I want all details about baclofen pump coz oral baclofen has failed to help me?

Sorry this question has not been answered earlier for you!
Baclofen can be taken orally as a pill or delivered directly into an area of the spine called the intrathecal space using an Intrathecal Pump.
The intrathecal space contains the cerebrospinal fluid -- the fluid surrounding the spinal cord and nerve roots. Often MS patients receive intrathecal baclofen because oral baclofen causes unpleasant side effects, such as confusion, weakness, and sleepiness. But intrathecal baclofen delivers the drug right to the target site in the spinal cord. Since the drug does not circulate throughout the body, only tiny doses are required to be effective. Therefore, side effects are minimal.

The intrathecal baclofen pump system consists of a catheter (a small, flexible tube) and a pump. The pump -- a round metal disc, about one inch thick and three inches in diameter -- is surgically placed under the skin of the abdomen near the waistline.

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The pump stores and releases prescribed amounts of medicine through the catheter. With a programmable pump, a tiny motor moves the medication from the pump reservoir through the catheter. Using an external programmer, your treatment team can make adjustments in the dose, rate, and timing of the medication.

People with the pump must return to their doctor's office for pump refills and medication adjustments, typically every one to three months. The pump is taken out and replaced at the end of the battery's life span (which is usually five to seven years).