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Biomedical subjects

E L Kier

Publications and source records attributed to E L Kier.

15 recordsLinked to original sources
PubMed1985

Intraventricular hemorrhage in a term neonate secondary to a third ventricular AVM. Case report.

An initially healthy infant born of an uncomplicated full-term gestation was brought for evaluation of the acute onset of vomiting, irritability, lethargy, and opisthotonus at 14 days of age. Computerized tomography demonstrated an intraventricular hemorrhage. Arteriography defined an angioma on the roof of the third ventricle which was successfully removed via the transcallosal interfornicial approach on the 34th day of life. Other than an easily controlled seizure disorder, the postoperative course was uneventful. At 8 months of age the child is developing normally. Arteriovenous malformations should be considered in the differential diagnosis of intraventricular hemorrhage in full-term neonates without predisposing trauma or bleeding diathesis. High-speed digital subtraction arteriography may be used to screen for this diagnosis. The transcallosal interfornicial exposure offers a satisfactory approach for excising third ventricular angiomas in young infants.

Cerebral Hemorrhage↗
PubMed1979

Subarachnoid spread of ependymoma: diagnosis and evaluation of therapy by computerized tomography.

The potential of ependymomas to spread throughout the intracranial subarachnoid space is well documented, though the incidence is disputed. This relates in part to the time required for such metastases to produce symptoms. The diagnosis of such spread, however, is important for therapeutic management. This report demonstrates the effectiveness of computerized tomography in diagnosing spread of ependymoma throughout the basal cisterns and cerebral fissures.

Adult↗
PubMed1978

Multiplanar reconstruction as an aid in CT diagnosis.

Multiplanar reconstructions of the orbit, brain, and spine were performed on 60 patients with a variety of disorders. They were thought to provide significant useful information in 22 cases, some useful information in 26 cases, and no useful information in 12 cases. It is suggested that on-line reconstruction is a useful adjunct to neurologic CT.

Brain↗
PubMed1978

The role of computed tomography in the evaluation of upper cervical spine pathology.

A series of nine patients with symptoms referable to the upper cervical spine were recently studied by both conventional radiographic techniques and computed axial tomography (CT), in an attempt to ascertain the effectiveness of CT in evaluating upper cervical spine pathology. We found CT a useful tool in diagnosing a variety of pathological conditions in this region, particularly when they involve subtle neural arch fractures, rotational deformities, or compromise of the neural canal.

Adult↗
PubMed1977

Polarized projection of stereo cerebral angiograms for audience viewing.

A simple and inexpensive method for producing stereo angiographic images for projection to large audiences is presented. Two 35 mm images are produced using a conventional reflex camera and direct positive film. When properly taken, these film chips can be mounted in stereo mounts and projected using a polarized light stereo projector.

Cerebral Angiography↗
PubMed1976

The radiology of transsphenoidal hypophysectomy: a review of 100 cases.

This report describing the radiology of transsphenoidal hypophysectomy based on a review of 100 consecutive surgical procedures. Preoperative laminographic evaluation of the sphenoid sinus is an important aid in planning the most direct surgical approach to the pituitary. It is also useful in defining the many anatomic structures that may be injured inadvertently at the time of surgery. Intraoperative radiography or fluoroscopy is helpful in identifying the sella floor and as an aid in preventing loss of orientation within a capacious sinus. Various changes occur within the sphenoid sinus following surgery, some transient and others persistent. The surgical defect is usually difficult to identify on routine roentgenograms but is clearly visible on lateral laminography. A persistent soft tissue mass within the sinus is usually a manifestation of fascia and fat placed as a seal within the sinus.

Humans↗
PubMed1975

Preoperative laminagraphic evaluation of the sphenoid sinus for transsphenoidal surgery.

In recent years the transethmoidal and transnasal approaches to the pituitary gland have become increasingly popular. In each case, detailed preoperative analysis of the anatomy of the sphenoid sinus and its boundaries is crucial in facilitating entry to the pituitary fossa and in reducing intraoperative complications. Certain operative difficulties and complications are the result of the marked variability in the anatomy of the sphenoid bone and its sinus. These include: loss of orientation within a capacious sinus; perforation of the carotid artery or cavernous sinus; injury to the optic nerve or ophthalmic artery; and violation of the subarachnoid space with resultant pneumocephalus or cerebrospinal fluid rhinorrhea. Pneumatization develops originally within the presphenoid, beginning anteriorly and proceeding posteriorly. Around the time of puberty the pneumatization usually penetrates up to the spheno-occipital synchondrosis. Dense bony septa remain within the sinus along the plane of fusion of the various sphenoidal segments. Preoperative laminagraphy of these ridges and septa is extremely helpful in planning the safest and most direct route to the sella. Laminagraphy is preferable to routine skull films because the septal detail is unobscured by overlying facial structures. Pleuridirectional laminagraphic motion (circular or hypocycloidal) is preferred to linear motion because of the clarity and detail that they provide.

Humans↗
PubMedDate not supplied

Microangiographic anatomy of the cat's eye.

The microangiographic anatomy of the cat's eye is presented. The characteristic vascular pattern of each of the three distinct circulations, retinal choroidal, and ciliary is described and illustrated.

Angiography↗
PubMedDate not supplied

Hemifacial spasm caused by a tortuous vertebral artery: MR demonstration.

Hemifacial spasm is a symptom complex comprising involuntary, painless spasms of the orbicularis muscle that may progress to involve all facial muscles. It is frequently the result of compression of the facial nerve at its root exit zone from the brain stem by vascular loops or aneurysms of the posterior inferior cerebellar artery, anterior inferior cerebellar artery, vertebral artery, or cochlear artery. Coronal and axial T1-weighted images clearly depict the course of the facial nerve from the brain stem to the internal auditory canal and its relation to the vertebrobasilar system. This case demonstrates the magnetic resonance appearance of a tortuous vertebral artery and its relationship to the facial nerve in a patient with long standing hemifacial spasm.

Aged↗
PubMedDate not supplied

Preparation technique and new contrast medium for radiography of biologic specimens.

An easily prepared contrast medium for radiography of vascular and ventricular systems is described. The accompanying fixation methods are discussed. Utilizing a few, readily available components and chemicals, technologists should be able to easily prepare a contrast medium that will produce, both before and after preservative tissue fixation, a quality specimen for radiography. The methods are easily applicable to most biological specimens.

Contrast Media↗