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  2. Queckenstedt's maneuver - Wikipedia

    en.wikipedia.org/wiki/Queckenstedt's_maneuver

    Given normal anatomy, the intracranial pressure will be reflected as a rapidly rising pressure measured from the lumbar needle, within 10–12 seconds. If there is a stenosis in the spine, there will be a damped, delayed response in the lumbar pressure, thus a positive Queckenstedt's maneuver.

  3. Lumbar puncture - Wikipedia

    en.wikipedia.org/wiki/Lumbar_puncture

    Some practitioners prefer it for lumbar puncture in obese patients, where lying on their side would cause a scoliosis and unreliable anatomical landmarks. However, opening pressures are notoriously unreliable when measured in the seated position. Therefore, patients will ideally lie on their side if practitioners need to measure opening pressure.

  4. Intracranial pressure - Wikipedia

    en.wikipedia.org/wiki/Intracranial_pressure

    Intracranial pressure (ICP) is the pressure exerted by fluids such as cerebrospinal fluid (CSF) inside the skull and on the brain tissue. ICP is measured in millimeters of mercury and at rest, is normally 7–15 mmHg for a supine adult. This equals to 9–20 cmH 2 O, which is a common scale used in lumbar punctures. [1]

  5. CSF tap test - Wikipedia

    en.wikipedia.org/wiki/CSF_tap_test

    The CSF tap test, sometimes lumbar tap test or Miller Fisher Test, is a medical test that is used to decide whether shunting of cerebrospinal fluid (CSF) would be helpful in a patient with suspected normal pressure hydrocephalus (NPH).

  6. Cerebrospinal fluid leak - Wikipedia

    en.wikipedia.org/wiki/Cerebrospinal_fluid_leak

    The opening fluid pressure in the spinal canal is obtained by performing a lumbar puncture, also known as a spinal tap. Once the pressure is measured, a radiocontrast agent is injected into the spinal fluid. The contrast then diffuses out through the dura sac before leaking through dural holes.

  7. Idiopathic intracranial hypertension - Wikipedia

    en.wikipedia.org/wiki/Idiopathic_intracranial...

    Lumbar puncture is performed to measure the opening pressure, as well as to obtain cerebrospinal fluid (CSF) to exclude alternative diagnoses. If the opening pressure is increased, CSF may be removed for transient relief (see below). [8] The CSF is examined for abnormal cells, infections, antibody levels, the glucose level, and protein levels.

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  9. File:Diagram showing how you have a lumbar puncture CRUK 157 ...

    en.wikipedia.org/wiki/File:Diagram_showing_how...

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