Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-08-02
1991-08-20
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
606195, A61M 2900
Patent
active
050410903
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates generally to medicine, more specifically to radiological surgery (or surgical radiology) and has particular reference to occluding devices which are applicable for treatment of various vascular diseases, preferably large-sized diversely shaped aneurysms.
BACKGROUND OF THE INVENTION
One of the most widespread diseases affecting humans nowadays are vasculopathies of the brain, heart, and other organs. It is surgical treatment that is the most efficacious way of remedying the vascular diseases. Apart from adequately effective surgical techniques such treatment methods incorporate some negative aspects, e.g., high degree of traumatism, especially in cases of cerebrovascular surgery, and severe postoperative complications. Radiological surgery that has gained progress recently is featured by a lower degree of traumatism, a lesser amount of postoperative complications and makes it possible to carry out operative management of vasculopathies in such areas that are amenable neither to conventional vascular surgery nor to microsurgery of blood vessels. Especially hardly amenable to treatment by virtue of radiological surgery are extensive and giant aneurysms, false aneurysms as well as wide-neck aneurysms. At present treatment of the aforesaid aneurysms by the radiological surgery techniques boils down to stationary occlusion of blood vessels carrying the aneurysm. As a rule, such surgical procedures involve gross postoperative complications resulting from ischemia of large tissue areas, especially those of the brain.
Imperfection of the current radiological-surgery instruments impedes successful solution of one of the major problems one now faces in the field of treatment of vasculopathies.
Further progress of radiological surgery has called for the provision of basically novel occluding devices for performing the surgical procedures mentioned above.
One state-of-the-art occluding device (cf. GB 2,045,62l, A) is known to comprise a detachable inflatable balloon intercommunicating with the catheter through an adapter coupling. The balloon is detached from the catheter by burning out the coupling, using an electric heating coil connected to a current source through wire conductors, which are passed inside the catheter, while the heating coil is insulated from the surrounding atmosphere through an additional dielectric sleeve. Such a construction arrangement of the balloon-catheter unit provides for more reliable detachment of the balloon from the catheter but renders it rigid, which prevents the construction from penetrating into the aneurysmal sac or chamber and the efferent vessels. Operative procedures with the use of balloon-catheters of the given type are aimed at stationary occlusion of the afferent vessels and the aneurysm-carrying vessels. This results in a drastic change of the circulation in a given region and in the development of some ischemia-affected areas.
The aforementioned events are extremely undesirable, especially in cases of radiological surgery on cerebral vessels.
The device mentioned above makes it possible in some cases to penetrate into the chambers of extensive and giant aneurysms and wide-neck aneurysms. However, one balloon is insufficient for such aneurysms to cut out of the blood flow, whereas introduction of many such balloons does not provide their interconnection, and their migration within the aneurysmal sac due to the blood flow results in their being expelled from the aneurysms and in occlusion of the vitally important vessels.
One more prior-art balloon-catheter is known to comprise separate balloons and communicating ducts or passages (cf. DE 3,048,923 C.sub.2). The device incorporates two balloons, one of them being a positioning balloon, i.e., that aimed at holding the device in a required place, while the other balloon is the occluding one. Upon having been inflated both of the balloons acquire the same shape of various configuration. Separate passages are for separate injection of a contrast medium and the components of a quick-sett
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Antonenko Vyacheslav G.
Goncharov Alexandr I.
Osaulenko, administrator by Lidia I.
Savenko, administrator Grigory M.
Savenko, administrator Igor A.
Lewis William W.
Rosenbaum C. Fred
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