trauma to postgraduate
DESCRIPTION
نوفمبر2014 محاضرات عين شمسTRANSCRIPT
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Trauma
Mohamed Mustafa MarzoukProf of Surgery Ain Shams University
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RTA• Road traffic injuries cause more than 1 million deaths
annually and about 20 to 50 million significant injuries worldwide.
• More than 90% of car accidents occur in developing countries.
• In Egypt, road traffic deaths in 2010 were estimated to be 10,729 according to the annual report of World Health Organization (WHO).
• The total number of accidents in Cairo-Egypt and on its travel roads in 2013 is 13,957 with a 24% increase from 2012.
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The wreckage of a minibus lies at the site of an accident near a railway crossing in Dahshur, Egypt, November 18, 2013.
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Trimodal Death Distribution
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Initial assessment
1. Primary survey (ABCDE).2. Resuscitation.3. Adjuncts to primary survey and resuscitation.4. Secondary survey (head- to- toe evaluation + AMPLE history.5. Adjuncts to secondary survey.6. Continuous monitoring and re-evaluation.7. Definitive care.
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Primary Survey
• The patient is assessed for life-threatening injuries + starting management simultaneously.
• Adhere to the following sequence of priorities:1. Airway maintenance and protection of cervical
spine.2. Breathing and ventilation.3. Circulation with haemorrhage control.4. Disability; Neurological status.5. Exposure with prevention of hypothermia.
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Airway maintenance
How do I know the air way is adequate?
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Protection of cervical spine
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Odontoid fracture
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Life-threatening thoracic injury
1. Tension pneumothorax.2. Open pneumothorax.3. Flail chest and pulmonary contusion.4. Massive haemothorax.5. Cardiac tamponade.
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Abdominal trauma
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External Anatomy
Anteriorabdomen
Flank
Back
Penetrating wounds ?
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Internal Abdominal Regions
Upper peritoneal cavity
Lower peritoneal cavity
Pelvic cavity
Diaphragm LiverSpleenStomachTransverse colon
Small bowelColon
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Internal Abdominal Regions
Upper peritoneal cavity
Lower peritoneal cavity
Pelvic cavityIntraperitonealRetroperitoneal
Retroperitoneal space
AortaInferior vena cavaDuodenumPancreasKidneysUretersColon
Visceral Injuries are difficult to diagnose, why?
RectumBladderIliac vesselsUterusOvariestubes
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Mechanism of Injury
It determines what organs are probably
injured.
Why is it important to know?
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Compression
Crushing
Shearing
Deceleration (fixed organs)
Blunt Force Mechanism
How does it injure?
Liver and spleen
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Blunt Force Mechanism
Spleen (40 – 55%)
Liver (35 – 45%)
Small bowel (5 – 10%)
There is 15% incidence of retroperitoneal haematoma during laparotomy for blunt abdominal trauma
What organs are commonly injured?
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Seat Belt abdominal injuries
• Rupture of upper abdominal viscera (shoulder harness)
• Tear or avulsion of mesentry.• Small bowel or colon.• Chance fracture of lumbar vertebrae.(hyper
flexion).• Pancreatic. • Duodenal.
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Stab· Low energy· Lacerations
Gunshot
· Transfer of kinetic energy· Cavitation (lateral damage)· falling· Fragments
Penetrating Mechanism
How does it injure?
· High energy
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Penetrating Mechanism
· Liver 40%· Small bowel 30%· Diaphragm 20%· Colon 15%·spleen
Low Energy High Energy
· Small bowel 50%.
· Colon 40%.
· Liver 30%.
· Vascular structures 25%.
Common injuries?
Explosive devices:1. Penetrating fragments2. Blunt injuries 3. Blast pressure injuries
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Assessment: History
Blunt Speed Point of impact Intrusion Safety devices Position Ejection
Penetrating Weapon Distance Number of woundsAmount of external bleeding.
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Assessment: Physical Exam
Inspection
Palpation
Percussion
Auscultation
Pelvic stabilityUrethralPerinealPRPVGluteal
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Abdominal Trauma
What can compromise the exam?
Alcohol or other drugs
Injury to brain, spinal cord
Injury to ribs, spine, pelvis
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Management: Gunshot Wound
Early operation usually is
the best strategy.
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Evidence of abdominal injury by mechanism, history, or evaluation
Hypotension
Positive FAST or grossly positive DPL
Absence of massive hemothorax on chest x-ray
Abdominal injury causes shock?
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Adjunct: Gastric Tube
Relieves distention
Decompresses stomach before DPL.
To avoid aspiration.
Caution· Fracture skull base / facial fractures· May induce vomiting / aspiration·Blood in gastric secretions.
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Adjunct: Urinary Catheter
Monitors urinary output Decompresses bladder before DPL Diagnostic
Caution
Do not insert the catheter if there is one of the following:1. Inability to void.2. Unstable pelvic fracture.3. Blood at the urethral meatus.4. Scrotal and perineal haematoma.5. High riding prostate.
Retrograde urethrography should be done first.
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Adjuncts: X-ray Studies
Routine Blunt: AP chest, pelvis and cervical spine Penetrating: AP chest and abdomen with markers (if
hemodynamically normal) to all entrance and exit wound sites.
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Adjuncts: Contrast Studies
Urethrogram Cystogram IVP GI
Abdominal CT
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Special Studies in Blunt Trauma
Time
Transport
Sensitivity
Specificity
Eligibility
DPL FAST* CT
Rapid Rapid Delayed
No No Required
High High? High
Low Intermediate High
Allpatients
All patients Hemodyna-mically normal
* Operator dependent
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Diagnostic Studies: Penetrating
Lower chest wounds: Serial exams, thoracoscopy, laparoscopy, or CT scan
Anterior abdominal stab wounds: Wound exploration, DPL, or serial exams
Back and flank stab wounds: DPL, serial exams, or double- or triple-contrast CT scan
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Indications for celiotomy?
Blunt Trauma
BP, suspect visceral injury Free air Diaphragmatic rupture Peritonitis ve DPL, FAST, or contrast CT
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Indications for celiotomy?
Penetrating Trauma
Hypotension Peritoneal / retroperitoneal injury Peritonitis Evisceration ve DPL, FAST, or contrast CT
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Remember…
…. a missed abdominal injury is a common
cause of a potentially preventable death.
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Pelvic Fractures
Mechanism
Lateral compression
AP compression
Vertical shear
Classification
Open
Closed
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Pelvic Fractures
Significant force applied Associated injuries
Pelvic bleeding
· Bone ends· Pelvic muscles
Veins / arteries
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Pelvic Fractures
Assessment
Inspection
Palpate prostate
· Leg-length discrepancy, external rotation · Pain on palpation of bony pelvic ring
Pelvic ring instability:
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Pelvic Fractures
Emergency Management
Fluid resuscitation (Hypovolaemic shock)
Determine if open or closed fracture
Splint pelvic fracture
Determine associated perineal / GU injuries
Determine need for transfer
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Shock
• It is a systemic state of inadequate tissue perfusion and oxygenation.
• It is the most common cause of death among surgical patients.
• Hypovolaemic shock is the most common form of shock and is a component of other forms of shock.
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Shock in trauma patient
Haemorrhagic . Non-haemorrhagic:• Tension pneumothorx.• Cardiogenic .• Neurogenic.• septic
In injured patient, haemorrhage is the most common cause of shock.
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Pathophysiology
Triad of death
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Classification
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Any injured patient who is cool and has tachycardia is considered shock until proven otherwise.
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Treatment
• Stop bleeding.• Restore blood volume:
1. Initial fluid infusion.2. Blood transfusion.
• Monitoring1. Urine output 2. Vital signs3. ECG4. CVP
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Responses to fluid resuscitation
2000 ml of warm isotonic solution in adult and 20 ml/Kg of Ringer’s lactate in children given as fast as possible.
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Blood Transfusion
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Blood transfusion
1492 Pope Innocent VIII is said to have been given the world’s first blood transfusion by his Jewish physician who made him to drink blood of three 10-year-old boys.
1829 James Blundell makes the first successful human transfusion in women with post-partum haemorrhage.
1926 The British Red Cross institutes the first blood transfusion service in the world.
1939 The Rhesus system is identified and recognized as major cause of transfusion reaction.
James Blundell
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Blood and blood products• Whole blood: rarely available.• Packed red cells:
– 330 ml and has haematocrit of 50-70%.– It is stored in SAGM (saline-adenine- glucose-mannitol). – Shelf time 5 weeks at 2-6°C.
• Fresh frozen plasma (FFP):• Rich in coagulation factors.• Stored at -40 to -50°C.• Shelf-time 2 years.• coagulopathy.
• Platelets:– Stored at 20 – 24 °C (room temperature).– Shelf time 5 days.– They are given in thrombocytopeic patients who are bleeding or undergoing surgery.
• Cryoprecipitate:• It the supernatent precipitate of FFP.• It is rich in factor VIII and fibrinogen.• Stored at -30°C with 2- yearsshelf –life.
• Prothrombin complex concentrates (PCCs):• It contains factors II, VII, IX and X.• Half life of factor II 60 – 72 h while others 6 – 24 h.• It is the reversal of oral anticoagulant (warfarin).
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Indications for blood transfusion
• Acute blood loss.• Peri-operative anaemia:
• Symptomatic chronic anaemia.
Hg level (g dl¯¹ )
< 6 Indicated for transfusion.
6 - 8 Transfusion if there Is bleeding, impending surgery.
> 8 No indication for transfusion.
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World wide distribution of blood groups
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Massive blood transfusion
• It is the replacement of blood volume in 24 hours or > 50 % within 4 hours.
• Coagulopathy.• Hypocalcaemia.• Hyperkalaemia.• Metabolic alkalosis.• Hypothermia:
– Coagulopathy.– Hypocalcaeia.– Decrease O2 delivry to tissue (O2 diss. Curve to right).
• Acute lung injury
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Management of coagulopathy
• FFP if PT and PTT > 1.5 of normal.• Cryoprecipitate if fibrinogen < 0.8 g/L.• Platelets if platelet count < 50 00 /cu mm.
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Blood substitutes
• Haemoglobin-based oxygen carrier (HBOCs).• Per-florocarbon.
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Glasgow Coma Scale (GCS)
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Blast injury
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Key concepts
1. Bombs and explosions can cause unique pattern of injuries rarely seen in civilian trauma.
2. Post explosion injuries involve both blunt and penetrating trauma.3. Expect half of all initial casualties to present in ER in one-hour
period.4. Most severely injured arrive after the less injured (upside-down
triage). 5. Explosions in confined spaces are associated with great morbidity
and mortality than that in open air.6. Blast lung is the most common fatal injury among initial survivors. 7. Repeatedly examine and assess the patients.
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Explosives
High-order explosives (HE)• Manufactured • TNT, Nitroglycerine, ANFO,
dynamite.• supersonic over-perssurization
shock waves.• detonation
Low-order explosives (LE)• Improvised.• Molotov cocktails.• Subsonic wave.• Deflagration
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Primary blast injury
Secondary blast injury
Tertiary blast injury
Quaternary blast injury
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Primary Unique to HE.Results from the impact of the pressure wave with body surfaces.
(Blast wave)
Gas filled structures are most susceptible - middle ear -lungs. -GI tract.
- TM rupture and middle ear damage - Blast lung (pulmonary baro- traumas)- Abdominal hemorrhage and perforation - Globe (eye) rupture - Concussion without physical signs of head injury.
Secondary Results from flying debris and bomb fragments
Any body part may be affected
- Penetrating or blunt injuries -Eye penetration (can be occult)
Tertiary Results from individuals being thrown by the blast wind
Any body part may be affected
- Fracture and traumatic amputation - Closed and open brain injury
Quaternary - All explosion-related injuries, not due to primary, secondary or tertiary mechanisms. - Includes exacerbation or complications of existing conditions.
Any body part may be affected
- Burns. - Crush injuries - Closed and open brain injury - Respiratory problems from inhaling dust, smoke, or toxic fumes. - Angina - Hyperglycemia-Hypertension
Category Mechanism Body Part Affected Types of Injuries
Classification
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Casualties
• Multiple casualties• Mass casualties• Triage :
– it is a process of determing the priority of patient treatment.– Priority was given to patients who has greatest chance of
survival.– Tags or markers– At different levels:
• At the scene of trauma• on arrival• Re-triage
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Triage Scenario
• You are the only doctor available in ER with one nurse to assist you. 2 ambulance arrived with 5 patients who were passengers travelling in bus before it crashed in a collision
• The injured patients are:
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• 6-year-old boy is crying from severe pain in his left thigh and asking for his mother.
• 45-year-old man. He is in severe respiratory distress. Multiple contusion over the chest wall he has Bp 120/80, pulse 120, RR40 and GCS 8.
• 38-year- old female thrown outside the bus and has unstable pelvis. The Bp 80/40, pulse 140, RR 25 and she is alert.
• 50-year-old man breathless and not moving. He has burst abdomen with intestines coming out and he lost considerable amount of his blood.
• Pregnant women in 3rd trimester who is shouting and has abdominal pain with normal vital signs.
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Questions
• Give short account on causes, diagnosis and treatment of airway obstruction in trauma patient.
• Discusses the management of shocked in trauma patient. • Classification and management of hemorrhagic shock in
trauma patient.• Discuss the management of life-threatening injuries in
trauma patient.• Give short account in penetrating abdominal injury.• Mangement of traumatic fracture pelvis.• Give short account on blast injury.
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