Figures
Tables
- Table 1 Drugs or toxins that can cause methaemoglobinaemia
Aniline dyes Antimalarials Benzene derivates Dapsone, rasburicase and phenazopyridine Inadequately cooked vegetables contaminated with bacteria Local anaesthetics (benzocaine, prilocaine, lidocaine) Nitric and nitrous oxides Nitrites Nitroglycerine Nitroprusside Paraquat Phenacetin Phenytoin Silver nitrate Smoke inhalation Sodium valproate Sulfasalazine Sulfonamides Zopiclone - Table 2 Methaemoglobin level and signs and symptoms
Methaemoglobin Signs and symptoms 0–3% Normal levels, no symptoms up to 10% 10–20% Mild symptoms, cyanosis, chocolate-brown coloured blood 20–50% Dyspnoea, exercise intolerance, fatigue, headache, dizziness, confusion, tachicardia, syncope >50% Central nervous system depression, seizures, coma, diysrhytmias, myocardial ischemia, tachypnea, metabolic acidosis, death
Vol 9 Issue 3
Table of Contents
Misunderstanding the arterial blood oxygen saturation
