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Biomedical subjects

M Restori

Publications and source records attributed to M Restori.

32 records · Page 2Linked to original sources
PubMed1988

Doppler ultrasound of orbital vessels.

The techniques of doppler ultrasound have been applied to blood vessels within the orbit. The doppler frequency shifts of ultrasonic pulses scattered from blood cells moving within orbital vessels are a measure of velocities rather than the amount of blood flow. The doppler signal from the ophthalmic artery behind the globe is responsive to changes in ocular blood flow. Blood flow can also be detected at the optic nerve head, and from the coats of the eye adjacent to the nerve head. Flow rate in the ophthalmic artery is reduced following retrobulbar anaesthesia. The source of the pulsatile retrograde flow signal which can be detected in some cases of internal carotid stenosis is located in the region of the ophthalmic artery.

Anesthesia, Local↗
PubMed1981

Ultrasound.

The application of ultrasonics has been one of the major developments in ophthalmology in the last two decades. Diagnostic ultrasound of the eye and orbit, together with ocular biometry (especially in the field of lens implantation), are now routine investigations, while ultrasonic surgery of the lens (phacoemulsification) has become a well-established part of our surgical armamentarium. The historical development of diagnostic ultrasound is reviewed, its physical basis is recalled, present-day techniques and instrumentation are outlined, and future possibilities considered.

Anthropometry↗
PubMed1979

Ultrasonic examination in severe diabetic eye disease.

B-scan ultrasound of the posterior segment is reported in 154 patients with severe diabetic eye disease. Epiretinal fibrosis, vitreous haemorrhage, vitreous detachment, and retinal detachment were frequently diagnosed. The ultrasonic findings are discussed in relation to the pathological changes in the vitreous in proliferative diabetic retinopathy.

Adult↗
PubMed1979

Ultrasound in orbital diagnosis.

Ultrasound is a safe and useful method of detecting, localizing, and differentially diagnosing orbital lesions. Diagnosis using B-scan and C-scan techniques depends on the qualitative recognition of patterns based on the location and shape of a lesion together with the distribution in number and amplitude of echoes arising from within a lesion. In addition, the sound-attenuating properties of a lesion, determined by changes in the appearance of deeper structures, may aid in identification.

Diagnosis, Differential↗
PubMed1978

Ultrasonic examination of the traumatized eye.

Ultrasonic examination may be used to assess ocular damage if the media are opaque after blunt or penetrating injury. In eyes with retained foreign material, ultrasound may also be used to aid localization of the foreign body.

Eye Foreign Bodies↗
PubMed1977

C-scan ultrasonography in orbital diagnosis.

A C-scan imaging facility has recently been added to the ultrasonic system in use at Moorfields Eye Hospital, London. The technique is explained and typical C-scans are presented to demonstrate the normal orbital fat and optic nerve, together with selected pathological conditions in the orbit. The C-scan facility permits imaging of the orbital contents in the coronal plane. This coronal plane imaging, together with high resolution and sensitivity, makes this a useful technique for demonstrating orbital lesions and it is hoped helps in the accurate measurement of the diameters of the optic nerve along its length. The problems associated with C-scanning are discussed.

Adipose Tissue↗
PubMed1977

Comparison of ultrasonic and photographic methods of axial length measurements of the eye.

The axial length of 25 eyes was measured by the photographic method and by ultrasonography. The photographic measurements were consistently larger than the ultrasonic, but analysis gave a correlation coefficient of r = 0-8483. The results suggest that the centre of rotation of the eye lies posterior to the anatomical centre of the globe. Using an empirical method of calculation and allowing for an error of +/-0-3 mm in the ultrasonic measurement, the photographic results were within +/-0-5 mm in 13 eyes and +/-1-0 mm in 7 eyes. The photographic method may be helpful as a guide to the power of intraocular lens implants and for comparing axial lengths in population studies.

Anthropometry↗
PubMed1977

Rapid B-scanning of the vitreous.

Ultrasonic examination is an essential investigation in most patients awaiting vitrectomy. Rapid B-scanning of the vitreous is described utilising a new system capable of high resolution and good tonal quality. Several patterns of haemorrhagic invasion of the vitreous cavity are illustrated, together with detachment, collapse, and retraction of the vitreous gel.

Eye Diseases↗
PubMed1977

Ultrasound in pre-vitrectomy assessment.

Ultrasonic examination helps the surgeon to select patients for vitrectomy and enables him to plan the operative procedure. A film demonstrated the advantages of rapid B-scanning over other ultrasonic techniques of previtrectomy assessment.

Eye Diseases↗
PubMedDate not supplied

"Real-time" immersion B-scan and C-scan techniques in ophthalmic diagnosis.

The advent of new techniques in vitreous surgery has added an impetus to improve ultrasonic examination of the vitreous cavity. Rapid B-scanning is vital in the diagnosis of vitreo-retinal pathology when opacity prevents biomicroscopical examination. Serial B- and C-scan sectioning have also proved essential in the study of tumours. The C-scan is of particular value in the study of traction retinal detachments and tumours.

Choroid↗