A nurse is preparing a patient for magnetic resonance imaging (MRI) scan to confirm or rule out a spinal cord lesion.
Which action would pose a threat to the patient during the procedure?
The patient receives lorazepam 1 mg by mouth prior to the procedure.
The patient eats breakfast prior to the procedure.
The patient wears a watch and wedding band.
The patient is positioned supine.
The Correct Answer is C
Choice A rationale
Lorazepam is an anxiolytic medication that can help reduce anxiety and claustrophobia, which are common concerns during an MRI. Administering 1 mg orally is a standard and safe practice to promote patient comfort and cooperation without posing a direct threat during the procedure itself.
Choice B rationale
Eating breakfast prior to an MRI scan is generally not contraindicated unless the scan requires a specific type of contrast that necessitates fasting, or if sedation is planned. For a standard MRI of the spine, food intake typically does not interfere with the imaging or pose a safety risk.
Choice C rationale
A watch and wedding band are metallic objects. MRI utilizes strong magnetic fields; ferromagnetic materials are highly attracted to these fields and can become projectiles, posing a significant risk of injury to the patient or personnel. These items can also cause image artifacts.
Choice D rationale
Positioning the patient supine is a common and appropriate position for an MRI of the spine. This position helps to immobilize the patient and allows for optimal alignment of the spinal column within the scanner, facilitating clear image acquisition without posing a safety threat.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","E"]
Explanation
Choice A rationale
Measurement of post-void residual (PVR) urine volume is a valid indication for catheterization. This procedure assesses bladder emptying efficiency, particularly in patients experiencing urinary symptoms like hesitancy or incomplete voiding. Elevated PVR volumes (typically > 100 mL) can indicate outflow obstruction or bladder dysfunction, necessitating further investigation.
Choice B rationale
Relief of urinary retention is a primary indication for catheterization. Acute urinary retention, often caused by prostatic enlargement or neurologic dysfunction, results in painful bladder distention and potential renal compromise. Catheterization promptly drains the bladder, alleviating discomfort and preventing upper urinary tract damage by reducing intravesical pressure.
Choice C rationale
Routine acquisition of a urine specimen is generally not an indication for catheterization. Clean-catch midstream urine samples are typically sufficient for most diagnostic purposes, minimizing the risk of catheter-associated urinary tract infections (CAUTIs). Catheterization is invasive and should be reserved for situations where a clean voided specimen is unobtainable or specific sterile collection is required.
Choice D rationale
Convenience for nursing staff or the patient's family is not a legitimate medical indication for urinary catheterization. Catheterization is an invasive procedure associated with significant risks, including CAUTIs, urethral trauma, and patient discomfort. Its use should be medically justified and limited to situations where benefits clearly outweigh the potential harms, prioritizing patient safety.
Choice E rationale
An open perineal wound is a strong indication for urinary catheterization. Catheterization diverts urine away from the wound, preventing contamination and promoting optimal healing. Urine is inherently acidic and can introduce bacteria, impairing tissue repair and increasing infection risk in compromised perineal tissues, making diversion crucial for wound management.
Correct Answer is A
Explanation
Choice A rationale
Bright red blood in the urine, especially in large amounts or clots, after a cystoscopy is an abnormal finding. While some pink-tinged urine is expected, significant bright red bleeding can indicate hemorrhage or bladder wall injury requiring immediate medical intervention to prevent complications.
Choice B rationale
Urinary frequency is a common and expected finding after a cystoscopy due to irritation of the bladder mucosa from the procedure. This typically resolves within a day or two as the bladder recovers from instrumentation.
Choice C rationale
Pink-tinged urine is considered a normal and expected finding after a cystoscopy. The procedure involves instrumentation of the urethra and bladder, which can cause minor trauma to the mucosal lining, leading to a small amount of blood in the urine.
Choice D rationale
Burning on urination, also known as dysuria, is a common and expected sensation after a cystoscopy due to irritation and inflammation of the urethra and bladder from the scope. This discomfort usually subsides within 24 to 48 hours.
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