Krishna Moorthy

A surgical safety checklist to reduce morbidity and mortality in a global population.

BACKGROUND Surgery has become an integral part of global health care, with an estimated 234 million operations performed yearly. Surgical complications are common and often preventable. We hypothesized that a program to implement a 19-item surgical safety checklist designed to improve team communication and consistency of care would reduce complications and deaths associated with surgery. METHODS Between October 2007 and September 2008, eight hospitals in eight cities (Toronto, Canada; New Delhi, India; Amman, Jordan; Auckland, New Zealand; Manila, Philippines; Ifakara, Tanzania; London, England; and Seattle, WA) representing a variety of economic circumstances and diverse populations of patients participated in the World Health Organizations Safe Surgery Saves Lives program. We prospectively collected data on clinical processes and outcomes from 3733 consecutively enrolled patients 16 years of age or older who were undergoing noncardiac surgery. We subsequently collected data on 3955 consecutively enrolled patients after the introduction of the Surgical Safety Checklist. The primary end point was the rate of complications, including death, during hospitalization within the first 30 days after the operation. RESULTS The rate of death was 1.5% before the checklist was introduced and declined to 0.8% afterward (P=0.003). Inpatient complications occurred in 11.0% of patients at baseline and in 7.0% after introduction of the checklist (P<0.001). CONCLUSIONS Implementation of the checklist was associated with concomitant reductions in the rates of death and complications among patients at least 16 years of age who were undergoing noncardiac surgery in a diverse group of hospitals.

Practical challenges of introducing WHO surgical checklist: UK pilot experience

The WHO checklist has the potential to reduce preventable adverse events in surgery. But A Vats and colleagues’ experience suggests that a careful and rigorous implementation plan is required to ensure that the checklist is used routinely and correctly

Objective assessment of technical skills in surgery

In the past few years, considerable developments have been made in the objective assessment of technical proficiency of surgeons. Technical skills should be assessed during training, and various methods have been developed for this purpose Surgical competence entails a combination of knowledge, technical skills, decision making, communication skills, and leadership skills. Of these, dexterity or technical proficiency is considered to be of paramount importance among surgical trainees. The assessment of technical skills during training has been considered to be a form of quality assurance for the future.1 Typically surgical learning is based on an apprenticeship model. In this model the assessment of technical proficiency is the responsibility of the trainers. However, their assessment is largely subjective.2 Objective assessment is essential because deficiencies in training and performance are difficult to correct without objective feedback.3 The introduction of the Calman system in the United Kingdom, the implementation of the European Working Time Directive, and the financial pressures to increase productivity4 have reduced the opportunity to learn surgical skills in the operating theatre. Studies have shown that these changes have resulted in nearly halving the surgical case load that trainees are exposed to.5 Surgical proficiency must therefore be acquired in less time, with the risk that some surgeons may not be sufficiently skilled at the completion of training.6 This and increasing attention of the public and media on the performance of doctors have given rise to an interest in the development of robust methods of assessment of technical skills.7 We review the research in this field in the past decade. Our objectives are to explore all the available methods, establish their validity and reliability, and examine the possibility of using these methods on the basis of the available evidence. We collected information for this review from …

Laparoscopic skills training and assessment

The introduction of laparoscopic techniques to general surgery was associated with many unnecessary complications, which led to the development of skills laboratories to train novice laparoscopic surgeons. This article reviews the tools currently available for training and assessment in laparoscopic surgery.

Systems Approaches to Surgical Quality and Safety: From Concept to Measurement

Objective:This approach provides the basis of our research program, which aims to expand operative assessment beyond patient factors and the technical skills of the surgeon; to extend assessment of surgical skills beyond bench models to the operating theater; to provide a basis for assessing interventions; and to provide a deeper understanding of surgical outcomes. Summary Background Data:Research into surgical outcomes has primarily focused on the role of patient pathophysiological risk factors and on the skills of the individual surgeon. However, this approach neglects a wide range of factors that have been found to be of important in achieving safe, high-quality performance in other high-risk environments. The outcome of surgery is also dependent on the quality of care received throughout the patients stay in hospital and the performance of a considerable number of health professionals, all of whom are influenced by the environment in which they work. Methods:Drawing on the wider literature on safety and quality in healthcare, and recent papers on surgery, this article argues for a much wider assessment of factors that may be relevant to surgical outcome. In particular, we suggest the development of an “operation profile” to capture all the salient features of a surgical operation, including such factors as equipment design and use, communication, team coordination, factors affecting individual performance, and the working environment. Methods of assessing such factors are outlined, and ethical issues and other potential concerns are discussed.

Laparoscopic virtual reality and box trainers: is one superior to the other?

Background: Virtual reality (VR) simulators now have the potential to replace traditional methods of laparoscopic training. The aim of this study was to compare the VR simulator with the classical box trainer and determine whether one has advantages over the other. Methods: Twenty four novices were tested to determine their baseline laparoscopic skills and then randomized into the following three group: LapSim, box trainer, and no training (control). After 3 weekly training sessions lasting 30-min each, all subjects were reassessed. Assessment included motion analysis and error scores. Nonparametric tests were applied, and p < 0.05 was deemed significant. Results: Both trained groups made significant improvements in all parameters measured (p < 0.05). Compared to the controls, the box trainer group performed significantly better on most of the parameters, whereas the LapSim group performed significantly better on some parameters. There were no significant differences between the LapSim and box trainer groups. Conclusions: LapSim is effective in teaching skills that are transferable to a real laparoscopic task. However, there appear to be no substantial advantages of one system over the other.

Is minimally invasive surgery beneficial in the management of esophageal cancer? A meta-analysis

IntroductionOpen esophagectomy for cancer is a major oncological procedure, associated with significant morbidity and mortality. Recently, thoracoscopic procedures have offered a potentially advantageous alternative because of less operative trauma compared with thoracotomy. The aim of this study was to utilize meta-analysis to compare outcomes of open esophagectomy with those of minimally invasive esophagectomy (MIE) and hybrid minimally invasive esophagectomy (HMIE).MethodsLiterature search was performed using Medline, Embase, Cochrane Library, and Google Scholar databases for comparative studies assessing different techniques of esophagectomy. A random-effects model was used for meta-analysis, and heterogeneity was assessed. Primary outcomes of interest were 30-day mortality and anastomotic leak. Secondary outcomes included operative outcomes, other postoperative outcomes, and oncological outcomes in terms of lymph nodes retrieved.ResultsA total of 12 studies were included in the analysis. Studies included a total of 672 patients for MIE and HMIE, and 612 for open esophagectomy. There was no significant difference in 30-day mortality; however, MIE had lower blood loss, shorter hospital stay, and reduced total morbidity and respiratory complications. For all other outcomes, there was no significant difference between the two groups.ConclusionMinimally invasive esophagectomy is a safe alternative to the open technique. Patients undergoing MIE may benefit from shorter hospital stay, and lower respiratory complications and total morbidity compared with open esophagectomy. Multicenter, prospective large randomized controlled trials are required to confirm these findings in order to base practice on sound clinical evidence.

A Human Factors Analysis of Technical and Team Skills Among Surgical Trainees During Procedural Simulations in a Simulated Operating Theatre

Background:High-risk organizations such as aviation rely on simulations for the training and assessment of technical and team performance. The aim of this study was to develop a simulated environment for surgical trainees using similar principles. Methods:A total of 27 surgical trainees carried out a simulated procedure in a Simulated Operating Theatre with a standardized OR team. Observation of OR events was carried out by an unobtrusive data collection system: clinical data recorder. Assessment of performance consisted of blinded rating of technical skills, a checklist of technical events, an assessment of communication, and a global rating of team skills by a human factors expert and trained surgical research fellows. The participants underwent a debriefing session, and the face validity of the simulated environment was evaluated. Results:While technical skills rating discriminated between surgeons according to experience (P = 0.002), there were no differences in terms of the checklist and team skills (P = 0.70). While all trainees were observed to gown/glove and handle sharps correctly, low scores were observed for some key features of communication with other team members. Low scores were obtained by the entire cohort for vigilance. Interobserver reliability was 0.90 and 0.89 for technical and team skills ratings. Conclusions:The simulated operating theatre could serve as an environment for the development of surgical competence among surgical trainees. Objective, structured, and multimodal assessment of performance during simulated procedures could serve as a basis for focused feedback during training of technical and team skills.

Dexterity enhancement with robotic surgery

BackgroundThe aim of this study was to quantify the extent of dexterity enhancement in robotic surgery as compared to laparoscopic surgery.MethodsTen surgeons with varying laparoscopic suturing experience were asked to place three sutures on a suture pad. The sutures were placed laparoscopically, robotically with 2-D vision and robotically with 3-D vision. The da Vinci system’s Application Programming Interface (API) was used for positional data. A validated motion analysis system was used for data retrieval for the laparoscopic task. Custom software was developed for data analysis.ResultsCompared to laparoscopic suturing, when the task was undertaken robotically with 2-D vision there was a 20% reduction in the time taken but this was not significant (p = 0.07). There was a 55% reduction in the path traveled by the right hand (p = 0.01) and a 45% reduction in the path traveled by the left hand (p = 0.008). When the task was undertaken robotically with 3-D vision, there was a 40% reduction in the time taken (p = 0.01). There was a 70% reduction in the path traveled by right hand (p = 0.008) and a 55% reduction by the left hand (p = 0.08).ConclusionsThe presence of “wristed” instrumentation, tremor abolition, and motion scaling enhance dexterity by nearly 50% as compared to laparoscopic surgery. 3-D vision enhances dexterity by a further 10–15%. In addition, the presence of 3-D vision results in a 93% reduction in skills-based errors.

The benfits of stereoscopic vision in robotic-assisted performance on bench models

Background: Previous studies have failed to establish clear advantages for the use of stereoscopic visualization systems in minimal-access surgery. The aim of this study was to objectively assess whether stereoscopic visualization improves performance on bench models using the da Vinci robotic system. Methods: Eleven surgeons carried out a series of four tasks. Positional data streamed from the da Vinci system was analyzed by means of a previously validated custom-designed software-package. An independent blinded observer scored errors. Statistical analysis included the Wilcoxon signed rank test. A p < 0.05 was deemed significant. Results: We found significant improvements in all tasks and for all parameters (p < 0.05). In addition, a significantly lower number of errors was scored using the stereoscopic mode as compared to the standard two-dimensional image (p < 0.001). Conclusion: Robotic-assisted performance on bench models is more efficient and accurate using stereoscopic visualization.