The Short Answer: Left-handed surgeons — roughly 10% of the profession — work with instruments, table positions, and training protocols designed exclusively for right-handers. Despite being called 'the last unorganised minority', research shows they perform just as well.

Roughly 10% of the population is left-handed. The same proportion holds among surgeons. But the operating theatre was designed as though left-handed people simply do not exist.

A Right-Handed World

Virtually every surgical instrument in a standard operating room is built for right-handed use. Scissors are ground so the blades cut correctly only when held in the right hand. Retractors are angled for right-handed pulling. Ergonomic handles are moulded for right-handed grips. Even the layout of the operating table and instrument trays assumes a right-handed surgeon.

A survey conducted at Memorial Sloan-Kettering Cancer Center found that left-handed surgeons describe themselves as "the last unorganised minority" in medicine. The phrase stuck, and the research confirmed why.

Training Without Accommodation

Adapt they did, but at a cost. Fewer than half of left-handed surgeons operate primarily with their dominant hand. Most have taught themselves to become partially ambidextrous out of sheer necessity. One memorable training evaluation described a left-handed surgical resident as "ambi-confused" and "ambi-awkward."

Safety Implications

These are not just ergonomic inconveniences. Instruments designed for right-handed use can be actively dangerous in the left hand. Scissors do not cut cleanly. They push tissue apart instead. Needle holders rotate in the wrong direction. Retractors pull at awkward angles, reducing control precisely when control matters most.

For laparoscopic and minimally invasive procedures, the problem intensifies. Port placement, instrument orientation, and camera angles all assume right-hand dominance. Left-handed surgeons must mentally reverse spatial relationships while operating through a screen, an additional cognitive load during already demanding procedures.

A Quiet Acknowledgement

At the Mayo Clinic, there is a small but meaningful tradition: surgeons glove their left hand first. It is a subtle nod to the Mayo brothers, William and Charles, who founded the institution and were both left-handed. It remains one of the only formal acknowledgements of left-handedness in surgical culture anywhere in the world.

One Thing That Does Not Discriminate

In a profession where nearly everything is designed for one hand, surgical attire remains refreshingly egalitarian. A well-designed scrub cap fits every surgeon the same way. No adaptation, no workarounds, no awkward compromises. It is one of the few things in the operating room that works equally well regardless of which hand you favour.

Sources

• Schueneman AL et al., "Left-handedness and surgical training," Current Surgery, 2004. PubMed