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The Sharpness of Blades Used in Dermatologic Surgery
Farah Awadalla1, Camile Hexsel, Leonard H Goldberg
1Weill Cornell Medical College, The Methodist Hospital, Houston, Texas.
Summary
The double-edged razor blade is the sharpest surgical blade, requiring the least force to cut. Blade sharpness is crucial for dermatologic surgery performance and should guide selection.
Area of Science:
- Dermatologic Surgery
- Surgical Instrumentation
- Biomedical Engineering
Background:
- Numerous blade types exist for dermatologic procedures, each with unique advantages based on shape and size.
- Blade sharpness is a critical performance factor, yet it lacks objective definition.
- Quantifying sharpness can aid in selecting appropriate blades for specific surgical tasks.
Purpose of the Study:
- To objectively define and quantify the sharpness of blades utilized in dermatologic surgery.
- Establish a standardized method for assessing surgical blade sharpness.
Main Methods:
- The Sharpness Tester (Cutlery and Allied Trades Research Association, Sheffield, UK) was employed to measure the force (in Newtons) required for blades to cut a standardized silicone cylinder.
- Testing included both new blades to establish a baseline sharpness standard and surgically used blades to assess post-use degradation.
Main Results:
- The double-edged razor blade exhibited the highest sharpness (0.395 N).
- Other tested blades, in order of decreasing sharpness, included the dermablade (0.46 N), plastic-handled #15 (0.541 N), #15c (0.575 N), #10 (0.647 N), and #15 blade (0.664 N).
Conclusions:
- Blade sharpness is a quantifiable metric directly impacting surgical performance.
- Objective sharpness data should be considered when selecting blades for dermatologic procedures to optimize outcomes.
