Throughout decades of practicing medicine, I’ve witnessed a reality that repeats itself more often than many imagine: older people undergoing medical tests convinced they are taking care of their health, only to end up facing unexpected consequences. Not because medicine is dangerous, but because many tests are ordered automatically, without evaluating whether they actually provide a real benefit at that age.
After age 70, the body changes. Organs become more fragile, the capacity for recovery decreases, and the margin for error is considerably reduced. At this stage of life, not everything that is medically possible is necessarily the most advisable.
These are five checkups that, except in very well-justified situations, I wouldn’t routinely undergo after age 70.
1. Colonoscopy as a Routine Exam
For years, colonoscopy has been a cornerstone of colon cancer prevention, especially in young or middle-aged people. However, in older adults without clear symptoms, its automatic indication can be more risky than beneficial.
With aging, the intestine loses elasticity and the colon wall becomes more fragile. This is compounded by a particularly aggressive preparation, which includes potent laxatives and large volumes of fluids, capable of causing severe dehydration, blood pressure fluctuations, and cardiac or renal decompensation.
Furthermore, the risk of intestinal perforation during the procedure increases considerably after age 70. In that case, the only option is emergency surgery, which at this stage of life can lead to serious complications.
Safer alternatives exist, such as fecal occult blood tests, which allow for reasonable monitoring and only justify a colonoscopy if the result is abnormal.
2. Computed Tomography with Contrast Medium
Contrast-enhanced CT scans are often perceived as a modern and reliable study. However, in older adults, the contrast agent can pose a significant risk to the kidneys, whose function silently declines with age.
The contrast agent is eliminated through the kidneys, and in older adults, it can cause acute kidney damage. In some cases, a single unnecessary CT scan can trigger irreversible kidney failure leading to lifelong dependence on dialysis.
There are also risks of severe allergic reactions, even in people who have never had allergies before.
Whenever possible, safer alternatives such as non-contrast CT scans, ultrasounds, or MRIs should be considered, and kidney function should be checked beforehand.
3. Cardiac Stress Test Without Clear Symptoms
The stress test aims to evaluate the heart by subjecting it to intense physical stress. In young people or those with clear symptoms, it can be useful, but in older adults without specific complaints, it can become an excessive test.
Forcing the heart to work to its limit can trigger arrhythmias, sudden drops in blood pressure, fainting, or even heart attacks. Furthermore, this test has a high false-positive rate in older adults, leading to a cascade of unnecessary invasive tests.
In many cases, a resting electrocardiogram and an echocardiogram provide sufficient information without subjecting the heart to extreme stress.
4. Whole-body PET-CT as a general checkup
PET-CT promises a complete body scan and often generates a false sense of security. However, in older adults without clear symptoms, its use as a general checkup often causes more problems than benefits.
This study is extremely sensitive and detects minimal abnormalities that, in most cases, do not represent a real threat. The problem is that once a suspicious image appears, it initiates a chain of biopsies, invasive procedures, and constant anxiety.
Furthermore, PET-CT radiation is high, and the aging body’s ability to repair cellular damage is reduced. Paradoxically, a study performed to look for cancer can increase the risk of developing it.
5. Digestive endoscopy with sedation
The endoscopy itself is not the main problem, but rather the sedation. In older adults, sedatives are metabolized more slowly and can cause respiratory depression, prolonged confusion, falls, and serious complications.
There are cases in which, after sedation, the person does not wake up as expected and requires intensive care. Furthermore, the subsequent drowsiness significantly increases the risk of falls, which at this stage of life can be devastating.
In many cases, endoscopy without sedation is perfectly tolerable, lasts only a few minutes, and avoids unnecessary risks.
Checkups That Are Worthwhile at This Stage
Taking care of your health after 70 doesn’t mean abandoning checkups, but rather making better choices:
Basic blood tests to monitor glucose, cholesterol, and kidney function.
Regular blood pressure monitoring.
Bone densitometry to prevent fractures.
Ophthalmological and hearing checkups.
Simple fecal occult blood tests.
Balance assessment and fall prevention.
Tips and Recommendations
Before any test, always ask: What are they looking for? What are the risks? Will it actually change my treatment?
Avoid “routine” checkups without a clear indication.
Prioritize healthy daily habits over complex tests.
Reduce unnecessary medications and review your treatment regularly.
Maintain a proper diet, good hydration, and physical activity adapted to your age.
Quality of life should always be part of the medical decision.
Taking care of your health isn’t about getting more tests done, but about making informed decisions based on sound judgment and respect for the body that has sustained you throughout your life. Medicine practiced well isn’t about intervening the most, but about choosing the best time to do so.
