Abstract
Objective: Methemoglobinemia is a clinical entity characterized by substitution of ferrous iron (Fe+2) in the hemoglobin structure by ferric iron (Fe+3) that lacks oxygen carrying capacity. Acquired methemoglobinemia may occur due to oxidant substances and drugs, of which local anesthetics constitute an important group. In this study the incidence of prilocaine-induced methemoglobinemia was studied.
Material and Methods: This study was performed on children who presented to the urology department for circumcision in 2013. Methemoglobin levels were measured prior to and after prilocaine injection.
Results: The study enrolled 74 children aged 6 months to 12 years. Five patients with a known hematological disorder or those with chronic disorders were excluded. Of the cases, 20.2 % were found to have methemoglobinemia but none had symptoms. Mean preoperative and postoperative incidences of methemoglobin were 0.71% and 1.80%, respectively. Methemoglobin level was reduced as age of the patient increased.
Conclusion: The risk of methemoglobinemia should be considered with local anesthetic agents widely used in clinical practice, particularly in small age groups.
Keywords: Prilocaine, methemoglobinemia, , circumcised children, Prilokain, methemoglobinemi
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