Special radiological techniques in maxillary sinus disease.
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Angiography↗
Biomedical subjects
R C Holgate
Publications and source records attributed to R C Holgate.
Cranial computed tomography: An evaluation of cost effectiveness.
The impact of cranial computed tomography (CCT) on the cost effectiveness of a neurodiagnostic work-up was evaluated. With the use of CCT, 170 air studies and 171 angiographic procedures were made unnecessary in the 444 patients reviewed. Admission was not necessary in 58% of the outpatients examined and the hospital stay was shortened significantly for inpatients. Even considering the cost of the examination and the few extra investigations generated, a single CCT unit can effect savings of up to $2,000,000 per year.
Cerebral Angiography↗
The relationship of rectus muscles to the globe: a study with coronal CT scanning.
Coronal computerized tomographic scans of 25 patients were reviewed in order to determine the normal relationship of rectus muscles to the globe. Using a horizontal reference line constructed along the anterior cranial fossa, the mean horizontal rectus muscle axis was found to be slightly excyclotorted in both eyes, and the mean vertical rectus muscle axis slightly incyclotorted in both eyes. In addition, the mean superior temporal quadrant angle formed by the intersection of the horizontal and vertical rectus muscle axis was significantly greater than the mean superior nasal quadrant angle in the same eye. The presence of large anatomical variations in individual patients may make it difficult to implicate rectus muscle malposition as an important etiology of A- and V-pattern strabismus.
Eye↗
Intracranial angioplasty for treatment of vasospasm after subarachnoid hemorrhage: technique and modifications to improve branch access.
Angioplasty of the proximal portions of major cerebral arteries at the base of the brain has shown promise as a therapy for symptomatic vasospasm after subarachnoid hemorrhage. The blind-ended, single-lumen balloon-dilatation catheter most widely used to date lacks steerability, limiting its application to unbranched stems and single branches at bi- or trifurcation points. To extend the capabilities of cerebral angioplasty, we describe two modifications of the basic technique that have allowed increased selectivity and successful angioplasty of multiple branches, both proximal and distal, involved by vasospasm. Of four patients treated, three showed early improvement in their clinical condition, likely attributable to the angioplasty procedure. Our modifications to the basic angioplasty technique enhanced its success. Further refinement of this technique in the treatment of vasospasm will make it safer in treating this serious and widespread disorder.
Angioplasty, Balloon↗