Seeing the OR Through a Human Factor Lens: What Medical Students Can Learn Now to Improve Patient Safety

by Nicolas Rea

For many medical students, the operating room is one of the most formidable environments in medicine. Unfamiliar alarms echo, complex equipment surrounds the patient, and tightly coordinated teamwork unfolds with precision around a single, shared goal: patient safety. To the student beginning an anesthesiology rotation, the focus often centers on mastering physiology, pharmacology, and procedural skills. Yet evidence from perioperative safety research reveals that adverse events more often stem from weaknesses in system design and team coordination than from deficiencies in medical knowledge.¹ 

Human factors engineering is the science of designing systems around real people, rather than idealized ones. In anesthesiology, this means recognizing providers can become distracted, cognitively overloaded, or fatigued during critical moments, and ensuring that equipment layout, workflows and communication structures compensate for these vulnerabilties.² For medical students, recognizing this early shifts the focus from individual performance alone to system awareness, transforming how we learn in the operating room and how we contribute to safer patient care.  

The Fresh Eyes Advantage 
Students bring a unique perspective to the OR, as we notice things that veterans have learned to normalize. During my first day on anesthesia, I worked in two different operating rooms with entirely different anesthesia machines and airway carts, each arranged in its own distinct way. The resident and attending navigated each set up effortlessly, while I hesitated, scanning drawers and searching for equipment. This variability illustrates a classic human factors problem, as when layouts change, cognition shifts from automatic recognition to active searching. In routine moments, this costs seconds, but in emergency situations, that could be the difference between life and death. That experience reshaped my understanding of safety; it is not determined solely by individual preparedness or technical skill, but by how predictable and intuitive the environment is under stress. 

As medical students grow more familiar with the OR, we should approach it as a system to be studied, rather than as just a stage for procedures. Begin to explore why certain medications are color-coded the way they are, why monitors alarm with specific tones, or why routine checklists persist even for experienced clinicians. These are not arbitrary habits, but they are deliberate design choices built to protect against human limitation. Notice how seasoned anesthesiologists position their equipment very strategically, so their eyes rarely leave the patient, and their hands move without hesitation. These observations help cultivate situational awareness, so students can further perceive the present, anticipate what comes next, and prepare before instability unfolds. 

United in Vigilance
Anesthesiology is profoundly interdisciplinary, from surgeons appreciating how positioning affects airway access, to nurses recognizing early signs of inadequate analgesia, to technicians knowing which laryngoscope batteries die first. Each member of the OR team contributes to a shared safety net. For students, engaging broadly with the entire team provides a richer education than focusing solely on pharmacology or airway technique, helping to develop a diverse view to grow into more well-rounded residents. Observing how experienced team members speak up about concerns, call for help early on, or debrief and reflect after challenging cases teaches students that safety is collective, not individual.

Small Habits, Large Effects 
Human factors thinking encourages small, deliberate behaviors that meaningfully reduce risk: 
 - Standardization: Develop consistent setup patterns so reaching for equipment becomes automatic rather than cognitive.
 - Attention: Recognize high-risk moments, such as induction, emergence, and handoff, when distractions should be minimized, and be aware of the small details.
 - Curiosity: Use downtime to ask thoughtful questions rooted in your inquisitiveness, demonstrating engagement and deepening system understanding.
 - Near-miss reflection: When something almost goes wrong, analyze what system safeguards aided recovery, and what could be strengthened.

Students can implement these simple strategies immediately to begin to build good habits. Simple but powerful practices, such as arranging medications in a consistent or predictable order, or confirming patient identity aloud, contributing to a culture where safety is engineered rather than hoped for. Imagine a patient crashing in a critical moment of a cardiac case, where something as simple organizing pressors with the needle pointing upwards can help minimize error, increase proficiency, and improve safety. Designing environments in which the safest action is also the easiest action is the essence of patient safety, and students can begin building that discipline from day one.  

From Observation to Identity
Adopting a human factor lens transformed how I understand anesthesiology, as I no longer view safety solely as a personal virtue, but as a product of deliberately designed systems inhabited by imperfect humans. For students, this mindset offers two advantages. First, it provides practical ways to contribute meaningfully before mastering advanced procedures. Second, it lays the foundation for the kind of anesthesiologist we hope to become; one who protects patients by crafting environments in which doing the right thing is the easiest thing. 

The operating room will always be intense, but it need not be chaotic. By paying attention to design, communication, and teamwork, medical students can begin advancing patient safety long before residency begins. Human factors thinking challenges us to look beyond monitors and medications to the broader system surrounding each patient, and to accept responsibility for building environments where reliability is engineered, not hoped for.

References

1. Rayan, A. A., Hemdan, S. E., Shetaia, A. M. 2019. “Root Cause Analysis of Blunders in Anesthesia.” Anesthesia Essays and Researches, 13(2):193-193. https://pmc.ncbi.nlm.nih.gov/articles/PMC6545954/

2. Sinha, A., Singh, A., Tewari, A. 2013. “The fatigued anesthesiologist: A threat to patient safety?” Journal of Anaesthesiology Clinical Pharmacology, 29(2):151-159. https://pmc.ncbi.nlm.nih.gov/articles/PMC3713658/