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A new procedure has been developed to treat aneurysms, particularly those that occur near the brain stem, where surgery is dangerous. Aneurysms are blood sacs formed by enlargement of the weakened wall of arteries or veins. They are dangerous and thus must generally be removed before they cause considerable damage. If one ruptures, it can cause strokes or fatal hemorrhaging, the latter of which occurs in 50 percent of all patients. Before rupturing, an aneurysm frequently shows no sign or symptom that it exists. Brain aneurysms occur in approximately 5 percent of the population. Most patients are between 40 and 65 years old, with hemorrhages most prevalent in those between 50 and 54.
The new procedure involves inserting a soft, flexible micro-catheter through the femoral artery in the groin area and snaking it up through blood vessels to the brain. Inside the catheter is a small, coiled wire, which can be extruded after it reaches its destination. After the coil is outside the catheter, a low voltage electrical current is applied, and the coil detaches at a preset solder point. Additional coils are snaked through the catheter and also detached at the site, creating a basket, or metal framework, which causes the blood to clot around it. The micro-catheter is withdrawn, the clot remains, and the healed aneurysm no longer is exposed to the stress that can cause another rupture.
The procedure lasts two hours, which is half as long as invasive surgery, and recovery time is generally limited to a few days instead of a few weeks. The procedure was discovered in the 1990s, was approved by the U.S. Food and Drug Administration in 1995, and is available in various hospitals where there are advanced neurology departments and specialists trained in the procedure. Many lives have been saved by use of the procedure, because the alternative would have been to watch and wait rather than risk the hazards of surgery.
1.The author implies that the procedure described is useful for ______
A. all aneurysms.
B. aneurysms that occur near the brain stem only.
C. aneurysms that occur anywhere in the brain.
D. aneurysms that occur near large blood vessels.
2.The word “They” in the first paragraph refers to ______
A. ProceduresB. aneurysms.C. brain stems.D. surgeries.
3.The word “snaking” in the second paragraph is closest in meaning to ______
A. meandering.B. extruding.C. living.D. damaging.
A. a hernia.B. an ulcer.C. a heart attack.D. cancer.
5.The author indicates that the point of creating a basket near the aneurysm is to ______
A. dissolve the aneurysm. B. catch the aneurysm when it breaks off.
C. provide a means of studying the aneurysm.D. serve as a base for a blood clot to form.
6.The author indicates that the femoral artery is______
A. small.B. in the upper thigh.
C. in the brain.D. connected to the brain.
7.The author states that the electrical charge is applied in order to______
A. stimulate the brain.B. stimulate theaneurysm.
C. dissolve the aneurysm.D. separate the coil from the wire.
8.The author implies that the wire breaks off ______
A. randomly.
B. inside the micro-catheter.
C. by being cut with an additional tool.
D. at a predetermined and prepared location on the wire
9.According to the passage, traditional surgical techniques take______
A. less time and require less recuperation time than the new procedure.
B. less time but require longer recuperation time than the new procedure.
C. longer but require less recuperation time than the new procedure.
D. longer and require more recuperation time than the new procedure.
10.The author implies that the new procedure______
A. can be performed at any hospital.
B. is performed by any surgeon using special equipment.
C. is performed by certified doctors but requires no special equipment.
D. is performed only at hospitals containing the required equipment and certified doctors.
The new procedure involves inserting a soft, flexible micro-catheter through the femoral artery in the groin area and snaking it up through blood vessels to the brain. Inside the catheter is a small, coiled wire, which can be extruded after it reaches its destination. After the coil is outside the catheter, a low voltage electrical current is applied, and the coil detaches at a preset solder point. Additional coils are snaked through the catheter and also detached at the site, creating a basket, or metal framework, which causes the blood to clot around it. The micro-catheter is withdrawn, the clot remains, and the healed aneurysm no longer is exposed to the stress that can cause another rupture.
The procedure lasts two hours, which is half as long as invasive surgery, and recovery time is generally limited to a few days instead of a few weeks. The procedure was discovered in the 1990s, was approved by the U.S. Food and Drug Administration in 1995, and is available in various hospitals where there are advanced neurology departments and specialists trained in the procedure. Many lives have been saved by use of the procedure, because the alternative would have been to watch and wait rather than risk the hazards of surgery.
1.The author implies that the procedure described is useful for ______
A. all aneurysms.
B. aneurysms that occur near the brain stem only.
C. aneurysms that occur anywhere in the brain.
D. aneurysms that occur near large blood vessels.
2.The word “They” in the first paragraph refers to ______
A. ProceduresB. aneurysms.C. brain stems.D. surgeries.
3.The word “snaking” in the second paragraph is closest in meaning to ______
A. meandering.B. extruding.C. living.D. damaging.
A. a hernia.B. an ulcer.C. a heart attack.D. cancer.
5.The author indicates that the point of creating a basket near the aneurysm is to ______
A. dissolve the aneurysm. B. catch the aneurysm when it breaks off.
C. provide a means of studying the aneurysm.D. serve as a base for a blood clot to form.
6.The author indicates that the femoral artery is______
A. small.B. in the upper thigh.
C. in the brain.D. connected to the brain.
7.The author states that the electrical charge is applied in order to______
A. stimulate the brain.B. stimulate theaneurysm.
C. dissolve the aneurysm.D. separate the coil from the wire.
8.The author implies that the wire breaks off ______
A. randomly.
B. inside the micro-catheter.
C. by being cut with an additional tool.
D. at a predetermined and prepared location on the wire
9.According to the passage, traditional surgical techniques take______
A. less time and require less recuperation time than the new procedure.
B. less time but require longer recuperation time than the new procedure.
C. longer but require less recuperation time than the new procedure.
D. longer and require more recuperation time than the new procedure.
10.The author implies that the new procedure______
A. can be performed at any hospital.
B. is performed by any surgeon using special equipment.
C. is performed by certified doctors but requires no special equipment.
D. is performed only at hospitals containing the required equipment and certified doctors.
