Penetrating abdominal trauma clinical view. Ari Leppäniemi, MD Department of Abdominal Surgery Meilahti hospital University of Helsinki Finland

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1 Penetrating abdominal trauma clinical view Ari Leppäniemi, MD Department of Abdominal Surgery Meilahti hospital University of Helsinki Finland

2 Meilahti hospital - one of Helsinki University hospitals - general and GI-surgery - cardiothoracic and vascular surgery, transplantation emergency surgical visits annually - 70% acute abdomen (including GI-bleeding) - 12% urology, 10% vascular, 5% thoracic - trauma: - blunt 60% (isolated torso injuries) - penetrating 40% (stab wounds > gunshot wounds) emergency operations/year (50% of all)

3 Incidence of organ injuries and outcome in abdominal trauma Frequency of Hospital organ injuries mortality Stab wounds 7-50 % 0-4 % Gunshot wounds % % Blunt trauma 5-10 % %

4 Frequency of organ injuries Penetrating (1272) Blunt (539) Liver 28% 51% Spleen 7% 47% Colon 23% 5% Small bowel 29% 7% Stomach 13% 2% Duodenum 5% 4% Pancreas 6% 6% Fabian & Croce 1996

5 Abdominal vascular injuries Pen Blunt Total %Blunt Inferior vena cava Iliac vein Abdominal aorta Iliac artery Mesenteric artery Portal venous Renal vessel Hepatic veins Mattox 1989

6 Evolution in abdominal trauma care - nonoperative management until 1890 s Sims advocated formal laparotomy for abdominal gunshot wounds to prevent death from shock, hemorrhage or septicemia American Surgical Association recommended exploration of civilian penetrating abdominal wounds - routine exploration of abdominal war wounds from 1915

7 Evolution in abdominal trauma care - mandatory explorative laparotomy until 1960 s - challenged in abdominal stab wounds by Shaftan in selective nonoperative management - abdominal stab wounds in from 1970 s - first randomized study in blunt solid abdominal organ injuries from 1980 s - abdominal gunshot wounds from 1990 s

8 Critical observations and advances Consequences of mandatory laparotomy High rate of unnecessary operations Associated short- and long-term morbidity Cost considerations Improved diagnostics of abdominal trauma Diagnostic peritoneal lavage, Ultrasound (FAST) Computed tomography (multislice multidetector CT) Natural orifice and cavitary endoscopy Nonsurgical interventions Percutanoeus, endoscopic, angiographic/endovascular

9 Therapeutic interventions required - significant bleeding - hollow organ perforation - diaphragmatic perforation - abdominal wall (evisceration)

10 Source of major hemorrhage n died % exsanguin. Aorta (47%) 82% Inferior vena cava 23 9 (39%) 78% (33%) SMA/SMV/PV/HA 13 2 (15%) 0 Liver (9%) 62% (38%) Spleen (7%) 7% (0%) Kidney 83 5 (6%) 80% (0%) Pancreas 43 8 (19%) 25% (0%) Colon (SW) Diaphragm (blunt) 20 3 (15%) 67% (0%)

11 Risk of death and average time to death by systolic blood pressure (penetrating torso) (Pennsylvania Trauma Registry, patients aged years) SBP Risk of death Time to death 90+ 4% 419 minutes % 188 minutes % 161 minutes <50 95% 18 minutes Champion et al. 2003

12 ED time does matter hypotensive patients bleeding from abdominal injuries - pre-laparotomy ED time and survival - in patients spending <90 minutes in the ED, the probability of death increased 1% for each 3 minutes in the ED (overall mortality 40%) Clarke et al. 2002

13 Simple stab wounds vs. hara-kiri wounds - self-inflicted wounds (n=84) - simple stab wounds (n=75) - mostly periumbilical and epigastric - organ injuries in 59% - mortality 1% - hara-kiri wounds (n=9) - middle abdomen - organ injuries in 67% - mortality 22% Morita et al. 2008

14 Studies from Meilahti hospital - Complications of negative laparotomy for truncal stab wounds. J Trauma 1995; 38: 54 - Selective nonoperative management of abdominal stab wounds: prospective, randomized study. World J Surg 1996; 20: Indications for early mandatory laparotomy in abdominal stab wounds. Br J Surg 1999; 86: 76 - Diagnostic laparoscopy in abdominal stab wounds: a prospective, randomized study. J Trauma 2003; 55: Occult diaphragmatic injuries caused by stab wounds. J Trauma 2003; 55: 646

15 Should all patients be operated?

16 Nontherapeutic laparotomy for abdominal stab wounds (mandatory) laparotomies for abdominal and thoracoabdominal stab wounds ( ) - nontherapeutic in 172 (37%) - mortality 0.6% (thoracic vascular injury) - hospital morbidity 21% - mostly wound complications - prolonged hospital stay by 4.6 days Leppäniemi et al. J Trauma 1995

17 What happens if some patients are treated nonoperatively? - mandatory laparotomy vs. selective nonoperative management (1992-4, n = 127) - immediate oper. 46%, superficial 12%, drop outs 2% - randomized: laparotomy (n=27) or observation (n=24) - therapeutic laparotomy rate 6/27 (22%) - delayed recognition of injuries 4/20 (17%) - no early mortality, morbidity: 19% vs. 8% (p=0.26) - median hospital stay: 5 vs. 2 days (p=0.002) - costs saved/observed patient: USD Leppäniemi and Haapiainen 1996

18 Who needs early operative exploration?

19 Predicting the presence of a significant organ injury after abdominal stab wound PPV NPV p Shock on admission Continuing hemorrhage Generalized tenderness GI bleeding or fistula Omental evisceration Peritoneal penetration on LWE Fluid on ultrasonography Extraluminal air on radiography Male sex Leppäniemi et al. 1999

20 Evaluating peritoneal penetration - local wound exploration (local anesthesia, ED) - always available, inexpensive, rapid - unreliable in patients with - obesity, thick abdominal musculature - thoracoabdominal stab wounds - intact anterior fascia (rather than peritoneum) - reliable in identifying superficial injuries - laparoscopy (local/general anesthesia, ED/OR) - sensitive and specific for peritoneal penetration

21 CT in the evaluation abdominal stab wounds - stable patients, requires interpretation - serial US and CT guided management safe (Soto et al. 2001) - triple-contrast helical CT in the diagnosis and exclusion of peritoneal violation and visceral injury - for peritoneal violation: - sensitivity 97%, specificity 98%, accuracy 98% Shanmuganathan et al can be used to exclude visceral injuries (NPV 100%) identifying patients who can be discharged early Salim et al. 2006

22 Explorative laparotomy (EL) vs. diagnostic laparoscopy (DL) in abdominal stab wounds Nontherapeutic Laparotomies laparotomy rate prevented EL DL Dalton % 19% 54% Mutter 1997 not stated 76% Hallfeldt % 50% 87% DeMaria % 19% 55% Leppäniemi % 11% 55% Cherry % 17% 61%

23 Explorative laparotomy (EL) vs. diagnostic laparoscopy (DL) in abdominal stab wounds Morbidity % LOS (days) Costs (1000$) EL DL EL DL EL DL Dalton 1994 not stated Mutter not stated Hallfeldt not stated DeMaria 2000? Leppäniemi

24 Conclusions Diagnostic laparoscopy can not be recommended as a routine diagnostic procedure in anterolateral abdominal or lower thoracic stab wounds. Whether a subgroup of patients with left-sided thoracoabdominal or epigastric stab wounds would benefit from laparoscopy solely to exclude diaphragmatic perforation is possible but not confirmed in this study.

25 Retrospective analysis of epigastric and thoracoabdominal stab wounds, n=97 Incidence of diaphragmatic injuries - overall in the exploration group: 4/47 (9%) - occult (excluding patients with associated injuries requiring surgical repair): 3/43 (7%) - delayed presentation of diaphragmatic injuries (observation group): 2/50 (4%) - occult diaphragmatic injuries following left-sided thoracoabdominal stab wounds: 4/24 (17%) Leppäniemi and Haapiainen 2003b

26 Summary: Risk of significant organ injury in abdominal stab wounds - anterior stab wound 40-50% - if peritoneal violation 60-70% - equivocal peritoneal violation 7% - peritoneum intact on LWE 0% - stab wound of the flank 20-30% - posterior stab wound 7-15% - thoracoabdominal stab wound 15% - occult diaphragmatic injury 7% - right side 3% - left side 17%

27 STAB WOUND OF THE ANTERIOR ABDOMEN OR FLANK SURGICAL ABDOMEN OR PERICARDIAL TAMPONADE IMMEDIATE OPERATION NO INDICATIONS FOR IMMEDIATE SURGERY LOCAL WOUND EXPLORATION PERITONEAL VIOLATION CONFIRMED PERITONEAL VIOLATION EQUIVOCAL LEFT THORACOABDOMINAL WOUND SUPERFICIAL WOUND LAPAROTOMY OBSERVE HOURS DIAGNOSTIC LAPAROSCOPY DISCHARGE

28 Stab wounds of the back

29 STAB WOUND OF THE LOWER BACK STABLE PATIENT UNSTABLE PATIENT OR SURGICAL ABDOMEN CT SCAN IMMEDIATE OPERATION WOUND EXTENDS TO RETROPERITONEUM WOUND LENGTH UNDETERMINED WOUND LIMITED TO MUSCULAR LAYER LAPAROTOMY FOLLOW UP HOURS DISCHARGE

30 Abdominal gunshot wounds

31 Laparoscopy in abdominal gunshot wounds - prospective, abdominal gunshot wounds (n=672) - DL for 121 consecutive (18% of all) patients, stable - 42 (35%) positive laparoscopies - 39 (93%) explorative laparotomies, 3 NOM (liver) - 32 (82%) therapeutic (21 solid, 13 dia, 11 hollow) - 7 non-therapeutic - 79 (65%) negative laparoscopies - no false negatives, no delayed laparotomies - sensitivity 83%, specificity 100% Sosa et al. 1995

32 Abdominal computed tomography CT in abdominal gunshot wounds n=100 nontangential, no shock or peritonitis Laparotomy in 26 (5 nontherapeutic; CT 3, clinical 2) False negative in 2 (operated 2 and 3.5 hours later) Hollow viscus injuries, no complications Sens 91%, spec 96%, change in management in 40 patients CT is safe and useful in selecting patients for NOM Routine vs. clinical examination and selective CT? Radiation exposure in trauma patients Velmahos et al. J Trauma 2005 Mean 22.7 msv; 190/ additional cancer deaths Tien et al. J Trauma 2007

33 Selective nonoperative management Selective nonoperative management is a safe method for managing patients with abdominal gunshot wounds in a level 1 trauma center with an in-house trauma team. It reduces significantly the rate of unnecessary laparotomy and hospital charges. (Velmahos et al. 2001)

34 ABDOMINAL GUNSHOT WOUND OBVIOUS PERITONEAL PENETRATION SHOCK PERITONITIS GI-BLEEDING/FISTULA EVISCERATION SUPERFICIAL OR TANGENTIAL WOUND CHANNEL LAPAROTOMY LAPAROTOMY WOUND EXPLORATION PERITONEAL PENETRATION OR HIGH ENERGY BULLET EXTRA- PERITONEAL WOUND LAPAROTOMY DEBRIDEMENT AND DELAYED PRIMARY CLOSURE

35 Nonoperative management - abdominal vascular injuries - liver injuries - splenic injuries - 85% of adult hepatic and splenic injuries are managed nonoperatively - organ injury grading is important! - interventional radiology

36 Liver Injury Scale I - subcapsular (<10%) hematoma, <1cm laceration II - subcapsular (10-50%), intraparenchymal (<10 cm) hematoma cm deep laceration (<10 cm long) III - subcapsular (>50% or exp.), intraparenchymal (>10 cm or exp.) or ruptured hematoma - >3cm deep laceration IV - parenchymal disruption (25-75% of lobe or 1-3 segments in one lobe) V - parenchymal disruption (>75% of lobe, >3 segments) - juxtahepatic venous injury, hepatic avulsion Moore et al. 1995

37 Pancreatic injury - severity classification (AAST 1990) - Grade I and II: hematoma or laceration, main duct intact - Grade III: distal transection or parenchymal injury with duct injury at or to the left of the SMV - Grade IV: proximal transection or parenchymal injury not involving ampulla - Grade V: massive disruption of the pancreatic head with ampullary injury

38 Nonsurgical interventions Angioembolization Splenic, hepatic and renal injuries Retroperitoneal and pelvic arteries Pseudoaneurysms, and AV-fistulas Endovascular treatment (stent grafts) Endoscopy ERCP: partial injuries to biliary and pancreatic ducts Percutanous drainage Replacing surgical drainage Postoperative for complications

39 Summary Abdominal stab wounds Majority of stab wounds of the anterior abdomen, flanks and the back can be managed nonoperatively Peritoneal penetration, when reliably detected, is associated with moderate risk of significant organ injury and requires further diagnostic studies or exploration (low volume centers?) Laparoscopy detects diaphragmatic perforations in leftsided thoracoabdominal stab wounds Abdominal gunshot wounds Majority need operative exploration but nonoperative management can be used in selected cases

40 Thank you!