A study of the ultrastructural features of the cut margin of skin and mucous membrane specimens excised by carbon dioxide laser.
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Biomedical subjects
Publications and source records attributed to I Kaplan.
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In a comparative experimental study, excisions of a transplanted Lewis lung carcinoma in BDF1 mice were performed by means of the CO2 laser and conventional methods, namely common scalpel and diathermy. The results showed a significant reduction in tumor recurrence and animal mortality rates (27.5% vs. 75% and 45%) after tumor excision with the laser in the early stage (5th day) of tumor development. This finding, in addition to the surgical properties of the CO2 laser, suggests that early excision using this modality is a rational treatment of this type of tumor.
We describe the use of the extensor pollicis longus tendon as an extension of the motor unit in an opponens transfer. Its advantages, and its successful application in 4 cases, are illustrated. To the best of our knowledge, this method has not been described before. We believe it to be a satisfactory addition to the other methods described.
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Treatment of cadaver skin homografts in vitro with glutaraldehyde significantly prolonged their average retention time from 10.9 to 21.8 days in 21 patients with burns and/or extensive soft tissue injuries. The glutaraldehyde-treated homografts serve as a useful non-viable wound cover. They remain adherent to the wound bed for prolonged periods and support the formation of granulation tissue favourable for the subsequent acceptance of autografts. Toxic symptoms or allergic reactions were not noticed in any of the recipients. Treatment of the skin with glutaraldehyde is simple to perform, requires minimal laboratory equipment, and is not time consuming.
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A sample of 33 dyslexic and 33 control children were compared on tasks involving visual matching with spatial transformation (VMST), tactual serial matching (TSM), visual sequential memory (VSM), and auditory sequential memory (ASM). Contrary to expectation, the dyslexics performed at the same level as controls on VMST. This result was not explicable as a floor or ceiling effect and was considered evidence that dyslexics do not suffer impairment in visual spatial transformation ability per se. Dyslexics were not significantly different on TSM, but were inferior to controls on VSM and ASM.
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