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Crush syndrome, also known as traumatic rhabdomyolysis, is a medical condition that occurs following a crushing injury to skeletal muscles. It is characterised by severe shock and kidney failure, and can ultimately lead to death. The syndrome was first described in 1941 by British physician Eric Bywaters, who studied patients during the wartime bombing of London. Rhabdomyolysis is a rare injury where muscle tissue breaks down, causing muscle death and releasing toxic components into the body. This can lead to kidney damage and even failure.
| Characteristics | Values |
|---|---|
| Definition | Crush syndrome is a medical condition characterized by major shock and kidney failure after a crushing injury to skeletal muscle. |
| Cause | Prolonged continuous pressure on muscular tissue. |
| Symptoms | Weak and sore muscles, muscle stiffness, swollen limbs, dark urine, change in urine colour, local tissue injury, organ dysfunction, metabolic abnormalities, neurological disturbances, cardiac rhythm alteration, shock, respiratory gas exchange issues, etc. |
| Treatment | Oral or intravenous fluids, antibiotics, tetanus toxoid, ice application, oxygen, haemodialysis, hyperbaric oxygen therapy, etc. |
| Prevention | Use of a tourniquet, early and consistent treatment, etc. |
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Crush syndrome
The syndrome was first reported by Japanese physician Seigo Minami in 1923, who studied the pathology of three soldiers who died during World War I due to kidney failure caused by a buildup of excess myoglobin. It was later described by British physician Eric Bywaters during World War II, in patients trapped under rubble during the 1941 bombing of London (the Blitz).
The release of muscle cell contents, including myoglobin, potassium, phosphate, and other toxic substances, into the circulation leads to systemic effects such as reperfusion syndrome and renal failure. The most devastating systemic effects can occur when the crushing pressure is suddenly released, causing sudden reoxygenation in the limbs and extremities. This can lead to "smiling death," where a patient who seemed cheerful during recovery suddenly dies shortly afterward.
Treatment for crush syndrome focuses on preventing kidney failure by rehydrating the patient and making urine more alkaline. Early detection, adequate fluid support, and renal replacement therapy are crucial. In some cases, amputation of severely crushed limbs may be necessary to prevent the syndrome.
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Crush injury
A crush injury occurs when excessive force or pressure is applied to a body part, often when that body part is squeezed between two heavy objects. This type of injury is common in disasters such as earthquakes, hurricanes, bombings, and other large-scale events, and can result from structural collapse. Typically affected areas of the body include the lower extremities (74%), upper extremities (10%), and trunk (9%).
Crush injuries cause compression of the body's extremities or other parts, leading to muscle swelling and neurological disturbances in the affected areas. This is caused by the release of muscle cell contents, including myoglobin, urate, potassium, phosphate, sodium, calcium, and water, into the circulation. As a result of this release, the muscle cells swell, causing a secondary elevation in compartment pressure.
Crush syndrome, on the other hand, is a localized crush injury with systemic manifestations. It is characterised by major shock and kidney failure after a crushing injury to skeletal muscle. It is caused by reperfusion injury, which appears after the release of crushing pressure, and can lead to lethal cardiac arrhythmias. The sudden release of toxins from necrotic muscle into the circulatory system leads to myoglobinuria, which causes renal failure if untreated.
Treatment for crush injuries includes applying ice to the injured areas and monitoring for symptoms such as pain, pallor, paresthesias, pain with passive movement, and pulselessness. It is important to prevent renal failure with appropriate hydration, using intravenous fluids and mannitol to maintain diuresis. Alkalinization of urine is critical to prevent myoglobin and uric acid deposition in the kidneys.
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Rhabdomyolysis
The symptoms of rhabdomyolysis depend on its severity and whether kidney failure develops. Mild forms may not cause any muscle symptoms, while more severe cases are characterised by muscle pain, tenderness, weakness, and swelling of the affected muscles. Other symptoms include vomiting, confusion, and an irregular heartbeat. Diagnosis is based on abnormal blood tests, particularly elevated creatine kinase (CK) levels, and discoloured urine.
Treatment for rhabdomyolysis focuses on managing the airway, breathing, and circulation, as well as preserving renal function through rehydration. Immediate treatment is crucial to prevent permanent kidney damage. In some cases, kidney dialysis and medications such as diuretics and bicarbonate may be required.
Crush syndrome, also known as traumatic rhabdomyolysis, is a condition characterised by major shock and kidney failure after a crushing injury to skeletal muscle. It is caused by prolonged continuous pressure on muscular tissue, resulting in reperfusion injury when the pressure is released. The systemic effects of crush syndrome are due to the release of toxins such as myoglobin, urate, potassium, and phosphate into the circulation.
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Compartment syndrome
Crush syndrome is a medical condition characterised by major shock and kidney failure after a crushing injury to skeletal muscle. It is caused by prolonged continuous pressure on muscular tissue, resulting in traumatic rhabdomyolysis. Rhabdomyolysis is the breakdown of skeletal muscle damaged by ischemic conditions, which can lead to acute kidney injury (AKI).
The symptoms of acute compartment syndrome include intense pain, swollen and visibly bulging muscles. It is often caused by severe injuries such as car accidents, falls from high places, bone fractures, and crushing injuries. In contrast, chronic compartment syndrome can usually be treated by adjusting one's workout routine.
Crush syndrome was first described by Seigo Minami, a Japanese physician, in 1923. He studied the pathology of soldiers who died during World War I due to kidney failure caused by the buildup of excess myoglobin. The syndrome was later documented by British physician Eric Bywaters during the 1941 bombing of London.
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Treatment
Crush syndrome is a medical condition that occurs when a person's muscles are crushed, resulting in major shock and kidney failure. It is often the result of catastrophes such as earthquakes, where individuals are trapped under rubble or moving masonry. This is distinct from a crush injury, which is the compression of body parts like arms and legs, causing muscle swelling and neurological disturbances.
- Prevention of Kidney Failure: Rehydration is crucial to prevent kidney failure (renal failure). Intravenous access with warm Normal Saline is recommended to prevent and treat metabolic acidosis, improve coagulation, and prevent kidney failure. Fluids should be administered based on the patient's electrolyte levels, arterial blood gases, and muscle enzymes.
- Addressing Systemic Manifestations: Crush syndrome can lead to local tissue injury, organ dysfunction, and metabolic abnormalities. These include acidosis, hyperkalemia (high potassium levels), and hypocalcemia (low calcium levels). Treatment involves addressing these abnormalities and providing supportive care. Oxygen therapy and breathing support may be required.
- Pain Management: Crush syndrome can cause severe pain. Appropriate pain management is essential to ensure patient comfort.
- Intensive Care and Monitoring: Patients with crush syndrome often require admission to an intensive care unit, preferably with expertise in trauma medicine. Even if patients seem stable, close observation is necessary to monitor for potential complications.
- Wound Care: Open wounds should be treated surgically, including debridement, antibiotics, and tetanus prophylaxis. Ice can be applied to injured areas to reduce inflammation and pain.
- Amputation: While all attempts should be made to preserve the crushed limb, amputation may be necessary as a last resort to save the patient's life.
- Early Intervention: Early and consistent intervention is critical to reducing the rate of pathology progression and preventing further complications.
- Haemodialysis: Haemodialysis has been used as a primary treatment modality in some cases of crush syndrome.
- Tourniquet Application: In cases where the patient has been trapped for more than two hours, a tourniquet can be used to stall the life-threatening consequences of the injury.
- Fluid Overload: Careful fluid overload is important, especially if the patient has been trapped for more than one hour. Intravenous sodium bicarbonate administration can be beneficial.
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Frequently asked questions
A crushed muscle is a muscle that has been physically crushed by something heavy.
Crush syndrome is a medical condition characterised by major shock and kidney failure after a crushing injury to skeletal muscle. It is also known as traumatic rhabdomyolysis.
Symptoms of crush syndrome include swollen limbs, weak and sore muscles, dark urine, and renal failure.
Treatment for crush syndrome focuses on preventing kidney failure by rehydrating the patient and making urine more alkaline.
