Reduction of Risk Potential NCLEX-PN practice questions

Rationale

For thoracentesis, the client sits upright and leans forward with arms resting on an overbed table. This position widens the intercostal spaces, displaces lung tissue anteriorly, and allows pleural fluid to accumulate dependently at the lung base, facilitating safe needle insertion by the provider. Option A: The prone position is not used for thoracentesis and does not provide appropriate access to the posterior thorax for needle insertion. Option B: Positioning the affected side down compresses the procedural site and obstructs access; an upright forward-leaning position is required. Option D: The supine position does not adequately open the intercostal spaces and prevents pleural fluid from pooling in a dependent location accessible for needle insertion.

Answer: C

Rationale

For an accurate 12-lead ECG the client must be supine to standardize lead positioning and eliminate postural artifact. Instructing the client to lie still and breathe normally minimizes muscle and movement artifact, both of which can distort waveforms and lead to misinterpretation. Option B: Electrodes must be applied directly to the skin. Placing them over clothing introduces artifact and prevents adequate electrode-skin contact, yielding an unreliable tracing. Option C: The six precordial leads (V1–V6) are placed at specific anatomical landmarks across the anterior and lateral chest, not in a single vertical line. Incorrect placement produces inaccurate waveform data. Option D: The standard ECG recording position is supine. Sitting upright shifts the cardiac axis and alters waveform morphology, reducing diagnostic accuracy.

Answer: A

Rationale

Warfarin inhibits synthesis of vitamin K-dependent clotting factors, prolonging clotting time. The multiple bruises in various stages of healing provide visible evidence of impaired hemostasis. Recognizing this finding alerts the practical nurse to apply firm, continuous pressure for an extended period (at least 3–5 minutes) after needle withdrawal and to monitor the site closely to prevent hematoma formation. Option A: In anticoagulated or elderly clients, a smaller-gauge needle (e.g., 23-gauge) is often preferred to minimize vessel trauma and reduce bleeding risk. Using a larger-gauge needle would increase the risk of hematoma formation. Option B: Bruising on the forearms reflects anticoagulant-related impaired hemostasis, not intrinsic vein fragility. Appropriate forearm veins may still be accessible; the bruising itself does not preclude venipuncture at those sites. Option C: Atrial fibrillation is a cardiac dysrhythmia that does not increase the risk of venous spasm during venipuncture. This is not a clinically accurate association.

Answer: D

Rationale

Bright red blood collecting rapidly in the NG suction canister indicates active upper gastrointestinal hemorrhage, a serious post-operative complication that requires immediate notification of the RN and provider for urgent evaluation and intervention. Option A: Intermittent gurgling from the suction canister is a normal sound indicating that the low intermittent suction is cycling properly and does not indicate a malfunction or complication. Option B: Mild nares discomfort is a common and expected response to NG tube placement; routine comfort measures are appropriate and this finding does not require urgent escalation. Option D: Yellow-green (bilious) NG drainage in this volume is expected on post-operative day 1 following bowel surgery and does not indicate a complication requiring urgent reporting.

Answer: C

Rationale

A clean-catch midstream specimen reduces contamination from periurethral flora, improving the accuracy of dipstick results. Reading dipstick color changes against the manufacturer's reference chart within the specified time window (typically 60–120 seconds per pad) is essential because reactions outside that window are unreliable. Documenting results and reporting significant findings to the registered nurse is appropriate within the PN's scope of practice and supports continuity of care. Wearing gloves is required by standard precautions when handling any body fluid to protect both the client and the practical nurse. Option A: Urine specimens should be tested promptly; specimens left at room temperature for more than 1–2 hours may have falsely altered results due to bacterial proliferation, pH drift, and degradation of cellular elements, which compromises accuracy. Option E: The reagent strip should be briefly immersed in the specimen for approximately 1–2 seconds and then immediately removed with the edge blotted to remove excess urine. Prolonged submersion causes reagent leaching and produces inaccurate results.

Answer: B, C, D, F