Vuillard C, et al. - Researchers evaluated needle aspiration (NA) success and the influence of a longer symptom onset to NA time in primary spontaneous pneumothorax (PSP). In the intensive care unit of Louis Mourier Hospital (January 2000 to December 2011), they retrospectively carried out a discovery phase. This was followed by a prospective validation cohort (January 2012 to August 2015). The discovery phase had 130 patients and the prospective cohort had 87 patients admitted for PSP, respectively. In both populations, 98 patients (75%) and 71 (82%) had NA as first-line treatment, respectively. In the discovery phase, 34.7% was the immediate success rate of NA. When NA was performed ≥48 hours after symptom onset, the immediate success rate was higher. In the prospective cohort, an immediate success rate of 40.8% was achieved, with more success associated with NA performed following 48 hours of symptoms’ onset. A higher success of NA was reported in relation to a delay between the first symptom and NA procedure ≥48 hours. Overall, findings revealed a link between longer symptom onset to NA time and NA success.