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Biomedical subjects

J Schramm

Publications and source records attributed to J Schramm.

At least 253 records · Page 14Linked to original sources
PubMed1981

[Intractable pain after lumbar intervertebral disc surgery (author's transl)].

A joint follow-up study of 3238 cases from 15 neurosurgical departments analyzed complications following lumbar disc surgery. One hundred cases of intractable pain were evaluated and correlated with the pre-, intra-, and postoperative findings of all patients with complications following lumbar disc surgery. The 100 cases with intractable pain are divided into 67 cases without and 33 cases with reoperation; these two groups are treated separately. In patients with intractable pain the following findings were more frequent and may be considered as risk factors: long preoperative period of complaints, discrepancy between sensory findings and level of operation, pronounced osteochondritic changes, extensive surgical intervention, and complaints without adequate neurologic findings. The poorest results after lumber disc surgery are discussed and compared with the literature.

Humans↗
PubMed1980

Angiographic aspects of extra-intracranial arterial bypass (EIAB) for cerebral arterial occlusive disease.

Fifty extra-intracranial arterial anastomoses were performed in 48 patients. The importance of a precise angiographic study in the pre- and post-operative period is emphasized. The different angiographic patterns of the anastomosis, its variation in time, the possible cause of failure, and the role played by the EIAB on the cerebral blood flow are described and discussed. The problems of extension and time of the postoperative angiographic examination, are also discussed.

Adult↗
PubMed1979

Negative exploration for lumbar disc prolapse--findings and possible causes.

32 cases of negative exploration in a joint follow-up series of 3,032 lumbar disc operations are described. Data from 15 hospitals were analyzed by means of questionnaires and computer-aided analysis. Detailed information is given about pre- as well as intraoperative findings. The causes of negative lumbar disc exploration can be divided into two groups. 1. Genuine misdiagnosis where other causes are responsible for the symptoms, and 2. poor technique where despite genuine disc prolapse no evidence was found at operation. The most important causes in the first group were osteochondrotic compression, distended epidural veins, and root tension. The results are less favourable in these patients than in the overall series but, compared to the other complicated courses, the results were markedly better. A review of the literature is given, the possible causes for negative explorations are discussed, and a directive is established for the surgical procedure in cases where an expected prolapse is not found at operation.

Diagnostic Errors↗
PubMed1979

Reversibility of changes in evoked spinal response following graded spinal cord compression.

The spinal evoked response obtained in cats at a site immediately rostral to the site of a graded spinal cord compression is described. They usually show an earlier decrease in amplitude than cortical SEP's and the appearance of a particular positive potential. The degree of reversibility after decompression is variable and is not correlated with histological damage.

Animals↗
PubMed1978

CT of the base of the skull.

A systematic study of the structures of the base of the skull was performed with CT. The findings in 141 pathological cases are described. The value and some limitations of this kind of investigation are described and discussed. A comparison with conventional tomography is made.

Brain↗
PubMed1975

[Endoscopy of the spinal canal (author's transl)].

The intraspinal endoscopy was carried out by means of a recently developed Selfoc-endoscope. The optical principle of the Selfoc-glass rod was described. The endoscopic observations in the preliminary experiment on dogs and in 6 clinical cases were reported. Our experiences showed the usefulness of Selfoc-endoscope for the clinical spinaloscopy.

Animals↗
PubMedDate not supplied

Effect of a subdural air collection on the sensory evoked potential during surgery in the sitting position.

Fifty-three cases with posterior fossa surgery were monitored using sensory evoked potentials (SEPs) and auditory evoked potentials (AEPs) simultaneously. Nine of them operated in the sitting position showed typical SEP changes during intracranial manipulations that were not attributable either to surgical or to anaesthetic handling. The SEP amplitude rapidly recovered when the patients were laid supine after operation. Skull X rays revealed intracranial air collections beneath the recording electrodes. The SEP changes were considered to be caused by conduction hindrance by the subdural air. In 1 patient, a way to overcome the air problem was demonstrated: bitemporal recording (T3-T4 montage) revealed little change in the SEP despite subdural air while the simultaneously recorded parieto-frontal record showed a drastic change.

Adolescent↗