Autonomic dysreflexia

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Obesity, Sleep & Internal medicine
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Autonomic dysreflexia
Synonyms	Autonomic hyperreflexia
Pronounce	N/A
Specialty	Neurology
Symptoms	Hypertension, bradycardia, headache, sweating, flushing
Complications	Stroke, seizures, retinal detachment
Onset	Sudden
Duration	Variable
Types	N/A
Causes	Spinal cord injury above T6
Risks	Bladder distension, bowel impaction, skin irritation
Diagnosis	Clinical evaluation
Differential diagnosis	Pheochromocytoma, hypertensive crisis
Prevention	Avoidance of triggers
Treatment	Sitting position, nifedipine, nitrates
Medication	Antihypertensives
Prognosis	Good with treatment
Frequency	Common in individuals with spinal cord injury above T6
Deaths	N/A

Autonomic Dysreflexia is a potentially life-threatening medical condition that occurs in individuals with spinal cord injuries, typically above the T6 level. It is characterized by a sudden and uncontrolled increase in blood pressure due to an overreaction of the autonomic nervous system to stimulation below the level of injury. This condition requires immediate medical attention to prevent serious complications, including stroke, seizures, and even death.

Causes

Autonomic dysreflexia is most commonly triggered by stimuli that would not cause discomfort or harm in individuals without spinal cord injury. These triggers include, but are not limited to:

• Bladder distension or irritation, often due to a full bladder or urinary tract infection
• Bowel impaction or irritation
• Skin irritation or pressure sores
• Tight clothing or anything that causes excessive pressure on or below the level of injury

Symptoms

Symptoms of autonomic dysreflexia can vary but typically include:

• Sudden and severe hypertension (high blood pressure)
• Pounding headache
• Flushed face and red blotches on the skin above the level of spinal injury
• Sweating above the level of injury
• Nasal congestion
• Nausea
• A slow heart rate (bradycardia)
• Feeling of apprehension or anxiety

Diagnosis

Diagnosis of autonomic dysreflexia involves recognizing the symptoms and identifying the underlying cause. Healthcare providers will also review the patient's medical history and perform a physical examination. In some cases, additional tests may be required to rule out other conditions that could cause similar symptoms.

Treatment

The primary goal in treating autonomic dysreflexia is to identify and remove the triggering stimulus. Treatment strategies include:

• Immediate elevation of the head and upper body to lower blood pressure
• Loosening tight clothing and removing any constrictive items
• Catheterization to relieve bladder distension
• Bowel management to relieve constipation or impaction
• Administration of antihypertensive medications to lower blood pressure if non-invasive measures are not effective

Prevention

Preventing autonomic dysreflexia involves regular and careful monitoring for potential triggers, especially for individuals with a history of the condition. Preventative measures include:

• Regular bladder and bowel management
• Routine skin inspection and care to prevent pressure sores
• Education for patients, families, and caregivers about the signs, symptoms, and management of autonomic dysreflexia

Complications

If not promptly treated, autonomic dysreflexia can lead to severe complications, including:

• Stroke
• Seizures
• Cardiac arrest
• Death

Conclusion

Autonomic dysreflexia is a serious condition that requires immediate medical attention. With proper management and preventative measures, individuals with spinal cord injuries can reduce their risk of experiencing this potentially life-threatening condition.

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