The nurse is caring for a client who develops compartment syndrome from a severely fractured arm. The client asks the nurse why this can happen. What is the best response by the nurse?
A.
A bone fragment has injured the nerve supply in the area.
B.
An injured artery causes impaired arterial perfusion through the compartment.
C.
Bleeding and swelling cause increased pressure in an area that cannot expand.
D.
The fascia expands with injury, causing pressure on underlying nerves and muscles
The correct answer and Explanation is :
The correct answer is:
C. Bleeding and swelling cause increased pressure in an area that cannot expand.
Explanation:
Compartment syndrome is a serious condition that occurs when increased pressure within a confined space, usually in the muscles of an arm or leg, compromises circulation and threatens the viability of the tissues within that space. This condition can develop following trauma, such as a fracture, and is considered a surgical emergency.
When a bone is fractured, soft tissues, such as muscles, nerves, and blood vessels, surrounding the fracture site can become damaged. As a result, bleeding, swelling, or both may occur within the muscle compartments. The compartments are enclosed by a non-expandable fascia, which is a strong, connective tissue that cannot stretch easily. Since the fascia is not flexible, any swelling within the compartment causes pressure to build.
This pressure impairs circulation by compressing the blood vessels, which can lead to reduced blood flow (ischemia) to the affected tissues, including muscles and nerves. Without proper blood supply, tissues can become deprived of oxygen and nutrients, leading to cell death and permanent damage. If untreated, compartment syndrome can result in the loss of function, amputation, or even life-threatening complications like infection or kidney failure.
Early signs of compartment syndrome include severe pain, particularly when moving the affected area, and pain disproportionate to the injury. Later signs may include numbness, tingling, pallor, decreased pulses, and paralysis. Immediate treatment involves relieving the pressure, often through a surgical procedure called a fasciotomy, where the fascia is cut open to allow the swelling to expand without causing further damage.
Thus, the most accurate explanation for the client is that the swelling and bleeding increase pressure in a closed space (the compartment), leading to impaired circulation and potential tissue damage.