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Gracilis muscle flap with a tissue-engineered lining for experimental bladder wall reconstruction
T Schoeller1, S Lille, T Bauer
1Department of Plastic and Reconstructive Surgery, University Hospital Innsbruck, Leopold-Franzens University, the Ludwig Boltzmann Institute for Quality Control in Plastic Surgery, Innsbruck, Austria. thomas.schoeller@uibk.ac.at
BJU International
|July 12, 2001
Summary
This study shows that a gracilis muscle flap pre-laminated with urothelial cells can successfully reconstruct bladder wall defects in rats. This technique provides a stable, functioning urothelial lining for urinary reconstruction.
Area of Science:
- Regenerative Medicine
- Urology
- Tissue Engineering
Background:
- Bladder wall defects pose significant reconstructive challenges.
- Current methods may lack durability and a functional urothelial lining.
Purpose of the Study:
- To evaluate a novel bladder reconstruction technique using a pedicled gracilis muscle flap pre-laminated with autologous urothelial cells.
- To assess the integration and functionality of the reconstructed bladder wall in a rat model.
Main Methods:
- Harvested gracilis muscle flaps from rats and pre-laminated them with ex vivo-expanded autologous urothelial cells in fibrin glue.
- Transposed the pre-laminated flaps into surgically created supratrigonal bladder-wall defects.
- Compared outcomes with control groups receiving flaps with fibrin glue only or culture medium.
Main Results:
- The pre-laminated gracilis flap group demonstrated a continuous, multilayered, functioning urothelial lining.
- Animals with intact urothelial lining survived, unlike most in control groups.
- The flap showed potential for contraction and integration with the native bladder wall.
Conclusions:
- A gracilis muscle flap pre-laminated with autologous urothelial cells is a viable option for bladder wall reconstruction.
- This technique provides a stable urothelial lining and a contractile neo-reservoir.
- Further studies in larger animals are needed to assess urodynamic suitability for human application.