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Tonometry

Measurement of the pressure or tension of liquids or gases with a tonometer. It has been developed to measure pressure in the eye; the blood vessels; and the stomach.

PubMed Health Glossary
(Source: NIH - National Library of Medicine)

About Tonometry

Tonometry: Eyes

This test helps to detect glaucoma by measuring eye pressure. Your eye care professional may direct a quick puff of air onto the eye, or gently apply a pressure-sensitive tip near or against the eye. Numbing drops may be applied to your eye for this test. Elevated pressure is a possible sign of glaucoma. NIH - National Eye Institute

What works? Research summarized

Evidence reviews

Measurement accuracy of non-invasively obtained central blood pressure by applanation tonometry: a systematic review and meta-analysis

BACKGROUND AND OBJECTIVES: Non-invasive methods based on applanation tonometry have been proposed to estimate central blood pressure. However, the accuracy of these methods hasn't been systematically examined.

Diagnosis of obstructive sleep apnea by peripheral arterial tonometry: meta-analysis

IMPORTANCE: Efficient diagnosis and early treatment of obstructive sleep apnea may help prevent the development of related morbidity and mortality. Compared with polysomnography (PSG), ambulatory sleep study devices offer the possibility of an accurate diagnosis with convenience and low cost.

Sacral nerve stimulation in faecal incontinence associated with an anal sphincter lesion: a systematic review

AIM: The long-term results of sphincteroplasty for faecal incontinence due to an anal sphincter lesion have been disappointing. Initially sacral nerve stimulation was used only in faecal incontinence of neurogenic origin but subsequently the indications have been extended to other conditions. The aim of this review was to evaluate sacral nerve stimulation for incontinence in the presence of a sphincter defect.

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Summaries for consumers

What kinds of eye examinations are there?

Eye examinations may be necessary for various reasons, for instance due to external eye injuries or sudden vision problems. Vision also tends to get worse with age, so many people end up going to see an eye doctor at some point.

Still awaiting evidence for sphincterotomy for biliary sphincter of Oddi dysfunction

Sphincterotomy for biliary sphincter of Oddi dysfunction in patients with a manometrically documented high basal pressure looks attractive, but should not be offered outside new randomised clinical trials.

Non surgical therapy for anal fissure.

Anal fissure is a painful ulcer usually occurring in the posterior midline of the skin just outside the entry to the rectum. Its persistence is due to spasm of the internal sphincter muscle. The typical pain of this condition is pain on moving one's bowels that persists for some time afterward. Relief with healing of chronic fissures until very recently has been achieved by surgical procedures aimed at ablation of the sphincter spasm. Because of the risk of incontinence resulting from surgery, medical alternatives for surgery have been sought. Among the older medications, bran is effective in preventing recurrence of acute fissure. Local application of muscle relaxing therapy is effective in healing chronic anal fissure, though not as well as surgery, and with considerable risk of adverse events during therapy. There is a Cochrane review related to this review dealing only with surgical procedures.

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More about Tonometry

Photo of a young adult

Other terms to know:
Glaucoma, Intraocular Pressure (IOP)

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