RI-00008 I apologise for the misunderstanding, but it appears that there may be one. There is no surgical tool known as “Meyerding retractors” that is frequently used as of my knowledge cutoff in September 2021. It’s likely that this phrase refers to a particular retractor model utilised by a particular physician, institution, or surgical speciality. I am, however, unable to provide particular information regarding Meyerding retractors without additional context or information. Retractors are often medical devices used to hold or separate tissues so that the surgeon has better access to and visibility of the surgical site. To meet varied operations and anatomical features, they are available in a variety of shapes, sizes, and patterns. Please give more information if you have more information or context on Meyerding retractors.