A previously well 4-year-old boy presented to the emergency room with progressive cyanosis, pallor and vomiting over the last 5 h. Oxygen saturation on pulse oximetry was 87-89% despite 9 L/min of supplemental oxygen. He was tachypnoeic and had a systolic heart murmur, with no other findings on
Urea herbicides, which act by inhibiting photosynthesis, were introduced in 1952 and are now used as pre- and post-emergence herbicides for general weed control in agricultural and non-agricultural practices. Urea herbicides are generally of low acute toxicity and severe poisoning is only likely
A 49-year-old male chemical industry worker was admitted to intensive care with a 24-hour history of respiratory failure, vomiting, headache, stupor, arterial hypotension, and cyanosed face and limbs. He had acute haemolysis (3.9 g/L plasma haemoglobin concentration) and 30% methaemoglobinaemia.
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