Management of Afferent Loop Obstruction: Reoperation Or Endoscopic and Percutaneous Interventions
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See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/282163026 Management of afferent loop obstruction: Reoperation or endoscopic and percutaneous interventions Article in World Journal of Gastrointestinal Surgery · September 2015 DOI: 10.4240/wjgs.v7.i9.190 CITATIONS READS 32 427 2 authors, including: Konstantinos Tsalis Aristotle University of Thessaloniki 115 PUBLICATIONS 976 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: Laparoscopic liver resection using ICG green visualization of hepatic structures View project Laparoscopic liver resection using ICG green visualization of hepatic structures View project All content following this page was uploaded by Konstantinos Tsalis on 26 May 2017. The user has requested enhancement of the downloaded file. Submit a Manuscript: http://www.wjgnet.com/esps/ World J Gastrointest Surg 2015 September 27; 7(9): 190-195 Help Desk: http://www.wjgnet.com/esps/helpdesk.aspx ISSN 1948-9366 (online) DOI: 10.4240/wjgs.v7.i9.190 © 2015 Baishideng Publishing Group Inc. All rights reserved. MINIREVIEWS Management of afferent loop obstruction: Reoperation or endoscopic and percutaneous interventions? Konstantinos Blouhos, Konstantinos Andreas Boulas, Konstantinos Tsalis, Anestis Hatzigeorgiadis Konstantinos Blouhos, Konstantinos Andreas Boulas, Anestis Abstract Hatzigeorgiadis, Department of General Surgery, General Hospital of Drama, 66100 Drama, Greece Afferent loop obstruction is a purely mechanical comp- lication that infrequently occurs following construction Konstantinos Tsalis, D’ Surgical Department, “G. Papanikolaou” of a gastrojejunostomy. The operations most commonly Hospital, Medical School, Aristotle University of Thessaloniki, associated with this complication are gastrectomy 54645 Thessaloniki, Greece with Billroth Ⅱ or Roux-en-Y reconstruction, and pancreaticoduodenectomy with conventional loop or Author contributions: Blouhos K designed the research; Boulas Roux-en-Y reconstruction. Etiology of afferent loop KA performed the literature research and wrote the paper; obstruction includes: (1) entrapment, compression Hatzigeorgiadis A substantially contributed in editing the English and kinking by postoperative adhesions; (2) internal language of the manuscript; Tsalis K and Hatzigeorgiadis A made herniation, volvulus and intussusception; (3) stenosis critical revisions related to important intellectual content of the due to ulceration at the gastrojejunostomy site and manuscript and had the final approval of the version of the article radiation enteritis of the afferent loop; (4) cancer to be published. recurrence; and (5) enteroliths, bezoars and foreign bodies. Acute afferent loop obstruction is associated with Conflict-of-interest statement: None. complete obstruction of the afferent loop and represents a surgical emergency, whereas chronic afferent loop Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external obstruction is associated with partial obstruction. reviewers. It is distributed in accordance with the Creative Abdominal multiple detector computed tomography is Commons Attribution Non Commercial (CC BY-NC 4.0) license, the diagnostic study of choice. CT appearance of the which permits others to distribute, remix, adapt, build upon this obstructed afferent loop consists of a C-shaped, fluid- work non-commercially, and license their derivative works on filled tubular mass located in the midline between the different terms, provided the original work is properly cited and abdominal aorta and the superior mesenteric artery with the use is non-commercial. See: http://creativecommons.org/ valvulae conniventes projecting into the lumen. The licenses/by-nc/4.0/ cornerstone of treatment is surgery. Surgery includes: (1) adhesiolysis and reconstruction for benign causes; Correspondence to: Konstantinos Andreas Boulas, MD, and (2) by-pass or excision and reconstruction for ma- MSc, Department of General Surgery, General Hospital of lignant causes. However, endoscopic enteral stenting, Drama, End of Hippokratous Street, 66100 Drama, transhepatic percutaneous enteral stenting and direct Greece. [email protected] percutaneous tube enterostomy have the principal role Telephone: +30-693-7265675 in management of malignant and radiation-induced Fax: +30-251-3501559 obstruction. Nevertheless, considerable limitations exist as a former Roux-en-Y reconstruction limits endoscopic Received: March 23, 2015 access to the afferent loop and percutaneous appro- Peer-review started: March 26, 2015 aches for enteral stenting and tube enterostomy have First decision: June 3, 2015 Revised: June 21, 2015 only been reported in the literature as isolated cases. Accepted: July 21, 2015 Article in press: July 23, 2015 Key words: Afferent loop; Obstruction; Reoperation; Published online: September 27, 2015 Endoscopy; Enterostomy WJGS|www.wjgnet.com 190 September 27, 2015|Volume 7|Issue 9| Blouhos K et al . Management of afferent loop obstruction © The Author(s) 2015. Published by Baishideng Publishing of ALO (Table 1). Risk factors for ALO include: (1) Group Inc. All rights reserved. Redundant (longer than 30-40 cm) and antecolic afferent loops which are more prone to kinking, volvulus, and Core tip: Management strategy of afferent loop entrapment by adhesions; and (2) Improperly closed obstruction (ALO) depends on: (1) the benign or mesocolic defects which predispose to internal herniation malignant nature of the obstruction. ALO caused by of the retrocolic afferent loop[9]. a benign lesion needs definitive repair of the primary cause by surgery. ALO caused by a malignant lesion needs palliative treatment (percutaneous and endoscopic INCIDENCE interventions, by-pass surgery) or excision; and (2) the The incidence of ALO after distal gastrectomy with site of obstruction. An obstruction at the inframesocolic Billroth Ⅱ or Roux-en-Y reconstruction has been reported portion of the afferent loop can be easily reconstructed, [10] to be 0.3%-1.0% . Although there are several specific whereas an obstruction at the supramesocolic portion predisposing factors for ALO following laparoscopic ga- needs copious mobilization and may require revision strectomy such as partial omentectomy and antecolic of the hepaticojejunostomy or pancreaticojejunostomy anastomosis, the incidence of ALO after open and and/or a modified Puestow procedure in the setting of a laparoscopic surgery is similar. Kim et al[11] in their re- preceded pancreaticoduodenectomy. trospective cohort study, reported 4 (1.01%) patients who developed ALO among 386 gastric cancer patients Blouhos K, Boulas KA, Tsalis K, Hatzigeorgiadis A. Man- submitted to laparoscopic distal gastrectomy with Bi- agement of afferent loop obstruction: Reoperation or endoscopic llrothⅡ reconstruction. The interval between the initial and percutaneous interventions? World J Gastrointest Surg gastrectomy and the operation for ALO ranged from 4 2015; 7(9): 190-195 Available from: URL: http://www.wjgnet. to 540 d (median 33 d). The causes of ALO included com/1948-9366/full/v7/i9/190.htm DOI: http://dx.doi.org/10.4240/ adhesions in 2 patients and internal herniation in 2 wjgs.v7.i9.190 patients. All patients recovered following emergency operations[11]. Aoki et al[12] in their retrospective cohort study, reported 4 (0.2%) patients who developed ALO among 1908 gastric cancer patients submitted to distal DEFINITIONS gastrectomy with Roux-en-Y reconstruction. The causes of the ALO included internal herniation in two patients, Creation of a gastrojejunostomy leaves a segment of adhesions in one patient, and peritoneal recurrence in proximal small bowel, most commonly consisting of one patient. The interval between the initial gastrectomy duodenum and proximal jejunum, lying upstream from and emergency operations for ALO ranged from 3 wk to the gastrojejunostomy. This limb of intestine conducts bile, 2 years (median 5 mo). All patients recovered following pancreatic juices, and other proximal intestinal secretions emergency operations. toward the gastrojejunostomy and is termed the afferent There are limited data on the incidence of ALO after [1] loop . Afferent loop obstruction (ALO) is a purely pancreaticoduodenectomy, especially among long-term mechanical complication that infrequently occurs following pancreatic cancer survivors (> 2 years). In one of the construction of a gastrojejunostomy. The operations most few studies in the literature, Pannala et al[13] evaluated commonly associated with this complication include total the incidence of ALO in pancreatic cancer patients su- gastrectomy with loop esophagojejunostomy and simple bmitted to pancreaticoduodenectomy. Pannala et al[13] or pouch Roux-en-Y reconstruction, partial gastrectomy in their retrospective cohort study, reported 24 (13%) with Billroth Ⅱ and Roux-en-Y reconstruction, and patients who developed ALO among 186 pancreatic pancreaticoduodenectomy with conventional loop and cancer patients treated with pancreaticoduodenectomy. Roux-en-Y reconstruction performed for treatment of Median time to diagnosis was 1.2 years (range 0.03-12.3 [2] benign and malignant causes . years). Obstruction was primarily caused by recurrent pancreatic cancer in 8 patients (33%) and radiation enteritis of the afferent loop in 9 patients (38%)[13]. ETIOLOGY Causes of ALO include: (1) Entrapment, compression and kinking of the afferent loop by postoperative