Scalpel PDF

Jump to navigation Jump to search The Harmonic scalpel is a surgical instrument used to simultaneously cut and cauterize tissue. The harmonic scalpel may be superior to electrosurgery in that it can cut through thicker tissue, creates less toxic surgical smoke, and may offer greater precision. The harmonic scalpel is not as easily maneuverable as an electrosurgical instrument, and takes longer to scalpel PDF and coagulate tissue. A Harmonic scalpel cuts via vibration.


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The scalpel surface itself cuts through tissue by vibrating in the range of 55,500 Hz. The high frequency vibration of tissue molecules generates stress and friction in tissue, which generates heat and causes protein denaturation. This technique causes minimal energy transfer to surrounding tissue, potentially limiting collateral damage. Fitzgerald JEF, Malik M, Ahmed I. A single blind controlled study of electrocautery and ultrasonic scalpel smoke plumes in laparoscopic surgery. Msika S, Deroide G, Kianmanesh R, et al. Harmonic scalpel in laparoscopic colorectal surgery ».

The harmonic scalpel: an intraoperative complication ». The use of the harmonic scalpel vs conventional knot tying for vessel ligation in thyroid surgery ». This article needs additional citations for verification. Scalpels may be single-use disposable or re-usable.

Surgical scalpels consist of two parts, a blade and a handle. The handles are often reusable, with the blades being replaceable. The handle is also known as a « B. Charles Russell Bard and Morgan Parker, founders of the Bard-Parker Company.

Morgan Parker patented the 2-piece scalpel design in 1915 and Bard-Parker developed a method of cold sterilization that would not dull the blades, as did the heat-based method that was previously used. The handle of medical scalpels come in two basic types. 7 handle is more like a long writing pen, rounded at the front and flat at the back. Blades are manufactured with a corresponding fitment size so that they fit on only one size handle.