Culture-negative sepsis after pediatric cardiac surgery: Incidence and outcomes

Significant proportion of congenital heart surgery (CHS) children exhibit sepsis, but have negative blood culture and defined "culture negative sepsis (CNS)."

Retrospective analysis of CNS patients undergoing CHS.

437 consecutive CHS children grouped as controls (antibiotic prophylaxis), CNS, and culture positive sepsis (CPS).

Incidences of CNS and CPS were 16% and 7%. Median mechanical ventilation (MV) in hours among CPS, CNS, and control was 116 (45-271), 63 (23-112), and 18 (6-28) (P < 0.001), respectively. Multivariable linear regression identified CPS (median ratio: 3.1 [2.3-4.1], P < 0.001), CNS (median ratio: 5.6 [3.7-8.4], P < 0.001), and weight (kg) (median ratio: 0.98 [0.96-0.99], P = 0.009) as associations of MV. Intensive care unit (ICU) stay (hours) was 192 (120-288) in CNS, 288 (156-444) in CPS, and 72 (48-120) in controls (P < 0.0001). Multivariable linear regression showed CNS (median ratio: 2.4 [2.0-2.9], P< 0.001) CPS (median ratio: 3.3 [2.5-4.4], P < 0.001), and weight (median ratio: 0.98 [0.97-0.99], P ≤ 0.001) prolonging ICU stay. Mortality was 10.7%, 2.9% and 1.2% in CPS, CNS, and control (P = 0.03). Multivariable regression identified CPS an independent predictor of mortality with odds ratio 8.6 (1.7-44.9; P = 0.010). 11.26% patients in CNS and 79.3% in CPS received antibiotics for more than 10 days.

Incidence of CNS was 16%; duration of MV and ICU stay and mortality was significantly less in CNS than CPS patients.