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Orthopedic cast

life science Maturity 11-13 Next article →

An orthopedic cast is a vital medical tool used to stabilize the body. Doctors apply these devices to immobilize bones and soft tissues. This process is necessary after fractures, surgeries, or severe injuries. By restricting movement, a cast provides stability to the affected area. This stability allows bones, ligaments, and tendons to heal in the correct alignment.

Cast Child
Cast Child

Modern medical advances have made these tools more versatile. They can now support both weight-bearing and non-weight-bearing needs.

Upper extremity casts are designed for the arm, wrist, or hand. A long arm cast extends from the upper arm to the wrist. It immobilizes the elbow joint to stabilize forearm fractures or complex tissue damage. Doctors often ensure the elbow stays flexed at about 90 degrees for comfort. In contrast, a short arm cast only covers the wrist and part of the forearm. This design allows the elbow to remain mobile. Some versions include a thumb spica to immobilize the thumb for scaphoid fractures.

legcast1
legcast1

Lower extremity casts focus on the leg and ankle. A long leg cast extends from the upper thigh to the toes. It immobilizes the knee joint along with the lower leg. To promote healing, the knee is usually kept at a slight bend of 20 to 35 degrees. Short leg casts start below the knee and end at the toes. These are used for less severe injuries like ankle fractures. Some short leg casts include a toe plate. This extension shields the toes from external forces and helps maintain bone alignment.

Purple fibreglass full leg cast on right leg
Purple fibreglass full leg cast on right leg

Specialized casts serve very specific medical purposes. A cylinder cast provides focused stabilization for specific regions. In the arm, it may extend from the upper arm to just above the wrist. In the leg, it goes from the thigh to just above the ankle. This allows surrounding joints to remain free. Body casts, or full-body casts, immobilize the trunk. These are used for spinal injuries or congenital deformities. A common type is the body jacket, which uses shoulder straps for stabilization.

fibreglasscast
fibreglasscast

One highly specialized method is the EDF cast. This stands for elongation, derotation, and flexion. It was pioneered by the UK specialist Min Mehta to treat Infantile Idiopathic Scoliosis. Scoliosis is a three-dimensional spinal deformity. The EDF method uses traction to guide spinal growth during development. These casts are tailored to a child's specific anatomy. They often feature a large mushroom-shaped opening to help with chest expansion. A small cutout on the back helps improve rotational correction of the spine.

Spica casts are another complex type of immobilization. A spica cast encases the trunk and one or more limbs. A shoulder spica covers the trunk and one arm. A hip spica is used to treat congenital hip dislocations or femoral fractures. There are several hip spica variants. A single hip spica covers the trunk and one leg. A double hip spica covers the trunk and both legs. A one-and-a-half hip spica covers one leg fully and the other only to the knee.

Plaster of Paris short leg walking cast with toeplate
Plaster of Paris short leg walking cast with toeplate

Recovery often requires help with movement, known as ambulation. If a patient cannot put weight on a limb, they use mobility aids. Crutches, walkers, and wheelchairs are common choices. For better stability, some may use a knee scooter. Some leg casts are designed as walking casts. These have a reinforced, hard, flat under-sole to distribute pressure. This allows the patient to walk while keeping the injury stable.

Short leg cast 20250725
Short leg cast 20250725

Maintaining hygiene is a critical part of wearing a cast. Because many cast materials are non-breathable, moisture can build up. This buildup can cause odors, skin irritation, or fungal growth. Patients must keep the cast completely dry to prevent the material from weakening. Waterproof covers or plastic bags can protect the cast during bathing. It is also important to clean the exposed skin near the edges. However, one must be careful not to let liquids seep inside the device.

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🖼️ Images & Media (12)
File:Cast Child.jpg
Cast Child.jpg
File:Purple_fibreglass_full_leg_cast_on_right_leg.jpg
Purple_fibreglass_full_leg_cast_on_right_leg.jpg
File:Long leg cast.jpg
Long leg cast.jpg
File:legcast1.jpg
legcast1.jpg
File:Plaster of Paris short leg walking cast with toeplate.jpg
Plaster of Paris short leg walking cast...
File:Short leg cast 20250725.jpg
Short leg cast 20250725.jpg
File:Popsheet.JPG
Popsheet.JPG
File:fibreglasscast.JPG
fibreglasscast.JPG
File:FlexiOH_foot_and_ankle_cast.jpg
FlexiOH_foot_and_ankle_cast.jpg
File:Cast off.JPG
Cast off.JPG
File:Hippocrates.jpg
Hippocrates.jpg
File:AnnieCat.jpg
AnnieCat.jpg
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