title: Ergonomic design and evaluation of new surgical scissors.
abstract: The purpose of this study is to design a new surgical scissors handle and determine its effectiveness with various usability indices. A new scissors handle was designed that retains the professional grip but has the shapes of the eye rings modified to fit the thumb and ring finger and finger rests for the index and little finger. The newly designed scissors and traditional scissors were compared by electromyography, subjective evaluation and task performance in experiments using cutting and peeling tasks. The newly designed scissors reduced muscle load in both hand during cutting by the closing action, and reduced the muscle load in the left hand during peeling by the opening action through active use of the right hand. In evaluation by surgeons, task performance improved in addition to the decrease in muscle load. The newly designed scissors used in this study demonstrated high usability.
  A new scissors handle was designed that has the eye rings modified to fit the thumb and ring finger. The newly designed scissors reduced muscle load and enabled active use of the right hand. In evaluation by surgeons, task performance improved in addition to the decrease in muscle load.
authors.affiliation: a Division of Design Science, Graduate School of Engineering, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba , Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Shimomura
authors.affiliation: a Division of Design Science, Graduate School of Engineering, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba , Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Shirakawa
authors.affiliation: b Research Center for Frontier Medical Engineering, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba , Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Sekine
authors.affiliation: a Division of Design Science, Graduate School of Engineering, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba , Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Katsuura
authors.affiliation: c Division of Artificial System Engineering, Graduate School of Engineering, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba , Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Igarashi
mesh_terms: D001132:Arm; D004576:Electromyography; D004867:Equipment Design; D006804:Ergonomics; D005260:Female; D006225:Hand; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal; D013525:Surgical Instruments; D013647:Task Performance and Analysis; D000072178:Urologists; D016474:Weight-Bearing
keywords: electromyography; product design; scissors; surgical tool; usability