PubMed · 7014181
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G R Holt, J E Holt. 1981. Suture materials and techniques.. https://pubmed.ncbi.nlm.nih.gov/7014181/
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This article summarizes the life and work of James Barrett Brown, MD (1899-1971), a plastic surgeon from St Louis, Mo, whose many contributions to the knowledge of surgery include his pioneering use of large split-thickness skin grafts to resurface defects. Along with a coauthor, he published an excellent book on radical neck dissection in 1954 (Neck Dissections, published by Charles C. Thomas, Springfield, Ill). Brown was a leading figure in the organization of high-quality plastic surgical care to injured soldiers in World War II. His training program in plastic surgery at Barnes Hospital in St Louis provided education to many leaders in the field. He received a number of honors for his many accomplishments.
Calculations and experiments were used to examine the B(1) field behavior and signal intensity distribution in a 16-cm diameter spherical phantom excited by a 10-cm diameter surface coil at 300 MHz. In this simple system at this high frequency very complex RF field behavior exists, resulting in different excitation and reception distributions. Included in this work is a straightforward demonstration that coil receptivity is proportional to the magnitude of the circularly polarized component of the B(1) field that rotates in the direction opposite to that of nuclear precession. It is clearly apparent that even in very simple systems in head-sized samples at this frequency it is important to consider the separate excitation and reception distributions in order to understand the signal intensity distribution.
We prospectively tested the hypothesis that prevention of lateral movement of the head, using a specially designed head support apparatus, would prevent oxygen desaturation in preterm infants restrained in car seats. Preterm infants reaching 34 to 35 weeks' gestation were studied at the week of discharge in 3 different conditions for 20 minutes each time: supine decubitus, sitting position in a newborn car seat, and sitting position in the car seat equipped with an apparatus that supports the head, while monitored by pulse oxymetry. Data are expressed as percent of time over each period during which the oxygen saturation was below 90, 92, 94, or 96%. Statistical analysis was by analysis of variance (ANOVA) followed by paired Student t-test for differences of means. There were no significant differences among groups in percent of time with oxygen saturation below 96, 94, 92, or 90%. Oxygenation is not improved in relatively healthy preterm infants placed in a car seat when their head is supported to prevent lateral movements by a special apparatus.