2. Mechanisms of Injury
ďŽ Blunt Trauma
⢠Compression Forces
ďŽ Cells in tissues are compressed and crushed
ďŽ E.g. Spleen
⢠Shear Forces
ďŽ Acceleration/Deceleration Injury
ďŽ E.g. Aorta
⢠Shearing force = Spectrum from Full thickness tear
(Exsanguination) to Partial tear (Pseudoaneurysm)
⢠Overpressure
ďŽ Body cavity compressed at a rate faster than the tissue
around it, resulting in rupture of the closed space
ďŽ E.g. Plastic bag
ďŽ E.g. in trauma = diaphragmatic rupture, bladder injury
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
3. Primary Survey
ďŽAirway and Protection of Spinal Cord
ďŽBreathing and Ventilation
ďŽCirculation
ďŽDisability
ďŽExposure and Control of the
EnvironmentGhana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
4. Primary Survey
ďŽ Key Principles
⢠When you find a problem during the
primary survey, FIX IT.
⢠If the patient gets worse, restart from the
beginning of the primary survey
⢠Some critical patients in the Emergency
Department may not progress beyond the
primary survey
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
5. Ghana Emergency Medicine
Collaborative
Initial management (resuscitation) must be prioritised according to the
physiological needs for survival. In the âA,B,C,D,Eâ of resuscitation, the âAâ
comes before the âBâ, the âBâ before âCâ and so on. A problem identified at
any step must be corrected immediately before moving to the next step.
Please note that there is an exception to this rule
A A patent Airway
B Effective Breathing / Ventilation
C Adequate Circulation and haemorrhage control
D Neurological Disability
E Adequate Exposure to search for other injuries
Take home message!
Making a definitive diagnosis is the least important issue at this stage
During the primary survey life threatening conditions are identified and
management is instituted SIMULTANEOUSLY.
6. Airway and Protection of Spinal Cord
ďŽ Why first in the algorithm?
⢠Loss of airway can result in death in < 3 minutes
⢠Prolonged hypoxia = Inadequate perfusion, End-organ damage
ďŽ Airway Assessment
⢠Vital Signs = RR, O2 sat
⢠Mental Status = Agitation, Somnolent, Coma
⢠Airway Patency = Secretions, Stridor, Obstruction
⢠Traumatic Injury above the clavicles
⢠Ventilation Status = Accessory muscle use, Retractions,
Wheezing
ďŽ Clinical Pearls
⢠Patients who are speaking normally generally do not have a
need for immediate airway management
⢠Hoarse or weak voice may indicate a subtle tracheal or
laryngeal injury
⢠Noisy Respirations frequently indicates an obstructed
respiratory pattern
8. Protection of Spinal Cord
ďŽ General Principle: Protect the entire spinal cord until injury has
been excluded by radiography or clinical physical exam in
patients with potential spinal cord injury.
ďŽ Spinal Protection
⢠Rigid Cervical Spinal Collar = Cervical Spine
⢠Long rigid spinal board or immobilization on flat surface such as
stretcher = T/L Spine
ďŽ Clinical Pearls
⢠Treatment (Immobilization) before diagnosis
⢠Return head to neutral position
⢠Do not apply traction
⢠Diagnosis of spinal cord injury should not precede resuscitation
⢠Motor vehicle crashes and falls are most commonly associated with
spinal cord injuries
⢠Main focus = Prevention of further injury
10. Breathing and Ventilation
ďŽ General Principle: Adequate gas exchange is required to
maximize patient oxygenation and carbon dioxide elimination
ďŽ Breathing/Ventilation Assessment:
⢠Exposure of chest
⢠General Inspection
ďŽ Tracheal Deviation
ďŽ Accessory Muscle Use
ďŽ Retractions
ďŽ Absence of spontaneous breathing
ďŽ Paradoxical chest wall movement
⢠Auscultation to assess for gas exchange
ďŽ Equal Bilaterally
ďŽ Diminished or Absent breath sounds
⢠Palpation
ďŽ Deviated Trachea
ďŽ Broken ribs
ďŽ Injuries to chest wall
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
11. Ghana Emergency Medicine
Collaborative
⢠Observe the respiratory rate and effort of the patient. Assess the use
of accessory respiratory muscles.
⢠Palpate the neck carefully for tracheal deviation.
⢠Identify emphysema (air in the subcutaneous tissue) by palpating
the chest wall for crepitation (a crackling feeling)
⢠Place your hands in the patientâs axillae and gently compress the
chest. Tenderness and emphysema suggest chest trauma.
⢠Auscultate the lung fields in the axillae and compare both sides. No
air entry to both sides occurs in:
â an inadequately patent upper airway
â massive tension pneumothorax
â tracheal laceration
Take home message!
The respiratory rate and effort are sensitive indicators of chest trauma.
They should be monitored and recorded at frequent intervals.
12. ďŽ Identify Life Threatening Injuries
⢠Tension Pneumothorax
ďŽ Air trapping in the pleural space between
the lung and chest wall
ďŽ Sufficient pressure builds up and pressure
to compress the lungs and shift the
mediastinum
ďŽ Physical exam
⢠Absent breath sounds
⢠Air hunger
⢠Distended neck veins
⢠Tracheal shift
ďŽ Treatment
⢠Needle Decompression
ďŽ 2nd
Intercostal space, Midclavicular line
⢠Tube Thoracostomy
ďŽ 5th
Intercostal space, Anterior axillary line
Breathing and Ventilation
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
Source: www.meddean.luc.edu
lumenMedEd/medicine/pulmonar/c
xr/pneumo1.htm
Accessed 9/20/09 â Yahoo Images
Delldot (wikimedia
)
14. ďŽ Hemothorax
⢠Blood collecting in the pleural space and is
common after penetrating and blunt chest trauma
⢠Source of bleeding = Lung, Chest wall (intercostal
arteries), heart, great vessels (Aorta), Diaphragm
⢠Physical Exam
ďŽ Absent or diminished breath sounds
ďŽ Dullness to percussion over chest
ďŽ Hemodynamic instability
⢠Treatment = Large Caliber Tube Thoracostomy
ďŽ 10-20% of cases will require Thoracotomy for control of bleeding
Breathing and Ventilation
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://www.trauma.org/index.php/main/images/C11/
Accessed 9/20/09 â Yahoo Images
16. Breathing and Ventilation
ďŽ Flail Chest
⢠Direct injury to the chest resulting in an
unstable segment of the chest wall that
moves separately from remainder of thoracic
cage
⢠Typically results from two or more fractures
on 2 or more ribs
⢠Typically Accompanied by a pulmonary
contusion
⢠Physical Exam = Paradoxical movement of
chest segment
⢠Treatment = Improve Abnormalities in gas
exchange
ďŽ Early Intubation for patients with respiratory
distress
ďŽ Avoidance of overaggressive fluid resuscitation
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://images1.clinicaltools.com/images
/trauma/flail_chest_wounded.gif
http://www.surgical-tutor.org.uk/default-home.htm?
specialities/cardiothoracic/chest_trauma.htm~right
Accessed 9/20/09 â Yahoo Images
20. Needle Thoracostomy
ďŽ Needle Thoracostomy
⢠Midclavicular line
⢠14 guage angiocath
⢠Over the 2nd
rib
⢠Rush of air is heard
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
www.trauma.org/index.php/main/article/199/inde
x.php?main/image/95/
Accessed 9/20/09 â Yahoo Images
21. Tube Thoracostomy
ďŽ Insertion site
⢠5th
intercostal space,
⢠Anterior axillary line
ďŽ Sterile prep, anesthesia with lidocaine
ďŽ 2-3 cm incision along rib margin with #10 blade
ďŽ Dissect through subcutaneous tissues to rib
margin
ďŽ Puncture the pleura over the rib
ďŽ Advance chest tube with clamp and direct
posteriorly and apically
ďŽ Observe for fogging of chest tube, blood output
ďŽ Suture the tube in place
ďŽ Complications of Chest Tube Placement
⢠Injury to intercostal nerve, artery, vein
⢠Injury to lung
⢠Injury to mediastinum
⢠Infection
⢠Allergic reaction to lidocaine
⢠Inappropriate Placement of chest tube
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
www.simulab.com/TraumaMan...tesis.htm/
Accessed 9/20/09 â Yahoo Images
http://www.trauma.org/images/image_library/chest0051a.jpg
Accessed 9/20/09 âYahoo Images
22. Circulation
ďŽ Shock
⢠Impaired tissue perfusion
⢠Tissue oxygenation is inadequate to meet metabolic demand
⢠Prolonged shock state leads to multiorgan system failure and
cell death
ďŽ Clinical Signs of Shock
⢠Altered mental status
⢠Tachycardia (HR > 100) = Most common sign
⢠Arterial Hypotension (SBP < 120)
ďŽ Femoral Pulse â SBP > 80
ďŽ Radial Pulse â SBP > 90
ďŽ Carotid Pulse â SBP > 60
⢠Inadequate Tissue Perfusion
ďŽ Pale skin color
ďŽ Cool clammy skin
ďŽ Delayed cap refill (> 3 seconds)
ďŽ Altered LOC
ďŽ Decreased Urine Output (UOP < 0.5 mL/kg/hr)
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
23. Circulation
ďŽ Types of Shock in Trauma
⢠Hemorrhagic
ďŽ Assume hemorrhagic shock in all trauma patients until
proven otherwise
ďŽ Results from Internal or External Bleeding
⢠Obstructive
ďŽ Cardiac Tamponade
ďŽ Tension Pneumothorax
⢠Neurogenic
ďŽ Spinal Cord injury
ďŽ Sources of Bleeding
⢠Chest
⢠Abdomen
⢠Pelvis
⢠Bilateral Femur Fractures
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
24. Circulation
ďŽ Emergency Nursing Treatment
⢠Two Large IV Lines
⢠Cardiac Monitor
⢠Blood Pressure Monitoring
ďŽ General Treatment Principles
⢠Stop the bleeding
ďŽ Apply direct pressure
ďŽ Temporarily close scalp lacerations
⢠Close open-book pelvic fractures
ďŽ Abdominal pelvic binder/bedsheet
⢠Restore circulating volume
ďŽ Crystalloid Resuscitation (2L)
ďŽ Administer Blood Products
⢠Immobilize fractures
ďŽ Responders vs. Nonresponders
⢠Transient Response to volume resuscitation = sign of ongoing blood
loss
⢠Nonresponders = Consider other source for shock state or operating
room for control of massive hemorrhage
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
27. Circulation
ďŽ Pericardial Tamponade
⢠Pericardium or sac around heart fills with
blood due to penetrating or blunt injury to
chest
⢠Beckâs Triad
ďŽ Distended jugular veins
ďŽ Hypotension
ďŽ Muffled Heart Sounds
⢠Treatment
ďŽ Rapid evacuation of pericardial space
ďŽ Performed through a Pericardiocentesis
(temporizing measure)
ďŽ Open Thoracotomy
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
Heart
Blood
Pericardium
Epicardium
Aceofhearts1968 (
Wikimedia)
28. Pericardiocentesis
ďŽ Puncture the skin 1-2 cm inferior to xiphoid
process
ďŽ 45/45/45 degree angle
ďŽ Advance needle to tip of left scapula
ďŽ Withdraw on needle during advance of needle
ďŽ Preferable under ultrasound guidance or EKG
lead V attachment
ďŽ Complications
⢠Aspiration of ventricular blood
⢠Laceration of coronary arteries, veins,
epicardium/myocardium
⢠Cardiac arrhythmia
⢠Pneumothorax
⢠Puncture of esophagus
⢠Puncture of peritoneum
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://www.trauma.org/images/image_library/chest0054_thumb.jpg
Accessed 9/20/09 â Yahoo Images
www.brooksidepress.org/ProductsTrauma_Surgery?M=A
Accessed 9/20/09 â Yahoo Images
29. Circulation
ďŽ A word about cardiac arrest . . .
⢠Care of the trauma patient in cardiac
arrest
ďŽ CPR
ďŽ Bilateral Tube Thoracostomy
ďŽ Pericardiocentesis
ďŽ Volume Resuscitation
⢠Traumatic Cardiac Arrest due to blunt
injury has very low survival rate (< 1%)
ďŽ No point for emergency thoracotomy
⢠Selected cases of cardiac arrest due to
penetrating traumatic injury may benefit
from emergent thoracotomy
ďŽ Pericardial tamponade
ďŽ Cross clamp Aorta
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://www.trauma.org/images/image_library/chest0046.jpg
Accessed 9/20/09 â Yahoo Images
30. Disability
ďŽ Baseline Neurologic Exam
⢠Pupillary Exam
ďŽ Dilated pupil â suggests transtentorial herniation on ipsilateral side
⢠AVPU Scale
ďŽ Alert
ďŽ Responds to verbal stimulation
ďŽ Responds to pain
ďŽ Unresponsive
⢠Gross Neurological Exam â Extremity Movement
ďŽ Equal and symmetric
ďŽ Normal gross sensation
⢠Glasgow Coma Scale: 3-15
⢠Rectal Exam
ďŽ Normal Rectal Tone
ďŽ Note: If intubation prior to neuro assessment, consider quick
neuro assessment to determine degree of injury
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
31. Disability
ďŽ Glasgow Coma Scale
⢠Eye
ďŽ Spontaneously opens 4
ďŽ To verbal command 3
ďŽ To pain 2
ďŽ No response 1
⢠Best Motor Response
ďŽ Obeys verbal commands 6
ďŽ Localizes to pain 5
ďŽ Withdraws from pain 4
ďŽ Flexion to pain (Decorticate Posturing) 3
ďŽ Extension to pain (Decerebrate Posturing) 2
ďŽ No response 1
⢠Verbal Response
ďŽ Oriented/Conversant 5
ďŽ Disoriented/Confused 4
ďŽ Inappropriate words 3
ďŽ Incomprehensible words 2
ďŽ No response 1
GCS ⤠8
Intubate
GCS ⤠8
Intubate
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
33. Disability
ďŽ Key Principles
⢠Precise diagnosis is not necessary at this point
in evaluation
⢠Prevention of further injury and identification of
neurologic injury is the goal
⢠Decreased level of consciousness = Head
injury until proven otherwise
⢠Maintenance of adequate cerebral perfusion is
key to prevention of further brain injury
ďŽ Adequate oxygenation
ďŽ Avoid hypotension
⢠Involve neurosurgeon early for clear intracranial
lesions
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
34. Disability
ďŽ Cervical Spinal Clearance
⢠Patients must be alert and oriented to person,
place and time
⢠Not clinically intoxicated with alcohol or drugs
⢠Non-tender at all spinous processes
⢠No focal neurological deficits
⢠No distracting injuries
⢠Painless range of motion of neck
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
35. Exposure
ďŽ Remove all clothing- assuming that other injuries are present
⢠Examine for other signs of injury
⢠Injuries cannot be diagnosed until seen by provider
ďŽ Logroll the patient to examine patientâs back
⢠Maintain cervical spinal immobilization
⢠Palpate along thoracic and lumbar spine
⢠Minimum of 3 people, often more providers required
ďŽ Avoid hypothermia
⢠Apply warm blankets after removing clothes
⢠Hypothermia = Coagulopathy(Hypothermia may be a cause of
coagulopathy)
ď Increases risk of hemorrhage
ď Do not forget to do a rectal examination whilst log rolling the
37. Exposure
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://www.trauma.org/images/image_library/chest0044b.jp
g
Accessed 9/20/09 â Yahoo Images
38. Trauma Logroll
ďŽ One person = Cervical Spine
ďŽ Two people = Roll main body
ďŽ One person = Inspect back and palpate
spine
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
www.itim.nsw.gov.au/images/Log_Roll_3_small.jpg
Accessed 9/20/09 â Yahoo Images
40. Secondary Survey
ďŽ Once the immediate life-threatening conditions have
been managed or excluded, the patient should be
completely re-examined
ďŽ If the patient deteriorates at any stage, the airway,
breathing and circulatory systems must be re-
examined as discussed previously for the primary
survey
ďŽ The secondary survey is a
ďźhead-to-toe, front-to-back assessment along with a
ďźdetailed medical history/AMPLE HX and
ďźappropriate investigations
41. History
ďŽ AMPLE History
⢠Allergies
⢠Medications
⢠Past Medical/surgical History, Pregnancy
⢠Last Meal (time)
⢠Events surrounding injury, Environment
ďŽ History may need to be gathered from family
members or ambulance service
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
42. Physical Exam
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
Has Head/Skull
My Maxillofacial
Critical Cervical spine
Care Chest
Assessed Abdomen
Patients Pelvis
Priorities Perineum
Or Orifices (PR/PV)
Next Neurological
Management Musculoskeletal
Decision? Diagnostic tests/ definitive care
45. Physical Exam
ďŽ Battle Sign
ďŽ Raccoon's Eyes
ďŽ Cullenâs Sign
ďŽ Grey-Turner Sign
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://sfghed.ucsf.edu/Education/Cli
nicImages/Battle's%20sign.jpg
Accessed 9/20/09 â Yahoo Images
http://health-
pictures.com/eye/Periorbital-
Ecchymosis.htm
Accessed 9/20/09 â Yahoo Images
H. L. Fred and H.A. van
Dijk (Wikimedia)
H. L. Fred and H.A. van Dijk (
Wikimedia)
46. Adjuncts to Secondary Survey
ďŽ Radiology
⢠Standard emergent films
ďŽ C-spine, CXR, Pelvis
⢠Focused Abdominal Sonography in Trauma (FAST)
⢠Additional films
ďŽ Cat scan imaging
ďŽ Angiography
ďŽ Foley Catheter
⢠Blood at urethral meatus = No Foley catheter
ďŽ Pain Control
ďŽ Tetanus Status
ďŽ Antibiotics for open fractures
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
47. Trauma in Special Populations
ďŽ Pregnancy
⢠Supine Hypotensive Syndrome
ďŽ After 20 weeks, enlarged uterus with fetus and
amniotic fluid compresses inferior vena cava
ďŽ Decreases venous return and decrease cardiac
output
ďŽ Keep pregnant patients in left lateral decubitus
position to avoid excessive hypotension
⢠Optimal maternal and fetal outcome is
determined by adequate resuscitation of
mother
⢠Fetal Monitoring
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
48. Trauma in Special Populations
ďŽ Pediatric Trauma Resuscitation
⢠Differences in head to body ratio
and relative size and location of
anatomic features make children
more susceptible to head injury,
abdominal injury
⢠Underdeveloped anatomy leads to
chest pliability and less protection
of thoracic cage
⢠Cardiac Arrest
ďŽ Typically result from respiratory arrest
degrading into cardiac arrest
⢠Resuscitation
ďŽ Broselow Tape
ďŽ ABCDE
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
http://dukehealth1.org/images/deps_tape4
Accessed 9/20/09 â Yahoo Images
54. Definitive Care
ďŽ Secondary Survey followed by radiographic
evaluation
⢠CatScan
⢠Consultation
ďŽ Neurosurgery
ďŽ Orthopedic Surgery
ďŽ Vascular Surgery
ďŽ Transfer to Definitive Care
⢠Operating Room
⢠ICU
⢠Higher level facility
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
55. Case Example
ďŽ Mr. Jones â 45 y/o male involved
in a rollover road traffic accident
and was ejected from the
vehicle. Patient was
unrestrained. Patient was not
ambulatory on scene of accident
and is brought into trauma bay
for evaluation.
⢠What concerns you about story?
⢠First Steps of Evaluation and
Management
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
Pete Prodoehl (flickr)
56. Case Example
ďŽ Exam
⢠Awake, diaphoretic
⢠Pulse = 120
⢠BP = 90/60
⢠RR = 18
⢠O2 sat = 94%
ďŽ What do you want to do next?
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
57. Case Example
ďŽ Preparation
ďŽ Primary Survey
⢠Awake, alert, talking to provider
⢠Breathing
ďŽ Absent breath sounds on left
ďŽ What do you want to do next?
⢠Circulation
ďŽ Vital Signs?
ďŽ Access?
ďŽ Resuscitation?
⢠IV/O2/Monitor
⢠Disability
ďŽ GCS = 14
⢠Exposure
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
58. Case Example
ďŽ Chest tube placed
⢠Rush of air heard consistent with pneumothorax
ďŽ Repeat Vital Signs
⢠Pulse 120
⢠BP 80/40
⢠RR = 15
⢠O2 sat = 99% NRBM
ďŽ What do you want to do next?
⢠Patient complaining of abdominal pain
⢠Ecchymosis noted over left flank
⢠Resuscitation?
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
59. Case Example
ďŽ Blood Product Administration
ďŽ Transfer to definitive care = Operating Theatre
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
Bonemesh (flickr)
60. Conclusion
ďŽ Assessment of the trauma patient is a standard
algorithm designed to ensure life threatening
injuries do not get missed
ďŽ Primary Survey + Resuscitation
⢠Airway
⢠Breathing
⢠Circulation
⢠Disability
⢠Exposure
ďŽ Secondary Survey
ďŽ Definitive Care
Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
62. Ghana Emergency Medicine Collaborative
Advanced Emergency Trauma Course
References
ďŽ American College of Surgeons. Advanced Trauma
Life Support. 6th
Edition. 1997.
ďŽ Feliciano, David et al. Trauma. 6th
Edition. McGraw
Hill. New York. 2008.
ďŽ Hockberger, Robert et al. Rosenâs Emergency
Medicine: Concepts and Clinical Practice. 6th
Edition. Mosby. 2006.
ďŽ Tintinalli et al. Tintinalliâs Emergency Medicine: A
Comprehensive Study Guide. 6th
Edition. McGraw
Hill. 2003.
Mechanisms of Traumatic Injury
Blunt Trauma
Three separate types of forces involved in blunt traumatic injury that produce injury to the body and internal organs
Compression
Compression forces occur when cells in tissues are compressed and crushed similar to placing an organ (spleen) on a table and hitting it repeatedly with a hammer
Shear
Shear forces occur when an organ and the organâs attachment do not accelerate or decelerate at the same time or same rate of speed.
Prime example is the aorta, the large blood artery that leaves the heart and carries blood to the body. The aorta is attached by branching vessels to the spine along the majority of the descending portion but is not attached by the same mechanism at the arch of the aorta.
So if a rapid decelerating mechanism is encountered the arch may move more freely than the descending aorta and the result is a shearing force or tearing that results in a full thickness tear in the aorta or disruption leading to immediate exsanguination or less extensive tear resulting in a pseudoaneurysm.
Similar shear forces work on other organs such as the spleen, kidney, etc.
Overpressure
Overpressure occurs when a body cavity is compressed at a rate faster than the tissue around it, resulting in overpressure and rupture of the closed space.
Example is a plastic bag filled with air that is then punched rapidly and results in high enough pressure to rupture the bag.
Similar mechanisms involved in abdominal cavity when compressed against the steering column of a car resulting in diaphragmatic rupture into the thoracic cavity. Also mechanisms involved in other organs with similar contained pressures, eg bladder, bowels, lungs.
Vehicular Collisions
Frontal Impact Collisions â A vehicle traveling at a higher rate of speed hits another vehicle that is moving at a slower rate of speed or is not moving at all and the vehicles are oriented with the passengers towards each other
The occupants of the vehicle traveling faster will continue to move forward even after the car has been stopped by the collision until they have impacted against another structure (steering wheel, windshield)
Lateral Impact Collisions
Rear Impact Collisions
Off-Center or Rotational Collisions
Rollover
Occupant Protection
Open Vehicles
Primary Survey
Designed to identify injuries that may be immediately life threatening and to treat them as they are identified. The order of evaluation corresponds to the severity of the injury to cause bad outcomes.
Airway and Protection of spinal cord
Breathing and Ventilation
Circulation
Disability
Exposure and control of the environment
Airway and Protection of Spinal Cord
First Question: Does the patient have a secure airway?
Loss of airway can kill the patient in 3 minutes
asfa