Incisional, Ventral, Epigastric, or Umbilical hernias are defects of the anterior abdominal wall. They may be congenital (umbilical hernia) or acquired (incisional). Incisional hernias form after surgery through the incision site or previous drain sites, or laparoscopic trocar insertion sites. Incisional hernias are reported to occur in approximately 4-10% of patients after open surgical procedures. Certain risk factors predispose patients to develop incisional hernias, such as obesity, diabetes, respiratory insufficiency ( lung disease), steroids, wound contamination, postoperative wound infection, smoking, inherited disorders such as Marfan's syndrome and Ehlers-Danlos syndrome, as well as poor surgical technique. Approximately 90,000-100,000 incisional hernia repairs are performed annually in the United States.
These hernias present much the same way inguinal hernias do. That is, they present with a bulge near or at a previous incision. Some patients may experience discomfort, abdominal cramping or complete intestinal obstruction, or incarceration as a result of these hernias.
The principle of surgical repair entails the use of prosthetic mesh to repair large defects in order to minimize tension on the repair. A tension free repair has a lesser chance of hernia recurrence. Traditionally, the old scar is incised and removed, and the entire length of the incision inspected. Generally, there are multiple hernia defects other than the one(s) discovered by physical examination. The area requiring coverage is usually large and requires much surgical dissection. A prosthetic mesh is used to cover the defect(s), and the wound closed. This is a major surgical procedure and often complicated. Infection rates following repair may be as high a 7.0%. Recurrence can be up to 5%, or higher, depending on the patient's preoperative risk factors. While the use of prosthetic mesh has decreased the number of recurrences, it has also been implicated in increased infection rates, adhesion or scar formation of the abdominal contents to the anterior abdominal wall leading to intestinal obstruction and fistula formation. However, overall, recovery is usually excellent and patients return to normal activity within a matter of weeks.
The laparoscopic repair of ventral hernias was designed to minimize operative trauma to the patient. As mentioned, these are often complicated repairs requiring large incisions and extensive tissue dissection. The principles governing a laparoscopic ventral hernia repair are based on those of open Stoppa ventral hernia repair. A large piece of prosthetic mesh is placed under the hernia defect with a wide margin of mesh outside the defect (see figure). The mesh is anchored in to place with eight full thickness sutures and secured to the anterior abdominal wall with a varying number of tacs, placed laparoscopically.
A patient is a candidate for laparoscopic incisional hernia repair if they are medically able to undergo general anesthesia. Also, the defect must "allow" the surgeon to place the laparoscopic trocars in such positions that repair are ergonomically possible. In some very large or giant hernias, the abdominal wall is distorted to such a degree that it is impossible to safely place laparoscopic trocars. Ancillary studies, such as CT scan of the abdomen and pelvis are helpful in making this decision. Patients are also given a bowel preparation to evacuate the colon and decrease the number of intestinal bacteria prior to surgery.
Patients are admitted the same day of their surgery. Following the procedure and recovery from anesthesia, they are taken to a hospital room where they spend the night. We encourage our patients to move as quickly as possible. It is extremely important to be active early in order to stave off some of the complication seen postoperatively, such as pneumonia, deep venous thrombosis and pulmonary embolism (clots in the legs that break off and go the lungs). Postoperative pain is variable, and can be considerable during the first 24 hours. As such, patients are given I.V. narcotics as needed, and are changed to oral analgesics the next day. Generally, most patients stay in the hospital 1 or 3 days following surgery. Patients are then seen, by the surgeon, one to two weeks after discharge. There is no dietary restriction. Activity level is restricted by the patient's comfort level. However, it is generally not advisable to engage in any strenuous exercise or heavy lifting for several weeks, to allow the hernia repair to heal.
oAny operation may be associated with complications. The primary complications of any operation are bleeding and infection, which are uncommon with laparoscopic hernia repair.
o There is a slight risk of injury to the urinary bladder, the intestines, blood vessels, nerves or the sperm tube going to the testicle.
o Difficulty urinating after surgery is not unusual and may require a temporary tube into the urinary bladder.
o Any time a hernia is repaired it can come back. This long-term recurrence rate is not yet known. Your surgeon will help you decide if the risks of laparoscopic hernia repair are less than the risks of leaving the condition untreated.
Only after a thorough examination can your surgeon determine whether laparoscopic hernia repair is right for you. The procedure may not be best for some patients who have had previous abdominal surgery or have underlying medical conditions.
In a small number of patients the laparoscopic method is not feasible because of an inability to visualize or manipulate the organs involved. Factors that may increase the possibility of converting to the "open" procedure may include obesity, a history of prior abdominal surgery causing dense scar tissue, or bleeding problems during the operation. The decision to perform the open procedure is a judgment decision made by your surgeon either before or during the actual operation. The decision to convert to an open procedure is strictly based on patient safety.
o Most hernia operations are performed on an outpatient basis, meaning the patient will go home on the same day that the operation is performed.
o You should refrain from eating or drinking after midnight on the night before your operation.
o You should shower the night before or the morning of the operation.
o If you have difficulties moving your bowels, an enema or similar preparation should be used after consulting with your surgeon.
o Some preoperative testing may be required depending on your medical condition and the type of anesthesia needed for your operation.
o If you take medication on a daily basis, discuss this with your surgeon as (s)he may want you to take some of your medications on the morning of surgery with a sip of water. If you take aspirin, blood thinners or arthritis
o You should discuss with your surgeon the proper timing of discontinuing some medications before your operation.