Detachable platinum coil

Murphy KJ, Houdart E, Szopinski KT,et al.(2001) Mechanical detachable platinum coil report of the European phase II clinical trial in 60 patients. Radiology 219 541-... 

There is a great variety of different coils currently available. Stainless steel coils have been used for a long time for peripheral embolizations. Due to an attached Dacron fibre they are extremely thrombo-genic, facilitating even parent vessel occlusion. They might be increasingly used for this indication, if detachable balloons are really not available any more. However, for cerebral embolizations they are too stiff. Platinum coils are much softer than stainless steel coils. Meanwhile, there exist different types of CE marked detachable platinum coils provided... 

Matrix detachable coils (Boston Scientific Neurovascular) are another example of modified endovascular coils, employing a stainless steel delivery wire coated with a bioabsorbable copolymer of 90% polyglycolide and 10% polylactide. In a study by Murayama et al. (2003), matrix detachable coils were shown to accelerate the rate of aneurysm healing in swine aneurysm models, specifically by promoting the formation of a thick neointimal layer at the aneurysm neck more quickly bare platinum coils (Murayama et al, 2003). Taschner et al. (2005) evaluated the use of Matrix detachable coils in 25 patients with intracranial aneurysms. Again, stable emboUzed aneurysms were achieved over a six-month period, but only when Matrix coils were used in conjunction with bare platinum coils (Taschner et al, 2005). 

Stainless steel or platinum coils and detachable balloons are rarely used as aprimaryembolicagentinbron-chial artery embolization. Although these can be used to occlude a pathologic bronchial artery efficiently, use of coils predudes repeat embolization, which is often needed as patients are prone to distal collateralization (Fig. 16.21) [43,44]. The primary indication for use of coils is in patients with a bronchial artery aneurysm. Secondly, in cases where a superselective position of a (micro) catheter cannot be reached, coils can be used to protect a normal distal vascular territory against inadvertent embolization [25]. 

Emholic material Steel coils Platinum microcoils if co-axial system used 1. Glue 2. Thrombin 3. Long detachable coils or detachable balloons if the aneurysm must be packed Unless the haemorrhage is immediately life threatening (see Fig. 7.3) do not use Particles Gelfoam Autologous blood... 

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