colloid solution

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Related to colloid solution: crystalloid solution, suspension colloid


1. a homogeneous mixture of one or more substances (solutes) dispersed molecularly in a sufficient quantity of dissolving medium (solvent).
2. in pharmacology, a liquid preparation of one or more soluble chemical substances, which are usually dissolved in water. For names of specific solutions, see under the name.
3. the process of dissolving or disrupting.
4. a loosening or separation.

Preparation of Solutions. Formula for preparing solutions from a pure drug:

For example, to prepare 2000 mL of a 2 per cent solution from boric acid crystals, the proportion would be

Formula for preparing solutions from stock solutions:

For example, to prepare 1000 mL of a 2 per cent solution from a 4 per cent stock solution, the proportion would be
aqueous solution one in which water is used as the solvent.
BCG solution an aqueous suspension of bacille Calmette-Guérin for instillation into the bladder to activate the immune system in treatment of superficial bladder cancers. It reduces the risk of a subsequent bladder cancer developing, although the exact mechanism of action is unknown.
buffer solution one that resists appreciable change in its hydrogen ion concentration (pH) when acid or alkali is added to it.
colloid solution (colloidal solution) imprecise term for colloid (def. 3).
hyperbaric solution one having a greater specific gravity than a standard of reference.
hypertonic solution one having an osmotic pressure greater than that of a standard of reference.
hypobaric solution one having a specific gravity less than that of a standard of reference.
hypotonic solution one having an osmotic pressure less than that of a standard of reference.
isobaric solution a solution having the same specific gravity as a standard of reference.
isotonic solution one having an osmotic pressure the same as that of a standard of reference.
molar solution a solution in which each liter contains 1 mole of the dissolved substance; designated 1 M. The concentration of other solutions may be expressed in relation to that of molar solutions as tenth-molar (0.1 M), etc.
normal solution a solution in which each liter contains 1 equivalent weight of the dissolved substance; designated 1 N.
ophthalmic solution a sterile solution, free from foreign particles, for instillation into the eye.
saturated solution one in which the solvent has taken up all of the dissolved substance that it can hold in solution.
sclerosing solution one containing an irritant substance (sclerosing agent) that will cause obliteration of a space, as in sclerotherapy.
standard solution one that contains in each liter a definitely stated amount of reagent; usually expressed in terms of normality (equivalent weights of solute per liter of solution) or molarity (moles of solute per liter of solution).
supersaturated solution an unstable solution containing more of the solute than it can permanently hold.
volumetric solution one that contains a specific quantity of solvent per stated unit of volume.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

colloid solution

Fluid therapy A suspension of particles that are so small–1 nm to 1 µm in diameter—that they don't settle out of solution without external force–eg, centrifugation Transfusion medicine
A balanced solution–eg, Dextran 40, Dextran 70, used for volume expansion Pros Composed of HMW substances retained in vessels, unassociated with peripheral edema Cons Allergic reactions; ↑ cost. Cf Crystalloid solution.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The optimal choice of intravenous fluid replacement therapy for perioperative and critically ill patients remains highly controversial, especially after many studies on colloid solutions published by Boldt were retracted recently.
After electrodeposition on the ITO substrate coated with the Ag-seeds, the samples were characterized by XRD firstly, as shown in Figure 2(A) (curve (a), (b), (c) corresponding to samples obtained preimmersed Ag seeds colloid solution for 4h, 8h, 10 h), and the intensity of diffraction increase gradually with increasing immersing time.
It could be attributed to the interaction of the plasmons with incident light due to the absorption of Ag nanoparticles from the colloid solution.
A different approach for the formation of nanostructured 2D assemblies of noble metals is to bind a pre-prepared colloid solution of nanoparticles to a beforehand treated substrate.
Thirteen units of RBC, 2 units of FFP, 11,000 ml of crystalloid and 1000 ml of colloid solutions were administered.
Colloid solutions contain large, osmotically active molecules that cannot escape from the plasma and so act to keep infused water within the intravascular space (see Figure 1, p20).
This is because colloid solutions contain larger molecules that stay in vascular compartment for longer duration and help maintain stable hemodynamics.
Cardiff based rapid-testing company BBI Holdings has reported a positive start to its new financial year, with a possible expansion on the horizon The company manufactures gold colloid solutions used in rapid tests and produces rapid tests for salmonella, illegal drugs and other substances.
of the kaolinite group) were transformed into amorphous materials (allophanes), which mixed with colloid solutions and organic gels.
The isovolemic exchange of whole blood for cell-free crystalloid or colloid solutions during surgery is a low-tech technique used successfully for 20-30 years, and one that is based on a simple principle, said Dr.
Effects of saline and colloid solutions on pulmonary function in hemorrhagic shock.
The effects of colloid solutions on renal proximal tubular cells in vitro.