| 摘要 |
A collapsible and deployable filter for blocking debris and passing blood in a blood vessel in a patient's body, the filter including; a framework of a flexible material, constructed to have a radially compressed state, in which the framework is radially compressed by radial deforming forces, and a radially expanded state to obdurate an artery; and a flexible filter material secured to said framework and having pores dimensioned to prevent the passage of debris therethrough while allowing the passage of blood. The filter has, in the radially expanded state of the framework, a generally conical or frustoconical form with a large diameter end, a small diameter end opposite to the large diameter end, and a side surface extending between the ends. The filter has an opening that is free of filter material at the small diameter end or in the side surface. |
| 主权项 |
1. A device for trapping debris produced during a surgical procedure performed on a patient, said device comprising:
a collapsible and deployable filter for blocking debris and passing blood in a blood vessel in a patient's body, a guidewire connected to said filter, and a sheath in which said filter is housed,said filter comprising;
a framework of a flexible material, said framework being constructed to have a radially compressed state, in which said framework is radially compressed by radial deforming forces, and a radially expanded state; and a flexible filter material secured to said framework and having pores dimensioned to prevent the passage of debris therethrough while allowing the passage of blood, wherein: said filter has, in the radially expanded state of said framework, a generally conical form with a large diameter end, a closed end opposite to said large diameter end, and a side surface extending between said large diameter end and end; said flexible filter material covers the entirety of said side surface from said large diameter end to said closed end; and said large diameter end is open to receive blood and debris and is dimensioned to prevent flow of blood between said large diameter end and the blood vessel wall when said framework is in the radially expanded state;said sheath having a distal end and having a length and flexibility sufficient to extend through the patient's blood vessels and heart from a point outside the patient's body to the patient's pulmonary artery;said guidewire extending through said sheath and having a distal end connected to said closed end of said filter with said filter being oriented,wherein said filter is extendable from said distal end of said sheath and is movable, with the aid of said guidewire, between said radially compressed state within said sheath and said radially expanded state when said filter is extended from said distal end of said sheath, andsaid filter is oriented such that said large diameter end faces said distal end of said sheath when said filter is extended from said distal end of said sheath. |
