FISHER & PYKEL / Low- and Bias-Flow Neonatal Circuits . Single Heated Breathing Circuit >4LPM (box of 10) Fisher & Paykel Healthcare High Performance Circuits Fisher & Paykel Healthcare offer a line of high-performance circuits that have spiral heated wire technology that is unique in the industry. This technology increases the heating surface area in the circuit for superior condensate control and allows for delivery of optimal humidity to patients. Fisher & Paykel High Performance Circuits are part of the MR850 humidification system and may also be used with the MR730 humidifiers. Fisher & Paykel circuits also feature parallel Y, built-in MDI port, proximal pressure line, adapter kits and water traps, depending on the circuit configuration.