Malakasioti G, et al. - Researchers investigated if near-infrared spectroscopy (NIRS) tissue oxygenation indices serve as a reliable tool to assess blood flow in established paediatric kidney transplants. This study included paediatric kidney transplant recipients ages 1–18 years with stable allograft function and routine Doppler ultrasound (DUS) assessment of kidney transplant perfusion, including resistive index (RI) and peak systolic velocity at the upper and lower poles. NIRS data [tissue oxygenation index (TOI%)] were recorded for a minimum of 2 min with NIRS sensors placed on the skin over upper and lower allograft poles. Findings demonstrated a good correlation of NIRS indices with DUS perfusion and haemodynamic parameters in established paediatric kidney transplant recipients.