[Emphysematous cholecystitis].
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Acute Disease↗
Biomedical subjects
J Pyhtinen
Publications and source records attributed to J Pyhtinen.
Correlation of tibial nerve SEPs with the development of seizures in patients with supratentorial cerebral infarcts.
In 40 patients with supratentorial non-haemorrhagic cerebral infarct, the findings in the tibial nerve SEPs recorded during the acute stage correlated significantly with the development of seizures during a 1 year follow-up period. Abnormality in the side-to-side difference of the P40-N48 amplitude was the finding with the highest correlation with the development of seizures: 87.5% of the patients were classified correctly as to the risk of seizures.
Adult↗
A prospective 1 year follow-up study with somatosensory potentials evoked by stimulation of the posterior tibial nerve in patients with supratentorial cerebral infarction.
Somatosensory potentials evoked by stimulation of the posterior tibial nerve (tibial nerve SEPs) were studied in 40 patients with supratentorial non-haemorrhagic cerebral infarction and in 25 control subjects, SEPs were recorded twice in 39 patients and thrice in 35 patients. The first examination was carried out 4-19 days after the onset of the symptoms, the second examination 56-100 days after the stroke, and the third examination 348-393 days after the stroke. Increased side-to-side differences in the P57 and N75 peak latencies and absence of the P40 peak were the most frequent abnormal findings. The latency abnormalities were associated with involvement of the subcortical white matter of the rolandic region. The absence of the P40 peak was, in contrast, closely related to the extension of the infarcted area into the cortical gray matter of the rolandic region. When all SEP abnormalities were taken into account 55% of patients showed at least one abnormality in the tibial nerve SEP during the acute stage, 51% of patients had abnormal SEPs in the second examination and 43% of patients in the third examination. A nearly significant decrease was observed in the number of latency abnormalities, but the number of amplitude abnormalities, including absent responses, did not change during the 1 year follow-up period.
Adolescent↗
Computed tomography of the masticatory system--a review.
Computed tomography (CT) is a practical method for evaluating the masticatory system, since it shows the bone structures and soft tissues at the same time. It enables one to measure the densities and dimensions of various tissues. All parts of the temporomandibular joint (TMJ), condylar process, mandibular fossa and disc and the main masticatory muscles are well demonstrated by CT in projections which are not possible with other radiological methods.
Humans↗
Brain atrophy evaluated by computed tomography in independent and institutionalized hip fracture patients.
PURPOSE: To examine if there is an association between brain computed tomography (CT) findings and place of residence in a series of hip fracture patients. METHOD: The CT scans taken immediately after hip fracture of 215 patients (mean age 81.6 years) living in their own homes or otherwise independently (home-dwelling group) and 95 patients (mean age 82.5 years) permanently institutionalized (institutionalized group) were analysed. RESULTS: The institutionalized patients had significantly more cortical cerebral (frontal, p = 0.004; temporal, p = 0.007; parietal, p < 0.001) and central cerebral (third ventricle width, p < 0.001; frontal horn width, p < 0.001; midbody width, p < 0.001) atrophy than the home-dwelling ones. This was also true of atrophy in the white-matter (WM) area (p < 0.001). The institutionalized patients also had more atrophy of the cerebellar hemisphere (atrophy of the cerebellopontine angle cistern, p = 0.002, greater fourth ventricle width, p = 0.020). No significant difference was seen in the incidence of brain infarcts. CONCLUSIONS: Hip fracture patients living in institutions have more brain atrophy than those living independently. The brain atrophy may be one factor in the multiple mechanism underlying their institutional admission.
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