Left-handed use of surgical instruments: improved function through understanding instrument design

To explain design features of scissors and surgical instruments that work against left-handed users and demonstrate how the user can adapt their technique for ambidextrous use of standard instruments.

Any species.

Standard instruments are designed for maximal efficiency with the use of a right-handed grip. A gripping motion results in pushing force from the thumb and pulling of the fingers toward the palm. Both scissor blades and hemostat/needle driver box locks are oriented such that these natural forces act to push the scissor blades against each other or open the box locks. Using standard scissors with a left-handed grip is less efficient and more likely to cause tissue trauma. To use a right-handed instrument with the left hand, the thumb must instead be pulled towards the palm. This is effective but less ergonomic and requires more conscious practice. Sharp, well-maintained scissors are essential to mitigate tissue trauma.

Understanding how pressure needs to be applied for opening of box locks and apposition of scissor blades results in improved efficiency of instrument use and precision of scissor cuts.

Left-handed people are often adept at adjusting to equipment optimized to right-handed users. However, learning surgical skills from right-handed surgeons can be frustrating, requiring individual trial and error. Understanding the design features of surgical instruments improves efficiency for left-handed users and facilitates teaching of left-handed trainees by right-handed surgeons.