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Fiser ABSITE Review + Decker + TrueLearn > Chapter 15 - Trauma > Flashcards

Chapter 15 - Trauma Flashcards

1
Q

What is the second peak of trauma death? causes

A

30 minutes- 4 hours. -#1 head injury -#2 hemorrhage -Golden hour, rapid assessment

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2
Q

What is the 3rd peak of trauma death?

A

days to weaks -multisystem organ failure -sepsis

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3
Q

What is the most commonly injured organ in blunt trauma?

A

Liver (some say spleen)

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4
Q

What is the LD50 fall height in stories?

A

4 stories

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5
Q

What is the most commonly injured organ in penetrating trauma?

A

Small bowel (some say liver)

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6
Q

What is the most common cause of upper airway obstruction and how is it alleviated?

A

Tongue, jaw thrust (ohhhh yeaaaa)

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7
Q

What site is best for cutdown access?

A

Saphenous vein

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8
Q

If a pelvic fx is present, where must DPL be performed?

A

Supraumbilical

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9
Q

Where does a FAST look for blood?

A

-perihepatic fossa -perisplenic fossa -Pelvis -Pericardium

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10
Q

CT after blunt trauma needed for what?

A

-Abdominal Pain -Need for General Anasthesia -closed head injury -intoxicants -paraplegia -distracting injury -Hematuria

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11
Q

These patients need a laparotomy after blunt trauma:

A

-Peritonitis -evisceration -(+) DPL -clinical deterioration -uncrontrolled hemorrhage -free air -diaphragm injury -intraperitoneal bladder injury -specific renal, pancreas, biliary tract injury

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12
Q

Bladder pressures of what indicate abdominal compartment syndrome?

A

>25-30

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13
Q

What causes decreased urine output in abdominal compartment syndrome?

A
  • compressed renal vein
  • sympathetics also cause renal artery vasoconstriction
  • Consequently the RAAS system is activated. Kidney behaves as if pre-renal, so urine sodium/chloride are decreased.
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14
Q

When do you use a pneumatic antishock garment?

A

There is no evidence to suggest that MAST/PASG application reduces mortality, length of hospitalisation or length of ICU stay in trauma patients and it is possible that it may increase these. These data do not support the continued use of MAST/PASG in the situation described. However, it should be recognised that, due to the poor quality of the trials, conclusions should be drawn with caution.

Study: Medical anti-shock trousers (pneumatic anti-shock garments) for circulatory support in patients with trauma.

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15
Q

Along with catecholamines, what rises after trauma?

A

-ADH -ACTH -Glucagon Fight or flight response

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16
Q

Type specific, non-screened, non-crossmatched blood can be given safely with what side effects?

A

effects from antibodies to minor antigens

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17
Q

Glasgow coma score verbal

A

5 oriented 4 confused 3 inappropriate words 2 incomprehensible sounds 1 no response

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18
Q

GCS that gets head CT, Intubation, ICP monitor

A

<= 8 ICP monitor

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19
Q

Subdural Hematoma caused by damage to what? Head CT shows? when do you operate?

A

-venous plexus tearing between dura and arachnoid -CT shows crescent deformity -operate for significant mass defect

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20
Q

Cerebral contusions can be one of these 2 types

A

coup or contracoup

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21
Q

When imaging is best for DAI?

A

MRI better than CT

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22
Q

What are imaging signs of elevated ICP?

A

Decreased ventricular size, loss of sulci, loss of cisterns

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23
Q

What is a normal ICP?

A

-10, >20 needs tx

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24
Q

What is supportive therapy for increased ICP?

A
  • sedation and paralysis
  • raise head of bed
  • relative hyperventilation
  • Na 140-150
  • Serum Osm 295-310
  • Manitol
  • Barbituate coma
  • ventriculostomy with CSF drainage
  • Phenytoin/Keppra
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25
Q

What does dilated pupil show?

A

Temporal pressure on SAME side (CNIII compression)

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26
Q

Battle’s sign shows what?

A
  • middle fossa fx
  • acute may need exploration
  • delayed secondary to edema
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27
Q

What is the most common site of facial nerve injury?

A

geniculate ganglion

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28
Q

What is a Jefferson cervical fx?

A
  • C1 burst
  • caused by axial loading
  • tx rigid collar
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29
Q

What are the 3 types of C2 odontoid fx?

A

Flexion or extension of the head in an AP orientation (ie, sagittal plane), as occur with a forward fall onto the forehead, may result in a fx of the odontoid process (dens). Fxs can occur above the transverse ligaments (type I) or, most commonly, at the base of the odontoid process where it attaches to C2 (type II).

  • Type I fractures are stable. Although spinal cord injury is uncommon
  • Type II odontoid fractures are unstable and complicated by nonunion in over 50 percent
    • treated with halo vest immobilization
  • Type III fractures are unstable since they allow the odontoid and the occiput to move as a unit
    • ​Angulation of the force results in extension of through the upper portion of the body of C2
  • Best seen on the AP odontoid radiograph (ie, open-mouth view)
    • Cause prevertebral soft tissue swelling on lateral radiographs
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30
Q

What is the anterior column of thoracolumbar spine?

A

anterior longitudinal ligament and 1/2 of vertebral body

where wedge fractures occur

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31
Q

What is the posterior column of the thoracolumbar spine?

A

facet joints, lamina, spinous processes, interspinous ligament

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32
Q

What are wedge fractures? stable or unstable?

A

anterior column only; stable

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33
Q

What bones are at risk after upright fall?

A
  • calcaneus
  • lumbar spine
  • wrist/forearm fractures
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34
Q

What skull fracture is most common cause of facial nerve injury?

A

temporal bone FX

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35
Q

What is type II Le Fort fx? tx?

A

Lateral to nasal bone, underneath eyes, diagonal toward maxilla ( / \ )

Tx with reduction, stabilization, intramaxillary fixation, +/- circumzygomatic and orbital rim suspension wires

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36
Q

What is a type III Le Fort Fx? tx?

A

Lateral orbital walls ( - - ) -suspension wiring to stable frontal bone; may need external fixation

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37
Q

What is the #1 indicator of mandibular injury?

A

malocclusion

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38
Q

What are patients with maxillofacial fx at a high risk for?

A

cervical spine injury

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39
Q

Neck Zone I? penetrating injury gets what?

A

Clavicle to Cricoid

  • angiography
  • bronchoscopy
  • rigid esophagoscopy
  • barium swallow
  • may need pericardial window/sternotomy
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40
Q

Neck Zone III? Penetrating injury gets what?

A

Angle of mandible to base of skull

  • Angio
  • Laryngoscopy
  • may need jaw subluxation/digastric SCM release/mastoid sinus resection to reach vascular injuries
41
Q

Contained esophageal injuries treated how?

A

Observation

Criteria: early diagnosis or delayed diagnosis with contained leak, perforation not in the abdomen, contained perforation in the mediastinum, content of the perforation draining back to the esophagus, perforation does not involve neoplasm or obstruction of the esophagus, absence of sepsis, presence of experienced thoracic surgeon and contrast imaging in the hospital.

Nonoperative treatment includes large bore intravenous access, supplemental oxygen and cardiopulmonary monitoring in a critical care setting. Patient should be kept nil per oral and should have a nasogastric tube placed to clear gastric contents and limit further contamination. Broad spectrum intravenous antibiotics should be instituted as early as possible and should be given for minimum of 7 – 10 days.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5139851/

42
Q

What percentage of esophageal and hypoesophageal injuries leak?

A

20%. always drain

43
Q

What are the sx of laryngeal fx?

A

crepitus, stridor, respiratory compromise

44
Q

Tx recurrent laryngeal nerve injury?

A

repair or reimplant in cricoarytenoid muscle

45
Q

Tx for vertebral artery injury?

A

ligate or embolize without sequelae

46
Q

When chest tube placed, indications for thoracotomy?

A
  • >1500 initially
  • >250cc/h for 3 h
  • >2500cc for 24h
  • instability
47
Q

unresolved hemothorax after 2 tubes?

A

thorascopic or open drainage

48
Q

Tracheobronchial injury can be suspected and diagnosed by?

A

Intrathoracic injury can be subtle and indolent, presenting with retained secretions, recurrent pneumothoraces, and obstruction. The sine qua non of intrathoracic tracheobronchial injury is a significant air leak and pneumothorax or pneumomediastinum that reaccumulates despite tube thoracostomy. A cervical injury may present without a significant air leak, if the tear or rupture is contained by the adventitia. Signs of cervical tracheal injury include dyspnea, hoarseness, and subcutaneous emphysema.

Radiographs generally reveal marked air in local soft tissue (ie, subcutaneous emphysema). Fractures of the first three ribs are associated with intrathoracic injury. Other radiologic findings on plain film include: persistent pneumothorax with a dependent lung, interstitial air in the wall of the trachea or mainstem bronchus, abnormal location of the endotracheal tube (ETT), and a distended ETT cuff due to protrusion of the trachea.

DX: operating room or by bronchoscopy. Multidetector CT scan (MDCT) enables diagnosis of some tracheal tears, but its sensitivity is unknown. If tracheobronchial injury is suspected, obtain a MDCT or consult a thoracic surgeon for evaluation and possible bronchoscopy.

TX: primary repair or possible lung resection. The need for surgical repair is generally based on the risk for airway obstruction, massive air leak, or mediastinitis.

Tracheobronchial injuries occur in less than 1 percent of patients with blunt thoracic trauma, and few studies exist to guide diagnosis and management. Most patients who sustain such injuries die at the scene. The trachea is protected from injury by its position relative to the mandible, sternum and vertebral column, and its relative elasticity. Injury of the cervical trachea is uncommon but can occur from a direct blow, which may be of low energy; injury of the intrathoracic trachea results from high-energy trauma, generally motor vehicle collisions (MVCs) and sometimes crush injuries. Most tracheal or bronchial injuries occur as part of multiple trauma, including additional injuries to the lungs and chest wall. The right main bronchus is involved most often, generally within 1 to 2 cm of the carina, followed by the left main bronchus.

https://www.uptodate.com/contents/initial-evaluation-and-management-of-blunt-thoracic-trauma-in-adults?search=tracheobronchial%20injury&sectionRank=1&usage_type=default&anchor=H26&source=machineLearning&selectedTitle=1~134&display_rank=1#H26

49
Q

What kind of intubation may be needed for bronchial injuries?

A

mainstem to unaffected side

50
Q

When would you do left thoracotomy for tracheobronchial injury?

A

-distal left mainstem injuries

51
Q

When would you do right thoracotomy for tracheobronchial injury?

A

right mainstem, tracheal, proximal left mainstem -avoid aorta

52
Q

What side are bronchial injuries more common?

A

right

53
Q

How large does a sucking chest wound need to be to be significant?

A

>2/3 diameter of trachea -cover wound with dressing that has tape on 2 sides

54
Q

If all blood from hemothorax not drained in _____hours, risk this

A

48 hours; fibrothorax, pulmonary entrapment, infected hemothorax

55
Q

Common carotid bleed mgmt?

A

can tx with ligation - 20% will stroke

56
Q

What do shot gun injuries to the neck need other than a pine box?

A

angiogram, neck CT, esophagus/tracheal evaluation.

57
Q

Tx for thyroid injuries?

A

control bleeding, drain

58
Q

What is the approach for esophageal injuries?

A
  • neck - left side
  • upper 2/3 - right thoracotomy
  • lower 1/3 - left thoracotomy
59
Q

Non-contained injuries to esophagus treated how?

A

small, <24h old, stable - primary closure

otherwise, spit fistula and drain leak with chest tube

60
Q

What is the best method to evaluate esophageal injury?

A

rigid esophagoscopy and esophogram (95% of injuries found)

61
Q

Neck Zone II? penetrating injury gets what?

A

Cricoid to angle of the mandible -Exploration in the OR

62
Q

Asymptomatic blunt neck trauma gets what?

A

Neck CT

63
Q

What is a tripod fx? what do you do?

A

zygomatic bone fx. May need ORIF for cosmesis

64
Q

What are the 2 types of Nosebleeds? Tx?

A
  • Anterior - Packing
  • Posterior - balloon tamponade first, may need embolization of internal maxillary a or ethmoidal a
65
Q

What percentage of nasoethmoidal bone fx have CSF leak?

A

70%

66
Q

What is type I Le Fort fx? tx?

A
  • maxillary fx straight across ( - )
  • tx with reduction, stabilization, intramaxillary fixation, +/- circumzygomatic and orbital rim suspension wires
67
Q

What are the indications for emergent surgical spine decompression?

A
  • fx not reducible with distraction
  • acute anterior spinal syndrome
  • open fractures
  • soft tissue or bony compression of the cord
  • progressive neurological dysfunction
68
Q

What are burst fractures? stable or unstable?

A

>1 column and usually require fusion

69
Q

How many columns of thoracolumbar spine must be disrupted for fx to be considered unstable?

A

>1

70
Q

What is the middle column of thoracolumbar spine?

A

Posterior 1/2 of vertebral body and posterior longitudinal ligament

71
Q

What can facet fractures or disocations cause? how do they happen?

A

cord injury associated with hyperextension and rotation with ligamentous disruption

72
Q

What is a hangman’s fx?

A
  • C2 distraction and extension
  • traction and halo
73
Q

when do skull fx need treatment?

A
  • 8-10 mm or > depression
  • contaminated
  • persistent CSF leak
74
Q

Temporal skull fx can injure what cranial nerves?

A

VII and VIII

75
Q

Raccoon eyes indicates what?

A

anterior fossa fx

76
Q

When does ICP peak after injury?

A

48-72 hours

77
Q

What do you want the CPP to be?

A

>60

78
Q

When are ICP monitors needed?

A

GCS = 8, suspected increased ICP, and inability to follow clinical exam

79
Q

how do you calculate cerebral perfusion pressure?

A

MAP minus ICP

80
Q

When do traumatic intraventricular hemorrhages need treatment?

A

ventriculostomy if causing hydrocephalus

81
Q

Intracerebral hematomas usually where? When do they need operation?

A

-Usually frontal or temporal -operate for significant mass effect

82
Q

Epidural Hematoma caused by damage to what? What does head CT show? What is patient presentation? When do you operate?

A

-Arterial bleed from middle meningeal A -CT shows lens shape lenticular deformity -initial LOC, lucid interval, sudden deterioration -Operate for significant degeneration or mass effect shift >5mm

83
Q

Glasgow coma score eye opening

A

4 spontaneous 3 to command 2 to pain 1 no response

84
Q

Glasgow coma score Motor

A

6 follows commands 5 localizes pain 4 withdraws from pain 3 flexion with pain 2 extension with pain 1 no response

85
Q

What blood type is a universal donor? Why? Rh can and cannot go to who?

A

-O, does not contain A or B antigens -Males can get Rh positive -prepubescent and child bearing age females must get Rh negative

86
Q

When do catecholamines peak after trauma?

A

24-48 hours

87
Q

What is tx for abdominal compartment syndrome?

A

decompressive laparotomy

88
Q

What is the final common pathway for decreased cardiac output in abdominal compartment syndrome?

A

ICV compression

89
Q

When does abdominal compartment syndrome happen?

A

-massive fluid resuscitation -trauma -abdominal surgery

90
Q

What does a CT scan of blunt trauma miss?

A

-hollow viscous injury -retroperitoneal bleed

91
Q

What are flaws with FAST?

A

-Operator Dependent (fuckin Belsky) -Obesity -May not detect fluid <50-80 -Misses retroperitoneal bleed and hollow viscous injury

92
Q

What does a DPL miss?

A

Retroperitoneal hematoma Contained hematomas

93
Q

When is a DPL positive?

A

>10cc blood >100k RBC’s -food particles, bile, bacteria >500cc WBC

94
Q

What injuries to seat belts cause?

A

-small bowel perfs -lumbar spine fxs -Sternal fxs

95
Q

What is the most common cause of long term death with trauma?

A

Sepsis

96
Q

At what point of blood loss is blood pressure effected?

A

30%

97
Q

What is the formula for kinetic energy?

A

1/2 MV^2

98
Q

What percentage of trauma is blunt?

A

80%

99
Q

What is the first peak of trauma death? causes

A

0-30 minutes. -Heart/aorta -brain/brainstem/spinal cord -cannot save these patients

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