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Biomedical subjects

A B Dublin

Publications and source records attributed to A B Dublin.

48 records · Page 3Linked to original sources
PubMed1976

Fracture of the sella turcica.

Fracture involving the sella turcica is a rare complication of head trauma, but extremely important due to its strategic location adjacent to vital vascular and nervous structures. Of 14 cases reviewed, nine had at least one cranial nerve paralysis, with endocrine abnormalities and cerebrospinal fluid otorrhea seen to a lesser degree. The radiographic findings of sphenoid sinus fluid (13 of 14 cases), pneumocephalus, and unusual vascular occlusions are discussed.

Adolescent↗
PubMed1976

Failure of computerized axial tomography to demonstrate a chronic subdural hematoma.

A chronic subdural hematoma may present in a computerized axial tomography (CAT) scan with the same density as normal brain tissue. The presence of a lesion may be suggested only by its mass effect. The lack of contrast enhancement or edema may help to differentiate a chronic subdural hematoma for a neoplasm or a cerebrovascular accident.

Aged↗
PubMedDate not supplied

Assessment of cerebral blood flow in man by video dilution technique: a preliminary report.

Video dilution technique (VDT) is currently performed in conjunction with routine cerebral angiography to determine carotid blood flow in humans. Preliminary results indicate that the blood flows (as a percentage of cardial output) of the common, internal, and external carotid arteries are 8.5%, 5.5%, and 3.0%, respectively (SD less than 1%). In contradistinction to previous techniques, VDT provides a safe and highly accurate method of determining carotid blood flow in human subjects. The usefulness of this technique in normal and pathologic states is discussed.

Brain↗
PubMedDate not supplied

Carotid blood flow response to Conray-60: diagnostic implications.

The vasoactive effect of the angiographic contrast medium Conray-60 (iothalamate meglumine 60%) on carotid blood flow was studied by the video dilution technique in 26 subjects during routine neuroangiography. After a test series of 1 ml injections of contrast material into the carotid arteries at designated time intervals, an increase in carotid blood flow was found in normal controls at 30 sec, while a significant decrease in flow was observed in patients with atheromatous disease and avascular intracranial masses (p less than 0.01). Test responses in patients with intracranial aneurysm, neoplasm, and granulomatous vasculitis are also reported. The differential effect of contrast material on the cerebral circulation correlates well with several pathologic states of the central nervous system and may be used as a simple test to diagnose and evaluate a variety of vascular disorders.

Adolescent↗
PubMedDate not supplied

Carotid blood flow in man determined by video dilution technique: 1. Theory, procedure, and normal values.

The blood flows in the common, internal, and external carotid arteries were determined as a percentage of the cardiac output by video dilution technique in 20 normal subjects during routine angiography. Nine women and 11 men, ages 19-63 years, displayed a mean flow in the common carotid of 8.5% (SD +/- 0.9%; n = 40); internal carotid, 5.3% (SD +/- 1.0%; n = 24); and external carotid, 3.2% (SD +/- 0.4%; n = 24). Relative flow is calculated by a modification of the Stewart-Hamilton principle. The technique is fast, simple, highly accurate, and avoids the errors connected with previous videodensitometric mean transit time techniques. The method can be used in routine angiography without prolonging the catheterization procedure or adding to the patient's risk or cost.

Adult↗
PubMedDate not supplied

Carotid blood flow in man determined by video dilution technique: II. Vascular abnormalities.

Carotid blood flows were evaluated in 31 individuals with vascular abnormalities using the video dilution technique. In patients with stenoses, angiographically estimated at 70%, blood flow was usually, but not always, measured less than normal. The technique proved to be useful in the evaluation of the efficiency of collateral arterial pathways and in the evaluation of superficial temporal-middle cerebral arterial bypass grafts. It was also helpful in estimating contralateral increase in arterial flows with cross compression techniques for the preoperative evaluation of patients subjected to carotid sacrifice. In a limited number of patients video dilution flows correlated with the degree or proximal arterial spasm and were useful in the preoperative study of these patients. The demonstration of flow abnormalities in patient with seizure disorders may be useful in the medical and surgical management of these individuals.

Adult↗