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ABDOMINAL WOUND DEHISCENCE
Dr Umar Muh’d AminuDepartment of Surgery
ATBUTH Bauchi
Outline• Introduction-
– Definition– Epidemiology
• Causes– Pre-operative– Operative– Post-operative
• Classification• Clinical features• Treatment
– Non-operative– Operative
• Prevention• Conclusion
Introduction
• Important cause of morbidity and mortality among surgical patients
• Affects patients by increasing distress and mortality; the attendants by increasing cost of treatment; the surgeon for whom it is a disturbing reality ; and the hospital resources by increasing health care cost due to prolonged hospital stay
Definition
• separation of the layers of an abdominal wound before complete healing has taken place
• occurs when a wound fails to gain sufficientstrength to withstand stresses placed upon it. The separation may occur when overwhelming forces break sutures, when absorbable sutures dissolve too quickly or when tight sutures cut through tissues.
Epidemiology• Occurs in 2% of
Laparatomies• M:F=2:1• All ages->>over 50yrs• Commonest time of
disruption= 7-12 days post operatively
• Emergency>>Elective• Vertical
incisions>>>transverse incisions
Epidemiology Closure• Mass vs. Layered Closure?
Incidence of burst – layered closure > mass closure
• Interrupted vs. Continuous Sutures? Interrupted suturing – low
incidence of bursts• Peritoneal Closure or not?
Suturing the peritoneal - not vital to prevent Burst Abdomen
Cause of Disruption
• Increased Intra-abdominal Pressure vs. Weakness of Wound
• Pre-operatively vs. Operatively vs. Post-operatively
• Patient factors vs. Physician factors
Pre-operatively
Causes of ↑ed IAP• Chronic cough• Vomiting• Abdominal distension• 4Bladder outflow
obstruction
Causes of Wound weakness• Hypoprotienamia• Vitamin C Deficiency• Malignancy• Anaemia• Uraemia• Prolonged Steroid Therapy• Jaundice• Radiation
Operatively
Causes of ↑ed IAP• Excessive tissue
handling• Failure to decompress
grossly distends bowel
Causes of Wound Weakness• Vertical vs. Transverse incision• Damage to nerves after
subcostal or para-rectal incision
• Use of absorbable sutures to close rectus
• Poor suturing technique• Persistent leakage of
pancreatic enzymes• Failure of asepsis
Post-operatively
• Persistence of pre-operative factors• Wound haematoma• Wound infection• Post-op ileus
Classification
• Superficial and Revealed-– When skin and stitches are removed with
separation of skin and subcutaneous layers only• Deep and Concealed– There is separation of all layers of the abdominal
wall with exception of skin• Complete and Revealed (Burst abdomen)– Protrusion of loop of bowel or portion of
omentum
Clinical Features
Symptoms• Nausea• Fever• Local pain/Discomfort
Signs• Serosanguinous (pink)
or blood stained discharge
• Bowel or omentum protruding through the wound spontaneously after removal of sutures
Burst Abdomen
Treatment options
• Non-operative
• Operative
Non-operative treatment
• If patient is unstable and there has been no evisceration
• Involves either gauze packing of the wound or covering it with a sterile occlusive dressing
Non-operative treatment(cont’d)
• Abdominal binder may be used to support disrupted abdominal wound
Non-operative treatment(cont’d)
• Vacuum Assisted Closure (VAC)– Used in 10% of total patients– Significantly reduces post operative infection– Reduces the uses of antibiotics prescriptions– Can be safely used in patients using anti-
coagulants
Non-operative treatment(cont’d)
• Wound may subsequently contract to closure or if the patient’s condition improves, delayed operative closure may be performed
Operative Treatment
• Resuscitation if shock (+)• Reassurance• Appropriate analgesics• Nothing by mouth• Nasogastric tube insertion and suction• Antibiotic• Cover the wound with saline soaked sterile towel and
transfer to OT• Emergency operation for replacement of bowel and
re-suturing of wound
Operative Procedure• Each coils of intestine are washed with normal saline gently
and thoroughly• Return to abdominal cavity• Clean the abdominal wall
• Re-approximated with through and through monofilament nylon
• Buttressed by tension suture• Abdominal wall is supported by many-tail bandage, Adhesive
plaster• Post-operative -General build-up
-Treat/Avoid predisposing factors
Prevention
Preoperative• Correct the precipitating factors• Manage causes of increased intra-abdominal
pressure• Omit medications like steroids if possible• Prophylactic antibiotics• GI decompression (Ryle’s tube suction) in case of
intestinal obstruction
Per-operative• Reduce septic load –peritoneal toilet• Choice of suture –non-absorbable suture for wound
closure• Tension free closure• Follow Jenkin’s rule in closing midline laparotomy
wound– Mass closure technique (include peritoneum +
rectus sheath in closure)– Continuous suture– Suture should be FOUR times the length of the
incision and bites should be taken 1cm from the wound edge at 1cm intervals
• Good surgical technique and principles
Post-operative• Prevention of wound sepsis• Manage causes of increased intra-abdominal
pressure and GI distension• Urgent recognition and treatment of wound
dehiscence• Follow-up
Conclusion
• Abdominal wound high mortality rate and no single cause being responsible: rather it is a multi factorial problem
Reference• Principles and Practice of Surgery including Pathology in the Tropics; 4th
Edition; E A Badoe, E Q Archampong, J T da Rocha-Afodu• S H Waqar, Zafar Iqbal Malik, Asma Razzaq, M Tariq Abdullah, Aliya
Shaima, M A Zahid; Frequency And Risk Factors For Wound Dehiscence/Burst Abdomen In Midline Laparotomies; J Ayub Med Coll Abbottabad 2005;17(4)
• Kusum Meena, Shadan Ali, Awneet Singh Chawla, Lalit Aggarwal, Suhani Suhani,Sanjay Kumar, Rehan Nabi Khan; A Prospective Study of Factors Influencing Wound Dehiscence after Midline Laparotomy; Surgical Science, 2013, 4, 354-358 http://dx.doi.org/10.4236/ss.2013.48070 Published Online August 2013 (http://www.scirp.org/journal/ss)
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