A catheter comprising: a basket comprising: a shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end and defining a longitudinal axis, wherein a plurality of helical cuts along at least a portion of the shaft between the inner and outer surface of the wall form a plurality of tines; wherein the proximal end of the shaft is uncut; and a plurality of tubes, each tube comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end; wherein the plurality of tubes are melted together and to an outside of the shaft at the uncut proximal end of the shaft; wherein each of the plurality of tines of the shaft is disposed in the lumen of each of the plurality of tubes to form a plurality of limbs; wherein the distal end of each of the plurality of limbs is attached and the proximal end of each of the plurality of limbs is attached; an inner shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end, wherein the inner shaft is disposed coaxially within the lumen of the shaft and is attached to the distal end of the basket; and an outer shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end, wherein the outer shaft is disposed coaxially around the inner shaft to form a fluid compartment between the inner surface of the outer shaft and the outer surface of the inner shaft, wherein: the proximal end of the limbs of the basket is connected to the fluid compartment, and the connection between the proximal end of the limbs of the basket and the fluid compartment comprises a seal disposed between the inner shaft and the proximal end of the plurality of limbs and the seal extends distally from the outer shaft. a shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end and defining a longitudinal axis, wherein a plurality of helical cuts along at least a portion of the shaft between the inner and outer surface of the wall form a plurality of tines; wherein the proximal end of the shaft is uncut; and a plurality of tubes, each tube comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end; wherein the plurality of tubes are melted together and to an outside of the shaft at the uncut proximal end of the shaft; wherein each of the plurality of tines of the shaft is disposed in the lumen of each of the plurality of tubes to form a plurality of limbs; wherein the distal end of each of the plurality of limbs is attached and the proximal end of each of the plurality of limbs is attached; an inner shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end, wherein the inner shaft is disposed coaxially within the lumen of the shaft and is attached to the distal end of the basket; and an outer shaft comprising a wall with an inner surface and an outer surface and a lumen extending between a distal end and a proximal end, wherein the outer shaft is disposed coaxially around the inner shaft to form a fluid compartment between the inner surface of the outer shaft and the outer surface of the inner shaft, wherein: the proximal end of the limbs of the basket is connected to the fluid compartment, and the connection between the proximal end of the limbs of the basket and the fluid compartment comprises a seal disposed between the inner shaft and the proximal end of the plurality of limbs and the seal extends distally from the outer shaft. the proximal end of the limbs of the basket is connected to the fluid compartment, and the connection between the proximal end of the limbs of the basket and the fluid compartment comprises a seal disposed between the inner shaft and the proximal end of the plurality of limbs and the seal extends distally from the outer shaft.