1. In the 19th century, penetrating abdominal wounds were managed nonoperatively.
The associated morbidity and mortality rates were greater than 70%.1 Experience
gained during World War I, World War II, and the Korean Conflict led to an
aggressive approach of operative management for all penetrating abdominal
wounds.2 This approach resulted in an unacceptably high frequency of laparotomy
with findings negative for trauma. In 1960, Shaftan developed an approach of
selective conservatism for penetrating abdominal injury and revolutionized
abdominal stab wound management.3
The optimal method to determine the need for laparotomy has yet to be definitively
established. Abdominal stab wound exploration forms part of a strategy developed
by surgeons to allow a more selective approach. In asymptomatic patients with stab
wounds to the anterior abdomen, 2 methods are widely used to help determine the
need for laparotomy:
• Abdominal stab wound exploration (Subsequent diagnostic peritoneal lavage
[DPL], serial clinical evaluation, or both are used to further assess patients in
whom an exploration cannot definitively exclude peritoneal penetration.)
• Serial clinical evaluation
The objective is to reduce the number of patients with trivial or no intraperitoneal
injury who are subjected to laparotomy. However, a high degree of diagnostic
accuracy must be maintained to limit the frequency of missed injury. A reduction in
unnecessary hospitalization is also targeted.
Investigators in this field are continuing to study other protocols and investigative
tools. No protocol is currently universally accepted. Other modalities that have been
studied include DPL alone, laparoscopy, CT, and ultrasonography. These
strategies of selection for laparotomy are explored in greater detail below.
Abdominal stab wound exploration is a safe, rapid, and cost-effective tool in the
management of asymptomatic patients who present with an anterior abdominal
stab wound.4 This approach has no place in the treatment of patients who are
unstable, who have peritonitis, or who have evisceration. Patients with peritonitis
and those who are hemodynamically unstable should undergo mandatory
laparotomy.
More than 25% of anterior abdominal stab wounds do not penetrate the peritoneal
cavity.5, 6 Local wound exploration allows the safe discharge of these patients from
the emergency department. Only half of the wounds that penetrate the peritoneum
cause damage that requires surgical intervention.1, 7 The organs most commonly
injured with anterior abdominal stab wounds are the small bowel, the liver, and the
colon. Missed hollow viscus injuries are associated with significant morbidity and
mortality.
The authors advocate abdominal stab wound exploration in asymptomatic patients

2. who present with an anterior abdominal stab wound. An exploration with negative
findings is reliable and highly sensitive. Abdominal stab wound exploration
combined with further investigation, such as DPL or serial evaluation, achieves
acceptable specificity rates. Minimizing the time taken to control ongoing
intraperitoneal contamination is critical in penetrating stab wounds, and local
exploration is a valuable first step in speeding up the decision-making process.
When combined with DPL, abdominal stab wound exploration allows significant
injuries that are not immediately apparent to be identified early.
Wound exploration can be performed successfully by surgeons or ED personnel
who are trained in the procedure. This strategy aids with patient flow through a
busy emergency department.
Flow chart illustrating the management options in patients with a stab wound
to the anterior abdomen. Red arrows highlight an approach that favors
abdominal stab wound exploration.
Anatomy
An appreciation of the anatomy of the anterior abdominal wall at different levels is
essential to understanding the procedure. The differences are highlighted in red on
the diagrams below.
Transverse section of the anterior abdominal wall above the arcuate line.
Transverse section of the anterior abdominal wall below the arcuate line.
Boundaries of the anterior abdomen:
• Costal margins (superior)

3. • Inguinal ligaments (inferior)
• Anterior axillary lines (lateral)
•
Boundaries of the anterior abdominal wall.
INDICATIONS
Section 3 of 15
Abdominal stab wound exploration is indicated in a patient who presents with a
stab wound to the anterior abdomen, normal vital signs, no signs of peritonitis, and
no evidence of evisceration.
Stab wound to the anterior abdomen.
Some authors advocate local exploration of wounds only anterior to the midaxillary
line. If the wound tracks anteriorly and the end point of the tract is not accurately
determined, the patient undergoes diagnostic peritoneal lavage (DPL). If the wound
tracks posteriorly and is not obviously superficial, the patient is investigated as for a
penetrating flank wound. This often involves a triple-contrast CT scan.8
Special circumstances involve patients with additional injuries that require operative
intervention and cases in which the offending weapon or object is retained.
• If the patient has additional injuries that require operative intervention, a

4. wound exploration may be performed in the operating room before the other
procedure is commenced.
• If the object has been retained and the surgeon strongly suspects that the
peritoneum has not been breached, the object may be removed in the
operating room and the wound locally explored. In such cases, the surgeon
should be prepared to immediately convert to laparotomy, if necessary.
CONTRAINDICATIONS
Section 4 of 15
Abdominal stab wound exploration is contraindicated if immediate laparotomy is
indicated. The situations in which immediate laparotomy is indicated include the
following:
• Unstable patient
• Peritonitis
• Evisceration (This remains controversial; see paragraph 3 in Selecting
Candidates for Laparotomy section.)
• Blood on rectal examination or blood in nasogastric tube aspirate suggests
intra-abdominal injury (A low threshold for operative intervention is
suggested.)
Other contraindications to abdominal stab wound exploration include the following:
• Lower chest wounds: Exploration of these wounds carries a high risk of
iatrogenic pneumothorax.
• Flank and back wounds: Some authors advocate exploration of these
wounds if they are suspected to be superficial. However, this
expectation may be unreliable, and the strong musculature makes the tract
difficult to predict or to follow. Local wound exploration may result in further
injury or a restart of hemorrhage that had stopped.
• Patient refusal or uncooperative patient.
Relative contraindications include the following:
• Obesity
• Multiple abdominal stab wounds

5. ANESTHESIA
Section 5 of 15
• Local anesthesia is used.
• Use liberally, as patient comfort is essential. The procedure requires patient
compliance and adequate anesthesia. Hemostasis is also important.
• The authors’ suggested preparation is 1% lidocaine hydrochloride (10
mg/mL) with epinephrine 1:200,000 (5 mcg/mL). Other preparations can be
used.
• The maximum dose of lidocaine combined with epinephrine is 7 mg/kg, up to
500 mg.
• Local exploration in uncooperative patients is best performed in the
operating room under general anesthesia.
For more information, see Local Anesthetic Agents, Infiltrative Administration.
EQUIPMENT
Section 6 of 15
• Adequate light source or operating lamp
• Sterile gloves
• Surgical masks
• Surgical caps
• Protective eyewear
• Sterile gowns
• Sterile drapes
• Cleaning solution (10% povidone iodine [Betadine] or other suitable solution)
• Lidocaine hydrochloride (1%) with epinephrine
• Gauze swabs
• Suture material (See Technique for suggestion of suture material.)
• Wound dressing
• Washout irrigant (1 L of 0.9% NaCl)
• Scalpel
• Blades, 2
• Retractors, 2
• Dissecting forceps (toothed and untoothed)
• Needle holder
• Scissors (curved dissecting and stitch scissors)
• Hemostats, 5
• Diathermy may be used, if available. Diathermy assists with achieving

6. hemostasis.
Equipment required for an abdominal stab wound exploration.
POSITIONING
Section 7 of 15
• The patient is positioned supine.
• Adequate exposure of the abdomen is essential.
• Abdominal stab wound exploration can be effectively performed in the
emergency department
TECHNIQUE
Section 8 of 15
• Obtain informed consent for the procedure.
• Gather and check equipment.
• Position the patient supine and elevate the operating table or stretcher to an
appropriate height.
• Shave and prepare the area around the stab wound. The maintenance of a
sterile field is essential.
Sterile field.
• Local wound exploration requires an operator and an assistant. Both the
operator and assistant should scrub, as for any surgical procedure.
• Liberally infiltrate local anesthetic with epinephrine around the wound, using
standard surgical technique. Adequate hemostasis is necessary to facilitate
direct visualization of the tract of the wound and to prevent further
hemorrhage in wounds that penetrate the peritoneum. Also, the wound may
need to be extended, which may result in further bleeding. For both these

7. reasons, lidocaine with epinephrine is preferred as the anesthetic agent.
Achieving poor hemostasis has been associated with subsequent false-
positive diagnostic peritoneal lavage (DPL) results and unnecessary
laparotomy. Do not exceed the maximum dose of lidocaine.
Anesthetize the wound.
• Most stab wounds are small and need to be extended with a scalpel to allow
visualization of the underlying fascia. To optimize subsequent wound healing
and cosmetic result, midline wounds should be extended vertically and
lateral wounds should be extended horizontally along natural skin lines. The
required length of extension is determined by the depth of subcutaneous fat.
Wounds heal from the sides rather than the ends; hence, lengthening the
wound does not affect the repair process.
Midline wound: Extend vertically.
Lateral wound: Extend horizontally.
• The assistant uses the retractors to visualize the depths of the wound.
Diathermy is a useful aid in the maintenance of hemostasis.
Visualize depths of the wound and maintain hemostasis.
• Appreciation of the anatomy of the anterior abdominal wall at different levels
is essential. The procedure cannot be safely completed if you do not know
which layer you are exploring and what lies immediately beneath it.
Transverse section of the anterior abdominal wall above the arcuate
line.
Transverse section of the anterior abdominal wall below the arcuate
line.
• Further explore the wound under direct vision, taking care to identify the
fascial layers and the musculature. Breach of the anterior rectus fascia
requires extension of the fascial defect. This can be achieved with a scalpel,
with dissecting scissors, or with diathermy. This allows inspection of the
underlying muscle and the posterior layer of the rectus sheath. There is no
posterior layer of rectus sheath below the arcuate line, but the rectus fascial
defect is still extended to allow inspection of the underlying muscle and
transversalis fascia.

8. Explore under direct vision.
• The goal of exploration is to determine the end point of the tract. This is not
always easy, especially in more lateral wounds. The fascial planes are more
difficult to identify laterally. Following the tract through muscle can be
challenging. If the posterior rectus fascia or transversalis fascia is
adequately visualized and is intact, the patient does not have an intra-
abdominal injury. After adequate wound care, the patient can be discharged
from the emergency department.
Nonpenetrating wound: External oblique muscle intact in base of
wound.
• If the posterior rectus fascia or the transversalis fascia is penetrated, the
local wound exploration findings are positive. The frequency of peritoneal
injury is high in patients with positive findings. Assessing the integrity of the
parietal peritoneum itself is technically difficult, and exploring at this level
risks converting a nonpenetrating wound into a wound that breaches the
peritoneum. If breach of the peritoneum cannot be confidently excluded, the
patient requires further assessment and investigation.
Penetrating midline wound.

9. Penetrating lateral wound. (The exploration of this wound clearly
determined that the stomach had been penetrated. Therefore, the
patient did not require diagnostic peritoneal lavage [DPL], as
laparotomy was already indicated. During laparotomy, a hole in the
stomach and 2 holes in the small bowel were repaired. The patient had
an uneventful postoperative course and was discharged from the
hospital 3 days later.)
• Patients who require further investigation usually undergo DPL. The wound
should be temporarily packed with dry gauze and a sterile dressing until the
lavage is completed. This packing helps prevent further hemorrhage into the
peritoneum from the wound. A DPL with positive findings further delineates
patients who are more likely to have an intra-abdominal injury that requires
surgical intervention. The stomach and bladder must be decompressed
before DPL.
• The wound is then thoroughly irrigated with saline and closed in layers.
Hemostasis and sound surgical technique prevent subsequent wound
complications. The sheath is closed with strong absorbable suture (PDS 0 or
Vicryl 0). Muscle need only be repaired if the defect is large. If muscle repair
is necessary, interrupted absorbable sutures (Vicryl 2-0) are used. In
individuals who are obese, the subcutaneous fat can be approximated with
absorbable sutures. The wound edges rarely require debridement before
skin closure. The skin is closed with skin clips, interrupted nonabsorbable
sutures, or continuous subcuticular sutures. Some authors have advocated
suturing the surgical extension wound but leaving the stab wound to heal by
secondary intention to minimize the risk of infection. Unless the wound is
markedly contaminated, this is unnecessary.
Suture wound in layers. (This patient sustained a nonpenetrating stab
wound to the abdomen. After the wound was repaired, the patient was
discharged from the emergency department, and routine follow-up
wound care was arranged with the local clinic.)
• Patients with an exploration with negative findings may be discharged home.
Antibiotics are not required. Routine surgical wound care is provided.
PEARLS
Section 9 of 15
The critical concept is to determine the end point of the tract under direct vision.
• Ensure good lighting.
• Ensure hemostasis and adequate anesthesia.
• Extend the wound to allow good visualization.

10. • Use retractors and a trained assistant.
• Use a hemostat or other instrument as a guard to cut onto when exploring
the depths of the wound. This assists with accuracy of dissection and
prevents extending the wound at a deeper level than anticipated.
• The exploration usually takes 10-15 minutes. Meticulous dissection
ultimately saves time.
• The exploration of an abdominal wound in patients who are markedly obese
can be particularly challenging. In these patients, consider performing the
procedure in the operating room with the patient under general anesthesia.
• Do not probe the wound with a finger or blunt object, as this can cause
further hemorrhage, give a false impression of the tract, distort the anatomy
of the wound, and introduce infection into the depths of the wound.
• Diathermy simplifies the exploration because it helps maintain hemostasis.
• When doubt exists, prudence involves further investigation, observation, or
consideration for exploratory laparotomy.
COMPLICATIONS
Complications of abdominal stab wound exploration are rare (rate is approximately
1%). Complications include local wound infection and bleeding.
Published papers report no false-negative exploration findings.5, 9
SELECTING CANDIDATES FOR LAPAROTOMY
No debate exists about the management of patients who are hemodynamically
compromised or who exhibit peritonitis upon abdominal examination. These
patients are immediately transferred to the operating room and undergo
laparotomy.
The optimal management for an asymptomatic patient with an anterior abdominal
stab wound remains controversial. Routine laparotomy was once advocated but is
no longer accepted practice. The universally accepted practice is now selective
management of asymptomatic patients with stab wounds. However, the methods
used to select those who will benefit from laparotomy are controversial.
No consensus has been reached regarding the treatment of patients with
evisceration of omentum or an abdominal organ. Many still opt for operative
intervention in this group and cite a high incidence of organ injury as the reason for
their standpoint.10, 11 Demetriades and others have shown that these patients can

11. also be successfully managed nonoperatively, provided that they are stable and
that the findings of their abdominal examination remain benign.12, 13
Methods that aid practitioners in the selection of patients whose injuries are likely to
warrant laparotomy are an area of ongoing study. Each method has its merits and
shortfalls, and combinations of techniques are not uncommon.
The 2 most commonly used selective approaches are abdominal stab wound
exploration (combined with DPL) and serial clinical evaluation. Results from the
available studies show comparable patient outcomes.
Modern approaches have succeeded in limiting the mortality due to anterior
abdominal stab wounds to as low as 0-3.6%.1, 14 Selective approaches have
achieved unnecessary laparotomy rates of less than 10%.1, 4, 6, 9, 12, 14 In abdominal
stab wounds, the morbidity rate of a laparotomy with negative findings is in the
range of 1.5-8%.14, 15, 16 Regrettably, a limited number of injuries are still missed.
Abdominal stab wound exploration
Abdominal stab wound exploration allows for safe and immediate discharge of
approximately 25% of patients with an abdominal stab wound. When performed by
trained operators, this procedure is 100% sensitive.9 If one considers patients who
mandate laparotomy and those who have an exploration with negative findings,
local wound exploration can guide an early, clear, and safe decision in more than
half of patients who present with an anterior stab wound.9 Unfortunately,
positive local wound exploration findings carry a poor specificity for significant intra-
abdominal injury. If all patients with positive abdominal exploration findings were to
undergo laparotomy, more than 40% would do so unnecessarily.1, 9 Patients with
positive local exploration findings, therefore, undergo DPL to further select those
who are likely to have an intra-abdominal injury that requires surgical intervention.
This strategy successfully reduces the number of nontherapeutic laparotomies.17
Diagnostic peritoneal lavage
DPL was initially developed as a tool to help assess for intra-abdominal injury in
patients who had sustained blunt trauma. Its value in penetrating trauma is
accepted, but its application is less clear. No consensus exists concerning what
constitutes a positive result, and protocols vary from one institution to the next. Pre-
lavage aspiration of 20 mL of blood is generally accepted as a positive result. The
lavage fluid is assessed for red blood cells, white blood cells, bile, feces, and
vegetable matter.
Some authors have also assessed various enzymes, including alkaline
phosphatase (ALP) and amylase, with limited clinical value. Some authors have
used a red blood cell count of greater than 100,000/μL and a white blood cell count

12. of greater than 500/μL as the threshold. At these relatively high values, the
incidence of missed injury increases and, consequently, even patients with
negative lavage findings are further assessed and observed.4, 6, 14 These cell count
cutoff values are the same as those used for blunt trauma. When applied, these
values achieve an accuracy rate of 90-91%.4, 18
Isolated injuries to hollow organs often cause little bleeding. These injuries are
commonly associated with lavage red blood cell counts of less than 100,000/μL or
even of less than 10,000/μL. However, red cell counts of less than 1,000/μL are
almost never associated with significant intra-abdominal injury.4, 9, 19
The white blood cell count threshold is not without problems, either. An elevated
count raises suspicion of a hollow visceral injury. The intraperitoneal contents do
not reliably produce a white cell response to injury until approximately 3 hours after
the injury occurs. Hence, the timing of the lavage becomes important. Lavages
performed soon after injury may reflect relatively low white cell counts despite
significant injury. If significant delay occurs before the lavage is performed, even a
simple breach of the peritoneum may produce a significantly raised white blood cell
count.4
No threshold for DPL achieves 100% accuracy. The clinician must determine the
relative weight of missed injury (false-negative findings) versus that of unnecessary
laparotomy (false-positive findings). Up to 60% of visceral injuries involve the small
bowel or colon.1, 20 Injuries to these organs are still the leading cause of morbidity
and mortality in patients with abdominal stab wounds.9 Surgeons are aware that the
risk of morbidity and mortality of missed hollow visceral injury far outweighs that of
unnecessary laparotomy; therefore, many have elected to lower their threshold for
operative intervention. DPL is increasingly considered a quantitative assay that
merely serves to provide further information to assist in decision-making and should
no longer be used blindly with absolute cutoff values.
DPL may be unhelpful in patients with retroperitoneal injury. A lower threshold
increases the sensitivity of the investigation but results in an increase in
unnecessary surgery.21 Demetriades achieved successful nonoperative
management of patients with solid viscus injury with a protocol combining serial
observation and CT scan.22 DPL is not organ-specific. Oreskovich and Carrico
quote a complication rate for DPL of less than 1%.9
Serial clinical evaluation
Serial clinical evaluation is a method used by many surgeons as a selective
approach to abdominal stab wound management. Approximately 30% of patients
with a significant abdominal injury have initial benign abdominal examination
findings.1 Furthermore, up to 10% of injuries are initially overlooked, even in the

13. more advanced trauma centers.23 These statistics clearly demonstrate the value of
serial evaluation.
The length of hospital stay in patients whose injuries are managed conservatively
varies among institutions. One study showed that no significant injuries were
discovered in any patients who were asymptomatic after 12 hours of observation.24
Most protocols, however, recommend evaluation of the patient over 24-72 hours.12,
25, 26
The delay in laparotomy inherent in such an approach has not been associated
with adverse outcome.12 This is, possibly, because most severe injuries are obvious
early. Degree of contamination is likely more important than the delay in surgery,
provided the delay is not excessive. However, few would argue with the principle
that the time taken to control contamination should be minimized. Martin et al found
a 6-fold increase in complications in patients with colonic injury who were not
operated on within 12 hours.27
Unfortunately, studies have also shown that 14-28% of patients without an injury
that penetrates the peritoneum have misleading positive abdominal examination
findings.6, 14, 15
Other methods of selection
Other methods of selection have been advocated, but few claim advantage over
the 2 selective approaches discussed above.
Some authors advocate DPL alone without prior local wound exploration as
particularly useful in patients who are difficult to assess clinically because of drugs
or alcohol or who are to be anesthetized for another procedure. A study
successfully used a red blood cell lavage count of less than 1,000/μL as a criterion
for immediate discharge from the emergency department.19 The authors claim that
DPL is a simple procedure with few complications and that the complications, when
they occur, are usually immediately evident. This view is certainly not shared by all.
Sinography ("stabogram") and blind probing of wounds are unreliable procedures.1,
28
Few authors advocate the use of laparoscopy in the management of anterior
abdominal stab wounds. It may be useful as an adjunct in special circumstances.
Laparoscopy is reliable when used to determine breach of the peritoneum or to
assess potential diaphragm injuries in patients with wounds to the left upper
quadrant or lower chest. It is unreliable in the assessment of hollow visceral
injuries. A protocol of stab wound exploration followed by emergency department
awake laparoscopy for equivocal cases has been studied, but it resulted in 31.3%
of selected patients being exposed to the risks of unnecessary surgery.29 At this
stage, laparoscopy lacks sufficient therapeutic value to be used routinely in
abdominal stab wounds.30

14. Ultrasonography, on its own, is inadequate as an investigation of anterior
abdominal stab wounds and rarely aids in the management of these cases.31
Focused abdominal sonography for trauma (FAST) scan has proved to be a
reliable method of investigation in blunt abdominal trauma, especially when the
scan is repeated.32 This type of scan is less helpful in the assessment of patients
with penetrating injury.31, 33 Low sensitivity and low negative predictive value limit its
accuracy as an investigation. Positive FAST scan findings are useful predictors of
significant intraperitoneal injury and, when performed early, can decrease the time
to operation.33 To confidently exclude significant intraperitoneal injury in patients
with negative FAST scan findings, additional investigations are required.33
A small study of 35 patients has suggested a role for fascial ultrasonography to
detect fascial penetration in anterior abdominal stab wounds.34 As an investigation,
fascial ultrasonography had a specificity and positive predictive value of 100%.
Positive fascial ultrasonographic findings rule out the need for an abdominal stab
wound exploration. Unfortunately, even in more experienced hands, fascial
ultrasonography had a sensitivity of only 73%. The resultant drawback, therefore, is
that negative fascial ultrasonographic findings do not adequately exclude an intra-
abdominal injury, which requires further investigation or observation. Further
assessment of the use of fascial ultrasonography may be justified.
Despite the instrumental role of CT scan in the assessment of penetrating flank and
back wounds, it has traditionally been of little help with anterior abdominal wounds.
The technology has not adequately revealed hollow visceral and diaphragm
injuries.35 Interestingly, the presence of free intraperitoneal air has poor specificity
for intra-abdominal organ injury. Air can track through a defect in the abdominal
wall and enter the peritoneal cavity. As part of a prospective study of 651 patients
with abdominal stab wounds, 18 patients with free air under the diaphragm on plain
radiograph were managed conservatively by method of serial examination. Only 2
of these patients went on to laparotomy, and no adverse outcomes were reported
in the other 16 patients.12
With improved technology, CT scan may be becoming a more useful study for
penetrating abdominal wounds. More recent studies find fewer missed hollow
visceral injuries than was previously reported.22, 36 Serial clinical evaluation, when
combined with CT scan, has been shown to be an effective strategy in the selective
management of abdominal stab wounds.22, 36 This approach is only suitable for well-
staffed major centers with sufficient experience in abdominal stab wound
management.
Further developments
Further trials (or, perhaps, technology) may provide the next development in
anterior abdominal stab wound management. No meaningful change has occurred
in decades in the suggested management of this important and growing group of

15. patients. No single investigation is likely to provide all the information necessary to
accurately determine which patients are likely to have injuries that require surgical
intervention. The combination of physical examination and other investigations has
allowed a reduction in unnecessary intervention.37
A multidisciplinary working party recently developed evidence-based guidelines for
the management of haemodynamically stable patients with stab wounds to the
anterior abdomen. They conducted a systematic review of the available literature
and recommended the use of abdominal stab wound exploration.38
For now, abdominal stab wound exploration remains a valid and effective tool that
allows safe and early discharge of a significant number of patients. It is also
valuable as a first step in a process that limits the time to decision-making in the
management of asymptomatic patients with anterior abdominal stab wounds.
FURTHER READING
Cayton CG, Nassoura ZE. Abdomen. In: Ivatury RR, Cayton CG, editors. Textbook
of Penetrating Trauma. 1st ed. Baltimore, Md: Williams & Wilkins, 1996:281-299.
Kirby R, Viswanathan S, Jiang R. Diagnostic and Therapeutic techniques. In:
Sherry E, Trieu L, Templeton J, editors. Trauma. 1st ed. New York: Oxford
University Press, 2003. p.715-716.
Back and flank wounds
Coppa GF. Back and Flank. In: Ivatury RR, Cayton CG, eds. Textbook of
Penetrating Trauma. 1st ed. Baltimore, Md: Williams & Wilkins, 1996:300-308.
Diagnostic peritoneal lavage
Marx J. Diagnostic Peritoneal Lavage. In: Ivatury RR, Cayton CG, editors.
Textbook of Penetrating Trauma. 1st ed. Baltimore, Md: Williams & Wilkins,
1996:335-343.
Wilson RF, Walt AJ. General Considerations in Abdominal Trauma. In: Wilson RF,
Walt AJ. Management of Trauma: Pitfalls and Practice. 2nd ed. Baltimore, Md:
Williams & Wilkins; 1996:411-431/20.

16. Media type: Illustration
Media file 4: Boundaries of the anterior abdominal wall.
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Media type: Illustration

17. Media file 5: Stab wound to the anterior abdomen.
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Media type: Photo
Media file 6: Equipment required for an abdominal stab wound exploration.
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Media type: Photo

18. Non-penetrating wound. External oblique muscle intact in base of wound

19. Penetrating midline wound
Penetrating lateral wound to the stomach requiring exploration