NXSTAGE EXPRESS FLUID WARMER
Device Facts
| Record ID | K140623 |
|---|---|
| Device Name | NXSTAGE EXPRESS FLUID WARMER |
| Applicant | Nxstage Medical, Inc. |
| Product Code | FLA · Gastroenterology, Urology |
| Decision Date | Jun 16, 2014 |
| Decision | SESE |
| Submission Type | Special |
| Regulation | 21 CFR 876.5820 |
| Device Class | Class 2 |
| Attributes | Therapeutic |
Indications for Use
The NxStage Express Fluid Warmer and Express Fluid Warmer Disposable Set are accessories to the NxStage System One Cycler used to warm dialysate prior to administration.
Device Story
The NxStage Express Fluid Warmer is an electro-mechanical accessory for the NxStage System One Cycler. It warms dialysate prior to administration using an aluminum plate heated by electrical resistance. The system includes a single-use disposable set. It is operated in a clinical or home setting as part of the dialysis workflow. A microcontroller manages temperature control via thermistors, maintaining fluid between 31°C and 38°C. Audible and visual alarms trigger if temperatures reach 41°C. A secondary hardware safety circuit cuts power if the fluid temperature remains ≥41°C for more than 5 seconds. The device ensures dialysate is at an appropriate temperature for patient comfort and therapy efficacy.
Clinical Evidence
Bench testing only. No clinical data provided. Performance, verification, and validation testing demonstrated that the device is adequately designed for its labeled indications and performs equivalently to the predicate device.
Technological Characteristics
Electro-mechanical warming unit; aluminum heating plate; electrical resistance heating; thermistor-based temperature control; microcontroller-based system; 100-120/230 VAC auto-ranging power; audible/visual alarms; secondary hardware safety circuit (power cutoff at ≥41°C for >5s); materials: PVC, ABS; single-use disposable set; gamma sterilization (SAL 10^-6).
Indications for Use
Indicated for use as an accessory to the NxStage System One Cycler to warm dialysate prior to administration. Not for use with blood or blood products.
Regulatory Classification
Identification
A hemodialysis system and accessories is a device that is used as an artificial kidney system for the treatment of patients with renal failure or toxemic conditions and that consists of an extracorporeal blood system, a conventional dialyzer, a dialysate delivery system, and accessories. Blood from a patient flows through the tubing of the extracorporeal blood system and accessories to the blood compartment of the dialyzer, then returns through further tubing of the extracorporeal blood system to the patient. The dialyzer has two compartments that are separated by a semipermeable membrane. While the blood is in the blood compartment, undesirable substances in the blood pass through the semipermeable membrane into the dialysate in the dialysate compartment. The dialysate delivery system controls and monitors the dialysate circulating through the dialysate compartment of the dialyzer.(1) The extracorporeal blood system and accessories consists of tubing, pumps, pressure monitors, air foam or bubble detectors, and alarms to keep blood moving safely from the blood access device and accessories for hemodialysis (§ 876.5540) to the blood compartment of the dialyzer and back to the patient. (2) The conventional dialyzer allows a transfer of water and solutes between the blood and the dialysate through the semipermeable membrane. The semipermeable membrane of the conventional dialyzer has a sufficiently low permeability to water that an ultrafiltration controller is not required to prevent excessive loss of water from the patient's blood. This conventional dialyzer does not include hemodialyzers with the disposable inserts (Kiil type) (§ 876.5830) or dialyzers of high permeability (§ 876.5860). (3) The dialysate delivery system consists of mechanisms that monitor and control the temperature, conductivity, flow rate, and pressure of the dialysate and circulates dialysate through the dialysate compartment of the dialyzer. The dialysate delivery system includes the dialysate concentrate for hemodialysis (liquid or powder) and alarms to indicate abnormal dialysate conditions. This dialysate delivery system does not include the sorbent regenerated dialysate delivery system for hemodialysis (§ 876.5600), the dialysate delivery system of the peritoneal dialysis system and accessories (§ 876.5630), or the controlled dialysate delivery system of the high permeability hemodialysis system § 876.5860). (4) Remote accessories to the hemodialysis system include the unpowered dialysis chair without a scale, the powered dialysis chair without a scale, the dialyzer holder set, dialysis tie gun and ties, and hemodialysis start/stop tray.
Predicate Devices
- NxStage Travel Warmer (K071263)