(redirected from hetastarch)
Also found in: Dictionary, Medical.


A material used to dilute or extend or change the properties of resins, ceramics, paints, rubber, and so on.
A male or female receptacle connected by a short cable to make a test point more conveniently accessible to a test probe.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. A white, inert mineral pigment of low opacity; used in paints to provide bulk, texture, or a lower gloss or to reduce paint cost. Common extenders are calcium carbonate, silica, diatomaceous earth, talc, and clay.
2. A substance added to synthetic resin adhesives to increase volume and reduce cost without affecting quality.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

bus extender

(1) A board that pushes a printed circuit board out of the way of surrounding boards for testing purposes. It plugs into an expansion slot, and the expansion card plugs into the bus extender.

(2) A device that extends the physical distance of a bus. See repeater.

(3) A device that increases the number of expansion slots. It is either an expansion card containing multiple expansion slots, or an expansion card that cables to a separate housing that contains the slots and its own power supply.

DOS extender

Software that enabled a DOS application to run in extended memory, which is beyond 1MB (that's right... "one megabyte"). Windows 3.0 included a DOS extender. It may seem ridiculous today, but by breaking the 1MB limit, Windows 3.0 solved a very thorny issue and became very popular.

To gain access to extended memory, the extender ran the application in Protected Mode. When the application requested DOS services, the DOS extender handled them. For functions such as a disk access, it reset the machine to Real Mode so DOS could handle them and then switched back to Protected Mode. See VCPI, DPMI and Protected Mode.

Media Center Extender

A digital media hub from Microsoft that streams photos, audio and video from a Windows Media Center PC to the TV or home theater over a wired or wireless network connection. Connected to the TV set like a set-top box, the Media Center Extender (MCX) streams audio and video from the Media Center PC while other applications can be run at the same time.

Multiple MCXs can be used in different parts of the home simultaneously, each receiving different output from the computer. For gamers, Microsoft's Xbox game console has a built-in MCX and can operate both as a gaming machine and digital media hub. See Windows Media Center and digital media hub.

range extender

A device that boosts a communications signal to reach a greater distance. Range extenders are available for Wi-Fi hotspots, cellular networks and cordless phones. They can also increase the length of Ethernet and USB connections. See Wi-Fi extender, cellular network extender, powerline adapter and powerline network.

Wi-Fi extender

A device that extends a Wi-Fi signal for greater coverage. A Wi-Fi extender picks up the signals from a specific Wi-Fi access point and, depending on the brand and model of the device, either boosts the signals under the same network name (SSID) or under a new SSID that must be created and configured. Newer extenders support both the 2.4 and 5 GHz frequency bands. See SSID, Wi-Fi and cellular network extender.

NETGEAR Wi-Fi Extenders
For 802.11ac speed and large homes, the Nighthawk extender (top) covers up to 10,000 square feet, while the 802.11n N300 plugs directly into a wall outlet (see 802.11). (Images courtesy of NETGEAR, www.netgear.com)
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
The owl was treated with mannitol (0.5 g/kg IV over 15 minutes) followed by a hetastarch bolus (10 mL/kg IV over 15 minutes), then placed on continuous rate infusion of crystalloid fluids (lactated Ringer's solution, 100 mL/kg) over the next 24 hours.
Although a 1 l infusion of 6% hetastarch was well tolerated in normal subjects [8], this volume may not be tolerated in some ill patients, but using a lesser volume would result in increased estimation errors.
Orth et al., "Changes in blood volume and hematocrit during acute preoperative volume loading with 5% albumin or 6% hetastarch solutions in patients before radical hysterectomy," Anesthesiology, vol.
The patient also received about 6 ml/kg 6% hetastarch. During surgery, increased bleeding from the liver bed was noted.
The choice of replacement fluid includes crystalloids, semisynthetic colloids (hetastarch, gelatin, and dextrans), human albumin solutions, liquid stored plasma, fresh-frozen plasma (FFP), and cryoprecipitate.
Consequently, for the past decade the Tactical Combat Casualty Care committee recommended Hextend, a hetastarch based product in a balanced salt solution, as the fluid of choice for small volume resuscitation, with guidance to limit the total infusion to one liter based on the casualty's mental status or pulse character.
Wilkes NJ, Woolf R, Mutch M, Mallett SV, Peachey T, Stephens R, Mythen MG 2001 The effects of balanced versus saline-based hetastarch and crystalloid solutions on acid-base and electrolyte status and gastric mucosal perfusion in elderly surgical patients Anesthesia & Analgesia 93 811-816
Hextend (6% Hetastarch in Lactated Electrolyte Injection) is BioTime's commercially-available blood plasma volume expander used to treat hypovolemia (low blood volume).
Common colloids include whole blood, packed red blood cells (RBCs), plasma, Hetastarch (hydroxyethyl starch), and dextrans (Dextran 70 and Dextran 40).