Apparatus for delivering ablation fluid to treat lesions

A surgical apparatus for delivering fluid to treat a lesion comprising:

• a housing;
• a hollow elongated member extending from the housing;
• first and second tines positioned in the elongated member, each of the tines having a lumen and at least one opening communicating with the lumen for delivering fluid to the lesion, the first and second tines movable between a retracted position, a first deployed position and a second deployed position;
• and
• an actuator operatively associated with the tines, the actuator movable in a first direction to move the first and second tines from the retracted position to the first deployed position and movable in a second direction to move the first and second tines from the retracted position to the second deployed position, the second direction being different from the first direction, and in the second deployed position the first and second tines are advanced further from the elongated member than in the first deployed position.

An apparatus for delivering fluid to treat tumors comprising:

• a housing;
• an elongated member extending from the housing;
• a plurality of tines positioned in the elongated member, each of the tines having a lumen and at least one opening communicating with the lumen for delivering fluid to the lesion;
• and
• an actuator operatively associated with the plurality of tines, the actuator actuable to a first position to move the plurality of tines from a retracted position substantially within the elongated member to a first deployed position extending distally of the elongated member and actuable to a second position to move the plurality of tines from the retracted position to a second deployed position extending distally of the elongated member, the actuator movable to the second position without movement to the first position.

An apparatus for treating tumors comprising:

• a housing;
• an elongated member extending from the housing;
• a plurality of tines positioned in the elongated member, each of the tines having a lumen and at least one opening communicating with the lumen for delivering fluid to the lesion, the tines being removably positioned within the elongated member;
• a release mechanism operatively associated with the plurality of tines, the release mechanism operable to release the plurality of tines from the elongated member to enable withdrawal from the apparatus;
• and
• an actuator operatively associated with the tines, the actuator actuable to move the plurality of tines from a first position substantially within the elongated member to a deployed position extending from the elongated member.

A method for treating a lesion comprising:

• inserting an apparatus adjacent the lesion;
• rotating an actuator in a first direction and advancing the actuator in a distal direction to deploy a plurality of tines from the apparatus;
• and
• injecting ablation fluid through a plurality of openings in the tines to ablate the lesion.