A nursing student studying spinal cord injury recognizes all of the following to be causes of secondary injuries:

Choice A reason:

A heart rate of 45 beats/min (bradycardia) is concerning because it indicates a significant impact on the autonomic nervous system, which can occur with high thoracic spinal cord injuries. Bradycardia can lead to inadequate cardiac output and may require immediate intervention to prevent further cardiovascular compromise.

Choice B reason:

An SpO2 of 91% is slightly below normal but not immediately life-threatening. While monitoring and addressing oxygen saturation is important, it is not as critical as the hemodynamic instability indicated by bradycardia in this context.

Choice C reason:

A blood pressure of 98/62 mmHg is on the lower end of the normal range but not immediately alarming. While hypotension is a concern in spinal cord injury patients, the more pressing issue in this scenario is the bradycardia, which can have more immediate and severe consequences.

Choice D reason:

Loss of motor and sensory function in the extremities is a significant finding in spinal cord injuries and indicates the level and severity of the injury. However, it is not immediately life-threatening and does not require as urgent intervention as bradycardia in this acute setting.

Choice A reason:

Autonomic dysreflexia is a serious condition that can occur in individuals with spinal cord injuries, particularly those at or above the T6 level. It is a secondary injury mechanism that results from the autonomic nervous system's abnormal response to stimuli below the level of injury, leading to severe hypertension and other complications.

Choice B reason:

Ischemia, or reduced blood flow, is a common cause of secondary injury following a spinal cord injury. It can result from initial trauma or subsequent swelling and vascular damage, leading to further cell death and tissue damage.

Choice C reason:

Edema, or swelling, is another cause of secondary injury in spinal cord injuries. The inflammatory response to injury can cause fluid accumulation, increasing pressure within the spinal column and exacerbating damage to spinal cord tissues.

Choice D reason:

Axial loading is a primary mechanism of spinal cord injury, not a secondary injury cause. It refers to the vertical force applied along the axis of the spine, typically resulting from falls or direct blows, leading to compression and potential fractures.

Choice E reason:

Hemorrhage, or bleeding, is a significant cause of secondary injury in spinal cord trauma. It can result from blood vessel damage at the injury site, leading to increased pressure, further tissue damage, and impaired blood flow.