Biological Mesh Closure of the Pelvic Floor After Extralevator Abdomino Perineal Resection for Rectal Cancer

Rectal Cancer Clinical Trial

— BIOPEX  

Official title:

Long-term Results of Biological Mesh Closure of the Pelvic Floor After Extralevator Abdominoperineal Resection for Rectal Cancer

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01927497
• Other study ID #: METC 2012_360
• Secondary ID: NTR3717
• Status: Completed
• Phase: Phase 3
• Start date: March 8, 2013
• Est. completion date: September 1, 2015

Study information

• Verified date: July 2021
• Source: Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Rationale: Approximately 800 abdominoperineal resections (APR) are performed for rectal cancer each year in the Netherlands. The extralevator approach (eAPR) reduces the rate of positive margins and improves oncological outcome in distal rectal cancer. However, wider excisions increase wound healing problems and development of perineal hernia. This has resulted in a progressive increase of the use of musculocutaneous flaps and biological meshes associated with a substantial increase of costs, which is not supported by proper data.

Objective: The aim of this study is to determine the cost-effectiveness of pelvic floor reconstruction using a biological mesh after standardized eAPR with neo-adjuvant (chemo)radiotherapy.

Study design: This is a multicenter study in which patients undergoing an eAPR are randomized between standard care using primary closure of the perineum and the experimental arm with assisted closure using a biological mesh.

Study population: Patients with a clinical diagnosis of primary rectal cancer who are scheduled for eAPR after neo-adjuvant (chemo)radiotherapy. A total number of 104 patients will be randomized.

Intervention: The intervention in the experimental arm consists of suturing a biological mesh derived from porcine dermis in the pelvic floor defect, followed by perineal closure similar to the control arm.

Main study parameters/endpoints: The primary endpoint is the percentage of uncomplicated perineal wound healing (Souphampton wound score less than II at day 30). Secondary endpoints are hospital stay, incidence of perineal hernia, quality of life, and costs.

Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Both primary perineal closure and biological mesh assisted closure are being performed in daily clinical practise. The potential benefit resulting from participation of the study in patients randomized for biological mesh assisted closure may be a higher chance of uncomplicated perineal wound healing and lower perineal hernia rate. On the other hand, the use of a biological mesh has been associated with increased postoperative pain and seroma formation.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 104
• Est. completion date: September 1, 2015
• Est. primary completion date: September 1, 2014
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Age of 18 years or higher.

2. Planned for eAPR for primary rectal cancer.

3. Life expectancy of more than 2 years.

4. Ability to return for all scheduled and required study visits.

5. Preoperative (chemo)radiotherapy.

6. Written informed consent for study participation.

Exclusion Criteria:

1. Previous pelvic irradiation for other cancers (i.e. prostate cancer).

2. Total exenteration or sacral resection above level S4/S5.

3. Sensitivity to porcine derived products or polysorbate.

4. Severe systemic diseases affecting wound healing (i.e. renal failure requiring dialysis, liver cirrhosis, and immune compromised status like HIV).

5. Collagen disorders (i.e. Marfan).

6. Enrolment in trials with overlapping primary endpoint or otherwise expected influence on wound healing (i.e. biological therapy like antiangiogenic agents).

Related Conditions & MeSH terms

• Rectal Cancer
• Rectal Neoplasms

Intervention

Procedure:
• Biological mesh assisted perineal closure
The eAPR procedure will be performed in an identical way as described for the control arm of the study, and this is preferably followed by an omental plasty. The intervention in the experimental arm consists of suturing an acellular biological mesh derived from porcine dermis in the pelvic floor defect (Strattice™, 6x10 cm). The mesh will be sutured at each side of the coccyx or distal sacrum with Prolene or PDS to the discretion of the surgeon. Laterally, the mesh is attached to the remainings of the levator complex and, anteriorly, to the transverse perineal muscle or posterior vaginal wall. A suction drain will be inserted and positioned on top of the mesh. The perineal subcutaneous fat and skin will be subsequently closed in layers similar to primary simple closure as performed in the standard arm.
• Primary perineal closure
The perineal phase of the APR will be performed according to the principles of an extralevator APR, which means that the levator muscles will be laterally transected in order to leave a muscular cuff around the tumour. The coccyx will not be routinely resected, but only if indicated based on surgical exposure or oncological principles. The extent of excision of perineal skin and ischioanal fat will be as limited as oncologically justified. Preferably, an omental plasty is positioned in the pelvic cavity following resection. Closure of the perineum in the control arm consists of stitching the perineal subcutaneous fat together using interrupted Vicryl sutures in one or two layers. Subsequently, the skin will be closed using interrupted sutures according to the preference of the surgeon. Placement of a transabdominal or transperineal drain will be at the discretion of the surgeon.

Locations

Country	Name	City	State
Netherlands	Academic Medical Cener	Amsterdam	Noord-holland

Sponsors (2)

Lead Sponsor	Collaborator
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)	LifeCell

Country where clinical trial is conducted

Netherlands, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	30-day Uncomplicated Perineal Wound Healing	uncomplicated perineal wound healing is defined as a Souphampton wound score less than II	From operation to 30 days after the operation