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The physician orders 500 mg PO of medication. The Medication is supplied as a suspension 125 mg/5mL. How many mL will the nurse administer for one dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation

The Correct Answer is ["20"]

Step-by-Step Solution:

Calculate the volume of medication to administer.

The available medication is 125 mg/5 mL.

We need to administer 500 mg.

To find the volume, we can set up a proportion:

125 mg / 5 mL = 500 mg / x mL

Cross-multiplying:

125x = 500 x 5

Solving for x:

x = (500 x 5) / 125 = 20 mL

Nursing Test Bank

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Correct Answer is C

Explanation

A. pH 7.33, PaCO2 35 mmHg, PaO2 78 mmHg, HCO3 20 mEq/L:
This answer choice indicates respiratory acidosis (pH < 7.35, low bicarbonate), but the goal in acute respiratory failure is not just to adjust the pH alone; the more immediate concern is correcting oxygenation. The PaO2 of 78 mmHg is below the normal range (80-100 mmHg), indicating hypoxemia that should be corrected first. The goal should be to improve PaO2 to acceptable levels (≥80 mmHg) and achieve adequate oxygen saturation. This ABG result does not fully align with the immediate goals of treatment.

B. Heart rate 80 and respiratory rate 20:
While normal vital signs like heart rate and respiratory rate are important, they are not the primary goal of treatment in acute respiratory failure. The focus during ventilator support is to improve oxygenation and ventilation rather than simply achieving normal heart and respiratory rates. In acute respiratory failure, abnormal heart and respiratory rates are often a result of hypoxia or hypercapnia (high CO2), so normalizing oxygenation and carbon dioxide levels is more critical initially.

C. O2 saturation of at least 94%:
The primary goal in acute respiratory failure is to maintain adequate oxygenation. In this context, the goal of ventilator support is to correct hypoxemia (low blood oxygen levels) and restore normal oxygen saturation. A target oxygen saturation of at least 94% is commonly considered appropriate for most patients in acute respiratory failure to ensure that tissues are receiving enough oxygen to prevent organ damage. This is a key aspect of managing respiratory failure and ensuring adequate tissue perfusion. Oxygen saturation below 90% is typically considered to indicate a severe level of hypoxemia, requiring prompt intervention.

D. Sodium 135 mg/dL and potassium 4.8 mg/dL:
While electrolyte levels are important to monitor in any critically ill patient, the main goal of treatment in acute respiratory failure is improving oxygenation and ventilation rather than focusing specifically on normalizing sodium or potassium levels. Correcting imbalances in electrolytes can be part of overall care, but it is not the primary objective in this situation. Oxygenation (as measured by PaO2 and O2 saturation) takes priority over correcting individual electrolytes.

A. pH 7.36, Pa02 98 mmHg, PaCO2 27 mmHg, HCO3 16 mEq/L, 02 sat 99% B. pH 7.47, Pa02 91 mmHg, PaCO2 52 mmHg. HCO3 30 mEg/L, 02 sat 96% C. pH 7.45, P302 86 mmHg, PaCO2 56 mmHg, HCO3 28 mEg/L, 02 sat 94% D. PH 7.32, PaO2 88 mmHg. PaCO2 54 mmHg. HCO3 29 mEq/L. 02 sat 94%

Correct Answer is A

Explanation

A. pH 7.36, PaO2 98 mmHg, PaCO2 27 mmHg, HCO3 16 mEq/L, O2 sat 99%: This set of ABG results is consistent with fully compensated metabolic acidosis. pH 7.36: This is within the normal range (7.35-7.45), indicating that compensation has occurred, as the pH has returned to normal levels. PaCO2 27 mmHg: The PaCO2 is low, suggesting that the respiratory system has compensated for the metabolic acidosis by increasing ventilation to excrete CO2, thus reducing the acid load. HCO3 16 mEq/L: The bicarbonate level is low, which is consistent with metabolic acidosis as the primary disturbance. The PaO2 and O2 saturation are normal, indicating adequate oxygenation. Since the pH is within the normal range and the PaCO2 and HCO3 levels reflect the compensatory changes needed to correct the metabolic acidosis, this is a case of fully compensated metabolic acidosis.

B. pH 7.47, PaO2 91 mmHg, PaCO2 52 mmHg, HCO3 30 mEq/L, O2 sat 96%:

This result indicates alkalosis rather than acidosis. The pH is alkalotic (7.47), and PaCO2 is elevated (52 mmHg), which suggests respiratory acidosis as the primary disturbance. The HCO3 is also high (30 mEq/L), which is consistent with metabolic compensation for respiratory acidosis, not for metabolic acidosis. Therefore, this is not consistent with fully compensated metabolic acidosis.

C. pH 7.45, PaO2 86 mmHg, PaCO2 56 mmHg, HCO3 28 mEq/L, O2 sat 94%:

The pH is normal, but PaCO2 is elevated (56 mmHg), indicating respiratory acidosis rather than metabolic acidosis. The HCO3 is also elevated (28 mEq/L), which is consistent with compensation for respiratory acidosis, not metabolic acidosis. This result suggests respiratory acidosis with compensated metabolic alkalosis rather than metabolic acidosis.

D. pH 7.32, PaO2 88 mmHg, PaCO2 54 mmHg, HCO3 29 mEq/L, O2 sat 94%:

The pH of 7.32 indicates acidosis, but it is not within the normal range, so this is not fully compensated. The PaCO2 is elevated (54 mmHg), indicating respiratory acidosis, and the HCO3 is elevated (29 mEq/L), showing metabolic compensation. However, since the pH has not yet returned to normal (it remains acidotic), this is an example of partially compensated respiratory acidosis, not fully compensated metabolic acidosis.

respiratory acidosis, not fully compensated metabolic acidosis.

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Arterial Blood Gases
pH	7.35-7.45
PaCO2	35-45mmHg
PaO2	80-100mmHg
HCO3-	22-26 mEq/L
O2 Saturation	>95%
Chemistry
BUN	8-21mg/dl
Creatinine	0.5-1.2mg/dl
Na	135-145 mEq/L
K	3.5-5.3 mEq/L
Cl	97-107 mEq/L
CO2	22-26 mEq/L
Ca	8.2-10.2 mg/dl
Glucose	65-99 mg/dl
Mg	1.7-2.2 mg/dl
PO4	2.5-4.5 mg/dl

The physician orders 500 mg PO of medication. The Medication is supplied as a suspension 125 mg/5mL. How many mL will the nurse administer for one dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

Correct Answer is A

Explanation

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