Conservative Management in Primary Spontaneous Pneumothorax: a Multicenter Randomized Non-inferiority Study

Starting soon · Not applicable

Conditions studied: Primary Spontaneous Pneumothorax (PSP), Conservative Management (Active Observation)

In brief

The goal of this randomized clinical trial is to find out whether a conservative management strategy (active observation without an initial invasive procedure) can treat as effectively as the standard treatment with chest tube drainage in adults with a large primary spontaneous pneumothorax who are clinically stable. Participants include men and women 18 to 60 years old with a lung collapse ≥30% (by Collins method). The main questions are: * Is conservative management not inferior to chest tube drainage for achieving complete lung re-expansion at 8 weeks (on chest X-ray)? * What are the differences between the two strategies in complications, recurrence at 2 years, quality of life, length of hospital stay, number of additional procedures, and healthcare costs? Comparison groups: * Conservative management: in-hospital observation with a control chest X-ray no earlier than 4 hours; if the person remains stable, discharge home with scheduled outpatient follow-up and serial X-rays until resolution. * Standard treatment (chest tube): chest tube placement and hospital admission; discharge based on clinical progress with routine outpatient follow-up. Researchers will compare both groups to see whether conservative management works just as well to resolve the pneumothorax at 8 weeks and whether it leads to fewer complications, shorter hospital stays, better quality of life, and lower costs. What will participants be asked to do? Review the participant information sheet and sign informed consent. Be randomized by computer (REDCap) to either conservative management or chest tube drainage. Depending on the assigned group: * Conservative group: remain under observation initially, have a chest X-ray at ≥4 hours; if still stable, go home with clinic visits (about 1 week after discharge and then every \~2 weeks) until the pneumothorax has resolved. * Chest tube group: undergo chest tube insertion, stay in the hospital, and attend routine outpatient follow-up after discharge. Undergo chest X-rays interpreted by the clinical team (with centralized review procedures). Complete brief symptom assessments, quality-of-life questionnaires (e.g., EQ-5D-5L), and attend follow-up visits or phone calls for up to 2 years to check for recurrences. This is a multicenter study conducted in several hospitals in Spain. The planned sample size is 436 participants (218 per group), with a non-inferiority margin of 5% and the primary assessment at 8 weeks.

Key facts

Study ID: NCT07331805
Run by: Corporacion Parc Tauli
People needed: 436
Starts: 2026-01-01
Expected to finish: 2028-11-01
Last updated by the study team: 2026-01-12

Who can join

Age: 18 and older, up to 60. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Age: >18 and ≤60 years at the time of enrollment.
Diagnosis: Primary spontaneous pneumothorax of large size (lung collapse ≥30% by the Collins method on chest X-ray).
Episode type: Any episode of primary spontaneous pneumothorax.
Clinical stability suitable for observation without immediate intervention: Systolic BP >90 mmHg, heart rate <140 bpm, oxygen saturation >90% (with supplemental oxygen if needed), respiratory rate 15-30 breaths/min.
Consent: Has read and understood the participant information sheet and signed informed consent.

You may not qualify if…

Pre-existing lung disease that may predispose to pneumothorax (e.g., COPD, cystic fibrosis, interstitial lung disease, tuberculosis, pulmonary neoplasm).
Indication for urgent thoracic surgery (e.g., imaging highly suggestive of giant bullae/blebs requiring immediate surgical intervention).
Pregnancy or breastfeeding.

Full record on ClinicalTrials.gov

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