| Impact of syringe size on the performance of infusion pumps at low flow rates. | |
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MedLine Citation:
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PMID: 19935442 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To evaluate the impact of syringe size on start-up delay and the time to reach 50% and 90% of target flow rates, using two commercially available syringe infusion pumps at infusion rates of < or =1 mL/hr. DESIGN: Two syringes (Terumo) of different size (10-mL and 50-mL), using two syringe infusion pumps (Pump A, Terumo Terufusion Infusion Pump TE-331; and Pump B, Braun Perfusor Compact S) were studied. Effective fluid delivery was measured at 0.4 mL/hr, 0.8 mL/hr, and 1.0 mL/hr for the initial 60 mins, using the gravimetric method. Instant flow was calculated as volume difference for every 1-min interval per minute. Start-up delay was defined as time in minutes of 0 flow from the start of infusion. Syringe placement, bubble removal, infusion line priming, and positioning were standardized for all measurements, using new syringes and infusion lines. Each experiment was repeated six times. Statistical analysis was performed, using a nonparametric test (Mann-Whitney U test). SETTING: None. PATIENTS: None. INTERVENTIONS: None. RESULTS: Using the 50-mL syringe, the start-up delay was consistently higher and the time to reach 50% and 90% of target flow were significantly longer, independent of which syringe infusion pump was used. At every flow rate studied, the pumps did not reach the target flow rate before 60 mins with the 50-mL syringe. With the 10-mL syringe, target flow rate was achieved before 20 mins for both pumps. CONCLUSIONS: Our findings demonstrate a clinically relevant impact of syringe size on syringe infusion pump performance at low flow rates. The time to reach 50% and 90% of target flow are significantly longer, using the 50-mL syringe compared with the 10-mL syringe, and the time to reach 50% of target flow is independent of the longer start-up delay. Based on our findings, we speculate that smaller syringe sizes and higher infusion rates are preferable for continuous drug infusions, particularly when prompt establishment of the drug effect is critical. |
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Authors:
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Nadia Schmidt; Claudia Saez; Istvan Seri; Andr?s Maturana |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies Volume: 11 ISSN: 1529-7535 ISO Abbreviation: Pediatr Crit Care Med Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-11 Completed Date: 2010-06-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954653 Medline TA: Pediatr Crit Care Med Country: United States |
Other Details:
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Languages: eng Pagination: 282-6 Citation Subset: IM |
Affiliation:
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Universidad de Chile, Santiago de Chile, Chile. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Equipment Design Humans Infusion Pumps / standards* Infusions, Intravenous / instrumentation Syringes* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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