Mrs. Ramirez is a 61 year old female who presents to the Emergency Department (ED) complaining of a headache and fatigue. Her temperature is 102.6°F and nuchal rigidity is noted when trying to flex Mrs. Ramirez’s neck. The charge nurse suspects she has meningitis and immediately places her in a closed room under droplet precautions.
Critical Thinking Check
Bloom's Taxonomy: Application
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Full set Vital Signs, including Temp, HR, BP, RR, SpO2, and pain
Full PQRST / OLDCARTS assessment regarding pain
Detailed neuro exam including LOC and pupils
The provider performs a lumbar puncture which shows elevated white blood cell count and a decreased glucose level. Mrs. Ramirez’s temperature has increased to 103.5°F. She is oriented x 3, but drowsy. The provider starts her on IV antibiotics as ordered and initiates q1h neuro checks.
Critical Thinking Check
Bloom's Taxonomy: Comprehension
What should be included in your routine q1h neuro exam?
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LOC
Glasgow Coma Scale
Pupils
Strength
Critical Thinking Check
Bloom's Taxonomy: Application
What additional adjunct assessments could be included in your neuro exam?
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Babinski Reflex
Nuchal Rigidity
Ataxia and coordination tests
Cough, Gag, and Corneal reflexes
Mrs. Ramirez is admitted to the ICU. She receives 1g Acetaminophen PO for her fever. One hour after admission to the ICU, you go to reassess Mrs. Ramirez’s neuro status. You find that she is somnolent, oriented x 1, and her pupils are unequal (right larger than left) but reactive to light.
Critical Thinking Check
Bloom's Taxonomy: Application
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Notify the provider immediately. This is an acute neuro change and should be taken very seriously.
Critical Thinking Check
Bloom's Taxonomy: Analysis
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The patient will likely need a STAT CT scan to evaluate any changes in her brain
If there is edema, the provider may order mannitol
If there is hydrocephalus, the provider may order to place an EVD.
The CT scan shows a large amount of edema on the right side of Mrs. Ramirez’s brain, as well as some hydrocephalus. The ICU Provider determines Mrs. Ramirez will need an External Ventricular Drain (EVD). The EVD is inserted successfully and shows an ICP of 17 mmHg. The patient’s vital signs are as follows:
BP122/52MAP75
HR78RR32
SpO296% Room AirTemp102.9°F
Critical Thinking Check
Bloom's Taxonomy: Application
Calculate the patient’s Cerebral Perfusion Pressure (CPP). Is it sufficient? What is the goal? What is the risk if the CPP falls too low?
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The patient’s CPP is 58 mmHg.
This is not sufficient – the goal is to have a CPP > 70 mmHg
If the CPP falls too low, the brain is not being perfused adequately, which could lead to ischemia and brain cell death.
Critical Thinking Check
Bloom's Taxonomy: Analysis
What interventions could be requested from the provider to keep the patient safe??
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If the patient is intubated, can collaborate with provider and RT to hyperventilate the patient for permissive hypocapnia
Keep HOB 30-45 degrees
Minimize stimulation, keep patient calm
Avoid valsalva maneuvers
Increase MAP – request medications or IV fluids from the provider
Minimize ICP
The EVD is open to drain at 10 cmH2O (7-8 mmHg). It is draining a moderate amount of serosanguineous fluid. Mrs. Ramirez is confused and begins to get agitated. She is placed in bilateral soft wrist restraints for safety and to prevent her from pulling out the EVD. She continues to pull at the restraints and is thrashing in bed. She is drooling excessively and doesn’t seem to be able to swallow effectively as she keeps coughing. Her ICP is reading 14 mmHg. Her BP is 92/44, MAP 60.
Critical Thinking Check
Bloom's Taxonomy: Application
Calculate the patient’s CPP. Is it sufficient? Explain.
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The patient’s CPP is 46 mmHg. This is definitely not sufficient since the goal is a CPP > 70 mmHg. For some reason the patient’s MAP is dropping – this may be due to the infection or sepsis/septic shock. She is also quite agitated which is causing her ICP to remain high, despite having the drain in place.
Her MAP should be increased or something should be done about her agitation.
Critical Thinking Check
Bloom's Taxonomy: Analysis
What interventions could be requested from the provider to keep the patient safe?
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The patient might need to be intubated and sedated in order to keep them calm.
It’s also possible to just administer a sedative or antipsychotic, but there is evidence that she may not be protecting her airway. Intubation for airway protection appears to be the best option at this time.
Mrs. Ramirez is intubated and sedated in order to minimize her ICP and keep her safe. She continues to receive IV antibiotics and corticosteroids. Four days later she is able to be weaned safely from sedation and can be extubated. She is calm and oriented x 3. Her ICP is reading between 5-8 mmHg. Her repeat CT scan shows the edema has decreased, so the provider removes the EVD.
Critical Thinking Check
Bloom's Taxonomy: Analysis
What assessment findings would indicate increasing ICP after removal of the EVD?