Abstract: A multi-sectional utility pole includes at least two sections of straight pipe, which are joined and connected by a slip joint connection. The slip joint consists of two mating conical sections, with one attached to each section of the pole. The slip joint is compressed with the aid of rings, which are attached to the pipe, and a key and slot. The conical sections can be swaged from the ends of the pipe, or can be fabricated separately and welded on to the ends of the pipe.

Abstract: A coolant system for a cryoablation or treatment probe such as a mapping or ablation catheter, or a treatment wand, includes a compressor and condenser having a low pressure inlet side and a high pressure outlet side, wherein the outlet side passes through a heat exchanger and is cooled by the inlet side and conditioned for injection to a catheter inlet. A vacuum return system connectable to the catheter outlet draws thermally expended coolant from the catheter and returns it to the low pressure inlet side. A motorized pressure regulator between the heat exchanger and the catheter inlet determines the pressure of coolant passing into the catheter and thus regulates the cooling rate for a selected mapping or ablation regimen. The low pressure compressor inlet supply preferentially conditions the pressurized coolant to ambient temperature or lower before injection into the catheter, allowing the coolant to travel through the body at ambient before expansion in the tip.