(redirected from hyperaemia)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to hyperaemia: hyperemia


An excess of blood within an organ or tissue caused by blood vessel dilation or impaired drainage, especially of the skin.



also plethora, an excess of blood in a tissue or organ. One may distinguish arterial and venous hyperemia. Arterial (active) hyperemia arises as a result of increased blood flow in the arteries owing to increased tonus of the vasodilator nerves or decreased tonus of the vasoconstrictor nerves. Among its causes are increased sensitivity of the blood vessels to physiological stimuli or the influence of extraordinary stimuli (such as bacterial toxins, high temperature, and products of tissue decomposition); in humans psychogenic factors (such as shame and anger) play a large role. Arterial hyperemia is characterized by dilatation of the arteries in the hyperemized area, elevation of temperature in the area, acceleration of blood flow, and reddening (for example, hyperemia of the face). It is accompanied by intensification of metabolic processes in the tissues and promotes the regeneration of tissues. Hemorrhages may occur during arterial hyperemia if there are pathological changes in the blood vessels. Arterial hyperemia is induced for therapeutic purposes by means of mustard plasters and cupping glasses. Venous (passive, static) hyperemia occurs when the outflow of blood along the veins is obstructed as a result of pressure on the venous wall (cicatrix, tumor, varicose dilatation of the veins, or edema), while the inflow remains unchanged or when there is a weakening of cardiac activity. Venous hyperemia is characterized by deceleration of blood flow to the point of complete stasis. Oxygen deficit develops in the tissues, the vascular walls become more permeable, and edema develops. Prolonged blood stasis and edema may lead to atrophy of the parenchyma of an organ.


References in periodicals archive ?
The authors found that the severity of burning and stinging symptoms were significantly reduced with the enhanced lubricating agent lens, and signs of bulbar conjunctival hyperaemia, ocular surface staining and palpebral conjunctival roughness were significantly reduced with daily disposable lens wear compared to no lens wear.
Previous studies have compared the use of a daily disposable lens to habitual lens wear in patients with allergies during the allergy season--a greater reduction in bulbar and palpebral hyperaemia, corneal staining and lid roughness from baseline was observed with the daily disposable compared to the habitual lenses and 67% of subjects found the daily disposable more comfortable compared to 18% with a new pair of their habitual lenses.
3-1mm in diameter) or giant papillae (>1mm), swelling and hyperaemia on the superior palpebral conjunctiva and may be accompanied by mucous discharge and increased lens movement when in situ.
The results of this investigation suggest that the combination of an appropriate MPS cleaning system and in-eye cleaning drops such as Blink-N-Clean could help to reduce deposits on the surface of silicone hydrogel contact lenses and improve wettability, thus increasing NIBUT and improving the contact lens wearing experience without causing a negative impact, such as corneal staining, hyperaemia and LIPCOF, in the short term.
Much worse Worse Same Better Much better Table 2 Change in conjunctival hyperaemia, LIPCOF and corneal staining from baseline to after 14 days of twice daily use of Blink-N-Clean eye drops Ocular Mean Standard Statistical Assessment Grade Deviation Significance Hyperaemia at 0.
54)) CLGPC Symptoms Signs Treatment Options Stage 1 * Occasional * Normal tarsal * Increase itching after papillae replacement lens removal frequency * Minimal to mild * Minimal mucous conjunctival * Encourage discharge in the hyperaemia strict cleaning morning (rub and rinse) * Some contact and disinfection lens surface deposition * Introduce hydrogen peroxide cleaning and unpreserved saline if unresponsive * Consider changing lens polymer or switching to daily disposable lenses 2 * Itching * Increased size * As for stage 1, of papillae, some but introduce * Increased lens over 0.
What Cornea and Contact Lens Research Unit (CCLRU) grade of Iimbal hyperaemia represents an upper limit for normal eyes?
The most common ADR associated with selective alpha-2 adrenergic agonists (brimonidine) is an ocular allergic reaction consisting of hyperaemia, follicular conjunctivitis and eyelid swelling.
conjunctivitis/episcleritis/scleritis Anti-rheumatics Hydroxychloroquine: visual disturbance (decreased vision, colour vision disturbance), corneal deposition, retinal deposition Indomethacin: keratopathy, retinopathy Sulphasalazine: induced myopia Table 3 ADRs of topical anti-glaucoma medication Drug Adverse reaction Beta-blockers Bronchoconstriction, bradycardia, arrhythmia, syncope, impotence Alpha-adrenergic Allergic reactions (follicular agonists conjunctivitis), bradycardia, hypotension, headaches, fatigue, somnolence Prostaglandin Conjunctival hyperaemia, iris darkening, analogues eyelash changes Carbonic Bitter taste, gastrointestinal anhydrase disturbance, headaches inhibitors
If the patient has persisted with incorrect RGP lens wear for a few days, conjunctival hyperaemia and epithelial erosions may have resulted.
Symptoms: Careful questioning regarding the location and timing of the conjunctival hyperaemia is important.
Signs: Many papillae are noted on the upper tarsal conjunctival area with hyperaemia and oedema of the surface.