An appendicectomy (or appendectomy in the US) is the surgical removal
of the vermiform appendix. This procdure is normally performed as an
emergency procedure when the patient is suffering from acute
appendicitis. In the absence of surgical facilities, intravenous
antibiotics are used to delay or avoid the onset of sepsis; it is now
recognised that many cases will resolve when treated conservatively.
In some cases the appendicitis resolves completely; more often, an
inflammatory mass forms around the appendix. This is a relative
contraindication to surgery.
Appendicectomy may be performed laparoscopically or as an open
operation. Laparoscopy is often used if the diagnosis is in doubt, or
if it is desirable to hide the scars in the umbilicus or in the pubic
hair line. Recovery may be a little quicker with laparoscopic surgery;
the procedure is more expensive and resource-intensive than open
surgery and generally takes a little longer, with the (low in most
patients) additional risks associated with pneumoperitoneum (inflating
the abdomen with gas). Advanced pelvic sepsis occasionally requires a
lower midline laparotomy.
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In general terms, the procedure for an open appendicectomy is as
- Antibiotics are given immediately if there are signs of sepsis,
otherwise a single dose of prophylactic intravenous antibiotics is
given immediately prior to surgery.
- General anaesthesia is induced, with endotracheal intubation and full
muscle relaxation, and the patient is positioned supine.
- The abdomen is prepared and draped and is examined under anaesthesia.
If a mass is present, the incision is made over the mass; otherwise,
the incision is made over MacBurney's point, one third of the way from
the anterior superior iliac spine (ASIS) and the umbilicus; this
represents the position of the base of the appendix (the position of
the tip is variable).