title: Parastomal hernia prevention using a novel collagen implant: a randomised controlled phase 1 study.
abstract: BACKGROUND
  Parastomal hernias can be prevented or repaired using synthetic mesh; however, reported complications include infection, fibrosis and potential bowel erosion. The study aim was to assess the safety, feasibility and potential efficacy of using a prophylactic collagen implant.
  
  
  METHODS
  Twenty patients undergoing defunctioning stomas were randomised to a conventional procedure or reinforcement with the implant. Follow-up included regular symptom questionnaires, clinical examination, stoma site ultrasound, and serum inflammatory markers.
  
  
  RESULTS
  Ten patients (four males; mean BMI 26.3) had a conventional stoma, and ten (three males; mean BMI 26.3) received the implant. At a median of 6.5 months follow-up, a parastomal hernia was clinically evident in three of ten patients without the implant, and in none of ten patients with the implant. There were no clinical complications, ultrasound evidence of chronic seromas or serological evidence of a systemic inflammatory response.
  
  
  CONCLUSIONS
  Xenogeneic collagen has been demonstrated to aid soft tissue reinforcement. In this study, in contrast to published data relating to the use of conventional synthetic mesh, there were no complications related to infection or the implant's proximity to the bowel. This trial demonstrates that the implant is safe, feasible to use and has the potential to prevent parastomal herniation.
authors.affiliation: Centre for Academic Surgery, Institute of Cellular and Molecular Science, The Royal London Hospital, Barts and The London NHS Trust, Queen Mary School of Medicine and Dentistry, University of London, London, UK. t.hammond@qmul.ac.uk
authors.forename: T M
authors.initials: TM
authors.lastname: Hammond
authors.forename: A
authors.initials: A
authors.lastname: Huang
authors.forename: K
authors.initials: K
authors.lastname: Prosser
authors.forename: J N
authors.initials: JN
authors.lastname: Frye
authors.forename: N S
authors.initials: NS
authors.lastname: Williams
mesh_terms: D000328:Adult; D000368:Aged; D000714:Anastomosis, Surgical; D001672:Biocompatible Materials; D003094:Collagen; D005240:Feasibility Studies; D005260:Female; D006555:Hernia, Ventral / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D010030:Ostomy / Q000009:adverse effects; D019736:Prostheses and Implants; D054047:Surgical Stomas / Q000009:adverse effects*; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D003094:Collagen