The nurse is caring for an older adult who is confused and restless. The nurse reviews the patient's history and recent complete blood count (CBC). Which finding may best explain the patient's confusion and restlessness?

Choice A reason: Assessment of arms and legs movement is an important part of the neurological assessment, but it is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. This level of injury affects the phrenic nerve, which controls the diaphragm and breathing. The patient may have difficulty breathing or require mechanical ventilation.

Choice B reason: Evaluation of knee jerk reflex is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The knee jerk reflex is controlled by the spinal cord segments L2-L4, which are below the level of injury. The patient may have normal or exaggerated reflexes, depending on the extent of the spinal cord damage.

Choice C reason: Measurement of vital signs is a routine part of the nursing care, but it is not the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The patient may have abnormal vital signs due to the injury, such as low blood pressure, slow heart rate, or irregular temperature. However, these are not as life-threatening as respiratory failure.

Choice D reason: Evaluation of respiratory status is the critical focus of care for a patient with a spinal cord injury at the cervical 5 vertebra. The patient is at high risk of respiratory compromise due to the impairment of the phrenic nerve and the diaphragm. The nurse should monitor the patient's oxygen saturation, respiratory rate, depth, and rhythm, and provide oxygen therapy or mechanical ventilation as needed. The nurse should also assess the patient for signs of respiratory infection, such as fever, cough, or sputum.

Choice A reason: The disorder is commonly fatal, is not a true statement. Guillain-Barre syndrome is a rare and serious condition that affects the peripheral nervous system. It causes inflammation and damage to the nerve fibers, leading to muscle weakness, numbness, and paralysis. However, most people recover from Guillain-Barre syndrome, although some may have long-term complications or disabilities. The mortality rate is about 4% to 7%.

Choice B reason: The progressive muscle weakness will begin in the lower extremities and move upward, is a true statement. Guillain-Barre syndrome usually starts with tingling and weakness in the feet and legs, and then spreads to the arms and upper body. This pattern of weakness is called ascending paralysis, and it can affect the breathing, swallowing, and facial muscles. The weakness usually reaches its peak within two to four weeks, and then gradually improves over months or years.

Choice C reason: The disorder is caused by a fungal infection, is not a true statement. Guillain-Barre syndrome is not caused by a fungal infection, but by an abnormal immune response. The exact cause of Guillain-Barre syndrome is unknown, but it is often preceded by an infection, such as a respiratory or gastrointestinal infection, or a vaccination. The immune system mistakenly attacks the nerve fibers, causing inflammation and damage.

Choice D reason: The disorder's most significant manifestations are muscle pain and stiffness, is not a true statement. Guillain-Barre syndrome's most significant manifestations are muscle weakness and paralysis, not pain and stiffness. Muscle pain and stiffness may occur in some cases, but they are not the main symptoms or the most serious ones. The weakness and paralysis can affect the vital functions, such as breathing, blood pressure, and heart rate, and require intensive care and treatment.