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ogy.2021.07.001.

Complications in Orthotopic Neobladders

KathrinMeisterhofer, BastianAmend, andArnulfStenzl
14

Introduction

In women, radical cystectomy includes removal of the urinary bladder, distal ureters, uterus, proximal two-thirds of the vaginal anterior wall, both ova­ries, and pelvic lymph nodes. Depending on tumor location, patients’ age, and indication, the vaginal anterior wall and ovaries may be preserved.
The most common indication for cystectomy in women is cancer of the urinary bladder. Other indications for bladder removal are gynecologi­cal tumors or colon carcinoma, although ortho­topic bladder replacement is usually not an option in these cases due to the locally advanced growth. Nononcological indications for cystectomy are a small-capacity bladder, post-radiogenic cystitis, and interstitial cystitis.
Urinary diversions are divided into continent and incontinent (ileal conduit, ureterocutaneos­tomy) solutions. Continent urinary diversions can be subdivided into orthotopic and heterotopic (catheterizable pouches) approaches. This chap­ter focuses on complications of orthotopic ileal neobladders.
Over time, many different forms of neoblad­ders have been described and modied by sur­geons. The variants of neobladders differ in terms of folding techniques of the bowel and reuxing or nonreuxing implantation of the ureters. Cystectomy with urinary diversion can be per­formed either by open surgery or robot-assisted laparoscopy. The complication rate, oncological outcome, and quality of life are all similar for both robotic and open approaches. The surgeon’s experience and institutional volume are more important for the outcome than the technique [1]. Therefore, the procedure should only be per­formed at specialized centers.
The perioperative mortality rate after radical cystectomy is 2.1–3.2% at 30days and 3.4–8% at 90days [2, 3]. Complications can be categorized as early postoperative complications and long­term complications. Therefore, a lifelong follow­ up is needed after a neobladder reconstruction.
This chapter summarizes the complications of orthotopic ileal neobladders and their management.
K. Meisterhofer · B. Amend · A. Stenzl (*) Department of Urology, University Hospital of Tuebingen, Eberhard Karls University, Tuebingen, Germany e-mail: kathrin.meisterhofer@med.uni-tuebingen.de;
bastian.amend@med.uni-tuebingen.de; uro@stenzl.net
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2025 M. Hoffman et al. (eds.), Major Complications of Female Pelvic Surgery,
https://doi.org/10.1007/978-3-031-66772-5_14

Early Postoperative Complications

Perioperative Bleeding Intraoperative bleed­ing may occur during cystectomy in women, especially at the vaginal venous plexus. It corre­sponds to the prostatic venous plexus in men.
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Various hemostyptics can be used. In case of increased blood loss and coagulation disorders, transfusion of red blood cells, platelets, fresh frozen plasma, and specic coagulation fac­tors—depending on specic diagnostics— should be considered. In case of unmanageable intraoperative bleeding, “packing” of the surgi­cal area and a second-look surgery within 72h can be performed.
If postoperative bleeding is suspected, due to hemodynamic instability, increased bloody drainage volumes, drop in hemoglobin, or free uid in sonographic examination, CT scanning should be performed to localize the hemorrhage. Before immediate surgical revision, the possibil­ity of angiographic embolization of the bleeding should be evaluated.
Ileus or Bowel Obstruction An ileus is described in up to 26.9% of cases after radical cystectomy [4]. It may be caused by peritoneal irritation due to peritonitis or urine leakage, adhe­sion formation, or herniation of intestinal loops. Enteral and parenteral bowel stimulation by indi­rect parasympathomimetic drugs is essential in the early postoperative period. If an inserted naso­gastric tube is used, it should be removed as early as possible because its irritation might have a negative inuence on bowel recovery. The diag­nosis of ileus is made clinically or by imaging.
Paralytic ileus can be treated conservatively with forced bowel stimulation and reinsertion of a gas­tric tube. If a mechanical obstruction is highly probable, a surgical revision is indicated.
Insufciency of Intestinal Anastomosis There
are different techniques for performing intestinal anastomosis. While stapled side-to-side or end­to- side anastomosis is technically faster and eas­ier to perform, handsewn end-to-end anastomosis preserves the straight ow of the intestinal con­tents and should therefore be preferred.
Insufciency of intestinal anastomosis is clinically manifested by acute abdominal pain. In addition, air or even stool appears in the drainage. An immediate surgical revision is indispensable in this potentially lethal compli­cation (Fig.14.1).
Insufciency of Urological Anastomosis and Suture Lines The various urological anastomo-
ses include the sutures between the ureter and neobladder and the urethra and neobladder or those of the neobladder itself. Clinically, suture insufciency is manifested by an increased ow rate of the drainage. Therefore, the creatinine level in the drainage should be compared to the serum level. If the levels are identical, a major insufciency is unlikely. In addition, a radio­graphic exclusion of leakage (conventional cys-
Fig. 14.1 Insufciency of intestinal anastomosis
ab
14 Complications in Orthotopic Neobladders
139
togram) should be performed before removing the inserted catheter.
In case of insufciency, a conservative approach with low-pressure drainage should be pursued. If necessary, stents that have already been removed (e.g., catheter, ureteric stents, or additionally nephrostomies) must be reinserted. Surgical revision is rarely required. However, suture insufciency leads to an increased risk of tubular stricture (Fig.14.2).
Vesicovaginal Fistula To avoid a stula between the vagina and neobladder or anastomosis, the suture lines should be kept distant. In addition, an omental ap is usually created and placed around the lowest part of the neobladder. This prevents stula formation and suspends the neobladder oor, reducing the risk of urinary retention by preventing ileal fold formation, as mentioned below (Fig.14.3).
Fig. 14.2 An inconspicuous cystogram (a). Insufciency of the ureteroileal anastomosis (b)
ab
Fig. 14.3 To avoid a vesicovaginal stula (a), an omental ap should be placed around the neobladder (b)
140
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K. Meisterhofer et al.
Urinary Tract Infections (UTIs) Urinary tract infections (UTIs) are one of the most common problems in urinary diversions. They should be rst ruled out before reconstructive urological surgery. In addition, it is recommended to check for signicant bacteriuria before removing cath­eters or stents to reduce the risk of febrile UTI, which can be life-threatening.

Long-Term Complications

Urinary Incontinence Daytime and nighttime continence rates in women with an orthotopic neobladder range from 82 to 95% and from 72 to 86% and are comparable to male patients [5].
For a good functional result, intraoperative preservation of the autonomic nerve bers is mandatory. While the external urinary sphinc­ter is innervated by the pudendal nerve, the proximal urethra is also innervated by sympa­thetic nerves. The sympathetic nerves originate from the sympathetic trunk and reach the pel­vis through the superior and inferior hypogas­tric plexus, with additional bers arising
directly from the sacral nerves. The bers run in front of the common iliac artery and medial to the ureter. If acceptable from an oncological point of view, it is important to preserve these bers, especially when performing a pelvic lymphadenectomy.
Furthermore, dissection of the bladder neck is essential for preservation of continence. If the urethra is cut too short, there is a decit of sphinc­ter tissue, resulting in stress urinary incontinence. However, leaving a too long urethral segment might result in urinary retention. Therefore, the urethra should be dissected 5mm below the blad­der neck (Fig.14.4).
To assess incontinence, a medical history (preexisting incontinence increases the risk), physical examination, and sonography (differen­tial diagnosis is overow incontinence due to uri­nary retention) should be performed rst. In patients with an orthotopic neobladder, in whom the surgical principles of detubularization and reconguration to achieve a low-pressure reser­voir were not adhered to, urodynamic diagnostics can determine the increased pressures and thus the indication for revision surgery.
Fig. 14.4 Bladder neck dissection: A Foley catheter (virtually superimposed) helps identify the bladder neck (a). Dissection 5mm below the bladder neck (b) (with permission from John Wiley and Sons [6])
14 Complications in Orthotopic Neobladders
141
Conservative treatment options for inconti­nence are pelvic oor exercises with or without biofeedback and electric stimulation. However, the improvement depends on the patient’s compli­ance. Duloxetine, a serotonin and noradrenaline reuptake inhibitor, is currently the only pharma­ceutical treatment option for incontinence. There are only limited surgical options available for treating stress urinary incontinence in women who have undergone orthotopic neobladder replacement. While bulking agents may provide temporary relief, the use of tension-free vaginal tapes is associated with a high risk of perforation. In cases of refractory stress urinary incontinence, diversion into an ileal conduit or a catheterizable continent reservoir may be the last option.
Urinary Retention Various causes of post-void residual urine have been identied in patients with neobladders (Fig. 14.5). Ileal folds, anastomotic strictures, tumor recurrence, and prolapse can lead to outlet obstruction. The nerve-sparing approach and dissection of the urethra have already been described above. Preservation of urethral vascular­ization in bladder neck dissection is also manda­tory. To avoid kinking of the reservoir outlet, a separate buttonhole should be created at the most caudal point of the pouch for the ureteroileal anas­tomosis while creating the neobladder.
Cystoscopy is a main component in the diagnosis of bladder emptying disorders. Strictures and intestinal folds can be transurethrally resected. Urinary retention may cause recurrent UTIs and cystolithiasis and can damage the upper urinary tract with impairment of the renal function. Urinary retention often results in long-term inter­mittent aseptic catheterization. The rate of residual urine with an indication for intermittent aseptic catheterization is more common in female patients (0–53%) than in men (4–33%) [7] (Fig.14.6).
Ureteric Strictures Ureteral strictures usually occur distal to the implantation in the neobladder and were reported in 2.7–3.8% of cases [5]. To avoid ureteric strictures, it is essential to maintain the vascular and nerve supply of the ureters (Fig. 14.7). As already described above, suture insufciency at the ureteral implantation site increases the risk of strictures. In case of hydrone­phrosis, renal scintigraphy should be performed to differentiate between chronic ectasia without urodynamic problems and signicant hydrone­phrosis. If an obstructive outow is detected, a double J (DJ) stent or a nephrostomy tube (in patients with challenging retrograde instrumenta­tion) should be inserted, to protect the upper uri­nary tract from further damage. The only way to cure the stricture would be a surgical revision.
Fig. 14.5 Causes of urinary retention
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K. Meisterhofer et al.
abc
Fig. 14.6 An obstructive ileal fold (a). Transurethral resection of the fold (b). Postoperative result with a wide outlet of the neobladder (c)
Fig. 14.7 To avoid ureteric strictures (a), it is essential to maintain the vascular and nerve supply of the ureters (b) (specimen from K.Colleselli)
Sexual Dysfunctions Sexual dysfunctions include decreased desire, decreased lubrication of the vagina, decreased ability to achieve an orgasm, and dyspareunia. The disorders were reported at rates of 49%, 9.5%, 39%, and 25%, respectively, after cystectomy [8].
Devascularization of the surrounding neuro­vascular bundles of the vagina and clitoris and shortening of the vaginal length cause sexual dysfunction after cystectomy. Therefore, pres­ervation of autonomic nerve bers is not only important for continence but also for sexual
offered. The incidence of sexual dysfunction was reported in 10% of patients receiving sex­ual organ- or nerve- sparing cystectomy and in 59% receiving radical cystectomy [8]. In addi­tion, bilateral removal of the ovaries leads to impairment of sexual functions, especially in young patients. Accordingly, preservation of an ovary should be discussed preoperatively; the removal of the fallopian tube, including the mbrial funnel, is recommended with regard to the prevention of ovarian carcinoma (opportu-
nistic salpingectomy). function. The nerve-sparing approach has already been described above. Radical cystec­tomy includes resection of the uterus and part of the anterior wall of the vagina. A longitudi­nal re- tubularization of the vagina increases the depth of the vagina compared to a transversal closing but may result in a narrow lumen, caus­ing dyspareunia. In benign indications for cys­tectomy, a genital-preserving technique can be
Pelvic Organ Prolapse The incidence of vagi-
nal prolapse after cystectomy is 6–12% [9].
Patients may experience vaginal bulging, pelvic
pressure, difculty emptying the bowel or blad-
der, or sexual dysfunction. Management includes
conservative therapy such as vaginal pessaries or
surgery with transabdominal or transvaginal sus-
pension with or without mesh. However, there is
14 Complications in Orthotopic Neobladders
Fig. 14.8 Vaginal prolapse after cystectomy with neo­bladder replacement
no standardized recommendation for pelvic organ prolapse with an orthotopic neobladder. The combination of colpectomy and colpocleisis represents a last resort in older patients who do not wish to have sexual intercourse (Fig.14.8).
Urinary Tract Infections Patients with a neo­bladder do not have typical dysuric symptoms of an UTI.A common symptom is increased mucus pro­duction. Residual urine often leads to UTIs and stone formation, which, in turn, leads to recurrent UTIs. In case of urinary diversions, the infections are dened as complicated UTIs. Therefore, micro­biological examinations should be performed, and patients should be treated with antibiotic therapy in sufcient dosage and duration (usually 7days).
Metabolic Imbalance Reabsorption of urine through the intestinal mucosa of the neobladder may lead to metabolic imbalance. It depends on the length of the used intestinal segment, the length of time the urine remains in the neoblad­der, and the pH and osmolarity of the urine. Metabolic imbalance occurs mostly in the early time period after catheter removal. Due to atro­phy of the mucosa, reabsorption decreases over time. Nevertheless, some patients have metabolic problems even after years. Metabolic imbalance causes symptoms like lethargy, confusion, mus-
143
cular weakness, fatigue, nausea, vomiting, or
abdominal pain. Therefore, blood gas analysis
should be performed regularly.
Patients who have an ileal reservoir tend to develop hypochloremic acidosis, while those with colonic segments tend to develop hyperchloremic acidosis. Acidosis can be treated with sodium bicarbonate. In cases of hyperchloremic acidosis, patients may require potassium supplementation. Chronic metabolic acidosis may cause bone demineralization and therefore osteoporosis.
Malabsorption Reduced intestinal absorption
of vitamin D and calcium following ileal resec­tion may also affect bone metabolism in urinary diversions.
Vitamin B12 is absorbed in the terminal ileum. Extensive use of this small intestinal part can lead to decreased absorption. Deciency may lead to anemia or severe and irreversible neurological diseases (e.g., periph­eral polyneuropathy, dementia, spinal cord degeneration, optic atrophy). In people con­suming a balanced diet, vitamin B12 is stored in sufcient amounts in the liver. Hence, de­ciency may not become apparent for several years. Screening for vitamin B12 deciency is therefore recommended throughout life, and, if a deciency is conrmed, parenteral supple­mentation is extremely important.
Bile acids are reabsorbed in the terminal ileum. A shortened ileum can lead to chologenic diarrhea. In this case cholestyramine bind bile acids thereby relieving these symptoms.
Short Bowel Syndrome In addition to malab­sorption, the use of a long bowel segment for uro­logical reconstruction can result in faster bowel transit time. This can lead to increased stool fre­quency and diarrhea. Loperamide or opium tinc­ture can improve the amount and frequency of diarrhea (Fig.14.9).
Psychological Effects Surgery can also have psychological effects on patients, especially when they experience complications or have dif­culties in adjusting to their neobladder. Symptoms may include anxiety, depression, or
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blood gas analysis to detect anemia, increased renal function, vitamin deciency, and metabolic imbalance. If an UTI is suspected, a urine culture should be obtained. Ultrasound should be per­formed to exclude residual urine and hydrone­phrosis. CT scans or MRI should be performed according to the oncological follow-up plan in case of an underlying malignancy.

References

Fig. 14.9 The use of a long bowel segment for neoblad-
der reconstruction increases the risk of short bowel syn­drome. The I-Pouch neobladder requires only 40cm of the terminal ileum, whereas other techniques require up to 70cm of the intestine [10, 11]
feelings of isolation or frustration. Treatment options may include therapy or medication to manage symptoms as well as support from rela­tives or support groups.

Conclusions

In summary, to avoid all these early and long­term risks and complications, after cystectomy and orthotopic bladder replacement, patients benet from standardized perioperative manage­ment and need a close and lifelong follow-up.
The use of a fast-track program reduces mor­bidity and improves early recovery [12]. This concept includes, e.g., sufcient pain manage­ment, including epidural anesthesia, early mobi­lization, and early removal of the gastric tube for bowel recovery. The drainages and catheter should be removed after exclusion of leakage, as described above. In addition, a prophylaxis of thrombosis and pulmonary embolism is essential in the early postoperative time.
During follow-up, the anamnesis should cover drinking and voiding behavior as well as cathe­terization frequency if performed. In addition, sexual anamnesis and questions about quality of life should be included, to recognize psychologi­cal problems at an early stage.
Blood tests should focus on hemoglobin, cre­atinine, electrolytes, vitamin B12, and venous
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