Pneumothorax Clinical Trial
Official title:
A Prospective, Randomised Trial in Pneumothorax Therapy: Manual Aspiration Versus Conventional Chest Tube Drainage
The purpose of this study is to evaluate the efficacy of manual aspiration in comparison to
conventional chest tube drainage in pneumothorax therapy:
1. whether manual aspiration will shorten hospital admission.
2. whether the lung will expand by means of clinical and radiological findings.
No consensus has been defined concerning the exact treatment of a first episode of SP.
Literature suggests similar immediate and long-term efficacy of manual aspiration and chest
tube drainage. Morbidity of manual aspiration is low and the procedure is well tolerated.
Manual aspiration is safe with a complication rate of only 1 % and can be performed in the
outpatient clinic in the majority of patients reducing costs. Our aim is to re - evaluate
these findings with a mono-centre study with 114 patients, set-up for the first time in the
Netherlands with an expectancy to confirm the former findings.
Aim of the study:
To evaluate the efficacy of manual aspiration in comparison to conventional chest tube
drainage in pneumothorax therapy:
1. whether manual aspiration will shorten hospital admission.
2. whether the lung will expand by means of clinical and radiological findings.
Study design: prospective single-centre, open randomised trial.
Randomisation:
With a computer minimization program for manual aspiration or usual care with special
attendance to the cause of pneumothorax (spontaneous or traumatic), the presence of smoking
and gender.
Statistical analysis:
Our primary aim is to demonstrate a higher efficacy for manual aspiration in terms of a
shorter admission duration (LOS) in favor of manual aspiration with similar therapy success
rates. We will analyse data on an intention to treat basis. P-values below 5 % will be
considered statistically significant. Normal distribution will be checked. Means (standard
deviations) or medians (ranges or interquartile ranges) will be calculated and unpaired
t-tests or Mann Whitney U tests will be used as appropriate to test differences in LOS.
Categorical data (success rates) will be analysed using Chi2-tests. Data analysis will be
performed using SPSS version 12.
Study population:
Patients with the first episode of a symptomatic pneumothorax or an asymptomatic
pneumothorax with a size ≥ 20 % as estimated by Light's formula ( (1-L/H )x100 ) with an age
of ≥ 18 and < 85 years.
Intervention: Manual aspiration or conventional chest tube drainage. Primary study endpoint
1. The LOS.
Secondary endpoint:
1.The success rate of each technique:
Conventional chest tube drainage; complete expansion of the lung, counteraction of the air
leak and removal of the drain within 72 hours.
Manual aspiration: complete expansion and discharge within 24 hours, success rate at two
weeks (continuous expansion) and one year (no recurrence of pneumothorax in the interval
period after discharge between 2 weeks and 1 year).
Burden, risks and advantages associated with participation:
The risks of manual aspiration and chest tube drainage techniques are the same.
Complications seem to be occur in only 1 % of the aspirations and they consist of
haematothorax, retained catheter tips, subcutaneous emphysema and vasovagal reactions. The
most important disadvantage is in case of an unsuccessful treatment by manual aspiration
with a persisting pneumothorax. Patients in this case have to undergo the conventional tube
chest drainage after all. The benefit of the investigational approach is that patients are
discharged earlier from the hospital in case of success and its cost effectiveness.
;
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
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