1-8. (canceled)
9. A device for treating a blood vessel aneurysm, said aneurysm being connected to said vessel by a neck, comprising: two wires comprising shape memory alloy, wherein said two wires have been thermo-mechanically pre-conditioned to a memorized twisted configuration; and wherein when said two wires are deployed on opposite sides of said neck of said aneurysm and caused to adopt said twisted configuration, said wires are capable of pressing said neck of said aneurysm substantially closed.
10. The device of claim 9, wherein said aneurysm is an intracranial aneurysm.
11. The device of claim 9 or 10, wherein said shape memory alloy is NiTinol.
12. A device for treating a blood vessel aneurysm, comprising:
a) a guiding catheter and a guiding needle, wherein said guiding catheter is adapted to deploy said guiding needle in a blood vessel, said blood vessel having a wall and a lumen, and wherein said guiding needle is adapted to perforate said wall of said blood vessel;
b) a first wire comprising a shape memory alloy and a second wire comprising a shape memory alloy, wherein said first and second wires have been thermo-mechanically pre-set to twisted shapes;
c) said guiding needle adapted to guide said first wire through said blood vessel wall to be deployed at a first side of said aneurysm and adapted to guide said second wire through said blood vessel wall to be deployed at a second side of said aneurysm, wherein said second side is opposite said first side of the aneurysm; and
wherein said first and second wires are capable of being substantially reverted to said pre-set twisted shapes to form a mutually twisted conformation, thereby substantially closing off said aneurysm from said blood vessel.
13. The device of claim 12, wherein said aneurysm is an intracranial aneurysm.
14. The device of claim 12 or 13, wherein said shape memory alloy is NiTinol.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An ejector decompression device for a vapor compression refrigerant cycle that includes a compressor for compressing refrigerant, a refrigerant radiator for cooling refrigerant discharged from the compressor and an evaporator for evaporating low-pressure refrigerant after being decompressed, the ejector decompression device comprising:
a nozzle which decompresses refrigerant flowing out of the refrigerant radiator by converting pressure energy of the refrigerant to speed energy thereof; and
a pressure increasing portion which increases a pressure of refrigerant by converting the speed energy of the refrigerant to the pressure energy thereof while refrigerant jetted from the nozzle to an inlet of the pressure increasing portion and refrigerant drawn from the evaporator are mixed,
wherein a coaxial degree of the nozzle with respect to the pressure increasing portion is equal to or lower than 30% of a diameter of the pressure increasing portion at the inlet of the pressure increasing portion.
2. The ejector decompression device according to claim 1, wherein the coaxial degree of the nozzle with respect to the pressure increasing portion is equal to or lower than 20% of the diameter of the pressure increasing portion at the inlet of the pressure increasing portion.
3. The ejector decompression device according to claim 2, wherein the coaxial degree of the nozzle with respect to the pressure increasing portion is equal to or lower than 15% of the diameter of the pressure increasing portion at the inlet of the pressure increasing portion.
4. The ejector decompression device according to claim 1, wherein:
the pressure increasing portion has a taper portion at least in a predetermined range from the inlet of the pressure increasing portion; and
the taper portion is provided to increase a passage sectional area from the inlet of the pressure increasing portion toward an outlet of the pressure increasing portion.
5. The ejector decompression device according to claim 4, wherein:
the pressure increasing portion includes a mixing portion in which the refrigerant jetted from the nozzle and the refrigerant drawn from the evaporator are mixed, and a diffuser which changes kinetic pressure of refrigerant to static pressure thereof; and
the predetermined range of the taper portion is approximately equal to or larger than 10 times of the diameter at the inlet of the pressure increasing portion.
6. The ejector decompression device according to claim 4, wherein:
the nozzle has a center axial line (L1) that is crossed with a center axial line (L2) of the pressure increasing portion by an offset angle (\u2296); and
a taper angle (a) of the taper portion is set to be equal to or larger than twice of the offset angle (\u2296).
7. The ejector decompression device according to claim 1, wherein the coaxial degree of the nozzle with respect to the pressure increasing portion is in a range of 0.3%-30% of the diameter of the pressure increasing portion at the inlet of the pressure increasing portion.
8. The ejector decompression device according to claim 1, wherein the coaxial degree is an offset distance of a center axial line (L1) of the nozzle with respect to a center axial line (L2) of the pressure increasing portion at the inlet of the pressure increasing portion.
9. The ejector compression device according to claim 1, wherein carbon dioxide is used as the refrigerant.
10. An ejector decompression device for a vapor compression refrigerant cycle that includes a compressor for compressing refrigerant, a refrigerant radiator for cooling refrigerant discharged from the compressor and an evaporator for evaporating low-pressure refrigerant after being decompressed, the ejector decompression device comprising:
a nozzle which decompresses refrigerant flowing out of the refrigerant radiator by converting pressure energy of the refrigerant to speed energy thereof: and
a pressure increasing portion which increases a pressure of refrigerant by converting the speed energy of the refrigerant to the pressure energy thereof while refrigerant jetted from the nozzle to an inlet of the pressure increasing portion and refrigerant drawn from the evaporator are mixed wherein:
the pressure increasing portion has a taper portion at least in a predetermined range from the inlet of the pressure increasing portion; and
the taper portion is provided to increase a passage sectional area from the inlet of the pressure increasing portion toward an outlet of the pressure increasing portion; wherein
the predetermined range of the taper portion is approximately equal to or larger than 10 times of the diameter at the inlet of the pressure increasing portion.
11. An ejector decompression device for a vapor compression refrigerant cycle that includes a compressor for compressing refrigerant, a refrigerant radiator for cooling refrigerant discharged from the compressor and an evaporator for evaporating low-pressure refrigerant after being decompressed, the ejector decompression device comprising:
a nozzle which decompresses refrigerant flowing out of the refrigerant radiator by converting pressure energy of the refrigerant to speed energy thereof; and
a pressure increasing portion which increases a pressure of refrigerant by converting the speed energy of the refrigerant to the pressure energy thereof while refrigerant jetted from the nozzle to an inlet of the pressure increasing portion and refrigerant drawn from the evaporator are mixed, wherein:
the pressure increasing portion has a taper portion at least in a predetermined range from the inlet of the pressure increasing portion; and
the taper portion is provided to increase a passage sectional area from the inlet of the pressure increasing portion toward an outlet of the pressure increasing portion; wherein
the nozzle has a center axial line (L1) that is crossed with a center axial line (L2) of the pressure increasing portion by an offset angle (\u2296); and
a taper angle (\u03b1) of the taper portion is set to be equal to or larger than twice of the offset angle (\u2296).