Baseline Exercise Tolerance and Perceived Dyspnea to Identify the Ideal Candidate to Pulmonary Rehabilitation: A Risk Chart in COPD Patients

Study of the effectiveness of telemedicine-based pulmonary rehabilitation in recovered patients of COVID-19 pneumonitis

Objective

To determine the effectiveness of the telemedicine-based pulmonary rehabilitation programme in COVID-19 pneumonitis.

Design

Prospective intervention study.

Setting

Rehabilitation outpatient department, Tertiary-Care institute.

Participants

Consecutive sample of patients (N = 50) in recovered COVID-19 infection.

Intervention

Six weeks of telemedicine-based pulmonary rehabilitation in recovered patients of COVID-19 infection.

Outcome Measures

All patients were clinically assessed by six minutes walk test (6MWT), Modified Medical Research Council Scale (mMRC), 30s-STS and SF 36 at zero week and six weeks post-intervention.

Statistical Analysis

Difference in means of pre- and post-intervention was compared using paired t-test. A P value <0.05 was considered statistically significant.

Results

The 6MWT, mMRC Scale, 30 seconds sit-to-stand test, and WHO QoL scale-SF 36 were assessed and post-rehabilitation sessions, all the patients' showed improvement in the prescribed parameters. After six weeks of respiratory rehabilitation, the distance covered in the 6MWT was significantly longer than that of before the intervention. There was a significant difference between zero and six weeks during the PR intervention. mMRC and 30s-STS results showed a significant difference between zero and six weeks (2.36 ± 0.598, 4.54 ± 1.94. Quality of life improved significantly after six weeks of pulmonary rehabilitation in eight domains of the SF-36.

Conclusion

Six-week pulmonary rehabilitation programme delivered through telemedicine platform improves respiratory function, QoL and anxiety in patients with post-COVID-19 pneumonia during a recovery phase.

Correlation Between Diaphragmatic Excursion and Exercise Tolerance Improvement Following Pulmonary Rehabilitation in Patients with Chronic Obstructive Pulmonary Disease-Obstructive Sleep Apnea Overlap Syndrome

Purpose

We assess the predictive value of diaphragm excursion (DE) in enhancing exercise tolerance following pulmonary rehabilitation (PR) among patients with COPD-OSA overlap syndrome.

Material and Methods

This prospective cohort study enrolled 63 patients diagnosed with COPD-OSA overlap syndrome who actively participated in a PR program from January 2021 to May 2023. Among these, 58 patients successfully completed the 20-week PR program, with exercise tolerance assessed through the measurement of six-minute walk distance (6MWD), and DE evaluated by ultrasonography. The responder to PR in terms of exercise ability was defined as a patient who showed an increase of >30m in 6MWD. The cutoff value for predicting PR response based on DE was determined using receiver operating characteristic (ROC) curves.

Results

Following the PR program, significant improvements were observed in mMRC, 6MWD, DE during deep breathing, and diaphragm thickness fraction (DTF). Of the participants, 33 patients (57%) were classified as responders, while 25 patients (43%) were considered non-responders. Baseline values of FEV1% predicted, 6MWD, DE during deep breathing, DTF, and PaO2 exhibited a significant elevation in responders as compared to non-responders. The changes of 6MWD were positively associated with the baseline values of DTF and DE during deep breathing, FEV1% predicted and PaO2, while negatively correlated with baseline value of mMRC. The predictive performance in terms of the area under the ROC curve for determining responder's DTF was found to be 0.769, accompanied by a sensitivity of 85% and specificity of 68%, using a cutoff value at 17.26%. Moreover, it was observed that DE during deep breathing could predict the area under the ROC curve for responders to be 0.753, with a sensitivity of 91% and specificity of 56% at a cutoff value of 3.61cm.

Conclusion

Diaphragm excursion serves as a valuable predictor for determining the enhancement of exercise tolerance following PR in patients with COPD-OSA overlap syndrome.

Trial Registration

ChiCTR1800020257, www.chictr.org.cn/index.aspx.

Predictors of Success of Inpatient Pulmonary Rehabilitation Program in COPD Patients

Purpose

Pulmonary rehabilitation programs (PR) are an important part of the comprehensive treatment of patients with chronic pulmonary diseases. Patients respond individually to PR. The aim of this study is to identify potential predictors of success of PR to recognise patients who benefit most and to uncover possible reasons for poor response to PR.

Patients and Methods

We included 121 patients with chronic obstructive pulmonary disease (COPD) who completed our 4-week inpatient PR without any exacerbations of disease during PR that could potentially affect PR outcomes. Improvement in distance of ≥30 m on the 6-minute walk test (6MWT) after PR was chosen as a primary marker of physical success. Ninety-one patients achieved improvement of ≥30 m on the 6MWT and were thus considered good responders, and 30 patients were poor responders with improvement in the distance of <30 m on the 6MWT.

Results

We compared baseline clinical characteristics, medication, lung function, physical capacity, body composition, and laboratory blood tests between groups of good and poor responders. The most prominent differences between groups were associated with differences in baseline body composition and erythrocyte-related parameters. Good responders had significantly lower body water content (p = 0.042) and higher body weight (p = 0.036), body fat content (p = 0.049), dry lean mass (p = 0.021), haemoglobin levels (p = 0.040), erythrocyte count (p = 0.017), haematocrit (p = 0.030) and iron level (p = 0.028).

Conclusion

A more muscular body composition and a higher ability to transport oxygen from the blood to the muscles could be beneficial for the outcome of PR.

Chronic Obstructive Pulmonary Disease Patients With High Peripheral Blood Eosinophil Counts Have Better Predicted Improvement in 6MWD After Rehabilitation: A PRELIMINARY STUDY

PURPOSE

The objective of this investigation was to determine whether chronic obstructive pulmonary disease (COPD) patients with high blood eosinophil (EOS) counts had better improvement in 6-min walk test (6MWT) after pulmonary rehabilitation (PR).

METHODS

Fifty COPD patients were randomly assigned to either the rehabilitation group (RG) or the control group (CG). Patients in the RG (8 wk PR + routine medication) and the CG (routine medication) were followed for 32 wk. According to the blood EOS level, the RG was divided into an EOS ≥ 200 cells/μL group and EOS < 200 cells/μL group. The 6MWT distance, Borg Scale, and COPD Assessment Test (CAT) were evaluated before intervention and 8 wk and 32 wk later.

RESULTS

After the 8-wk intervention, 37 patients (19 RG/18 CG) completed the study. At 8-wk and 32-wk follow-up from baseline, a statistically significant difference was found between these two groups in the 6MWT, Borg Scale, and CAT. Compared with baseline, the 6MWT in the RG increased 49.1 ± 40.2 m (95% CI, 29.7-68.5, P < .001) at 8 wk and 60.8 ± 42.1 m (95% CI, 40.5-81.6, P < .001) at 32 wk. In addition, the improvement of 6MWT in the EOS ≥ 200 cells/μL RG group was higher than that in the EOS < 200 cells/μL group (40.1 ± 17.6 m, 95% CI, 36.8-43.4; P = .036) at 32-wk follow-up from baseline.

CONCLUSION

An 8-wk PR can improve the exercise capacity of COPD patients, and the benefits persistent for 24 wk. The improvement in the 6MWT was more significant in COPD patients with a high blood EOS count.

Dyspnea: a map of Cochrane evidence relevant to rehabilitation for people with post COVID-19 condition

INTRODUCTION

Rehabilitation focuses on impairments, activity limitations and participation restrictions being informed by the underlying health condition. In the current absence of direct "evidence on" rehabilitation interventions for people with post COVID-19 condition (PCC), we can search and synthesize the indirect "evidence relevant to" coming from interventions effective on the symptoms of PCC in other health conditions. The World Health Organization (WHO) required this information to inform expert teams and provide specific recommendations in their Guidelines. With this overview of reviews with mapping we aimed to synthesize in a map the Cochrane evidence relevant to rehabilitation for dyspnea due to PCC.

EVIDENCE ACQUISITION

We searched the last five years' Cochrane Systematic Review (CSRs) using the terms "dyspnea" and its synonyms in the Cochrane Library. We extracted and summarized all the available evidence using a map. We grouped the included CSRs for health conditions and interventions, indicating the effect and the quality of evidence.

EVIDENCE SYNTHESIS

We found 371 CSRs published between 2016 and 2021 and included 15 in this overview. We found eight studies on chronic obstructive pulmonary disease, two on cancer, and one for bronchiectasis, chronic respiratory disease, cystic fibrosis, idiopathic pulmonary fibrosis and interstitial lung disease. Effective interventions included pulmonary rehabilitation, also in combination with exercise training, non-invasive ventilation, upper limb training and multicomponent integrated interventions, with very low- to moderate-quality evidence.

CONCLUSIONS

These results are the first step of indirect evidence to generate helpful hypotheses for clinical practice and future research on dyspnea in adults with PCC. They served as the basis for one recommendation on treatments for dyspnea as a PCC symptom published in the current WHO Guidelines for clinical practice.

The role of personality traits in inpatient pulmonary rehabilitation response in patients with chronic obstructive pulmonary disease

BACKGROUND

The effectiveness of pulmonary rehabilitation (PR) is a critical issue for chronic obstructive pulmonary disease (COPD) patients. However, PR response is marked by a strong heterogeneity, partially unexplained to date. We hypothesized that personality traits defined by the Five-Factor Model could modulate the effect of inpatient-PR.

OBJECTIVE

The aim was to assess the associations between these five personality traits and PR outcomes.

METHODS

74 persons with COPD admitted for a 5-week inpatient PR program had a personality assessment at the start of the program (T1). Exercise capacity, quality of life, sensory and affective dyspnea dimensions were assessed at T1 and at the end of the program (T2). Their evolution was evaluated using the delta score between T2 and T1. PR response was defined using the minimal clinically important change score for each of them. A composite response was established distinguishing the poor responders' group, made of patients who responded to 0, 1 or 2 parameters and the good responders' group, with patients who responded on 3 or 4 indicators.

RESULTS

Logistic regressions analyses highlighted that those with a high level of openness [OR = 0.36, 95% CI = 0.15-0.74, p < 0.01] were less likely to respond on quality of life, controlling for socio-demographic factors and the severity of the disease.

CONCLUSION

This study shows that the investigation of the personality constitutes an interesting perspective for better understanding the interindividual differences observed between patients in the PR response. Tailoring clinical intervention to the patient's personality could be a promising prospect for optimizing PR effectiveness.

Diaphragmatic excursion is correlated with the improvement in exercise tolerance after pulmonary rehabilitation in patients with chronic obstructive pulmonary disease

BACKGROUND

In patients with chronic obstructive pulmonary disease (COPD), the maximum level of diaphragm excursion (DEmax) is correlated with dynamic lung hyperinflation and exercise tolerance. This study aimed to elucidate the utility of DEmax to predict the improvement in exercise tolerance after pulmonary rehabilitation (PR) in patients with COPD.

METHODS

This was a prospective cohort study. Of the 62 patients with stable COPD who participated in the outpatient PR programme from April 2018 to February 2021, 50 completed the programme. Six-minute walk distance (6MWD) was performed to evaluate exercise tolerance, and ultrasonography was performed to measure DEmax. Responders to PR in exercise capacity were defined as patients who demonstrated an increase of > 30 m in 6MWD. The receiver operating characteristic (ROC) curve was used to determine the cut-off point of DEmax to predict responses to PR.

RESULTS

Baseline levels of forced expiratory volume in 1 s, 6MWD, maximum inspiratory pressure, DEmax and quadriceps muscle strength were significantly higher, and peak dyspnoea of modified Borg (mBorg) scale score was lower in responders (n = 30) than in non-responders (n = 20) to PR (p < 0.01). In multivariate analysis, DEmax was significantly correlated with an increase of > 30 m in 6MWD. The area under the ROC curve of DEmax to predict responders was 0.915, with a sensitivity and specificity of 83% and 95%, respectively, at a cut-off value of 44.9 mm of DEmax.

CONCLUSION

DEmax could adequately predict the improvement in exercise tolerance after PR in patients with COPD.

Physiological Changes Differ between Responders and Nonresponders to Pulmonary Rehabilitation in COPD

PURPOSE

Not all patients with chronic obstructive pulmonary disease (COPD) experience similar benefits after pulmonary rehabilitation (PR). This pre-post PR study used a large sample of patients with COPD to determine whether PR-induced changes of oxygen uptake (V˙O2) kinetics and exercise responses of V˙O2, carbon dioxide output (V˙CO2), minute ventilation (V˙E), V˙E/V˙CO2, breathing frequency, and tidal volume differed between responders and nonresponders to PR.

METHODS

Responders to PR were defined as patients with a minimal clinically important increase in endurance time of 105 s. Isotime (=180 s) values of V˙O2, V˙CO2, V˙E, V˙E/V˙CO2, breathing frequency, and tidal volume; gains of V˙O2, V˙CO2, and V˙E; and V˙O2 mean response time of 183 patients with COPD (forced expiratory volume in 1 s: 56% ± 19% predicted) were compared between pre- and post-PR constant work rate tests.

RESULTS

After PR, only the group of responders significantly decreased V˙O2 mean response time (P < 0.05), V˙CO2 gain, V˙E gain, and isotime values of V˙CO2, V˙E, and V˙E/V˙CO2 (all, P < 0.001), while also improving their breathing pattern (e.g., decreased breathing frequency isotime value; P < 0.0001). These changes were not observed in the group of nonresponders. Changes in physiological exercise responses were correlated with changes in physical performance (e.g., correlation between changes in V˙O2 mean response time and endurance time: P = 0.0002, r = -0.32).

CONCLUSIONS

PR-induced changes in physiological exercise responses differed between responders and nonresponders. Physiological changes are relevant to explain the variable improvements of physical performance after PR in patients with COPD.

Effects of low and high resistance training intensities on clinical outcomes in patients with COPD - a randomized trial

AIM

To compare the effects of two different intensities of combined resistance and aerobic training on physical-functional aspects and perceptual aspects of health status in patients with Chronic Obstructive Pulmonary Disease (COPD).

DESIGN

This was a randomized parallel group trial.

METHODS

Thirty-one patients were assessed regarding: symptoms (COPD Assessment Test - CAT), quality of life (Saint George's Respiratory Questionnaire - SGRQ); exercise capacity (six-minute walk test and constant-workload resistance test - CWRT); and muscle strength (one-repetition maximum test and isometric muscle strength for knee extensors - Kext and elbow flexors - EFlex). Patients were randomized in two groups to perform a combined training: 1) LL/HR = Low-load/high-repetition resistance training (n = 16; 68 ± 9.3 years; FEV₁ = 50.0 ± 15.7%pred); and 2) HL/LR = High-load/low-repetition resistance training (n = 15; 70 ± 6.5 years; FEV₁ = 46.8 ± 14.5%pred), and underwent 36 sessions.

RESULTS

Symptoms, quality of life and exercise capacity presented significant improvement (p < .05) in both groups. Both intensities of resistance training improved symptoms (∆CAT: LL/HR = -3.9; HL/LR = -2.8) and exercise capacity (∆ tolerance time in CWRT: LL/HR = +450.9s; HL/LR = +583.4s) above minimal clinically important difference value. Nevertheless, improvement in quality of life (∆SGRQ: LL/HR = -3.8; HL/LR = -10) and in isometric muscle strength (∆KExt: LL/HR = +15.8 N; HL/LR = +37.7 N and (∆EFlex: LL/HR = +9.5 N; HL/LR = +29.9 N) was observed only in the HL/LR group, which also presented a larger number of responders considering isometric muscle strength.

CONCLUSION

High-intensity resistance training in a combined training was more effective in ameliorating several aspects of patients with COPD, responding more and better to physical-functional aspects and perceptual aspects of health status.