When it comes to fluid warming, there is a system that can help you maintain normothermia with accuracy, mobility and speed. The enFlow* system from GE Healthcare delivers the right temperature in the right place at the right time. enFlow can help providers deliver higher quality care to more people—part of GE’s healthymagination commitment.

The Right Temperature
By consistently helping to maintain the right patient temperature, enFlow brings the opportunity for both clinical and economic benefits to your hospital. Maintaining normothermia can help lessen complications and speed up recovery time – all while reducing length of stay and hospital costs.1

The Right Place
True system mobility and a small transferable cartridge allow enFlow to help maintain normothermia in the right place-- throughout all care areas.  It can be used before, during and after procedures, and because its cartridge is easily transported from room to room, enFlow maintains your workflow while saving steps.

The Right Time
The enFlow system enables warmed infusate delivery at the right time across all clinical areas—right away, and within seconds. Its low priming volume reduces the time needed to reach temperature set point thus allowing the warming process to start quickly, while its close proximity to the patient reduces heat loss across the IV line.

1. Mahoney, CB and Odom, J. Maintaining Intraoperative Normothermia: A Meta-Analysis of Outcomes with Costs. AANA Journal/April 1999/Vol 67; No 2.

Products & Accessories

enFlow Products

The enFlow IV Fluid/Blood Warming System warms blood, blood products and intravenous solutions rapidly and automatically to a target temperature of 40 °C to help prevent hypothermia. According to one study, enFlow is appropriate for up to 98% of all cases.1

There are three main components to the enFlow system (click on image to enlarge):

enFlow Controller




The controller unit serves as the power supply for the warmer unit. It is designed to mount on an IV pole or sit on a table top. The front panel includes a temperature display and keypad. Regardless of the unit’s orientation, the temperature readout is always displayed in a “right side up” view.



enFlow Warmer

The warmer is designed to work in conjunction with the disposable cartridge to warm fluids. The innovative design of the enFlow warmer allows it to be placed within inches of the IV site. This proximity reduces the potential for fluid cooling within the IV line. The unit uses dry-heat technology to attain a temperature of 40 °C ± 2 °C. The warmer is very lightweight and transportable, weighing only 9.5 oz (275g).


enFlow Disposable Cartridge

The sterilized, disposable cartridge can be connected to any IV set. The warmer is designed so that the cartridge cannot be inserted incorrectly. All cartridges are radiation-sterilized, non-pyrogenic, and are not made with natural rubber latex.




enFlow Accessories

There are seven main accessories to the enFlow system (click on image to enlarge):

Disposable Sterile Cartridges

Patient-dedicated cartridges require less than 4 mL priming volume and can be placed in-line like other IV components -- using standard priming and aseptic techniques. The cartridge can stay in-line and travel with the patient for up to 24 hours, even when warming is not needed.




Disposable Sterile Cartridge with 3 in (8 cm) Extension Set

A cartridge with a 3 in extension set (overall length 5 in or 12.5 cm) is also available for customers that require extra length at the end of the cartridge to allow for the placement of IV stopcocks or other IV line components to meet hospital-specific practice requirements.


Warmer Holder

The warmer holder affixes to the side of the controller to allow clinicians a place to hang the warmer when it is not in use. This provides effective transportability and minimizes the likelihood the warmer will be dropped and potentially damaged.


enCheck* Testing Tool

The enCheck Tester was developed to quickly and reliably trigger the over-temperature alarm condition on the enFlow Warmer. Within seconds, the enCheck unit will heat the warmer to an over-temperature scenario -- causing the alarm to sound. enCheck is also designed to verify the warmer operation at the installation site. Unlike other fluid warming products that often require monthly maintenance and testing, enCheck allows hospitals to confidently use the product for testing required once every 5 years – or as mandated by accrediting bodies.


Power Cord

The power cord plugs into the back of the controller to supply power to the system and requires 5A of current. The length of the cord allows the unit to be placed very close to patients.


Cord Clip

The cord clip allows care givers to affix the cord of the warmer to the patient’s bed sheet or clothing -- ensuring the warmer stays in place in transport.


Anesthesia Mount

This mount allows you to affix the enFlow warming system to your anesthesia delivery equipment in the OR. We all know the OR can get crowded; with a mount, clutter is reduced and your staff has fewer obstacles in its way.


1. Sessler DI, Kurz A. Mild Perioperative Hypothermia. Anesthesiology News, September 2007, p. 1-12.


enFlow Specifications

13 cm x 6 cm x 3 cm (5.0 in. x 2.5 in. x 1.2 in.)

23 cm x 15 cm x 9 cm (9.0 in. x 6.0 in. x 3.8 in.)

Disposable Cartridge
11 cm x 4 cm x 1 cm (4.5 in. x 1.5 in. x 0.4 in.)

Warmer (w/o Disposable): 275 g (9.7 oz.)
Controller: 1.6 kg (3.6 lb.)
Disposable Cartridge: 35 g (1.3 oz.)

Download the enFlow Specification Sheet

Performance Detail

Disposable Cartridge Printing Volume
4 mL

Disposable Cartridge Sterility
Gamma Sterilized

Fluid Temperature Output
40 °C ± 2 °C

Flow Rate Range
KVO to 200 mL/min

Input Voltage
Warmer: 28 VDC at a maximum of 300 Watt
Controller: 110-120 or 220-240 VAC 47 - 63 Hz


The enFlow IV Fluid/Blood Warming System is an important tool to help you reach your patient-warming goals.  By warming fluids with accuracy, mobility and speed, enFlow delivers the right temperature in the right place at the right time.


  • The system warms fluids automatically to 40 ± 2°C and has redundant sensors to ensure fluid temperature accuracy.
  • The lightweight warmer (9.5 oz) can be placed close to the patient -- allowing less opportunity for fluid-cooling in the IV line.
  • It has a low priming volume (4mL), which reduces waste and improves control over fluid composition.
  • The warmer incorporates a layer that transfers heat effectively and prevents hot spots.


  • When it’s time to move, the cartridge and the IV set are removed from the warming unit only to be reinserted into a warmer in the next area.
  • The warming unit and power source are highly durable and have been shock and vibration tested.
  • The cartridge may stay in-line to protect the IV set from potential infection -- whether fluid is being warmed or not.
  • The enFlow cartridge can be used for 24 hours of continuous patient warming.


  • It warms fluids rapidly (18 s or less) to a temperature of 40 °C, so there’s no time spent waiting to warm (other warmers can take over 10 min).1
  • The cartridge attaches in-line to standard IV sets at the start of procedures, so there’s no additional set-up or tubing requirements.
  • It offers one-button operation. It's intuitive and relatively easy to operate, simply turn on the power and be warming within seconds.
  • It requires little preventive maintenance (five year schedule) and no calibrations.


1. Vital Signs Devices.  Fluid Warming Time Using 20ºC Fluid to Achieve 37ºC. 150 mL/min. Testing was performed using a 9” extension set and 20°C distilled water – Company data on file.

Care Areas

See how the enFlow IV Fluid/Blood Warming System gives care givers an effective way to warm continuously across the perioperative care continuum.

Labor & Delivery
Learn how early and continuous warming enabled by enFlow means more patients may have their core temperatures maintained across the Labor & Delivery care pathway.

Emergency Care
See how enFlow lets you take patient warming precautions early, to prevent the emergence of hypothermia and other negative patient outcomes in the ED.

Intensive Care
Learn how, with enFlow, you can be confident that you’re helping patients maintain the right temperature in the right place at the right time while in the ICU.

Blood Transfusions
See how the enFlow IV Fluid/Blood Warming System allows you to warm blood products across key hospital settings with accuracy, mobility and speed.

About enFlow

enFlow was built on principles of innovation and clinical leadership. Learn more about this groundbreaking IV fluid delivery system and how it came to be through the timeline below.

2006 - System Received Clearance
enFlow’s roots began in 2006 at Enginivity, a medical device development company based in Lexington, MA. From the beginning, Enginivity was dedicated to the research, design, development, and production of medical equipment and accessories related to the IV fluid warming market for military and civilian customers. Grounded in principles of innovation and clinical leadership, Enginivity received 510(k) clearance in May 2006 for an IV fluid delivery system technology called enFlow.

2007 - Acquired by Vital Signs Inc.
Vital Signs, a New Jersey-based medical device company, acquired Enginivity in August 2007. The enFlow product line was a natural fit for Vital Signs, a company seen as a product innovator in delivering single-patient use products designed to help in the prevention of nosocomial infections.

2008 - enFlow Joins GE Healthcare
Recognizing its innovation and market leading position in the clinical consumables business, GE Healthcare acquired Vital Signs in October 2008. Since that time, Vital Signs and the enFlow product line have become a part of GE's Healthcare Systems business, a world-class provider of patient monitoring, anesthesia delivery and acute respiratory care products. The strong strategic fit between the two businesses has offered substantial customer benefits through complementary product and service offerings.

Today the enFlow system from GE Healthcare continues to be an essential tool in helping reduce patient hypothermia in hundreds of hospitals across the United States.  It does this by delivering the right temperature in the right place at the right time. enFlow helps providers deliver higher quality care to more people—part of GE’s healthymagination commitment.



Patient Warming Education

Frequently Asked Questions



Reference Sites