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Biomedical subjects

J M Christian

Publications and source records attributed to J M Christian.

9 recordsLinked to original sources
PubMed2006

Fresnel diffraction and fractal patterns from polygonal apertures.

Two compact analytical descriptions of Fresnel diffraction patterns from polygonal apertures under uniform illumination are detailed. In particular, a simple expression for the diffracted field from constituent edges is derived. These results have fundamental importance as well as specific applications, and they promise new physical insights into diffraction-related phenomena. The usefulness of the formulations is illuminated in the context of a virtual source theory that accounts for two transverse dimensions. This application permits calculation of fractal unstable-resonator modes of arbitrary order and unprecedented accuracy.

Journal Article↗
PubMed1993

Thrombosis in children receiving L-asparaginase. Determining patients at risk.

PURPOSE: A prospective study of coagulation in 15 children who received L-asparaginase, vincristine, or prednisone plus or minus an anthracycline as part of a treatment program for leukemia or leukemia-lymphoma syndrome was conducted. PATIENTS AND METHODS: One patient developed a central nervous system thrombosis. RESULTS: The inhibitors of coagulation, including antithrombin-III, protein C, protein S, and plasminogen, were decreased in many individuals, but were not significantly different in the patient who had experienced the thrombotic event. Platelet aggregations to low molar ADP were performed in four patients, and in three patients showed a hyperaggregable pattern. CONCLUSIONS: The patient with thrombosis developed a transient acquired type II pattern on multimeric analysis of the von Willebrand factor, which was not seen in the other individuals studied.

Adolescent↗
PubMed1989

Cleft palate lateral synechia syndrome. Review of the literature and case report.

Cleft palate lateral synechiae syndrome is a rare syndrome consisting of cord-like interalveolar adhesions and concomitant hypoplasia of the mandible. We have presented an infant with CPLS syndrome and coincident hydrocephalus. Surgical division of the adhesions is necessary to allow normal feeding, avoid upper airway obstruction, and allow normal mandibular function and growth.

Abnormalities, Multiple↗
PubMed1989

Treatment of muscle spasms with oral dantrolene sodium.

A case of severe muscle spasms relieved by oral administration of dantrolene sodium is presented. The patient had undergone full-mouth extraction 2 days prior to onset of her spasms. The treatment consisted of intravenous diazepam followed by oral dantrolene sodium. The spasms lasted for approximately 10 days.

Administration, Oral↗
PubMed1985

Cyclosporine-induced gingival hyperplasia: case report and literature review.

A case of gingival hyperplasia was related to the use of cyclosporine for the prevention of renal allograft rejection. With the increasing use of cyclosporine to protect allograft organ transplants, general dentists and dental specialists increasingly will be called on to diagnose and treat gingival hyperplasia.

Adult↗