The importance of rigorous testing of circumference measuring callipers

✍ Scribed by Nicholas J. Dudley; Kate Griffith

• Book ID: 104324574
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 255 KB
• Volume: 22
• Category: Article
• ISSN: 0301-5629
• DOI: 10.1016/s0301-5629(96)00100-7

✦ Synopsis

On-screen circumference measurements are frequently made in obstetric ultrasound and are also made in other ultrasound specialties. The accuracy of electronic callipers is traditionally checked by linear measurement in a test object; this does not adequately test callipers used for nonlinear measurement. This technical note describes a simple test object designed for both linear and nonlinear calliper checks. Results show one machine to generate consistently large overmeasurements (15%). The clinical consequences of such overmeasurement may be serious. Appropriate quality control is essential.