Abstract:
OBJECTIVE:Reduced injection force is among the modifications to the Next Generation FlexPen (NGFP). This force was compared with two other prefilled pens: SoloStar (SS) and KwikPen (KP). RESEARCH DESIGN/METHODS:The injection force of the pens was measured, with either a BD Micro-Fine 31G thin-wall needle, or a NovoFine 32G Tip extra thin wall needle attached. Pens of each type were tested with both needles, during injection of 20 U insulin, at speeds 3.3, 5 and 8.3 mm/s. RESULTS:NGFP had a significantly (p < 0.05) lower mean injection force than SS or KP, at all injection speeds, with both needles. Injection forces (mean +/- s.d.) with NGFP and the BD Micro-Fine() 31G thin-wall needle were: 8.1 +/- 0.7, 10.7 +/- 1.4 and 15.6 +/- 0.9 N at the three speeds, respectively. For SS, the corresponding values were: 9.2 +/- 0.5, 13.3 +/- 0.8 and 20.7 +/- 2.4 N. For KP they were: 12.5 +/- 1.6, 16.9 +/- 1.2 and 24.5 +/- 2.6 N. Attached to the NovoFine 32G Tip extra thin wall needle, the NGFP injection forces were: 5.7 +/- 0.4, 8.2 +/- 0.7 and 12.7 +/- 0.5 N; with SS were: 6.7 +/- 0.3, 10.4 +/- 2.1 and 16.3 +/- 1.1 N; and with KP were: 9.1 +/- 1.3, 13.1 +/- 0.8 and 21.6 +/- 2.0 N. The injection force with NGFP was 12 - 25% lower compared with SS and 35 - 41% lower compared with KP. CONCLUSIONS:This study shows that NGFP has a significantly lower injection force than SS or KP.
journal_name
Expert Opin Pharmacotherjournal_title
Expert opinion on pharmacotherapyauthors
Asakura T,Seino H,Kageyama M,Yohkoh Ndoi
10.1517/14656560903018929subject
Has Abstractpub_date
2009-06-01 00:00:00pages
1389-93issue
9eissn
1465-6566issn
1744-7666journal_volume
10pub_type
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