Fluid Flow Through Intravenous Cannulae in a Clinical Model

McPherson, Duncan; Adekanye, O.; Wilkes, A. R.; Hall, Judith Elizabeth

doi:10.1213/ane.0b013e3181966451

Cited by 27 publications

(35 citation statements)

References 6 publications

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“…The piston pump assembly described by O'Callaghan and Singh [1] is indeed exactly the same as ours [2]. We were unaware of their earlier description of this technique and have not accredited them with its prior publication.…”

Section: A Replymentioning

confidence: 86%

“…To clarify, we would like to point out that first, our observations about the nature of flow through the cannula are based on Experiment 3 in our paper [2] (Fig. 5), and second, each of the four individual lines within each group in Fig.…”

Section: A Replymentioning

confidence: 98%

“…However, there is nothing new under the sun. O'Callaghan and Singh described an near-identical creation in Anaesthesia in 2009 [2], also involving the combination of one-way valves and a three-way tap to speed the administration of fluids compared with a three-way tap alone. Dr Smart and his colleagues have taken their experiment in a different direction by comparing their device to a pressure infuser, rather than to the more conventional rotating three-way tap system as O'Callaghan and Singh did.…”

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confidence: 99%

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Is flow really laminar in a piston pump infusion?

McPherson

2014

Anaesthesia

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Section: A Replymentioning

confidence: 86%

Section: A Replymentioning

confidence: 98%

mentioning

confidence: 99%

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Is flow really laminar in a piston pump infusion?

McPherson

2014

Anaesthesia

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“…Schreiber et al compared the manufacturerʼs quoted flow rate using normal saline . McPherson et al built a vein model and inserted cannulas between 14 and 20G . Other authors used several PVA devices with different characteristics and they determined flow rate using 0.9% saline, most of them falling by gravity.…”

Section: Discussionmentioning

confidence: 99%

Peripheral venous access devices for apheresis: 16‐gauge is not always needed

et al. 2020

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BACKGROUND Peripheral venous access (PVA) devices for apheresis should be selected to provide enough flow with the least vein damage, but little information is available about PVA devices blood flow rates. The aim of this study was to know the blood flow rates provided by the most frequent PVA devices used in apheresis procedures. STUDY DESIGN AND METHODS An experimental study was designed to simulate a plasma exchange procedure using citrated whole blood (WB). Two steel needles (16‐ and 17‐gauge [G]) and six plastic cannulas (16G, 17G, two 18G, 20G, and 22G) were analyzed. The hematocrit of the WB was adjusted to 45%, 40%, 35%, 30%, and 25%. The separated plasma from the WB was used as replacement fluid. RESULTS Blood flow rate (inlet/return, mL/min) for 16G and 17G devices with a hematocrit of 45% was 142/142 (maximum admitted by separator); one of the 18G cannulas reached 142/142 and the other one reached 117/140; the 20G cannula reached 78/94; and the 22G reached 45/55. A hematocrit reduction from 45% to 25% increased the flow rate (when possible) over 22% (range: 14%‐30%). CONCLUSIONS PVA devices with a size of 16‐18G provided the maximum flow admitted by the apheresis system. The 20G provided flow rates for a significant number of procedures, and 22G could be used in some procedures. The hematocrit should be taken into account when selecting the PVA device since, at hematocrit of 25%, the flow can be from 14% to 30% higher than flow rates reached with blood at hematocrit of 45%.

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“…This is a frequently occurring limit found in data processing systems, colloquially referred to as the '64k' limit, which restricts, for example, the row count of older versions of Microsoft Excel spreadsheets (before v.2007) [3], thereby affecting data storage and transfer involving older databases.…”

Section: Big Data and Big Numbersmentioning

confidence: 99%

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Smart

2014

Anaesthesia

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Fluid Flow Through Intravenous Cannulae in a Clinical Model

Cited by 27 publications

References 6 publications

Is flow really laminar in a piston pump infusion?

Is flow really laminar in a piston pump infusion?

Peripheral venous access devices for apheresis: 16‐gauge is not always needed

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