Fig. 1
From: Retraction mechanics of Finochietto-style self-retaining thoracic retractors
Instrumented Finochietto retractor for quantifying retraction in animal studies. Each blade has four strain gages mounted in a full-bridge configuration, maximizing force measurement sensitivity while compensating for temperature effects. Linear displacement sensor measures distance between retractor arms at their bases (DA), while the distance between retractor blades, DB, is measured using a modified draftsman’s caliper (not shown)