Changes in the intraaneurysmal pressure due to HydroCoil embolization.

Area of Science:

• Biomedical Engineering
• Neurosurgery
• Medical Device Technology

Background:

• Aneurysm packing is a common endovascular treatment.
• Hydrogel-coated coils offer potential advantages in aneurysm embolization.
• Understanding pressure dynamics within treated aneurysms is critical for patient outcomes.

Purpose of the Study:

• To evaluate the impact of hydrogel-coated coil packing density on intraaneurysmal fluid pressure.
• To assess changes in parent vessel flow characteristics post-embolization.
• To determine the safety profile of high-density coil packing.

Main Methods:

• Utilized a silicone model of a basilar tip aneurysm.
• Embolized the aneurysm model using platinum coils coated with an expansible hydrogel.
• Measured intraaneurysmal fluid pressure using a Camino Pressure Micro-Probe at varying coil densities.
• Simulated physiological pulsatile flow in the parent artery using a programmable pump.

Main Results:

• Intraaneurysmal fluid pressure remained unchanged even at high coil packing densities (up to 93%).
• No significant increase in pressure was observed with increasing coil density.
• Parent vessel flow characteristics were not detailed in the provided abstract but were part of the study's scope.

Conclusions:

• High-density packing (up to 93%) of aneurysms with hydrogel-coated coils does not elevate intraaneurysmal fluid pressure.
• This suggests a potentially favorable safety profile for this embolization technique.
• Further research may explore long-term stability and efficacy.