[Relation of the lesion site in the human thalamus to the thalamic syndrome and the effect of thalamotomy].
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Brain Diseases↗
Biomedical subjects
S Kadoya
Publications and source records attributed to S Kadoya.
Evaluation of cerebrospinal fluid flow through a Pudenz 12 mm or a standard Rickham reservoir: phantom experiments.
We have investigated the assessment of fluid flow through a Pudenz and a Rickham shunt using radioactive tracer. Experimentally, the radioactivity clearance curve obtained, using either shunt, is defined by two exponents. The relationship between flow-rate (F) and clearance half-time (T1/2) of the first component is identical with the clearance formula (formula: see text) or log10(F) =-LOG10(T1/2) + LOG100.693V using the physical volume. The value of the second component in a Pudenz 12 mm and a standard Rickman reservoir is log10(F) = -1.3LOG10(T1/2) + 0.087 and log 10(F) =-1.8log10(T1/2) + 0.019 respectively. In clinical practice, the first component may not be recorded adequately because the interval between appearance of the first and second components is very short. To calculate the CSF flow, we recommend referring to the line of "radioactivity clearance half-time and flow-rate" of the second component instead of the calculation based on clearance formula using a physical volume.
Cerebrospinal Fluid↗
A microsurgical anterior osteophytectomy for cervical spondylotic myelopathy.
Cervical spondylotic myelopathy was treated by a microsurgical anterior approach removing osteophytes completely. Follow-up results of 43 patients showed that 39 patients (91%) exhibited overall improvements of either 1, 2, or 3 grades on Nurick's grading. Four (9%) remained unchanged. Even severely affected myelopathic patients exhibited neurologic recovery. Cases that also had narrow cervical canals were treated by the same anterior osteophytectomy, and they showed similar responses. Six out of ten patients who had osteophytectomies without fusion developed neck and arm pain postoperatively, although the presence or absence of an interbody fusion did not affect the postoperative recovery from myelopathy.
Adult↗
Factors affecting the prognosis in thalamic hemorrhage.
The present study deals with the factors affecting the prognosis in the acute stage of 29 cases with hypertensive thalamic hemorrhage diagnosed by CT scan. It was thought that the following factors were significantly related to the outcome of the patients who were unable to lead daily life, remained in vegetative state or died: (1) consciousness level was below 10 in the so-called 3-3-9 formula, (2) bilateral Babinski's signs were observed, (3) localization of the hematoma was all the thalamic nuclei type, (4) hematoma volume was above 10 ml, (5) the maximum dimension of hematoma was over 30 or 35 mm, maximum width over 30 mm, maximum length over 25 mm and maximum height over 30 or 40 mm, and (6) the ventricles were dilatated. The prognosis had no significant relationship with the age of the patients, the side of the hematoma, the presence or the absence of ventricular penetration of the hematoma, or the existence of midline shift. We believe that in the acute stage of hypertensive thalamic hemorrhage, the prognosis can be forecasted by neurological findings, accurate calculation of the hematoma volume and size, localization of the hematoma and presence or absence of ventricular dilatation as determined by CT scan.
Activities of Daily Living↗