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MOH Radiographer Exam Blueprint

Understanding the exact breakdown of the MOH Radiographer test will help you know what to expect and how to most effectively prepare. The MOH Radiographer has multiple-choice questions The exam will be broken down into the sections below:

MOH Radiographer Exam Blueprint
Domain Name
Patient Communication, Assessment, and Management
Drugs and Contrast Materials
Anatomy, Physiology, and Pathophysiology
Radiologic Procedures
Radiation Safety, Radiation Biology, and Fluoroscopic Operation
Medical-Legal, Professional, and Governmental Standards

MOH Radiographer - Exam Topics Sample Questions

A T-tube cholangiogram is performed when?

Correct Answer:
after the gallbladder has been removed.


a t-tube cholangiogram is a specialized radiographic procedure conducted to visualize the bile ducts after the surgical removal of the gallbladder, known medically as a cholecystectomy. this x-ray examination is crucial for checking the patency of the bile ducts, ensuring there are no leaks, and confirming that no gallstones are left behind in the bile ducts. the t-tube itself is a temporary tube placed in the bile duct during the surgery to allow drainage of bile into a small pouch outside the body and to enable the injection of contrast material for the x-ray.

the primary reason for performing a t-tube cholangiogram is after the gallbladder has been removed. the gallbladder is typically removed due to conditions such as gallstones, cholecystitis, or other gallbladder diseases that cause pain and infection. after the removal, it is essential to assess the biliary tree (the system of ducts that conveys bile from the liver to the small intestine) for any residual stones, strictures, or leaks. the t-tube cholangiogram provides a clear visualization of these ducts and can help the surgeon address any complications effectively.

during the procedure, a contrast dye is injected through the t-tube into the bile ducts, and x-ray images are taken to trace the flow of the dye through the biliary system. this helps in identifying any abnormal conditions in the bile ducts. the process typically takes about an hour and is done under fluoroscopic guidance, which allows real-time imaging. after the procedure, if the imaging is satisfactory, the t-tube can be removed, and the bile duct is allowed to function normally.

it is important to note that a t-tube cholangiogram is not routinely performed in all cases of gallbladder removal. it is specifically done when there is a concern about possible complications such as bile duct injury or residual gallstones. therefore, not every patient who undergoes a cholecystectomy will need a t-tube cholangiogram. the decision to use a t-tube and perform a cholangiogram is based on the surgical findings and the discretion of the operating surgeon.

in summary, a t-tube cholangiogram is a diagnostic tool used primarily after the removal of the gallbladder to ensure the integrity and unobstructed function of the bile ducts. this procedure plays a crucial role in preventing postoperative complications and in ensuring the health and safety of the patient following cholecystectomy.

Which of the following hormones causes the gallbladder to contract?

Correct Answer:
cholecystokinin


cholecystokinin (cck) is the correct answer to the question, which hormone causes the gallbladder to contract. this hormone plays a critical role in the digestive process, particularly in how the body handles the intake of fats. when fats and fatty acids enter the duodenum—the first part of the small intestine—they stimulate cells in the lining of the duodenum to release cck. this hormone then enters the bloodstream and travels to various organs, including the gallbladder.

upon reaching the gallbladder, cck binds to receptors on the surface of the gallbladder, causing it to contract. this contraction pushes bile stored in the gallbladder into the cystic duct, which then flows into the common bile duct. concurrently, cck also acts to relax the sphincter of oddi, a muscular valve that controls the flow of bile into the small intestine. the relaxation of this sphincter along with the contraction of the gallbladder facilitates the efficient flow of bile into the duodenum, where it aids in the digestion and absorption of fats.

in contrast, the other hormones listed—antidiuretic hormone (adh), follicle-stimulating hormone (fsh), and prolactin—serve different functions in the body. adh primarily regulates water balance in the body by controlling the amount of water reabsorbed in the kidneys. this hormone is crucial for maintaining the body’s fluid balance and blood pressure. fsh is key in reproductive health, stimulating the growth of ovarian follicles in women and the production of sperm in men. prolactin is mainly involved in breast development and milk production following childbirth.

therefore, while these hormones have significant roles in various physiological processes, they do not contribute to the contraction of the gallbladder. only cholecystokinin has the specific function of inducing gallbladder contraction to facilitate the digestion of fats, underscoring its unique role in the digestive system compared to the functions of adh, fsh, and prolactin.