Principle of coil action

Model: Circle of Willis Aneurysm Ⅲ (SJK002D)

Intracranial aneurysm is a common cerebrovascular disease in neurosurgery. It refers to the weak part of the intracranial arterial wall. Under the action of blood flow and blood pressure, it bulges out abnormally and looks a bit like a tumor, so it is called an aneurysm. The treatment of intracranial aneurysms mainly includes craniotomy clipping and interventional embolization. Interventional embolization is to enter the aneurysm through the blood vessel (femoral artery), use materials to fill the aneurysm, prevent blood flow from entering the cerebral aneurysm, and thus separate the aneurysm from the blood flow. Interventional surgery is a minimally invasive surgery with small trauma, fast recovery and good effect. The most commonly used material for interventional embolization of intracranial aneurysms is a coil, which is a platinum wire with a soft texture. In the embolization operation, a microcatheter is inserted into the aneurysm cavity, and then a push rod is used to push the coil into the aneurysm cavity through the microcatheter.

When the coil is stable in the aneurysm cavity, the connection between the push rod and the coil is released, the push rod is withdrawn from the microcatheter, and then the next coil is ready to be delivered. When blood flows into the aneurysm, many small vortices will form on the edge of the aneurysm wall, like a river, and these vortices will slow down the blood flow. Putting a coil into the aneurysm actually artificially increases the slowing of blood flow, and the blood flow becomes very slow, basically stagnating in a short period of time, forming a blood clot, and the pressure inside the aneurysm will drop significantly, making the possibility of rupture very small.

This model is a whole-brain artery model fixed within an acrylic box, providing a stronger sense of three-dimensional spatial representation. The model includes aneurysms on the ophthalmic segment, basilar artery, carotid artery, and MCA. It is specifically designed to simulate aneurysm tamponade operation. The location and size of the aneurysms can be customized as required.