Diagnostic tests

 

92 y/o African American male is brought to the Emergency Department by his daughter. The patient has slurred speech. His blood pressure is 210/100.

To prepare:
• By Day 1 of this week, your Instructor will assign a patient profile for this Assignment. Note: Please see the Course Announcements section of the classroom for your patient profile Assignment.
• Review this week’s Learning Resources.
• Review the details of the patient case study.
• Consider what physical exams and diagnostic tests would be most appropriate to gather more information about the patient’s condition.
• Reflect on how the results would be used to make a diagnosis.
• Identify three to five (3–5) possible conditions that may be considered in a differential diagnosis for the patient.
Assignment: Diagnostic Reasoning
Include the following:
• Identify the patient’s chief complaint.
• Identify what physical exams and diagnostic tests would be most appropriate to gather more information about the patient’s condition. Be specific and explain your reasoning.
• Explain how the results would be used to make a diagnosis.
• Identify three to five (3–5) possible conditions that may be considered in a differential diagnosis for the patient. Explain your thinking.

 

Sample Solution

Patient: 92-year-old African American Male with Slurred Speech and High Blood Pressure

Chief Complaint: Slurred speech

Physical Exams:

  • Neurological Exam: This is crucial to assess the patient’s level of consciousness, orientation, speech clarity and fluency, coordination, and presence of weakness or numbness. Slurred speech can indicate issues in the brain regions responsible for speech production or nerve damage affecting the muscles involved in speaking.
  • Vital Signs: Blood pressure (already noted as 210/100 mmHg) will be monitored continuously. Heart rate, respiratory rate, oxygen saturation, and temperature will also be taken to assess overall health and identify potential complications.
  • Head and Neck Exam: This exam will check for signs of trauma, masses, or tenderness that could be related to the slurred speech.

Diagnostic Tests:

  • Blood Tests: Complete Blood Count (CBC) to assess for infections or anemia, Basic Metabolic Panel (BMP) to evaluate electrolytes, kidney function, and blood sugar levels, Coagulation studies to assess bleeding risk, and Troponin levels to rule out cardiac ischemia (lack of oxygen to the heart muscle).
  • CT Scan of the Head: This imaging test can identify potential causes of the slurred speech like stroke, brain hemorrhage, or tumors.
  • Electrocardiogram (ECG): This test checks for abnormal heart rhythms that could be related to the high blood pressure or other underlying conditions.

How Results would be used for Diagnosis:

  • Neurological Exam: Findings like weakness, incoordination, or specific speech patterns can point to the location and severity of a potential stroke or neurological issue.
  • Blood Tests: Elevated white blood cells may indicate infection, abnormal electrolytes can affect brain function, and high blood sugar can contribute to neurological problems.
  • CT Scan: The scan will reveal any bleeding, blood clots, or abnormalities in the brain structure that could explain the slurred speech.
  • ECG: An irregular heartbeat could be a sign of a heart attack or other cardiac issues contributing to the patient’s condition.

Differential Diagnosis:

  1. Stroke: This is a top possibility given the patient’s age, slurred speech, and potentially high blood pressure. A stroke occurs when blood flow to part of the brain is interrupted, leading to damage and potential neurological deficits. Slurred speech is a common symptom depending on the affected brain region.

  2. Transient Ischemic Attack (TIA): Also known as a “mini-stroke,” a TIA is a temporary blockage of blood flow to the brain that resolves quickly. Symptoms like slurred speech can occur but typically disappear within 24 hours.

  3. Brain Tumor: While less likely, a brain tumor can put pressure on areas responsible for speech production, leading to slurred speech.

  4. Metabolic Disorders: Electrolyte imbalances, hypoglycemia (low blood sugar), or hyperglycemia (high blood sugar) can affect brain function and cause speech difficulties.

  5. Medication Side Effects: Certain medications can cause slurred speech as a side effect. A review of the patient’s medications is necessary to rule this out.

Additional Considerations:

  • The patient’s age increases the risk of stroke and other neurological conditions.
  • High blood pressure (hypertension) is a significant risk factor for stroke and can damage blood vessels in the brain.
  • It’s important to gather information about the patient’s medical history, medications, and recent activities to further refine the differential diagnosis.

By performing a comprehensive physical exam, ordering appropriate diagnostic tests, and considering the patient’s history, the healthcare team can arrive at an accurate diagnosis and develop the most effective treatment plan.

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