Spiral Flow Tube for Saline Flush in Coronary CT Angiography:
Initial Experience

Tomizawa, Nobuo; Hayakawa, Yasushi; Inoh, Shinichi; Nojo, Takeshi; Uemura, Satoshi; Nakamura, Sunao

doi:10.17554/j.issn.2313-3406.2016.03.31

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…A phantom study by Kidoh et al [4] resulted that the spiral flow tube would increase the peak enhancement by 20% than the T-shaped tube. In vivo studies showed that the enhancement of abdominal aorta during hepatic arterial phase [4], arteries of lower extremities [5] and coronary arteries [6] increased by 30 to 50 HU using the spiral flow tube. However, the increase in the enhancement was attenuated during portal venous phase [4].…”

Section: Discussionmentioning

confidence: 99%

“…Spiral flow is generated at the chamber-shaped connecting site, hence saline solution would push the contrast medium more effectively than the conventional T-shaped tube [4][5][6]. Previous studies showed that the spiral flow tube significantly increased the arterial enhancement of abdominal aorta [4], aorta of the lower extremities [5] and coronary arteries [6] than the T-shaped tube. However, it is not clear whether the spiral flow tube could maintain the arterial enhancement and diagnostic performance with reduced contrast medium injection.…”

Section: Introductionmentioning

confidence: 99%

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Spiral Flow Fube for Contrast Medium Reduction in Coronary CT Angiography

Tomizawa¹,

Hayakawa²,

Inoh³

et al. 2017

ICFJ

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ObjectivesTo assess the diagnostic performance and enhancement of coronary CT with reduced contrast medium using the spiral flow tube compared with the T-shaped tube.MethodsWe retrospectively included 444 patients who underwent catheter examination within 2 months after coronary CT. The first 222 patients received 21.0 mgI/kg/s of contrast medium using the T-shaped tube and the injected contrast medium was reduced by 6% (19.8 mgI/kg/s) in the last 222 patients using the spiral flow tube. We compared the per vessel diagnostic performance for detecting obstructive stenosis (≥50%) by catheter examination and the enhancement of proximal coronary arteries.ResultsThe sensitivity, specificity, positive predictive value, negative predictive value and accuracy was 96%, 84%, 72%, 98% and 87% using the spiral flow tube and 93%, 83%, 68%, 97% and 86% using the T-shaped tube, respectively, without significance. The enhancement of left main (spiral flow vs T-shape, 407 ± 53 vs 407 ± 62 HU, p = 0.95) and right coronary (419 ± 58 vs 415 ± 61 HU, p = 0.49) arteries did not show significant difference.ConclusionsThe spiral flow tube would maintain the diagnostic performance and coronary enhancement with reduced contrast medium compared with the T-shaped tube.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spiral Flow Fube for Contrast Medium Reduction in Coronary CT Angiography

Tomizawa¹,

Hayakawa²,

Inoh³

et al. 2017

ICFJ

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“…A spiral flow tube (Nemoto spiral flow; Nemoto Kyorindo, Tokyo, Japan) was used as a connecting tube for saline flush. 8…”

Section: Methodsmentioning

confidence: 99%

Double region of interest timing bolus technique following endovascular aortic repair: Short-term prognosis analysis

et al. 2019

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Objectives To compare the incidence rate of reintervention in patients with and without complication findings at aortic computed tomography using double region of interest timing bolus (DRTB) method after endovascular stent placement of the aorta. Methods We included 40 patients who underwent computed tomography of the aorta using DRTB method after endovascular stent placement. DRTB method allows to scan the aorta with a short injection time of 9 s by synchronizing the scan speed to the aortic flow. Complication findings at computed tomography were defined as endoleak, rupture, occlusion, and infection. The primary endpoint was reintervention, which was defined as any of the following three events: conversion to open repair, graft revision, or secondary intervention. Results The mean contrast medium during computed tomography angiography was 38.6 ± 3.9 mL. Complication findings at computed tomography were present in 10 patients (25%): endoleak ( n = 9) and infection ( n = 1). During a median follow-up of 7 months (interquartile range, 4–11 months), two patients experienced reintervention. Kaplan–Meier curves by complication findings showed that event rate at 6 months was significantly higher in patients with complication findings than in patients without (20% vs 0%, p = 0.01). No patients without complication findings at computed tomography experienced reintervention. Conclusions No complication findings at computed tomography after intervention of the aorta resulted in good prognosis in patients who underwent aortic computed tomography using DRTB method.

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