2026-10-13T05:14:20Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34041552 2026-10-01T08:27:46Z category_7 category_12 category_13 category_16 category_734 category_61 category_106 portal_87 item_type_6 month_year_10_2026

Postoperative pneumocephalus in unilateral chronic subdural hematoma and its correlation with recurrence: a retrospective single-center study Adrian Liebert (25155375) Thomas Eibl (25155378) Leonard Ritter (25155381) Karl-Michael Schebesch (9676775) Medicine Cell Biology Genetics Physiology Biological Sciences not elsewhere classified Developmental Biology Science Policy Chronic subdural hematoma subdural air pneumocephalus recurrence hematoma volume <p>Pneumocephalus emerged as a risk factor for recurrence of chronic subdural hematoma (CSDH). However, data on volumetric assessment of subdural air (SA), its risk factors, and correlation with recurrence remain limited.</p> <p>We retrospectively included patients with unilateral CSDH who underwent surgery. Three analyses were performed: (1) comparison of absolute versus relative SA to preoperative hematoma volume (HV) for predicting recurrence; (2) evaluation of the relationship between SA and recurrence using regression and stratification into four SA-volume subgroups; (3) identification of risk factors for pneumocephalus.</p> <p>Recurrence was defined as symptomatic re-accumulation of CSDH requiring re-surgery within the first three months of surgery.</p> <p>142 patients were included. Absolute SA demonstrated a stronger correlation with recurrence, with a cut-off value of 6.95 ml. Each additional 1 ml of SA was associated with a 4.3% increase in the odds of recurrence, and rates ranged from 12.4% in patients (<7 ml) to 45% (>21 ml) (<i>p</i> < 0.001). Patients with ≥7 ml of SA were older (<i>p</i> = 0.04), more frequently had hemispheric hematomas (<i>p</i> = 0.02), and exhibited greater mass effect, reflected by width, HV, and midline shift (all <i>p</i> < 0.001). Multivariate analysis and ROC-analysis revealed preoperative HV ≥ 105.5 ml as a relevant parameter of increased SA (<i>p</i> < 0.001).</p> <p>Preoperative HV demonstrated strongest relation to elevated postoperative SA. Absolute postoperative SA correlates better with recurrence. Patients with ≤6.95 ml of SA have a lower recurrence risk, whereas higher volumes are associated with progressively increased recurrence.</p> 2026-10-01T08:27:46Z Text Journal contribution 10.6084/m9.figshare.34041552.v1 https://figshare.com/articles/journal_contribution/Postoperative_pneumocephalus_in_unilateral_chronic_subdural_hematoma_and_its_correlation_with_recurrence_a_retrospective_single-center_study/34041552 CC BY 4.0