Betty, 52, presents with unexplained lymphadenopathy. Her biopsy tissue is sent for T- cell receptor (TCR) Gene Rearrangement testing. What is the main purpose of the TCR Gene Rearrangement test in Betty's diagnosis?

To identify bacterial infection

To confirm or rule out lymphoma

To evaluate for genetic disorders

To measure electrolyte imbalance

Answer and Explanation

The Correct Answer is B

A. TCR Gene Rearrangement testing is not used to identify bacterial infections.

B. TCR Gene Rearrangement testing is used to detect clonality in lymphoid cells, aiding in the diagnosis of lymphoproliferative disorders such as lymphoma.
C. This testing is not primarily used to evaluate genetic disorders.

D. TCR Gene Rearrangement testing does not measure electrolyte imbalance.

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Correct Answer is B

Explanation

A. A CO2 level lower than 20 mm Hg can cause cerebral vasoconstriction and ischemia.

B. The target CO2 level for patients with closed head injury is 20 to 25 mm Hg, which corresponds to a mild hypocapnia that reduces intracranial pressure and improves cerebral blood flow.
C. A CO2 level lower than 20 mm Hg can cause cerebral vasoconstriction and ischemia.
D. A CO2 level higher than 25 mm Hg can increase intracranial pressure and worsen brain edema.

A. It will enhance the diffusion of gases B. It will increase the diaphragmatic workload C. It will compromise the efficiency of ventilation D. It will improve pulmonary blood supply

Correct Answer is C

Explanation

A. Multiple rib fractures are unlikely to enhance gas diffusion; instead, they can impair ventilation by reducing the ability of the chest wall to expand.
B. Multiple rib fractures can indeed increase the workload of the diaphragm as it tries to compensate for the decreased ability of the chest wall to expand during breathing.

C. Multiple rib fractures can restrict chest wall movement, leading to compromised ventilation efficiency.
D. Multiple rib fractures wouldn't directly improve pulmonary blood supply; they can lead to pain and impaired lung function.

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Betty, 52, presents with unexplained lymphadenopathy. Her biopsy tissue is sent for T- cell receptor (TCR) Gene Rearrangement testing. What is the main purpose of the TCR Gene Rearrangement test in Betty's diagnosis?

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Naxlex Comprehensive Predictor Exams

Maria, 21, with a closed head injury is unconscious and on mechanical ventilation. Her ABG results show a CO2 level of 35 mm Hg. What should be the target CO2 level to optimize brain perfusion?

Correct Answer is B

Explanation

George, a 15-year-old man, is brought to the ESL with multiple rib fractures following a motor vehicle accident. How could this injury affect his respiratory system?

Correct Answer is C

Explanation

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