Question 1

Currently,in most radiology departments,barium studies of the colon

Accepted Answer

Most radiology departments now perform double-contrast barium studies of the colon, which use both air (carbon dioxide) and barium to provide better visualization of the bowel mucosa and lesions. This requires a special colon preparation prior to the exam. Fluoroscopy is still the primary technology used for this type of exam, although virtual colonoscopy using CT is becoming more common. Single-contrast studies using Gastrografin may be used in select cases, but are not the standard of care for colon imaging.

Question 2

Post-procedural care for patients who have had a colon examination should include

Accepted Answer

All of the given options are important post-procedural care for patients who have had a colon examination. Maintaining hydration is important to prevent dehydration and to help flush out any remaining contrast dye. Increasing fluid intake and dietary fiber can help prevent constipation and improve bowel movements after the examination. Patients should also be aware of the change in stool color due to the use of contrast dye during the examination, and that it's important to eliminate the remaining barium during defecation. Therefore, Option D is the correct answer.

Question 3

After bedpan use,hygiene of the female patient's perineum is important.Proper cleansing of this region requires using gloves and several folded tissues to wipe the region

Accepted Answer

Proper cleansing of the perineum region requires wiping from the mons pubis to the anus to avoid bringing fecal matter towards the urethral meatus and genital area.

Question 4

NG tubes are inserted through the patient's _____ with the end of the tube placed in the _____.

Accepted Answer

NG tubes are inserted through the patient's nasopharynx with the end of the tube placed in the stomach.

Question 5

To facilitate removal of a nasogastric tube,the patient is

Accepted Answer

Encouraging the patient to take a deep breath helps to relax the gag reflex and make the removal of the nasogastric tube easier and less uncomfortable. Sedation, placing in Trendelenburg position, or drinking water through a straw are not appropriate or necessary interventions for removing a nasogastric tube.

Question 6

To allow tissue healing from a partial colon resection,

Accepted Answer

An external stoma is created to allow for defecation while the partially resected colon heals. This allows stool to bypass the healing area and prevents further trauma to the tissue. Sleeping position and liquid diet are not necessarily related to tissue healing from colon resection. Clamping off the colon distal to the resection site could lead to complications such as ischemia and necrosis.

Question 7

Performing fluoroscopic examinations of the colon are scheduled less often than before.The reason for this change in the clinical study of the colon includes

Accepted Answer

The sensitivity of colonoscopy (a more invasive and direct procedure) has surpassed the results of barium contrast colon studies, making colonoscopy a preferred method of examination.

Question 8

All of the following are true of virtual colonoscopy except

Accepted Answer

Virtual colonoscopy is primarily performed using computed tomography (CT) technology, not magnetic resonance (MR) technology.

Question 9

The use of a water-soluble contrast agent such as Gastrografin for a colon examination is warranted for patients with

Accepted Answer

The use of a water-soluble contrast agent such as Gastrografin is warranted for patients with a possible bowel perforation. This is because the contrast agent can help detect the presence and location of a perforation, as well as help prevent the spread of infection if a perforation is present. In the case of intussusception, treatment with contrast agents may be necessary, but it is typically done using air or barium enemas rather than water-soluble contrast agents. The use of contrast agents is not typically necessary or recommended for patients with diverticulosis or pancreatitis.

Question 10

Nasogastric (NG)tubes are inserted with the patient in the _____ position.

Accepted Answer

The high Fowler position, which is sitting up at a 90 degree angle, is the best position for inserting a Nasogastric (NG) tube as it allows for easier visualization and insertion of the tube, and reduces the risk of aspiration.

Question 11

The administration of glucagon shortly before a double-contrast barium enema is intended to

Accepted Answer

Glucagon is a hormone that acts as a muscle relaxant in the gastrointestinal tract, particularly in the smooth muscle of the intestinal wall. Therefore, the administration of glucagon shortly before a double-contrast barium enema can help relieve bowel spasm, making the procedure more comfortable for the patient and improving the quality of the images obtained. It does not have any effect on liver function, gallbladder emptying, or bowel motility.

Question 12

When transporting a patient with a NG tube to medical imaging,

Accepted Answer

It is important to confirm the suction pressure before disconnecting the tube, ensure that the NG tube is secured to the patient's nose, and confirm the allowable time for suction interruption to prevent any complications or discomfort to the patient during transport. Therefore, option D is the best choice.

Question 13

To diagnose the condition of colitis,

Accepted Answer

Colonoscopy is considered the preferred diagnostic study for colitis, as it allows for direct visualization of the colon and the ability to take biopsies for further evaluation. Single-contrast barium enema studies and double-contrast colon studies may also be used, but they are not considered the "gold-standard" and may not provide as thorough of an evaluation as colonoscopy. Heavy sedation is not always necessary for diagnostic studies of the colon.

Question 14

The most common type of nasogastric tube used for stomach decompression is the

Accepted Answer

The most common type of nasogastric tube used for stomach decompression is the single-lumen Levin tube. Swan-Ganz catheters are used for monitoring cardiac output and pulmonary artery pressures. Double-lumen valvular Clevis tubes are used for high-dose radiation therapy or implanted chemotherapy. Peripherally inserted central catheters (PICCs) are used for long-term intravenous access.

Question 15

Which of the following is a true statement regarding cleansing enemas?

Accepted Answer

The answer of Which of the following is a true...

Question 16

To confirm the placement of an NG tube in its proper position,a physician may use

Accepted Answer

Using both a syringe to remove gastric contents and fluoroscopy for visualization provides the most accurate confirmation of proper NG tube placement. Removing gastric contents verifies that the tube has entered the stomach, while fluoroscopy allows visualization of the tube's position in the gastrointestinal tract. Measuring the length of tubing inserted can be helpful, but it does not provide definitive confirmation of proper placement.

Question 17

For a single-contrast barium enema,

Accepted Answer

In a single-contrast barium enema, spot images of the cecum, hepatic flexure, splenic flexure, and sigmoid are typically taken to ensure proper visualization of these areas.

Question 18

As you arrive into a patient's room for transport to radiology,you notice that the patient has an NG tube in place with a syringe upright and pinned to the gown.You should know that this patient

Accepted Answer

The presence of a syringe upright and pinned to the gown indicates that the patient has a double-lumen NG (nasogastric) tube in place. This setup is often used for continuous or intermittent suction and decompression of the stomach, where one lumen is for suction and the other is for venting air.

Question 19

All of the following are true of cleansing enemas except

Accepted Answer

Cleansing enemas are not intended for administration of enteric medications, but rather to promote the defecation reflex and discharge by stimulating peristalsis and softening stool. The enema is considered complete when bowel contents are clear and free of fecal matter, and hydration is important to prevent dehydration in patients undergoing a cleansing enema.

Question 20

When performing a single-contrast barium enema examination,

Accepted Answer

Suspending the enema bag no greater than 30 inches above the table helps control the flow rate of the barium solution into the colon, making the procedure safer and more comfortable for the patient.

Quiz 19: Nonaseptic Techniques