A client with an acute stroke must receive Alteplase 0.9 mg/kg (maximum dose 90 mg) over 60 minutes. The client weighs 220 pounds. How many mg should the client receive? (Round to the nearest tenth, do not use trailing zeros)

A. and record vital signs every 4 hours:
While vital signs are important, monitoring every 4 hours may not be frequent enough in an intensive care setting, especially for a client requiring mechanical ventilation. Vital signs, including blood pressure, heart rate, respiratory rate, and oxygen saturation, should be monitored more frequently (at least every hour) to detect changes in the patient's condition, particularly since positive pressure ventilation can significantly affect circulatory status.

B. Intake and output hourly:
In acute respiratory distress syndrome (ARDS), the client may require mechanical ventilation to support breathing. Positive pressure ventilation, while essential for improving oxygenation, can increase intrathoracic pressure, which may impair venous return to the heart, decreasing cardiac output. As a result, it is critical to monitor the fluid balance closely, as fluid overload can worsen the patient's condition and contribute to pulmonary edema or other complications. Hourly assessment of intake and output (I&O) helps the nurse monitor renal function, fluid status, and cardiac output. Maintaining a proper balance of fluids is crucial in managing ARDS and its associated complications.

C. Heart and lung sounds every shift:
A shift assessment of heart and lung sounds is useful but is not frequent enough to detect early changes in a client with decreased cardiac output or other complications related to mechanical ventilation. More frequent monitoring of lung sounds and heart function may be necessary, particularly in clients at risk of ventilator-associated complications like ventilator-associated pneumonia (VAP), pulmonary edema, or arrhythmias.

D. Level of consciousness every shift:
Monitoring level of consciousness is important, especially in clients with ARDS and mechanical ventilation, as changes in consciousness can indicate worsening hypoxia or hypercapnia. However, this assessment is less directly related to the immediate concern of decreased cardiac output, which can be more effectively managed through continuous monitoring of fluid status and vital signs rather than consciousness alone. Though consciousness should be monitored regularly, I&O hourly would be more crucial in this context for managing cardiac output.

Explanation of each option:

A. Respiratory rate of 10 breaths per minute:
A respiratory rate of 10 breaths per minute would be too slow in a patient with ARDS and hypoxemia. In response to hypoxemia, the body typically increases the respiratory rate to improve oxygenation. A respiratory rate of 10 breaths per minute would not be expected in this situation.

B. Respiratory rate of 32 breaths per minute: The arterial blood gas (ABG) results indicate respiratory alkalosis with hypoxemia, which is a common finding in patients with acute respiratory distress syndrome (ARDS). pH 7.59: This is alkalotic, meaning the body is experiencing respiratory alkalosis.

PaCO2 29 mmHg: The PaCO2 is low, indicating hyperventilation, which is a compensatory response to the alkalosis in an attempt to reduce carbon dioxide levels.

PaO2 55 mmHg: This is severely low, indicating hypoxemia (low oxygen levels in the blood), a hallmark of ARDS. HCO3 22 mEq/L: The bicarbonate is normal, suggesting that the metabolic component has not yet compensated for the respiratory alkalosis, or that it is in the early stages of compensation. Given these ABG results, the body is attempting to compensate for hypoxemia by increasing respiratory rate (tachypnea), which leads to hyperventilation and further reduction in PaCO2. Therefore, an expected assessment finding in this scenario would be a high respiratory rate (such as 32 breaths per minute), which is a compensatory response to hypoxemia.

C. Blood pressure 86/42 mmHg:
While hypotension can occur in severe cases of ARDS due to impaired oxygenation and circulation, it is not directly reflected by the ABG results provided. Hypoxemia and alkalosis would more likely lead to tachypnea and compensatory mechanisms like tachycardia, rather than significant hypotension unless there is another contributing factor, such as shock or sepsis. Therefore, hypotension is not the most expected finding based on these ABGs.

D. Heart rate of 45 beats per minute:
A heart rate of 45 beats per minute is bradycardic, which would be unusual in a patient with hypoxemia and respiratory alkalosis. Tachycardia is a more common compensatory response to hypoxia, as the heart works harder to improve oxygen delivery to tissues. A heart rate of 45 beats per minute would be more suggestive of a different underlying condition, such as vagal stimulation or cardiac conduction issues, but it is not the expected response in this case.