) in the serum and sputum as well as lung function parameters (forced expiratory volume in one second, forced vital capacity, and peak expiratory flow) were assessed pre- and post-treatment. Acetylcysteine inhalation led to significant reductions in inflammatory markers and improvements in lung function parameters compared to those in the control group (P < 0.05). This suggests that acetylcysteine could serve as an effective adjunct therapy for patients with phlegm-heat and blood-stasis-type AECOPD. RESULTS Acetylcysteine inhalation significantly reduced inflammatory markers in the serum and sputum and improved lung ventilation function parameters in patients with phlegm-heat and blood-stasis type AECOPD compared with the control group. These differences were statistically significant (P < 0.05). The study concluded that acetylcysteine inhalation had a positive effect on microinflammation and lung ventilation function in patients with this type of AECOPD, suggesting its potential as an adjuvant therapy for such cases. CONCLUSION Acetylcysteine inhalation demonstrated significant improvements in reducing inflammatory markers in the serum and sputum, as well as enhancing lung ventilation function parameters in patients with phlegm-heat and blood-stasis type AECOPD. These findings suggest that acetylcysteine could serve as a valuable adjuvant therapy for individuals with this specific type of AECOPD, offering benefits for managing microinflammation and optimizing lung function.

The status and influencing factors of lung ventilation function in employees exposed to dust in enterprises of the XPCC, China.

Occupational health is closely related to harmful factors in the workplace. Dust is the primary contributing factor causing impaired lung ventilation function among employees with dust exposure, and their lung ventilation function may also be influenced by other factors. We aimed at assessing the status and influencing factors of lung ventilation function among employees exposed to dust in the enterprises of the Eighth Division located in the Xinjiang Production and Construction Corps (XPCC), China. Employees exposed to dust in enterprises of the Eighth Division located in the XPCC in 2023 were selected as the subjects of this cross-sectional study. Their lung ventilation function indicators were extracted from health examination records, and an on-site electronic questionnaire survey was conducted among them. Binary logistic regression analyses were conducted to evaluate the factors influencing lung ventilation function. According to the fixed value criteria, the abnormal rates of forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and FEV1/FVC were 31.6, 1.4, and 0.4%, respectively. The lower limit of normal (LLN) criteria could overestimate the rate of abnormal lung ventilation function. Several factors were related to impaired lung ventilation function, including gender, age, education level, marital status, body mass index (BMI), smoking status, physical activity, the type of dust, industry, enterprise scale, occupation, length of service, working shift, monthly income, and respiratory protection. A relatively low abnormal rate of lung ventilation function was observed among employees exposed to dust in enterprises of the Eighth Division, XPCC, and their lung ventilation function was associated with various factors. Effective measures should be taken urgently to reduce the effects of adverse factors on lung ventilation function, thereby further protecting the health of the occupational population.

Impact of chlorpyrifos exposure on lung function in Egyptian adolescent agriculture workers

Chlorpyrifos (CPF) is a widely used organophosphate insecticide that has been linked to detrimental health effects that range from neurological impacts to respiratory disease. The objective of this study was to assess respiratory symptoms associated with CPF exposure throughout the application season. Urine samples were collected from Egyptian adolescent applicators (n = 206) and non-applicators (n = 72) to assess 3,5,6-trichloro-2-pyridinol (TCPy), a biomarker for CPF exposure, along with spirometry measures to determine lung ventilatory function. Samples were collected over 7 months in 2016. Logistic regression was used to model the odds of reporting wheeze symptoms based on urinary TCPy concentrations while controlling for age and smoking in the household. Ordinal multinomial logistic regression was used to model the percent reference for forced expiratory volume in one second (rFEV1) based on urinary TCPy concentration (µg/g creatinine). Wheezing increased with increasing pesticide exposure (OR = 1.74 (1.32 − 2.31)). There was no statistically significant relationship between rFEV1 and TCPy concentration. Efforts to reduce pesticide exposure should be implemented to prevent the potential onset or exacerbation of any linked respiratory complications in adolescents.

Clinical, functional and imaging parallels in the objective status of patients after community-acquired COVID-19-associated pneumonia

OBJECTIVE. To determine the dynamics of clinical symptoms in patients with community-acquired COVID-19-associated pneumonia, imaging and functional examination methods in the early post-acute period of the disease, establishing clinical, functional and imaging parallels in the objective status of patients.
 MATERIALS AND METHODS. We examined 56 patients after coronavirus disease (COVID-19). The severity of dyspnoea, anamnesis, objective status, pulse oximetry, lung ultrasound (LUS), computed tomography (CT) data, spirometry, body plethysmography, lung diffusion capacity were assessed. Non-parametric methods were used.
 RESULTS AND DISCUSSION. According to LUS 6 (10.7 %) patients had no pathological changes. Other patients had changes ranging from 3 to 11 points; 24 (48.0 %) had mild interstitial lung lesions, other – moderate. Every second patients showed signs of interstitial inflammation (single, multifocal, confluent B-lines), no more than three segments. Almost all patients (98.0 %) had single A-lines. LUSS was “recruited” mainly due to the LUS-pattern of consolidation (76.0 %) or thickened/ uneven pleura (90.0 %). The area of lung lesions on CT correlated with LUS (r=0.79; p<0.001).
 CONCLUSIONS. LUS is a highly sensitive method for visualising interstitial changes in the lungs in the post-acute period after COVID-19-associated pneumonia. Most often, there are no impairments in lung ventilation function, but about 20 % of patients require further examination.

Assessment of rehabilitation effectiveness in patients with COPD as part of the project "PulmoRehab – Access to healthcare services through a personalized care system for patients with COPD, including remote monitoring and tele-rehabilitation based on Artificial Intelligence methods"

Introduction. In the project “PulmoRehab – Access to Healthcare Services through a Personalized Patient Care System for COPD including Remote Monitoring and Tele-rehabilitation Based on Artificial Intelligence Methods,” SP ZOZ Specialized Hospital Ministry of Internal Affairs and Administration in Głuchołazy and 10 partners conducted research on tele-rehabilitation for people suffering from Chronic Obstructive Pulmonary Disease (COPD). The tele-rehabilitation program, based on personalized approach and technology, allowed patients to use therapy at home or a convenient location. The project aimed to reduce social inequalities in healthcare by providing remote access to health services for COPD patients. Materials and Methods. The study involved 80 patients aged 50 to 76 years, hospitalized at Ministry of Internal Affairs and Administration’s Specialist Hospital of St. John Paul II, meeting specific criteria. Qualification for the tele-rehabilitation program took into account the assessment of exercise tolerance, dyspnea, fatigue, lung ventilatory function, and saturation. The program included exercises adapted to the individual needs of the patients. Results. Analysis of the results conducted using XLSTAT software 2021.2.2 showed statistically significant differences between spirometric values before and after rehabilitation. Similarly, significant improvement was observed in the results of the 6MWT test and blood saturation. The tele-rehabilitation program proved effective in improving respiratory health parameters in COPD patients. Conclusions. 1. The tele-rehabilitation program improves lung ventilatory function in people with COPD. It reduces the feeling of dyspnea, decreases fatigue, improves SpO2, and increases exercise tolerance, demonstrating the beneficial effects of the rehabilitation applied. 2. The obtained results encourage further research on a representative group with the use of randomization.

Age-related features of the respiratory system functioning in women who experienced chronic stress caused by war

As ageing progresses, conditions are created for the pulmonary pathology development and exacerbation of its course. On the other hand, chronic stress leads to a disruption of the respiratory system's adaptive capabilities, which may contribute to pathological conditions development and accelerated ageing. Aim of the Study: the study aimed to assess the lung ventilation function state and bronchial patency in women who have experienced chronic stress caused by war (CSW). Subjects and Methods. A total of 91 women aged 31-78 years who experienced CSW and 79 women in the age group of 29-74 years who did not experience CSW were examined. To diagnose the state of stress, the anxiety level (personal and situational) was determined using the Spielberger-Hanin test. The biological age of the respiratory system was calculated using a developed formula. Results. The impact of CSW did not significantly affect lung ventilation function and bronchial patency in middle-aged and older women. In young women who experienced CSW, there was a decrease in bronchial patency compared to women who did not experience CSW. At the same time, in young women who experienced CSW, the ageing of the respiratory system was accelerated. Conclusions. CSW by war significantly does not affect lung ventilation function and bronchial patency in middle-aged and older women. However, in young women, CSW leads to a reduction in some indicators of bronchial patency. The impact of CSW results in the ageing of the respiratory system in young women. _________________________________________________________________________________________ Keywords: chronic stress caused by war (CSW), ageing, women, ventilation, bronchial patency

Atomization efficacy of a novel micro-dose mesh nebulizer (CVS-100) versus the traditional mesh nebulizer (M102) in adults with chronic obstructive pulmonary disease: A randomized non-inferiority clinical trial

ObjectiveTo compare the atomization efficacy of a novel micro-dose mesh nebulizer (CVS-100) versus the traditional mesh nebulizer (M102) in nebulizing a combination of ipratropium bromide and salbutamol for treatment of stable moderate-to-severe chronic obstructive pulmonary disease (COPD). MethodsA randomized, parallel, non-inferiority study was conducted. A total of 64 stable COPD patients were randomly assigned to either the experimental group or the control group in a 1:1 ratio. Each the experimental group received nebulized Combivent (Compound Ipratropium Bromide Solution) with CVS-100, while the control group received Combivent with M102. Lung ventilation function was measured before and 30 min after nebulization, and the difference in percentage of forced expiratory volume in the first second (FEV1) of predicted value (FEV1%pred), the forced expiratory flow at 50% (FEF50%), the forced expiratory flow at 75% (FEF75%), the mid-expiratory flow (FEF25-75%), and maximal voluntary ventilation (MVV) was evaluated. The non-inferiority margin for the lower 95% confidence limit was set at 3.5%. ResultsThe lower limit of the 95% confidence interval for the difference in FEV1%pred between the two groups was −1.83357, which was greater than −3.5. No significant differences were found in FEF50%, FEF75%, FEF25∼75%, MVV before and after nebulization between the two groups. ConclusionThe novel micro-dose mesh nebulizer (CVS-100) was found to be non-inferior to the traditional mesh nebulizer (M102) in terms of the change in FEV1%pred from baseline after nebulization. Similar results were observed for all other measures of efficacy.

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.

Lung morphology changes in patients with COVID-induced acute respiratory distress syndrome depending on the respiratory therapy options

Background. Morphologic examination of lung tissue in COVID-related acute respiratory distress syndrome is shown in publications predominantly regarding the course of disease but not the type of respiratory support. The aim of the single center study was to determine the influence of different types of respiratory therapy on morphologic findings in lung tissue of patients, who had died from COVID-19. Material and methods. The examined patients with COVID-related related acute respiratory distress syndrome (n = 30) were divided into three groups. Group 1 included those who received non-invasive lung ventilation in continuous positive airway pressure (CPAP) mode through a face mask (n = 10), group 2 consisted of patients who received oxygen therapy with a flow of 15 l/min through a rebreather mask (n = 10), and group 3 included people who underwent invasive lung ventilation through an endotracheal tube (n = 10). Results. In lung tissue of patients of group 1, we revealed prevalence of edema and hemorrhagic changes as well as discrepancy of diffuse alveolar damage (DAD) manifestations and duration of the disease. So, morphological manifestations of exudative phase of DAD were found even after 14 days of disease, and interstitial pneumonia with fibrosing alveolitis was observed only in 12.5 % of patients. The presence of dystelectasis, compensatory emphysema and thinning of the alveolar wall were typical morphological findings in the patients of group 2. Numerous hyaline membranes covered alveolar walls and led to a decrease in gas exchange area, alveolar-capillary block and were the cause of impaired lung ventilation function. Morphological signs of proliferative phase of DAD in patients of group 3 were accompanied by the development of alveolar fibrosis and secondary bacterial bronchopneumonia, especially in prolonged invasive lung ventilation. Conclusions. Low-flow oxygen therapy may lead to the progression of respiratory failure due to self-damaging of intact lung tissue. We have also revealed negative impact of invasive pulmonary ventilation on the number of bacterial complications and fibrosis stimulation. The most favorable morphologic changes were found in patients with non-invasive CPAP ventilation.

Complementation-reinforced network for integrated reconstruction and segmentation of pulmonary gas MRI with high acceleration.

Hyperpolarized (HP) gas MRI enables the clear visualization of lung structure and function. Clinically relevant biomarkers, such as ventilated defect percentage (VDP) derived from this modality can quantify lung ventilation function. However, long imaging time leads to image quality degradation and causes discomfort to the patients. Although accelerating MRI by undersampling k-space data is available, accurate reconstruction and segmentation of lung images are quite challenging at high acceleration factors. To simultaneously improve the performance of reconstruction and segmentation of pulmonary gas MRI at high acceleration factors by effectively utilizing the complementary information in different tasks. A complementation-reinforced network is proposed, which takes the undersampled images as input and outputs both the reconstructed images and the segmentation results of lung ventilation defects. The proposed network comprises a reconstruction branch and a segmentation branch. To effectively exploit the complementary information, several strategies are designed in the proposed network. Firstly, both branches adopt the encoder-decoder architecture, and their encoders are designed to share convolutional weights for facilitating knowledge transfer. Secondly, a designed feature-selecting block discriminately feeds shared features into decoders of both branches, which can adaptively pick suitable features for each task. Thirdly, the segmentation branch incorporates the lung mask obtained from the reconstructed images to enhance the accuracy of the segmentation results. Lastly, the proposed network is optimized by a tailored loss function that efficiently combines and balances these two tasks, in order to achieve mutual benefits. Experimental results on the pulmonary HP 129 Xe MRI dataset (including 43 healthy subjects and 42 patients) show that the proposed network outperforms state-of-the-art methods at high acceleration factors (4, 5, and 6). The peak signal-to-noise ratio (PSNR), structural similarity (SSIM), and Dice score of the proposed network are enhanced to 30.89, 0.875, and 0.892, respectively. Additionally, the VDP obtained from the proposed network has good correlations with that obtained from fully sampled images (r=0.984). At the highest acceleration factor of 6, the proposed network promotes PSNR, SSIM, and Dice score by 7.79%, 5.39%, and 9.52%, respectively, in comparison to the single-task models. The proposed method effectively enhances the reconstruction and segmentation performance at high acceleration factors up to 6. It facilitates fast and high-quality lung imaging and segmentation, and provides valuable support in the clinical diagnosis of lung diseases.

Analysis of related factors for postoperative recurrence of antrochoanal polyps in children

Objective:To analyze the correlation between nasal resistance and lung function in children with allergic rhinitis（AR）, and explore whether AR children with increased nasal resistance are accompanied by potential lower respiratory tract involvement. Methods:A total of 88 children diagnosed with AR from December 2021 to December 2022 were selected as the study group, while 20 normal children were selected as the control group during the same period. Both the study group and the control group children underwent lung function tests, bronchodilator tests, and nasal resistance measurements. Spearman correlation analysis and multiple linear regression analysis were performed on the results of nasal resistance and lung function tests to explore the relationship and influencing factors between the two groups.According to the results of nasal resistance measurement, children with increased nasal resistance and abnormal lung function were divided into a mild increase in nasal resistance with abnormal lung function group and a moderate to severe increase in nasal resistance with abnormal lung function group. The degree of increased nasal resistance was analyzed to determine whether it would affect lung function. Results:The FEF25, FEF50, and FEF75 levels in the study group were significantly lower than those in the control group（P<0.05）. The FEV1of children with moderate to severe increase in AR nasal resistance was significantly lower than that of children with mild increase in AR nasal resistance（P<0.05）. There was a correlation between nasal resistance and FEV1/FVC, R20 in AR children, and FEV1/FVC, R20 were the influencing factors of nasal resistance in AR children（P<0.05）. There was no correlation between total serum IgE, lung function, and bronchodilation test in AR patients（P>0.05）. Conclusion:The nasal ventilation function of AR patients has changed, and there is a downward trend in small airway function. Children with moderate to severe increase in AR nasal resistance have a more significant decrease in lung ventilation function than those with mild increase. The nasal resistance of AR children is influenced by FEV1/FVC and R20, and FEV1/FVC and R20 decrease as the nasal resistance value increases. The improvement rate of lung function and FEV1 are not influencing factors for the elevation of total serum IgE.

PECULIARITIES OF PULMONARY VENTILATION RESPONSE TO DOSED HYPOXIA IN ELDERLY PEOPLE WITH IMPAIRED GLUCOSE TOLERANCE.

The aim: To determine the peculiarities of the response of pulmonary ventilation to hypoxia in elderly people with impaired glucose tolerance. Materials and methods: Forty-three elderly people were examined, including 20 patients with impaired glucose tolerance and 23 healthy individuals with preserved glucose tolerance. Fasting plasma glucose and insulin concentrations were determined, and the HOMA-IR insulin resistance index was calculated. Under conditions of normoxia and during a dosed hypoxic test (12% oxygen, duration 20 min), blood saturation and lung ventilation parameters were monitored. Results: Under conditions of normoxia, the indicators of lung ventilation function did not differ between the groups of elderly people with impaired and preserved glucose tolerance. Under conditions of hypoxia, elderly people with impaired glucose tolerance had a less significant increase in ventilation, despite the development of more severe arterial hypoxemia. This leads to a decrease in the ventilatory response to hypoxia in case of impaired carbohydrate metabolism. Conclusions: In people with impaired glucose tolerance, a less significant ventilatory response to hypoxia is combined with more pronounced insulin resistance.

The value of home monitoring of exhaled nitric oxide and mobile pulmonary function in the management of asthma

Objective: To investigate the application value of household dynamic monitoring of exhaled nitric oxide (FeNO) and pulmonary ventilation function in daily management of asthma. Methods: A total of 22 untreated patients with uncontrolled asthma who visited the Respiratory Disease Clinic of China-Japan Friendship Hospital from October 2019 to December 2020 were enrolled. Demographic characteristics, asthma history, comorbidities, asthma control test (ACT), and mini-asthma quality of life questionnaire (mini-AQLQ) were collected through face-to-face surveys. FeNO, pulmonary ventilation function, sputum eosinophil ratio and blood eosinophil count before treatment were collected through medical records. During the treatment of inhaled corticosteroids (ICS), the subjects were monitored at home for 4 weeks by FeNO analyzer and mobile electronic vital capacity at fixed time in the morning and evening. After the treatment, the above indicators were measured again to evaluate the treatment effect. Diurnal and dynamic changes of FeNO and pulmonary ventilation function monitored at home during treatment were analyzed. Results: The age of the subjects was (40±14) years, and 14 cases were female. After 4 weeks of ICS treatment, ACT score, mini-AQLQ score, forced expiratory volume at 1 second (FEV1, L) and FEV1/forced vital capacity (FVC, %) were 23±2, 5.49±1.04, 2.89±0.60 and 72.2±7.8, respectively, higher than before treatment [16±4, 4.06±0.95, 2.47±0.76 and 66.4±14.3, respectively]. FeNO [ppb (part per billion)], sputum eosinophil percentage (%) and blood eosinophil levels (×106/L) [M (Q1, Q3)] were 27 (18, 47), 2.8 (1.0, 14.0) and 255 (188, 280), respectively, lower than before treatment [80 (56, 117), 25.8 (15.0, 59.6) and 380 (283, 658)] (all P values<0.05). The level of FeNO in the morning was higher than that in the evening 2 weeks before routine monitoring (P=0.028), and no statistical difference was found in pulmonary ventilation function between day and night (P>0.05). The curve fitting of daily monitoring of FeNO and lung ventilation function showed that FeNO and lung ventilation function were gradually improved, and the effective time of treatment determined by FeNO was 3.5 (3.0, 5.3) d, which was earlier than all lung ventilation function indicators (all P values<0.05). The maximum action time of FeNO was (14.5±2.2) d, which was earlier than that of FEV1 (20.7±2.8) d (all P values<0.05), but there was no statistically difference between the maximum effect time determined by other lung ventilation function indicators (all P values>0.05). Conclusion: Household dynamic daily monitoring of FeNO and pulmonary ventilation function can be used to assess the response to ICS treatment, with FeNO being the more sensitive indicator.

Different functional lung-sparing strategies and radiotherapy techniques for patients with esophageal cancer.

BackgroundIntegration of 4D-CT ventilation function images into esophageal cancer radiation treatment planning aimed to assess dosimetric differences between different functional lung (FL) protection strategies and radiotherapy techniques.MethodsA total of 15 patients with esophageal cancer who had 4D-CT scans were included. Lung ventilation function images based on Jacobian values were obtained by deformation image registration and ventilation imaging algorithm. Several different plans were designed for each patient: clinical treatment planning (non-sparing planning), the same beam distribution to FL-sparing planning, three fixed-beams FL-sparing intensity-modulated radiation therapy (IMRT) planning (5F-IMRT, 7F-IMRT, 9F-IMRT), and two FL-sparing volumetric modulated arc therapy (VMAT) planning [1F-VMAT (1-Arc), 2F-VMAT (2-Arc)]. The dosimetric parameters of the planning target volume (PTV) and organs at risk (OARs) were compared and focused on dosimetric differences in FL.ResultsThe FL-sparing planning compared with the non-sparing planning significantly decreased the FL-Dmean, V5-30 and Lungs-Dmean, V10-30 (Vx: volume of receiving ≥X Gy), although it slightly compromised PTV conformability and increased Heart-V40 (P< 0.05). The 5F-IMRT had the lowest PTV-conformability index (CI) but had a lower Lungs and Heart irradiation dose compared with those of the 7F-IMRT and 9F-IMRT (P< 0.05). The 2F-VMAT had higher PTV-homogeneity index (HI) and reduced irradiation dose to FL, Lungs, and Heart compared to those of the 1F-VMAT planning (P< 0.05). The 2F-VMAT had higher PTV conformability and homogeneity and decreased FL-Dmean, V5-20 and Lungs-Dmean, V5-10 but correspondingly increased spinal cord-Dmean compared with those of the 5F-IMRT planning (P< 0.05).ConclusionIn this study, 4D-CT ventilation function image-based FL-sparing planning for esophageal cancer can effectively reduce the dose of the FL. The 2F-VMAT planning is better than the 5F-IMRT planning in reducing the dose of FL.

Proprietary Model of Qualification for In-Hospital Rehabilitation after COVID-19.

Background: Since the beginning of the SARS-CoV-2 epidemic in Poland, 6,128,006 people have been diagnosed, of which 116,798 died. Patients who recovered from COVID-19 and require rehabilitation due to varied impairments should be provided an opportunity to participate in an individualized, complex rehabilitation program starting from acute care and being continued in the post-acute and long-term rehabilitation phase. It is recommended to offer out-patient and in-hospital rehabilitation procedures depending on the type and persistence of symptoms and dysfunctions. The aim of this paper is to present the qualification process of post-COVID19 patients for an in-hospital complex rehabilitation program developed on the basis of pulmonary physical therapy. Methods: The presented qualification program was developed on the basis of clinical experience of over 2000 patients participating in the pilot program of in-hospital rehabilitation launched in September 2020 and based on the Regulation of the Polish Minister of Health of 13 July 2020. Results: The proposed model of patients’ qualification rests on well-known and validated tools for functional assessment: exercise tolerance assessment, dyspnea intensity assessment, functional fitness assessment, assessment of arterial blood saturation, lung ventilation function assessment, assessment of long-lasting COVID-19 symptoms, and patient’s basic mental health condition. Conclusions: The proposed qualification model for the post-COVID rehabilitation program allows us to introduce adequate qualifications followed by much needed assessment of the health effects.

Clinical observation on filiform-fire needling of "Biaoben acupoint combination" for 33 cases of sequelae of coronavirus disease 2019 during recovery period

To observe the clinical therapeutic effect of filiform-fire needling of "Biaoben acupoint combination" on the sequelae of patients with coronavirus disease 2019 (COVID-19) during the recovery period. A total of 33 patients with COVID-19 during the recovery period were treated with filiform-fire needling at the acupoints of Mingmen (GV 4), Shenzhu (GV 12), Gaohuang (BL 43), Zusanli (ST 36) and Shangjuxu (ST 37), etc., once every other day, 3 times a week, and 3 times was one course of treatment and totally 2 courses of treatment were required. The TCM symptom, Hamilton anxiety scale (HAMA) and Hamilton depression scale (HAMD) scores, pulmonary function indexes (forced vital capacity [FVC], forced expiratory volume in one second [FEV1], peak expiratory flow [PEF]) and chest CT imaging change were observed before and after treatment, and the therapeutic effect was evaluated. After treatment, the scores of TCM symptom, HAMA and HAMD were decreased compared with those before treatment (P<0.05), and the levels of FVC, FEV1 and PEF were increased compared with those before treatment (P<0.05), and the recovery rate of 22 patients with pulmonary ventilation dysfunction was 86.4% (19/22). After treatment, the lung shadow area was smaller than that before treatment (P<0.05). The effective rate of 25 patients with lung CT abnormalities was 84.0% (21/25). After treatment, 23 cases were cured, 5 cases were markedly effective, 4 cases were effective, 1 case was ineffective, the cured and markedly effective rate was 84.8%. The filiform-fire needling of "Biaoben acupoint combination" could significantly reduce the sequelae of cough, fatigue, chest tightness, etc. and mental symptoms such as anxiety and depression in patients with COVID-19 during the recovery period, and promote inflammatory exudation absorption of pulmonary lesion and improve lung ventilation function.

Evaluation of the factors affecting lung function in pediatric patients with asthma

Purpose This study aimed to analyze the risk factors affecting lung function in children with asthma based on clinical data to advice on clinical treatment and prognosis. Methods This study included newly diagnosed patients with asthma admitted to the Respiratory Department of Chengdu Women’s and Children’s Central Hospital in Sichuan from July 2020 to June 2021. The factors associated with lung function were analyzed using univariate and multivariate linear regression with the forward method, while factors affecting lung ventilation function were analyzed using multivariate logistic regression. Results Sixty percent of the patients had normal lung function. Age was significantly negatively correlated with forced vital capacity (FVC)/FVCpredicted (B = –1.385, p = 0.001), FEV1/FEV1predicted (B = –2.092, p < 0.001), and FEV1%/FEV1%predicted (B = –0.834, p = 0.001). Body mass index (BMI) for age Z score (B = 1.661, p = 0.045) and cesarean delivery (B = 4.471, p = 0.013) were significantly positively correlated with FVC/FVCpredicted. Birth weight was significantly positively correlated with FEV1/FEV1predicted (B = 4.593, p = 0.027). Multivariate logistic regression analysis revealed that age ≥6 years and cough variant asthma (CVA) were risk factors for abnormal lung function. Conclusions Age, BMI for age Z score, mode of delivery, and birth weight were significantly correlated with lung function in children with asthma. Furthermore, children with asthma and normal lung function were more likely to be overlooked. More attention should be given to children with asthma and normal lung function, and CVA.

Molecular mechanism of betulin palliative therapy for chronic obstructive pulmonary disease (COPD) based on P2X7 receptor target of gated ion channel

BackgroundThe aim of this study was to discover the molecular mechanism of betulin palliative therapy for chronic obstructive pulmonary disease (COPD) based on the P2X7 receptor target of gated ion channel.MethodsA COPD mouse model was developed. Changes in pulmonary ventilation function, pulmonary airway and vascular remodeling indicators, inflammatory cells, and inflammatory factors were determined after betulin intervention, and the pathological alterations of lung tissues were detected. An in vitro experimental model was constructed to observe the influence of betulin at varying concentrations on the proliferation of human bronchial epidermal cell line (16-HBE) cells and changes in inflammatory factors in cell supernatant. The expression levels of key proteins in 16-HBE cells transfected with overexpressed or silenced P2X7 genes were determined through quantitative reverse transcription polymerase chain reaction (RT-qPCR) and Western blot.ResultsAfter betulin intervention, pulmonary ventilation function in the 20 mg/kg betulin and 40 mg/kg betulin groups was improved. Levels of white blood cells (WBCs), neutrophils (Ns), tumor necrosis factor (TNF), TNF-ɑ, interleukin (IL)-1β, and IL-6 in the 2 groups also decreased significantly (all P<0.05). The pathological changes in COPD mice were detected. After betulin intervention, the pathological injury of the lung was reduced, the pathological score decreased significantly, and the remodeling indicators of pulmonary airway and pulmonary vessels diminished remarkably (all P<0.05). Betulin had no effect on the proliferation of 16-HBE cells in vitro. After cigarette smoke extract (CSE) stimulation, the rate of survival for 16-HBE cells decreased significantly. After betulin treatment, the survival rate of 16-HBE cells augmented remarkably, and the levels of TNF-ɑ, IL-6, and IL-1β in cell supernatant reduced substantially (all P<0.05). 16-HBE with overexpression and knockdown of P2X7 was constructed. After being treated with betulin, the relative expression levels of messenger RNA (mRNA) of ERK, JNK, rho-associated protein kinase (ROCK), nuclear factor-κB (NF-κB), and p38 in 16-HBE cells with P2X7 overexpression or knockdown were decreased significantly (all P<0.05), but the above indicators were largely unchanged (all P>0.05).ConclusionsBetulin relieved lung pathological injury, ameliorated lung ventilation function, and diminished the level of inflammatory factors in COPD mice, playing a therapeutic role via the P2X7 signaling pathway.

Effects of Inhaled Corticosteroids on Lung Function in Children With Post-infectious Bronchiolitis Obliterans in Remission.

BackgroundPost-infectious bronchiolitis obliterans (PIBO) is a rare and irreversible chronic obstructive pulmonary disease with no specific treatment, especially for patients with PIBO in remission. In this study, we evaluated the effects of continuous inhaled corticosteroids (ICSs) and intermittent ICSs on lung function in the remission of PIBO.MethodsThis was a retrospective study, and all the subjects we included were divided into continuous ICS group and intermittent ICS group according to treatment regimens. Patients in continuous ICS group received continuous ICSs (2 times a day), and patients in intermittent ICS group received intermittent ICSs (inhaled corticosteroids after acute respiratory tract infection or wheezing). Different lung function tests were performed at different ages. Tidal breathing lung function tests were performed in patients with PIBO aged ≤ 5 years, and the lung ventilation function test and the bronchial dilation test were performed in patients with PIBO aged more than 5 years. Lung function was assessed at the beginning of follow-up and at the end of follow-up (1 year of ICSs).ResultsAfter 1 year of ICSs, patients aged more than 5 years, forced vital capacity (FVC), and forced expiratory volume in 1 s (FEV1) were significantly higher than at the beginning of follow-up. After 1 year of ICSs, the difference in VT/Kg, TPTEF/TE, and VPEF/VE between the end and the beginning of follow-up in continuous ICS group shows an upward trend. But those showed a downward trend in intermittent ICS group. FVC, FEV1, and maximal mid-expiratory flow velocity 25–75% (MMEF25–75%) of continuous ICS group were significantly higher than at the beginning of follow-up. The difference in FEV1 and MMEF25–75% between the end of follow-up and the beginning of follow-up in continuous ICS group was significantly higher than that in intermittent ICS group. A total of 52.94% of patients with PIBO aged more than 5 years were positive for bronchial dilation tests.ConclusionInhaled corticosteroids can effectively improve lung function and relieve airway obstruction in patients aged more than 5 years in PIBO remission, especially continuous ICSs. Patients with PIBO may have reversible airflow limitations.

Abnormal dynamic ventilation function of COVID-19 survivors detected by pulmonary free-breathing proton MRI.

ObjectivesTo visualize and quantitatively assess regional lung function of survivors of COVID-19 who were hospitalized using pulmonary free-breathing 1H MRI.MethodsA total of 12 healthy volunteers and 27 COVID-19 survivors (62.4 ± 8.1 days between infection and image acquisition) were recruited in this prospective study and performed chest 1H MRI acquisitions with free tidal breathing. Then, conventional Fourier decomposition ventilation (FD-V) and global fractional ventilation (FVGlobal) were analyzed. Besides, a modified PREFUL (mPREFUL) method was developed to adapt to COVID-19 survivors and generate dynamic ventilation maps and parameters. All the ventilation maps and parameters were analyzed using Student’s t-test. Pearson’s correlation and a Bland-Altman plot between FVGlobal and mPREFUL were analyzed.ResultsThere was no significant difference between COVID-19 and healthy groups regarding a static FD-V map (0.47 ± 0.12 vs 0.42 ± 0.08; p = .233). However, mPREFUL demonstrated lots of regional high ventilation areas (high ventilation percentage (HVP): 23.7% ± 10.6%) existed in survivors. This regional heterogeneity (i.e., HVP) in survivors was significantly higher than in healthy volunteers (p = .003). The survivors breathed deeper (flow-volume loop: 5375 ± 3978 vs 1688 ± 789; p = .005), and breathed more air in respiratory cycle (total amount: 62.6 ± 19.3 vs 37.3 ± 9.9; p < .001). Besides, mPREFUL showed both good Pearson’s correlation (r = 0.74; p < .001) and Bland-Altman consistency (mean bias = −0.01) with FVGlobal.ConclusionsDynamic ventilation imaging using pulmonary free-breathing 1H MRI found regional abnormity of dynamic ventilation function in COVID-19 survivors.Key Points• Pulmonary free-breathing1H MRI was used to visualize and quantitatively assess regional lung ventilation function of COVID-19 survivors.• Dynamic ventilation maps generated from 1H MRI were more sensitive to distinguish the COVID-19 and healthy groups (total air amount: 62.6 ± 19.3 vs 37.3 ± 9.9; p < .001), compared with static ventilation maps (FD-V value: 0.47 ± 0.12 vs 0.42 ± 0.08; p = .233).• COVID-19 survivors had larger regional heterogeneity (high ventilation percentage: 23.7% ± 10.6% vs 13.1% ± 7.9%; p = .003), and breathed deeper (flow-volume loop: 5375 ± 3978 vs 1688 ± 789; p = .005) than healthy volunteers.Supplementary InformationThe online version contains supplementary material available at 10.1007/s00330-022-08605-w.