Wednesday, December 10, 2008

The Risk Associated with the Diabetic Foot

Diabetes, a disease where the body does not produce its own insulin (Type I) or where the body improperly uses its own insulin (Type II), results in increased blood sugar levels. Seven percent of Americans or 20.8 million people in this country are living with diabetes. This is a life-long disease that can severely affect the body’s major organ systems, particularly the feet and ankles.

Oftentimes, symptoms of diabetes such as numbness and tingling first appear in the feet. This is due to decreased sensation called neuropathy. Poor circulation and increased infection rates are common among diabetics and this combined with neuropathy is a recipe for disaster in the lower extremities. A diabetic ulcer usually comes from a simple corn, callus or blister. This occurs due to increased friction on a bony prominence such as a hammertoe or bunion. Ulcers and infections can also result from unknowingly stepping on a sharp object such as a piece of glass or needle while walking barefoot. One may only discover this occurrence after noticing blood or pus draining from their feet. Ulcerations can lead to a raging infection and ultimately loss of a toe or toes, part of the foot or even the leg or legs.

Another complication of diabetes is Charcot Joint, which is found in diabetics with neuropathy. Charcot causes a complete collapse of the joints in the foot most commonly in the mid-foot area leading to a permanent foot deformity known as rocker-bottom. Those with Charcot are also prone to ulcerations and amputations from this deformity.

Early detection and prevention are key factors in effectively dealing with the diabetic foot. A simple comprehensive foot exam by a local podiatrist at least once or twice a year can identify problems early and dramatically decrease the amputation rate. A podiatrist is frequently the first physician to identify the initial signs and symptoms of diabetes.

Management and prevention of diabetic complications is a team effort of physicians and a compliant patient. It is important for diabetics to check their feet every day, never walk barefoot, wear comfortable shoes that are not too tight and check shoes for any foreign objects. Feet, ankles and lower legs should be well moisturized. The skin on the bottom of the feet and especially heels are prone to dryness and cracking. A thick cream with at least a 10-20% urea moisturizing agent instead of plain lotion is best for this area as the skin is tougher and thicker on the soles of the feet. However, the area in between the toes should be kept dry. Fungus like warm, moist environments and fungal infections can occur with increased moisture in between the toes. Sock selection is also important. Seamless socks help prevent friction and skin irritation. White socks are preferred as any drainage or blood spots can become clearly visible immediately. Synthetic socks are also better at wicking away moisture keeping the area in between the toes dry. Those with thick fungal nails should have a podiatrist cut their toenails to prevent cuts and bruises that can ultimately lead to ulcers and amputations.

If you are diabetic and notice any changes in your feet or ankles such as bleeding, a callus, or ulcer, it is imperative that you seek treatment from your local podiatrist immediately to avoid a serious infection and possible amputation.

Diabetic Neuorpathy

Burning, tingling, and numbness in your toes and feet may be the first signs of diabetes. Peripheral neuropathy is a dysfunction of nerves and is commonly seen in the hands and feet. There are two types of nerves that may be affected: small nerve fibers, and large nerve fibers. Small nerve fiber damage will cause abnormal sensation and large nerve fiber damage leads to decreasing sensory perception and coordination. Damage to these nerves can be caused for several reasons, but the most common is diabetes. The progression of the neuropathy is highly dependent on the glucose levels in the blood, though the exact mechanism of damage is still unknown.

In uncontrolled or undetected diabetes, there are abnormally high levels of glucose or “sugar” in the blood. The abnormal levels of glucose causes multiple problems in your body including, eye, kidney, and cardiovascular damage. Often, the first problem noticed is the atypical sensations in the feet caused by peripheral neuropathy or nerve dysfunction. The symptoms are progressive and start at your toes and move up like a sock. Diabetic patients often complain of tingling, burning, numbness sensations, similar to the sensations a person feels when their foot “falls asleep.” Over time, the damage will lead to complete loss in sensation. This is the leading cause for diabetic foot ulcerations. A person with lost foot sensation still has motor (muscle) function and can continue to walk, but they are unable to detect sores or pain. Unknown sores on the feet combined with other diabetic complications leads to ulcers (open sores) and sometimes amputations.

To assess your peripheral nerve function, a podiatric physician can do several basic screening tests. While the patient’s eyes are closed, the podiatric physician uses several tools to test the small and large fiber nerves in the foot. Such tools consist of a Semmes Weinstein Monofilament (similar to fishing line), tuning fork, and a Q-tip. It is such a simple screen and takes only five minutes to perform, so, there is no excuse for diabetics or pre-diabetics not to get tested. Early detection of neuropathy can greatly decrease its progression and protect the feet from ulcers, infections, and even amputations.

Diabetes is one of the leading causes of death in the United States and the complications associated with the disease can greatly impede on a person’s quality of life. It is important to prevent and detect diabetes early to avoid and slow down the debilitating damage of the high glucose levels in the blood. Diabetes has a great effect on a person’s feet and often shows some of the first signs of diabetic complications. Thus, one with diabetes or diabetic risk factors should pay close attention to their feet and contact their podiatric physician.