Biomedical subjects

A Takashi

Publications and source records attributed to A Takashi.

3 recordsLinked to original sources

PubMed1997

[Binocular functions in amblyopia and strabismus].

Regarding the changing trends in the concept, definition, etiological classification, and criteria for diagnosis of amblyopia, we reviewed a total of 4,693 cases of amblyopia seen during the past 37 years. The amblyopia was divided into four types: strabismic, anisometropic, ametropic, and form vision deprivative. There was a definite trend for the incidence to decrease and for the diagnosis to be made during earlier age in recent years. Although favorable recovery of visual acuity is obtained after treatment of amblyopia and strabismus, there are difficulties in obtaining good binocular functions in early-onset amblyopia and strabismus. This feature was evaluated in regard to motion perception asymmetry (MPA) and binocular depth from motion (DFM). Many cases of early-onset amblyopia and strabismus showed no disparity stereopsis, or position stereopsis, in spite of the presence of DFM. The MPA appeared to be closely related to early-onset esotropia regardless of age, while it disappeared and motion perception became symmetric 4 to 5 months after birth in normal infants. The DFM seemed to play an important role in maintaining good motor alignment for several years after surgery. I developed a checkerboard pattern stimulator in 1978. This method proved to be useful in developing binocular functions and motor alignment by applying simultaneous bifoveolar stimulation and anti-suppression. Extensive exposure to the stimulation was essential for therapeutic success.

Adolescent↗

PubMed1993

[Inferior oblique underaction].

We investigated the etiology and incidence of 100 cases of inferior oblique underaction. The difference between congenital and acquired underaction was discussed using Awaya's New Cyclo Tests (NCT) to examine cyclodeviation qualitatively and quantitatively. Inferior oblique underaction had been considered more frequently congenital than acquired. However, 63.0% of our cases were proved to be acquired. The congenital cases were Brown's syndrome and cases of unknown causes and the acquired cases were mainly of myasthenic or traumatic origin. The results of the NCT examination were as follows: incyclodeviation or no cyclodeviation was encountered in all cases of congenital underaction except for one postoperative case, but excyclodeviation rather than incyclodeviation occurred in cases of acquired underaction, which showed ocular torticollis to the side of the paretic eye. This result suggested that some other muscles were involved in acquired cases of seemingly isolated inferior oblique underaction, especially in myasthenia gravis. A diagnosis of myasthenia gravis should be considered first when an acquired inferior oblique underaction occurs with association of excyclodeviation demonstrated by the NCT as well as Cogan's lid twitch sign.

Adolescent↗

PubMed1989

Multimodal treatment of hepatocellular carcinoma.

Our multimodal treatment of hepatocellular carcinoma (HCC) has brought about a significant improvement of the survival rate. It consists of a combination of hepatectomy and transcatheter arterial embolization using lipiodol (L-TAE). In order to facilitate L-TAE, we have developed a special catheter with notches. A group of patients with HCC (124 cases), excluding cases with absolutely non-curative resections and operative deaths, were treated between December 1980 and November 1986. Each case was treated for more than 1 year after hepatectomy. The patients were divided into two groups: A, patients with a single tumor not larger than 5 cm, and B, cases with larger tumors or more than one lesion. Some patients in each group were treated with L-TAE after hepatectomy. In group A, there was no significant difference in survival between treated and non-treated cases. In group B, L-TAE gave a significantly better survival than no postoperative treatment.

Carcinoma, Hepatocellular↗