Copy of `Dorland's Medical Dictionary`

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Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

IPPB
intermittent positive pressure breathing.

ipratropium
(ip″rә-tro´pe-әm) an anticholinergic and antimuscarinic, used in the form of the bromide salt as an aerosol bronchodilator in treatment of bronchospasm and as a nasal spray for the relief of rhinorrhea.

iproplatin
(i´pro-plat″in) an analogue of cisplatin, used as an antioneoplastic agent, administered intravenously; its actions are similar to those of cisplatin but its toxicities are different and usually milder.

ipsilateral
(ip″sĭ-lat´әr-әl) situated on or affecting the same side.

IPV
poliovirus vaccine inactivated.

IQ
intelligence quotient.

Ir
iridium.

Ir genes
immune response genes.

irbesartan
(ur″bә-sahr´tan) an angiotensin II receptor antagonist used as an antihypertensive, administered orally.

iridal
(i´rĭ-dәl) pertaining to the iris.

iridalgia
(i″rĭ-dal´jә) pain in the iris.

iridauxesis
(ir″id-awk-se´sis) thickening of the iris.

iridectomesodialysis
(ir″ĭ-dek″to-me″so-di-al´ә-sis) surgical formation of an artificial iris by excision and separation of adhesions around the inner edge of the iris.

iridectomy
(ir″ĭ-dek´tә-me) excision of a full-thickness piece of the iris.

iridectropium
(ir″ĭ-dek-tro´pe-әm) eversion of the iris.

iridemia
(ir″ĭ-de´me-ә) hemorrhage from the iris.

iridencleisis
(ir″ĭ-dәn-kli´sis) surgical incarceration of a slip of the iris within a corneal or limbal incision to act as a wick for aqueous drainage in glaucoma.

irideremia
(ir″ĭ-dә-re´me-ә) congenital absence of the iris.

irides
(i´rĭ-dēz) (ir´ĭ-dēz) plural of iris.

iridescence
(ir″ĭ-des´әns) the condition of gleaming with bright and changing colors. adj., irides´cent., adj.

iridescent virus
iridovirus.

iridesis
(i-rid´ә-sis) repositioning of the pupil by fixation of a sector of iris in a corneal or limbal incision.

iridic
(i-rid´ik) pertaining to the iris.

iridic muscles
those controlling the iris.

iridium
(Ir) (ĭ-rid´e-әm) a chemical element, atomic number 77, atomic weight 192.2.

iridoavulsion
(ir″ĭ-do-ә-vul´shәn) complete tearing away of the iris from its periphery.

iridocapsulitis
(ir″ĭ-do-kap-su-li´tis) inflammation of the iris and lens capsule.

iridocele
(i-rid´o-sēl) hernial protrusion of part of the iris through the cornea.

iridochoroiditis
(ir″ĭ-do-ko″roi-di´tis) inflammation of the iris and choroid.

iridocoloboma
(ir″ĭ-do-kol″o-bo´mә) congenital fissure or coloboma of the iris.

iridoconstrictor
(ir″ĭ-do-kәn-strik´tәr) a muscle or agent that constricts the pupil of the eye.

iridocorneal angle
a narrow recess between the sclerocorneal junction and the attached margin of the iris, marking the periphery of the anterior chamber of the eye; it is the principal exit site for the aqueous humor.

iridocyclectomy
(ir″ĭ-do-sә-klek´tә-me) excision of part of the iris and of the ciliary body.

iridocyclitis
(ir″ĭ-do-sә-kli´tis) inflammation of the iris and ciliary body. heterochromic iridocyclitis a unilateral low-grade form leading to depigmentation of the iris of the affected eye; called also heterochromic uveitis.

iridocyclochoroiditis
(ir″ĭ-do-si″klo-ko″roi-di´tis) inflammation of the iris, ciliary body, and choroid.

iridocystectomy
(ir″ĭ-do-sis-tek´tә-me) excision of part of the iris to form an artificial pupil.

iridodesis
(ir″ĭ-dod´ә-sis) iredesis.

iridodialysis
(ir″ĭ-do-di-al´ә-sis) separation or loosening of the iris from its root at the ciliary body, either from trauma or from surgical accident.

iridodilator
(ir″ĭ-do-di´la-tәr) (-di-la´tәr) a muscle or agent that dilates the pupil of the eye.

iridodonesis
(ir″ĭ-do-do-ne´sis) tremulousness of the iris on movement of the eye, occurring in subluxation of the lens.

iridokeratitis
(ir″ĭ-do-ker″ә-ti´tis) inflammation of the iris and cornea.

iridokinesia
(ir″ĭ-do-kĭ-ne´zhә) iridokinesis.

iridokinesis
(ir″ĭ-do-kĭ-ne´sis) contraction and expansion of the iris. adj., iridokinet´ic., adj.

iridoleptynsis
(ir″ĭ-do-lәp-tin´sis) thinning or atrophy of the iris.

iridology
(ir″ĭ-dol´ә-je) the study of the iris as associated with disease.

iridomalacia
(ir″ĭ-do-mә-la´shә) softening of the iris.

iridomesodialysis
(ir″ĭ-do-me″so-di-al´ә-sis) surgical loosening of adhesions around the inner edge of the iris.

iridomotor
(ir″ĭ-do-mo´tәr) pertaining to movements of the iris.

iridoncus
(ir″ĭ-dong´kәs) tumor or swelling of the iris.

iridoparalysis
(ir″ĭ-do-pә-ral´ә-sis) iridoplegia.

iridoperiphakitis
(ir″ĭ-do-per″e-fa-ki´tis) inflammation of the lens capsule.

iridoplegia
(ir″ĭ-do-ple´jә) paralysis of the sphincter of the iris, with lack of contraction or dilation of the pupil; called also iridoparalysis.

iridoptosis
(ir″ĭ-dop-to´sis) (ir″ĭ-do-to´sis) prolapse of the iris.

iridopupillary
(ir″ĭ-do-pu´pĭ-lar″e) pertaining to the iris and pupil.

iridorhexis
(ir″ĭ-do-rek´sis) rupture of the iris. the tearing away of the iris.

iridoschisis
(ir″ĭ-dos´kĭ-sis) splitting of the mesodermal stroma of the iris into two layers, with fibrils of the anterior layer floating in the aqueous.

iridosclerotomy
(ir″ĭ-do-skle-rot´ә-me) incision of the sclera and of the edge of the iris in glaucoma.

iridosteresis
(ir″ĭ-do-stә-re´sis) removal of all or part of the iris.

iridotasis
(ir″ĭ-dot´ә-sis) stretching of the iris in treatment of glaucoma.

iridotomy
(ir″ĭ-dot´ә-me) incision of the iris.

iridovirus
(ir″ĭ-do-vi´rәs) any virus belonging to the family Iridoviridae.

irinotecan
(i″rĭ-no-te´kan) an antineoplastic agent used as the hydrochloride salt in treatment of colorectal carcinoma.

iris
(i´ris) pl. i´rides the circular colored membrane behind the cornea, perforated by the pupil. It is made up of a flat bar of circular muscular fibers that surround the pupil, a thin layer of plain muscle fibers that dilate the pupil, and, on the side toward the interior of the eye, two layers of pigmented cells.

iris contraction reflex
pupillary reflex.

iritis
(I-ri´tis) inflammation of the iris; it may be acute, occurring suddenly with pronounced symptoms, or chronic, with less severe but longer-lasting symptoms. Characteristics include swelling and discoloration of the iris; severe pain that radiates to the forehead; redness of the eye; contraction or irregular shape ...

iritoectomy
(ir″ĭ-to-ek´tә-me) surgical excision of deposits of after-cataract on the iris, together with iridectomy, to form an artificial pupil.

iritomy
(i-rit´ә-me) iridotomy.

iron
(Fe) (i´әrn) a chemical element, atomic number 26, atomic weight 55.847. Iron is chiefly important to the human body because it is the main constituent of hemoglobin, cytochrome, and other components of respiratory enzyme systems. iron 59 a radioisotope ...

iron deficiency
deficiency of iron in the system, as from blood loss, low dietary iron, or a disease condition that inhibits iron uptake; this can cause serious disorders. The amount of new iron needed every day by an adult is about 18 mg, and children need more in proportion to weight. When iron stores are low or absent, a person will d...

iron deficiency anemia
a type of hypochromic microcytic anemia that occurs when there are greater demands on stored iron than the person's body can meet, usually because of chronic blood loss, dietary deficiency, or defective absorption. Symptoms include pallor, lesions around the mouth, gastrointestinal complaints, retinal hemorrhages, and thin, bri...

iron lung
popular name for Drinker respirator.

iron poisoning
poisoning from ingestion of excessive iron or iron-containing compounds, such as in children who eat iron supplement tablets like candy; symptoms include ulceration of the gastrointestinal tract, vomiting, dilation of blood vessels, shock, metabolic acidosis, liver injury, and coagulation disturbances.

iron storage disease
hemochromatosis.

iron-sulfur protein
a group of proteins, including ferredoxins and adrenodoxin, that function in electron transport; they contain iron-sulfur centers of the form Fe2S2Cys4 or Fe4S4Cys4, where Cys denotes a cysteine residue; the iron atoms undergo reversible transitions between the +2 and +3 oxidation states.

irotomy
(i-rot´o-me) iridotomy.

irradiate
(ĭ-ra´de-āt) to treat with radiant energy.

irradiation
(ĭ-ra″de-a´shәn) radiation therapy. the dispersion of nervous impulse beyond the normal path of conduction. the exposure of a substance to radiation, which consists of any of numerous kinds of rays that travel at the speed of light. Every living thing is subject to irradiation ...

irreducible
(ir″e-dldbomacs´ĭ-bәl) not susceptible to reduction, as a fracture, hernia, or chemical substance.

irreducible hernia
incarcerated hernia.

irregular astigmatism
that in which the curvature varies in different parts of the same meridian or in which refraction in successive meridians differs irregularly.

irregular bone
a bone that is not easily classified as long, short, or flat. Examples include the skull, hip bones, and vertebrae.

irresistible impulse
an impulse to commit a criminal act that cannot be resisted because mental disease has destroyed the person's freedom of will and power to choose between right and wrong.

irreversible coma
brain death.

irrigation
(ir″ĭ-ga´shәn) washing of a body cavity or wound by a stream of water or other fluid. a liquid used for such washing.

irritability
(ir″ĭ-tә-bil´ĭ-te) ability of an organism or a specific tissue to react to the environment. the state of being abnormally responsive to slight stimuli, or unduly sensitive. myotatic irritability the ability of a muscle to contract in response to stretch...

irritable
(ir´ĭ-tә-bәl) capable of reacting to a stimulus. abnormally sensitive to stimuli.

irritable bladder
a state of the bladder marked by increased frequency of contraction with associated desire to urinate.

irritable bowel syndrome
the most common disorder seen in patients with gastrointestinal complaints, consisting of altered bowel habits, such as diarrhea or constipation or alternation of the two, along with abdominal pain and intolerance to flatus, without any detectable organic disease. It should not be confused with colitis or other inflammatory diseases...

irritable colon
old name for irritable bowel syndrome.

irritant
(ir´ĭ-tәnt) causing irritation. an agent that causes irritation.

irritant dermatitis
a nonallergic type of contact dermatitis due to exposure to a substance that damages the skin rather than acting as a sensitizer or allergen.

irritation
(ir″ĭ-ta´shәn) the act of stimulating. a state of overexcitation and undue sensitivity. adj., ir´ritative., adj.

Irukandji syndrome
(ir″u-kan´je) a clinical syndrome observed in Queensland, Australia, due to stinging by the jellyfish Carukia barnesi; symptoms include initial neuromuscular paralysis that can be fatal, and in survivors systemic symptoms with pulmonary edema and skin ulcers at the site of infection.

IRV
inspiratory reserve volume.

Irving operation
Irving technique a method of tubal ligation in which the uterine tubes are ligated and cut and the proximal ends are sewn into the myometrium.

Is genes
immune suppressor genes.

Isaacs syndrome
(i´zәks) Isaacs-Mertens syndrome progressive muscle stiffness and spasms, with continuous muscle fiber activity similar to that seen with neuromyotonia.

ischemia
(is-ke´me-ә) deficiency of blood in a part, due to functional constriction or actual obstruction of a blood vessel. cerebral ischemia cerebral infarction. myocardial ischemia deficiency of blood supply to the myocardium (heart muscle).

ischemia time
the total time between traumatic amputation of a limb or portion of a limb and its surgical reimplantation; it is the sum of warm and cold ischemia times.

ischemic
(is-kem´ik) pertaining to or characterized by ischemia.