Insulin pens have allowed flexibility in the lifestyle of patients with diabetes,1 and their use has become widespread.2 Pen use does not necessarily imply improvement in metabolic control, which may even deteriorate,1,3 and technical problems can occur.2,4,5 We describe 3 pregnant women with diabetes in whom metabolic control deteriorated owing to pen malfunction.
Albareda M, Balmes L, Wagner A, Corcoy R. Insulin Pens and Acute Deterioration in Blood Glucose Control. Arch Intern Med. 1999;159(1):100. doi:
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