Abstract: An ablation catheter includes an elongated sheath configured for intravascular usage, and an inner tube disposed within the elongated sheath. The inner tube is rotatable and translatable relative to the sheath. An optical fiber is disposed within the inner tube and extends longitudinally therethrough. A proximal end of the optical fiber is optically coupled to a light source and a distal end of the optical fiber is connected to a beam director configured to focus energy on target tissue inside a blood vessel to ablate the target tissue.

Abstract: Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculent and superior dewatering ability.

Abstract: Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculant and superior dewatering ability.

Abstract: A freeze-thaw stable, self-inverting, water-in-oil emulsion comprising an aqueous phase of a copolymer of acrylic acid, a hydrocarbon oil, a water-in-oil emulsifying agent and an inverting surfactant comprising a fatty alcohol-ethylene oxide reaction product and a method for the preparation thereof.

Abstract: A freeze-thaw stable, self-inverting, water-in-oil emulsion comprising an aqueous phase of a polymer of acrylamide, a hydrocarbon oil, a water-in-oil emulsifying agent and an inverting surfactant mixture comprising sodium bis(2-ethylhexyl)sulfosuccinate and a sodium bis(C.sub.11 -C.sub.15 alkyl)sulfosuccinate or an ethoxylated octyl or nonyl phenol and a method for the preparation thereof.