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Featured researches published by Iwao Saiki.


Surgical Neurology | 1985

Multiple meningiomas in the posterior fossa

Takayuki Nagano; Iwao Saiki; Haruyuki Kanaya

A case of multiple meningiomas in the posterior fossa is reported. Computed tomography scans clearly demonstrated the tumors. They were removed completely and the patient was discharged without any neurological deficits. The clinical features are discussed and the pertinent literature is reviewed.


No shinkei geka. Neurological surgery | 1989

A Case of Isolated Fourth Ventricle Due to Ruptured Cerebral Aneurysm

Mineko Murakami; Akira Takahashi; Toshiharu Murakami; Hideo Endo; Iwao Saiki; Haruyuki Kanaya

We present a case of isolated fourth ventricle which developed after massive ventricular hemorrhage, due to a ruptured cerebral aneurysm. In an adult an isolated fourth ventricle seems to be very rare, also the symptom of unconsciousness and respiratory arrest and the rapid development in this case seemed very unusual. The aqueductal occlusion was considered to be related to the intraventricular hematoma which remained as clots over a 2-month-period of time. This case was a 57-year-old woman admitted to our hospital in a state of coma. CT showed a massive ventricular hematoma and right carotid angiogram showed an aneurysm of the anterior communicating artery. Bilateral ventricular drainage was performed because of progressive decerebrate rigidity. Since consciousness gradually arose to the Japan Coma Scale 3, clipping of the neck of the aneurysm was performed 25 days after onset. Premature rupture occurred during the operation. After surgery, CT Showed ring-like high densities due to the premature rupture of aneurysm in both lateral ventricles, and also in the fourth ventricle as well. Although the lateral ventricles drainage functioned effectively, the fourth ventricle showed remarkable gradual dilatation. The patient was stuporous, but respiratory arrest occurred suddenly 43 days after onset. Since it was considered that the intraventricular hematoma blocked the aqueduct, the same as in the outlet of the fourth ventricle and that the dilated fourth ventricle compressed the brain stem, the ventriculostomy was performed through suboccipital craniectomy. The cerebellar hemispheres showed remarkable swelling bilaterally, and no cerebrospinal fluid was found in the cisterna magna.(ABSTRACT TRUNCATED AT 250 WORDS)


Neurologia Medico-chirurgica | 1971

52. Neurological Analysis on Surgical Indication of Hypertensive Intracerebral Hemorrhage and its Results

Haruyuki Kanaya; Kenichi Osama; Eiji Onodera; Setsuo Ono; Yasuhiro Kuzu; Kenji Tamura; Iwao Saiki; Ryu Aizawa; Katsumaro Oana; Koichiro Furukawa; Toyo Kobayashi

2) The recovery of hemiplegia could not be expected in cases with hematoma extended into lateral ventricle destructing the internal capsule. The major aim of surgery is life saving in these cases. 3) The prognosis for hemiplegia by the surgical evacuation was significantly better than that of conservative management in cases with the hematoma spread into a part of the posterior limb of internal capsule. Surgery is advisable for this type of hemorrhage. 4) The severity and prognosis of hemiplegia in putanimal hemorrhage was


No shinkei geka. Neurological surgery | 1988

[Multiple arteriovenous malformations of left parietal lobe and left cerebellar hemisphere with symptomatic trigeminal neuralgia: a case report].

Nishizawa Y; Tsuiki K; Miura K; Murakami M; Kirikae M; Hakozaki S; Iwao Saiki; Haruyuki Kanaya


No shinkei geka. Neurological surgery | 1990

Meningioma of pineal region

Toyota A; Akira Takahashi; Yoshida Y; Toshiharu Murakami; Iwao Saiki; Haruyuki Kanaya


Neurologia Medico-chirurgica | 1988

Acute Subdural Hematoma in Judo Practitioners

Kenichi Nishimura; Kiyotaka Fujii; Ryutaro Maeyama; Iwao Saiki; Shuji Sakata; Katsutoshi Kitamura


No shinkei geka. Neurological surgery | 1989

[Transverse sinus thrombosis accompanied by intracerebellar hemorrhage: a case report].

Ushiwata I; Iwao Saiki; Murakami T; Haruyuki Kanaya; Konno J; Wada S


No shinkei geka. Neurological surgery | 1987

A case of cavernous angioma of the middle cranial fossa originating in the cavernous sinus with hyperprolactinemia

Tsuiki K; Abe S; Chiba M; Murakami H; Iwao Saiki; Haruyuki Kanaya


Journal of Neurosurgery | 1968

The Use of Echoencephalography to Differentiate Intracerebral Hemorrhage and Brain Softening

Haruyuki Kanaya; Hideo Yamasaki; Iwao Saiki; Koichiro Furukawa


Neurologia Medico-chirurgica | 1976

[Surgical treatment of hypertensive intracerebral hemorrhage. Experience with 174 cases (author's transl)].

Haruyuki Kanaya; Kenichi Nishimura; Iwao Saiki; Katsumaro Oana; Tadao Ohuchi

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Akira Takahashi

Nara Institute of Science and Technology

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Hideo Yamasaki

Iwate Medical University

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Katsumaro Oana

Iwate Medical University

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Akira Kamimura

Iwate Medical University

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Atsushi Ohira

Iwate Medical University

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