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Diagnostic peritoneal lavage is the most useful diagnostic procedure for suspected intra-abdominal visceral injury.
Diagnostic peritoneal lavage is contraindicated in certain circumstances when intra-abdominal injury is obvious and mandatory laparotomy is indicated.
Indications for DPL:
1. Head injury or impaired level of consciousness when abdominal
injury cannot be excluded.
2. Unexplained hypotension, particularly in association with head
injuries.
3. Suspicion of abdominal trauma, e.g. bruising pattern, guarding,
tenderness, no bowel sounds.
4. Wounds that penetrate the peritoneum (except gunshot Wounds)
Complications of DPL:
1. Instillation of fluid into extraperitoneal tissues.
2. Bowel perforation.
3. Trauma to the iliac vessels.
4. Bladder perforation.
* CT scanning:
Computed tomography should be performed when abdominal trauma is suspected in an unconscious patient undergoing CT
evaluation of head injury. Injuries to solid viscera are easily seen in the abdominal CT, whereas ruptures of hollow viscus is easily missed. Patients undergoing CT scan must be haemodynamically stable.
Contrast enhanced CT scan gives useful anatomical and functional information about several organs.
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Ultrasonography:
Ultrasound can detect free fluid and injuries of solid organs,especially liver, kidneys, spleen and associated haematomas. It could also help detecting rupture of the hemidiaphragm.
FAST (focused abdominal sonography for trauma)
a. To identify if the abdomen is the source of haemorrhage in unstable
trauma patients.
b. To evaluate those with no major risk factors for abdominal trauma.
FAST - Results
Reliability
· Accuracy 86 - 97 %
· Sensitivity 88 - 91.7 %
· Specificity 94.7 - 99 %
· Can detect 70 ml fluid
Surgical intervention in abdominal trauma:
The principles of management should be to stop the bleeding, debride devitalized tissues, repair wounds to the bowel by suture or resection and eliminate all foreign bodies, haematomas and intestinal contents to reduce postoperative complications (infections or others) It is very important to identify the full extent of the intra-abdominal injury and to plan the operative strategy.
Injury of diaphragm.
These rare injuries are more common following penetrating trauma than blunt trauma, but could result from a high speed blunt trauma also.
The sudden rise in intra-abdominal pressure breaches the weakest part of the abdominal wall, namely the diaphragm. 90% of the diaphragmatic
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injuries are on the left hemidiaphragm. The right side is protected by the liver. The diaphragmatic rupture must be repaired at laparotomy to avoid late complication of diaphragmatic hernia. Colon and stomach may herniate into the thorax, displacing the lung. Bowel sounds could be heard in the chest and the chest radiograph may reveal bowel gas in the lung fields.
A contrast study would confirm the diagnosis. Sometimes cases presented acutely are treated by thoracotomy or thoracolaparotomy to achieve proper and accurate exploration.
Injury left diaphragm with colon in left chest cavity.
Spleenic injury
In the majority of cases injury of spleen is a solitary lesion but injury to adjacent structure such as diaphragm, pancreas, kidney and stomach is not uncommon finding..
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Diseased spleen (enlarged) is more likely to rupture than a normal one.
* Pathological features:
Avulsion from the pedicle. Enlarged spleen usually split on its outer aspect to produce either a
tear or a subcapsular haematoma. Small tear in the anterior aspect of the hilum which may produce quite
sever bleeding and yet be difficult to detect. And the importance of determining the degree of the injury may help
for the proper therapeutic steps: It may permit non operative management. Could alert the surgeon to the possibility of the spleenic repair at operation
** Clinical presentation:
Spleenic rupture cases are divided into 3 groups: I. The patient die rapidly, never rallying from the initial shock due to
tear of speenic vessel and complete avulsion of the spleen from its pedicle that give rise to rapid blood loss which can be fatal in few min.
II- Initial shock recovery from shock condition with signs of ruptured
spleen, it represents the commonest type of spleenic injury with 75% of cases.
III- Delayed type ; after initial signs have passed off, the symptoms of
serious intra-abdominal catastrophe are post pond for a variable period up to 15 days or more. The cause of delayed haemorrhage is local vasoconstriction and blood clot formation that seal the tear.
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* General signs of internal haemorrhage:
1. Pallor. 2. Increase of pulse rate.
3. Low blood pressure. 4. Restlessness
** Local signs:
1- Absence of bowel sound 2- Abdominal rigidity (in 50% of cases on upper abdomen) 3- Local bruising and tenderness on upper abdomen. 4- Abdominal distension due to peritonism and ileus. 5- Kehrs sign: pain referred to left shoulder, also can be Demonstrated
15 min after elevation of the bed foot (it is due to contact of blood
to the undersurface of diaphragm). 6 - Positive shifting dullness. 7- Balances sign: (in 25% of cases): there is dull note in both flanks,
but on right side can be shifted, where on left side it is constant
because blood around ruptured spleen is coagulated. 8- Rectal examination (PR): tenderness and soft swelling, due to blood
or clot in recto-vesical pouch.
*** Radiographic signs:
1- Elevation of left hemidiaphragm. 2 - Indentation of left side of gastric air bubble. 3- Obliteration of splenic outline. 4- Fractures of one or more of lower ribs of left side. 5- Transverse colon displaced downward. 6- Fluid b/w the coils of intestine. 7- Obliteration of psoas shadow
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This CT shows a splenic injury
Management of splenic rupture:
1. Non-Operative Approach
· Stable
· Identified on Scan (USS/CT Scan)
· Exclusion of other injuries
Bed rest for 48 hours Restrict activity for 6 weeks or longer. Avoidance of any sports for 6months.
Risks:
· Missed injuries to other viscera
· Delayed rupture of spleen
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Surgical intervention is indicated (> 30%) when:
· Haemodynamic instability
· Signs of peritonism
· Transfusion requirement >2 units/day
Ruptured spleen
This splenic injury above had stopped bleeding at laparotomy, and no further treatment was required. Observations such as this led to the current cautious philosophy of selective non-operative management
Operative approach in splenic injury:
Left paramedian incision is more popular nevertheless in an emergency situation and supraumbilical midline incision could offer certain advantages.
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Ones the spleen is diseased and grossly enlarged a transversal or left subcostal incision is better and proper, then it gives a good access to the pedicle and could be extended to a thoracolapratomy incision if spleen is difficult to handle by the abdominal approach alone.
The intraoperative strategy is according to the condition of the spleen. Due to the importance of the spleen for the immunology of the organism
the operative strategy is to preserve the spleen. A. If the spleen is not so much damaged a try to preserve the spleen
should be done (60% of spleens previously resected could be preserved)
B. Hemisected spleen can be partially resected. C. Small laceration
may be sutured by heavy suture of polydioxanone.
D. Large laceration can be packed with omentum and is secured in
place with the same heavy sutures.
E. If the spleen is severely damaged and bleeding cannot be controlled
splenectomy is indicated.
Complications of splenectomy:
1- Serrous effusion in the splenic bed mimic subphrenic abscess. 2- Thrombocytosis. 3- Late infection which can be prevented by: Penicillin V for 1 up to for life. Pneumococcal vaccine.
Liver injury
The liver is the second common injured abdominal organ following blunt trauma and the most injured after penetrating trauma. Liver trauma
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may range from simple capsular avulsion or tear to sever retro-hepatic caval injury. The most important feature is the extent of disruption of liver parenchyma,in addition to bleeding from capsular tear there is haemorrhage and necrosis in the liver substance. The mass of clot and dead tissues that results may cause 2nd bleeding (local fibrinolysis), infection, rupture to biliary system and spreading inflammatory process in the liver that resemble cholangitic hepatitis.
There is much similarity between the presentation of rupture of liver and rupture of spleen.
1. Early death in spite of attempts at resuscitation.
2. Gradualy development of signs of intra-abdominal disaster.
3. Delayed rupture (traumatic haemobilia)
Management.
The basic principles in the management of hepatic trauma are the control of haemorrhage, removal of devitalized tissues and perihepatic drainage.
I. Non-Operative Approach:
a. Blunt trauma, Stable and is identified on CT Scan. Exclusion of other injuries Observe in specialist centre Possible risks of non-operative way are:
1. Missed injuries to other viscera
2. Delayed rupture of liver (rare)
3. Biliary leaks (ERCP or Percutaneous) When to stop non-operative approach? (2-11%)
1. If hemodynamic instability
2. Non-hepatic injuries were not previously identified.
3. Transfusion requirement >2 units/day
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II. Operative approach:
On entering the abdomen haemorrhage can be encountered by 2 manoeuvres:
1. Pringles manoeuvre (compression of hepatic artery and hepatic
vein) -a large gauze pack should be tightly inserted into the laceration.
2. In case of small liver tear, suturing is indicated and possible.,but if
there is a large liver tear packing with planned reoperation within the next 12-18 hours, and definitive haemorrhage control is sometimes the only right choice.
Most major complications following hepatic trauma:
1. Postoperative haemorrhage.
2. Abcess formation.
3. Biliary fistula
Pancreatic injury
The usual lesion is transection and this frequently takes place through the body of the pancreas along the vertical line of the inferior mesenteric vein. Pancreatic injury is difficult to diagnose and most of cases are discovered only at surgical exploration.
1. Only mild initial pain being experienced.
2. Over a few hours epigastric and back pain set in and vomiting is
profuse.
3. Then an intractable ileus and progressive circulatory failure develops.
Diagnosis:
1- Serum amylase level may be helpful (if they are markedly raised,
significant injury to pancreas, but also normal value don't exclude sever damage.
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