Ophthalmodynamometry in Carotid Artery Disease

Russell, Richard A.; Cranston, W. I.

doi:10.1136/jnnp.24.3.281

Cited by 29 publications

(4 citation statements)

References 13 publications

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“…It is well known that any upward deviation of the head from the horizontal plane reduces cerebral blood flow and perfusion pressure [13,14]. Furthermore, it has been shown that compression of the carotid artery, even when transient, causes an immediate decrease of the ophthalmic artery pressure that can last for several days [15][16][17].…”

Section: Discussionmentioning

confidence: 99%

The ophthalmic blood pressure in thyroidectomized patients

Cardan¹,

Pop²

1979

World j. surg.

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A parallel investigation of the blood pressure changes in the brachial and ophthalmic arteries was carried out in a group of 23 patients following subtotal thyroidectomy, and the results were compared with those obtained in a control group of 21 patients operated on for other diseases. A pronounced decrease of the pressure in the ophthalmic artery was found in the thyroidectomized patients. It appeared immediately after surgery, lasted 2 or 3 days, and disappeared spontaneously. The pressure decrease might be correlated with the headache that is frequently encountered in patients after thyroidectomy and that occurred in 17 of the 23 thyroidectomized patients. Changes in carotid blood flow due to the patient's position on the operating table, removal of the thyroid tissue, and liberation of bradykinin are discussed as possible factors that might explain this finding.

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Section: Discussionmentioning

confidence: 99%

The ophthalmic blood pressure in thyroidectomized patients

Cardan¹,

Pop²

1979

World j. surg.

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“…Thus ophthalmodynamometry, though simple, has been shown to be inaccurate and unreliable (Hollenhorst, 1959;Lowe and Stephens, 1961 ;Ross Russell and Cranston, 1961). Arteriography, though anatomically accurate, is time-consuming and is occasionally attended by serious risks to the patient (Bull, Marshall, and Shaw, 1960).…”

Section: Discussionmentioning

confidence: 99%

Carotid compression tonography: a new test for carotid insufficiency.

Percival¹,

Ridgway²

1968

BMJ

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Wessely (1908) showed that occlusion of one common carotid artery caused an ipsilateral fall of intraocular pressure. Recently ocular tonography during common carotid compression has been used to assess blood flow to the brain in cases suspected of carotid insufficiency (Barrios and Solis, 1966;McLean and Galin, 1966). The purpose of this paper is to demonstrate that carotid compression tonography is a reliable screening test for carotid insufficiency. Material and MethodForty-two patients were referred for exclusion, confirmation, or diagnosis of carotid insufficiency. Each patient lay flat with neck exposed and eyes fixed on a dim light above his head. A drop of local anaesthetic was instilled into each conjunctival sac. The intraocular pressure was measured graphically with a self-recording electronic tonometer placed on one eye. The ipsilateral common carotid artery was compressed with a thumb for one to two seconds, low in the neck to minimize the risk of stimulating the carotid sinus. When the recording of intraocular pressure had returned to normal the contralateral common carotid was compressed. The same procedure was repeated with the tonometer placed on the other eye. Interpretation of ResponseNormal Response (Fig. 1 (Fig. 2); the absence of a crossover fall suggests supply from the basilar artery. A reduced response to ipsilateral compression, which may also be delayed in onset and slow to recover, suggests a degree of carotid insufficiency. A crossover fall has the same significance as before except that its absence may be due to the presence of ipsilateral external carotid collaterals.In unilateral disease the responses from the other eye are normal. If these are abnormal, bilateral disease is indicated, and the nature of the crossover responses provides evidence of the type of collateral circulation (Fig. 3). ResultsOut of 42 recordings 35 were judged satisfactory and seven poor, the latter because of an irregular resting tracing or blepharospasm or movement during carotid pressure; these were discarded. The clinical presentation and results of carotid compression tonography in the 35 former patients are summarized in Tables I and II

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“…[2][3][4][5] It has been suggested that ocular hemodynamics might be better evaluated using a sensitive instrument to amplify the ocular pulse seen during tonometry and tonography.6 With this principle in mind, the following apparatus was developed in the ophthalmic laboratories of University Hospitals.…”

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confidence: 99%

Ocular Oscillometry in Cerebrovascular Disease

Lester¹

1966

Archives of Ophthalmology

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Ophthalmodynamometry in Carotid Artery Disease

Cited by 29 publications

References 13 publications

The ophthalmic blood pressure in thyroidectomized patients

The ophthalmic blood pressure in thyroidectomized patients

Carotid compression tonography: a new test for carotid insufficiency.

Ocular Oscillometry in Cerebrovascular Disease

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