Why can you do a lumbar puncture with increased intracranial pressure?

Why can you do a lumbar puncture with increased intracranial pressure?

While some patients with CT evidence of increased ICP have undergone LP without herniation, CT findings of increased ICP place patients at a dramatically increased risk for herniation if an LP is performed. Therefore, LP should be avoided when any signs of increased ICP are seen on CT.

What is the risk of doing a lumbar puncture on a patient with intracranial hypertension?

Avoiding cerebral herniation – Cerebral herniation is a rare, but usually fatal, complication of an LP performed in an individual with increased intracranial pressure (ICP).

Does lumbar puncture reduce intracranial pressure?

regular lumbar punctures to remove excess fluid from your spine and help reduce the pressure on your brain.

What are the symptoms of stage 1 intracranial hypertension?

The signs and symptoms most frequently associated with intracranial hypertension include headache, nausea, vomiting, papilledema, unilateral pupillary dilatation, and oculomotor or abducens nerve palsies. Changes in consciousness and irregular ventilatory patterns indicate advanced stages of intracranial hypertension.

What are contraindication for lumbar puncture?

Absolute contraindications for performing a LP include infected skin over the puncture site, increased intracranial pressure (ICP) from any space-occupying lesion (mass, abscess), and trauma or mass to lumbar vertebrae.

When should you not have a lumbar puncture?

Avoid lumbar puncture in patients in whom the disease process has progressed to the neurologic findings associated with impending cerebral herniation (ie, deteriorating level of consciousness and brainstem signs that include pupillary changes, posturing, irregular respirations, and very recent seizure)

When should you avoid a lumbar puncture?

When should you not perform a lumbar puncture?

Do not perform a lumbar puncture without consultant instruction if any of the following contraindications are present: signs suggesting raised intracranial pressure or reduced or fluctuating level of. consciousness (Glasgow Coma Scale score less than 9 or a drop of 3 points or more) relative bradycardia and …

Can intracranial hypertension be cured?

For the longer term, weight loss is necessary for treatment of IIH that is brought on by obesity. A number of investigators have shown that weight loss is a cure for patients with IIH due to obesity. In general, it takes weight loss of between 10 to 20% of your body weight to cure IIH.

How is intracranial hypertension diagnosed?

Diagnosing idiopathic intracranial hypertension Diagnosis of IIH is based on history, physical examination, imaging tests and lumbar puncture. Neuroimaging, usually with computed tomography (CT/CAT) or magnetic resonance imaging (MRI), is used to rule out any tumor or disease.

How serious is intracranial hypertension?

ICP is a dangerous condition. It is an emergency and requires immediate medical attention. Increased intracranial pressure from bleeding in the brain, a tumor, stroke, aneurysm, high blood pressure, brain infection, etc. can cause a headache and other symptoms.

What are the possible complications of a lumbar puncture?

What are possible complications of lumbar puncture (LP)?

  • Post–spinal puncture headache.
  • Bloody tap.
  • Dry tap.
  • Infection.
  • Hemorrhage.
  • Dysesthesia.
  • Post–dural puncture cerebral herniation.

¿Qué es la hipertensión intracraneal?

Hipertensión intracraneal debida a una lesión ocupante de espacio dentro del cráneo, a la obstrucción del flujo de salida del líquido cefalorraquídeo (p. ej., debida a una estenosis del acueducto o una malfomación de Chiari I) o al bloqueo del líquido cefalorraquídeo en la médula espinal (p. ej., debida a una compresión por un tumor) .

¿Qué es la punción lumbar?

Punción lumbar. La punción lumbar se usa con los siguientes objetivos: Evaluar la presión intracraneal y la composición del líquido cefalorraquídeo (véase tabla Alteraciones del líquido cefalorraquídeo en distintos trastornos) Reducción terapéutica de la presión intracraneal (p. ej., hipertensión intracraneal idiopática ).

¿Qué pasa si aumenta la presión intracraneal?

El aumento de la presión intracraneal puede causar hinchazón del nervio óptico y conducir a la pérdida de la visión. Los medicamentos a menudo pueden reducir esta presión y el dolor de cabeza, pero en algunos casos, la cirugía es necesaria.

¿Cuál es el riesgo de sangrado después de una punción lumbar?

Existe riesgo de sangrado (hematoma epidural o hemorragia subaracnoidea) luego de la punción lumbar. En raros casos, luego de una punción lumbar puede ocurrir la compresión o hernia del tronco cerebral debido a la presión intracraneal elevada y a la presencia de un tumor cerebral u otra lesión.