Lung Diseases, Obstructive Clinical Trial
Official title:
Evaluation of Respiratory Function in Patients With Post-tuberculosis Lung Impairment After Pulmonary Tuberculosis Treatment or After Spontaneous Healing
Pulmonary tuberculosis (TB) is an important risk factor for chronic respiratory disease due to residual lung damage. A recent review of the literature on TB sequelae and rehabilitation has provided clear evidence that TB is definitively responsible for lung function impairment. Functional evaluation of TB patients after completion of pulmonary tuberculosis treatment or spontaneous healing should be considered as part of clinical care. Unfortunately, few studies are available in the literature investigating the physiopathology of lung damage, its impact on quality of life, the potential need for pulmonary rehabilitation (PR), and the effects of a PR program.Objectives of this prospective multicentre international study are: Primary Objective-to assess the exercise capacity 6-min walking test in patients with post-TB lung impairment after completion of pulmonary tuberculosis treatment or after spontaneous healing. Secondary Objectives-to assess the effects of the PR program on dyspnoea symptoms and muscle fatigue, quality of life.
Methods Respiratory functional parameters at baseline and at the end of the 15 sessions
rehabilitation programme (RP) will be collected at the participating Centre. Follow-up visit
1 year after completion of RP Baseline assessment
1. After signature of the informed consent to the study, patients will undergo a
Pre-screening Visit: data on medical history, current pharmacological therapies, smoking
(pack/year), vaccinations, physical examination, vital parameters (blood pressure, heart
rate, respiratory rate, oxygen saturation in arterial blood), co-morbidities and Mini
Mental State Examination will be collected.
2. Screening Visit (before the RP), during the visit the following data will be collected:
number of TB disease episodes, detailed data on the last TB episode (age at onset of TB
symptoms, age at TB diagnosis, anti-TB treatment duration, anti-TB drugs administered,
socio-economic conditions, education level, physical examination, vital parameters,
oxygen saturation in arterial blood, heart rate and respiratory rate). Pulmonary
rehabilitation program tailored according to specific patient's needs.
3. Baseline assessment of respiratory function: arterial blood gas (ABG) analysis,
spirometry, diffusing capacity of the lungs for carbon monoxide (DLCO), overnight
oximetry, electrocardiogram (ECG), chest X-ray (CXR), High-resolution computed
tomography (HRCT)
4. Assessment of the rehabilitation programme: functional evaluation (6MWT), muscle
strength evaluation (five-repetition sit-to-stand test (5STS)), respiratory muscle
strength (maximum inspiratory pressure (MIP) and maximum expiratory pressure (MEP)),
symptoms evaluation (Dyspnea: Medical Research Council Questionnaire (MRC), Modified
Borg pre/post 6MWT, Baseline and Transition Dyspnea Indexes (BDI-TDI) and Fatigue:
Modified Borg pre/post 6MWT)
5. Assessment of the Quality of Life (QoL): CAT and St George's Respiratory Questionnaire.
Final assessment:
A final assessment will be done at the end of the rehabilitation programme and will include:
c) Only ABG, spirometry and DLCO d) and e).
Pulmonary rehabilitation programme
PR programme will include:
At least 15 aerobic-training sessions by cycle ergometer supervised by a respiratory
therapist (5 session per week, 30 minutes each: 5 minutes warm up, 20 minutes training and 5
minutes warm-down) at constant load (calculated with Hill equation, Hill K, et al. Estimating
maximum work rate during incremental cycle ergometry testing from six-minute walk distance in
patients with chronic obstructive pulmonary disease. Arch Phys Med Rehabil.
2008;89(9):1782-7.) with an adherence of at least 80%.
1. At least 15 strength-training sessions for peripheral muscles (30 minutes calisthenics
exercise) with an adherence of at least 80%.
2. At least 3 face to face and/or group educational sessions, for:
- Optimization of inhalation techniques
- Exercise training and maintenance programs
- Daily physical activity
- Airways clearance techniques
- Long oxygen therapy home management.
3. According to individual needs, the PR program should include:
- airways clearance techniques
- inspiratory muscles training (with Threshold®)
Monitoring Anonymous data will be collected in a common electronic format (excel database).
Adverse events (AEs) and severe adverse events (SAEs) will be reported and registered.
Follow-up
Follow-up visit 1 year after completion of RP will include:
c) Only ABG, spirometry, DLCO and overnight oximetry d) and e) Statistical analysis A
two-tailed p-value less than 0.05 will be considered statistically significant.
Qualitative and quantitative variables will be described with absolute and relative
(percentages) frequencies and means (standard deviations -SD) or medians (interquartile
ranges -IQR) depending on their normality, respectively. The mean difference between the two
study groups in the 6MWT will be evaluated using the Student's t-test. Differences in the
variables associated to the secondary objectives will be evaluated using the Chi-square or
Student's t-test for qualitative and quantitative variables. A two-tailed p-value less than
0.05 will be considered statistically significant.
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