Medical Tests & Procedures Archive

Screening methods for colorectal cancer continue to evolve. Stool tests are becoming more accurate, and it appears that an experimental blood test might one day provide another effective screening option. The most accurate colorectal cancer screening is a colonoscopy, which allows a doctor to peer inside the colon and rectum, find cancers, and remove potentially precancerous polyps on the spot to prevent future cancer. It's unclear if a stool or blood test will ever be as good for screening as a colonoscopy.

Modern medicine offers ever-expanding ways to heal and prevent disease, but it's also true that health care can cause harm. Some harms are preventable while others are much harder to control. So how can you reduce your chances of being harmed?

A 2023 study suggests a blood test that looks for a specific biomarker may help identify people with Alzheimer's disease who may benefit from anti-amyloid therapy long before the disease is evident.

Three strategies can help decrease the number of days one must devote to medical appointments. The first is eliminating unneeded care, such as screening tests for people at low risk for certain conditions. The second strategy is coordinating various doctor visits, tests, or imaging for the same day. The third strategy is using telemedicine in place of appointments that would normally happen in person, such as mental health care visits or routine appointments for diabetes or high blood pressure.

Paroxysmal supraventricular tachycardia is caused by an electrical glitch in the heart's upper chamber that causes the heart rate to suddenly soar for no apparent reason—sometimes as high as 200 beats per minute. The condition, which people describe as palpitations or a fluttering sensation in the chest, is usually not dangerous. But long-lasting bouts can lead to lightheadedness, breathlessness, and fainting.

When a PSA test produces an abnormal result, the next step is usually a prostate biopsy, but these have drawbacks. Researchers are exploring strategies to avoid unnecessary biopsies, and a test that screens for prostate cancer in urine samples has shown promising results in testing.

Home sleep tests are often the preferred approach to detect obstructive sleep apnea. They use less equipment and cost less than studies done in sleep labs. Because people get to conduct the test in their own beds, they are more comfortable than they would be in a sleep lab, and the test is more likely to capture a person's natural sleep habits. But the tests aren't always accurate. And someone with a serious chronic condition, such as heart failure or a breathing disorder, might need additional data from an in-lab study.

A thoracic aortic aneurysm (a weakened area in the wall of the upper section of the aorta) may require surgical repair if it grows too large. Aneurysms in the area called the descending aorta can sometimes be repaired with a less invasive endovascular technique.

Implantable blood sugar monitoring devices known as CGMs have revolutionized care for millions of people with diabetes. Now several companies are marketing them for people without diabetes to monitor blood sugar levels –– but is there any evidence for health benefits?