Cerebral vascular accident - Nursing Case Study
Pathophysiology
• Primary mechanism: Ischemic stroke results from an obstruction in cerebral blood flow, often due to a thrombus or embolus, leading to brain tissue ischemia and subsequent infarction. This reduces oxygen and nutrient delivery, causing cell death and neurological deficits.
• Secondary mechanism: Hemorrhagic stroke occurs when a blood vessel ruptures, causing bleeding into or around the brain. This increases intracranial pressure, reduces cerebral perfusion, and damages brain tissue through direct pressure and toxic effects of blood components.
• Key complication: Both ischemic and hemorrhagic strokes can lead to cerebral edema, which exacerbates brain injury by further increasing intracranial pressure, potentially leading to herniation and further loss of neurological function.
Patient Profile
Demographics:
62-year-old male, retired construction worker
History:
• Key past medical history: Hypertension, Type 2 Diabetes Mellitus, Hyperlipidemia
• Current medications: Lisinopril, Metformin, Atorvastatin, Aspirin
• Allergies: Penicillin
Current Presentation:
• Chief complaint: Sudden weakness on the right side of the body
• Key symptoms: Slurred speech, facial droop on the right side, headache, difficulty walking
• Vital signs: Blood pressure 180/95 mmHg, heart rate 98 bpm, respiratory rate 22 breaths per minute, temperature 37.2°C, oxygen saturation 94% on room air
Section 1
As the medical team continues to monitor the 62-year-old male patient, they note a change in his clinical status that suggests the development of new complications. Approximately 24 hours post-admission, the patient begins to exhibit increased confusion and agitation. Repeat vital signs reveal a blood pressure of 190/100 mmHg, heart rate of 105 bpm, and oxygen saturation has decreased to 91% on room air. Neurological assessment shows a worsening of the right-sided weakness, now involving the upper extremity more markedly, and the patient is increasingly difficult to rouse.
A CT scan of the head is ordered urgently and reveals the presence of significant cerebral edema with midline shift, indicative of increased intracranial pressure. This finding correlates with his clinical deterioration. The edema is likely exacerbating the ischemic injury, compressing surrounding brain tissue and compromising cerebral perfusion further. This situation requires immediate intervention to prevent further neurological decline and potential herniation.
The medical team initiates several interventions to address the rising intracranial pressure. Osmotic diuretics such as mannitol are administered to help reduce cerebral edema, and the patient is started on a carefully monitored regimen of anti-hypertensive medications to control his blood pressure and limit further vascular injury. Additionally, the patient is placed on supplemental oxygen to improve his oxygen saturation levels. These interventions are critical in stabilizing the patient's condition and preventing further complications, while the team plans for potential surgical consultation if medical management proves insufficient.
Section 2
The medical team closely monitors the patient's response to the interventions aimed at managing his increased intracranial pressure and hypertension. Over the next several hours, there is a modest improvement in the patient's oxygen saturation, rising to 94% with supplemental oxygen. His blood pressure shows a slight decrease, now reading 175/95 mmHg, indicating a partial response to the anti-hypertensive regimen. However, the neurological status remains concerning; the patient is still difficult to rouse, with persistent confusion and right-sided weakness which now includes diminished motor response in the right arm.
In light of these findings, a comprehensive metabolic panel is drawn to assess for any electrolyte imbalances that might contribute to his altered mental status and overall clinical picture. The laboratory results reveal hyponatremia, with a serum sodium level of 128 mEq/L. This condition could be secondary to the administration of mannitol or may suggest syndrome of inappropriate antidiuretic hormone secretion (SIADH), potentially exacerbating cerebral edema.
The recognition of hyponatremia prompts the medical team to adjust the patient's fluid management, cautiously correcting the sodium imbalance to avoid rapid shifts that could lead to central pontine myelinolysis. The team also re-evaluates the patient's medication regimen to mitigate any further risk of electrolyte disturbances. With these adjustments, the team hopes to stabilize the patient's condition, reduce intracranial pressure more effectively, and prepare for the possibility of neurosurgical intervention if his neurological status does not improve. The next steps will involve continuous monitoring and frequent reassessment to guide further treatment decisions.
Section 3
As the medical team continues to monitor the patient, a change in his status becomes evident. Despite the cautious correction of hyponatremia, his neurological status remains unchanged, with persistent confusion and worsening right-sided weakness. The patient's Glasgow Coma Scale (GCS) score remains low, indicating a need for further evaluation. During a routine neurological assessment, the nurse notes decreased responsiveness to painful stimuli on the right side, and the patient now exhibits slurred speech and facial drooping on the right side, suggesting a possible expansion of the cerebral insult.
In response to these concerning findings, an urgent repeat CT scan of the brain is performed to assess for any progression of cerebral edema or new ischemic changes. The imaging reveals an extension of the infarcted area in the left hemisphere, with increased midline shift, indicating worsening cerebral edema and mass effect. This development underscores the need for immediate intervention to prevent further neurological deterioration.
The medical team, recognizing the potential for increased intracranial pressure and the risk of herniation, considers more aggressive management strategies. The discussion includes potential surgical options, such as decompressive craniectomy, to alleviate pressure and protect remaining brain tissue. As the team deliberates, they continue to optimize medical management, adjusting the patient's head elevation, considering osmotic therapy, and ensuring meticulous control of blood pressure to prevent further ischemic damage. The unfolding scenario demands vigilant monitoring and rapid decision-making to navigate the patient's complex and evolving condition.
Section 4
As the medical team moves forward with their plan, they decide to initiate osmotic therapy with mannitol to reduce cerebral edema and lower intracranial pressure. The patient is also positioned with the head of the bed elevated at 30 degrees to optimize venous drainage and minimize further swelling. Following the administration of mannitol, the nursing staff closely monitors the patient's vital signs, fluid balance, and neurological status. The patient's blood pressure is meticulously controlled, maintaining systolic levels between 140-160 mmHg to ensure adequate cerebral perfusion without exacerbating edema.
Over the next several hours, the patient exhibits a slight improvement in his level of consciousness, with a GCS score rising from 8 to 10. He becomes more responsive to verbal stimuli, although confusion persists. The right-sided weakness remains pronounced, and his slurred speech and facial drooping show no signs of improvement. Despite these challenges, the stabilization of his condition suggests a positive initial response to the osmotic therapy. Laboratory results show a gradual correction of serum sodium levels, indicating effective management of his hyponatremia without compromising neurological recovery.
However, the team remains vigilant for potential complications. A follow-up CT scan is planned to evaluate the effectiveness of the interventions and to reassess the extent of cerebral edema and midline shift. The possibility of surgical intervention, such as decompressive craniectomy, remains on the table should the patient's condition deteriorate or fail to improve further. The healthcare team is prepared to adjust the treatment plan as necessary, emphasizing the need for continuous assessment and coordinated care in managing this critical phase of the patient's recovery.
Section 5
As the medical team continues to monitor the patient, a change in his status becomes apparent. Approximately 12 hours after the administration of mannitol, the patient begins to exhibit signs of worsening neurological function. His Glasgow Coma Scale (GCS) score drops back to 8, indicating a decrease in his level of consciousness. The nursing staff also notes a new onset of bradycardia, with heart rates dipping to 50-55 beats per minute, and a slight increase in systolic blood pressure to 165 mmHg. These changes raise concerns about potential complications, prompting an urgent reassessment of the patient's condition.
A follow-up CT scan is performed, revealing a persistent midline shift with no significant reduction in cerebral edema. Furthermore, the scan indicates the presence of a small, developing hemorrhagic transformation at the site of the ischemic stroke. This finding suggests that despite the initial positive response to osmotic therapy, the patient's condition is at risk of further deterioration. The healthcare team must now reconsider the treatment strategy, with an increased focus on preventing further hemorrhagic conversion and managing the intracranial pressure more aggressively.
In response to these developments, the team decides to initiate a cautious titration of hypertonic saline to further address the cerebral edema and stabilize the patient's sodium levels, while closely monitoring for electrolyte imbalances. The prospect of surgical intervention, such as a decompressive craniectomy, is revisited with the neurosurgical team standing by for potential escalation of care. The nursing staff intensifies their vigilance in monitoring neurological status, vital signs, and laboratory parameters, understanding that timely detection of any further complications is crucial to optimizing the patient's outcomes during this critical phase of treatment.