Total Pageviews



Thursday, November 1, 2012

Calcaneal (Heel Bone) Stress Fractures: A Cause of Significant Persistant Heel Pain

Patient presents with swelling under the heel bone. There is pain produced on side to side compression of the heel bone during physical examination. 
X-rays normally are inconclusive. The patient does not have to have a story of landing hard on the heel. Onset of pain normally occurs over a short time, whereas plantar fasciitis (more commonly a cause of heel pain) has a typically gradual onset of the pain, worsening slowly over a month or so. The typical differential diagnosis with significant heel pain with swelling is calcaneal stress fracture or plantar fascial tear. 

MRI is the conclusive test. It is important to note how close the stress lines are to the subtalar joint. The closer to the subtalar joint, the more consideration of non weight bearing 8 weeks of permanent casting. This is totally desvastating to a patient, so avoided when possible. The following are 4 MRIs for the patients with heel pain, each with different findings.
This MRI showed the bone swelling above the bottom of the heel bone due to a tear in the plantar fascia. You can see the intense swelling above and below the plantar fascia. This is not the pattern of swelling of a calcaneal stress fracture. A small blood vessel is seen running through the heel bone.

This is a tremendous bone reaction from a calcaneal (heel bone) stress fracture that runs from the bottom to the top of the heel to the subtalar joint. A permanent non weight bearing cast for 4-8 weeks could be easily recommended to protect the joint. This particular patient would have mentally lost it, so I did treat this with a removable cast. She has done well, but did take longer than normal. 

Same patient above, 3 months into her treatment, still very sore, with still bone swelling within the heel bone. As long as there is bone swelling, there will be pain (like the pain you get from a sinus headache). I never created a good pain free environment for multiple reasons, so the typical 3 months of immobilization actually lasted 6. She was however able to do intense spin classes and swim without problems during this time.  We consciously, as a physician and patient team, traded early function for a potentially longer rehabilitation period.

Normal heel bone with organized blood vessels.

     Once the diagnosis is made, here is a checklist of events that should happen:
  1. Questions about bone density issues, dietary habits, activity levels leading to overuse, selection of shoe  gear, and past history of fractures.
  2. The patient should be fitted for a removable walking boot, unless concern that the fracture goes too close to the subtalar joint. If the fracture is deemed non-weight bearing, a permanent cast is normally used for 4 to 8 weeks. I use a 1/2 inch accommodative pad to float the heel of the walking boot, and tend to use a below the knee cast over a shorter one. An EvenUp is used on the other shoe.    
  3. Over the first 2 weeks post diagnosis, you strive to create a pain free environment. The ease or difficulty in creating this pain free environment is an important clue on how serious the problem is. The average patient needs to be in the removable cast for 3 more months once the pain free status is attained. 
  4. Activity modification is crucial at this time.Bike and swimming are commonly used to maintain cardio, especially if a removable boot is used. Floor exercises for strength and flexibility are recommended. Pilates is a great source of these exercises. 
  5. Sole OTC orthotics are used within the cast produce heel padding and weight transfer into the arch.
  6. Contrast baths once or twice daily are vital at reducing heel bone edema (swelling). Swelling within the bone should be minimized since it actually can reduce the normal blood flow important for healing. This can slow healing.
  7. A Bone Stimulator for 6 to 9 months is used. I actually stop 2 months after full activity is resumed. I use Exogen ultrasound for this, but there are other good stimulators.
  8. The Primary Care Doc should discuss all the factors that effect bone healing including the right amounts of calcium, Vit D3, and other minerals. With bone injuries, I have the patients minimize their use of NSAIDs (like advil, etc). 
  9. Monthly return visits can be scheduled for a while. 
Sole OTC inserts with extra cushion in heel and extra Hapad arch support to transfer weight into the heel. 

One month after the diagnosis, the patient is normally casted for custom fitting soft orthotics. I use the Hannaford technique, but most professional orthotic labs have their versions that are similiar.These are dispensed in 1-4 weeks depending on the need to see that patient (if the pain free environment is established already, waiting 4 weeks to dispense the new orthotic devices is probably fine).
This shows the memory foam of a Hannaford soft based custom orthotic device. 

One month later, normally now 2 months post diagnosis, physical therapy can be started to decrease inflammation and work on the damaging aspects of casting: stiffness, weakness, loss of proprioception (balance), and sometimes nerve hypersensitivity. Physical therapy can be helpful until you are back to full activity, probably 3-6 months. Most of the time physical therapy can be effective at 1-2 times per week.
Patient in physical therapy doing contrast bathing to reduce bone swelling and its resultant pain. 

Three months post diagnosis should mean that the patient has been pain free for almost exactly 3 months with all of the above treatments. If it was tough to get the pain level under control, then this landmark may take much longer. It seems that the patient can successfully wean off the removable boot after being relatively pain free for 3 months, no matter how long that takes. To successfully wean off of the boot means that you can not have more pain out of the boot than in the boot. The removable boot or cast (I use those phrases to mean the same thing) is initially weaned off by keeping on at work, and gradually adding more time out of the boot at home or doing errands. When you are completely weaned out of the boot for home, gradually spend less time at work. During this time there can be no increase in pain, you should ice 2 or 3 times a day extra (ice pack 15 minutes to the bottom of the heel), and the whole process can take 4 to 6 weeks. During this time always have the boot with you!! You never know when you will need it.

Once you are out of the boot full time, you can gradually increase your activity. This is definitely for another post.

No comments:

Post a Comment

Thank you very much for leaving a comment. Due to my time restraints, some comments may not be answered.I will answer questions that I feel will help the community as a whole.. I can only answer medical questions in a general form. No specific answers can be given. Please consult a podiatrist, therapist, orthopedist, or sports medicine physician in your area for specific questions.