Medical Tests & Procedures Archive

The idea of having a knee replaced is daunting. But what if both of your knees need repairing? Is one visit to the operating room better than two?

If you are otherwise in good health, it's a conversation worth having with your doctor and rehabilitation team. There are some benefits to replacing both joints during a single surgery (called simultaneous replacement). These include undergoing anesthesia only once, fewer days in the hospital, and only one (albeit prolonged) rehabilitation that lets you resume normal activities sooner than two separate ones. 

Advances in imaging, measuring, and lenses are making the procedure even better.

Image: Thinkstock

A cataract—clouding of the lens inside the eye—is a common cause of poor vision and blindness among older adults. But cataracts can be removed and replaced with artificial lenses. Sound scary? It's not. "Cataract surgery is something that just about everyone will need if you live long enough. Thankfully, with all of the tools and technologies at our disposal, much of it has become fairly routine. The vast majority of people have excellent outcomes with improvement in their quality of vision," says Dr. Christian Song, a cataract and refractive surgeon at Harvard-affiliated Massachusetts Eye and Ear Infirmary.

Typical surgery

Cataract surgery is an outpatient procedure. To remove the cataract, the surgeon makes a circular incision around the eye's lens, and then uses ultrasound technology to break up and remove the cloudy lens. After that, a new lens is slipped into the eye.

A mail-order saliva test marketed to consumers may make some promises it can't deliver.

A new mail-order genetic test called StatinSmart bills itself as the first test to identify a person's risk of experiencing muscle pain from a statin. That sounds like potentially helpful information, given that up to half of people who are prescribed statins quit taking them because of perceived side effects—most often muscle pain. Others avoid statins altogether because of that worry.

But here's the rub: muscle problems can range from mild to serious, and the terms experts use to describe them can be confusing. The StatinSmart website says 29% of people who take a statin develop "statin-induced myopathy," which they define as muscle aches, pains, weakness, or cramps.

A study in the December 2015 issue of The Lancet Oncology found that a new test, called STHLM3, is more helpful at detecting aggressive cancer than traditional tests for prostate-specific antigen (PSA).

The STHLM3 test is a blood test that analyzes a combination of six protein markers, more than 200 genetic markers, and various clinical data, such as age, family history, and previous prostate biopsies.

Ask the doctors

Q: I'm expecting and want to have a vaginal delivery, but many of my friends have had cesarean sections lately. Is this a preference, or are there medical reasons to have a cesarean?

A: The health of the mother and baby, the family's personal preferences, and the hospital in which a woman delivers her baby play a role in determining whether she has a cesarean. Common medical reasons for cesareans include fetal malpresentation (when the baby is turned so that its feet or buttocks will come out first), pelvic disproportion (a birth canal that is unusually shaped or too small in relation to the size of the baby), and a past cesarean. A study published in the Journal of the American Medical Association in December 2015 suggests that such commonly cited medical issues may account only partly for high cesarean rates.

Image: Thinkstock

Targeted cancer therapies have limits, but some may offer a better option than standard chemotherapy.

Mention cancer treatment, and most men think of chemotherapy—complete with hair loss and extreme fatigue. But for some men, there is another option. Targeted therapies can sometimes treat certain cancers with fewer side effects and better outcomes.

Image: iStock

Cardiologists expect wider use of the less-invasive technique—known as TAVR—in the near future.

The one-way valve inside your aorta opens to allow blood to surge from the heart to the rest of your body. But as you age, the valve's leaflets may stiffen and become clogged with calcium deposits, restricting blood flow. About 12% of people ages 75 or older have this condition, known as aortic stenosis. Symptoms include feeling dizzy, faint, tired, and breathless. Unless the valve is replaced, half of people with symptoms from aortic stenosis die within two years.

Image: iStock

Being checked for hidden colorectal cancer is a smart bet, though it's hard to say whether it will ultimately extend your life span.

Recently, the National Colorectal Cancer Roundtable—a national organization of medical groups, health care providers, government agencies, and patient advocates—launched the "80% by 2018" initiative. The goal is to convince more people to get screened for hidden colorectal cancer. Right now, about 65% of Americans do so.

Image: Bigstock

Women can devise their own breast cancer screening schedules based on their risk and preferences.

If you tend to "go by the book" for preventive health care, you probably get a flu shot each fall, have a colonoscopy every 10 years, and generally follow the experts' recommendations. But what do you do about mammograms? For decades, the two most influential expert groups—the American Cancer Society (ACS) and the U.S. Preventive Services Task Force (USPSTF)—haven't agreed about when to start having mammograms, how often to have them, or how long to keep on having them. Although the two groups come a little closer together with their most recent guidelines, they still disagree about breast cancer screening for women ages 45 through 54.

Make sure you get your blood pressure measured at least once a year.
Image: Thinkstock

Screenings for cardiovascular disease, diabetes, and cancer aren't always routine.