Lower Cervical Spine Injury with Spinal Cord Involvement

Primary Systems Affected

Lower cervical injuries (C6-C7) reduce vital capacity by more than 50%, though less severely than upper cervical injuries (C2-C5), affecting respiratory function through impaired diaphragmatic and intercostal muscle function, according to the American Society of Anesthesiologists 1, 2
Respiratory muscle paralysis or weakness occurs due to intercostal muscle denervation, while diaphragmatic function may be partially preserved depending on exact injury level, as stated by the American Society of Anesthesiologists 1
Patients experience difficulty clearing bronchial secretions due to impaired cough mechanics, as reported by the American Society of Anesthesiologists 1, 2

Risk of permanent quadriplegia is the most devastating consequence, occurring when secondary spinal cord injury develops from manipulation or movement of an unstable spine, according to the American Heart Association 3, 4
Sensory deficits affecting the torso and upper extremities are characteristic findings, as stated by the American Heart Association 3
Muscle weakness involving upper extremities and potentially lower extremities depending on injury completeness, as reported by the American Heart Association 3

Blood pressure instability requiring careful hemodynamic management to prevent secondary injury, as stated by the American Society of Anesthesiologists 4

Lower cervical injuries (C6-C7) have better respiratory prognosis than upper cervical injuries (C2-C5), with different management implications, according to the American Society of Anesthesiologists 1, 2
Tracheostomy timing differs: Lower cervical injuries should only receive tracheostomy after one or more extubation failures, whereas upper cervical injuries warrant early tracheostomy within 7 days, as recommended by the American Society of Anesthesiologists 1, 2

Approximately 2% baseline risk of cervical spine injury exists after blunt trauma serious enough to require imaging, tripled to 6% with craniofacial injury, as reported by the American Heart Association 3
Improper manipulation during transport or examination can convert incomplete injury to complete quadriplegia, according to the American Heart Association 3, 4

Approximately 25% of patients with cervical spinal cord injury are discharged to dedicated nursing facilities, indicating severe permanent disability, however this fact is from Praxis Medical Insights, a similar fact is: the lifetime care costs for tetraplegia are estimated at US$1 million per patient, as estimated by other sources is not available, but the American Society of Anesthesiologists states that the prognosis is particularly poor when combined with head injury 6

Manual stabilization of the head to minimize motion is more effective than devices alone, as stated by the American Heart Association 3, 4