Diabetes: Startling Statistics

Diabetes mellitus is a chronic disease that affects the lives of about 16 million people in the United States, 5.4 million of whom are unaware that they even have the disease. Every day, 2,200 new cases of diabetes are diagnosed, and an estimated 780,000 new cases are identified each year. The disease is marked by the inability to manufacture or properly use insulin, and impairs the body’s ability to convert sugars, starches, and other foods into energy. The long-term effects of elevated blood sugar (hyperglycemia) are damage to the eyes, heart, feet, kidneys, nerves, and blood vessels.

Symptoms of hyperglycemia may include frequent urination, excessive thirst, extreme hunger, unexplained weight loss, tingling or numbness of the feet or hands, blurred vision, fatigue, slow-to-heal wounds, and susceptibility to certain infections. People who have any of these symptoms and have not been tested for diabetes are putting themselves at considerable risk and should see a physician without delay.

Part of keeping your diabetes in control is testing your blood sugar often. Ask your doctor how often you should test, and what your blood sugar levels should be. Testing your blood and then treating high blood sugar early will help you to prevent complications.

The socioeconomic costs of diabetes are enormous. The costs have been estimated at $98 billion annually, about $44 billion of which are direct costs from the disease with $54 billion indirectly related. Diabetes is the sixth leading cause of death by disease in the United States, and individuals with diabetes are two to four times as likely to experience heart disease and stroke.

The growth of the disease worldwide is especially alarming. The World Health Organization (WHO) expects the number of new diabetes cases to double in the next 25 years from 135 million to nearly 300 million. Much of this growth will occur in developing countries where aging, unhealthy diets, obesity, and sedentary lifestyles will contribute to the onset of the disease.

While there is no cure for diabetes, there is hope. With a proper diet, exercise, medical care, and careful management at home, a person with diabetes can keep the most serious of the consequences at bay and enjoy a long, full life.

How Do You Get Diabetes?

No one knows why people develop diabetes, but once diagnosed, the disease is present for life. It is a hereditary disorder, and certain genetic indicators are known to increase the risk of developing diabetes. Type 1, previously known as insulin-dependent diabetes mellitus or juvenile-onset diabetes, afflicts five to ten percent of diagnosed cases of diabetes. This type occurs most frequently in children and adolescents, and is caused by the inability of the pancreas to produce the insulin needed for survival. Type 2, previously called noninsulin-dependent diabetes mellitus or adult-onset diabetes, affects the other 90-95 percent of all diagnosed cases of diabetes, many of whom use oral medication or injectable insulin to control the disease. The vast majority of those people (80 percent or more) are overweight; many of them obese, as obesity itself can cause insulin resistance.

Certain characteristics put people at a higher risk for developing Type 2 diabetes. These include:

African Americans are 1.7 times more likely to have diabetes than the general population, with 25 percent of African Americans between the ages of 65 and 74 diagnosed with the disease.

Hispanic Americans are almost twice as likely to develop type 2 diabetes, which affects 10.6 percent of that population group.

Native Americans are at a significantly increased risk for developing diabetes, and 12.2 percent of the population suffers from the disease. In some tribes, as many as 50 percent of its members have diabetes.

Of all the risk factors, weight is the most important, with more than 80 percent of diabetes sufferers classified as overweight.

Causes

Foot problems in persons with diabetes are usually the result of three primary factors: neuropathy, poor circulation, and decreased resistance to infection. Also, foot deformities and trauma play major roles in causing ulcerations and infections in the presence of neuropathy or poor circulation.

• Neuropathy (Nerve Damage)
  Your ability to detect sensations or vibration may be diminished. Neuropathy allows injuries to remain unnoticed and untreated for lengthy periods of time. It may cause burning or sharp pains in feet and interfere with your sleep. Ironically, painful neuropathy may occur in combination with a loss of sensation. Neuropathy can also affect the nerves that supply the muscles in your feet and legs. This ‘motor neuropathy’ can cause muscle weakness or loss of tone in the thighs, legs, and feet, and the development of hammertoes, bunions, and other foot deformities.

• Poor Circulation
  Persons with diabetes often have circulation disorders (peripheral vascular disease) that can cause cramping in the calf or buttocks when walking. The symptoms can progress to severe cramping or pain at rest, with associated color and temperature changes (the feet may turn bright red when hanging down and constantly feel cold). Also, the skin may become shiny, thinned and easily damaged. A reduction in hair growth and a thickening of the toenails might also be present.

Poor circulation, resulting in reduced blood flow to the feet, restricts delivery of oxygen and nutrients that are required for normal maintenance and repair. Healing of foot injuries, infection or ulceration is affected. Peripheral vascular bypass operations may avert lower extremity amputation.

• Infection
  Persons with diabetes are generally more prone to infections than non-diabetic people. Due to deficiencies in the ability of white blood cells to defend against invading bacteria, diabetics have more difficulty in dealing with and mounting an immune response to the infection.

Infections often worsen and may go undetected, especially in the presence of diabetic neuropathy or vascular disease. Often, the only sign of a developing infection is unexplained high blood sugar, even without fever. The combination of fever and high blood sugar often warns of a severe infection requiring hospitalization. Lesser degrees of infection are often treated on an outpatient basis.

Ulcers of the Foot

An ulceration or ulcer is usually a painless sore at the bottom of the foot or top of the toes, resulting from excessive pressure at that site. Ulcers frequently underlie a pre-existing corn or callus that was allowed to build up too thickly. Trauma from heat, cold, shoe pressure, or penetration by a sharp object are also potential causes. Neuropathy allows the lesions to develop because the normal warning sense of pain has been lost and they go unrecognized. Continued pressure or walking on the injured skin creates even further damage and the ulcer will worsen. The open sore will frequently become infected and may even penetrate to bone.

Treatment relies on early recognition of the ulceration by a podiatric surgeon, avoidance of weight bearing activities such as walking, avoidance of wearing "closed-in" shoes, and early intervention. Besides local wound care, dressings and antibiotics, other measures may be necessary to adequately relieve pressure on the area. When use of crutches, a wheelchair, or rest is not feasible, plaster casts, braces, healing sandals, or orthoses (special shoe inserts) can be used to protect the foot while it heals. If circulation is inadequate to allow healing, your podiatric surgeon may refer you to a vascular surgeon for appropriate evaluation and possible vascular reconstructive surgery.

Once an ulcer has healed, it is important to continue to see your podiatric surgeon regularly. Special footwear and inserts may be recommended to protect your feet and prevent new or recurrent lesions from developing.

The Role of Your Podiatric Physician

Because diabetes is a systemic disease affecting many different parts of the body, ideal case management requires a team approach. The podiatric physician, as an integral part of the treatment team, has documented success in the prevention of amputations. The key to amputation prevention in diabetic patients is early recognition and regular foot screenings, at least annually, from a podiatric physician.

In addition to these check ups, there are warning signs that you should be aware of so that they may be identified and called to the attention of the family physician or podiatrist. They include:

If You Have Diabetes Already . . . DO: