Scranton Times Tribune -
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Published on: 10/9/2001
Last Visited: 10/11/2001
Harvard neurosurgeon Dr. Edward R. Smith told United Press International he and his colleagues have used the procedure , called hemicraniectomy , in 18 patients and the results are very promising.
He presented results from the first eight patients at the American College of Surgeons meeting in New Orleans.
He said hemicraniectomy is done as soon as the patient is diagnosed.The surgeons remove the skull flap , drain the blood from the brain and clip off the aneurysm to prevent additional bleeding.Traditionally , the skull flap is reattached at this point.
In the hemicraniectomy , the flap is removed and sewn under the skin of the abdomen , where it stays until it is reattached.Storing the flap in the abdomen serves two purposes : it keeps it with the patient and it keeps the bone sterile , Smith said.
The brain itself is covered by a leathery substance called dura.Surgeons add a graft to the dura so that it can expand if necessary.By leaving part of the skull open , physicians are able to accurately diagnose the two most common complications of brain hemorrhage : brain swelling or vasospasm.
Smith said the brain can swell days after the initial injury from the aneurysm.Vasospasm , which occurs when the blood vessels in the brain constrict , also takes several days to develop..Smith said it is very difficult to differentiate between the two because both have similar clinical symptoms : grogginess and confusion.
But if you don't know which symptom is present , you don't know what treatment to use , he said.
Treatment for vasoconstriction calls for increasing blood pressure and fluid volume , both of which are dangerous in a person whose brain is swelling.Conversely , treating swollen brains requires therapies that cause constriction of blood vessels , he said.
The brain flap is reattached nine to 12 weeks after initial surgery , said Smith.During that time people wear helmets to protect the brain , he said.
In a pilot study with eight patients who were already comatose when they arrived at the hospital , five of the eight are now back living normal , productive lives..
One patient is in fair condition and two are in poor condition , requiring constant nursing care.But historically patients with the same diagnosis would all be dead or in poor condition by now , the study said.
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Smith said that about one in 20 Americans have aneurysms , but only about 40 , 000 aneurysms rupture each year.
Most people live into old age with their aneurysms , he said.The initial symptom is the worst headache you ever had , he added.
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Smith said it was difficult to comment on Stone's condition , but he noted most people with subarachnoid hemorrhage are in very bad shape when the arrive at the hospital..
He added that hemicraniectomy should be reserved for those aneurysms that cause a large , very focal blood clot..