The effects of syringe plunger design on drug delivery during vertical displacement of syringe pumps
✍ Scribed by M. Weiss; J. Fischer; T. Neff; O. Baenziger
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 148 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0003-2409
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✦ Synopsis
Fluid delivery from four types of commercially available 50-ml syringes was measured using an electronic balance at an infusion rate of 1 ml.h(-1). Retrograde aspiration volume and zero-drug delivery time were recorded after lowering the syringe pump by 50 cm. Syringe compliance was calculated from the volume of bolus released after occlusion at 100 mmHg. Zero-drug delivery times differed significantly between syringes, ranging from [mean (SD)] 3.26 (0.40) min to 6.38 (0.56) min (F = 55.5, d.f. = 3/20, p < 0.0001). Syringe compliance correlated well with aspiration volume (Pearson r(2) = 0.92, p < 0.001) and zero-drug delivery time (r(2) = 0.90, p < 0.001). Syringe design affected the internal syringe compliance. All syringes were associated with potentially relevant zero-drug delivery times after moderate vertical displacement. To minimise this risk, vertical displacement of syringe pumps delivering highly vasoactive drugs should be avoided.