synovial fluid

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Related to synovial fluid: synovial joint, synovitis, synovial fluid analysis

syn·o·vi·al flu·id

a clear thixotropic fluid, the main function of which is to serve as a lubricant in a joint, tendon sheath, or bursa; consists mainly of mucin with some albumin, fat, epithelium, and leukocytes; synovial f. also helps to nourish the avascular articular cartilage.
Synonym(s): synovia [TA], joint oil

synovial fluid

See synovia.

syn·o·vi·al flu·id

(si-nō'vē-ăl flū'id) [TA]
A clear thixotropic fluid, the main function of which is to serve as a lubricant in a joint, tendon sheath, or bursa; consists mainly of mucin with some albumin, fat, epithelium, and leukocytes; synovial fluid also helps to nourish the avascular articular cartilage.
Synonym(s): synovia [TA] .

synovial fluid

a viscous fluid contained within a membrane enclosing moveable joints such as the elbow and knee. The fluid lubricates the cartilages which make the surface contact between the bones at the joint.

Synovial fluid (SF)

A transparent lubricating fluid secreted in a sac to protect an area where a tendon passes over a bone.

synovial fluid

clear, viscid, thixotropic fluid secreted by and enclosed within cells that line synovial membrane; lubricates synovial joints and bursae

synovial fluid (si·nōˑ·vē·l flōōˑ·id),

n viscous liquid found in synovial sheaths, bursae, and joints that delivers nutrition and provides lubrication for movement without friction. Also called

syn·o·vi·al flu·id

(si-nō'vē-ăl flū'id) [TA]
A clear thixotropic fluid, the main function of which is to serve as a lubricant in a joint, tendon sheath, or bursa.
Synonym(s): synovia [TA] .


1. a liquid or gas; any liquid of the body.
2. composed of molecules which freely change their relative positions without separation of the mass.

allantoic fluid
the fluid contained within the allantois.
amniotic fluid
the fluid within the amnion that bathes the developing fetus and protects it from mechanical injury.
ascitic fluid
see ascites.
fluid balance
a state in which the volume of body water and its solutes (electrolytes and nonelectrolytes) are within normal limits and there is normal distribution of fluids within the intracellular and extracellular compartments. The total volume of body fluids should be about 60% of the body weight, and it should be distributed so that one-third is extracellular fluid and two-thirds intracellular fluid. Although this distribution remains constant in a healthy animal, there is continuous movement of fluid into and out of the various compartments. See also dehydration, water intoxication.
body f's
the fluids within the body, composed of water, electrolytes and nonelectrolytes. The volume and distribution of body fluids vary with age, sex and amount of adipose tissue. Throughout life there is a slow decline in the volume of body fluids; obesity decreases the relative amount of water in the body.
Although the body fluids are continuously in motion, moving in and out of the cells, tissue spaces and vascular system, physiologists consider them to be 'compartmentalized'. Fluid within the cell membranes is called intracellular fluid and comprises about two-thirds of the total body fluids. The remaining one-third is outside the cell and is called extracellular fluid. The extracellular fluid can be further divided into tissue fluid (interstitial fluid), which is found in the spaces between the blood vessels and surrounding cells, and intravascular fluid, which is the fluid component of blood.
The maintenance of a proper balance between the intracellular and extracellular fluid volumes is essential to health. In patients with heart failure and renal failure the balance becomes upset, producing either localized or generalized edema. Excessive fluid loss produces fluid volume deficit causing cellular dehydration and impaired cellular function.
Bouin's fluid
a histological fixative.
cerebrospinal fluid
the fluid contained within the ventricles of the brain, the subarachnoid space, and the central canal of the spinal cord. See also cerebrospinal fluid.
fluid dram
see fluid dram.
fluid extract
a liquid preparation of a vegetable drug, containing alcohol as a solvent or preservative, or both, of such strength that each milliliter contains the therapeutic constituents of 1 gram of the standard drug it represents.
fetal fluid
allantoic plus amniotic fluids.
interstitial fluid
the extracellular fluid bathing the cells in most tissues, excluding the fluid within the lymph and blood vessels.
isotonic fluid
having the same tonicity or osmotic pressure as blood.
lacrimal fluid
aqueous fluid secreted by the lacrimal glands; called also tears.
fluid line
in radiographs, the interface between fluid and gas, as in the gastrointestinal tract, will show as a straight line.
fluid loss
by vomiting, diarrhea, polyuria, water deprivation. See dehydration.
fluid mosaic model
the modern concept of the structure of a biological membrane developed by S.J. Singer and G.L. Nicolson. In it the membrane consists of protein molecules partly embedded in a discontinuous bilayer of phospholipids that form the matrix of a mosaic of functional cell units.
fluid ounce
see fluid ounce.
pericardial, pleural, peritoneal fluid
normally present in amounts sufficient only to lubricate the movement of viscera within the respective cavities. Composition similar to blood serum.
fluid replacement
see fluid therapy (below).
fluid restriction
the limitation of oral fluid intake to a prescribed amount for each 24-hour period.
fluid retention
see edema.
spinal fluid
the fluid within the spinal canal.
fluid splashing sounds
audible when gas and fluid are free in a cavity, e.g. abomasum in cases of abomasal displacement; can be elicited by shaking a small animal or part of a large animal (i.e. succussion) or by simultaneous percussion and auscultation.
synovial fluid
fluid therapy
aims to replace fluids lost by disease process or by restriction of intake, or to maintain a high rate of fluid excretion to ensure removal of toxins, or to administer therapeutic or anesthetic agents slowly over a long period. The amounts and route of administration vary with the need of the patient. Normal solutions include 5% dextrose and Ringer's solution; alkalinizing fluids include lactated Ringer's and 1.3% sodium bicarbonate; acidifying solutions include isotonic saline and 1.9% ammonium chloride.
fluid thrill
see thrill.
fluid volume deficit
an imbalance in fluid volume in which there is loss of fluid from the body not compensated for by an adequate intake of water. The major causes are: (1) insufficient fluid intake, and (2) excessive fluid loss from vomiting, diarrhea, suctioning of gastric contents, or drainage through operative wounds, burns or fistulae. Decreased volume in the intravascular compartment is called hypovolemia. Because water moves freely between the compartments, extracellular fluid deficit causes intracellular fluid deficit (cellular dehydration), which leaves the cells without adequate water to carry on normal function.
fluid volume excess
an overabundance of water in the interstitial fluid spaces or body cavities (edema) or an excess of fluid within the blood vessels (hypervolemia) and water intoxication.
Factors that contribute to the accumulation of edematous fluid are: (1) dilatation of the arteries, as occurs in the inflammatory process; (2) reduced effective osmotic pressure, as in hypoproteinemia, lymphatic obstruction and increased capillary permeability; (3) increased venous pressure, as in congestive heart failure, thrombophlebitis and cirrhosis of the liver; and (4) retention of sodium due to increased reabsorption of sodium by the renal tubules.
fluid wave
see thrill.


of, pertaining to, or secreting synovia.

synovial fluid
a protein-free dialysate of plasma with added hyaluronate, glycoproteins and other unidentified substances added by the synovial membrane. Called also synovia.
synovial folds
pleats of synovial membrane infoldings into joint cavities.
synovial fossa
nonarticulating areas in synovial joint articular surfaces found in the larger joints of larger animals. They are recessed below the surface of the cartilage and are unevenly sculpted.
synovial gout
see articular gout.
synovial joint
a specialized form of articulation permitting more or less free movement, the union of the bony elements being surrounded by an articular capsule enclosing a cavity lined by synovial membrane. Called also diarthrosis.
synovial membrane
the inner of the two layers of the articular capsule of a synovial joint; composed of loose connective tissue and having a free smooth surface that lines the joint cavity; it secretes the synovia.
synovial mucin
the lubricant in synovial joints; an acidoglycoprotein, the acid polysaccharide portion of which is hyaluronic acid.
synovial villus
see synovial villus.
References in periodicals archive ?
Distinct serum and synovial fluid interleukin (IL)-33 levels in rheumatoid arthritis, psoriatic arthritis and osteoarthritis.
A study in horses demonstrated a statistically significant increase in the levels of all metabolites (lactate, alanine, acetate, N-acetylglucosamine, pyruvate, citrate, creatine/ creatinine, glycerol, HDL choline, and [alpha]-glucose) in OA synovial fluid when compared to healthy controls (36).
Zymography technique with gelatin as a substrate indicated that both the serum and the synovial fluid of all investigated patients contain matrix metalloproteinase 2 and 9 (Fig.
For those patients whose synovial fluid PCR result is negative, intraarticular application of corticosteroids can be beneficial (15).
Microscopic examination: Wet mount prepared by placing a drop of synovial fluid previously mixed with EDTA on a glass slide and TLC, DLC and wet smear examination was done.
The individuals without detectable circulating filarial antigen in serum or synovial fluid were designated as [CFA.
Immunocytochemical and immunohistochemical methods were applied to detect Chlamydia and its particles in the synovial tissue and/or synovial fluid [5-7].
Samples of bone marrow, lymph node, spleen and skin lesions are currently used for the parasitological diagnosis of leishmaniasis in naturally infected dogs, however the use of synovial fluid (SF) for this propose has been rarely reported (SARIDOMICHELAKIS et al.
Technological advances in hardware and software engineering have developed instruments with expanded analytical capabilities that enable processing multiple specimen types including urine, CSF, peritoneal fluid, pleural fluid, synovial fluid, and lavages on a single analyzer.
The primary form occurs as ectopic cartilage within synovial fluid without identifiable joint pathology.