Face and Neck Injuries Flashcards
Function of hyoid bone
Supports and stabilizes larynx and serves as a point of attachment for many neck and tongue muslces.
Which nerve carries parasympathetic nerve fibers that cause constriction of pupils?
Oculomotor nerve
Which nerve provides the sense of vision?
Optic nerve
How does the eyeball keep its global shape?
Pressure of fluid contained within anterior and posterior chamber.
Aqueous humor
Clear watery fluid filling anterior chamber of eyeball.
Loss of aqueous humor will gradually replenish.
Vitreous humor
Jellylike substance in posterior chamber.
Maintains shape of globe.
Loss of vitreous humor will cause blindness as it cannot be replenished.
What is the external ear compose of?
Pinna and external auditory canal
What does the middle ear contain?
Three bones - malleus, icus, and stapes. Move in response to sound waves hitting the TM.
What is the inner ear composed of?
Bony chambers filled with fluid
Injury to major vessels in the neck can cause :
Cerebral hypoxia
Infarct
Air embolism
Permanent neurologic impairment
s/s of facial fx
Ecchymosis Swelling TTP Crepitus Misalignment of the teeth, facial deformities or asymmetry Instability of facial bones Impaired ocular movement Visual disturbances
Nasal fx are characterized by :
swelling, tenderness, and crepitus when palpated
Anterior or posterior epistaxis
Deformity of the nose usually appears as ____ displacement.
lateral
When should you suspect a mandibular fx?
Hx of blunt force trauma to lower third of face
Dental malocculsion
Numbness of the chine
Inability to open mouth
Maxillary fx are most commonly associated with which MOI?
Massive blunt force trauma such as MVCs, falls, and assaults
Signs of maxillary fx
Facial swelling
Instability of midfacial bones
Malocculsion
Elongated face
Le Fort I fx
Horizontal fx of maxilla that separates the hard palate and lower maxilla from skull.
Le Fort II fx
Separates nasal bone and lower maxilla from skull and cranial bones.
Le Fort III fx
All midfacial bones, separating the entire midface from cranium.
Orbital fx sxs
Diplopia
Loss of sensation above the eyebrow or cheek
Paralysis of upward gaze
Massive nasal discharge
Signs of zygomatic fx
Side of face appears flattened
Loss of sensation over cheek, nose, and upper lip
Paralysis of upward gaze
When do zygomatic fx commonly result?
Blunt trauma in MVCs and assaults
Common MOI for face and neck injuries include :
MVCs, sports, falls, penetrating trauma, and blunt trauma
Provide rapid transport for :
Signs of shock Poor general impression AMS Abnormal vital signs Dyspnea Severe pain Isolated injuries to the eye