In order to reduce pain associated with insulin injection, a tapered tip 32G 6 mm needle has been developed. The aim of this study was to evaluate this tapered needle in comparison with an ordinary straight 31G needle-namely Pen Needle 32G Taper (PN 32G Taper) and Pen Needle 31G 6 mm (PN 31G 6 mm)-in terms of patients' preference, pain perception and usability. Thirty five diabetic patients who used only PN 31G 6 mm (mean age 62.9, male/female: 18/17) were included in this study to answer questionnaires before and after using PN 32G Taper. There were no significant differences between body mass index, HbA1c, daily dosage of insulin injection (IU/day), and maximum dosage of one insulin injection (IU/times) between before and after using PN 32G Taper. With PN 32G Taper, we found statistically significant decrease in frequency of pain (p<0.001), degree of pain (p<0.001), hemorrhage (p<0.001), internal hemorrhage (p<0.05), and dosing force (p<0.001), but significant increase of satisfaction (p<0.001) and recommendation of PN 32G Taper for other patients (p<0.001) compared to PN 31G 6 mm. Using PN 32G Taper for insulin injection will contribute to enhance adherence for diabetes self-management.
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