Welcome to August!
With the weather really heating up, it seems like a good time to talk about…radiation! When I was a brand new SLP, I once asked the radiology technologist about making sure the fluoro was set for 30 pulses per second, as I had learned was the minimum acceptable pulse rate for Modified Barium Swallow Studies (MBSS) if you’re not using continual fluoro. The tech responded, “Oh don’t worry, we capture at 30 frames per second.”I was kinda confused, so I went with it…but then did a little research afterwards. And what I found was this: pulse rate is the number of individual images that are taken per second during the study, and frame capture rate is how many images are actually recorded per second. Soooooo during a study, if the frame rate is 30, but the pulse rate is 15, that means that only 15 individual pictures are taken per second…so you have what LOOKS good and continual, BUT you just have 15 pictures that are saved twice each!We have multiple experts and research papers1-3 with excellent reasons for us to use 30 pulses per second AND 30 frames per second if not using continual fluoroscopy. While we as SLPs need to be conscious of radiation safety (of course!), there is no point in exposing the patient to radiation at all if we aren’t getting quality data from the MBSS.For more information on radiation dosage and pulse/frame/continual fluoroscopy, see this great paper by Dr. Heather Bonilha et al.1

And for more information on performing an MBSS, check out this consensus paper from an expert panel.2

 

INDICATIONS AND USAGE | IMPORTANT SAFETY INFORMATION

These products should not be used in patients with known or suspected perforation of the gastrointestinal (GI) tract; known obstruction of the GI tract; high risk of GI perforation such as those with a recent GI perforation, acute GI hemorrhage or ischemia, toxic megacolon, severe ileus, post GI surgery or biopsy, acute GI injury or burn, or recent radiotherapy to the pelvis; high risk of aspiration such as those with known or suspected tracheo-esophageal fistula or obtundation; known severe hypersensitivity to barium sulfate or any of the excipients of the product used.

INDICATIONS AND USAGE | IMPORTANT SAFETY INFORMATION

VARIBAR® (barium sulfate)

INDICATIONS
VARIBAR® THIN HONEY (barium sulfate) oral suspension, VARIBAR® NECTAR (barium sulfate) oral suspension, and VARIBAR® THIN LIQUID (barium sulfate) oral suspension are radiographic contrast agents indicated for use in modified barium swallow examinations to evaluate the oral and pharyngeal function and morphology in adult and pediatric patients.

VARIBAR® HONEY (barium sulfate) oral suspension and VARIBAR® PUDDING (barium sulfate) oral paste are radiographic contrast agents indicated for use in modified barium swallow examinations to evaluate the oral and pharyngeal function and morphology in adult and pediatric patients 6 months of age and older.

IMPORTANT SAFETY INFORMATION

CONTRAINDICATIONS
These products should not be used in patients with known or suspected perforation of the gastrointestinal (GI) tract; known obstruction of the GI tract; high risk of GI perforation such as those with a recent GI perforation, acute GI hemorrhage or ischemia, toxic megacolon, severe ileus, post GI surgery or biopsy, acute GI injury or burn, or recent radiotherapy to the pelvis; high risk of aspiration such as those with known or suspected tracheo-esophageal fistula or obtundation; known severe hypersensitivity to barium sulfate or any of the excipients of the product used.

WARNINGS AND PRECAUTIONS

Hypersensitivity Reactions
Barium sulfate preparations contain a number of excipients, including natural and artificial flavors, and may induce serious hypersensitivity reactions. The manifestations include hypotension, bronchospasm and other respiratory impairments, and dermal reactions including rashes, urticaria, and itching. A history of bronchial asthma, atopy, food allergies, or a previous reaction to a contrast agent may increase the risk for hypersensitivity reactions. Emergency equipment and trained personnel should be immediately available for treatment of a hypersensitivity reaction.

Intra-abdominal Barium Leakage
The use of VARIBAR PRODUCTS is contraindicated in patients at high risk of perforation of the GI tract. Administration of VARIBAR PRODUCTS may result in leakage of barium from the GI tract in the presence of conditions such as carcinomas, GI fistula, inflammatory bowel disease, gastric or duodenal ulcer, appendicitis, or diverticulitis, and in patients with a severe stenosis at any level of the GI tract, especially if it is distal to the stomach. The barium leakage has been associated with peritonitis and granuloma formation.

Delayed Gastrointestinal Transit and Obstruction
Orally administered barium sulfate may accumulate proximal to a constricting lesion of the colon, causing obstruction or impaction with development of baroliths (inspissated barium associated with feces) and may lead to abdominal pain, appendicitis, bowel obstruction, or rarely perforation. Patients with the following conditions are at higher risk for developing obstruction or baroliths: severe stenosis at any level of the GI tract, impaired GI motility, electrolyte imbalance, dehydration, on a low residue diet, taking medications that delay GI motility, constipation, pediatric patients with cystic fibrosis or Hirschsprung disease, and the elderly. To reduce the risk of delayed GI transit and obstruction, patients should maintain adequate hydration after the barium sulfate procedure. When administering VARIBAR PUDDING, consider the administration of laxatives.

Aspiration Pneumonitis
The use of VARIBAR PRODUCTS is contraindicated in patients with trachea-esophageal fistula. Oral administration of barium is associated with aspiration pneumonitis, especially in patients with a history of food aspiration or with compromised swallowing mechanism. Vomiting following oral administration of barium sulfate may lead to aspiration pneumonitis. In patients at risk for aspiration, begin the procedure with a small ingested volume of VARIBAR PRODUCTS. Monitor the patient closely for aspiration, discontinue administration of VARIBAR PRODUCTS if aspiration is suspected, and monitor for development of aspiration pneumonitis.

Systemic Embolization
Barium sulfate products may occasionally intravasate into the venous drainage of the GI tract and enter the circulation as a "barium embolus" leading to potentially fatal complications which include systemic and pulmonary embolism, disseminated intravascular coagulation, septicemia and prolonged severe hypotension. Although this complication is exceedingly uncommon after oral administration of a barium sulfate suspension, monitor patients for potential intravasation when administering barium sulfate.

ADVERSE REACTIONS
The most common adverse reactions are nausea, vomiting, diarrhea, and abdominal cramping. Serious adverse reactions and fatalities include aspiration pneumonitis, barium sulfate impaction, intestinal perforation with consequent peritonitis and granuloma formation, vasovagal and syncopal episodes.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088. 

Please click here for full Prescribing Information for VARIBAR® THIN LIQUID (barium sulfate) oral suspension.

Please click here for full Prescribing Information for VARIBAR® THIN HONEY (barium sulfate) oral suspension.

Please click here for full Prescribing Information for VARIBAR® NECTAR (barium sulfate) oral suspension.

Please click here for full Prescribing Information for VARIBAR® HONEY (barium sulfate) oral suspension.

Please click here for full Prescribing Information for VARIBAR® PUDDING (barium sulfate) oral paste.

VARIBAR is manufactured by E-Z-EM Canada Inc., for E-Z-EM, Inc., a subsidiary of Bracco Diagnostics Inc., Monroe Twp., NJ 08831.

VARIBAR is a registered trademark of E-Z-EM, Inc.

See you soon,

References:1. Bonilha HS, Blair J, Carnes B, et al. Preliminary investigation of the effect of pulse rate on judgments of swallowing impairment and treatment recommendations. Dysphagia. 2013 Dec;28(4):528-38.2. Martin-Harris B, Bonilha HS, Brodsky MB, et al. The Modified Barium Swallow Study for Oropharyngeal Dysphagia: Recommendations From an Interdisciplinary Expert Panel. Perspect ASHA Spec Interest Groups. 2021 Jun;6(3):610-619.3. Mulheren RW, Azola A, González-Fernández M. Do ratings of swallowing function differ by videofluoroscopic rate? An exploratory analysis in patients after acute stroke. Arch Phys Med Rehabil. 2019 Jun;100(6):1085-1090.

US-VARH-2300010 08/23