Dennis J. Bonner, MD

Complex Regional Pain Syndrome

Complex Regional Pain Syndrome

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Complex Regional Pain Syndrome

Complex regional pain syndrome (CRPS) is a kind of chronic pain that generally affects one arm or one leg. A combination of factors causes it. CRPS is most often caused by an accident, a surgical procedure, a stroke, or a heart attack. CRPS is a rare condition, and the exact cause is unknown. When treatment is started as soon as possible, it is most effective. It is possible to see improvement and even remission in such situations.

CRPS is defined as pain that a patient experiences disproportionately to the incident that triggered the condition. In addition to autonomic dysfunction, edema, dystrophic skin changes, stiffness, functional impairment, and eventually atrophy, CRPS is accompanied by many other symptoms.

Symptoms of Complex Regional Pain Syndrome

In other cases, symptoms may fluctuate over time and differ from one individual to the next. Most often, the symptoms of pain, swelling, redness, notable temperature fluctuations, and hypersensitivity (especially to cold and touch) manifest themselves first and foremost.

The injured limb may grow chilly and pallid as time goes on if left untreated. Skin and nail abnormalities, as well as muscular spasms and tightness, are possible side effects. Once these alterations have taken place, the disease is often irreversible.

On rare occasions, CRPS may extend from its original place to another part of your body, such as the opposite limb.

Some persons have a remission of their CRPS signs and symptoms independently. Others may have signs and symptoms that last for months or even years. Treatment is most likely to be most successful if it is started early in the illness's progression.

The following symptoms and signs characterize CRPS:

·      Burning or throbbing pain that lasts for an extended period, commonly in your arm, leg, hand, or foot

·      Feelings of sensitivity to the touch or the cold

·      An increase in the size of the painful area

·      Skin temperature fluctuations — switching between sweaty and chilly conditions

·      Various shades of skin tone, ranging from white and blotchy to red or blue, may be seen.

·      Skin texture changes, with the afflicted region becoming sensitive, thin, or glossy due to the condition.

·      Changes in the development of hair and nails

·      Stiffness, swelling, and damage to the joints

·      Muscle spasms, tremors, weakness, and memory loss are all symptoms of ALS (atrophy)

·      Reduced capacity to move the bodily portion that has been injured

Causes of Complex Regional Pain Syndrome

The exact etiology of Complex Regional Pain Syndrome (CRPS) is unknown. It is believed to be caused by an injury to or an anomaly of the peripheral and central nervous systems, among other things. When CRPS manifests itself, it is usually a consequence of a traumatic event or injury.

A significant number of instances of CRPS develop as a result of severe trauma to an arm or a leg. Crushing injuries and fractures are examples of this kind of injury.

In addition to surgery and heart attacks, infections, and even sprained ankles, other major and small trauma may result in chronic regional pain syndrome (CRPS).

It is not completely known why these injuries might result in CRPS symptoms. Not every person who suffers from a traumatic injury will acquire CRPS. Your symptoms might be caused by a bad relationship between your central and peripheral neural systems, as well as by improper inflammatory reactions.

The most common actions or activities that lead to CRPS are:

·      Fractures

·      Surgery

·      Sprains/strains

·      Lesser injuries such as burns or cuts

·      Limb immobilization (often from casting)

·      Very rare penetrations

·      Poor circulation can impede nerve and tissue healing

·      Poor nerve health

Categories of Complex Regional Pain Syndrome

CRPS may be classified into two categories, both of which have identical signs and symptoms but distinct categories:

Type 1 is the most common. This kind of reflex sympathetic dystrophy (RSD) develops after an illness or injury that does not directly destroy the nerves in the afflicted limb, such as in a car accident. Type 1 CRPS affects around 90% of those who suffer from it.

Type 2 (also known as Type 2A). This kind, formerly known as ascausalgia, shows symptoms similar to those of type 1. Type 2 CRPS, on the other hand, develops after a specific nerve lesion.

Diagnosis of Complex Regional Pain Syndrome

Though chronic regional pain syndrome (CRPS) often improves with time, diagnosis is easiest early in the disorder's progression and should not be delayed. There is no precise test that can be used to confirm CRPS or to pinpoint the damaged nerve. The following are some instances of a diagnostic to consider:

·      A thorough evaluation by a medical professional who is acquainted with the usual patterns of sensory nerve architecture, as aberrant skin is typically shown by having them sketch the shape of the area that is impacted by the nerve

·      Nerve conduction investigations may identify some, but not all, of the nerve damage associated with CRPS

·      It is possible that imaging nerves using ultrasound or magnetic resonance imaging (MRI), also known as magnetic resonance neurography (MRN), would uncover underlying nerve damage. An MRI scan showing abnormalities in the bone marrow and bone may aid in identifying the damaged nerve.

·      Bone scans (using a dye) may reveal CRPS-associated increased bone resorption, which may aid in the diagnosis and localization of the condition.

Prevention

The following actions may minimize your chance of acquiring CRPS:

After suffering a wrist fracture, you decide to take vitamin C.

According to research, those who take a high dosage of vitamin C after a wrist fracture may have a decreased chance of developing CRPS when compared to those who do not take vitamin C after the fracture.

After a stroke, it is important to begin movement as soon as possible.

According to some studies, persons who get out of bed and move about as soon as possible after having a stroke (early mobilization) had a lower chance of acquiring chronic regional pain syndrome.

Treatment of Complex Regional Pain Syndrome

Complex regional pain syndrome is incurable and has no known treatment (CRPS). The objective of therapy is to alleviate your pain and other symptoms while also restoring function to the damaged limb and maintaining the overall quality of your life, if possible.

It is critical to begin therapy as soon as possible in the course of CRPS. This is because CRPS may cause the afflicted limb to stiffen over time, and the pain typically intensifies if left untreated, making movement more difficult to achieve.

Treatment for complex regional pain syndrome (CRPS) needs a variety of techniques that must be carefully controlled by doctors and therapists who are familiar with this complicated disorder.

The following are examples of treatment methods:

·      Physical therapy and occupational therapy

·      Mirror therapy

·      Desensitization

·      Psychotherapy

·      Cognitive-behavioral therapy

·      Biofeedback

·      Relaxation techniques

·      Acupuncture Hypnosis

·      Reiki

·      Chiropractic

·      Medications

In the United States, there are no specifically authorized drugs for CRPS. On the other hand, many other medications from various drug classes may be tested. Topical analgesic creams and patches (such as lidocaine) may be used to alleviate pain in certain cases. In addition to these treatments, ketamine, dextromethorphan, opioids, certain antidepressants, anti-seizure medications, and anti-inflammatory drugs alleviate pain in some patients with chronic pain.

You may choose to consider the following more invasive therapies if the drugs mentioned above do not improve your condition or if you are experiencing extreme pain or persistent CRPS.

·      Sympathetic nerve blocks

·      Intrathecal drug pumps

·      Spinal cord stimulation

·      Dorsal root ganglia stimulation

Daily living with CPS

Chronic regional pain syndrome (CRPS) recurs in around 10% to 30% of individuals. Most recurrences are caused by unexplained factors, with the remainder being linked to a new accident or surgery.

Everyone's experience with chronic regional pain syndrome (CRPS) is unique. Some persons see a complete disappearance of their symptoms (remission), while others experience no change or a decrease in severity. CRPS will worsen in some people and may extend to other parts of the body in others. It is impossible to anticipate how each individual will turn out.

Stress has been shown to have a direct impact on pain levels. Stress from any source, including anxiety, pain, and financial problems, may all affect the region of the brain that is in charge of the autonomic nervous system and lead it to malfunction.

The essential objectives are to alleviate discomfort and restore mobility and strength to the damaged limb as quickly as possible. By gaining pain-alleviation, you boost your chances of increasing your function and overall quality of life. People with CRPS can effectively control their pain and maintain an active lifestyle thanks to carefully chosen drugs. Additional procedures are required for certain individuals to alleviate their pain.