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Biomedical subjects

E L Kier

Publications and source records attributed to E L Kier.

At least 37 records · Page 2Linked to original sources
PubMed1982

Computed tomographic anatomy of the temporal bone.

With the recent development of high-resolution computed tomography (CT), there is a growing need to explore the full potential of this new method in demonstrating the detailed anatomy of the temporal bone. For this purpose, dry skulls with intact ossicles were scanned in axial and coronal projections. The detailed CT anatomy of the temporal bone was documented, complemented by images from live patients. Because of its superior contrast resolution, CT was able to demonstrate numerous structures, such as the tympanic membrane, ossicles, and supporting structures, hitherto never or poorly visualized by any other method. In addition, the ease by which axial sections of the temporal bone could be obtained is of great benefit in displaying several structures previously difficult to evaluate.

Adult↗
PubMed1980

Use of selective arteriography in the treatment of epistaxis.

Selective carotid arteriography can provide useful information in patients with massive epistaxis. It is limited in application because special techniques and preparation are necessary. Careful selection of patients is mandatory. It is not appropriate as a screening procedure for all patients with epistaxis. The procedure is especially useful when previous surgical control of the bleeding site has failed. Residual branches of the internal maxillary and ethmoid arteries are readily identified. The development of collateral blood flow to the nasal area from many sources can be recognized. The complexity of collateral blood flow emphasizes the necessity for controlling hemorrhage as close to the source as possible. At the same time, it suggests that long-term control of bleeding in the nasal area may fail due to this vast network of vessels.

Adolescent↗
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↗