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Biomedical subjects

A A Waitzman

Publications and source records attributed to A A Waitzman.

7 recordsLinked to original sources
PubMed1996

Endovascular management of vertebral arteriovenous fistulas: the Toronto experience.

OBJECTIVE: This study was designed to evaluate the effectiveness of the endovascular management under angiographic control of vertebral arteriovenous fistulas (AVF). DESIGN: The study included a retrospective chart review. METHOD: Of the eight patients with AVF (2 traumatic, 6 spontaneous) referred to the interventional neuroradiology group at the Toronto Hospital between May 1986 and August 1994, endovascular embolization was attempted in six cases. RESULTS: All cases were successful, with no residual fistula flow, mortality, or morbidity. CONCLUSIONS: Vertebral AVFs are rare; therefore, most centres have had limited experience with their management. Endovascular management has proven to be less difficult and to have less morbidity than surgical management in these cases.

Adolescent↗
PubMed1994

Fungal sinusitis.

Fungal disease of the paranasal sinuses is an important and underrecognized entity that affects both immunocompromised and previously healthy subjects. The spectrum of disease includes fungal balls, allergic fungal sinusitis, chronic indolent fungal sinusitis, and invasive fungal sinusitis. The radiologic, immunologic, and histopathologic findings are unique for each of these conditions. The surgical and medical management of these diseases is discussed and four case studies are presented.

Adult↗
PubMed1993

Surgical correction of the Treacher Collins malar deficiency: quantitative CT scan analysis of long-term results.

This paper describes an alternative means of reconstruction of the Treacher Collins zygomatic deficiency and presents a consecutive patient series with long-term follow-up documented by clinical and quantitative means employing CT-derived craniofacial skeletal measurements. Eight children (mean age at operation 10.5 years) underwent bilateral zygomatic reconstruction with full-thickness, T-shaped calvarial bone grafts contoured three-dimensionally and then inset and stabilized with plate-and-screw fixation, with exposure provided only by a coronal incision. Orbital floor defects and graft donor sites were repaired with fixed split-thickness cranial bone. No complications occurred during surgery, and donor sites healed without clinical defect. Zygomatic augmentation was achieved in all patients, with follow-up ranging from 24 to 50 months (mean 35 months). CT scanning done before surgery, immediately afterward, and again 1 year or more later demonstrated significant increases in lateral orbital wall length, lateral orbital distance, interzygomatic arch distance, and zygomatic arch length. The late postoperative scans showed that these changes were maintained. However, effective treatment of the surrounding soft-tissue and eyelid deficiencies remains an unsolved problem.

Bone Transplantation↗
PubMed1993

How to manage burns in primary care.

Burns are common injuries; more than 200,000 occur in Canada annually. Nearly all burn injuries can be managed on on outpatient basis. Appropriate treatment depends on burn depth, extent, and location. Special types of burns, such as chemical, tar, and electrical injuries, need specific management strategies. Prevention through education is important to reduce the incidence of burns.

Body Surface Area↗
PubMed1992

Craniofacial skeletal measurements based on computed tomography: Part I. Accuracy and reproducibility.

Computed tomography (CT) is a useful modality for the management of craniofacial anomalies. A study was undertaken to assess whether CT measurements of the upper craniofacial skeleton accurately represent the bony region imaged. Measurements taken directly from five dry skulls (approximate ages: adults, over 18 years; child, 4 years; infant, 6 months) were compared to those from axial CT scans of these skulls. Excellent agreement was found between the direct (dry skull) and indirect (CT) measurements. The effect of head tilt on the accuracy of these measurements was investigated. The error was within clinically acceptable limits (less than 5 percent) if the angle was no more than +/- 4 degrees from baseline (0 degrees). Objective standardized information gained from CT should complement the subjective clinical data usually collected for the treatment of craniofacial deformities.

Adult↗
PubMed1992

Craniofacial skeletal measurements based on computed tomography: Part II. Normal values and growth trends.

Current diagnosis and surgical correction of craniofacial anomalies would benefit from accurate quantitative and standardized points of reference. A retrospective study was undertaken to define normal values for a series of craniofacial measurements and to evaluate the growth patterns of the craniofacial complex through axial computed tomography (CT). Fifteen measurements were taken from 542 CT scan series of skeletally normal subjects. The measurement values were then divided into 1-year age categories from 1 to 17 years, and into four age groups for those under 1 year of age. The normal range and growth pattern of measurement values for the cranial vault, orbital region, and upper midface are presented. The overall size of the cranio-orbito-zygomatic skeleton reaches more than 85 percent of adult size by age 5 years. The cranial vault grows rapidly in the first year of life but growth levels off early. The upper midface grows at a slower rate in infancy, but continues to grow later in childhood and early adolescence. Knowledge of the differential growth patterns and normal measurement values in the craniofacial region will help improve diagnostic accuracy, staging of reconstruction, precision of corrective surgery, and follow-up of patients.

Adolescent↗