Bladder CancerNCT03108196
Comparison of Safety and Efficacy of Detaenial Sigmoid Neobladder and Ileal Neobladder
A study testing sigmoid and ileal in people with Bladder Cancer and Urinary Diversion, run by Zhujiang Hospital at 1 site in China.
Trial summary
Bladder cancer is a common malignant tumor of the urinary system, radical resection plus urinary diversion is the first choice of treatment for muscle invasive bladder cancer. Urinary diversion of surgical options related to patient' survival and quality of life. Read more about this study
- Who is it for?
- Ages 18 to 100 years
- Conditions the study is for
- Bladder Cancer, Urinary Diversion
- What is being tested?
- sigmoid and ileal
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 96 participants
- Where
- 1 siteChina
- Study dates
- 2 May 2018to 30 Sep 2028
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 100 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Bladder carcinoma in situ, include CIS and T1G3 tumor, muscle invasive bladder cancer（T2/T3N0-1M0）
- Recurrent bladder cancer
- Other conditions that have been approved by a urologist for indications for new bladder surgery
- Had been received intravesical chemotherapy, intra-arterial infusion chemotherapy or systemic chemotherapy in the past.
- Voluntarily signed the informed consent -
Who cannot join
- Preoperative serum creatinine more than 2.26mg/dl（Or 200μmol/L）
- Cancer invaded urethral (confirmed by the pathology)
- Non - bladder cancer patients underwent neobladder
- A history of other malignant tumors within five years
- Ileum / sigmoid chronic inflammation, like ulcerative colitis or intestinal tuberculosis, and so on.
- Other conditions that have been approved by a urologist for not suitable for new bladder surgery
- -
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site, 1 recruiting
- Recruiting
Zhujiang Hospital
Guangzhou, Guangdong, 510282
Chunxiao Liu, Doctor, +86 13302296795, liuchx888@163.com
Abai Xu, Doctor, +86 18665626790, lc96xab@163.com
About this study
Official title: A Multicenter Randomized Controlled Study to Compare the Safety and Efficacy of Detaenial Sigmoid Neobladder and Hautmann Ileal Neobladder in Patients With Bladder Cancer
Bladder cancer is a common malignant tumor of the urinary system, radical resection plus urinary diversion is the first choice of treatment for muscle invasive bladder cancer. Urinary diversion of surgical options related to patient' survival and quality of life.
In 1988, Hautmann firstly reported an orthotopic urinary diversion method: Hautmann neobladder. As the urine can be controlled from the original urethra, the patient's quality of life has been greatly improved, so the new bladder surgery gradually accepted and welcomed by urologists and patients. However, in order to achieve low-pressure and large-volume storage capacity of the urine reservoir, the 40-70cm long interception of terminal ileum need to be detubularized. Only after split, folded, re-stitched and a series of treatment, the intestinal can be used. Such complicated procedures make so many urologists give it up. In addition, the interception of the long ileum may lead to reduced absorption of vitamin B12 which caused anemia, metabolic acidosis, intestinal dysfunction. Not only that, as time goes by, this kind of neobladder will be unlimited expansion and resulting in a serious increase in residual urine volume, hydronephrosis, or even the occurrence of neobladder spontaneous rupture.
Read more
In 2000, professor Chunxiao Liu invented "detaenial sigmoid neobladder", this surgical method overset the traditional intestinal detubularization approach, which detached the serosal layer with smooth muscle from the bowel without split it. This kind of neobladder is easier to construct and have less impact on intestinal function. So far, it has been implemented for more than 600 cases in Zhujiang hospital, the age of patients range from 9 months (bladder rhabdomyosarcoma) to 84 years old.
So far as now, no multicenter prospective clinical study on orthotopic urinary diversion has been performed worldwide, neither the head-to-head studies on detaenial sigmoid neobladder and ileal neobladder.
Our project is going to perform a multicenter randomized controlled trial for these two neobladder methods and look forward to assess the safety and efficacy of these two procedures which provide an objective basis for the patients undergoing orthotopic urinary diversion in the future.
Read the detailed description
Surgical technique for Hautmann ileal neobladder: A 70-cm portion of terminal ileum is selected and incised on the antimesenteric border. The ileum is arranged into an M or W configuration with the four limbs sutured to one another. After a buttonhole of ileum is removed on an antimesenteric portion of the ileum, the urethral anastomosis is performed. The ureteral anastomoses are performed using a Le Duc technique or direct implantation, are stented, and the reservoir is then closed in a side-to-side manner. As an alternative, the two ends of the W may be left slightly longer as a short chimney on either side for implantation of the ureters.
Surgical technique for detaenial sigmoid neobladder: After radical cystectomy, the sigmoid was brought out from a midline incision in the lower abdomen and a 15 to 25 cm segment was isolated. Intestinal continuity was restored using a circular stapler. Omental and free taeniae, and the serosal layer were incised deeply as far as the submucosal layer until the plane between smooth muscle and the submucosal layer could be identified clearly by scalpel dissection. The serosal layer with smooth muscle was then detached from the submucosal layer and removed continuously without difficulty. During this time, the operator could insert the finger in the sigmoid lumen and lift the sigmoid wall up for accurate dissection. Only the mucosal and submucosal layers were preserved. Approximately 2 to 3 cm of the taeniae and serosal layer were preserved to strengthen the urethra-neobladder anastomosis at the central portion of the isolated sigmoid and at the two ends for the ureter-neobladder anastomosis. The detaenial sigmoid was irrigated repeatedly by dilute iodine solution to eliminate impurities. Its capacity for enlargement and leak tightness were assessed at the end by filling with 300 to 400 ml iodine solution. Residual taeniae were identified and incised during this filling phase. The ureters were subsequently implanted in antirefluxing fashion in a submucosal tunnel with 4-zero poly glactin at the two ends of sigmoid. The ureter-neobladder anastomoses were protected with a 6Fr Single J® stent. Each stent was passed through the sigmoid wall and exteriorized. The two ends of the sigmoid were closed by 2-zero polyglactin with the embedded seromuscular layer. The central portion of the sigmoid was incised and a 22Fr 3-way catheter was inserted in neobladder. The neobladder was anastomosed to the urethra with 2-zero polyglactin.
Followup: Each patient was evaluated at 3-month intervals for 1 year, at 6-month intervals for 2 to 5 years. Renal ultrasound, biochemical examination and urine culture were done every 3 to 6 months. Pelvic computerized tomography and retro-cystogram were performed 6 months postoperatively and annually thereafter. Urodynamic investigation and cystoscopic examination were done annually.
Postoperative complications were classified as early (90 days or less) and late (greater than 90 days). Early and late complications were subdivided into those related and not related to the neobladder. Complication grade was classified according to the Clavien-Dindo system. Major complications were defined as grade III or higher. Daytime and nighttime continence levels were recorded postoperatively at patient interview. Continence was defined as complete if the patient was dry without a pad, satisfactory if no more than 1 pad was required and poor if the patient used more than 1 pad during the day or night.
End points: The primary end point was change in renal function from baseline to 3 years. Secondary end points included changes in renal function from baseline to 6, 12 and 24 months, reduction in eGFR 10 ml/minute/1.73 m2 or greater, early (less than 90 days) and late (90 days to 3 years) complications, urinary tract infection that was symptomatic or was treated, any surgical re-intervention or urinary diversion related surgical re-intervention defined as an open or endoscopic procedure under anesthesia, cancer recurrence and overall survival. Renal function was assessed using the CKD-EPI equation. Complications were analyzed and graded by a blinded adjudicator using the modified Clavien complication grading system.
- Conditions
- Bladder Cancer, Urinary Diversion
- Being tested
- sigmoid, ileal
- Keywords
- bladder cancer， neobladder, detaenial sigmoid, ileal
- Medical subject headings
- Urinary Bladder Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
sigmoidProcedure or surgery
The serosal layer with smooth muscle was detached from a 15 cm sigmoid segment submucosal layer and removed continuously. Only the mucosal and submucosal layers were preserved. Approximately 2 cm of the taeniae and serosal layer were preserved to strengthen the urethra-neobladder anastomosis at the central portion of the isolated sigmoid and at the two ends for the ureter-neobladder anastomosis. The ureters were subsequently implanted in antirefluxing fashion in a submucosal tunnel. The ureter-neobladder anastomoses were protected with a 6Fr Single J® stent. The two ends of the sigmoid were closed with the embedded seromuscular layer. The neobladder was anastomosed to the urethra after that.
ilealProcedure or surgery
The isolated 70 cm terminal ileum segment is arranged in either an M or W shape and is opened along the antimesenteric border except for a 5 cm section where the incision is curved to make a U-shaped flap. The four limbs of the M or W are then sutured to one another with a running absorbable suture. A small full-thickness segment of bowel is excised for the urethral anastomosis. Once the ileal neobladder is situated and the urethral sutures are tied, the ureters are implanted from inside the neobladder through a small incision in the ileum. The remaining portion of the anterior wall is then closed with a running absorbable suture. Ureteroileal anastomosis were performed with a freely refluxing, open end-to-side method at each end of the W.
| Study group | Role | What they receive |
|---|---|---|
| sigmoid | Experimental | Use 15 cm detaenial sigmoid colon to reconstructed a "U" shape neobladder after radical cystectomy. Receives: Procedure: sigmoid |
| ileal | Experimental | Use 70 cm distal ileal segment to reconstructed a "spherical" shape neobladder after radical cystectomy. Receives: Procedure: ileal |
What is being measured
The primary outcome is the main question the study is designed to answer.
Post void residual volume of neobladder
Residual urine volume after spontaneous urination with urinary diversion in the 36th month
Measured: the 36th month
Secondary outcomes (3)
Time cost
Time consuming of neobladder construction
Measured: 24 hour
EBL
Estimated blood loss
Measured: 24 hour
Short term complications
Complications which happened during 90 day postoperative
Measured: 90 day postoperative
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Apr 2017
- Study start2 May 2018
- Primary completion30 Aug 2027 (estimated)
- Study completion30 Sep 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Bladder CancerStudies of the same condition, open and under way.
- More trials run by Zhujiang HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Superiority verification based on the ileal neobladder
- Masking
- None (open label)
- Enrolment
- 96 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Zhujiang Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Sun Yat-Sen University Cancer Center, The Third Affiliated Hospital of Southern Medical University, Fourth Affiliated Hospital of Guangxi Medical University, Ludwig-Maximilians - University of Munich
- Responsible party
- Principal investigator, Abai Xu, Zhujiang Hospital
- Investigators
- Abai Xu, doctor, Principal investigator, Zhujiang Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03108196
- Sponsor's protocol ID
- LC2016PY030
- Status last verified
- Oct 2026
- First submitted
- 5 Apr 2017
- Last updated
- 9 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: All released data will be available for other researchers.
Publications
Zerhau P, Husar M. [Mucus production consequences in cystoplasties and continent urinary diversions in children--long term experiences]. Rozhl Chir. 2006 Mar;85(3):148-50. Czech.
PubMed 16689148Haupt G, Pannek J, Knopf HJ, Schulze H, Senge T. Rupture of ileal neobladder due to urethral obstruction by mucous plug. J Urol. 1990 Sep;144(3):740-1. doi: 10.1016/s0022-5347(17)39571-x.
PubMed 2388342Skinner EC, Fairey AS, Groshen S, Daneshmand S, Cai J, Miranda G, Skinner DG. Randomized Trial of Studer Pouch versus T-Pouch Orthotopic Ileal Neobladder in Patients with Bladder Cancer. J Urol. 2015 Aug;194(2):433-9. doi: 10.1016/j.juro.2015.03.101. Epub 2015 Mar 28.
PubMed 25823791Bacchetti P, Leung JM. Sample size calculations in clinical research. Anesthesiology. 2002 Oct;97(4):1028-9; author reply 1029-32. doi: 10.1097/00000542-200210000-00050. No abstract available.
PubMed 12357184Julious SA. Sample sizes for clinical trials with normal data. Stat Med. 2004 Jun 30;23(12):1921-86. doi: 10.1002/sim.1783.
PubMed 15195324Miyake H, Furukawa J, Sakai I, Muramaki M, Yamashita M, Inoue TA, Fujisawa M. Orthotopic sigmoid vs. ileal neobladders in Japanese patients: a comparative assessment of complications, functional outcomes, and quality of life. Urol Oncol. 2013 Oct;31(7):1155-60. doi: 10.1016/j.urolonc.2011.11.015. Epub 2011 Dec 6.
PubMed 22153716Clavien PA, Barkun J, de Oliveira ML, Vauthey JN, Dindo D, Schulick RD, de Santibanes E, Pekolj J, Slankamenac K, Bassi C, Graf R, Vonlanthen R, Padbury R, Cameron JL, Makuuchi M. The Clavien-Dindo classification of surgical complications: five-year experience. Ann Surg. 2009 Aug;250(2):187-96. doi: 10.1097/SLA.0b013e3181b13ca2.
PubMed 19638912Siegel RL, Miller KD, Jemal A. Cancer statistics, 2016. CA Cancer J Clin. 2016 Jan-Feb;66(1):7-30. doi: 10.3322/caac.21332. Epub 2016 Jan 7.
PubMed 26742998Witjes JA, Comperat E, Cowan NC, De Santis M, Gakis G, Lebret T, Ribal MJ, Van der Heijden AG, Sherif A; European Association of Urology. EAU guidelines on muscle-invasive and metastatic bladder cancer: summary of the 2013 guidelines. Eur Urol. 2014 Apr;65(4):778-92. doi: 10.1016/j.eururo.2013.11.046. Epub 2013 Dec 12.
PubMed 24373477Hautmann RE, Egghart G, Frohneberg D, Miller K. The ileal neobladder. J Urol. 1988 Jan;139(1):39-42. doi: 10.1016/s0022-5347(17)42283-x.
PubMed 3336101Xu K, Liu CX, Zheng SB, Li HL, Xu YW, Xu AB, Chen BS, Shen HY. Orthotopic detaenial sigmoid neobladder after radical cystectomy: technical considerations, complications and functional outcomes. J Urol. 2013 Sep;190(3):928-34. doi: 10.1016/j.juro.2013.03.072. Epub 2013 Mar 26.
PubMed 23538237Xu A, Li B, Li H, Zheng S, Du W, Xu Y, Zou Y, Luo Q, Liu C. Comparison of seromuscular tunnel and split-cuff nipple antireflux ureteroenteral anastomosis techniques in orthotopic taenia myectomy sigmoid neobladder: a prospective, randomized study. Urology. 2013 Mar;81(3):669-74. doi: 10.1016/j.urology.2012.11.018. Epub 2013 Jan 3.
PubMed 23290142
Study at a glance
From the registry record, last updated by the sponsor on 9 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Multicenter Randomized Controlled Study to Compare the Safety and Efficacy of Detaenial Sigmoid Neobladder and Hautmann Ileal Neobladder in Patients With Bladder Cancer
- ClinicalTrials.gov ID
- NCT03108196
- Acronym / sponsor ID
- LC2016PY030
- Conditions
- Bladder Cancer, Urinary Diversion
- Keywords
- bladder cancer， neobladder, detaenial sigmoid, ileal
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 96 participants (estimated)
- Lead sponsor
- Zhujiang HospitalUniversity, hospital or other
- Collaborators
- Sun Yat-Sen University Cancer Center, The Third Affiliated Hospital of Southern Medical University, Fourth Affiliated Hospital of Guangxi Medical University, Ludwig-Maximilians - University of Munich
- Study start
- 2 May 2018 (actual)
- Primary completion
- 30 Aug 2027 (estimated)
- Study completion
- 30 Sep 2028 (estimated)
- First posted
- 11 Apr 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Bladder cancer is a common malignant tumor of the urinary system, radical resection plus urinary diversion is the first choice of treatment for muscle invasive bladder cancer. Urinary diversion of surgical options related to patient' survival and quality of life.
In 1988, Hautmann firstly reported an orthotopic urinary diversion method: Hautmann neobladder. As the urine can be controlled from the original urethra, the patient's quality of life has been greatly improved, so the new bladder surgery gradually accepted and welcomed by urologists and patients. However, in order to achieve low-pressure and large-volume storage capacity of the urine reservoir, the 40-70cm long interception of terminal ileum need to be detubularized. Only after split, folded, re-stitched and a series of treatment, the intestinal can be used. Such complicated procedures make so many urologists give it up. In addition, the interception of the long ileum may lead to reduced absorption of vitamin B12 which caused anemia, metabolic acidosis, intestinal dysfunction. Not only that, as time goes by, this kind of neobladder will be unlimited expansion and resulting in a serious increase in residual urine volume, hydronephrosis, or even the occurrence of neobladder spontaneous rupture.
In 2000, professor Chunxiao Liu invented "detaenial sigmoid neobladder", this surgical method overset the traditional intestinal detubularization approach, which detached the serosal layer with smooth muscle from the bowel without split it. This kind of neobladder is easier to construct and have less impact on intestinal function. So far, it has been implemented for more than 600 cases in Zhujiang hospital, the age of patients range from 9 months (bladder rhabdomyosarcoma) to 84 years old.
So far as now, no multicenter prospective clinical study on orthotopic urinary diversion has been performed worldwide, neither the head-to-head studies on detaenial sigmoid neobladder and ileal neobladder.
Our project is going to perform a multicenter randomized controlled trial for these two neobladder methods and look forward to assess the safety and efficacy of these two procedures which provide an objective basis for the patients undergoing orthotopic urinary diversion in the future.
Detailed description
Surgical technique for Hautmann ileal neobladder: A 70-cm portion of terminal ileum is selected and incised on the antimesenteric border. The ileum is arranged into an M or W configuration with the four limbs sutured to one another. After a buttonhole of ileum is removed on an antimesenteric portion of the ileum, the urethral anastomosis is performed. The ureteral anastomoses are performed using a Le Duc technique or direct implantation, are stented, and the reservoir is then closed in a side-to-side manner. As an alternative, the two ends of the W may be left slightly longer as a short chimney on either side for implantation of the ureters.
Surgical technique for detaenial sigmoid neobladder: After radical cystectomy, the sigmoid was brought out from a midline incision in the lower abdomen and a 15 to 25 cm segment was isolated. Intestinal continuity was restored using a circular stapler. Omental and free taeniae, and the serosal layer were incised deeply as far as the submucosal layer until the plane between smooth muscle and the submucosal layer could be identified clearly by scalpel dissection. The serosal layer with smooth muscle was then detached from the submucosal layer and removed continuously without difficulty. During this time, the operator could insert the finger in the sigmoid lumen and lift the sigmoid wall up for accurate dissection. Only the mucosal and submucosal layers were preserved. Approximately 2 to 3 cm of the taeniae and serosal layer were preserved to strengthen the urethra-neobladder anastomosis at the central portion of the isolated sigmoid and at the two ends for the ureter-neobladder anastomosis. The detaenial sigmoid was irrigated repeatedly by dilute iodine solution to eliminate impurities. Its capacity for enlargement and leak tightness were assessed at the end by filling with 300 to 400 ml iodine solution. Residual taeniae were identified and incised during this filling phase. The ureters were subsequently implanted in antirefluxing fashion in a submucosal tunnel with 4-zero poly glactin at the two ends of sigmoid. The ureter-neobladder anastomoses were protected with a 6Fr Single J® stent. Each stent was passed through the sigmoid wall and exteriorized. The two ends of the sigmoid were closed by 2-zero polyglactin with the embedded seromuscular layer. The central portion of the sigmoid was incised and a 22Fr 3-way catheter was inserted in neobladder. The neobladder was anastomosed to the urethra with 2-zero polyglactin.
Followup: Each patient was evaluated at 3-month intervals for 1 year, at 6-month intervals for 2 to 5 years. Renal ultrasound, biochemical examination and urine culture were done every 3 to 6 months. Pelvic computerized tomography and retro-cystogram were performed 6 months postoperatively and annually thereafter. Urodynamic investigation and cystoscopic examination were done annually.
Postoperative complications were classified as early (90 days or less) and late (greater than 90 days). Early and late complications were subdivided into those related and not related to the neobladder. Complication grade was classified according to the Clavien-Dindo system. Major complications were defined as grade III or higher. Daytime and nighttime continence levels were recorded postoperatively at patient interview. Continence was defined as complete if the patient was dry without a pad, satisfactory if no more than 1 pad was required and poor if the patient used more than 1 pad during the day or night.
End points: The primary end point was change in renal function from baseline to 3 years. Secondary end points included changes in renal function from baseline to 6, 12 and 24 months, reduction in eGFR 10 ml/minute/1.73 m2 or greater, early (less than 90 days) and late (90 days to 3 years) complications, urinary tract infection that was symptomatic or was treated, any surgical re-intervention or urinary diversion related surgical re-intervention defined as an open or endoscopic procedure under anesthesia, cancer recurrence and overall survival. Renal function was assessed using the CKD-EPI equation. Complications were analyzed and graded by a blinded adjudicator using the modified Clavien complication grading system.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Superiority verification based on the ileal neobladder
| Arm | Type | Receives |
|---|---|---|
| sigmoid | Experimental | Procedure: sigmoidUse 15 cm detaenial sigmoid colon to reconstructed a "U" shape neobladder after radical cystectomy. |
| ileal | Experimental | Procedure: ilealUse 70 cm distal ileal segment to reconstructed a "spherical" shape neobladder after radical cystectomy. |
Who may qualify
- Ages
- 18 to 100 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Bladder carcinoma in situ, include CIS and T1G3 tumor, muscle invasive bladder cancer（T2/T3N0-1M0）
- Recurrent bladder cancer
- Other conditions that have been approved by a urologist for indications for new bladder surgery
- Had been received intravesical chemotherapy, intra-arterial infusion chemotherapy or systemic chemotherapy in the past.
- Voluntarily signed the informed consent -
Key exclusion criteria (7 listed)
- Preoperative serum creatinine more than 2.26mg/dl（Or 200μmol/L）
- Cancer invaded urethral (confirmed by the pathology)
- Non - bladder cancer patients underwent neobladder
- A history of other malignant tumors within five years
- Ileum / sigmoid chronic inflammation, like ulcerative colitis or intestinal tuberculosis, and so on.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| sigmoidThe serosal layer with smooth muscle was detached from a 15 cm sigmoid segment submucosal layer and removed continuously. Only the mucosal and submucosal layers were preserved. Approximately 2 cm of the taeniae and serosal layer were preserved to strengthen the urethra-neobladder anastomosis at the central portion of the isolated sigmoid and at the two ends for the ureter-neobladder anastomosis. The ureters were subsequently implanted in antirefluxing fashion in a submucosal tunnel. The ureter-neobladder anastomoses were protected with a 6Fr Single J® stent. The two ends of the sigmoid were closed with the embedded seromuscular layer. The neobladder was anastomosed to the urethra after that. | Procedure or surgery | sigmoid |
| ilealThe isolated 70 cm terminal ileum segment is arranged in either an M or W shape and is opened along the antimesenteric border except for a 5 cm section where the incision is curved to make a U-shaped flap. The four limbs of the M or W are then sutured to one another with a running absorbable suture. A small full-thickness segment of bowel is excised for the urethral anastomosis. Once the ileal neobladder is situated and the urethral sutures are tied, the ureters are implanted from inside the neobladder through a small incision in the ileum. The remaining portion of the anterior wall is then closed with a running absorbable suture. Ureteroileal anastomosis were performed with a freely refluxing, open end-to-side method at each end of the W. | Procedure or surgery | ileal |
Primary outcome
Post void residual volume of neobladder
Time frame: the 36th month
Residual urine volume after spontaneous urination with urinary diversion in the 36th month
3 secondary outcomes
Time cost
Time frame: 24 hour
EBL
Time frame: 24 hour
Short term complications
Time frame: 90 day postoperative
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Oct 2026.
- Background: PubMed 16689148Zerhau P, Husar M. [Mucus production consequences in cystoplasties and continent urinary diversions in children--long term experiences]. Rozhl Chir. 2006 Mar;85(3):148-50. Czech.
- Background: PubMed 2388342Haupt G, Pannek J, Knopf HJ, Schulze H, Senge T. Rupture of ileal neobladder due to urethral obstruction by mucous plug. J Urol. 1990 Sep;144(3):740-1. doi: 10.1016/s0022-5347(17)39571-x.
- Background: PubMed 25823791Skinner EC, Fairey AS, Groshen S, Daneshmand S, Cai J, Miranda G, Skinner DG. Randomized Trial of Studer Pouch versus T-Pouch Orthotopic Ileal Neobladder in Patients with Bladder Cancer. J Urol. 2015 Aug;194(2):433-9. doi: 10.1016/j.juro.2015.03.101. Epub 2015 Mar 28.
- Background: PubMed 12357184Bacchetti P, Leung JM. Sample size calculations in clinical research. Anesthesiology. 2002 Oct;97(4):1028-9; author reply 1029-32. doi: 10.1097/00000542-200210000-00050. No abstract available.
- Background: PubMed 15195324Julious SA. Sample sizes for clinical trials with normal data. Stat Med. 2004 Jun 30;23(12):1921-86. doi: 10.1002/sim.1783.
- Background: PubMed 22153716Miyake H, Furukawa J, Sakai I, Muramaki M, Yamashita M, Inoue TA, Fujisawa M. Orthotopic sigmoid vs. ileal neobladders in Japanese patients: a comparative assessment of complications, functional outcomes, and quality of life. Urol Oncol. 2013 Oct;31(7):1155-60. doi: 10.1016/j.urolonc.2011.11.015. Epub 2011 Dec 6.
- Background: PubMed 19638912Clavien PA, Barkun J, de Oliveira ML, Vauthey JN, Dindo D, Schulick RD, de Santibanes E, Pekolj J, Slankamenac K, Bassi C, Graf R, Vonlanthen R, Padbury R, Cameron JL, Makuuchi M. The Clavien-Dindo classification of surgical complications: five-year experience. Ann Surg. 2009 Aug;250(2):187-96. doi: 10.1097/SLA.0b013e3181b13ca2.
- Results publication: PubMed 26742998Siegel RL, Miller KD, Jemal A. Cancer statistics, 2016. CA Cancer J Clin. 2016 Jan-Feb;66(1):7-30. doi: 10.3322/caac.21332. Epub 2016 Jan 7.
- Results publication: PubMed 24373477Witjes JA, Comperat E, Cowan NC, De Santis M, Gakis G, Lebret T, Ribal MJ, Van der Heijden AG, Sherif A; European Association of Urology. EAU guidelines on muscle-invasive and metastatic bladder cancer: summary of the 2013 guidelines. Eur Urol. 2014 Apr;65(4):778-92. doi: 10.1016/j.eururo.2013.11.046. Epub 2013 Dec 12.
- Results publication: PubMed 3336101Hautmann RE, Egghart G, Frohneberg D, Miller K. The ileal neobladder. J Urol. 1988 Jan;139(1):39-42. doi: 10.1016/s0022-5347(17)42283-x.
- Results publication: PubMed 23538237Xu K, Liu CX, Zheng SB, Li HL, Xu YW, Xu AB, Chen BS, Shen HY. Orthotopic detaenial sigmoid neobladder after radical cystectomy: technical considerations, complications and functional outcomes. J Urol. 2013 Sep;190(3):928-34. doi: 10.1016/j.juro.2013.03.072. Epub 2013 Mar 26.
- Results publication: PubMed 23290142Xu A, Li B, Li H, Zheng S, Du W, Xu Y, Zou Y, Luo Q, Liu C. Comparison of seromuscular tunnel and split-cuff nipple antireflux ureteroenteral anastomosis techniques in orthotopic taenia myectomy sigmoid neobladder: a prospective, randomized study. Urology. 2013 Mar;81(3):669-74. doi: 10.1016/j.urology.2012.11.018. Epub 2013 Jan 3.
- Individual participant dataSharing planned: No. All released data will be available for other researchers.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Abai Xu, doctor principal investigator
Zhujiang Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing sigmoid and ileal in people with Bladder Cancer and Urinary Diversion, run by Zhujiang Hospital at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 9 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Abai Xu, doctor (+86 18665626790, lc96xab@163.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Post void residual volume of neobladder (time frame: the 36th month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03108196, which also lists 12 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Oct 2026.