Final answer:
The definitive diagnostic test for confirming a diagnosis of UC is endoscopy, which allows for direct visualization of the colon and rectum. Other tests like blood tests, stool tests, and imaging tests may also be done to support the diagnosis.
Step-by-step explanation:
The definitive diagnostic test that a nurse would expect a patient with suspected UC (ulcerative colitis) to undergo in order to confirm the diagnosis is endoscopy. Endoscopy involves the use of a flexible tube with a camera to examine the inner lining of the colon and rectum, allowing for direct visualization of any inflammation or ulcers. This procedure can help to differentiate UC from other conditions with similar symptoms, such as Crohn's disease.
Additionally, other diagnostic tests may be done to support the diagnosis of UC, such as blood tests to check for markers of inflammation, stool tests to look for signs of infection or inflammation, and imaging tests like CT scans or X-rays to evaluate the extent of inflammation.
In conclusion, endoscopy is the definitive test for confirming a diagnosis of UC. However, additional tests may be used to support the diagnosis and assess the severity of the disease.