Details

Autor(en) / Beteiligte

• Aramburu, Jorge
• Antón, Raúl
• Rivas, Alejandro
• Ramos, Juan Carlos
• Sangro, Bruno
• Bilbao, José Ignacio

Titel

The role of angled‐tip microcatheter and microsphere injection velocity in liver radioembolization: A computational particle–hemodynamics study

Ist Teil von

• International journal for numerical methods in biomedical engineering, 2017-12, Vol.33 (12), p.n/a

Ort / Verlag

England: Wiley Subscription Services, Inc

Erscheinungsjahr

2017

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• Liver radioembolization is a promising treatment option for combating liver tumors. It is performed by placing a microcatheter in the hepatic artery and administering radiation‐emitting microspheres through the arterial bloodstream so that they get lodged in the tumoral bed. In avoiding nontarget radiation, the standard practice is to conduct a pretreatment, in which the microcatheter location and injection velocity are decided. However, between pretreatment and actual treatment, some of the parameters that influence the particle distribution in the liver can vary, resulting in radiation‐induced complications. The present study aims to analyze the influence of a commercially available microcatheter with an angled tip and particle injection velocity in terms of segment‐to‐segment particle distribution. Specifically, 4 tip orientations and 2 injection velocities are combined to yield a set of 8 numerical simulations of the particle‐hemodynamics in a patient‐specific truncated hepatic artery. For each simulation, 4 cardiac pulses are simulated. Particles are injected during the first cycle, and the remaining pulses enable the majority of the injected particles to exit the computational domain. Results indicate that, in terms of injection velocity, particles are more spread out in the cross‐sectional lumen areas as the injection velocity increases. The tip's orientation also plays a role because it influences the near‐tip hemodynamics, therefore altering the particle travel through the hepatic artery. However, results suggest that particle distribution tries to match the blood flow split, therefore particle injection velocity and microcatheter tip orientation playing a minor role in segment‐to‐segment particle distribution. Radioembolization is a promising treatment option to combat liver tumors. This article presents a computational particle–hemodynamics analysis in a patient‐specific hepatic artery under a realistic cancer scenario. The role of the orientation of the tip and the particle injection velocity in particle distribution are illustrated. Results show that particle distribution tends to follow the flow split; ie, the effect of tip orientation‐caused and injection velocity‐caused near‐tip hemodynamics alteration seems to vanish in terms of downstream particle distribution.