Liquid paraffin wipe: A preferred method in wet onychoscopy
How to cite this article: Sangwan P, Behera B, Garg S. Liquid paraffin wipe: A preferred method in wet onychoscopy. CosmoDerma 2023;3:125.
Onychoscopy, a dermoscopic examination of the nail unit, is a helpful non-invasive method to aid the diagnosis. Immersion fluid is often needed to facilitate the visualization of subsurface changes in the nail plate and nail bed. Onychoscopic examination without immersion fluid hinders the visibility of dermoscopic details due to overlying scales and dirt [Figure 1a]. In contrast to dermoscopy of skin, the immersion fluid used during onychoscopy gets accumulated due to the convex surface of the nail plate. As a result, the underlying structures get blurred and hamper good dermoscopic evaluation and image acquisition. In addition, bubbles resulting from this method further impede visibility [Figure 1b]. Furthermore, the blurring effect with ultrasound gel is relatively more due to its thicker consistency, and the use of acetone for getting rid of surface dirt leaves behind white marks.
During the liquid paraffin wipe method, we put liquid paraffin on a folded tissue paper and wipe the nail plate and folds instead of directly putting liquid paraffin drops on the nail plate surface. It facilitates the visualization of the deeper nail plate and nail bed details without interfering with the visibility [Figure 1c] due to the absence of excess oil and bubbles. In addition, it gets rid of surface dirt and scales.
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Use of artificial intelligence (AI)-assisted technology for manuscript preparation
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