胸腔内出血、血気胸、気胸における小口径対大口径チェストチューブの比較：外挿妥当性、エンドポイントの異質性、および試験的逐次解析の仮定：著者

Granieri and colleagues compared small-caliber chest drains (14 Ch or smaller) with large-bore chest tubes (28 Ch or larger) for traumatic hemothorax, hemopneumothorax, and pneumothorax and combined conventional meta-analysis with trial sequential analysis.

While the pooled effect estimate suggested no clear difference in treatment failure, clinical translation requires caution. First, the randomized trials largely represent selected, stable thoracic trauma rather than high-risk phenotypes (for example, massive hemothorax, ventilated patients, or severe polytrauma). Second, the primary endpoint ("failure") groups reinterventions that vary in clinical impact and are sensitive to local imaging and escalation thresholds (for example, second drain versus video-assisted surgery). Third, trial sequential analysis conclusions depend strongly on prespecified assumptions (baseline event rate and the smallest clinically important effect), which should be explicitly justified and, where possible, explored in sensitivity analyses.

These clarifications may reduce overgeneralization, better align conclusions with the included trial populations, and inform pragmatic multicenter trial design with standardized protocols and patient-centered outcomes.