Sustained Neutralizing Antibodies 6 Months Following Infection in 376 Japanese COVID-19 Survivors.

There is scarce evidence regarding the long-term persistence of neutralizing antibodies among coronavirus disease 2019 (COVID-19) survivors. This study determined neutralizing antibody titers (NT) and antibodies against spike protein (SP) or nucleocapsid protein (NP) antigens approximately 6 months after the diagnosis of COVID-19. COVID-19 survivors in Japan were recruited.

Contents of lecithin and choline in crude drugs.

The determination of lecithin and choline in crude drugs was established by a combination of high performance liquid chromatography (HPLC) with electrochemical detector (ECD) and enzyme reaction. Lecithin in crude drugs extracted with a mixture of chloroform-methanol (2:1) at room temperature was hydrolyzed by phospholipase D. The hydrolyzate was injected to HPLC, and choline was separated from impurities by reverse phase column.

[Three-dimensional analysis of arteriography in human posterior circulation (preliminary report)].

In earlier articles it was suggested that there is a relation between vertigo and the posterior circulation. This study was designed to ascertain the course of the branches of the vertebral artery and the basilar artery, as well as the principal blood vessels of the vestibular nucleus by using radiographic three-dimensional observation. We studied 27 human brains (17 males, 10 females) fixed with the arterial embalming method at the Department of Anatomy of Kawasaki Medical School.

[Neurosurgical management of dialyzed patients].

Cerebrovascular disease is a lethal complication for patients with renal failure because of the hemostatic disturbance and equivocality about management of the central nervous system. Appropriate management of the renal failure in neurosurgical patients was considered on the basis of experience. Hemodialysis (HD), which is the most common dialysis method, has a serious disadvantage: the elevation of intracranial pressure during dialysis due to the "disequilibrium syndrome.

The cerebral circulation in cases of carotid cavernous fistula. Findings of single photon emission computed tomography.

Ten patients with carotid cavernous fistula (CCF) were reviewed. Single photon emission computed tomography (SPECT) for regional cerebral blood flow (rCBF) study was performed in six patients with fast flow shunt. Five of these six patients with fast flow shunt angiographically demonstrated cortical venous drainage, and two of these patients suffered intracerebral hemorrhage.