The nurse is caring for a patient following insertion of a left subclavian central venous catheter (CVC). Which action by the nurse best reduces the risk of catheter-related bloodstream infection (CRBSI)?

Review daily the necessity of the central venous catheter.

Maintain a pressure of 300 mm Hg on the flush bag.

Cleanse the insertion site daily with isopropyl alcohol.

Change the pressurized tubing system and flush bag daily.

Answer and Explanation

The Correct Answer is A

A. Review daily the necessity of the central venous catheter: One of the most effective strategies to reduce the risk of catheter-related bloodstream infections is to remove the central line as soon as it is no longer needed. Daily evaluation of necessity prevents prolonged catheter use, which significantly increases infection risk. Removing the source of potential infection is the ultimate preventative action.

B. Maintain a pressure of 300 mm Hg on the flush bag: While maintaining appropriate flush pressure is important for catheter patency and preventing blood clots, it does not play a direct role in preventing bloodstream infections. This action is more related to ensuring adequate line function rather than infection control.

C. Cleanse the insertion site daily with isopropyl alcohol: Current guidelines recommend using chlorhexidine-based solutions rather than isopropyl alcohol for skin antisepsis due to better antimicrobial efficacy. Daily site care is important, but the choice of antiseptic is critical in reducing infection risk.

D. Change the pressurized tubing system and flush bag daily: Tubing and flush systems should be changed typically every 72–96 hours unless contamination is suspected. Changing them daily is not recommended and does not provide added protection against infection it may even increase risk with unnecessary manipulation.

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Correct Answer is C

Explanation

A. Atria is taking longer to depolarize and contract: This would be indicated by a prolonged or abnormal P wave, not a normal PR interval. The rhythm strip shows clearly visible, normal-appearing P waves followed by QRS complexes, ruling this out as the correct interpretation.

B. Conduction time is slowed from the SA node to the ventricles: A slowed conduction time would result in a PR interval longer than 0.20 seconds, characteristic of first-degree AV block. The PR interval on this strip measures within the standard range (0.12–0.20 seconds), so this is not accurate.

C. The PR interval is within the normal time limits: The PR interval on the ECG strip spans about 3 to 4 small boxes (0.12–0.16 seconds), which is within the normal range of 0.12 to 0.20 seconds. This indicates normal conduction from the atria through the AV node to the ventricles.

D. Ventricular repolarization is delayed: Delayed ventricular repolarization refers to a prolonged QT interval, not an abnormality in the PR interval. The PR interval evaluates atrial conduction, not ventricular repolarization, so this is an incorrect association.

A. Increase in systolic blood pressure 10 mmHg above client's norm B. reports dyspnea after walking up 2 flights of stairs C. Jugular vein distention and +3 peripheral edema D. Complaints of epigastric pain after eating a large meal

Correct Answer is C

Explanation

A. Increase in systolic blood pressure 10 mmHg above client's norm: A mild increase in systolic blood pressure is not a specific indicator of mitral stenosis progression. Blood pressure fluctuations may occur due to various factors and are not typically used as a primary marker of worsening valve disease.

B. reports dyspnea after walking up 2 flights of stairs: Exertional dyspnea is a common early symptom of mitral stenosis due to reduced left atrial emptying and pulmonary congestion. However, this does not necessarily indicate worsening unless the symptom becomes more severe or occurs with minimal exertion.

C. Jugular vein distention and +3 peripheral edema: These are signs of right-sided heart failure, which may result from long-standing mitral stenosis leading to pulmonary hypertension and subsequent right ventricular hypertrophy and failure. This indicates disease progression and worsening cardiac function.

D. Complaints of epigastric pain after eating a large meal: Epigastric discomfort is not a typical symptom of mitral stenosis and is more likely related to gastrointestinal issues. It does not reflect the status or progression of the cardiac condition.

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Potassium 2.8 mEq/L
Sodium 133 mEq/L
Chloride 90 mEq/L
Glucose 200 mg/dl
Magnesium 2.5 mg/dL
Calcium 8.0 mg/dL

WBC	8.5
Hemoglobin	17g/dL
Hematocrit	54%
BUN	28mg/dL
Creatinine	1.1 mg/dL
Potassium	4.9 mEq/L

The nurse is caring for a patient following insertion of a left subclavian central venous catheter (CVC). Which action by the nurse best reduces the risk of catheter-related bloodstream infection (CRBSI)?

Nursing Test Bank

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