Optimal sizing of iliac vein stents

Raju, Seshadri; Buck, William; Crim, William; Jayaraj, Arjun

doi:10.1177/0268355517718763

Cited by 104 publications

(46 citation statements)

References 14 publications

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“…However, our results are at the upper end of the values reported in the literature for CIV diameters: e.g. 11.2 ± 3.3 mm, 11 11.5 mm (range 8.7-13.9 mm), 39 and 11.5 mm (range 6.3-16.1 mm). 37 Additionally, our selected anatomy has a relatively small diameter of the right CIV and the angles between IVC and CIVs are only just inside the interquartile range.…”

Section: Discussionsupporting

confidence: 44%

Long-Term Venovenous Connection for Extracorporeal Carbon Dioxide Removal (ECCO2R)–Numerical Investigation of the Connection to the Common Iliac Veins

Steuer

Hugenroth

Beck

et al. 2020

Cardiovasc Eng Tech

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Purpose-Currently used cannulae for extracorporeal carbon dioxide removal (ECCO 2 R) are associated with complications such as thrombosis and distal limb ischemia, especially for long-term use. We hypothesize that the risk of these complications is reducible by attaching hemodynamically optimized grafts to the patient's vessels. In this study, as a first step towards a long-term stable ECCO 2 R connection, we investigated the feasibility of a venovenous connection to the common iliac veins. To ensure its applicability, the drainage of reinfused blood (recirculation) and high wall shear stress (WSS) must be avoided. Methods-A reference model was selected for computational fluid dynamics, on the basis of the analysis of imaging data. Initially, a sensitivity analysis regarding recirculation was conducted using as variables: blood flow, the distance of drainage and return to the iliocaval junction, as well as the diameter and position of the grafts. Subsequently, the connection was optimized regarding recirculation and the WSS was evaluated. We validated the simulations in a silicone model traversed by dyed fluid. Results-The simulations were in good agreement with the validation measurements (mean deviation 1.64%). The recirculation ranged from 32.1 to 0%. The maximum WSS did not exceed 5.57 Pa. The position and diameter of the return graft show the highest influence on recirculation. A correlation was ascertained between recirculation and WSS. Overall, an inflow jet directed at a vessel wall entails not only high WSS, but also a flow separation and thereby an increased recirculation. Therefore, return grafts aligned to the vena cava are crucial. Conclusion-In conclusion, a connection without recirculation could be feasible and therefore provides a promising option for a long-term ECCO 2 R connection.

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Section: Discussionsupporting

confidence: 44%

Long-Term Venovenous Connection for Extracorporeal Carbon Dioxide Removal (ECCO2R)–Numerical Investigation of the Connection to the Common Iliac Veins

Steuer

Hugenroth

Beck

et al. 2020

Cardiovasc Eng Tech

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“…Hence its rupture may go unnoticed till late stage. Iliac vein stent placing is done in case of iliac vein disease [11].…”

Section: Discussionmentioning

confidence: 99%

Dangerous twisted communications between external and internal iliac veins which might rupture during catheterization

Nayak

2018

Anat Cell Biol

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In this report, four unusual communications between external and internal iliac veins of the left side have been presented. The lowest communication was the narrowest measuring about 2 mm in diameter, the second measured 6 mm, the third had a diameter of 7 mm and the last communication measured 5 mm in breadth. The upper three communications were twisted in a helical manner. The internal iliac vein had its normal tributaries except that the iliolumbar vein drained into the external iliac vein at the level of the third communication. The external iliac vein was slightly dilated just below the level of lowest communication.

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“…1): ▪ Der Durchmesser der Venen ist größer als der Durchmesser der entsprechenden Arterien. Für die venöse iliakale Rekanalisation werden Stents mit einem Durchmesser von 14 -18 mm verwendet [5]. ▪ Die Länge der postthrombotischen Läsionen ist zumeist sehr ausgedehnt, sodass längere Stents benötigt werden.…”

Section: Endovaskuläre Therapieunclassified

Endovenöse Rekanalisationen von chronischen Beckenvenenverschlüssen

Lichtenberg¹

2019

Gefäßmedizin Scan

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Optimal sizing of iliac vein stents

Cited by 104 publications

References 14 publications

Long-Term Venovenous Connection for Extracorporeal Carbon Dioxide Removal (ECCO2R)–Numerical Investigation of the Connection to the Common Iliac Veins

Long-Term Venovenous Connection for Extracorporeal Carbon Dioxide Removal (ECCO2R)–Numerical Investigation of the Connection to the Common Iliac Veins

Dangerous twisted communications between external and internal iliac veins which might rupture during catheterization

Endovenöse Rekanalisationen von chronischen Beckenvenenverschlüssen

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