Video Techniques and Data Compared with Observation in Emergency Trauma Care
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ii51 Video techniques and data compared with observation in emergency trauma care C F Mackenzie, Y Xiao ............................................................................................................................... Qual Saf Health Care 2003;12(Suppl II):ii51–ii57 Video recording is underused in improving patient safety additional studies.4 In comparison, studies car- ried out in laboratory settings do not recreate and understanding performance shaping factors in patient many of the real life variables such as risk, care. We report our experience of using video recording uncertainty, composition of teams, and the techniques in a trauma centre, including how to gain workplace domain. These are significant factors in determining performance during real world cooperation of clinicians for video recording of their dynamic and stressful events. workplace performance, identify strengths of video This paper describes our experiences of using compared with observation, and suggest processes for video recording in research in a trauma centre during real emergency resuscitation, surgery, consent and maintenance of confidentiality of video and anaesthesia; it is not about technical aspects records. Video records are a rich source of data for of video recording. The goal is to summarize the documenting clinician performance which reveal safety lessons learned and principles used in deploying video recording methodologies and in exploiting and systems issues not identified by observation. the advantages offered by the video medium.56 Emergency procedures and video records of critical events Video is perceived as the richest medium for identified patient safety, clinical, quality assurance, systems capturing the smallest and briefest particulars of human interaction while retaining the context of failures, and ergonomic issues. Video recording is a the event and making it available for analyses by powerful feedback and training tool and provides a multiple or independent subject matter experts.5 reusable record of events that can be repeatedly reviewed Video recording in the medical environment makes it possible for clinicians to review their and used as research data. It allows expanded analyses of own activities and for analysts to extract time critical events, trauma resuscitation, anaesthesia, and qualitative and quantitative data. surgical tasks. To overcome some of the key obstacles in Despite these advantages of video recording, challenges abound—such as gaining support deploying video recording techniques, researchers should from those being recorded, securing patient (1) develop trust with video recorded subjects, (2) obtain confidentiality, overcoming medicolegal obsta- clinician participation for introduction of a new protocol or cles, and effectively using the medium.56 This paper focuses on three key methodology issues line of investigation, (3) report aggregated video recorded relating to the use of video techniques in clinical data and use clinician reviews for feedback on covert environments: processes and cognitive analyses, and (4) involve N the importance of communication with, and multidisciplinary experts in medicine and nursing. development of trust with, video recorded ........................................................................... subjects; N the differing use and content of information available from video compared with observa- n understanding of the strengths and tional data; weaknesses of human performance has N suggestions to assist issues of participant Adirect implications for strategies to improve quality of health care and patient safety. consent as well as to minimize loss of However, our knowledge of human performance confidentiality/privacy. in real, complex, and dynamic environments such as those found in clinical care settings is limited.1 Studies of healthcare providers in their COMMUNICATION WITH SUBJECTS TO natural settings could provide an insight into GAIN THEIR PARTICIPATION IN VIDEO See end of article for how teams work under time pressure, with RECORDING authors’ affiliations ....................... constant interruptions, and in suboptimal work- Development of trust with video recorded places. Previous studies of naturalistic decision subject Correspondence to: making and team performance have highlighted Our work was based in a single trauma centre at Dr C F Mackenzie, The Charles McC Mathias Jr, the advantages of understanding expert human the University of Maryland. Details of this facility National Study Centre for activities in real, complex, and dynamic environ- are shown in box 1. Trauma and EMS, 701 W. ments.2 Primary strengths of ethnographic obser- The purpose of our original video recording Pratt Street, 518 Baltimore, vations are that they support a discovery effort was to examine real events in detail and to MD 21201-1023, USA; process,3 draw attention to significant phenom- detect how clinicians performed in stressful cmack003@ umaryland.edu ena, and suggest new theories whose validity conditions of trauma patient resuscitation. ....................... and generality can then be evaluated through Because of medicolegal, employment, privacy, www.qshc.com ii52 Mackenzie, Xiao management) in association with a specific research protocol. Box 1 University of Maryland shock trauma The video record was available for review after the event and, centre on request of the video recorded subject(s), it would be erased if they considered that inappropriate or liability issues N Patients: more than 7000/year were recorded. N Motor vehicle crashes 55%, interpersonal violence The phases of different strategies for video acquisition are 16%, falls 21%, other 18% shown in box 2. N 42% admitted directly by helicopter from scene of injury Phased approach to scale up of video recording For the first study video cassette recorders and single ceiling N 85% within 1 hour (‘‘golden hour’’) directly from scene mounted cameras installed in two trauma resuscitation unit of injury bays and two operating rooms were focused only on the N Facilities: stand alone 110 bed trauma centre activities of the anaesthesia care providers. The advantage of N Ten resuscitation bays, six operating rooms, seven this approach was that the equipment was relatively PACU beds, trauma critical care unit, neurotrauma inexpensive and the collaboration of only one group of unit, intensive care clinicians was required. The process of video acquisition was N Staffing: faculty surgeons, anaesthesiologists, emer- fully automated, with the equipment located on the gency medicine, critical care physicians, fellows, anaesthesia machine. A single button pushed by the research residents, nurse anaesthetists, trauma nurses, techni- subject started recording of audio-video signals, the machine cians, administrators readable time code, and video overlay of vital signs data through a serial interface and video card (fig 1). For the second upgrade in video acquisition we expanded the recording site locations to six of 10 trauma resuscitation and confidentiality issues and review of their own perfor- unit bays and added pan-tilt zoom cameras. We found that in mance by peers, many clinicians were wary about video some of the earlier video records, the single camera view was recording. We used several procedures to gain the confidence obstructed by equipment or other care providers. The and trust of the research subjects that video recording would additional and more detailed view was synchronized by only be used for research and educational purposes. digital time code with the environmental overview camera. Control of video recording was given to the study research Having shown that no adverse consequences occurred during subjects (initially this was anaesthesiology clinical care the earlier research subject controlled video recording, a providers). They started and stopped the equipment, which telecontrol centre was built to integrate all the audio-video was located within arms’ reach of their normal working and vital signs signals where a technician instigated video position at the head of the patient (fig 1). LED lights on the recording remotely (fig 2). A mobile video acquisition system camera and video cassette recorder were illuminated during with a tethered head mounted camera was designed to be recording so that other clinicians working in the same area as useable in all the trauma resuscitation unit bays or operating the research subjects could be made aware that video rooms not already instrumented for video acquisition (fig 3). recording was underway. Collecting of video data occurred The third upgrade of video acquisition capability included in only two locations among 10 in the resuscitation areas instrumenting all the trauma resuscitation unit bays and six and two of six operating rooms. This enabled those who operating rooms with multiple ceiling mounted cameras.13 In felt uncomfortable with the video recording to have an addition, a wireless head mounted camera was designed and alternative location for providing patient care. Video record- built to allow image retrieval from operators during ing was focused around a specific stressful task (airway emergency tasks (fig 4). An infrared mobile wireless audio Patient vital signs display Time code Anesthesia machine Ventilator VCR Figure 1 Operating room activity with overlay of patient vital signs: HR = heart rate; SBP, MBP, DBP = systolic, mean, and diastolic arterial pressure; ETCO = end tidal CO2 pressure; SaO2 =O2 saturation; TMP = temperature (