Lab-grown bladders

Tailoring lab-grown organs for particular patients is almost reality: (BBC NEWS | Health | Lab-grown bladders 'a milestone'). No stem cells involved so there is no fear of political issues. Bladders are simpler than most other organs though. My question is: could an organ be grown in patient's body? Imaging if the doctors can put in a scaffold with an embedded chip-level device to seed the cells. The device can control the seeding process remotely. If possible, the device can be used to monitor the growth of tissue. When time is ready, just have another surgery to take out the scaffold/device and finalize the "plumbing". Is this approach easier to grow blood vessels and incubate tissue culture?