A numerical study on the effect of side hole number and arrangement in venous cannulae

Park, J.Y.; Park, C.Y.; Min, Byoung Goo

doi:10.1016/j.jbiomech.2006.04.005

Cited by 37 publications

(44 citation statements)

References 4 publications

(4 reference statements)

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“…I evaluated the effect of the number and angle of side holes on cannula flow rates and SRs. As previously reported [5], the cannulae with no side holes (NSH) had the highest flow rate (2.03 L/min) (Figure 5). The flow rates of cannulae in which the side holes had no slant (0°) decreased as the number of side holes increased from 4 to 12 (blue dash-dot line, Figure 5(a)).…”

Section: Resultssupporting

confidence: 80%

“…It is clear that the SR is strongly related to the amount of flow rate, however, the higher number of side holes are effective in reducing the shear stress. In addition, although wall shear stress is not dealt with in this research directly, it should be noted that the wall shear stress level is proportional to SR level in cannulae [5]. …”

Section: Resultsmentioning

confidence: 99%

“…It was assumed that the cannula (inner diameter: 7 mm) was concentrically placed in a blood vessel of 20 mm diameter, similar to the size of the iliac vena cava [9] (Figure 1(a)). The models include no side hole model (NSH) and staggered array models (SA) [5] with different numbers (4, 8, and 12) and angles (0°, 15°, 30°, and 45°) of side holes (Figure 1(b)). The angle ( θ ) represents the rotation of the hole from its original vertical position (Figure 1(c)), with the hole diameter (2 mm) kept constant.…”

Section: Methodsmentioning

confidence: 99%

“…Grigioni et al proposed a full-scale computational model for a cannula with side holes to predict the mechanical blood trauma and emphasized that a small shear stress can be a possible clinical problem [3, 4]. Also Park et al examined the effect of the number and position of side holes on flow rate and shear stress using CFD and proposed a appropriate design of venous cannula with staggered array of side holes in view point of flow rate and shear rate [5]. However, none of previous studies have shown the effect of the slant angle of side holes in venous cannulae, while the angle of cannula side holes should be included as a primary parameter for the design and the study on its effects on hemodynamics such as local flow pattern, overall flow rate, and shear stress.…”

Section: Introductionmentioning

confidence: 99%

“…Four different side hole angles (0°, 15°, 30°, 45°) and four different numbers of side holes (0, 4, 8, 12) were selected to investigate the effect of venous cannula design on function. Based on my previous study that shows a slight better performance found in staggered array of side holes [5], I adopted the staggered array for this study. For understanding the reason of the angle effect, I also proposed a new parameter, named “penetration depth (PD),” that explains a flow-mixing relationship between the main stream and the other streams from side holes.…”

Section: Introductionmentioning

confidence: 99%

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The Need of Slanted Side Holes for Venous Cannulae

Park

2012

Computational and Mathematical Methods in Medicine

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Well-designed cannulae must allow good flow rate and minimize nonphysiologic load. Venous cannulae generally have side holes to prevent the rupture of blood vessel during perfusion. Optimizing side hole angle will yield more efficient and safe venous cannulae. A numerical modeling was used to study the effect of the angle (0°–45°) and number (0–12) of side holes on the performance of cannulae. By only slanting the side holes, it increases the flow rate up to 6% (in our models). In addition, it was found that increasing the number of side holes reduces the shear rate up to 12% (in our models). A new parameter called “penetration depth” was introduced to describe the interfering effect of stream jets from side holes, and the result showed that the 45°-slanted side holes caused minimum interfering for the flow in cannula. Our quantitative hemodynamic analysis study provides important guidelines for venous cannulae design.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Need of Slanted Side Holes for Venous Cannulae

Park

2012

Computational and Mathematical Methods in Medicine

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Hemodynamic performance evaluation of neonatal ECMO double lumen cannula using fluid–structure interaction

Ahmad

Cheema

Rehman

et al. 2023

Numer Methods Biomed Eng

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Extra corporeal membrane oxygenation (ECMO) is an artificial oxygenation facility, employed in situations of cardio‐pulmonary failure. Some diseases i.e., acute respiratory distress syndrome, pulmonary hypertension, corona virus disease (COVID‐19) etc. affect oxygenation performance of the lungs thus requiring the need of artificial oxygenation. Critical care teams used ECMO technique during the COVID‐19 pandemic to support the heart and lungs of COVID‐19 patients who had an acute respiratory or cardiac failure. Double Lumen Cannula (DLC) is one of the most critical components of ECMO as it resides inside the patient and, connects patient with external oxygenation circuit. DLC facilitates delivery and drainage of blood from the patient's body. DLC is characterized by delicate balance of internal and external flows inside a limited space of the right atrium (RA). An optimal performance of the DLC necessitates structural stability under biological and hemodynamic loads, a fact that has been overlooked by previously published studies. In the past, many researchers experimentally and computationally investigated the hemodynamic performance of DLC by employing Eulerian approach, which evaluate instantaneous blood damage without considering blood shear exposure history (qualitative assessment only). The present study is an attempt to address the aforementioned limitations of the previous studies by employing Lagrangian (quantitative assessment) and incorporating the effect of fluid–structure interaction (FSI) to study the hemodynamic performance of neonatal DLC. The study was performed by solving three‐dimensional continuity, momentum, and structural mechanics equation(s) by numerical methods for the blood flow through neonatal DLC. A two‐way coupled FSI analysis was performed to analyze the effect of DLC structural deformation on its hemodynamic performance. Results show that the return lumen was the most critical section with maximum pressure drop, velocity, shear stresses, and blood damage. Recirculation and residence time of blood in the right atrium (RA) increases with increasing blood flow rates. Considering the structural deformation has led to higher blood damage inside the DLC‐atrium system. Maximum Von‐Mises stress was present on the side edges of the return lumen that showed direct proportionality with the blood flow rate.

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