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Biomedical subjects

S Ravi

Publications and source records attributed to S Ravi.

29 records · Page 2Linked to original sources
PubMed1990

Multiple cutaneous nerve abscesses on a healed tuberculoid patch.

A case of healed tuberculoid leprosy (TT) with multiple superficial nerve abscesses involving the whole cutaneous network on the patch is reported. To the best of our knowledge multiple cutaneous nerve abscesses involving the entire subcutaneous plexus on a TT patch is a very uncommon observation.

Abscess↗
PubMed1986

Colitis caused by non-steroidal anti-inflammatory drugs.

Four cases of acute proctocolitis associated with non-steroidal anti-inflammatory drug therapy are presented. The drugs implicated were flufenamic acid, mefenamic acid, naproxen and ibuprofen. After resolution of symptoms and signs of proctocolitis three of the four patients were subsequently rechallenged with the implicated drug: in each there was a rapid relapse.

Aged↗
PubMedDate not supplied

Quantitative angioscopy: a novel method of measurement of luminal dimensions during angioscopy with the use of a "lightwire".

PURPOSE: To determine the accuracy and reproducibility of luminal dimension measurements of a newly developed method of quantitative angioscopy. METHODS: A method was developed for quantitation of luminal dimensions during angioscopy, as variation in magnification with lens-object distance and ambiguity associated with identification of corresponding points about the circumference of a given discrete cross-section render subjective estimates unreliable. A transverse ring of fiberoptically transmitted light was emitted from a guidewire or its housing at a known distance from the distal end of an angioscope and discrete cross-sections of interest were observed as the ring of light was reflected from the luminal surface. Caliper measurement of the diameter of the light ring image (< 50 mW at 488/515 nm), obtained on angioscopic video recordings of cylindrical phantom vessels of known dimensions, was performed by three observers on five occasions. RESULTS: The mean absolute difference between measured and known luminal diameter (n = 405 observations) was 65 microns +/- 35 microns and the mean coefficient of variation was 4.2%, and the mean difference between measured and known areas (n = 195 observations) was 0.4 mm2, with a mean coefficient of variation of 6.5%. CONCLUSION: By use of this new lightwire method, luminal dimensions can now be measured in vitro with a high degree of accuracy and reproducibility during angioscopy.

Angioscopes↗