Evaluating Use of the Octreotide Acetate Pen Injector in a Summative Human Factors Validation Study

Objective: Subcutaneous injections of octreotide acetate require chronic administration by health care providers (HCPs). We aimed to validate the safe and effective use of the octreotide acetate pen injector, its labeling, and instructions for use (IFU) by patients, caregivers, and HCPs and to mitigate use-related risks.

Methods: This summative human factors validation study enrolled adults with neuroendocrine tumors and related diarrhea or flushing, adult caregivers, and HCPs. Before simulated use, participants self-familiarized as desired. Each participant was assigned 1 injection site for administration into an injection pad. The first of 2 unaided injections assessed first use and required priming; the second assessed routine use and dose change. Participants gave subjective feedback after each injection and completed knowledge probes and reading comprehension questions after the second injection.

Results: The study enrolled 45 participants (15 per group). Forty-two participants completed the first injection successfully by administering the dose correctly. Three participants did not dose successfully; 3 failed to prime the pen, and 1 failed to dial the correct dose. Besides dosing, 2 participants failed to remove the needle after injection. Forty-four participants completed the second injection, but 1 participant failed to dial the correct dose. No other errors were observed. Overall success rates on knowledge probes and reading comprehension questions were 99.1% and 99.6%, respectively. All participants found the IFU easy to follow and understand.

Conclusion: The octreotide acetate pen injector, labeling, and IFU enabled intended users to administer subcutaneous octreotide safely and effectively. The residual risks of use are low and acceptable.