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
2
Q
What is the 3rd peak of trauma death?
A
days to weaks
- multisystem organ failure
- sepsis
3
Q
What is the most commonly injured organ in blunt trauma?
A
Liver (some say spleen)
4
Q
What is the LD50 fall height?
A
4 stories
5
Q
What is the most commonly injured organ in penetrating trauma?
A
Small bowel (some say liver)
6
Q
What is the most common cause of upper airway obstruction and how is it alleviated?
A
Tongue, jaw thrust (ohhhh yeaaaa)
7
Q
What site is best for cutdown access?
A
Saphenous vein
8
Q
If a pelvic fx is present, where must DPL be performed?
A
Supraumbilical
9
Q
Where does a FAST look for blood?
A
- perihepatic fossa
- Pelvis
- Pericardium
10
Q
CT after blunt trauma needed for what?
A
- Abdominal Pain
- Need for General Anasthesia
- closed head injury
- intoxicants
- paraplegia
- distracting injury
- Hematuria
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
12
Q
Bladder pressures of what indicate abdominal compartment syndrome?
A
> 25-30
13
Q
What causes decreased urine output in abdominal compartment syndrome?
A
Compressed renal vein
14
Q
When do you use a pneumatic antishock garment?
A
- SBP <50 without thoracic injury
- release one compartment at a time after reaching ED
15
Q
Along with catecholamines, what rises after trauma?
A
-ADH
-ACTH
-Glucagon
Fight or flight response
16
Q
Type specific, non-screened, non-crossmatched blood can be given safely with what side effects?
A
effects from antibodies to minor antigens
17
Q
Glasgow coma score verbal
A
5 oriented 4 confused 3 inappropriate words 2 incomprehensible sounds 1 no response
18
Q
GCS that gets head CT, Intubation, ICP monitor
A
<= 8 ICP monitor
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
20
Q
Cerebral contusions can be one of these 2 types
A
coup or contracoup
21
Q
When imaging is best for DAI?
A
MRI better than CT
22
Q
What are signs of elevated ICP?
A
- decreased ventricular size
- loss of sulci
- loss of cisterns
23
Q
What is a normal ICP?
A
-10, >20 needs tx
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
25
What does dilated pupil show?
Temporal pressure on SAME side (CNIII compression)
26
Battle's sign shows what?
middle fossa fx
- acute need exploration
- delayed secondary to edema
27
What is the most common site of facial nerve injury?
geniculate ganglion
28
What is a Jefferson cervical fx?
- C1 burst
- caused by axial loading
- tx rigid collar
29
What are the 3 types of C2 odontoid fx?
I above base, stable
II at base, unstable- need fusion or halo
III extend to vertebral body-need fusion/halo
30
What is the anterior column or thoracolumbar spine?
anterior longitudinal ligament and 1/2 of vertebral body
31
What is the posterior column of the thoracolumbar spine?
facet joints, lamina, spinous processes, interspinous ligament
32
What are wedge fractures? stable or unstable?
anterior column only; stable
33
What structures are at risk after upright fall?
calcaneus
lumbar
wrist/forearm fractures
34
What skull fracture is most common cause of facial nerve injury?
temporal bone FX
35
What is type II Le Fort fx? tx?
- Lateral to nasal bone, underneath eyes, diagonal toward maxilla ( / \ )
- tx with reduction, stabilization, intramaxillary fixation, +/- circumzygomatic and orbital rim suspension wires
36
What is a type III Le Fort Fx? tx?
Lateral orbital walls ( - - )
| -suspension wiring to stable frontal bone; may need external fixation
37
What is the #1 indicator of mandibular injury?
malocclusion
38
what are patients with maxillofacial fx at a high risk for?
cervical spine injury
39
Neck Zone I? penetrating injury gets what?
Clavicle to Cricoid
- angiography
- bronchoscopy
- rigid esophagoscopy
- barium swallow
- may need pericardial window/sternotomy
40
Neck Zone III? Penetrating injury gets what?
Angle of mandible to base of skull
- Angio
- Laryngoscopy
- may need jaw subluxation/digastric SCM release/mastoid sinus resection to reach vascular injuries
41
Contained esophageal injuries treated how?
observation
42
What percentage of esophageal and hypoesophageal injuries leak?
20%. always drain
43
What are the sx of laryngeal fx?
crepitus, stridor, respiratory compromise
44
Tx recurrent laryngeal nerve injury?
repair or reimplant in cricoarytenoid muscle
45
Tx for vertebral artery injury?
ligate or embolize without sequelae
46
When to placed, indications for thoracotomy?
>1500 initially
>250cc/h for 3 h
>2500cc for 24h
>instability
47
unresolved hemothorax after 2 tubes?
thorascopic or open drainage
48
Tracheobronchial injury can be diagnosed by what?
worse oxygenation after chest tube placement
49
What kind of intubation may be needed for bronchial injuries?
mainstem to unaffected side
50
When would you do left thoracotomy for tracheobronchial injury?
-distal left mainstem injuries
51
When would you do right thoracotomy for tracheobronchial injury?
right mainstem, tracheal, proximal left mainstem
| -avoid aorta
52
What side are bronchial injuries more common?
right
53
How large does a sucking chest wound need to be to be significant?
>2/3 diameter of trachea
| -cover wound with dressing that has tape on 2 sides
54
If all blood from hemothorax not drained in _____hours, risk this
48 hours; fibrothorax, pulmonary entrapment, infected hemothorax
55
Common carotid bleeds?
can tx with ligation - 20% will stroke
56
What do fucking shot gun injuries to the neck need other than a pine box?
angiogram, neck CT, esophagus/tracheal evaluation.
57
Tx for thyroid injuries?
control bleeding, drain
58
How do you approach esophageal injuries?
- Neck- left side
- upper 2/3- right thoracotomy
- lower 1/3- left thoracotomy
59
Non-contained injuries to esophagus treated how?
small, <24h old, stable- primary closure
| -otherwise, spit fistula and drain leak with chest tube
60
What is the best method to evaluate esophageal injury?
rigid esophagoscopy and esophogram (95% of injuries found)
61
Neck Zone II? penetrating injury gets what?
Cricoid to angle of the mandible
| -Exploration in the OR
62
Asymptomatic blunt neck trauma gets what?
Neck CT
63
What is a tripod fx? what do you do?
zygomatic bone fx. May need ORIF for cosmesis
64
What are the 2 types of Nosebleeds? Tx?
- Anterior - Packing
| - Posterior - balloon tamponade first, may need embolization of internal maxillary a or ethmoidal a
65
What percentage of nasoethmoidal bone fx have CSF leak?
70%
66
What is type I Le Fort fx? tx?
- maxillary fx straight across ( - )
| - tx with reduction, stabilization, intramaxillary fixation, +/- circumzygomatic and orbital rim suspension wires
67
What are the indications for emergent surgical spine decompression?
- fx not reducible with distraction
- acute anterior spinal syndrome
- open fractures
- soft tissue or bony compression of the cord
- progressive neurological dysfunction
68
What are burst fractures? stable or unstable?
>1 column and usually require fusion
69
How many columns of thoracolumbar spine must be disrupted for fx to be considered unstable?
>1
70
What is the middle column of thoracolumbar spine?
Posterior 1/2 of vertebral body and posterior longitudinal ligament
71
What can facet fractures or disocations cause? how do they happen?
cord injury
| associated with hyperextension and rotation with ligamentous disruption
72
What is a hangman's fx?
-C2
distraction and extension
-traction and halo
73
when do skull fx need treatment?
8-10 mm or > depression
- contaminated
- persistent CSF leak
74
Temporal skull fx can injure what cranial nerves?
VII and VIII
75
Raccoon eyes indicates what?
anterior fossa fx
76
When does ICP peak after injury?
48-72 hours
77
What do you want the CPP to be?
>60
78
When are ICP monitors needed?
- GCS = 8
| - suspected increased ICP and inability to follow clinical exam
79
how do you calculate cerebral perfusion pressure?
MAP minus ICP
80
When do traumatic intraventricular hemorrhages need treatment?
ventriculostomy if causing hydrocephalus
81
Intracerebral hematomas usually where? When do they need operation?
- Usually frontal or temporal
| - operate for significant mass effect
82
Epidural Hematoma caused by damage to what? What does head CT show? What is patient presentation? When do you operate?
- 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
Glasgow coma score eye opening
4 spontaneous
3 to command
2 to pain
1 no response
84
Glasgow coma score Motor
```
6 follows commands
5 localizes pain
4 withdraws from pain
3 flexion with pain
2 extension with pain
1 no response
```
85
What blood type is a universal donor? Why? Rh can and cannot go to who?
- O, does not contain A or B antigens
- Males can get Rh positive
- prepubescent and child bearing age females must get Rh negative
86
When do catecholamines peak after trauma?
24-48 hours
87
What is tx for abdominal compartment syndrome?
decompressive laparotomy
88
What is the final common pathway for decreased cardiac output in abdominal compartment syndrome?
ICV compression
89
When does abdominal compartment syndrome happen?
- massive fluid resuscitation
- trauma
- abdominal surgery
90
What does a CT scan of blunt trauma miss?
- hollow viscous injury
| - retroperitoneal bleed
91
What are flaws with FAST?
- Operator Dependent (fuckin Belsky)
- Obesity
- May not detect fluid <50-80
- Misses retroperitoneal bleed and hollow viscous injury
92
What does a DPL miss?
Retroperitoneal hematoma
| Contained hematomas
93
When is a DPL positive?
>10cc blood
>100k RBC's
-food particles, bile, bacteria
>500cc WBC
94
What injuries to seat belts cause?
- small bowel perfs
- lumbar spine fxs
- Sternal fxs
95
What is the most common cause of long term death with trauma?
Sepsis
96
At what point of blood loss is blood pressure effected?
30%
97
What is the formula for kinetic energy?
1/2 MV^2
98
What percentage of trauma is blunt?
80%
99
What is the first peak of trauma death? causes
0-30 minutes.
- Heart/aorta
- brain/brainstem/spinal cord
- cannot save these patients
