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22 Hepatic Abscess
235
d–f). The aspirate grew Escherichia coli
Fr locking loop catheter was placed (
catheter drainage, an abscessogram was performed, which demonstrated no significant residual
weeks of active
Fig. 22.3 A 67-year-old female presented with a large symptomatic simple appearing cyst (14.4 × 11.8 × 15.9 cm) in the dome of the liver (a) and underwent laparoscopic cyst wall
fenestration and cyst wall fulguration. She was discharged home the next day but presented to the emergency department on postoperative day 7 with worsening right shoulder and flank
pain with a leukocytosis of 12.8 K/uL. A CT of the abdomen and pelvis was obtained, which demonstrated a low attenuating fluid collection with a thin rim of peripheral enhancement
adjacent to the site of prior laparoscopic cyst fenestration with a small focus of air (b). The fluid collection was accessed via an intercostal approach underneath the 11th rib posteriorly
utilizing US guidance through the rib interspaces with aspiration of serosanguinous fluid (c). A limited noncontrast CT performed after placement of the needle under US guidance
confirmed appropriate positioning of the needle and due to the concern for an infected collection, a 10
and the patient was treated with appropriate oral antibiotics. After 2
collection or communication to the biliary system and the catheter was uneventfully removed (g)
236 M. A. Woods et al.
drainage or is frankly purulent, a catheter can be placed in the same setting utilizing the Seldinger technique. Catheter drainage may also be per­formed utilizing the trocar technique and a multi­side hole, locking catheter of various sizes can be placed. Abscess drainage catheter monitoring and care is of critical importance to ensure adequate drainage. Abscess catheters are usually flushed up to three times daily with sterile normal saline to prevent clogging. The output from the catheter should be recorded on a daily or per shift basis, and the presence of high outputs is suggestive of a fistula to the cavity. Clinical parameters such as drain output, hemodynamic status, leukocyte count, and culture results should be followed on a daily basis in the early postprocedure period to evaluate the patient’s clinical progress. Catheters can be placed to either suction or gravity drain­age. Passive drainage may minimize catheter oc­clusion secondary to aspirated debris within the abscess cavity; however, active drainage (suc­tion) may result in more rapid evacuation of the abscess with opposition of the abscess cavity wall. Patients who do not respond clinically to percutaneous drainage catheter placement should be further evaluated with cross-sectional imaging, preferably CT, to assess the adequacy of catheter placement and/or the development of new po­tential sites of infection. In the event of catheter malfunction or inadequate drainage of the col­lection, the drainage catheter can be exchanged over a wire for larger bore catheters; however, in some cases of significant loculation or debris, more than one catheter may be required for ad­equate percutaneous management. Another op­tion to aid in the success of percutaneous abscess drainage is the administration of thrombolytic agents through the abscess drainage catheter. If follow-up imaging demonstrates a persistent ab­scess cavity despite optimal drain placement and sizing, tissue-type plasminogen activator (tPA) can be instilled into the cavity to promote further drainage. Common practice is to dilute 4–6 tP
A in 25 infuse through the catheter and allow it to dwell for 30 is replaced to passive or active drainage, and the outputs from the catheter are monitored closely.
mL of
min–1 h. Afterward, the drainage catheter
sterile 0.9
% normal saline
mg of
and
This technique can be performed from once per day up to three times per day as long as it is effec­tive. Thrombolytic therapy in abscess cavities can be effective due to the presence of a fibrin matrix within the cavity which when administered can result in breakdown of loculations and reduction of the viscosity of the fluid within the collection. Thrombolytic therapy has proved to be a safe and effective therapy even in the postoperative period with minimal to no risk of bleeding [45]. Drain­age is usually continued until the patient demon­strates clinical improvement and drainage output is less than 10–20 time required for successful percutaneous cath­eter drainage is highly variable and dependent on multiple patient and infection site factors. A fluo­roscopic abscessogram can be performed prior to catheter removal to assess the residual size of the cavity and the presence of fistulization to the bowel or biliary system if indicated.
Success rates for image-guided needle aspira-
tion of simple pyogenic liver abscesses less than
cm in size approach 100 % with minimal com-
5 plications rates have varied significantly in the literature from 66 to 100 patient factors. Higher failure rates have been associated with the presence of advanced malig­nancy, particularly necrotic infected tumors, and the presence of fistulization to an obstructed bili­ary system [39, 43]. Aggressive management of biliary obstruction/injury in the setting of postop­erative abscess formation is of critical importance to ensure resolution. The risk of complications is minimal with complications such as pneumotho­rax, empyema, intraperitoneal hemorrhage, and mild pain being the most frequently reported.
[38, 41, 42]. Catheter drainage success
mL/day [46
% likely secondary
]. The length of
to abscess and
Five Key Points on How to Avoid Complications
1. Assure well-perfused liver remnant following hepatectomy
2. Assure liver remnant has adequate biliary drainage following hepatectomy
3. Assure biliary-intestinal anastomoses are well perfused
22 Hepatic Abscess
237
4. Assure biliary-intestinal anastomoses are widely patent at the time of surgery
5.
Limit biliary stents as much as possible
Five Separate Key Points on Diagnosing and/or Managing the Complication
1. Obtain contrasted CT or MRI for unexplained postoperative fever
Utilize interventional radiologic
2.
drainage
whenever it is technically feasible
Utilize broad-spectrum antibiotics
3.
once diag-
nosed
Utilize surgical
4.
approach only for refractory
cases
Multidisciplinary team input is critical
5.
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-
Hepaticojejunostomy Anastomotic Strictures
François Cauchy and Jacques Belghiti
23
Introduction
For patients requiring bilioenteric anastomosis, Roux-en-Y hepaticojejunostomy (HJ) remains the procedure of choice in the vast majority of the cases. Several complications may occur fol­lowing the creation of HJ. These include anasto­motic strictures, stone formation, reflux of gas­trointestinal content into the biliary tree, obstruc­tion of the Roux-en-Y anastomosis [1], and both de novo [2] and recurrent malignant disease [3]. HJ anastomotic stricture, which is defined as the narrowing of the anastomosis leading to biliary obstruction and retention, accounts for more than 50 % of these complications. Indeed, state-of­the-art hepaticojejunostomy requires precise cre­ation of a (1) tension-free, (2) widely patent (3) mucosa-to-mucosa anastomoses using (4) well­vascularized bile ducts that (5) drain all parts of the liver. The lack of one or several of these con­ditions dramatically jeopardizes the quality of the anastomosis and puts the patient at risk of stric­ture development. HJ anastomotic strictures may cause recurrent cholangitis with life-threatening risks and, after several years, may also evolve toward biliary cirrhosis, hepatic failure, or even death. However, both diagnosis and treatment
J. Belghiti () · F. Cauchy Department of HPB Surgery and Liver Transplantation, Beaujon Hospital, Clichy, France e-mail: Jacques.belghiti@bjn.aphp.fr
F. Cauchy e-mail: fafatoubib@gmail.com
of HJ stricture may be difficult. While surgical repair was the treatment of choice several years ago, there has been growing interest in more con­servative approaches with the development of balloon dilatation and stricture stenting. Hence, modern management of these strictures is often multimodal, requiring repeated therapeutic ses­sions and combined approaches.
Diagnosis
Clinical and Biological Presentation
HJ stricture progressively leads to retention of contaminated bile. In this setting, any mild el­evation of g-GT (gamma-glutamyl transferase) and trasnsaminase level and also transitory fever should highlight the possibility of a nascent anas­tomotic stricture. Once the stricture occurs, pre­senting symptoms are dominated by cholangitis in 80 % of the cases, with isolated jaundice oc­curring in only 15 % of the cases [1]. However, these symptoms are not specific and may be re­lated to other causes of HJ malfunction, including intrahepatic stone formation without HJ stenosis, stenosis of the Roux-en-Y anastomosis, or the so­called sump syndrome, which is defined as the reflux of gastrointestinal content into the biliary tree because of inadequate length of the Roux-en­Y loop [4]. Likewise, in patients operated on for malignant disease, surgeons should also system­atically rule out the possibility of loco-regional disease recurrence [3]. Finally, in transplanted
T. M. Pawlik et al. (eds.), Gastrointestinal Surgery, DOI 10.1007/978-1-4939-2223-9_23, © Springer Science+Business Media New York 2015
239
240 F. Cauchy and J. Belghiti
Fig. 23.1 Hepaticojejunostomy stenosis following early repair of a bile duct injury during laparoscopic cholecys­tectomy in a 27-year-old women. This patient was suc-
patients, impairment of liver functional tests or symptoms such as jaundice or cholangitis may account for non-anastomotic biliary strictures, graft rejection, viral infections, arterial complica­tions, and recurrent primary disease. In this set­ting, diagnosis of HJ strictures should therefore be retained only after complete workup ruling out other complications has been performed.
Morphological Evaluation
Even though ultrasound (US) examination and computed tomography (CT) have no place in the direct visualization of anastomotic strictures, they should be routinely performed in the man­agement of these patients. Indeed, both US and CT scan may be of value in the evaluation of nonspecific indirect signs of strictures and may allow for the assessment of differential diagnoses and stricture-related complications. Historically, diagnosis was achieved using percutaneous tran­shepatic cholangiography (PTC) (Fig. 23.1a), which may also allow for direct visualization of the strictures using cholangioscopy [5]. How­ever, since this invasive procedure is associated with both risk of vascular injury in approxi­mately 2 % of the cases [6] and septic complica­tions, it should now be restricted to therapeutic purposes or rare situations of inconclusive mag­netic resonance (MR) cholangiography. Indeed,
cessfully managed using repeated sessions of percutane­ous dilatation. a Percutaneous cholangiography. b Mag­netic cholangiography
MR cholangiography has become the standard morphological examination in the assessment of HJ stenosis and allows direct visualization of the strictures with a sensitivity reaching more than 90 % (Fig. 23.1b) [1]. Other anecdotal diagnostic modalities include endoscopic retrograde cholan­giography, which has been reported to be feasible in 58–93 % of HJ patients [79], or percutaneous transjejunal endoscopy, which may be facilitated in patients with prior subcutaneous fixation of the Roux-en-Y loop [10, 11], but has been also successfully reported using US-guided puncture of non-fixed loops in experienced hands [12, 13].
Incidence and Risk Factors According to the Clinical Context
Since creation of HJ may be required in various surgical situations, both incidence and risk fac­tors of HJ strictures widely vary according to the clinical context (Table 23.1).
Iatrogenic Bile Duct Injury
Since the description of the Hepp and Couinaud biliary-enteric anastomosis using the extrahe­patic left hepatic duct [14], HJ has remained the standard procedure in the surgical management of most postcholecystectomy bile duct injuries.
Table 23.1 Incidence and risk factors of hepaticojejunostomy strictures according to the clinical situation
Indication for HJ Incidence of
strictures (%)
Bile duct injury 5–22 Sepsis during repair
Liver transplantation (LT) Deceased donor 2–21 Primary sclerosing cholangitis Living donor 6–22 Graft related factors:
Pancreatic head resection 2.6 – Choledochal cyst excision Children 0–6 Type Iva cysts Adults 5–24 Short duration of symptoms
Risk factors
Absence of bile duct dilatation Postoperative biliary leakage
Steatosis, Prolonged cold ischemia time, donor age > 50 years Technical factors: Biliary anatomical variation, small ducts, no microsurgical repair Postoperative complications: Biliary leakage, arterial thrombosis, CMV infection
Large-sized cysts
10 years
Age >
24123 Hepaticojejunostomy Anastomotic Strictures
In this setting, HJ anastomotic strictures never­theless occur in 5–22 % [1519] of the patients. The absence of bile duct dilatation has long been incriminated as the most prominent risk factor for the development of HJ stricture following bile duct injury repair [16], leading some authors to either postpone the intervention until bile duct dilatation was obtained or to routinely use trans­anastomotic stents on non-dilated bile ducts [20]. However, several studies have highlighted that early repair achieved similar results as delayed biliary reconstruction provided that the proce­dure was performed by a specialist hepatobiliary surgeon [21]. This clearly emphasizes the need for early diagnosis and referral to a specialized HPB unit. Other risk factors for the development of HJ stricture include the presence of biliary peritonitis at repair [22] and postoperative com­plications following the repair, especially biliary leakage [16], which both intuitively increase the risk of postoperative inflammatory stenosis. Fi­nally, the impact of an associated right hepatic arterial injury in the occurrence of anastomotic stricture is still a matter of ongoing debate [15,
21, 22], with several arguments suggesting a role
of arterial injury in favoring ischemia and retrac­tion of the bile ducts and others supporting a rapid revascularization through the anastomosis.
In our experience, routine CT scan with vascular reconstruction is always performed to preopera­tively assess the arterial vascularization. Simi­larly, we believe that both operative evaluation of the biliary vascularization and confection of high anastomoses may help to prevent postoperative strictures. Finally, we consider that the existence of an associated vascular injury should probably lead to considering early repair with the utmost caution.
Liver Transplantation (LT)
In deceased donor liver transplantation (LT), HJ is more and more restricted to a limited number of situations including large disparity in size be­tween the recipient’s bile duct and the donor’s bile duct, liver retransplantation, LT for primary sclerosing cholangitis, and biliary atresia. In these situations, the incidence of HJ strictures ranges from 2 %, in the case of liver retransplantation [23], to 21 % in patients with PSC [24]. In this latter setting, it has been recently suggested that duct-to-duct anastomosis (DDA) provided better long-term functional results than HJ [24] without increasing the risk of disease recurrence [25, 26], supporting that it should be probably preferred
242 F. Cauchy and J. Belghiti
over HJ. In living donor LT, no randomized study has yet documented the superiority of DDA over HJ. Hence, HJ is still performed in 20–40 % of the cases [27, 28]. In this latter setting, biliary anastomotic strictures represent the Achilles heel of these procedures with reported rates ranging from 6 to 22 % [29, 30]. The occurrence of HJ strictures may be the consequence of: (1) im­paired graft quality as evidenced by increased rates of HJ strictures with significant steatotic grafts [31, 32] with prolonged cold ischemia time [33] or grafts from donors aged > 50 years [30]; (2) technical factors including biliary anatomical variations [31] requiring > 1 biliary anastomosis [30] and small donor right or left bile ducts; [31]; and (3) postoperative complications, mainly bili­ary leakage [30, 34], hepatic artery thrombosis [35], CMV infection [35], and acute cellular re­jection [33]. Obviously, prevention of HJ stric­tures in patients undergoing LDLT may essen­tially be achieved by improving the selection of the grafts with the systematic use of preoperative donor liver biopsy but also with refinements in surgical technique. In this latter setting, Lin et al. have emphasized the value of routine microsurgi­cal biliary reconstruction in decreasing the num­ber of anastomotic strictures regardless of both types and number of ducts [27].
Pancreatic Head Resection
Biliary complications following pancreatic head resection are often neglected and overlooked by those involving the pancreatic anastomosis. Hence, only one study has to date specifically examined the incidence of biliary strictures after pancreaticoduodenectomy (PD) [3]. In this large single-center study analyzing 1595 patients un­dergoing PD over 8 years, 42 (2.6 %) patients ex­perienced HJ stricture and median time for stric­ture occurrence was 13 (median: 1-98) months. No significant risk factor for the development of strictures was observed with only marginal in­fluence of preoperative biliary drainage and no impact of either common bile duct size or post­operative biliary leakage. Interestingly, the rates of strictures were also strictly similar in patients
operated on for benign and malignant disease. In this latter context, less than 10 % of the patients were found to have recurrent neoplastic disease involving the bilioenteric anastomosis. Of these, none were operated on for pancreatic or ampul­lary carcinoma supporting that development of a biliary stricture in these patients is usually be­nign. However, all patients with malignant anas­tomotic strictures carried a diagnosis of cholan­giocarcinoma. This result, which is in line with the reported 16 % rate of tumor recurrence at the proximal stump in patients operated on for extra­hepatic cholangiocarcinoma [36], suggests that anastomotic tumor recurrence should be system­atically ruled out in this subset of patients.
Choledochal Cyst
In the long-term follow-up of patients undergo­ing choledochal cyst excision, the development of postoperative HJ anastomotic stricture widely varies according to the age of the patient at the time of surgery. Indeed, the rates of HJ stric­tures range from virtually 0 to 6 % in children [37, 38] when the anastomosis is performed on the hepatic hilum, while it may reach up to 24 % in adults [39]. This finding is probably related to the fact that inflammation of the cyst wall is mild in children under 10 years of age and more se­vere in older children and adults, likely resulting from severe histological damage to the common hepatic duct used for a bilioenteric anastomosis [40]. Other risk factors for the development of HJ after choledochal cyst excision include shorter duration of symptoms [39], increased size of the cyst [39], and type IVa cysts [40] where inflam­mation is associated with histological damage of the common hepatic duct after HJ and may lead to severe scaring at the bilioenteric anastomosis [40]. Altogether, these results suggest that the balance between the risks of malignant transfor­mation and the risks of invalidating symptoms following HJ stricture, especially in adults with type IVa cysts, should lead to cautious consid­eration of surgery on a case-by-case basis rather than on a systematic operative approach basis. In this situation, definition of a subgroup of patients
24323 Hepaticojejunostomy Anastomotic Strictures
Fig. 23.2 Proposed management of patients with he- paticojejunostomy strictures. In patients with isolated HJ strictures, first-line treatment should be as much conser­vative as possible. Surgery should remain a second-line
at low risk of malignant transformation would probably allow avoiding unnecessary procedures at extremely high risk of postoperative complica­tions.
Therapeutic Options
In patients with HJ strictures, a multimodal and gradual management with repeated treatment sessions and a combination of several approach­es is often required (Fig. 23.2). Treatment op­tions, which include conservative management with endoscopic, percutaneous transhepatic, or transjejunal balloon dilatation and surgery from revisionary HJ to LT, depend on the clinical situ­ation and the existence of associated complica­tions. In this setting, the Terblanche classification [41], which was designed for the assessment of biliary repair following bile duct injury, strati­fies the functional results of HJ into IV grades (Table 23.2) and may be of value in the analy-
treatment after failure of well-conducted conservative management or in rare cases of associated Roux-en-Y malfunction
sis of the efficacy of the management of these strictures.
Conservative Management
Choice of the Approach
The percutaneous approach remains the approach of choice with reported therapeutic success rates reaching 90–100 % [42, 43]. In this setting, a multistep strategy is generally undertaken. The first step usually consists in transhepatic chol­angiography and external catheter drainage. A single-puncture technique is used whenever di­rect insertion of a thin wire offers a suitable ap­proach to the biliary system. Otherwise, a com­mon double-puncture technique is performed. Percutaneous transhepatic tracts are created to ensure complete drainage of all excluded ter­ritories. Once the bilioenteric stricture has been passed, insertion of one or several external cath-
244 F. Cauchy and J. Belghiti
Table 23.2 Classification of the functional results of hepaticojejunostomies. (Derived from Telbranche et al. [41])
Grade I. No biliary symptoms Grade II. Transitory symptoms, currently no symptoms Grade III. Clearly related symptoms requiring medical therapy Grade IV. Recurrent stricture requiring correction or related death
eters allows drainage of the entire biliary tree above the stricture. When present, small biliary tract stones might be removed using irrigation with saline solution or may be pushed forward through the bilioenteric anastomosis [5]. On the other hand, large stones might be removed after percutaneous electrohydraulic lithotripsy under cholangioscopic guidance [5, 42]. The second step is usually performed between 3 and 7 days later. An angioplasty balloon catheter is inserted across the stenosis and inflated gradually. There­after, stenting is achieved using an internal–ex­ternal biliary drainage or wall-stent placement. Control cholangiography with catheter exchange and complementary dilatations are performed every 6 weeks. When no residual stenosis is ob­served on at least two consecutive sessions, the catheter is removed and the patient is followed regularly to detect any recurrent stricture.
Recently, several teams have reported their results using endoscopic retrograde balloon dila­tation. This approach, which may facilitate both multiple stent placement [7, 9] and use of litho­tripsy, however, currently only provides success rates of 70 % cases using single-balloon entero­scope [7]. Even though endoscopy may be facili­tated with the use of short-limb Roux-en-Y [44] reconstruction or positioning of the Roux-en-Y loop on the duodenum, it should be restricted to experienced centers in the setting of therapeutic evaluation. The percutaneous transjejunal ap­proach represents a valuable alternative to the endoscopic approach with satisfactory long-term results but is also restricted to very few experi­enced centers [12, 13]. Finally, the “rendez-vous” technique, which combines both endoscopic and percutaneous approaches, may be useful in com­plex situations. However, in a setting of HJ stric­ture, this strategy remains clearly marginal with only limited reported experience [45, 46].
To Stent or Not to Stent?
The rationale of using metallic wall-stent would be to allow limiting the number of procedures and decrease hospital stays [47]. However, de­spite initial promising results and high primary technical success rates [48, 49], long-term results of benign biliary stricture treatments by metallic stents have been tempered by high rates of late re-occlusion [50]. On the other hand, retrievable covered stent seems to be a good alternative to shorten treatment duration compared to interpo­sition of an internal–external catheter. However, the risk of branching bile duct occlusion limits its use in the setting of living donor LT recipients owing to high frequency of complex biliary anas­tomotic strictures.
Periprocedural Management
Preanesthetic consultation and routine blood tests including a coagulation profile are systematically required. Similarly, the vast majority of the pa­tients have contaminated bile, and it is mandatory to systematically start antibiotherapy prophylaxis before the procedure in order to prevent the oc­currence of severe septic complications during manipulation of the bile ducts. Antibiotics are generally continued for at least 2–5 days follow­ing the procedure. Since most of the patients will require several therapeutic sessions, it is impor­tant to adapt the antibiotics to the microbiologi­cal findings of previous interventions. After the procedure, occurrence of blood in the drainages should lead to immediate elimination of vascular complications such as active hemorrhage, hema­toma, or pseudo-aneurism on CT scan. Similarly, in patients with external drainage, tubes should be flushed daily with 5–10 ml of saline to ensure adequate bile outflow and bile loss should be rig­orously compensated. If occlusion is suspected in the absence of bile outflow, proper fixation of