Clinical Procedure
 
Aliases:
LP
Lumbar punctures

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May be performed to :

1. Obtain a CSF sample
2. Measure CSF pressure
3. Deliver medications into the intrathecal space

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A head CT is unable to reliably rule out hydrocephalus.

#apls

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Contraindicated in the patient who has signs consistent with raised intracranial pressure. These include altered concious state, focal neurological deficit, and recent seizures.

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Asking adults to "make yourself into a prawn" or "make yourself into a banana" seems to result in the right posture in many patients.

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Can be performed in either the lateral position or sitting up on the edge of the bed.

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To increase the space available to pass the spinal needle have the patient flex their lower back as much as possible.
Patients will often flex their thoracic spine rather than their lumbar spine and need to be guided.
Ask them to bring their knees up to their chest and drop their shoulders.

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