Related Experiment Video
Updated: Feb 3, 2026

Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
Published on: April 10, 2017
Treatment of the Prominent Ear: A Standardized Approach Without Intraoperative Measurements
Zoe M MacIsaac1, Lauren Zammerilla, Lorelei J Grunwaldt
1Children's Hospital of Pittsburgh, University of Pittsburgh Pediatric Plastic and Reconstructive Surgery, Pittsburgh, PA.
Background:
Candidates for otoplasty have variable anatomy that may result in an aesthetically suboptimal appearance. The authors describe an algorithm to obtain ideal aesthetic position of the ear using a standardized suturing only technique.
Methods:
A retrospective review was conducted at a major children's hospital. Pre- and postoperative distances from the mastoid to the posterior lateral helical rim were measured at 3 consistent points (upper helix, mid helix, and lobule). Cosmetic outcomes were determined by visual analog cosmetic score (VACS), assigned by 3 independent reviewers.
Results:
A total of 26 patients underwent otoplasty for prominent ear (average age 8.2 years). Duration of follow-up was an average of 32 weeks postoperatively. Pre- and postoperative VACSs were determined for all patients: overall-appearance, 25.8 versus 71.3; overall-ear appearance, 25.7 versus 70.0; shape, 24.4 versus 72.6; and projection, 23.7 versus 73.9 (P < 0.05 for all). There was no inter-rater difference between scores. There was greater symmetry between ears postoperatively (P < 0.05). Measurements were significantly improved pre- versus postoperatively: upper-helix 2.04 versus 1.20 cm, mid-helix 2.22 versus 1.18 cm, and lobule 1.85 versus 1.49 cm (P < 0.05.) Postoperative measurements are in accordance with established norms for ideal ear position (1.0-1.2 cm upper third of the ear). Two patients recurred, and 1 experienced a spitting suture (11.5%).
Conclusion:
Aesthetic ideal was established on the operating table based on the appearance of the ear. Postoperative measurements fell within aesthetic ideal for a normal ear, suggesting that the use of intraoperative measurements are not needed to obtain an aesthetically acceptable outcome.
Related Concept Videos
Measurement: Standard Units
Units and Standards of Measurement
Measurements of physical quantities are...
Anatomy of the Ear
Standard Electrode Potentials
Standard Enthalpy of Formation
Calculating Standard Free Energy Changes

