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Biomedical subjects

Y Shintomi

Publications and source records attributed to Y Shintomi.

6 recordsLinked to original sources

Reconstruction of recurrent pressure sores using free flaps.

The authors describe two successful reconstructions of recurrent pressure sores with free fasciocutaneous flaps. In Case 1, a free lateral thigh flap pedicled on the first and third direct cutaneous branches of the deep femoral vessels was used to cover a large recurrent sacral pressure sore. The vascular pedicle was dissected to the deep femoral trunk proximally and anastomosed to the inferior gluteal vessels. In Case 2, a free medial plantar flap was transferred to a recurrent ischial pressure sore. The vascular pedicle was dissected to the posterior tibial vessels proximally. The long vascular pedicle of the flap was passed through the femoral subcutaneous tunnel, and end-to-side microvascular anastomoses were performed to the superficial femoral trunk without any vein grafts. The authors advocate the use of free tissue transfer for recurrent pressure sore reconstruction.

Humans

Pupillary abnormalities in schizophrenic patients during long-term administration of psychotropic drugs: dissociation between light and near vision reactions.

Pupillographic studies were made of the reactions to light and near vision in 12 schizophrenic patients under long-term administration of psychotropic drugs. The results showed a significant reduction in the light reaction, while the near vision reaction was preserved. The pupillographic study revealed not only reduction in amplitude of the light reaction but also changes in dynamic aspects of the reaction, i.e., prolonged latency time, shortened constriction time, and half redilatation time after the light stimulus. The mechanisms underlying the dissociation between light reaction and near vision reaction induced by long-term administration of psychotropic drugs are obscure, but both the peripheral and central actions of these drugs may be involved.

Adult

[Clinical experiences and experimental studies of false sensing with demand pacemakers (author's transl)].

False triggering with a ventricular triggered pacemaker and false inhibition with a ventricular inhibited pacemaker were observed in two patients with complete heart block. These arrhythmias were considered to be attributable to false sensing with a demand pacemaker. Both in vitro and in vivo studies were performed to elucidate the mechanism of these false sensings, and the false sensings were reproduced in a series of experiments. Loose contact of the tip of electrodes to myocardial tissue, refractory period, the distance between two electrodes, and the after potential and its dv/dt of pacemaker impulses are considered to affect the performance of demand pacers.

Adult