| 摘要 |
A method and system for continuously delivering cryotreatment to a treatment device. In one embodiment, the system may include a first PID circuit in the fluid delivery line and a second PID circuit in the fluid return line, and the first and second PID circuits may operate simultaneously to continuously provide coolant to a cryotreatment device during the inflation phase, ablation phase, and warming (or thawing) phase while providing for temperature adjustment. Alternatively, the system may include a bypass line by which coolant may bypass the subcooler system and be delivered to the cryotreatment device at non-ablation temperatures during the inflation phase. During the ablation phase, coolant may flow through the subcooler system. |
| 主权项 |
1. A continuous flow cryotreatment system, the cryotreatment system comprising:
a fluid supply; a fluid injection line in communication with the fluid supply, the fluid injection line including a first PID circuit having a first PID controller, a first pressure transducer, and a first proportional valve; a cryotreatment device having a treatment element in communication with the fluid injection line; a fluid return line in communication with the cryotreatment device, the fluid return line including a second PID circuit having a second PID controller, a second pressure transducer, and a second proportional valve; and a vacuum source in communication with the fluid return line, the system being programmable to operate in an inflation phase, a treatment phase, and a warming phase, the first PID circuit and second PID circuit simultaneously operating to control the temperature of the treatment element during the inflation phase, the ablation phase, and the warming phase. |
