Theatre Staff Research Articles

Noise generation during surgical osteotomies in Oral and Maxillofacial Surgery – is it harmful?

AbstractAimOral and maxillofacial surgeons typically spend over 20 h in the operating theatre every week. Many of their procedures involve the use of powered bone and tooth cutting devices, which generate potentially harmful levels of noise. Prolonged exposure to loud noises is associated with hearing loss, increased serum cortisol levels, detrimental cardiovascular outcomes, and poor task performance. This study explores the noise generation of common powered tooth and bone cutting devices in a theatre setting.Materials and methodsBoth compressed air and electric devices were tested. For compressed air devices three burs were tested – jet, round and fissure.ResultsThe study found that at the proximity of the patient and surgeon, all tested devices generated noise above the safe threshold of 75 decibels. At the distance of 1 m or more (corresponding to the anaesthetist and scout nursing staff), the Surgairtome and oscillating saw were the only powered osteotomy devices below the safe noise level.ConclusionsThis study explores the impact of noise generation from powered osteotomy devices. This may have health implications for theatre staff, the surgeon, anaesthetist, and the patient.

Knowledge and attitudes of theatre staff prior to the implementation of robotic-assisted surgery in the public sector.

BackgroundThe use of robotic-assisted surgery (RAS) is becoming increasingly prevalent across a range of surgical specialties within public hospitals around Australia. As a result, it is critical that organisations consider workplace factors such as staff knowledge, attitudes and behaviours prior to the implementation of such new technology. This study aimed to describe the knowledge and attitudes of operating theatre staff from a large public tertiary referral hospital prior to the commencement of an RAS program.MethodsA cross-sectional survey of nursing, medical and support staff working in the operating theatre complex of a large public tertiary referral hospital was completed over a one-week period in June 2016. A 23-item questionnaire was utilised for data collection.Results164 (66%) theatre staff returned the surveys and were included in this study. The majority of medical staff reported being knowledgeable about RAS, whilst the majority of nursing and support staff did not. Overall the theatre staff were neutral about the potential benefits of RAS to patients. The majority of medical staff believed the implementation of RAS will increase the value of staff roles and job satisfaction, while nursing and support staff were uncertain about these benefits. All three staff groups were concerned about the impact of an RAS program on Workplace Health and Safety, and care and handling.ConclusionOperating theatre staff presented different knowledge and attitudes prior to the introduction of RAS. Whilst theatre staff were more favourable towards RAS than negative, they largely reserved their judgement about the new system prior to their own experiences. Collectively, these findings should be taken into consideration for training and support strategies prior to the implementation of a RAS program.

Do theatre staff use face masks in accordance with the manufacturers' guidelines of use?

Surgical face masks are worn by theatre staff to protect the surgical site from airborne contamination and the wearer from bodily fluid splash. This observational/audit aimed to assess whether theatre staff wear masks in accordance with manufacturers'/Centers for Disease Control and Prevention (CDC) guidelines of use. A total of 1034 surgically scrubbed staff were assessed on their technique of applying surgical face masks, compared to the CDC guidelines as manufacturers' guidelines were not available as per Health and Safety Executive guidelines. Only 18% of surgically scrubbed staff fully complied with the CDC guidelines on the application of a face mask. Compliance was worst in urology, ophthalmology and vascular surgeons, whereas orthopaedic and plastic surgeons were the most compliant. Compliance with CDC face mask guidelines may have an impact on surgical site infections (SSI) and protection of staff from body fluid splash, but most staff do not comply with these guidelines. Most operating theatre staff do not apply a face mask using correct technique, outlined in CDC guidance, which may increase SSI rates. Staff are not aware of existing guidelines for donning a mask.

Near Misses" Regarding Cataract Operation In Small Incision Cataract Surgery: How Do We Rectify Understanding And Documentation?

Background: Aim: Near misses are widely reported to the precursors of adverse events that highlight vulnerabilities and potentially unsafe areas of practice .The aim of this study was to see if a descriptive method of recording near misses was an appropriate method for use in an ophthalmic operating theatre and to quantify how many untoward events were recorded using this system related to the cataract surgery. Subjects and Methods: The study was wholly conducted in a operation theatre in the HIMS, Varanasi. The operation theatre staff assigned to the patient in their journey through the operating theatre was asked to note any untoward events. As, at present, there is no consensus definition of near misses in ophthalmology the staff recorded, in free text, any events that they considered to be a deviation from the normal in that theatre. Results: 250 cataract cases were randomly enrolled, 48 deviations from normal routine were described in 46 patients - that is, 19% of cases. All forms distributed to the staff were returned (100% response rate). The commonest abnormal events were intraoperative (35), with a lesser number being recorded preoperatively (13). When these events were further classified, it was thought that 13 could be classified as near misses. Once true adverse event was recorded during the study. Conclusion: The result suggest that experienced staff in an ophthalmic theatre are a reliable source for collecting data regarding near misses. A consensus is now required to define near misses in ophthalmology and to devise a user friendly input system that can use these definitions to consistently record these potentially vital events.

‘Golden Patient’: A quality improvement project aiming to improve trauma theatre efficiency in the Royal Gwent Hospital

The efficiency of trauma lists when compared with elective orthopaedic lists is a frustration of many orthopaedic departments. At the Royal Gwent Hospital, late start times affecting total operating capacity...

The Influence of Operation Theater Environment on Patients' Perceptions During Awake Procedures: A Cross-sectional study

To determine the perceptions of patients regarding operation theatre conversation and environment during an awake procedure. The descriptive, cross-sectional study was conducted from February to August 2017 in postoperative wards of Military Hospital, Rawalpindi, Pakistan, and comprised women undergoing gynaecological or obstetric procedures under regional anaesthesia. Closedended questionnaires were distributed via nonprobability convenient sampling. Operation theatre data was collected from the anaesthesia notes, and data was analysed using SPSS 22. There were 93 female subjects with a mean age of 28.23}5.42 years (range: 19-48 years). Overall, 90(96.8%) subjects regarded the conduct of operation theatre staff as cooperative and friendly with 64(68.8%) viewing the conversation among the staff as helpful in relieving anxiety. The thought of anaesthesia waning caused anxiety in 40(43%) subjects, but there was no difference in perceived anxiety between those counselled 61(65%) and not counselled by the anaesthetist. With regards to the environment, 41(44%) subjects said more measures were required to prevent patients from seeing the operating field. Besides, 30(32.2%) and 20(21%)subjects had reservations regarding the presence of male staff and medical students respectively. The opinion regarding medical professionals did not change for 60(64%) subjects after the procedure, and 37(39.8%) recommended that communication skills of medical professional needed improvement. The environment in the theatre can have an influence on the patient's anxiety levels. Counselling by surgeons, casual conversations in the theatre can help alleviate apprehensions of the patients.

Keeping your cool - a simple reusable neck cooler in orthopaedic surgery: a pilot randomized controlled trial.

Infection in orthopaedic surgery can be catastrophic. Increased perspiration from theatre staff has been associated with higher rates of wound contamination. Wearing lead safety gowns, which is often done during surgery to allow the use of image intensifier, may result in heavy perspiration. This study aimed to determine the feasibility of wearing a neck cooling device during surgery and whether it reduced surgeons' subjective discomfort and perspiration levels during orthopaedic procedures requiring the use of lead gowns. A pilot randomized controlled trial was conducted. Surgeons were randomized to either wearing the neck cooling device (intervention) or not wearing the device (control). Procedure duration, theatre temperature, humidity and perceived technical difficulty of operation were recorded. After the procedure, surgeons completed a questionnaire documenting how the temperature and humidity had a negative effect on their comfort and perceived level of perspiration. Multilevel mixed effects linear regression with random effects, adjusting for potential confounders was performed. Alfred Ethics Committee approved the study and the trial was registered (ACTRN12618000976280). A total of 29 cases (44.6%) were randomized to the intervention group and 36 to the control group. Adjusting for operating room temperature and perceived difficulty of surgery, the neck cooler reduced surgeons' level of discomfort by 1.9 points (95% CI 1.1-2.8, P < 0.001), as well improved on their self-reported perspiration by approximately 1.9 points (95% CI 1.0-2.8, P = 0.04). Wearing a neck cooling device during surgery is feasible, reduces perceived levels of perspiration and decreases the negative impact of temperature and humidity on surgeons' comfort levels.

Aviation-based teamwork skills work for surgeons: time for an 'aviation bundle'?

Aviation systems were developed to improve safety and have achieved remarkable results. Medicine has looked to replicate these systems; however, the gap in outcomes between the two industries remains vast. Bridging this chasm requires an in-depth analysis of the applicability of the aviation safety model in surgery. This study uses qualitative methods to explore how aviation-based practices may be adapted and applied more effectively in theatre. Data were collected using multiprofessional focus groups in a single centre. The focus groups involved discussion around teamwork and aviation-based non-technical skills. With consent, audio recordings were anonymized and transcribed. Qualitative (thematic) analysis was used to identify themes. Five focus groups were conducted. Eight themes emerged, with a total of 18 sub-themes. Themes were: current practice, customization, applicability, team performance, human factors, analogy, incidents and integration of skills. Extent and limitations of the aviation surgery analogy also emerged. The new insights gained through this qualitative analysis highlight the need to tailor aviation-based practices to the operating theatre. To achieve this, we propose the 'aviation bundle' of non-technical skills. This blueprint aims to promote a culture of safety and efficiency in surgical practice and could be developed into a training programme for theatre staff.

Systematic review of methods to quantify teamwork in the operating theatre.

Background Teamwork in the operating theatre is becoming increasingly recognized as a major factor in clinical outcomes. Many tools have been developed to measure teamwork. Most fall into two categories: self-assessment by theatre staff and assessment by observers. A critical and comparative analysis of the validity and reliability of these tools is lacking. Methods MEDLINE and Embase databases were searched following PRISMA guidelines. Content validity was assessed using measurements of inter-rater agreement, predictive validity and multisite reliability, and interobserver reliability using statistical measures of inter-rater agreement and reliability. Quantitative meta-analysis was deemed unsuitable. Results Forty-eight articles were selected for final inclusion; self-assessment tools were used in 18 and observational tools in 28, and there were two qualitative studies. Self-assessment of teamwork by profession varied with the profession of the assessor. The most robust self-assessment tool was the Safety Attitudes Questionnaire (SAQ), although this failed to demonstrate multisite reliability. The most robust observational tool was the Non-Technical Skills (NOTECHS) system, which demonstrated both test-retest reliability (P > 0·09) and interobserver reliability (Rwg = 0·96). Conclusion Self-assessment of teamwork by the theatre team was influenced by professional differences. Observational tools, when used by trained observers, circumvented this.

Evaluation of factors associated with retained surgical sponges in veterinary patients: a survey of veterinary practitioners.

To evaluate factors that could be associated with retained surgical sponges in veterinary patients. A survey was distributed to 322 veterinarians attending a national veterinary conference in the UK. The survey included questions about the staff, scheduling, type of surgical procedure, surgical sponges, methods to track surgical sponges and details of clinical cases with retained surgical sponges. The response rate was 64 of 322 (19%). Lack of designated scheduled time for surgical procedures was reported by 30% of respondents and was variable for 31%. More than half of respondents (66%) had two people involved in each surgical procedure. The majority of respondents sterilised their own surgical sponges (91%) and used non-radiopaque surgical sponges (56%). Sponges were not counted by 27% of respondents and only occasionally by 20%. Sponge count was not recorded by 70% of respondents. The majority (66%) did not use or have a surgical checklist. Lack of awareness of gossypibomas was reported by 11% of respondents. In all, 27% of respondents were aware of at least one case of retained surgical sponge. Of the 17 cases reported, 14 were small animals. The abdomen was the most common anatomical location for retained surgical sponges and followed elective neutering. Despite the low-response rate, our results suggest that methods of surveillance might reduce the incidence of retained surgical sponges. Lack of specifically scheduled time for surgery, few theatre staff and lack of sponge counting and documentation may have contributed to the 17 retained surgical sponge cases reported.

Outcomes of Laparoscopic Donor Nephrectomy in Presence of Double Renal Arteries – An Early Experience in a Developing Country

Introduction Since its description in 1995, Laparoscopic donor nephrectomy has gained widespread acceptance. The presence of two renal arteries in donor can pose a challenge to the surgeon. The multiplicity of donor artery may have an adverse effect not only on safety of donor but also on graft outcomes. However with increased experience and continuous evolution in instruments and surgical techniques, multiple renal arteries in laparoscopic donor nephrectomy are being performed successfully. Team work including donor surgeons, recipient surgeons and theater staff for accomplishment of a successful donor and recipient surgery is essential. Objective To evaluate the outcomes of laparoscopic donor nephrectomy with double renal arteries. Methods Data was retrieved retrospectively from May 2014 to Feb 2017. Patients with double renal artery who underwent laparoscopic donor nephrectomy were evaluated for laterality of side, operation time, ischemia time and hospitals stay. Results A total of 30 patients were included in the study. The male to female ratio was 3.3:1. Two kidneys were of right side. Maximum warm ischemia time recorded was 5 min 5 sec while mean was 193 ± 61 sec. There was no conversion in double renal artery. There was no primary graft failure. Conclusion Outcomes of laparoscopic donor nephrectomy with double renal artery is comparable to laparoscopic donor nephrectomy with single renal artery. There should be no hesitation in performing laparoscopy donor nephrectomy with double renal arteries in experienced surgical hands and can be done in resource poor country.

Staff knowledge of radiation protection in endovascular surgery

Image intensification exposes the endovascular surgery staff to ionizing radiation. The aim of this study was to determine awareness of ionizing radiation risks among personnel working in the endovascular surgery environment and the availability of radiation protection clothes and to propose appropriate corrective measures. This descriptive study was performed in the endovascular operating theatre equipped with a mobile image intensifier unit in La Rabta vascular department in September 2017. We visited the endovascular theatre to identify the availability of radiation protection clothes. We used a questionnaire to identify personnel knowledge about ionizing radiation. We established a global score of knowledge to classify our population. We identified 85 professionals exposed to ionizing radiation. Sixty-four of them (75%) responded to our questionnaire; 65% were male; median age was 34 years (range: 25-61). Endovascular theatre personnel were surgeons (35%), nurses (34%), qualified technicians (18%) and other department employees (13%). The mean global score of knowledge was 8.15/20 (2-18). This score increased significantly with grade and seniority (Kruskal-Wallis test). In the present study, the results indicate insufficiency knowledge about radiation exposure among the endovascular staff and in radioprotection tools availability. In order to minimize all unnecessary radiation, attempts should be made to increase vascular theatre staff knowledge about radiation protection. Safety culture is a referral method to reduce radiation exposure as low as possible.

Staphylococcus aureus and Escherichia coli levels on the hands of theatre staff in three hospitals in Johannesburg, South Africa, before and after handwashing

Hand hygiene is a fundamental component of infection control. Hand contamination with Staphylococcus aureus and Escherichia coli may contribute to infections. To assess the effectiveness of different handwashing methods in reducing the levels of bacterial flora, especially S. aureus and E. coli, on the hands of theatre staff. A cross-sectional study was conducted among 70 staff in surgical theatres of three randomly chosen hospitals in Johannesburg, South Africa. Samples were taken before and after handwashing using the modified glove juice method and the fingernail press technique. Standard microbiological techniques were used to identify bacteria. Descriptive statistics and non-parametric analysis were used to compare the differences between hospitals and to determine the effects of handwashing on microbial flora and skin irritation. S. aureus organisms were isolated in the prewash samples of 29 (41%) and in the postwash samples of 20 (29%) workers. Of the 29 with positive prewash cultures, 19 (65.5%) showed decreased postwash counts, while 10 (34.5%) showed no change or increased counts. Four workers with a negative prewash count had a positive postwash count. No statistical differences were found between postwash counts categorised by the type of cleansing formula used and the washing technique. E. coli organisms were identified in the prewash count of the fingertip press of one worker. Almost half of the theatre staff carried S. aureus isolates on their hands prior to handwashing and approximately one-third after handwashing. Closer monitoring of handwashing techniques should be introduced.

Surgical Capacity at District Hospitals in Zambia: From 2012 to 2016.

Sub-Saharan Africa has one of the highest burdens of surgically treatable conditions in the world and the highest unmet need, especially in rural areas. Zambia is one of the countries in the region taking steps to improve surgical care for its rural populations. To demonstrate changes in surgical capacity in Zambia's district hospitals over a 3-year period and to provide a baseline from which future interventions in surgical care can be assessed. A cross-sectional assessment of surgical capacity, using a modified WHO questionnaire, was administered in first-level hospitals in nine of Zambia's ten provinces between November 2012 and February 2013 and again between February and April 2016. The two assessments allowed measurement of changes in surgical workforce, infrastructure, equipment, drugs and consumables; and numbers of major surgical procedures performed over two 12-month periods prior to the assessments. There was a significant increase, 2013-2016, in number of theatre staff, from 174 (mean 4.4; SD 1.7) to 235 (mean 6; SD 2.9), P = 0.02. However, the percentage of hospitals with functioning anaesthetic machines dropped from 64 to 41%. There was also a drop in hospitals reporting availability of instruments, drugs and consumables from 38 to 24 (97-62%) and from 28 to 24 (72-62%), respectively. The median number of caesarean sections in 2012 was 99 [interquartile range (IQR) 42-187] and 100 (IQR 42-126) in 2015 (P value =0.53). The median number of major surgical procedures in 2012 was 54 (IQR 10-113) and 66 (IQR 18-168) in 2015 (P = 0.45). An increase in the first-level hospital surgical workforce between 2013 and 2016 was accompanied by reductions in essential equipment and consumables for surgery, and no changes in surgical output. Periodic monitoring of resource availability is needed to address shortages and make safe surgery available to rural populations.

Fire in operating theatres: DaSH-ing to the rescue.

Operating theatres are dynamic environments that require multi professional team interactions. Effective team working is essential for efficient delivery of safe patient care. A fire in the operating theatre is a rare but potentially life threatening event for both patients and staff. A rapid and cohesive response from theatre and allied staff including porters, fire safety officer etc is paramount. We delivered a training session that utilised in situ simulation (simulation in workplace). After conducting needs analysis, learning objectives were agreed. After thorough planning, the date and location of the training session were identified. Contingency plans were put in place to ensure that patient care was not compromised at any point. To ensure success, checklists for faculty were devised and adhered to. A medium fidelity manikin with live monitoring was used. The first part of the scenario involved management of a surgical emergency by theatre staff. The second part involved management of a fire in the operating theatre while an emergency procedure was being undertaken. To achieve maximum learning potential, debriefing was provided immediately after each part of the scenario. A fire safety officer was present as a content expert. Latent errors (hidden errors in the workplace, staff knowledge etc) were identified. Malfunctioning of theatre floor windows and staff unawareness about the location of an evacuation site were some of the identified latent errors. Thorough feedback to address these issues was provided to the participants on the day. A detailed report of the training session was given to the relevant departments. This resulted in the equipment faults being rectified. The training session was a very positive experience and helped not only in improving participants' knowledge, behaviour and confidence but also it made system and environment better equipped.

Growing our own theatre staff: Practice development and education.

Royal Bournemouth & Christchurch Hospitals NHS Foundation Trust engaged in a quality improvement project aimed at improving quality and safety in theatres. The improvements delivered were recruitment to full staffing template, reduction in agency staffing to zero, and creating a theatre coordinator role to ensure safe staffing. The Practice Education Team was increased fivefold with no extra investment as a result of these improvements. Student satisfaction results amongst ODPs and nurses have increased alongside staff morale and productivity.

Diathermy smoke shown to be hazardous, so why are we not protecting ourselves?

Diathermy smoke has been studied for over three decades and data has been collected to establish its composition. Although its full structure has not been established, the compounds confirmed pose a health hazard to all exposed. Recommendations suggest that theatre staff need to protect themselves using smoke evacuating systems and masks. This review looks at the compliance of theatre staff within these guidelines and the reasons behind noncompliance.

Extended operating times are more efficient, save money and maintain a high staff and patient satisfaction.

Current public sector austerity measures necessitate efficiency savings throughout the NHS. Performance targets have resulted in activity being performed in the private sector, waiting list initiative lists and requests for staff to work overtime. This has resulted in staff fatigue and additional agency costs. Adoption of extended operating theatre times (0800-1800 hours) may improve productivity and efficiency, with potentially significant financial savings; however, implementation may adversely affect staff morale and patient compliance. A pilot period of four months of extended operating times (4.5 hour sessions) was completed and included all theatre surgical specialties. Outcome measures included: the number of cases completed, late starts, early finishes, cancelled operations, theatre overruns, preoperative assessment and 18-week targets. The outcomes were then compared to pre-existing normal working day operating lists (0900-1700). Theatre staff, patient and surgical trainee satisfaction with the system were also considered by use of an anonymous questionnaire. The study showed that in-session utilisation time was unchanged by extended operating hours 88.7% (vs 89.2%). The service was rated as 'good' or 'excellent' by 87.5% of patients. Over £345,000 was saved by reducing premium payments. Savings of £225,000 were made by reducing privately outsourced operation and a further £63,000 by reviewing staff hours. Day case procedures increased from 2.8 to 3.2 cases/day with extended operating. There was no significant increase in late starts (5.1% vs 6.8%) or cancellation rates (0.75% vs 1.02%). Theatre over-runs reduced from 5% to 3.4%. The 18 weeks target for surgery was achieved in 93.7% of cases (vs 88.3%). The number of elective procedures increased from 4.1 to 4.89 cases/day. Only 13.33% of trainees (n = 33) surveyed felt that extended operating had a negative impact on training. The study concludes that extended operating increased productivity from 2.8 patients per session to 3.2 patients per session with potential savings of just over £2.4 million per financial year. Extrapolating this to the other 155 trusts in England could be a potential saving of £372 million per year. Staff, trainee and patient satisfaction was unaffected. An improved 18 weeks target position was achieved with a significant reduction in private sector work. However, some staff had difficulty with arranging childcare and taking public transport and this may prevent full implementation.

An investigation of barriers to the use of the World Health Organization Surgical Safety Checklist in theatres.

The World Health Organization (WHO) has implemented the Surgical Safety Checklist (SSCL) as part of the Safe Surgery Saves Lives campaign. This is aimed at improving surgical safety worldwide. Despite many perceived benefits of the SSCL, compliance and acceptance in many areas remain poor. To investigate perceptions of theatre staff regarding the checklist and to identify reasons and barriers for poor compliance and implementation. Questionnaires were handed out to theatre teams across all surgical disciplines at two large hospitals in Durban, South Africa, over a 2-week period. Data collected included role in theatre, intention of the SSCL, training received, as well as questions regarding previously identified barriers and staff perceptions. Questionnaires were distributed to 225 practitioners, with a response rate of 81.7% from 51 nurses, 54 anaesthetists and 79 surgeons. Rank of medical staff included 52 seniors (consultants) and 81 juniors (registrars and medical officers). The majority (95%) of respondents perceived the SSCL as intended to improve safety, prevent errors or reduce morbidity and mortality. A total of 146 respondents (79.3%) received no SSCL training. No new barriers were identified, but previously identified barriers were confirmed. Our key factors were time-related issues and lack of buy-in from team members. Surgeons were perceived as being supportive by 45.1% of respondents, in contrast to nurses (62.5%), anaesthetists (70.1%) and management (68.5%). When compared with junior staff, senior staff were 5-fold more likely to feel that staff did not need to be trained and 8-fold more likely to indicate that the checklist did not improve patient safety. The WHO SSCL is an important tool in the operating room environment. The barriers in our setting are similar to those identified in other settings. There needs to be widespread training in the use of the SSCL, including adaptation of the checklist to make it fit for purpose in our setting. Improving use of the checklist will allow theatre staff to work together towards ensuring a safer theatre environment for both patients and staff.

Effect of an exfoliating skincare regimen on the numbers of epithelial squames on the skin of operating theatre staff, studied by surface microscopy

The shedding of epithelial squames (skin scales) by staff in operating theatre air is an important source of deep infection following joint replacement surgery. This is a serious complication, resulting in significant morbidity for the patient and substantial cost implications for healthcare systems. Much effort has been put into providing clean air in operating theatres, yet little attention has been given to reducing the shedding of surface skin scales at source. To develop a novel method for calculating surface skin scale density using surface microscopy, and to use it to evaluate the effect of a skincare regimen on operating theatre staff. Surface microscopy with Z-stacked imaging was used to visualize the effect of a skincare regimen involving three stages: washing with soap; exfoliation; and application of emollient. A USB microscope was then used in a field study to take images of the skin of operating theatre staff who applied the regimen to one lower limb the night before testing. The other limb was used as a control. Two blinded assessors analysed scale density. Z-stack images from the surface microscope enabled observations of the skincare regimen. The USB microscope also provided adequate images that enabled assessment of skin scale density. In the operating theatre staff, a 72.1% reduction in visible skin scales was observed following application of the skincare regimen. Further work is required to demonstrate how this effect correlates with dispersion of skin particles in a cleanroom, and subsequently in live operating theatre studies.