Study links six-person canine CPR teams to better decision-making: full analysis

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A newly published simulation study is putting a finer point on a familiar reality in veterinary emergency care: CPR success depends on more than technical skill. In the April 9, 2026, online-ahead-of-print paper in the Journal of Veterinary Emergency and Critical Care, investigators found that six-rescuer teams outperformed four-rescuer teams in the assessment and decision-making domain of a validated nontechnical skills framework during high-fidelity canine CPR simulations. Overall nontechnical scores were not significantly different across four-, six-, and eight-person teams, but the six-person configuration stood out in one domain that can shape how a code unfolds in real time. (pubmed.ncbi.nlm.nih.gov)

The work builds on prior veterinary CPR simulation research that has been asking a practical question many hospitals already wrestle with: how many trained people are enough during a code? An earlier related study in canine cardiopulmonary arrest simulation called for more research on the effect of team size on both technical and nontechnical CPR performance. This new paper moves that discussion forward by focusing specifically on teamwork behaviors such as leadership, communication, situational awareness, cooperation, and decision-making, rather than compression mechanics alone. (pmc.ncbi.nlm.nih.gov)

In the study, 48 RECOVER-certified veterinary students were organized into five stable groups of nine or 10 rescuers. From those groups, participants were randomly selected to perform a total of 15 recorded high-fidelity canine CPR simulations using four-, six-, and eight-rescuer configurations. The recordings were scored with the Trauma Non-Technical Skills assessment tool, or T-NOTECHS. Median overall scores were 15 for four-person teams, 21.5 for six-person teams, and 18.5 for eight-person teams, a difference that did not reach statistical significance. The clearest signal came in assessment and decision-making, where six-person teams scored 4.60 ± 0.42, compared with 3.00 ± 1.06 for four-person teams and 3.90 ± 0.55 for eight-person teams. No significant differences were found in leadership, cooperation and resource management, communication and interaction, or situation awareness and coping with stress. (pubmed.ncbi.nlm.nih.gov)

That matters because veterinary CPR protocols already assume a team-based workflow. RECOVER educational materials and allied coverage from AAHA describe distinct code roles, including leader, scribe/timekeeper, compressor, ventilator, and runner or floater, with compressors rotated every two minutes to limit fatigue. Those frameworks also stress closed-loop communication, mock code rehearsal, and post-event debriefing. In other words, the profession has long recognized that resuscitation is a systems problem as much as a procedural one, and this study offers evidence that team structure itself may influence how well those systems function. (aaha.org)

Industry and expert commentary around simulation-based CPR training has been moving in the same direction. In a 2025 dvm360 interview, RECOVER Initiative program director Kenichiro Yagi said simulation gives teams a chance to practice before facing a dying patient on the hospital floor, where it’s too late to learn the process. AAHA’s RECOVER-focused guidance similarly frames preparation, role clarity, and communication as central to performance during arrest events. While neither source comments directly on this new paper, both reinforce the idea that rehearsal and team design are likely to affect code execution in ways that go beyond technical CPR steps. (dvm360.com)

Why it matters: For veterinary professionals, the practical takeaway is less about chasing the largest possible code team and more about matching staffing to task load. A four-person team may be able to cover core functions, but it leaves less margin for documentation, drug preparation, monitoring, role switching, and higher-order decision-making. A six-person team may offer a sweet spot in simulation by offloading enough operational burden to preserve cognitive bandwidth without creating the crowding or coordination drag that can come with larger groups. That last point is an inference, not a direct finding of the paper, but it is consistent with human medical literature showing that nontechnical skills influence resuscitation performance and that excessive movement and coordination complexity can impede team function. (pubmed.ncbi.nlm.nih.gov)

The study also has clear limits. It involved RECOVER-certified veterinary students, not mixed-experience hospital teams, and it used simulation rather than live patients. That means the findings may not map directly onto general practice, overnight ER staffing, or specialty hospitals with different workflows and personnel mixes. The authors themselves note that more work is needed to determine whether the observed difference in nontechnical performance affects technical CPR quality or patient outcomes. (pubmed.ncbi.nlm.nih.gov)

What to watch: Expect the next wave of research to ask whether team-size effects show up in measurable clinical endpoints, such as time to intubation, compression quality, drug delivery, return of spontaneous circulation, or survival to discharge. For practices today, the more immediate implication may be operational: review mock code staffing, define backup roles in advance, and consider whether adding one more trained responder to the CPR response plan could improve how the team thinks as well as how it acts. (pubmed.ncbi.nlm.nih.gov)