For example, vaso-occlusion devices are surgical implements or implants that are placed within the vasculature of the human body, typically via a catheter, either to block the flow of blood through a vessel making up that portion of the vasculature through the formation of an embolus or to form such an embolus within an aneurysm stemming from the vessel. Cerebral aneurysms are usually detected in patients as the result of a seizure or hemorrhage and can result in significant morbidity or mortality.There are a variety of materials and devices which have been used for treatment of peripheral and neurovascular aneurysms, including platinum and stainless steel microcoils, polyvinyl alcohol sponges (Ivalone), and other mechanical devices. Rupture of an aneurysm in the brain causes stroke, and rupture of an aneurysm in the abdomen causes shock. For example, an aneurysm is a dilation of a blood vessel that poses a risk to health from the potential for rupture, clotting, or dissecting. In particular, detachment mechanisms that change configuration to deploy an implantable device such as an embolic device and assemblies comprising these detachment mechanisms are described.BACKGROUNDImplantable devices are used for many indications including in the reproductive tract (e.g., uterine artery, fallopian occlusion), billiary implants and/or for peripheral and neurovasculature indications. TECHNICAL FIELDCompositions and methods for implanting devices are described.
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