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Transanal specimen retrieval using the transanal endoscopic microsurgery (TEM) system in minimally invasive colon resection

Abstract

Back ground

During laparoscopic colectomy, the specimen is retrieved through substantial incisions, which increase postoperative pain, wound infections, and incisional hernias [13]. In the era of natural orifice transluminal endoscopic surgery (NOTES), incisionless transrectal approaches for colon resections have been investigated with promising results [46]. Transanal retrieval of the colonic specimen in laparoscopic colectomy has been described but not widely adopted [712], although it seems to be an appealing step towards NOTES colectomy. We have used the TEM rectoscope (Richard Wolf Medical Instruments Corporation, Vernon Hills, IL, USA) as a retrieval conduit, which facilitates transanal extraction of the specimen, and protects the rectal edge and anal sphincter during laparoscopic left colectomy.

Technique

After standard laparoscopic dissection and vascular control, the colon is divided distally, whereas the proximal colonic end is ligated to prevent fecal spillage. The TEM rectoscope is advanced through the rectal stump. The proximal colon is grasped and withdrawn through the rectoscope. The colon is stapled off proximally, and the specimen is removed transanally. An anvil is introduced into the pelvis through the rectoscope and inserted in the descending colon through a colotomy, which is subsequently sealed with an endo-loop. The rectoscope is withdrawn, and the rectal stump edge is stapled off. A circular stapler is introduced in the rectum, and end-to-end anastomosis is performed.

Discussion

The extraction incisions in laparoscopic colectomy increase invasiveness and compromise the “purity” of the laparoscopic approach. Retrieval of the specimen through natural orifices constitutes a stepping stone in the transition to future incisionless NOTES colectomy. These techniques have not been widely adopted because of technical difficulties and concerns regarding trauma. In our experience, transanal retrieval of the colonic specimen is hampered by friction between the specimen and the rectum, which requires countertraction to the edges of the open rectal stump. These manipulations are time consuming and increase the risk of injury, even when retrieval bags are used [13, 14]. The TEM rectoscope allows gentle dilation of the anus, provides stability during extraction, and protects the edges of the rectum, therefore decreasing the risk of rectal or anal canal injuries. It maintains pneumoperitoneum and eases retrieval of the specimen through the large-caliber metal conduit. Alternative options in the form of a rigid conduit would be the use of the transanal endoscopic operation device (Karl Storz, Tuttlingen, Germany) [15], the plastic McCartney tube (Tyco Healthcare, Norwalk, CT, USA) used for transvaginal operations [16], or an anecdotally reported, “homemade” rectoscope from a customized polyvinyl chloride tube. Potential limitations of this technique include the increased cost of acquiring and using the TEM rectoscope, although this should not be significant if this reusable system is already available for transanal procedures. The 4 cm diameter of the TEM rectoscope can also be a limiting factor in the case of large, bulky, incompressible specimens or large colonic tumors. We have also avoided using this technique in patients with preexisting anal sphincter dysfunction and fecal incontinence, as well as in the presence of severe perianal disease (i.e., fistulae or fissures). Naturally, the open lumen in the peritoneal cavity raises concerns regarding bacterial contamination and potential tumor cell seeding in cases of cancer. Preliminary evidence on these issues comes from TEM and NOTES research without obvious signs of increased risk currently [17, 18]. We do not perform preoperative bowel preparation for our colectomies, but we do perform rectal enema with Betadine solution at the beginning of the procedure.

Conclusions

Use of the TEM system facilitates transanal removal of the specimen and protects the anorectum during laparoscopic colectomy.

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Author information

Correspondence to Lee L. Swanström.

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Makris, K.I., Rieder, E., Kastenmeier, A.S. et al. Transanal specimen retrieval using the transanal endoscopic microsurgery (TEM) system in minimally invasive colon resection. Surg Endosc 26, 1161–1162 (2012) doi:10.1007/s00464-011-2021-6

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Keywords

  • Laparoscopic Colectomy
  • Rectal Stump
  • Specimen Extraction
  • Disclosure Author
  • Laparoscopic Sigmoid Colectomy