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1.
BMC Res Notes ; 16(1): 313, 2023 Nov 05.
Article in English | MEDLINE | ID: mdl-37926836

ABSTRACT

INTRODUCTION: This study investigates the effectiveness of incorporating simulated interactive guidelines in nursing students' performance during disaster situations, compared to routine training. METHOD: This study was a crossover design with pre-and post-tests for two groups. Each group consisted of 60 students selected using the census method. SIG and routine (Face-to-Face) training sessions were conducted as a crossover design. Triage knowledge questionnaires were used in the pretest to assess triage knowledge. An OSCE test was administered in the posttest to assess student performance, followed by a triage skills questionnaire. Both questionnaires were highly reliable, as indicated by Cronbach's alpha coefficients (0.9 and 0.95, respectively). Statistical analysis was performed using SPSS version 26 software at a significance level 0.05. RESULT: The chi-square test showed that the two groups were homogeneous regarding age. Regarding knowledge level, both groups were homogeneous before the intervention (P = 0.99). Nevertheless, the results of the OSCE test showed that the students in Group A had a higher level of skill than the students in Group B (93% versus 70%). Also, 18% of the students in group B had low skills. DISCUSSION: The study found that student outcomes improved in both groups receiving SIG, suggesting that interaction and simulation improve learning. However, gamification is an ideal precursor to learning and not a substitute for education. Therefore, gamification should not be used as a stand-alone teaching method. CONCLUSIONS: The crossover study found that simulators and games should not be considered stand-alone teaching methods but can contribute to learning sustainability when used alongside instruction.


Subject(s)
Disasters , Nurses , Students, Nursing , Humans , Cross-Over Studies , Triage , Clinical Competence
2.
BMC Med Inform Decis Mak ; 23(1): 248, 2023 11 03.
Article in English | MEDLINE | ID: mdl-37924029

ABSTRACT

Smartwatches have become increasingly popular in recent times because of their capacity to track different health indicators, including heart rate, patterns of sleep, and physical movements. This scoping review aims to explore the utilisation of smartwatches within the healthcare sector. According to Arksey and O'Malley's methodology, an organised search was performed in PubMed/Medline, Scopus, Embase, Web of Science, ERIC and Google Scholar. In our search strategy, 761 articles were returned. The exclusion/inclusion criteria were applied. Finally, 35 articles were selected for extracting data. These included six studies on stress monitoring, six on movement disorders, three on sleep tracking, three on blood pressure, two on heart disease, six on covid pandemic, three on safety and six on validation. The use of smartwatches has been found to be effective in diagnosing the symptoms of various diseases. In particular, smartwatches have shown promise in detecting heart diseases, movement disorders, and even early signs of COVID-19. Nevertheless, it should be emphasised that there is an ongoing discussion concerning the reliability of smartwatch diagnoses within healthcare systems. Despite the potential advantages offered by utilising smartwatches for disease detection, it is imperative to approach their data interpretation with prudence. The discrepancies in detection between smartwatches and their algorithms have important implications for healthcare use. The accuracy and reliability of the algorithms used are crucial, as well as high accuracy in detecting changes in health status by the smartwatches themselves. This calls for the development of medical watches and the creation of AI-hospital assistants. These assistants will be designed to help with patient monitoring, appointment scheduling, and medication management tasks. They can educate patients and answer common questions, freeing healthcare providers to focus on more complex tasks.


Subject(s)
Heart Diseases , Medicine , Movement Disorders , Humans , Reproducibility of Results , Health Facilities , Hospitals
3.
Nurse Educ Pract ; 70: 103680, 2023 Jul.
Article in English | MEDLINE | ID: mdl-37354693

ABSTRACT

BACKGROUND: Using simulation in an appropriate education plan which has always been challenging; To be used alone or in combination with other methods and the order of it's use. This article was intended to compare student's knowledge, clinical skill and readiness-capability using simulation and combination of it with traditional training methods to collect necessary evidence for development of an appropriate simulation- based educational plan for surgical technology students. METHODS: This is a controlled pre/post-test quasi-experimental study in 2019. All surgical technology students who had selected the scrub and circulate course (n = 28) were randomly divided into two groups. One of the groups was educated with traditional training method (TTM). On the same day, the other group was educated with simulation training method (STM). After two weeks, group α received simulation training and group ß was subject to traditional training. Multiple-Choice Test for Knowledge Assessment and Clinical Skills as well as Readiness-Capability (KCSRC) of appendectomy Surgery checklist were used in this study. Data were analysed after each training method, after Two weeks and after blended education.For data analysis, Mixed-Design ANOVA and SPSS software 24/v were employed. RESULTS: The mean scores of knowledge, clinical skills, and readiness-capability were 14.2 ± 2.91, 44.42 ± 17.74, 21.58 ± 4.18 in group α and 12.66 ± 3.21, 41.17 ± 16.19, and 18.58 ± 7.85 in group ß, respectively. The comparison between mean scores of KCSRC before the first training and after combined training in each group showed that the mean of all scores significantly increased in group α (p < 0.0001), which indicates that the education plan starting with TTM and continued with STM has the most significant effect on results. CONCLUSION: According to the results of the study, it seems that starting the education plan for surgical students with TTM and then continuing with STM would be more effective on education of students, especially on students' long term learning.


Subject(s)
Education, Nursing, Baccalaureate , Simulation Training , Humans , Clinical Competence , Education, Nursing, Baccalaureate/methods , Educational Measurement , Simulation Training/methods , Students , Technology
4.
Arch Acad Emerg Med ; 11(1): e38, 2023.
Article in English | MEDLINE | ID: mdl-37215232

ABSTRACT

Introduction: Artificial Inteligence (AI) application in emergency medicine is subject to ethical and legal inconsistencies. The purposes of this study were to map the extent of AI applications in emergency medicine, to identify ethical issues related to the use of AI, and to propose an ethical framework for its use. Methods: A comprehensive literature collection was compiled through electronic databases/internet search engines (PubMed, Web of Science Platform, MEDLINE, Scopus, Google Scholar/Academia, and ERIC) and reference lists. We considered studies published between 1 January 2014 and 6 October 2022. Articles that did not self-classify as studies of an AI intervention, those that were not relevant to Emergency Departments (EDs), and articles that did not report outcomes or evaluations were excluded. Descriptive and thematic analyses of data extracted from the included articles were conducted. Results: A total of 137 out of the 2175 citations in the original database were eligible for full-text evaluation. Of these articles, 47 were included in the scoping review and considered for theme extraction. This review covers seven main areas of AI techniques in emergency medicine: Machine Learning (ML) Algorithms (10.64%), prehospital emergency management (12.76%), triage, patient acuity and disposition of patients (19.15%), disease and condition prediction (23.40%), emergency department management (17.03%), the future impact of AI on Emergency Medical Services (EMS) (8.51%), and ethical issues (8.51%). Conclusion: There has been a rapid increase in AI research in emergency medicine in recent years. Several studies have demonstrated the potential of AI in diverse contexts, particularly when improving patient outcomes through predictive modelling. According to the synthesis of studies in our review, AI-based decision-making lacks transparency. This feature makes AI decision-making opaque.

5.
Arch Acad Emerg Med ; 10(1): e77, 2022.
Article in English | MEDLINE | ID: mdl-36426168

ABSTRACT

Introduction: Nurses play an active role in disaster response, and the ability of nurses to appropriately apply management principles during large-scale disasters or mass casualty incidents is of critical importance. This study aimed to compare the effect of game-based Training (GBT) and case-based training (CBT) on nursing students' knowledge and behavioral fluency regarding Crisis and Disaster Management. Methods: This is a quasi-experimental study with a pretest-posttest design. Convenience sampling was used to select third-year nursing students who had completed their clinical clerkship at the time of the study (n=60). In the intervention group, disaster-themed games were used, while in the control group, CBT was used. The emergency and crisis management course consisted of this study's theoretical and clinical training phases. After completion of the theoretical phase (five weeks), the practical part (four weeks) is completed as an internship. The data was collected from the disaster Nurses' Knowledge Questionnaire, demographic survey, and measurement checklists for disasters and crises at five stations. Results: GBT students achieved significantly higher knowledge scores than CBT students after training (p< 0.001). CBT and GBT groups had no significant differences in Objective Structured Clinical Examination (OSCE)1 pretest scores. Posttest1-OSCE2 and posttest2-OSCE3 scores showed significant differences after one week (P < 0.001) and one month (P < 0.001). The mean pretest and posttest1 scores were statistically significant in both groups. A comparison of posttest scores between one month after GBT training (69.03 ± 6.09) and one week after it (69.23 ± 6.14) revealed no statistical significance (p = 0.056). Conclusion: Nursing students' knowledge and behavioral fluency regarding crisis management were more effectively improved by using the disaster and crisis game than by using a case-based method.

7.
Adv Med Educ Pract ; 5: 457-67, 2014.
Article in English | MEDLINE | ID: mdl-25489254

ABSTRACT

Simulation is rapidly penetrating the terrain of health care education and has gained growing acceptance as an educational method and patient safety tool. Despite this, the state of simulation in health care education has not yet been evaluated on a global scale. In this project, we studied the global status of simulation in health care education by determining the degree of financial support, infrastructure, manpower, information technology capabilities, engagement of groups of learners, and research and scholarly activities, as well as the barriers, strengths, opportunities for growth, and other aspects of simulation in health care education. We utilized a two-stage process, including an online survey and a site visit that included interviews and debriefings. Forty-two simulation centers worldwide participated in this study, the results of which show that despite enormous interest and enthusiasm in the health care community, use of simulation in health care education is limited to specific areas and is not a budgeted item in many institutions. Absence of a sustainable business model, as well as sufficient financial support in terms of budget, infrastructure, manpower, research, and scholarly activities, slows down the movement of simulation. Specific recommendations are made based on current findings to support simulation in the next developmental stages.

8.
Simul Healthc ; 7(5): 295-307, 2012 Oct.
Article in English | MEDLINE | ID: mdl-22878583

ABSTRACT

The rapid uptake of simulation-based education has led to the development of simulation programs and centers all around the world. Unfortunately, many of these centers are functioning as localized silos and not taking advantage of the potential for collaboration with other regional centers to promote interprofessional education. In the province of British Columbia (BC), Canada, 38 institutions, including health care authorities, universities, colleges, and other health-related organizations, have participated in assessing the use of simulation in BC and in developing a provincial model that enables collaboration and interprofessional learning at the provincial level.This article describes methods and results of a needs assessment and discusses an interprofessional simulation in health care educational model that provides access for all health care professionals in BC regardless of their geographic location and/or institutional affiliation. We anticipate that this information will be useful to and supportive of others in developing simulation collaborations in their respective regions.


Subject(s)
Computer Simulation/supply & distribution , Cooperative Behavior , Health Personnel/education , Interdisciplinary Communication , Models, Organizational , Needs Assessment/organization & administration , Advisory Committees , British Columbia , Computer Simulation/statistics & numerical data , Humans , Program Development/methods
9.
Surg Innov ; 19(4): 452-9, 2012 Dec.
Article in English | MEDLINE | ID: mdl-22170894

ABSTRACT

BACKGROUND: Assessment of surgical performance is often accomplished with traditional methods that often provide only subjective data. Trainees who perform well on a simulator in a controlled environment may not perform well in a real operating room environment with distractions. This project uses the ideas of dual-task methodology and applies them to the assessment of performance of laparoscopic surgical skills. The level of performance on distracting secondary tasks while trying to perform a primary task becomes an indirect but objective measure of the surgical skill of the trainee. METHODS: Nine surgery residents and 6 experienced laparoscopic surgeons performed 3 primary tasks on a laparoscopic virtual reality simulator (camera position, grasping, and cholecystectomy) while being distracted by 3 secondary tasks (counting beeps, selective responses, and mental arithmetic). Completion time and error rates were recorded for each combination of tasks. RESULTS: When performed separately, time to completion and error rates for primary and secondary tasks were similar for learners and experts. When performing the tasks simultaneously, learners had more errors than experts. Error rates increased for learners when distracting tasks became more difficult or required more attention. Expert surgeons maintained consistent error rates despite the increasing difficulty of task combinations. CONCLUSIONS: The use of dual-task methodology may help trainers to identify which surgical trainees require more preparation before entering the real operating room environment. Expert surgeons are capable of maintaining performance levels on a primary task in the face of distractions that may occur in the operating room.


Subject(s)
Internship and Residency/methods , Laparoscopy/education , Task Performance and Analysis , Cholecystectomy, Laparoscopic , Clinical Competence , Computer Simulation , Computer-Assisted Instruction/methods , Humans , Laparoscopy/instrumentation , Laparoscopy/methods , User-Computer Interface
10.
Simul Healthc ; 6(4): 239-43, 2011 Aug.
Article in English | MEDLINE | ID: mdl-21613969

ABSTRACT

INTRODUCTION: Simulation-based research requires the coordinated effort of research teams to design projects, recruit subjects, and carry out performance assessments of individuals or teams. These efforts can often be labor intensive, time consuming, and logistically challenging, especially in the context of multicenter simulation-based research trials. METHODS: We have developed a multifunctional, internet-based research portal for facilitation of simulation-based research. This free portal, accessible from www.cesei.org, is capable of managing the research process by helping researchers to design their project, setup data collection using customized assessment tools, upload videos for performance assessment, and finally, download data-filled spreadsheets for statistical analysis. RESULTS: The research portal has been used successfully to manage the first major project of the EXPRESS research collaborative, a multicenter research study involving 15 recruitment sites and more than 400 subjects. CONCLUSIONS: The use of the research portal has enabled us to simplify and streamline the management of our multicenter research studies. We envision that this portal will permit novice and expert researchers alike to carry out their simulation-based research projects in a coordinated and time-efficient fashion, thus ultimately helping to enhance their overall research productivity.


Subject(s)
Computer Simulation , Cooperative Behavior , Information Storage and Retrieval , Internet , Pediatrics , Research/organization & administration , Program Development , Research Design
11.
Am J Surg ; 201(5): 673-7, 2011 May.
Article in English | MEDLINE | ID: mdl-21545920

ABSTRACT

OBJECTIVE: Surgeons' vigilance regarding patient condition was assessed using eye-tracking techniques during a simulated laparoscopic procedure. METHODS: Surgeons were required to perform a partial cholecystectomy in a virtual reality trainer (SurgicalSim; METI Inc, Sarasota, FL) while wearing a lightweight head-mounted eye-tracker (Locarna systems Inc, Victoria, British Columbia, Canada). Half of the patients were preprogrammed to present a mildly unstable cardiac condition during the procedure. Surgical performance (evaluated by task time, instrument trajectory, and errors), mental workload (by the National Aeronautics and Space Administration Task Load Index), and eye movement were recorded and compared between 13 experienced and 10 novice surgeons. RESULTS: Experienced surgeons took longer to complete the task and also made more errors. The overall workload reported by surgeons was similar, but expert surgeons reported a higher level of frustration and a lower level of physical demands. Surgeon workload was greater when operating on the unstable patient than on the stable patient. Novices performed faster but focused more of their attention on the surgical task. In contrast, experts glanced more frequently at the anesthetic monitor. CONCLUSIONS: This study shows the usefulness of using eye-tracking technology to measure a surgeon's vigilance during an operation. Eye-tracking observations can lead to inferences about a surgeon's behavior for patient safety. The unsatisfactory performance of expert surgeons on the VR simulator suggests that the fidelity of the virtual simulator needs to improve to enable surgeons to transfer their clinical skills. This, in turn, suggests using caution when having clinical experts as instructors to teach skills with virtual simulators.


Subject(s)
Arousal/physiology , Attention/physiology , Cholecystectomy, Laparoscopic/instrumentation , Computer Simulation , Eye Movements/physiology , Operating Rooms/supply & distribution , Adult , Equipment Design , Humans , Task Performance and Analysis
12.
Stud Health Technol Inform ; 163: 743-8, 2011.
Article in English | MEDLINE | ID: mdl-21335892

ABSTRACT

Endoscopic surgery performed through patients' natural orifices (NOTES procedures) often require some degree of retroflexion of the operating system. This can cause a misalignment between the displayed image and the actual work plane, leading to performance difficulties. This study investigated the impact of retroflexion on task performance in a simulated environment. Surgeons were required to perform an aiming and pointing task under two experimental conditions: forward-view vs. retroflexed-view. Results showed that both expert and novice surgeons required significantly longer time for completing the task when the scope was retroflexed, compared to when the scope faced forwards. Results address the importance of careful selection of the surgical approach to avoid image retroflexion. Further analysis revealed that the novices were more vulnerable than experts to image distortion with the retroflexed view. This addresses the necessity for surgeons to go through extensive endoscopic training to overcome the visual-motor challenges before they can perform NOTES procedures safely and effectively.


Subject(s)
Endoscopy/methods , Imaging, Three-Dimensional/methods , Task Performance and Analysis , Telemedicine/methods , User-Computer Interface , Visual Perception/physiology
13.
J Invest Surg ; 23(1): 48-56, 2010 Feb.
Article in English | MEDLINE | ID: mdl-20233005

ABSTRACT

Simulation is considered to be a paradigm shift in surgical education and skills acquisition. Today simulation is accepted to be a new concept not only for Surgery but also for the entire health education. This paper aims to improve the awareness of simulation technology and is to assist those individuals and institutions who are in the process of building a simulation centre or envisioning the formation of a simulation program in their future endeavors. The author shares his experience with the medical community and provides information to access other resources in support of simulation programs.


Subject(s)
Clinical Competence , Computer Simulation , Computer-Assisted Instruction , General Surgery/education , Schools, Medical/organization & administration , British Columbia , Curriculum , Humans , Learning , Schools, Medical/classification , Software
14.
Crit Care Med ; 38(3): 766-70, 2010 Mar.
Article in English | MEDLINE | ID: mdl-20068462

ABSTRACT

OBJECTIVE: To evaluate the impact of prolonged continuous wakefulness on resident performance under controlled experimental conditions. DESIGN: Experimental within-subjects comparison. SETTING: High-fidelity patient simulator. PARTICIPANTS: Twelve residents in an Internal Medicine Program at various stages of training (range, 1-35 mos). MEASUREMENTS: Performance was studied during 26 hrs of continuous wakefulness at four time points (8:00-10:00 am, 2:00-4:00 pm, 2:00-4:00 am, and 8:00-10:00 am the next day) using high-fidelity patient simulation. At each session, residents managed eight simulated dysrhythmias according to advanced cardiac life support protocols (advanced cardiac life support scenarios) and then managed a simulated critically ill patient (e.g., patient with meningitis) to test more complicated clinical decision-making (complex scenario). The frequency of previously defined major medical errors (i.e., action or inaction that likely would have resulted in significant harm in a real patient) was assessed by a scorer blinded to the time of the session. For each complex scenario, a global score between 0 and 100 was also given for overall performance. The impact of wakefulness on performance was assessed by using longitudinal mixed-effects models. RESULTS: For the complex scenarios, the mean number of errors increased from 0.92 +/- 0.90 in the first session to 1.58 +/- 0.79 in the fourth session (p = .09), and mean global score decreased from 56.8 +/- 14.6 to 49.6 +/- 12.6 (p = .02). For the advanced cardiac life support scenarios, the mean number of major errors committed in the advanced cardiac life support scenarios decreased during the study period (p = .01). However, essentially all of the improvement occurred between the first and second time points, suggesting that a substantial learning effect accounted for the findings. CONCLUSIONS: During prolonged continuous wakefulness of medical residents, clinical performance in the management of a simulated critically ill patient deteriorates. The practice of scheduling residents for extended work shifts (>24 hrs) should be reconsidered.


Subject(s)
Clinical Competence/standards , Computer Simulation , Intensive Care Units , Internal Medicine/education , Internship and Residency/standards , Manikins , Medical Errors/statistics & numerical data , Sleep Deprivation/psychology , Wakefulness , Work Schedule Tolerance , British Columbia , Critical Care/standards , Critical Illness/therapy , Hospitals, University , Humans , Medical Errors/prevention & control , Quality Assurance, Health Care/standards , Statistics as Topic
15.
Surg Endosc ; 23(10): 2181-90, 2009 Oct.
Article in English | MEDLINE | ID: mdl-19116747

ABSTRACT

BACKGROUND: Methods for evaluating standard skills in the operating room typically are based on direct observation and checklists, but such evaluations are time consuming and can be subject to bias. It often is possible to acquire more objective measurements using surgical simulators. However, motor performance in simulators can differ significantly from that in the operating room. Intraoperative assessment is particularly challenging because of the significant variability between procedures related to differences in the patients, the surgical setup, and the team. This study aimed to evaluate the feasibility of using a new framework for interpreting quantitative measures acquired in the operating room to distinguish between levels of laparoscopic skill development. METHODS: Two levels of surgical skill development were observed, namely, those of three fourth-year residents and three attending surgeons performing three laparoscopic cholecystectomies each. Electromagnetic position sensors were attached by the surgeons to a 5-mm curved dissector and a 5-mm atraumatic grasper. From the tools' position histories and video recordings, time, kinematics, and movement transition measures were extracted. Various measures such as the Kolmogorov-Smirnov statistic and the Jensen-Shanon Divergence were used to provide intuitive dimensionless difference measures ranging from 0 to 1. These scores were used to compare residents and expert surgeons executing two surgical tasks: exposure of Calot's triangle and dissection of the cystic duct and artery. RESULTS: The two groups could be clearly differentiated in both tasks during monitoring for the dominant hand (analysis of variance [ANOVA] and Mann-Whitney; p < 0.05) but not for the nondominant hand. CONCLUSIONS: It is practical to acquire time, kinematic, and movement transition measures intraoperatively using video and electromagnetic position-sensing technologies. Principal component analysis proved to be a useful technique for presenting differences between skill levels based on those measures. The authors conclude that objective assessment of intraoperative surgical motor behavior is feasible and likely practical.


Subject(s)
Cholecystectomy, Laparoscopic/standards , Clinical Competence , Monitoring, Intraoperative/instrumentation , Psychomotor Performance , Analysis of Variance , Biomechanical Phenomena , Computer-Assisted Instruction , Education, Medical, Graduate , Educational Measurement , Electromagnetic Fields , Humans , Internship and Residency , Kinetics , Statistics, Nonparametric , Video Recording
16.
Stud Health Technol Inform ; 125: 85-90, 2007.
Article in English | MEDLINE | ID: mdl-17377240

ABSTRACT

The objective of this paper is to present the initial results of a study aimed at showing the feasibility of using kinematic measures to distinguish skill levels in manipulating surgical tools. Through a simulated surgical task (dissection of a mandarin orange), we acquired motor performance data from three sets of subjects representing different stages of surgical training. We computed the average lateral, axial and vertical tooltip velocities for each of the two main subtasks ('Peel Skin' and 'Detach Segment'). For each subject, we defined a 6-element vector to describe the kinematic measures extracted from the two tasks and used Principal Components Analysis (PCA) to extract the two dominant contributors to overall variability to simplify the presentation of the data to the trainer. We found that the first two principal components accounted for approximately 90% of the variance across all subjects and tasks. Moreover, the PCA plot showed good intrasubject repeatability, consistency within subjects with similar levels of training, and good separation between the subject groups. The results of this pilot study will allow us to design a future intraoperative study.


Subject(s)
Clinical Competence , Computer Simulation , Laparoscopy/standards , Biomechanical Phenomena , General Surgery/education , Humans , Motor Skills
17.
Surg Innov ; 13(2): 120-8, 2006 Jun.
Article in English | MEDLINE | ID: mdl-17012153

ABSTRACT

Surgical education has always been challenging and is being made more difficult with the changes in the surgical environment. In the past decade, the number of patients available for educational purposes has decreased because of the development of technology that has significantly reduced their time of stay in the hospital and has also moved many surgical procedures to ambulatory services. Technologic advances also create the demand for more specialized training. The increased number of undergraduate, postgraduate students, and clinical fellows has also affected the educational mandate of the academic hospitals. Alternative ways to teach medicine, and especially surgery, are becoming inevitable. One such method is to teach students outside the operating room in a simulated environment. This article reports on the developments of surgical education centers and provides guidance for those who might wish to develop such educational facilities. For further information, visit www.cesei.org.


Subject(s)
Academic Medical Centers/organization & administration , Education, Medical/organization & administration , General Surgery/education , Problem-Based Learning/methods , Humans
18.
Stud Health Technol Inform ; 119: 108-13, 2006.
Article in English | MEDLINE | ID: mdl-16404027

ABSTRACT

The objective of this paper is to present the development of a new modelling diagram (MCMD) to represent MIS procedures in terms of both motor and cognitive actions. Through observation and analysis of several laparoscopic cholecystectomy procedures and based on task analysis techniques, we created a diagram language composed of six primary symbols: processes, decisions, interrupt service routines (ISRs), options points and AND and OR gates. We then tested and refined them during 10 new cases until no further changes seemed necessary, we have since applied this approach to 6 laparoscopic colorectal surgeries and have found that no further symbols were necessary though the procedural representation was naturally different. This modelling diagram allowed us to represent both cognitive and motor performance aspects of surgical procedures in a unified framework and will in future allow us to assess motor performance on particular surgical tasks at particular points in the procedure (i.e., the surgical context).


Subject(s)
Computer Simulation , Minimally Invasive Surgical Procedures/education , Psychomotor Performance , Humans
19.
J Invest Surg ; 15(1): 29-35, 2002.
Article in English | MEDLINE | ID: mdl-11931491

ABSTRACT

Histological examination of acute lung injury associated with sepsis often revealed thromboembolic lesions in the pulmonary microcirculation. Several inflammatory mediators such as platelet activating factor, thromboxane, and endothelins have also been implicated in the pathogenesis of acute pulmonary thromboembolism (APTE). In the present study we examined the roles of three proinflammatory cytokines, tumor necrosis factor-alpha (TNF-alpha), interleukin 1beta (IL-1beta), and IL-8, in the early phase of APTE. APTE was induced in 13 anesthetized piglets (22+/-4 kg) by injecting thrombin-induced blood clots directly into the left lower lobar pulmonary artery. Five animals that received only warm sterile saline served as controls. Arterial plasma samples were collected regularly over 8 h so that cytokine levels could be measured later by enzyme-linked immunosorbent assay (ELISA). Administration of clots doubled the mean pulmonary arterial pressure (from 13+/-5 to 26+/-7 mm Hg) and caused significant decrease in arterial oxygen tension (PaO2 from 390+/-85 to 256+/-89 mm Hg while the FiO2 was maintained at 1.0). Mean arterial blood pressure and cardiac output remained comparable throughout the experiments after initial fluid resuscitation. Plasma levels of TNF-alpha, IL-1beta, and IL-8 were not significantly increased in the APTE group when compared with their baseline values or the control group. Our results thus show that APTE is associated with pulmonary hypertension and deterioration of gas exchange but not with the systemic release of TNF-alpha, IL-1beta, or IL-8. We conclude that these cytokines have minimal impact on the systemic circulation during APTE.


Subject(s)
Interleukin-1/metabolism , Interleukin-8/metabolism , Pulmonary Embolism/physiopathology , Tumor Necrosis Factor-alpha/metabolism , Animals , Enzyme-Linked Immunosorbent Assay , Hemodynamics/physiology , Swine
20.
Stud Health Technol Inform ; 85: 280-6, 2002.
Article in English | MEDLINE | ID: mdl-15458102

ABSTRACT

Quantitative performance and skill assessments are critical for evaluating the progress of surgical residents and the efficacy of different training programs. Current evaluation methods are subjective and potentially unreliable, so there is a need for objective methods to evaluate surgical performance. We identify a feasible method to measure kinematic data in the live operating room setting and to assess the repeatability of an analysis method based on a hierarchical decomposition of surgical tasks. We used an optoelectronic motion analysis system to acquire postural data and tool tip trajectories of one expert surgeon over a period of four months. To assess repeatability of performance measures, we created a hierarchical decomposition diagram describing the procedure in terms of surgical tasks, tool sequences and fundamental tool actions. From the kinematic data, we extracted characteristic measures of individual tool actions and compared these measured distributions using the Kolmogorov-Smirnov statistic. The comparisons of distributions show consistent performance over time by a trained surgeon and little effect from patient variability, and so are likely reliable measures of performance. An expanded set of reliable kinematic measures will form the basis for quantifying surgical skill and should be useful in validating surgical simulations for use in training, certifying surgeons and designing and evaluating new surgical tools.


Subject(s)
Biomechanical Phenomena/statistics & numerical data , Cholecystectomy, Laparoscopic/education , Clinical Competence/statistics & numerical data , Internship and Residency , Electronic Data Processing , Feasibility Studies , Humans , Mathematical Computing , Psychomotor Performance , Reproducibility of Results , Video Recording
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