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2 de jul. de 2018 · A lumbar puncture is an invasive test designed to access the subarachnoid space in the lower spinal canal. The brain and spinal cord are covered by three layers of meninges- the dura, arachnoid, and pia mater (Figure 1). The subarachnoid space lies between the arachnoid and pia mater and contains a solution called cerebrospinal fluid (CSF).
4 de may. de 2024 · Lumbar puncture (spinal tap) is performed in your lower back, in the lumbar region. During lumbar puncture, a needle is inserted between two lumbar bones (vertebrae) to remove a sample of cerebrospinal fluid — the fluid that surrounds your brain and spinal cord to protect them from injury.
26 de mar. de 2024 · Landmarks. In adults, lumbar puncture is most commonly performed in the midline of the L3-L4 or L4-L5 interspace. Midline: identified by palpation of the spinous processes. L4 spinous process. Typically at the intersection of a line connecting the posterior iliac crests and a line connecting the spinous processes.
Contraindications for Lumbar Puncture. Absolute contraindications. Suspected infection (eg, cellulitis, abscess) at or near the site of needle insertion: If possible, use an alternate, uninfected site. This involves a suboccipital (cisternal) or cervical (C1-C2) ...
A lumbar puncture (LP) should only be performed after a thorough neurological examination and once all contraindications have been considered. Performing LP should never delay life-saving interventions such as antibiotics. A normal CT scan does not exclude raised intracranial pressure. Careful preparation, adequate analgesia and an experienced ...
1 de ene. de 2018 · For these reasons the following signs are contraindications for lumbar puncture: local skin sepsis. bleeding diatheses, e.g. anticoagulant therapy. signs of spinal cord compression. papilloedema or other signs of raised intracranial pressure. suspicion of intracranial or cord mass. congenital neurological lesions in lumbrosacral region.
Knowledge of anatomical landmarks and proper sterile technique are important when performing a lumbar puncture (LP). Absolute contraindications to LP are skin infection over puncture site and a brain mass causing increased intracranial pressure. Herniation is the most serious complication of a LP, whereas post-LP headache is most common. + + +
