Laparoscopic Appendectomy

1. Laparoscopic Appendectomy Use, history and performance By Rob West

2. In this presentation: • Contents • About appendicitis • History of appendectomy • Patient presentation • Workup and diagnosis • Treatment methods/Pre-op • Advantages of Laparoscopic method • Contraindications for laparoscopic method • OR setup • Instruments used • Port placement • Anatomy • Procedure overview • Procedure key steps • Complications • Post-op

3. Appendicitis • The vast majority of appendectomies are due to appendicitis. • Characterized by inflammation in the appendix • Caused by blockage of the appendix from fecal impaction or lymphoid hyperplasia. Crohn’s and IBS also increase risk of appendicitis • Inflammation compromises blood flow to appendix  tissue death  rupture • Rupture  bowel contents (including flora) spill into abdominopelvic cavity; peritonitis, potentially fatal • Because rupture can occur within 72 hours of onset, appendicitis is a MEDICAL EMERGENCY. A rapid response is CRITICAL

4. History of the Appendectomy • The first recorded successful removal of an appendix was in 1735 by Claudius Aymand, but it was done during a hernia operation. • Early cases of appendicitis were described as “iliac passion”. The disease was poorly understood, and the appendix was not implicated until the 1800’s • Boston surgeon Reginald Fitz published a paper in 1886 establishing a link between appendicular inflammation and iliac passion (he was the first to call this pathology “appendicitis.”) A German physician named Matterstock published similar findings in Europe around that time. • American Dr. Thomas Morton performed the first appendectomy for appendicitis successfully in 1887 • First performed laparoscopically by German OB/GYN Kurt Semm in 1981 • Laparoscopic procedure was rejected originally as “unethical,” but quickly became mainstream

5. Patient Presentation • First, vague pain around navel • With time, increases in intensity and sharpness • Pain migrates to RLQ (McBurney’s Point) • Nausea/Vomiting • Severe abdominal pain • Fever • Reduced appetite • Constipation or diarrhea • “Rebound tenderness”

6. McBurney’s Point McBurney’s point (1) appears about one-third of the distance along a line starting at the right ASIS (3) and ending at the umbilicus (2).

7. Workup and diagnosis • Physical Exam: along with HPI often sufficient to diagnose appendicitis • CT scan or Ultrasound: Other diseases can present with similar symptoms (e.g. hernia, diverticulitis, hepatitis, some gynecological diseases). Imaging appendix can help determine if it is inflamed. • Urine test might rule out UTI, which can present similarly • As many as 20% of appendectomies may involve removal of a healthy appendix

8. Treatment methods/Pre-Op • Though mild cases can be treated with antibiotics, many surgeons prefer to err on the side of caution and perform the surgery to avoid rupture. • Determine how long it has been since patient has eaten; instruct patient to fast • Patient is administered antibiotics to prevent peritonitis and other infections • Patient is sedated and given an IV drip to hydrate

9. Advantages of Laparoscopic Method • Shorter hospital stay • Fater recovery time • Lest post-operative pain • Fewer post-operative complications • Minimal scarring

10. Contraindications for Laparoscopic Method • Cardiac diseases/COPD: pneumoperitoneum induced by insufflation may cause arrhythmias or make breathing too difficult for patients with these conditions. • Obesity • Previous abdominal surgeries

11. OR Setup • Patient is supine, laying flat • Surgeon and assistant positioned on patient’s left • Monitors on patient’s right, facing surgeons • Anesthesiologist conventionally stationed at patient’s head (not shown)

12. Instruments Used • Atraumatic grasper • Laparoscopic scissors • Dissector • Endo GIA (or stapler, or endoloop ligature applicator) • Suction/irrigation device • Extraction tube • Extraction bag • Zero-degree scope • 3 Trocars (two 5mm and one 10mm) • Alternately, electrocautery tools may also be used

13. Port Placement • 10-mm trocar placed through umbilicus (this port holds camera) • 5-mm trocar placed at suprapubic region • 5-mm trocar placed at LLQ • *A fourth port containing extraction tube may be placed closer to McBurney’s point later in procedure.

14. Anatomy ABOVE: Internal anatomy of RLQ of abdominal cavity HIGHLIGHTED IN RED: Appendix and mesoappendix (medially; contains appendicular artery)

15. Procedure Overview • Ports placed at umbilicus, suprapubis, LLQ • Inspect abdominal cavity and located ileocecal junction • Retract bowel to expose appendix • Separate mesoappendix to locate appendicular artery • Divide appendix • Divide appendicular artery • Extract appendix • Irrigate thoroughly • Final inspection of abdominal cavity

16. Procedure: Key Steps Step 1: Port placement A 10-mm trocar is placed at the umbilicus, and the abdominal cavity is insufflated to a pressure of 15 mmHg. The camera is also inserted through this larger trocar. A 5-mm trocar is placed at the suprapubis, and a second 5-mm trocar is placed at the LLQ. (Placement of the third port may vary by surgeon preference or as case dictates but LLQ is standard placement) Step 2: Inspect abdominal cavity The area is inspected to orient the surgeon to the position of the appendix. Inspection will also alert surgeon to any anatomic variation or pathological conditions that may be relevant (e.g. peritonitis).

17. Procedure: Key Steps (cont.) Step 3: Expose appendix The bowel is gently retracted rostrally using atraumatic graspers to allow access to appendix. Step 4: Locate and separate appendicular artery The mesoappendix is separated from the body of the appendix, and the mesenteric fat is separated to reveal the appendicular artery. This is best done using the “spreader” action of a dissector.

18. Procedure: Key Steps (cont.) Step 5: Divide appendix from cecum Using an endoloop, two loops are placed proximal to the cecum, and a third loop is placed 1-2 cm distally to these. The appendix is then divided between the two proximal and 3rd distal loops using scissors or cautery. Staples may be substituted for loops. UK surgeons tend to use the Endo GIA tool, which simultaneously seals and cuts, eliminating the need for loops or staples. Step 6: Divide appendicular artery The artery is divided using the Endo GIA or the endoloop method described above (two ligatures proximally, one distally).

19. Procedure: Key Steps (cont.) Step 7: Extract appendix A fourth port (10 mm) may be placed containing the extraction tube. Alternately, the camera may be withdrawn and the existing 10 mm port used for extraction (a 5 mm camera is inserted into one of the smaller ports in these cases). In either case, an extraction tube is placed through the appropriate 10 mm port, and the extraction bag tool is placed through the extraction tube. The appendix is placed in the capture bag, and removed from the abdomen through the extraction tube. *(It should be noted that in the accompanying video, a non-conventional extraction technique is used, probably because the appendix had already ruptured and the extraction bag was deemed unnecessary. The image above comes from a different case.)

20. Procedure: Key Steps (cont.) Step 8: Irrigate The abdominal cavity should be irrigated thoroughly with sterile saline and suctioned clean several times. In the event of a rupture, great care should be taken to ensure all pus or other infectious fluids have been removed. Step 9: Final inspection The abdominal and pelvic cavities are inspected one final time for any signs of infection, errors, or other potential complications of which the surgeon might need to be aware. This can often be done simultaneously with irrigation.

21. Key Step times for reference video Title of video: “Dr. Iocono, Laparoscopic Appendectomy 03/8/2010” • Sedation, insufflation, umbilical port and trocar/laparoscope insertion are achieved at time 0 (prior to video) • Some basic inspection/orientation from time 0:30 – 1:45 • 2nd port inserted at 1:45; 3rd port inserted at 3:40 • Inspection of abdominal cavity 4:20-5:00 • Bowel retracted to expose bladder 5:00 – 5:25 • Appendicular perforation apparent at 5:30 • Separation of mesoappendix from body of appendix ~6:45 – 7:30 • Appendix position appropriately and divided 7:30- 9:50 • 4th port inserted at 10:10 • Appendicular artery divided at 11:33 • Appendix removed through 4th port at 14:00 • Irrigation, suction, and final inspection occur from 14:10 – 31:30 (about 17 minutes)

22. Complications • Rupture: more advanced inflammation is more susceptible to rupture during the procedure. A rupture during the procedure warrants extra care in irrigation, and extra care in inspecting for pus and signs of peritonitis before closing. A pre-operative rupture may warrant more aggressive post-operative antibiotic course. • Intra-abdominal abcess: drained surgically or with CT-guided needle • Adhesions • Wound-site infection

23. Post-Operative care • Hospital stay time 24-48 hours • Patient can walk around usually after 12 hours • Antibiotics • Pain management • Resume normal activities within 2 weeks

24. Sources • Mohan, V., M.D. (2010, March 1). Appendicitis. Retrieved from http://www.webmd.com/digestive-disorders/digestive-diseases-appendicitis • Hunter, Any. (2008, June 4). How Your appendix works. Retrieved from http://health.howstuffworks.com/appendix1.htm • Navez, B. (2001, April). Laparoscopic appendectomy. Retrieved from http://chapters.websurg.com/technique/index.php?full=1&doi=ot02en213 • McCarthy, Arthur C., MD, History of Appendicitis Vermiformis, its diseases and treatment. 1927, University of Louisville http://www.innominatesociety.com/Articles/History%20of%20Appendicitis.htm • Bhattacharya K., Kurt Semm: A laparoscopic crusader. J Min Access Surg [serial online] 2007 [cited 2010 Apr 9];3:35-6. Available from: http://www.journalofmas.com/text.asp?2007/3/1/35/30686