Neuroanaesthesia & neurocritical care
Near-infrared spectroscopy (NIRS) monitoring during steep trendelenburg in robotic prostatectomy
Authors' conclusion
This study demonstrates distinct phase-dependent cerebral oxygenation patterns during RALP.
Study context
- Population
- Adults (ASA I–III) undergoing robotic-assisted laparoscopic prostatectomy (RALP) in steep Trendelenburg (30 degrees), Nuovo Ospedale di Prato, Italy, November 2024–May 2025
- Participants
- 40 adults
- Outcome
- Phase-dependent changes in cerebral oxygenation (rSO₂, ΔO₂Hb, ΔHHb; NIRS) and ONSD, and their temporal correlation
- Follow-up
- T0 baseline, T1 45 min and T2 120 min after Trendelenburg, T3 vesicourethral anastomosis, T4 before extubation in neutral position
Methodological detailssingle-centre
- Single-centre
Main finding
As reported in the abstract
- Right optic nerve sheath diameter (ONSD), T0 (mean ± SD)
- 3.79 ± 0.36 mm
- Right ONSD, T3 (mean ± SD)
- 4.59 ± 0.47 mm
- Left ONSD, T0 (mean ± SD)
- 3.80 ± 0.42 mm
- Left ONSD, T3 (mean ± SD)
- 4.73 ± 0.47 mm
- Correlation ΔHHb–ONSD, right (Pearson r; p < 10⁻¹⁶)
- 0.63
- Correlation ΔHHb–ONSD, left (Pearson r; p < 10⁻¹⁶)
- 0.63
Observational data: associations, not effects.
Original publication
NIRS monitoring during steep trendelenburg in robotic prostatectomy. J Clin Monit Comput. Published 26 May 2026. doi:10.
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