Our son had knee pain. Doctors used an X-ray and an MRI. I thought they used bone scans. Why not?

Our son had knee pain every time he tried to run or work out. We finally took him to the doctor’s. An X-ray was negative but the MRI was positive for a stress fracture. I thought they used bone scans to find things like this. Why not?

Diagnosing stress fractures isn’t easy. As you know they don’t show up on X-rays in the early stages. This is called a false negative. In other words, the X-ray was read as normal when there really was a problem.

Bone scans have the opposite problem. They often indicate there is a problem when there isn’t one. This is called a false positive. False positives are more common with children and teenagers who are still growing or remodeling bone.

MRIs seem to offer the best results when looking for bone stress injuries. In a recent study of military trainees with exercise-induced knee pain, two separate radiologists read the patients’ MRIs. They did this without knowing the patient’s symptoms or history. They didn’t consult with each other. There was good agreement between the two physicians and an accurate result with the MRI.

MRIs can’t show the difference between bone bruises and bone stress injuries because bone marrow edema is present in both. In such cases the physician must rely on the history.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Why are there so many types of hip implants out there?

Why are there so many types of hip implants out there?

Hip replacement surgery is becoming increasingly common. While at one time, it may have been thought that one replacement is as good as the next, surgeons and researchers have learned that there is no one-size-fits all hip replacement. Surgeons make the decision of what type of implant to use based on a few different factors:- how big is the person having the surgery- how much of the hip is being replaced (partial versus total)- in what condition is the patient’s bone- how active is the patient/how old is the patient- what is he or she most familiar with in terms of how often they’ve used what type of implant.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Stress fractures cause Army recruits to drop out of basic training

I’m a soldier in today’s army just finished with basic training. There were many recruits who dropped out in the first 90 days because of stress fractures. I was pretty glad it didn’t happen to me. Does anyone know why some trainees get these and others don’t?

It’s been clear for a long time that bone stress injuries occur from overuse. Not only military recruits but also athletes are at risk. More recently it has been observed that healthy adults starting a new or intense physical activity or exercise also suffer from stress fractures.

There may not be one single factor for everyone. Women seem to be at higher risk than men. This may have hormonal reasons or it could be biomechanical. For example women have a shorter stride length during marching. They may compensate by lengthening their stride and hitting the ground harder with their heels.

In a recent study from Finland military recruits who had been running before beginning military training had fewer stress fractures. This suggests gradual training may be a way to avoid stress fractures. Other possible factors include genetics, type of exercise, and terrain.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

I had a steroid injection for a chronic tendon problem. The pain is back. Should I have a second injection?

My doctor diagnosed me with a chronic tendon problem in the groin. After months of monkeying around with stretching and strengthening exercises, I finally had a steroid injection. It worked great — for about two months. Now the pain is back again. Should I have a second injection? There were a lot of warnings about too much steroid and how it could cause its own tendon damage.

Studies on the use of steroid injections for groin tendon problems are not plentiful. Research shows that one to three steroid injections of soft tissues for acute and/or chronic inflammatory pain can be beneficial. More than that and the risk outweighs the benefit because steroids are known to break down collagen fibers that make up tendons and muscles.But if you obtained pain relief the first time and it lasted eight weeks, chances are a second injection might resolve the problem for you. Some of it may depend on your activity level and any anatomical or postural issues that might be contributing to the problem.Some additional testing might be helpful. MRIs with contrasting dye can offer useful information. If you are a competitive athlete (participating in your sport four or more days each week), your risk of recurrence is much higher. This is likely because your activity level is high enough to repeatedly cause microtrauma of the affected tendon(s). A positive MRI showing uptake of the dye into the damaged tendon is a predictive factor for symptom recurrence in competitive athletes.For recreational athletes (participating in any sports activity less than four times per week), the MRI findings are not as predictive. Some folks don’t have any sign of tendon pathology on the MRI but still get pain relief from the steroid injection. With a lower activity level and greater ability to rest between sports activity, recreational athletes seem to benefit from the injection regardless of the MRI results.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

After a bout with Rocky Mountain Spotted Fever, I have knee pain when I run. Are they related?

I’ve been training for my third triathlon but I got sideswiped by a bout of Rocky Mountain Spotted Fever. I was down and out for three full months. Now that I’m starting back I notice a lot of knee pain I didn’t have before. Every time I try to bump up my training schedule the knee pain comes on. Is this left over from the fever?

There probably isn’t a direct link between the Rocky Mountain Spotted Fever and your new knee pain. A doctor would need to tell you for sure. Sometimes there is a residual arthritis that crops up after RMSF or Lyme disease. Both conditions are infectious diseases spread by the bite of a tick.

There are two other possible factors. One is weight loss. If you lost a major portion of body weight during your illness, you may have lost muscle bulk and strength as well. Bones are at increased risk of fracture without the protection of strong muscles around the joints.

The second is your training schedule. Many athletes jump right back into training where they left off instead of building up gradually. Many stress injuries occur when training frequency and intensity are too much too soon.

See a medical doctor before continuing your training program. If you’re cleared to go ahead, then step back a few notches and build up your strength first then endurance for the triathlon. If you were off for three months, you can expect it to take three months to regain your former training level.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Could groin pain curtail workouts for triathlete?

I’ve been training for a triathlon for three months now. All of a sudden, I’ve pulled up lame with groin pain. Can I safely work through the pain? If I keep training, how do I modify my workouts?

There are different problems that can cause groin pain. Before making a decision about your training regimen, see a sports medicine specialist for an examination and diagnosis. If you have a simple tendon strain, the treatment approach is very different from a sports hernia or stress reaction (fracture).An X-ray can rule out (or confirm) the presence of any bone fractures. Stress reactions are not visible for six to weeks after the damage has been done, so there may be a lag time before this diagnosis can be made. Another imaging study that might offer some useful information is a contrast MRI. A dye is injected that is taken up by the tendon where it inserts into the bone. Damage to the tendon fibrils leave the soft tissue edges open so that the dye seeps into the area. Not all tendon problems show up on MRIs, so this test is not 100 per cent accurate.There are some simple clinical tests the physician can use to pinpoint the problem. Reproducing your pain by pressing on the adductor longus, the most common tendon involved in groin pain, is a sure sign that the problem is extra-articular. Extra-articular means the pain is coming from outside the hip joint. Two other tests are helpful: resisting movement of the adductor muscles and assuming a position that stretches the muscles. Pain with either of these tests helps confirm the adductor muscle as the most likely cause.Once the diagnosis has been made, then your physician can advise you as to the best treatment or management approach. This could involve a period of rest and avoidance of weight-bearing activities. Or it could mean a change in your training protocol. Depending on how far away the triathlon is, you may still be on target after rest and recovery. Continuing to repeatedly stress the area is usually not advised.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

My knee replacement heats up after exercise. Should I be worried?

I can tell my new knee replacement heats up inside after I start to exercise. It seems to happen most often after I walk 20 to 40 minutes. Biking the same amount of time causes some warmth but not as much. Should I be worried?

There may be some cause for concern. Temperature increases in the joint can cause cell death and fibrous tissue to form. These changes can lead to pain and implant loosening.

A recent study at the University of Washington (Seattle) compared the temperature inside three types of knees. They measured the knees of normal adults, adults with arthritis, and patients with total knee replacements. The normal knees increased temperature by about one-degree after 20 to 40 minutes of activity (biking, walking).

Some of the implants had 2 to 3-degree changes. Knee replacements made of cobalt-chromium seem to generate the greatest amount of heat. Find out what kind of implant you have and what’s normal for that replacement. Make sure you go to your follow-up appointments with the surgeon. X-rays can be used to detect any early problems with the implant. Warmth can also be a sign of infection, which should be evaluated by your doctor.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

It’s been 48 hours since my dad fell and broke his hip. They say he needs more tests. Is this normal?

Dad fell over the weekend and was hospitalized with a broken hip. It’s been 48-hours and he still hasn’t had surgery. They say he has to have more tests done before they can operate. Is this normal?

Preoperative testing is not uncommon before surgery — especially for older adults who are at risk for complications from surgery. The surgeon wants to do everything possible to reduce those risks and assure the best results possible.Some of the more typical tests are to assess heart health and the risk of cardiac complications. Anyone with a history of unstable coronary syndrome, heart failure, valve disease, or problems with heart rhythm (arrhythmia/dysrythmia) will likely have a preoperative cardiac evaluation.The presence of any infection such as urinary tract infection or upper respiratory infection (e.g., pneumonia) will also increase the risk of serious complications after surgery. And by serious, we mean that studies show the death rate is higher for patients with these kinds of health concerns.Malnutrition is another problem that can affect the results of surgery. Nutrition experts have found that older adults who break a bone due to osteoporosis (brittle bones) often have low bone density because of a poor diet.On the other hand, there is some evidence that delays in surgery needed to repair a hip fracture can also represent a risk factor of its own. Even patients who are health going into the surgery are at an increased risk of infection and death when there’s a 24-hour delay. And delays also increase the risk of pressure ulcers (bed sores) in anyone who is malnourished.As a family member and advocate for your father, you can ask for an explanation for the delays and express your concerns. There may be other reasons why the operation has not taken place yet. Hospitals deal with limited staffing over the weekends, limited numbers of operating suites, and prioritizing surgical cases based on severity and availability of surgeons. All of these factors could have a role in your father’s current situation.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Will ACL tear jeopardize my college scholarship?

I’m entering my first practice season on a college soccer team. My entire college education depends on the athletic scholarship I’m going to school on. Lots of my teammates in high school had ACL tears and missed entire seasons of sports. How can I keep this from happening to me?

ACL injuries are common in athletes who jump, pivot, twist, or make sudden cutting movements. Girls are four to six times more likely than men to injure the ACL. Scientists aren’t sure why but they are studying this problem closely.

The latest findings suggest a problem with neuromuscular control. Any muscle weakness, loss of power, or failure to activate the muscles can lead to increased knee load. When the load is too much for the muscles, the ligaments tear or rupture.

One thing to watch for is a difference in strength from side to side. If one leg is 20 percent (or more) stronger than the other leg, there may be a neuromuscular imbalance. An athletic trainer or physical therapist can test you on a variety of hopping tasks. Any differences from side to side may help identify areas of weakness. Neuromuscular training for specific deficits is recommended.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

I am a hospital prevention specialist. What do other hospitals do to reduce complications after hip fracture repairs?

I am a designated prevention specialist in a small hospital setting. We see our fair share of broken bones and other emergencies involving senior citizens. We are focusing this month on hip fractures. I’m looking for any information about what other hospitals do to reduce complications after hip fracture repairs.

Older adults with hip fractures often have an underlying diagnosis of osteoporosis (brittle bones). As you have indicated, we know that complications associated with hip fractures in this age group are common — and can be deadly.Pneumonia, heart failure, infections, and pressure ulcers (bed sores) head the list of problems that some seniors face when a hip fracture occurs. And according to a recent report from the Washington University School of Medicine, a delay in surgery increases the risk of complications even in healthy patients.What can be done to reduce the number and severity of complications related to surgery for hip fracture? First, it’s clear from studies that a delay in surgery can make things worse. Even a 24-hour delay increases the risk of death. The longer the delay, the greater the risk of pressure ulcers. What’s causing the delays? One of the significant factors contributing to delays in surgery is the insistence on cardiac testing before surgery. In an effort to prevent heart attacks and other cardiac complications, this practice may increase the risk of such problems. Treating the heart conditions before having surgery seems like it makes good sense. But, in fact, studies show that testing doesn’t really change how these patients are treated — it just delays the surgery they were admitted for in the first place. A second, important risk factor for poor outcome after surgery for hip fracture is malnutrition. Decreased bone mass is often linked with poor nutrition. And with an inadequate diet comes weight loss and no fat to protect the bones when a fall occurs. Not only that, but malnutrition also leads to poor wound healing and an increased risk of those pressure ulcers already mentioned. What can be done when the patient comes in to the hospital with osteoporosis and a hip fracture? Isn’t it already too late to make a difference? Evidently not, according to several studies that showed using intravenous nutritional supplementation followed by vitamins taken by mouth can really make a difference. Nutritional consultation with a specialist is also advised. A nutritional expert can help with the immediate concerns about malnutrition as a risk factor for complications but also set up a plan for home once the patient is discharged. This step is essential in preventing future health problems of all kinds.Another important risk factor for complications associated with hip fracture surgery is low hemoglobin. Hemoglobin helps carry the oxygen you need in every cell of the body. Without enough hemoglobin, anemia develops. This particular risk factor has many causes to watch out for. Besides the obvious loss of blood from the surgery, there can be internal bleeding from the GI tract. Many older adults have bleeding ulcers from taking antiinflammatory drugs for their arthritis. Smoking adds to the risk of GI bleeding. One-third of all patients having hip fracture surgery end up needing a blood transfusion. What can be done to prevent bleeding problems? The research supports using a drug called proton pump inhibitor (PPI) right after surgery for anyone with risk factors for GI bleeding. Surgeons are also advised to do everything possible to avoid/reduce bleeding during the operation. This is possible now more than ever before with today’s minimally invasive surgical techniques.There are other measures that can be taken to decrease postoperative problems after hip fracture repair. These include protective padding over bony prominences to prevent pressure ulcers, antibiotics to prevent infections, and proper pain management to prevent stress-induced heart problems. Preventing blood clots through the use of medications, compression stockings, and pneumatic pumps applied to the lower legs for at least the first 24 hours is standard practice.You can take a look at these suggestions and compare them with standard operating procedures already in place within your facility. Any areas that are lacking can be reviewed by staff and administration for consideration and implementation. Gathering evidence from research and identifying best practice is a great way to get started when evaluating your own policies.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.