PubMed Health⌕ Search

Biomedical subjects

H Okudera

Publications and source records attributed to H Okudera.

13 recordsLinked to original sources
PubMed1992

Introduction of high definition television system to neurosurgical documentation.

The high definition television (HDTV) system is introduced to microneurosurgery. Five cases with intracranial lesions: three cerebral aneurysms (giant aneurysms of the anterior communicating artery and internal carotid artery, aneurysm of the basilar artery), one acoustic neurinoma and one skull base meningioma, were operated on under the microscope using the HDTV system. The surgical procedures of each case were relayed and recorded by the system. In two of the five cases, we used two sets of HDTV system to produce stereoscopic projection. The HDTV system provided us with images of superior quality with a distinctly greater resolution than ordinary video systems.

Adult↗
PubMed1992

Suprachiasmal carotid-ophthalmic artery aneurysm--report of two cases.

Two rare suprachiasmal carotid-ophthalmic artery aneurysms, one large and one giant, were discovered incidentally. The patients had no visual disturbances. Angiography showed superomedial projection of the sac. The aneurysms were clipped via an ipsilateral pterional approach. A suprachiasmal carotid-ophthalmic artery aneurysm is indicated when preoperative angiography reveals a superomedial carotid-ophthalmic artery aneurysm without visual disturbances. Direct surgery to clipp a suprachiasmal aneurysm should be carried out to prevent rupture of these frequently large aneurysms.

Aged↗
PubMed1992

A newly designed puncture needle for suction decompression of giant aneurysms. Technical note.

A newly designed puncture needle for aspirating large or giant aneurysms is described. This puncture needle represents a modification of an intravenous catheter with an internal needle. It is designed to prevent blood from leaking when the internal needle is removed and has a lateral tube for aspiration. Following aneurysm puncture with the parent artery temporarily trapped, the catheter is positioned on the head frame with a brain spatula and a self-retaining retractor. Blood is suctioned through the lateral tube with a syringe or the suction system normally used in the operating room.

Equipment Design↗
PubMed1991

Fatal meningitis due to Staphylococcus cohnii. Case report.

We report a case of fatal meningitis due to Staphylococcus (S.) Cohnii in a 63-year-old male. S. Cohnii is often isolated from farm animals and known to be less pathogenic in humans. To our knowledge, S. Cohnii has not yet been reported to cause infection of the central nervous system in humans.

Humans↗
PubMed1991

Development of the operating computerized tomographic scanner system for neurosurgery.

A computerized tomographic (CT) scanner system for intraoperative imaging is presented. The system consists of the following: 1) CT scanner with a mobile gantry, 2) digitally controlled operating table with central processing unit (CPU) and encoder unit; the table can be controlled by the scanner computer as accurately as the scanner bed, and 3) exclusively designed head fixation devices. It allows us to scan the patient on the operating table in the operating room pre-operatively, intra-operatively and immediately after surgery.

Computer Systems↗
PubMed1991

[Computerized tomography immediately after surgery in the neurosurgical operating theater].

A TCT-300 scanner (manufactured by the Toshiba Co., Tokyo) has been installed in the operating room of Shinshu University Hospital since 1986. This neurosurgical operating CT scanner system was developed for obtaining intra- and postoperative CT images in the operating room. We have carried out immediate postoperative CT scanning in 206 cases: 170 were major and 36 were minor operations. A mobile CT scanner gantry has been used in 125 cases since June, 1988. We obtained CT images immediately after surgery on the digitalized operating table, the motion of which can be controlled as with the conventional CT scanner table. Immediate postoperative CT scans showed the extent of removed tumors or hematomas, position of the tip of ventricular or cisternal tubes, injury to the surrounding normal brain caused during the removal of lesions, and postoperative complications such as hemorrhage, brain swelling and surgical patties which had been inadvertently left in the wound. This CT scanner system in the operating room proved to be useful in the postoperative care of neurosurgical patients.

Adult↗
PubMed1991

[A case of divergence palsy associated with bilateral chronic subdural hematoma].

A surgical case of bilateral chronic subdural hematoma presenting with divergence palsy is reported. A 75-year-old female was admitted to hospital for investigation of 2-week history of diplopia. The initial neurological examination demonstrated no abnormal findings except Hess chart suggesting bilateral concomitant strabismus or paresis of lateral rectus on both eyes. Because of the homonymous diplopia disappeared when the object of fixation in brought closer and the patient showed no impairment of gaze movements and following movements, the patient was diagnosed as divergence palsy and referred to the Neurosurgical Service. The physical examination revealed a 75-year-old, alert, fully oriented with diplopia at distant gaze. A computerized tomographic (CT) scan showed bilateral subdural hematoma. Emergency burrhole evacuation was performed and total amount bilateral hematoma was 220ml. Diplopia disappeared postoperatively. Hess chart examined two months after the operation shows no impairment of divergence function. This is the first reported case of divergence palsy associated with bilateral chronic subdural hematoma in CT era.

Aged↗
PubMed1990

Digitally controlled neurosurgical operating table--technical note.

The authors describe a new, digitally controlled operating table for neurosurgery. The apparatus includes a digitally controlled motor for manipulating the table and a rotary encoder with a central processing unit, which calculates and displays the table's position. The table can be operated with any type of digitalized computer system and its position is monitored by the encoder unit in real time.

Neurosurgery↗
PubMed1990

[Adult moyamoya disease with a transcranial internal carotid-external carotid (EC-IC) anastomosis through burr holes].

A case of adult Moyamoya disease, with formation of a transcranial external carotid-internal carotid (EC-IC) anastomosis through burr holes which had been made previously. A 43-year-old male suffered sudden headache and vomiting. Neurological examination revealed mild consciousness disturbance and dysarthria. The computed tomography (CT) scans showed intraventricular hemorrhage, which was drained through burr holes bifrontally. The diagnosis of Moyamoya disease was subsequently made by cerebral angiography. A month later he was discharged with mild gait disturbance and mental retardation. Seven years later he suddenly complained of gait disturbance, dysarthria and sensory disturbance involving the right upper extremity. A CT scan revealed a small hemorrhage in the left putamen. Carotid angiograms disclosed transcranial EC-IC anastomosis through the burr holes which had been made previously. It is suggested that revascularization can be expected after opening burr holes and incising the dura matter for Moyamoya disease in adults as well as, possibly, in children.

Anastomosis, Surgical↗
PubMed1989

Bilateral subdural empyema due to Salmonella enteritidis in an infant.

A case is reported of an infant with bilateral subdural empyema due to Salmonella enteritidis. This Salmonella species is extremely uncommon as a pathogen in a focal infection in the central nervous system. Treatment by early surgical drainage, followed by systemic antibiotics and subdural irrigation, was successful. This is the first case reported of infantile subdural empyema due to S. enteritidis.

Drainage↗