Search PubMed⌕ Search

Biomedical subjects

T Onuma

Publications and source records attributed to T Onuma.

At least 127 records · Page 7Linked to original sources
PubMed1982

Surgical treatment of intracranial arteriovenous malformation.

The surgical indication and techniques of intracranial arteriovenous malformations are discussed, on the basis of 203 experiences with AVMs. A special key point in our surgical techniques is described as follows. The feeding arteries of the AVM--or the main artery at the base of the brain, which is the original source of the feeding artery--are identified and prepared, and then temporary clips are placed on these arteries to produce vascular occlusion prior to the dissection of the AVM itself. During these procedures, 20% of mannitol should be administered to prolong the permissible time of cerebral artery occlusion. The administration method of mannitol is described in detail including dose and time schedule. The new prolongation method of temporary occlusion time, for which mannitol with fluorochemicals permits longer occlusion time, is also introduced.

Cerebral Angiography↗
PubMed1981

[Traumatic middle meningeal arterio-venous fistula--a case of bilateral occurrence (author's transl)].

A case of traumatic middle meningeal arterio-venous fistula was reported. The present case reported here appears to be unique because of its bilateral occurrence. As for traumatic middle meningeal arterio-venous fistula, we could not find any case with bilateral occurrence in the literature. Bilateral carotid angiograms revealed extravasation in the extradural spaces. Draining veins were found pouring into the superior sagittal sinus and also into the transverse sinus. This was also thought to be rare. We discussed to some extent on the etiology, diagnosis, angiographical findings and treatment of this disease.

Adult↗
PubMed1981

[Direct surgical treatment of giant intracranial aneurysms (author's transl)].

This report discusses the surgical techniques employed in the 27 cases of giant aneurysm of the brain in which direct operations were performed at the Department of Neurosurgery of Tohoku University from 1961 to 1979. The report also provides a review of the operative results and long-term result of these cases. The conclusions are as follows: 1) Whenever possible, direct operation was implemented in all cases with the exception of infraclinoid ones. The propriety of the neck treatment greatly affected the mortality of the operation. 2) In most cases, there are more difficulties involved in radical surgery on giant aneurysms than on ordinary aneurysms. Temporary occlusion of the afferent and or efferent arteries under the administration of 800 to 1000 microliters 20% mannitol is thought to be a safe and effective method for procedures such as treatment of the aneurysmal neck. 3) In the case of a giant aneurysm of the internal carotid artery, STA-MCA anastomosis was performed before the ligation of the internal carotid artery and this method gave better results than direct operation.

Adolescent↗
PubMed1980

[Intracerebral hemorrhage from meningioma (author's transl)].

A case of asymptomatic convexity meningioma causing intracerebral hemorrhage and with an aneurysm of the branch of the middle cerebral artery is reported. Operation disclosed an encapsulated tumor of 4 cm in diameter and intracerebral hemorrhage was found medial to it. Histological diagnosis of the tumor was a malignant meningioma. The mechanism of hemorrhage and the relation between the tumor and occurrence of an aneurysm have been discussed with a review of the literature.

Adult↗
PubMed1979

Surgical treatment of giant intracranial aneurysms.

The authors report the cases of 32 patients with aneurysms measuring 2.5 cm or greater in diameter found among 1080 patients with saccular cerebral aneurysms. Of the 32 patients, 24 patients were treated by direct operation, four by common carotid ligation, and the other four by conservative therapy. The appropriateness of surgery and surgical method are discussed.

Adolescent↗