Percutaneous array delivery system

A tissue treatment system comprising:

• an elongated treatment device having a proximal end a distal end and a lumen extending there between, the elongated treatment device comprising at least one extension projecting therefrom;
• a shaft slidably disposed with the lumen of the elongated treatment device, the shaft including a plurality of delivery tubes carried by a distal portion of the shaft, the delivery tubes including respective lumens configured for carrying a treatment material;
• a plunger assembly slidably disposed relative to the shaft and configured to push the treatment material out of the respective lumens of the delivery tubes;
• and
• an indexing device comprising a receiving portion having a plurality of slots configured to receive the at least one extension, at least some of the plurality of slots having different lengths.

A tissue treatment system comprising:

• an elongated treatment device having a proximal end a distal end and a lumen extending there between, the elongated treatment device comprising a plurality of slots, at least some of the plurality of slots having different lengths;
• a shaft slidably disposed with the lumen of the elongated treatment device, the shaft including a plurality of delivery tubes carried by a distal portion of the shaft, the delivery tubes including respective lumens configured for carrying a treatment material;
• a plunger assembly slidably disposed relative to the shaft and configured to push the treatment material out of the respective lumens of the delivery tubes;
• and
• an indexing device comprising a receiving portion having at least one extension projecting from the receiving portion and configured to engage with the plurality of slots in the handle body.

A method for treating tissue, comprising:

• placing an indexing device against a surface of a body, the indexing device comprising at least one extension projecting from the indexing device;
• inserting a treatment device into the indexing device, the treatment device including a plurality of slots, at least some of the plurality of slots having different lengths;
• deploying a plurality of delivery tubes from the treatment device such that the plurality of delivery tubes are at a first position within a target tissue region;
• and
• delivering a treatment material from the plurality of delivery tubes to the target tissue region.