tonometry


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Related to tonometry: Applanation Tonometry

tonometry

 [to-nom´ĕ-tre]
measurement of tension or pressure, e.g., intraocular pressure.
digital tonometry estimation of the degree of intraocular pressure by pressure exerted on the eyeball by the finger of the examiner.
gastric tonometry monitoring of the gastric intramucosal pH to obtain early indications of inadequate tissue oxygenation; the sensitive nature of the mucosa allows for monitoring of metabolic changes produced by hypoxia well in advance of the other more common indices of hypoxia.

to·nom·e·try

(tō-nom'ĕ-trē),
1. Measurement of the tension of a part, for example, intravascular tension or blood pressure.
2. Measurement of ocular tension.

tonometry

/to·nom·e·try/ (-ĕ-tre) measurement of tension or pressure, particularly intraocular pressure.
digital tonometry  estimation of the degree of intraocular pressure by pressure exerted on the eyeball by the examiner's finger.

tonometry

[tōnom′ətrē]
the measuring of intraocular pressure by determining the resistance of the eyeball to indentation by an applied force. Several kinds of tonometers are used. The air-puff tonometer, which does not touch the eye, records deflections of the cornea from a puff of pressurized air. The Schiötz impression and the applanation tonometers record the pressure needed to indent or flatten the corneal surface. Applanation tonometry at the slit lamp is considered most accurate. Schiötz tonometry is rarely done today.

tonometry

Blood gases See Blood gas analysis Ophthalmology A technique that measures intraocular pressure–normal is ≤ 20 mm Hg by contact–indentation of, or applanation on or noncontact–by a puff of air on the outer part of the eye Indications Diagnose and manage glaucoma, ocular HTN, and in routine ocular examination.

to·nom·e·try

(tō-nom'ĕ-trē)
1. Measurement of the tension of a part (e.g., intravascular tension or blood pressure).
2. Measurement of ocular tension.

tonometry

(tō-nom′ĕ-trē) [ tono- + -metry]
Enlarge picture
TONOMETRY: Measuring intraocular eye pressure
The measurement of tension of a part, as intraocular tension, used to detect glaucoma. See: illustration

analytical tonometry

A technique formerly used in blood gas analysis in which the liquid blood sample and its gas are held at equilibrium and the partial pressures of oxygen and carbon dioxide are measured.

applanation tonometry

Determining intraocular pressure by measuring the force necessary to flatten the corneal surface.

digital tonometry

Determining intraocular pressure by use of the fingers.

gastric tonometry

Measurement of the partial pressure of carbon dioxide (Pco2) in the stomach of critically ill patients to determine how well the stomach and other internal organs are perfused with blood and oxygen. Poor gastric perfusion is found in more severe conditions, i.e., those that carry an increased risk of death.

noncontact tonometry

Determining intraocular pressure by measuring the degree of indentation of the cornea produced by a puff of air.

tonometry

Measurement of the pressure of the fluid within the eye.

Tonometry

The measurement of pressure.
Mentioned in: Glaucoma

tonometry 

Measurement of intraocular pressure with a tonometer. See intraocular pressure; tonometer.

tonometry

measurement of tension or pressure, e.g. intraocular pressure. See also tonometer.

digital tonometry
estimation of the degree of intraocular pressure by pressure exerted on the eyeball by the finger of the examiner.
References in periodicals archive ?
To date, there are sporadic publications reporting results of aqueous tear production as measured by the Schirmer tear test and the phenol red thread test, (2-11) indirect tonometry, (2,4,5,8,10-18) conjunctival microbial flora, (5,10,19) and ultrasonographic findings (5,14-20-22) in a small number of avian species ranging from large psittacine birds to raptors.
The IOP was measured using applanation tonometry just before and after tracheal intubation and then at every minute for the next five minutes in both eyes.
External examination, confrontation visual field, color vision, refraction, slit lamp, ophthalmoscopy, tonometry, and the comprehensive eye examination are performed on each patient.
Using intramucosal pH measured by gastric mucosal tonometry as a marker for tissue oxygenation, Silverman and Tuma (24) compared the effectiveness of dobutamine administration with the effectiveness of transfusion in increasing this parameter.
The remainder deals with physical examination skills, covering basic optics, subjective refraction, objective refraction, near refraction, motilities and alignment, slit lam biomicroscopy, gonioscopy, tonometry, and ophthalmoscopy.
DENVER -- Home ambulatory peripheral arterial tonometry is an accurate, convenient, and far less costly alternative to polysomnography in the sleep laboratory for diagnosis of obstructive sleep apnea, Donald Townsend, Ph.
Limb volume, dermal tonometry (a measure of skin thickness and elasticity) and upper limb range of motion were measured.
31) However, the variation obtained with the noncontact tonometer was greater than that with the Goldmann applanation tonometer, (32) so that the sensitivity of the study would have been greater had applanation tonometry been used.
The noninvasive test, reactive hyperemia peripheral arterial tonometry (RH-PAT), measures how the volume of a fingertip changes as blood flows through it.
Scientists are testing a new screening tool, called reactive hyperemia peripheral arterial tonometry (RH-PAT), to assess early-stage heart disease.
Common terms include: Ophthalmoscopy - viewing the optic disc with a special torch; Tonometry - measuring the eye pressure; Perimetry - assessing the field of vision.
For tonometry, each laboratory applied two different gas mixtures, which were analyzed with a relative inaccuracy of <2% for [O.