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Simulating Human Pleura Performance in Medical Training Using Measured Tissue Mechanical Properties
Title
Simulating Human Pleura Performance in Medical Training Using Measured Tissue Mechanical Properties.
Creator
Norfleet, Jack, Bai, Yuanli, Kassab, Alain, Metcalf, David, Cendan, Juan, University of Central Florida
Abstract / Description
Medical simulations provide hands-on training at various levels of medical expertise. Yet these simulators fail to accurately mimic the look, feel and behavior of human tissue. Applying measured mechanical properties from human cadaver tissues promises to improve the fidelity of simulated tissue behaviors when subjected to medical procedures. Samples of human parietal pleura were tested under uniaxial tension to failure and measured characteristics were replicated in synthetic pleura. Context...
Show moreMedical simulations provide hands-on training at various levels of medical expertise. Yet these simulators fail to accurately mimic the look, feel and behavior of human tissue. Applying measured mechanical properties from human cadaver tissues promises to improve the fidelity of simulated tissue behaviors when subjected to medical procedures. Samples of human parietal pleura were tested under uniaxial tension to failure and measured characteristics were replicated in synthetic pleura. Context specific parameters were then collected and compared between human pleura and the new synthetics. These comparisons tested the hypothesis; H1 Gaps exist between synthetic and human pleura performance, H2: Human tissue fracture mechanics define desired performance of synthetic tissues, H3: Synthetic and human tissues with similar stress/strain parameters will behave similarly when blunt punctured. The results promote the future development of high fidelity tissue simulants for medical training.The studied tissue is parietal pleura which contributes the critical haptic (")pop(") indicating access to the proper anatomic space during the tube thoracostomy procedure. Once accessed through blunt puncture, tube is then inserted to drain air and fluid from around the lungs.Stress/strain based hyper-elastic and fracture properties calibrated from fresh human cadaver pleura were used to define performance requirements. Synthetic pleura were then prototyped and their mechanical properties were characterized. Commercial pleura simulants were puncture tested and compared to compliant custom and off-the-shelf formulations. A non-compliant but commonly used pleura substitute was also tested. Blunt puncture force and displacement were compared for each of the materials to test the stated hypotheses.
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Date Issued
2018
Identifier
CFE0007065, ucf:52023
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007065
A COMPARATIVE STUDY OF MEDICAL AND LITERARY REPRESENTATIONS OF SHELL SHOCK, 1914-50
Title
A COMPARATIVE STUDY OF MEDICAL AND LITERARY REPRESENTATIONS OF SHELL SHOCK, 1914-50.
Creator
Das, Madison, Kane, Louise, University of Central Florida
Abstract / Description
This thesis explores shell shock--a common but misunderstood disorder seen in soldiers of World War One--through a Medical Humanities framework. Chapter 1 conducts a traditional medical review of scientific articles published on the pathology, symptoms, and treatment of shell shock between 1914-50. Chapter 2 builds upon this by offering a literary reading of Rebecca West's novel, The Return of the Soldier, which was published as the war drew to a close in 1918. The reading of West draws upon...
Show moreThis thesis explores shell shock--a common but misunderstood disorder seen in soldiers of World War One--through a Medical Humanities framework. Chapter 1 conducts a traditional medical review of scientific articles published on the pathology, symptoms, and treatment of shell shock between 1914-50. Chapter 2 builds upon this by offering a literary reading of Rebecca West's novel, The Return of the Soldier, which was published as the war drew to a close in 1918. The reading of West draws upon the medical research detailed in Chapter 1 to offer new conclusions about Chris's shell shock. The thesis shows how taking an interdisciplinary approach to shell shock enables the development of new perspectives of and approaches to shell shock, its history and significance, and its links to present-day mental health conditions such as post-traumatic stress disorder (PTSD).
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Date Issued
2019
Identifier
CFH2000543, ucf:45655
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFH2000543
Impact of Interruption Frequency on Nurses' Performance, Satisfaction, and Cognition During Patient-Controlled Analgesia Use in the Simulated Setting
Title
Impact of Interruption Frequency on Nurses' Performance, Satisfaction, and Cognition During Patient-Controlled Analgesia Use in the Simulated Setting.
Creator
Campoe, Kristi, Talbert, Steven, Sole, Mary Lou, Andrews, Diane, Jentsch, Florian, University of Central Florida
Abstract / Description
Problem: Interruption during medication administration is a significant patient safety concern within health care, especially during the administration of high risk medications in nursing. Patient-controlled analgesia (PCA) devices are frequently associated with adverse events and have a four-fold increased risk of patient injury compared to non-PCA related adverse events. While the nature and frequency of interruptions have been established for nurses' medication processes, the impact of...
Show moreProblem: Interruption during medication administration is a significant patient safety concern within health care, especially during the administration of high risk medications in nursing. Patient-controlled analgesia (PCA) devices are frequently associated with adverse events and have a four-fold increased risk of patient injury compared to non-PCA related adverse events. While the nature and frequency of interruptions have been established for nurses' medication processes, the impact of interruption frequency on nurses' PCA interaction has not been fully measured or described.Purpose: The purposes of this study were to quantify the impact of interruption frequency on registered nurses' (RN) performance, satisfaction, and cognitive workload during PCA interaction, and to determine nurses' perceptions of the impact of interruption frequency.Methods: This study employed a mixed-method design. First, an experimental repeated measures design was used to quantify the impact of interruption frequency on a purposive sample of nine medical-surgical RNs. The RNs completed PCA programming tasks in a simulated laboratory nursing environment for each of four conditions where interruption frequency was pre-determined. Four established human factors usability measures were completed for each of the four test conditions. The research questions were answered using repeated measures analysis of variance with (RM-ANOVA), McNamar's test, and Friedman's test. After each experiment, semi-structured interviews were used to collect data that were analyzed using inductive qualitative content analysis to determine RNs' perceptions of the impact of interruption frequency. Results: Results of the RM-ANOVA were significant for the main effect of interruption frequency on efficiency F(3,24)=9.592, p = .000. McNemar's test did not show significance for the impact of interruption frequency on effectiveness (accuracy). Friedman test showed participant satisfaction was significantly impacted by interruption frequency (x2=9.47, df=3, p=0.024). Friedman test showed no significance for the main effect of interruption frequency on cognitive workload scores by condition type (x2=1.88, df=3, p=0.599). Results of the qualitative content analysis revealed two main categories to describe nurses' perception of interruption frequency: the nature of interruptions and nurses' reaction to the interrupted work environment.Discussion/Implications: The results suggested that interruption frequency significantly affected task completion time and satisfaction for participants but not participant accuracy or cognitive workload. A high error rate during PCA programming tasks indicated the need to evaluate the conditions in which RNs complete PCA programming as each error presents potential risk of patient harm. RNs' described the impact of interruption frequency as having a negative impact on the work environment and subsequently implement compensating strategies to counterbalance interruptions. RNs' perceived that patient safety was negatively impacted by frequent interruption. RNs experienced negative intrapersonal consequences as a results of frequent interruption. Additional study is needed to better understand the impact of interruption frequency on RNs' performance accuracy and cognitive workload.
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Date Issued
2015
Identifier
CFE0005770, ucf:50099
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005770