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Biomedical subjects

J Haan

Publications and source records attributed to J Haan.

At least 145 records · Page 8Linked to original sources
PubMed1990

[Motor neurography: simultaneous recording using surface and needle electrodes. A comparative study of the proximal and distal latency together with the motor nerve conduction velocity].

The generally accepted interpretation that the application of surface and concentric needle electrodes for the recording of evoked muscle action potential in motor nerve neurography showed the same results has been reconsidered, especially because until now, over 20 years after the introduction of this neurophysiological method in routine clinical work, no exact statistically verified examinations have been done on this subject. Proximal and distal latency as well as motor nerve conduction velocity were determined in the following nerves in 100 subjects (71 healthy subjects and 29 patients): tibial, peroneal, ulnar, median. All neurographic parameters were obtained by means of simultaneous recording with surface and concentric needle electrodes and compared with one another. Concerning the ulnar nerve no statistically significant differences could be found. In the remaining three nerves, statistically significant differences could be detected for distal and proximal latency but not for motor nerve conduction velocity.

Electrodes↗
PubMed1989

[Dermatomyositis as a paraneoplastic syndrome. A case report].

A female patient with dermatomyositis with the typical clinical findings of this disease, corresponding histological muscular changes and neurological findings is described. Since in the further course of the disease, recurrent gastric carcinoma was diagnosed, this case again emphasizes the significance of dermatomyositis as a paraneoplastic syndrome, and the need for tumor screening when dermatomyositis is diagnosed in advanced adulthood.

Aged↗
PubMed1989

Anterior spinal artery syndrome in systemic lupus erythematosus.

We present a patient with systemic lupus erythematosus who developed an anterior spinal artery syndrome (ASAS) in association with livedo reticularis, leg ulcerations and thrombocytopenia. Low serum titres of anticardiolipin antibodies were detectable throughout the course of this disease. The patient recovered from the first episode of ASAS under corticosteroid treatment but remained paralytic after a second episode. Repeated magnetic resonance imaging of the spinal cord failed to show altered signal intensity.

Adolescent↗
PubMed1989

[Temporary lumbar external drainage in normal pressure hydrocephalus].

In a prospective study twenty-two patients diagnosed as suffering from idiopathic normal pressure hydrocephalus, were investigated using temporary external lumbar drainage. Five patients had to be excluded from the study because of complications of external lumbar or definite ventricular shunting. External drainage correctly predicted the outcome of shunting in all of the remaining seventeen patients. This technique appears to be a safe and valuable tool for predicting the outcome of definitive shunting procedures.

Aged↗
PubMed1989

[Acute postoperative psychosyndromes. A prospective study and multivariate analysis of risk factors].

The incidence of postoperative delirium was assessed in 92 patients on a general surgical intensive care unit. Postoperative delirium was diagnosed in 39 patients (42%). Most of the cases were diagnosed on the second postoperative day and the median duration was seven days. Ten patients with delirium (25%) had a lethal outcome, compared to a 13% mortality of the whole population. In univariate analysis the variables age, preoperative therapy for heart failure, respirator therapy, dobutamin therapy and lowest capillary pO2 on day one were significantly associated with later development of delirium, whereas preoperative peritonitis, and history of stroke or hypertension were only borderline significant. A predictive model with three parameters emerged from multiple logistic regression analysis: after correction for age (p = 0.001), respirator therapy (p = 0.020), and capillary pO2 on day one (p = 0.049) none of the remaining variables proved of additional significance. The statistical model yielded a predictive accuracy of 78%.

Adult↗
PubMed1988

Further aspects of MR-signal enhancements in stenosis of the cervical spinal canal. MRI-investigations in correlation to clinical and cerebrospinal fluid (CSF) findings.

The validity and anatomical basis of increased MR-signal intensity of the cord in cervical canal stenosis is discussed with respect to our own data of 32 patients (including results of clinical, CSF and other imaging technique findings) and previous reports. A shear-stress hypothesis with edematous tissue changes is favoured.

Humans↗
PubMed1988

Acute confusional migraine. Case report and review of literature.

The history of a girl is described who experienced two separate episodes of acute confusion with agitation. The first occurred at the age of four after a mild head injury, the second recently at the age of thirteen after prolonged physical effort. EEG's performed during both episodes showed marked diffuse slowing. Both clinical picture and EEG normalized rapidly. Clinical features and prompt recovery made the diagnosis 'acute confusional migraine' most likely. The relevant literature and importance of recognizing the syndrome are discussed

Adolescent↗