An optical buffer employing Bragg scattering, in which two pump signals are combined with an input signal in a four-wave mixing medium to frequency convert the input signal into an idler signal, which is applied to a dispersive medium, in which the idler signal propagates at a speed different from that of the input signal. The connection assembly is configured to have a locking mechanism that secures and fixes the relative orientation between the implant and the anchor member. The substance may be dispensed via an independent dispensing conduit or a shared dispensing conduit. A measuring unit measures at least one of a delay time caused by the semiconductor devices of the starved devices themselves, and a compound delay time caused by the semiconductor devices of the starved devices themselves plus a delay time caused by the interconnect lines. The therapeutic composition can be effectively administered into a damaged body tissue via injection or catheterization, thereby treating the damaged body tissue.