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wound care

AUTHOR: Marc Mitnick DPM

REVIEWED BY: Podiatric Medical Review Board

--> wound care

Within the last 15 years or so, wound care has become a specialty all onto itself. I do not have any hard facts to support the following statement, but the foot probably demonstrates the highest incidence of wounds more so than any other part of the body. Additionally, the foot has obstacles in treating wounds that is not seen elsewhere in the body. The two most obvious obstacles are the fact that circulation to the foot in many cases is compromised and by walking on the foot (and the wound), the healing process is greatly diminished.

Podiatrists have become the leaders in the local management of wounds. Most wound care is done in a team approach, meaning other medical specialties get involved, but the day to day care of the wound falls in the hands of the podiatrist.

For those who suffer from wounds of the foot the healing process can end up being a long drawn out process; in some cases a wound never heals and with a chronic wound the patient is always at risk for infection and loss of limb. Wound care in the foot is a complicated procedure, there is no one approach. Each wound is different and requires different treatment. The purpose of this article is to help those who are presently suffering from a wound of the foot in understanding the wound care process. Hopefully, what you read here will reinforce what your doctor has told you and you as the patient, will be more compliant in the instructions you have already been given.

can I walk on my foot wound?

ulcer with granulating base
Invariably when I attend a wound care conference, at some point, one of the speakers will say the following: "when it comes to wound healing it is not so much what you put on it (medication and dressing), but rather what you keep off of it (non-weightbearing)". What this means, and this is very important, is the more you walk on a wound on the bottom of your foot, the longer it will take for the wound to heal. So, when no one is around and you start walking on the wound because it is just easier than using your crutches or special boot, the only person you are hurting is yourself. There is no two ways about it, a wound on the bottom of the foot is going to adversely affect your every day lifestyle. The gold standard for off-loading a wound is through the use of a contact cast. Sometimes cam walkers may be used along with special surgical shoes and in some cases your doctor will just want you using crutches. The decision as to what type of off-loading to employ is based on a few factors including location of wound, weight of the patient, physical capabilities of the patient, etc.

For those of you who are suffering from a wound on the bottom of your foot, you probably noticed that prior to the wound you may have had a callus or hard spot in the area that the wound now occupies. What happens is due to too much pressure on an underlying bone, the body will normally form a callus in varying thickness. The thickness will be determined by the overall foot structure of the patient, their overall body weight, the types of shoes they wear and the walking surfaces where they do the most walking. All things being equal, a letter carrier would stand a greater chance of developing a foot wound than someone who sits at a desk all day.

factors that contribute to wounds on the bottom of the foot

Due to a lot of variables such as:

  • lack of sensation on the bottom of the foot
  • poor circulation to the foot
  • elevated blood sugars in an uncontrolled diabetic
  • poor foot hygiene
  • improper shoes
  • excess body weight
A callus on the bottom of the foot will begin to first thicken and then at some point will break down and become a wound.
ulcer with granulating and fibrotic base
Many of you reading this will remember that prior to the development of your foot wound, your doctor may have given you a warning on the proper care of your feet. You may or may not have complied, however, sometimes even with good patient compliance a wound may still form.

As I mentioned earlier, not all wounds are the same and so wound care will differ from person to person. For this reason the medication used for wound care will also vary from patient to patient. There is no one topical medication that is effective for all types of wounds. The purpose of these different types of dressing is to create an optimum environment for wound healing to take place.

four categories of wound care dressings

calcium alginates- The first group is known as the calcium alginates. An example would be Silvercel which are very absorbent. Many wounds present with a lot of drainage. In order to create the optimum environment, the wound has to be dried out to some extent, and Silvercel will absorb the moisture to form a gel. This type of dressing is changed frequently and is used until the wound is much less moist but not completely dried out.

foams- The next classification of dressing are known as foams. They too are used to treat heavy draining wounds and the nice thing about this type of dressing is that they will not stick to the wound and can be left on longer than the calcium alginates. An example of the foams is Polymem.

collagens- The next group are known as the collagens which are also absorbent and will not stick to the wound. In addition to pads they also come in powders. They can be packed into the wound and are used for infected wounds. A point to be made here is that all infected wounds will have drainage, but not all draining wounds are infected. That is an important distinction and that will explain why some patients are put on antibiotics either oral or intravenous and other are not put on antibiotics. An infected wound will have certain characteristics and in this day and age it is important to avoid the indiscriminate use of antibiotics which in the long run lessen the effectiveness of antibiotics in general.

ulcer with fibrotic base
hydrogel dressings- The last group of dressings are known as hydrogel dressings. Possibly the most popular is Amerigel. This is used when there is either little drainage or no drainage at all, all the way to a very dry wound. What these actually do is create a moist environment. Sounds contradictory doesn't it? Actually, wounds that are too dry are just as difficult to close as are wounds that are draining too much. Again, it is all about creating the optimum wound environment, which is a moist wound that is not draining. Years ago betadine was the standard for treating wounds and while betadine is great at killing bacteria it dries the wound out so much that there is virtually little chance of the wound closing. Betadine still has a place in wound care and it is usually used when the patient first presents with a heavy draining wound, but once the wound shows signs of reduced draining, the dressing should be switched to another type dressing.

With all the above dressings the frequency with which they are changed will vary from patient to patient and is based on what your doctor is trying to accomplish. A dressing that has a tremendous amount of drainage, may initially have to be changed daily until the drainage diminishes at which point the dressing change will be less frequent.

evaluating your wound

During your visit to the podiatrist, he or she will generally first observe the wound. The things that are important to note include the diameter of the wound and the depth of the wound and usually your doctor will measure these at each visit. Obviously a reduction in width and depth shows that the wound is improving. The doctor will also note what the base or bottom of the wound looks like. A good healthy wound with adequate blood coming into the area should appear beefy red. This is known as a good granulating base meaning all the components are in place for healing. Sometimes, however, the base of the wound will be greyish to yellow in color and this is a sign of a poor granulating base and thus the chances of closure are dramatically reduced.

decubitus ulcer

Your doctor will also make note of the edges of the wound. In many instances the tissue around the wound becomes very hard. Again, the more you bear weight on the foot, the harder the surrounding skin will become. The problem here is that this skin which is known necrotic skin not only makes closure of the wound difficult but it is a focal point for bacterial infection. Once your doctor is done observing the wound, he or she will usually debride (cut away) all this necrotic tissue in an effort to once again create an optimum wound healing environment. Depending on the type of wound, most of them can be debrided in an office environment, however, some wounds such as very dry ulcers may be too painful to debride and will have to be done in the hospital under sedation. As a side note, if there happens to be a lot of bleeding, that is actually a good thing as it demonstrates that adequate blood is coming into the wound.

What I have discussed so far is the basic management of wounds, at least on the foot. However, in many instances this may not be enough to get the wound to close. At this point, and this point being where your doctor has noted that there has not been any substantial improvement in the size of the wound over a month or two. The rule of thumb is if the ulcer size has not decreased by 50 percent in this period of time, then chances are it will never close without additional treatment approaches.

continue....wound care


National Institutes of Health

American Podiatric Medical Association


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Wonderful advice

by: Anonymous

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by: Max

location unknown
Again, I really appreciate that you responded to my inquiry, and that your mention of Parkinson's helped me to find my way to a diagnosis of this difficult to diagnose disease. Most patients see on average 16 doctors before they are diagnosed. I hope that you can help other people that ask for your expertise in the future.

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Many Thanks Dr Marc!
Thank you for your response. It sounds like a good plan to me. He did not cut the wart out first ...


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Lynne T.

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New Jersey

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a mom

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