Does the Type of Cannula Matter? A Case Report and Review of the Evidence Regarding Steel and Plastic Cannulae With Respect to a Continuous Subcutaneous Insulin Infusion

A new paradigm in the management of diabetes mellitus evolved following the introduction of continuous subcutaneous insulin infusions (CSII) into clinical practice. Outcomes include greater patient satisfaction alongside improved glycemic control. Drawbacks, however, which cannot be omitted, include patient, technology, and both patient and provider error. We present a mismatch between a patient's total daily dosage of insulin between what was expected and what was being delivered from a pump; ultimately, this required changing the infusion site and switching the type of catheter used, with resolution and improvement in clinical and glycemic status. This case is written to provide insight into one of the many complications that may be encountered with continued same-site usage of an insulin pump; moreover, strategies for management, alongside a review of the literature, are provided.