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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 38 (1977), S. 89-99 
    ISSN: 0942-0940
    Keywords: Queckenstedt's test ; Body position ; Rheumatoid arthritis ; Atlantoaxial luxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Queckenstedt's test was carried out in 15 patients with marked rheumatoid atlanto-axial luxation. The test was done when moving the neck stepwise between flexion and extension, and with the patient in both lateral and sitting positions. The test performed in the sitting position was termed the functional Queckenstedt's test. The flexed position of the neck and the sitting body position, either alone or in combination, were factors contributing to a manometric block. Six more block phenomena were recorded in the sitting compared with the lateral position. As the sensitivity of the test seemed unaffected by body position, this indicated an increased atlanto-axial luxation in the sitting position. This applied to the neutral as well as the flexed position of the neck. There was a fairly good correlation between neurological symptoms and signs and the functional Queckenstedt's test. The use of the test as an aid supplementary to the clinical and roentgenological findings when deciding on the treatment of patients with rheumatoid atlanto-axial luxation is outlined.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0942-0940
    Keywords: Pressure transducer ; Disposable fluid chamber ; Dynamic performance ; Ventricular fluid pressure ; Spinal block test ; CSF absorptive capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A pressure transducer with a disposable, presterilized fluid chamber was developed to increase the safety margin when recording cerebrospinal fluid (CSF) pressure. With this system the fluid compartment is completely separated from the transducer proper, reducing electrical hazard and the risk of infection. The operational range is form — 20 mm Hg to 300 mm Hg with good static accuracy. The transducer with stopcocks has a flat frequency response of up to 75 Hz, showing that the two-part principle is compatible with good dynamic performance. The transducer system was easy to handle and well suited to the recording of ventricular fluid pressure, detection of spinal subarachnoid block, the investigation of CSF absorptive capacity, as well as blood pressure recording. When the transducer was connected to standard disposable stopcocks, needles, and tubing as for these recordings, the dynamic accuracy of the whole apparatus was satisfactory for analysis of the pulsatile wave-form. A total of 185 CSF pressure recordings was performed without complication.
    Type of Medium: Electronic Resource
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