TY - JOUR T1 - Methaemoglobinemia after Liposuction under Tumescent Local Anaesthesia – Diagnostic Value of Pulse Oximetry TT - JF - World-J-Plast-Surg JO - World-J-Plast-Surg VL - 11 IS - 1 UR - http://wjps.ir/article-1-866-en.html Y1 - 2022 SP - 111 EP - 116 KW - Tumescent anaesthesia KW - Methaemoglobinemia KW - Pulse oximetry KW - Liposuction N2 - Background: Tumescent local anaesthesia with prilocain can lead to clinically significant methemoglobin levels. New generation multiple wavelength pulse oximeters (e. g. Masimo Radical 7®) can measure methemoglobin levels. Methods: In this prospective observational study we compared the venous methemoglobin levels and the corresponding pulse oximetric values of the Radical 7® in patients undergoing tumescent local anaesthesia for liposuction procedures. The measurements were performed in Hanseklinik, Luebeck, Germany between 2008 and 2011. Results: In 133 patients, we measured a maximum methemoglobin level of 18 per cent. In a Bland-Altman analysis we found a mean bias of +2.2 % (-4.1 to 8.4 limits of agreement) for pulse oximetric values compared to hemoximetry. Conclusion: Pulse oximetric measurement of methemoglobin is an early-warning tool for the detection of clinically significant methaemoglobinemia in patients with tumescent local anaesthesia. M3 10.52547/wjps.11.1.111 ER -