| 摘要 |
A vascular occluder 10 includes first and second baffle members 14,16 which are formed of an expansion device such as a stent 18,20 across which extends an impermeable membrane 22, 24. The baffle members 14,16 are held at a given separation by spacer elements 28, 30. The separation creates a chamber 26 between the baffle members 14, 16 in which the blood is able to stagnate, thereby creating a second occlusion barrier. One of the baffle members 16 may have an aperture within its membrane 24 for receiving a delivery catheter for delivery of thrombogenic agent into the chamber 26. The occluder 10 has a given length, thereby making it suitable for implantation in difficult vessel sections and is also able to avoid problems of recanalization of the vessel which can occur with prior art occluders. |
