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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Orthopaedic surgical skills: examining how we train and measure performance in wire navigation tasks

Long, Steven A. 01 May 2019 (has links)
Until recently, the model for training new orthopaedic surgeons was referred to as “see one, do one, teach one”. Resident surgeons acquired their surgical skills by observing attending surgeons in the operating room and then attempted to replicate what they had observed on new patients, under the supervision of more experienced surgeons. Learning in the operating is an unideal environment to learn because it adds more time to surgical procedures and puts patients at an increased risk of having surgical errors occur during the procedure. Programs are slowly beginning to switch to a model that involves simulation-based training outside of the operating room. Wire navigation is one key skill in orthopaedics that has traditionally been difficult for programs to train on in a simulated environment. Our group has developed a radiation free wire navigation simulator to help train residents on this key skill. For simulation training to be fully adopted by the orthopaedic community, strong evidence that it is beneficial to a surgeon’s performance must first be established. The aim of this work is to examine how simulation training with the wire navigation simulator can be used to improve a resident’s wire navigation performance. The work also examines the metrics used to evaluate a resident’s performance in a simulated environment and in the operating room to understand which metrics best capture wire navigation performance. In the first study presented, simulation training is used to improve first year resident wire navigation performance in a mock operating room. The results of this study show that depending on how the training was implemented, residents were able to significantly reduce their tip-apex distance in comparison with a group that had received a simple didactic training. The study also showed that performance on the simulator was correlated with performance in this operating room. This study helps establish the transfer validity of the simulator, a key component in validating a simulation model. The second study presents a model for using the simulator as a platform on which a variety of wire navigation procedures could be developed. In this study, the simulator platform, originally intended for hip wire navigation, was extended and modified to train residents in placing a wire across the iliosacral joint. A pilot study was performed with six residents from the University of Iowa to show that this platform could be used for training the other applications and that it was accepted by the residents. The third study examined wire navigation performance in the operating room. In this study, a new metric of performance was developed that measures decision making errors made during a wire navigation procedure. This new metric was combined with the other metrics of wire navigation performance (tip-apex distance) into a composite score. The composite score was found to have a strong correlation (R squared = 0.79) with surgical experience. In the final study, the wire navigation simulator was taken to a national fracture course to collect data on a large sample of resident performance. Three groups were created in this study, a baseline group, a group that received training on the simulator, and a third group that observed the simulator training. The results of this study showed that the training could improve the overall score of the residents compared to the baseline group. The overall distribution from resident performance between groups also shows that a large portion of residents that did not receive training came in below what might be considered as competent performance. Further studies will evaluate how this training impacts performance in the operating room.
232

Decreasing Surgical Site Infections in Vascular Surgery Patients

Little, Charlene Knight 01 January 2016 (has links)
Postoperative surgical site infections are common complications in the operating room. Infections prolong hospital stays, heighten costs, and increase morbidity and mortality. The purpose of this evidence-based quality improvement project was to develop policy, program, and practice guidelines to prevent surgical site infections in vascular surgery patients. Rosswurm and Larrabee's change model was used to develop materials using the best evidence for the recommended practice changes. The Plan, Do, Check, Act model was selected to guide quality improvement. The project goal was to decrease the surgical site infection rate to below the national average. Products of the project include policy, protocol, and practice guidelines developed based on recommended practices of the Association of periOperative Registered Nurses and current peer-reviewed literature. An interdisciplinary project team of institutional stakeholders was used to insure context-relevant operationalization of the evidence in practice. The team was assembled, led in a review of relevant literature, and convened regularly until project products were finished. Three scholars with expertise in the content area were then identified by the project team and asked to validate the content of developed products. Products were revised according to expert feedback. Implementation and evaluation plans were developed by the project team to provide the institution with all necessary process details to carry out the practice change. The evaluation plan advises using a retrospective chart review to compare rates of infection between patients receiving chlorhexidine skin preparation with showers and preoperative chlorhexidine cloths alone. A positive outcome could contribute to positive social change by decreasing preventable infections.
233

Preoperative Chlorhexidine Skin Preparation for Patients Undergoing Vascular Surgery

Duquette, Janine Lee-Anne 01 January 2017 (has links)
In response to improving quality patient care, combined with the growing rates of surgical site infections (SSIs) in vascular patients, the need to explore current practice trends with current evidence has been identified. SSIs affect quality patient care and compromise patient safety. Empirical evidence has recommended the use of a chlorhexidine wash preoperatively to reduce SSIs. Despite this recommended practice, vascular patients were not receiving it in their routine plan of care within a hospital organization in southern Ontario. Guided by Lewin's theory of planned change, this project explored how the planning of a chlorhexidine preoperative surgical skin preparation protocol impacted progress toward improved care of vascular patients. The project was designed as a quality improvement project examining approximately 110 vascular surgical procedures over a 1-month period and staff surveys that were provided to staff in the preoperative (n = 88), same day surgery (n = 68), and inpatient (n = 47) units. These data were analyzed and demonstrated a reduction in vascular SSIs from 4.9% pre-implementation to 2.8% 1-month post-implementation. Major themes generated from the staff surveys demonstrated the nursing staff had a good understanding of the content that was presented in the in-service provided. These findings have implications for social change by highlighting the benefits of incorporating evidence in to practice and further informing the preoperative practice in other surgical specialties.
234

Risk factors and outcomes associated with surgical site infections after craniotomy and craniectomy

Chiang, Hsiu-Yin 01 July 2012 (has links)
Few investigators have used robust analytic methods to assess risk factors and outcomes for surgical site infections (SSIs) after craniotomy and craniectomy (CRANI) procedures. We performed a retrospective study among patients undergoing CRANI procedures between 2006 and 2010 at the University of Iowa Hospitals and Clinics (UIHC) to assess the effect of an intervention (e.g., limiting Gliadel wafer use among patients with malignant brain tumors) on the trend of SSI rates, to identify independent risk factors for SSIs, and to evaluate one-year postoperative patient outcomes associated with these SSIs. We abstracted demographic data and clinical data from medical records or from the UIHC's Health information Management System. We identified 104 patients with SSIs and selected 312 controls. Of SSIs, 88% were deep incisional or organ space infections, 70% were identified after patients were discharged from their initial hospitalizations, 32% were caused by Staphylococcus aureus alone or in combination with other organisms, and 27% were caused by Gram-negative organisms alone or in combination with other organisms. Significant independent risk factors for SSIs were: previous chemotherapy (odds ratio [OR], 10.0; 95% confidence interval [CI] 1.1, 92.1), preoperative length of stay ≥ 1 day (OR, 2.1; 95% CI 1.3, 3.5), preoperative serum glucose ≥ 100 mg/dL (OR, 1.7; 95% CI, 1.0, 3.0), Gliadel® wafer use (OR, 8.6; 95% CI 3.2, 23.1), and postoperative cerebrospinal fluid leak (OR, 4.0; 95% CI, 1.6, 10.3). Gliadel® wafer use was the strongest risk factor; however, limiting Gliadel® wafer use did not decrease SSI rate significantly among patients with brain tumors. Perioperative ventricular drains or lumbar drains were not independently associated with an increased risk of SSIs, but drains may have clinical significance. An SSI risk index that included the significant preoperative patient-related risk factors had a better predictive power than the National Healthcare Safety Network (NHSN) risk index. After adjusting for preoperative length of stay, age, comorbidity score, severity of illness score, the reason for the procedure, and procedure month, patients with SSIs were hospitalized longer postoperatively than were controls during their readmissions (2.3 days; P < 0.0001). After controlling for the same covariates and treating SSI as a time-varying factor, patients with SSIs were more likely than controls to: die (hazard ratio [HR], 3.3; 95% CI, 1.8, 5.8), be readmitted (HR, 4.1; 95% CI, 2.9, 5.8), and have reoperations (HR, 56.6; 95% CI, 38.1, 84.0). In conclusion, surgeons could predict patients' risk of SSIs based on their preoperative risk factors and surgeons could modify some processes of care to lower the SSI risk. Preventing SSIs after CRANI procedures could improve patient outcomes and decrease healthcare utilization.
235

Risk factors for Staphylococcus aureus surgical site infections following breast operations

O'Neill, Elaina Rose 01 May 2016 (has links)
Background. Surgical site infections (SSIs) cause many adverse outcomes for patients including increased length of hospital stay, hospital costs, morbidity, and psychological distresses. Staphylococcus aureus is one of the most common causes of SSIs in the United States. Objective. Identify risk factors for Staphylococcus aureus SSIs following breast operations. Design. Retrospective nested case-control study of SSIs among women undergoing breast operations. Setting. An academic health center. Patients. We studied patients undergoing breast operations at the University of Iowa Hospitals and Clinics from 7/1/2004 through 9/30/2015. Cases were patients who acquired SSIs meeting the National Healthcare Safety Network definition and whose SSIs were caused by S. aureus. We randomly selected two controls for each case from patients who had breast operation during the study period and did not meet the SSI definition. Controls were selected randomly from uninfected patients whose operations occurred during the same month and year as a case. Results. Forty two (1.2%) patients acquired S. aureus SSIs after 3494 breast operations. SSIs were identified a mean of 27.8 days after the breast operations; 54.76% were deep incisional infections. Poisson regression analysis revealed that S. aureus SSIs following breast operations at UIHC have been increasing at a statistically significant rate. Bivariable analysis identified several patient and procedure related risk factors that increased the risk for S. aureus SSIs. Patient-related factors included a diabetes mellitus, active skin disease, prior chemotherapy, breast cancer, hypertension, and preoperative hemoglobin. Procedure-related factors included ASA score > 2, a mastectomy followed by immediate reconstruction, sentinel lymph node biopsy (SLN), drain placement, procedure time, and estimated blood loss. A multivariable analysis of patient factors found only breast cancer maintained significance. A similar analysis of procedure factors found that drain placement remained significant. The combined model contained breast cancer, drain placement, and mastectomy followed by immediate reconstruction as significant variables. Conclusions. S. aureus SSIs following breast operations have been increasing at UIHC. Possible remediable risk factors include blood glucose levels, blood pressure, timing of chemotherapy, and drain placement and care. These results will help doctors at UIHC design interventions to prevent S. aureus SSIs following these procedures.
236

Objective measures of operating room wire navigation performance

Taylor, Leah Kristine 01 May 2016 (has links)
There is no widely accepted tool to assess an orthopedic surgeon’s technical skill in the operating room. With changes in surgical education, simulators are being investigated for learning and assessing technical skills, but a link between the actual operating room is needed to ensure they are effective. Hip fracture surgery is a good starting point to develop these measures because hip fractures are common and fixation is a difficult task. Resident orthopedic surgeons wore a head-mounted video camera during hip fracture surgery. Data collected included: duration, number of x-ray images, the supervising surgeon intervention, and tip-apex distance (TAD, a measure of how accurate the implant is placed). To determine the reliability of these measurements, four raters performed them for two cases. Ten raters measured the tip-apex distance (TAD) on 7 cases. These performance metrics for 15 cases were compared to experience of the residents, both point in residency and number of previous cases. A composite performance score was computed using the four metrics. The metrics were also compared to two practicing surgeons’ assessment of skill. The inter-rater reliability of the performance metrics was high (0.97-0.99) showing these measures are consistent between different raters and useful for assessment. There was a significant relationship between resident experience and the metrics of duration and TAD. Expert opinion was related to duration. These metrics provide objective assessment of resident technical performance in the operating room by a non-expert, an important step towards competency based education. Their validity is shown with correlation to surgical experience.
237

Critical factors that influence staff retention in an acute perioperative environment

McClelland, Beverley Unknown Date (has links)
There are a number of factors recognised as significant for nursing staff retention. These include, a lack of organisational care, bullying (commonly referred to as horizontal violence), and high workload acuity. However, there does not appear to be any indication that these factors influence the retention of nurses within the speciality of acute perioperative nursing. A descriptive study using postpositivist methodology and triangulation of methods was designed to answer the question: What are the critical factors that influence staff retention in an acute perioperative environment? Forty-eight (n = 48) perioperative nurses answered a questionnaire in relation to individual needs, provision of nursing care and administration and management. Four (n = 4) nurses subsequently participated in a focus group interview that explored in more depth, the survey data related to the following characteristics: Educational opportunities; Level of workload acuity; Rostering flexibility; Management; Established policies/Quality assurance; Graduate orientation programs and Professional relationships in an acute perioperative setting. Data analysis revealed that > 90% of respondents agreed that these characteristics are important for job satisfaction and influence staff retention in an acute perioperative environment. A sense of belonging appears to be the most important theme that emerged from the qualitative data. Job satisfaction and staff retention are attained when nurses have a sense of belonging in the workplace. To achieve these, nurses need to identify barriers, develop their communication and leadership skills and determine the ideal professional practice model. The themes (Figure 5), "Finding time" and increased "sick leave", in relation to workload acuity are new findings that provide a platform for future research.
238

Estimation of a lower bound for the cumulative incidence of failure of female surgical sterilisation in NSW: a population-based study.

Churches, Timothy January 2007 (has links)
MPhilPH / Female tubal sterilisation, often referred to as "tubal ligation" but more often performed these days using laparoscopically-applied metal clips, remains a popular form of contraception in women who have completed their families. A review of the literature on the incidence of failure of tubal sterilisation found many reports of case-series and small clinic-based studies, but only a few larger studies with good epidemiological designs, most recently the US CREST study conducted during the 1980s and early 1990s. The CREST study reported a conditional (life-table) cumulative incidence of failure of 0.55, 0.84, 1.18 and 1.85 per 100 women at 1, 2, 4 and 10 years of follow-up respectively. The study described here estimated a lower bound for the incidence of tubal sterilisation failure in NSW by probabilistically linking routinely-collected hospital admission records for women undergoing sterilisation surgery to hospital admission records for the same women which were indicative of subsequent conception or which represented censoring events such as hysterectomy or death in hospital. Data for the period July 1992 to June 2000 were used. Kaplan-Meier and proportional-hazards survival analyses were performed on the resulting linked data set. The conditional cumulative incidence per 100 women at 1, 2 4 and 8 years of follow-up was estimated to be 0.74 (95% CI 0.68-0.81), 1.05 (0.97-1.13), 1.33 (1.23-1.42) and 1.51 (1.39-1.62) respectively. Forty percent of failures ended in abortion and 14% presented as ectopic pregnancies. Age, private health insurance status and sterilisation in a smaller hospital were all found to be associated with lower rates of failure. Strong evidence of time-limited excess numbers of failures in women undergoing surgery in particular hospitals was also found. The study demonstrates the feasibility of using linked, routinely-collected health data to evaluate relatively rare, long-term outcomes such as sterilisation failure on a population-wide basis.
239

Evaluation of a program implemented to reduce surgical wound infection in an acute care hospital in India: A clinical practice improvement project

January 2004 (has links)
This research project investigated the impact of an action research intervention implemented to reducing surgical wound infection in one of the acute care hospitals in India. The study aimed to develop and implement a clinical practice improvement program in reducing surgical wound infection by improving the hand washing and wound dressing practices of nurses. The study also aimed to identify the important contributing factors to a model that predicts surgical wound infection. Pre-post evaluation measures were taken to compare the results of surgical wound infection rate before and after the implementation of the intervention. Surgical wounds of two thousand patients (one thousand before the intervention and another one thousand after) were assessed to determine the wound infection rate and severity of wound infection. The hand washing and wound dressing practices of forty nurses were observed. These same nurses were involved in the intervention using a participatory action research process. The results of the study suggest that there was a marked, significant reduction in the rate and severity of wound infection following the implementation of the intervention. By increasing the hand washing facilities in the ward, educating nurses on the importance of better hygiene, pre-operative shaving and post-operative wound care, the hand washing and wound dressing practices of nurses improved considerably. These improvements resulted in a reduction in the number and severity of patients' surgical wound infections. The study also examined the contribution of different factors to surgical wound infection in a Indian hospital. Significant predictive factors were the patients' age, longer pre-operative hospital stay, extended pre-operative shaving time before surgery, wound class, and co-morbidity of the patient. The identification of risk factors that contributed to increased surgical wound infection for example pre-operative skin preparation, pre-operative hospital stay of the patient would help in taking appropriate measures at the ward level and organisation as a whole. Nosocomial infections extends to an unnecessary lengthy hospital stay, additional treatment increased mortality and morbidity, and increased cost to the patients and the nation as a whole. This project proved that educational mentoring, data surveillance processes and involving the nurses in an action research process were effective in enabling participants to improve their clinical practice and thereby reduce the incidence of patients' surgical wound infections. Establishing infection control teams, ongoing surveillance and feedback to staff of nosocomial infection rates is an urgent need in all Indian hospitals. Organisational management, as a priority, need to provide funding and staff dedicated to undertaking this essential work. Health care professionals can no longer plead ignorance of a situation for which all have a moral and professional responsibility.
240

Personers erfarenheter av kost- och motionsvanor före respektive efter kirurgisk behandling mot fetma

Stenemar, Åsa, Lundberg, Sofie January 2010 (has links)
<p>Syftet med denna studie var att beskriva personers erfarenheter av sina kost- och motionsvanor före respektive efter en kirurgisk behandling mot fetma. Vidare var syftet att beskriva om personerna ansåg att operationen påverkat deras psykiska och fysiska hälsa. Kirurgiska behandlingar mot fetma har ökat under de senaste åren och forskning visar att det är den metod som ger bäst effekt för att behålla en långvarig viktnedgång i jämförelse med diverse dieter och fysisk aktivitet. En kvalitativ metod med innehållsanalyser användes där fem kvinnor som genomgått en operation mot fetma intervjuades. Kategorier har skapats utifrån hur det har sett ut före och efter operationen när det gäller kost- och motionsvanor samt psykisk och fysisk hälsa. Resultatet visade att kostvanorna hos alla deltagare före operation var oregelbundna där det mesta av maten intogs på kvällarna. Motion utövades i regel inte alls av de flesta deltagarna. Efter operation har samtliga regelbundna kostvanor och äter små portioner. Motionsvanorna har förändrats i den mån att fler promenader utförs men i övrigt ingen ökad fysisk aktivitet. Den psykiska hälsan har förbättrats för de flesta genom bättre självförtroende och ökad livskvalitet. Även den fysiska hälsan har förbättrats då deltagarna upplever mer ork och färre besvär med bland annat värk och högt blodtryck. Slutsatserna från studien är att kost- och motionsvanor förändrats men endast i viss utsträckning, däremot har den fysiska och psykiska hälsan förändrats till det bättre.</p> / <p>The purpose of this study is to describe how people who have undergone surgical treatment for obesity experience their diet and exercise habits before and after surgery. Furthermore, it intends to describe if the participants believe that the operation affected their mental and physical health. Surgical treatments for obesity has become more popular in recent years and research shows that it is the method most effective for maintaining weight loss in comparison with various diets and physical activities. A qualitative method with content analysis was used and five women who had surgery for obesity participated. The results showed that the dietary habits of all participants before surgery was irregular and the participants all ate large meals in the evenings. Exercising in general did not exist among the participants. After surgery, all participants had a regular diet and ate smaller portions. Exercise habits have changed to the extent that all take more walks but otherwise they have not increased their physical activity. Mental health has improved for most through better self-esteem and quality of life. Physical health has improved and the participants feel more strength and fewer symptoms, such as pain and high blood pressure. The conclusion from this study is that diet and exercise habits have changed but only to a certain extent, however, the physical and mental health has changed for the better.</p>

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