Spinal cord trauma

Spinal cord injury; Compression of spinal cord; SCI; Cord compression

The spinal cord contains the nerves. These nerves carry messages between your brain and body. The cord passes through your neck and back down to the first lumbar vertebra.

Spinal cord injury (SCI) can be caused by any of the following:

• Assault
• Falls
• Gunshot wounds
• Industrial accidents
• Motor vehicle accidents
• Sports injuries

A minor injury can damage the spinal cord. Conditions, such as rheumatoid arthritis or osteoporosis can weaken the spinal cord. Injury can also occur if the spinal canal protecting the spinal cord has become too narrow (spinal stenosis). This occurs during normal aging.

Direct injury or damage to the spinal cord can occur due to:

• Bruises if the bones or disks have been weakened
• Fragments of bone (such as from broken vertebrae, which are the spine bones) in the spinal cord
• Fragments of metal (such as from a traffic accident or gunshot)
• Sideway pulling or pressing or compression from twisting of the head, neck or back during an accident or intense chiropractic manipulation

Bleeding, fluid buildup, and swelling can occur inside or outside the spinal cord (but within the spinal canal). This can press on the spinal cord and damage it.

Most high impact SCIs, such as from motor vehicle accidents or sports injuries, are seen in young, healthy people. Men ages 15 to 35 are most often affected.

Risk factors include:

• Participating in risky physical activities
• Riding in or on high-speed vehicles
• Diving into shallow water

Low impact SCI often occurs in older adults from falls while standing or sitting. Injury is due to a weakened spine from aging or bone loss (osteoporosis).

Symptoms vary, depending on the location of the injury. SCI causes weakness and loss of feeling at, and below the injury. How severe the symptoms are depends on whether the entire cord is severely injured (complete) or only partially injured (incomplete).

An injury at and below the first lumbar vertebra does not cause SCI. But, it may cause cauda equina syndrome. This is an injury to the nerve roots in this area. This is a medical emergency and needs surgery right away.

Injuries of the spinal cord at any level can cause:

• Increased muscle tone (spasticity)
• Loss of normal bowel and bladder control (may include constipation, incontinence, bladder spasms)
• Numbness
• Sensory changes
• Pain
• Weakness, paralysis

CERVICAL (NECK) INJURIES

When spinal cord injuries are in the neck area, symptoms can affect the arms, legs, and middle of the body. The symptoms:

• May occur on 1 or both sides of the body
• Can include breathing problems from paralysis of the breathing muscles, if the injury is high up in the neck

THORACIC (CHEST LEVEL) INJURIES

When spinal injuries are at chest level, symptoms can affect the legs. Injuries to the cervical or high thoracic spinal cord may also result in:

• Blood pressure problems
• Abnormal sweating
• Trouble maintaining normal temperature

LUMBAR SACRAL (LOWER BACK) INJURIES

When spinal injuries are at the lower back level, symptoms can affect one or both legs. Muscles that control the bowels and bladder can also be affected. Spine injuries can damage the spinal cord if they are at the upper portion of the lumbar spine or the nerve roots if they are at the lower lumbar spine.

SCI is a medical emergency that needs medical attention right away.

The health care provider will perform a physical exam, including a brain and nervous system (neurological) exam. This will help identify the exact location of the injury, if it is not known.

Some of the reflexes may be abnormal or missing. Once swelling goes down, some reflexes may slowly recover.

Tests that may be ordered include:

• CT scan or MRI of the spine
• Myelogram (an x-ray of the spine after injecting dye)
• Spine x-rays
• Electromyography (EMG)
• Nerve conduction studies

An SCI needs to be treated right away. The time between the injury and treatment can affect the outcome.

Medicines called corticosteroids are sometimes used to reduce swelling that may damage the spinal cord, though there is no clear evidence that they are useful.

If spinal cord pressure is caused by a growth that can be removed or reduced before the spinal nerves are completely destroyed, paralysis may improve.

Surgery may be needed to:

• Realign the spinal bones (vertebrae)
• Remove fluid or tissue that presses on the spinal cord (decompression laminectomy)
• Remove bone fragments, disk fragments, or foreign objects
• Fuse broken spinal bones or place spinal braces

Bed rest may be needed to allow the bones of the spine to heal.

Spinal traction may be suggested. This can help keep the spine from moving. The skull may be held in place with tongs. These are metal braces placed in the skull and attached to weights or to a harness on the body (halo vest). You may need to wear the spine braces for many months.

The health care team will also tell you what to do for muscle spasms and bowel and bladder dysfunction. They will also teach you how to care for your skin and protect it from pressure sores.

You will probably need physical therapy, occupational therapy, and other rehabilitation after the injury has healed. Rehabilitation will help you cope with the disability from your SCI.

Seek out organizations for additional information on SCI. They can provide support as you recover.

How well a person does depends on the level of injury. Injuries in the upper spine lead to more disability than injuries in the lower spine.

Paralysis and loss of sensation of part of the body are common. This includes total paralysis or numbness, and loss of movement and feeling. Death is possible, especially if there is paralysis of the breathing muscles.

A person who recovers some movement or feeling within 1 week usually has a good chance of recovering more function, although this may take 6 months or more. Losses that remain after 6 months are more likely to be permanent.

Routine bowel care often takes 1 hour or more each day. Most people with SCI must perform bladder catheterization regularly.

The person's home will usually need to be modified.

Most people with SCI are in a wheelchair or need assistive devices to get around.

The following are possible complications of SCI:

• Blood pressure changes that can be extreme (autonomic hyperreflexia)
• Increased risk for injury to numb areas of the body
• Increased risk for urinary tract infections
• Long-term kidney disease
• Loss of bladder and bowel control
• Loss of sexual function
• Paralysis of breathing muscles and limbs (paraplegia, quadriplegia)
• Pressure sores
• Problems due to not being able to move, such as deep vein thrombosis, lung infections, skin breakdown, and muscle stiffness
• Shock

People living at home with SCI should do the following to prevent complications:

• Get lung (pulmonary) care each day (if they need it).
• Follow all instructions for bladder care to avoid infections and damage to the kidneys.
• Follow all instructions for routine wound care to avoid pressure sores.
• Keep immunizations up to date.
• Maintain routine health visits with their doctor.

Call your provider if you have a back or neck injury. Call 911 if you lose movement or feeling. This is a medical emergency.

Managing SCI begins at the site of an accident. Trained paramedics immobilize the injured spine to prevent further nervous system damage.

Someone who may have a SCI should not be moved unless they are in immediate danger.

The following measures may help prevent SCIs:

• Proper safety practices during work and play can prevent many spinal cord injuries. Use protective equipment for any activity in which an injury is possible.
• Diving into shallow water is a major cause of spinal cord trauma. Check water depth before diving, and look for rocks or other possible objects in the way.
• Football and sledding can often involve sharp blows or abnormal twisting and bending of the back or neck, which can cause SCI. Before sledding down a hill, check the area for obstacles. Use the right techniques and equipment when playing football or other contact sports.
• Defensive driving and wearing a seat belt reduces the risk of serious injury if there is a car accident.
• Install and use handrails in the bathroom.
• People who have poor balance may need to use a walker or cane.