Face and Construct Validation of a Virtual Peg Transfer Simulator
Identifieur interne : 002406 ( Ncbi/Checkpoint ); précédent : 002405; suivant : 002407Face and Construct Validation of a Virtual Peg Transfer Simulator
Auteurs : Venkata S. Arikatla ; Ganesh Sankaranarayanan ; Woojin Ahn ; Amine Chellali ; Suvranu De ; Gl Caroline ; John Hwabejire ; Marc Demoya ; Steven Schwaitzberg ; Daniel B. JonesSource :
- Surgical endoscopy [ 0930-2794 ] ; 2012.
Abstract
The Fundamentals of Laparascopic Surgery (FLS) trainer box is now established as a standard for evaluating minimally invasive surgical skills. A particularly simple task in this trainer box is the peg transfer task which is aimed at testing the surgeon’s bimanual dexterity, hand-eye coordination, speed and precision. The Virtual Basic Laparoscopic Skill Trainer (VBLaST©) is a virtual version of the FLS tasks which allows automatic scoring and real time, subjective quantification of performance without the need of a human proctor. In this paper we report validation studies of the VBLaST© peg transfer (VBLaST-PT©) simulator.
Thirty-five subjects with medical background were divided into two groups: experts (PGY 4-5, fellows and practicing surgeons) and novices (PGY 1-3). The subjects were asked to perform the peg transfer task on both the FLS trainer box and the VBLaST-PT© simulator and their performance was evaluated based on established metrics of error and time. A new length of trajectory (LOT) metric has also been introduced for offline analysis. A questionnaire was used to rate the realism of the virtual system on a 5-point Likert scale.
Preliminary face validation of the VBLaST-PT© with 34 subjects rated on a 5-point Likert scale questionnaire revealed high scores for all aspects of simulation, with 3.53 being the lowest mean score across all questions. A two-tailed Mann-Whitney performed on the total scores showed significant (p=0.001) difference between the groups. A similar test performed on the task time (p=0.002) and the length of trajectory (p=0.004) separately showed statistically significant differences between the experts and novice groups (p<0.05). The experts appear to be traversing shorter overall trajectories in less time than the novices.
VBLaST-PT© showed both face and construct validity and has promise as a substitute for the FLS to training peg transfer skills.
Url:
DOI: 10.1007/s00464-012-2664-y
PubMed: 23263645
PubMed Central: 3625247
Affiliations:
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Face and Construct Validation of a Virtual Peg Transfer Simulator</title>
<author><name sortKey="Arikatla, Venkata S" sort="Arikatla, Venkata S" uniqKey="Arikatla V" first="Venkata S" last="Arikatla">Venkata S. Arikatla</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
<wicri:noCountry code="subfield">Rensselaer Polytechnic Institute</wicri:noCountry>
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<author><name sortKey="Sankaranarayanan, Ganesh" sort="Sankaranarayanan, Ganesh" uniqKey="Sankaranarayanan G" first="Ganesh" last="Sankaranarayanan">Ganesh Sankaranarayanan</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
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<author><name sortKey="Ahn, Woojin" sort="Ahn, Woojin" uniqKey="Ahn W" first="Woojin" last="Ahn">Woojin Ahn</name>
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<author><name sortKey="Chellali, Amine" sort="Chellali, Amine" uniqKey="Chellali A" first="Amine" last="Chellali">Amine Chellali</name>
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<wicri:noCountry code="subfield">Harvard Medical School</wicri:noCountry>
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<author><name sortKey="De, Suvranu" sort="De, Suvranu" uniqKey="De S" first="Suvranu" last="De">Suvranu De</name>
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<author><name sortKey="Caroline, Gl" sort="Caroline, Gl" uniqKey="Caroline G" first="Gl" last="Caroline">Gl Caroline</name>
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<wicri:noCountry code="subfield">Industrial and Human Factors Engineering Wright State University</wicri:noCountry>
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<author><name sortKey="Hwabejire, John" sort="Hwabejire, John" uniqKey="Hwabejire J" first="John" last="Hwabejire">John Hwabejire</name>
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<wicri:noCountry code="subfield">Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</wicri:noCountry>
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<author><name sortKey="Demoya, Marc" sort="Demoya, Marc" uniqKey="Demoya M" first="Marc" last="Demoya">Marc Demoya</name>
<affiliation><nlm:aff id="A3">Division of Trauma, Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</nlm:aff>
<wicri:noCountry code="subfield">Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</wicri:noCountry>
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<author><name sortKey="Schwaitzberg, Steven" sort="Schwaitzberg, Steven" uniqKey="Schwaitzberg S" first="Steven" last="Schwaitzberg">Steven Schwaitzberg</name>
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<wicri:noCountry code="subfield">Harvard Medical School</wicri:noCountry>
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<author><name sortKey="Jones, Daniel B" sort="Jones, Daniel B" uniqKey="Jones D" first="Daniel B." last="Jones">Daniel B. Jones</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Face and Construct Validation of a Virtual Peg Transfer Simulator</title>
<author><name sortKey="Arikatla, Venkata S" sort="Arikatla, Venkata S" uniqKey="Arikatla V" first="Venkata S" last="Arikatla">Venkata S. Arikatla</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
<wicri:noCountry code="subfield">Rensselaer Polytechnic Institute</wicri:noCountry>
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<author><name sortKey="Sankaranarayanan, Ganesh" sort="Sankaranarayanan, Ganesh" uniqKey="Sankaranarayanan G" first="Ganesh" last="Sankaranarayanan">Ganesh Sankaranarayanan</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
<wicri:noCountry code="subfield">Rensselaer Polytechnic Institute</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="Ahn, Woojin" sort="Ahn, Woojin" uniqKey="Ahn W" first="Woojin" last="Ahn">Woojin Ahn</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
<wicri:noCountry code="subfield">Rensselaer Polytechnic Institute</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="Chellali, Amine" sort="Chellali, Amine" uniqKey="Chellali A" first="Amine" last="Chellali">Amine Chellali</name>
<affiliation><nlm:aff id="A2">Department of Surgery, Cambridge Health Alliance, Harvard Medical School</nlm:aff>
<wicri:noCountry code="subfield">Harvard Medical School</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="De, Suvranu" sort="De, Suvranu" uniqKey="De S" first="Suvranu" last="De">Suvranu De</name>
<affiliation><nlm:aff id="A1">Center for Modeling, Simulation and Imaging in Medicine, Rensselaer Polytechnic Institute</nlm:aff>
<wicri:noCountry code="subfield">Rensselaer Polytechnic Institute</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="Caroline, Gl" sort="Caroline, Gl" uniqKey="Caroline G" first="Gl" last="Caroline">Gl Caroline</name>
<affiliation><nlm:aff id="A5">Department of Biomedical, Industrial and Human Factors Engineering Wright State University</nlm:aff>
<wicri:noCountry code="subfield">Industrial and Human Factors Engineering Wright State University</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="Hwabejire, John" sort="Hwabejire, John" uniqKey="Hwabejire J" first="John" last="Hwabejire">John Hwabejire</name>
<affiliation><nlm:aff id="A3">Division of Trauma, Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</nlm:aff>
<wicri:noCountry code="subfield">Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</wicri:noCountry>
</affiliation>
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<author><name sortKey="Demoya, Marc" sort="Demoya, Marc" uniqKey="Demoya M" first="Marc" last="Demoya">Marc Demoya</name>
<affiliation><nlm:aff id="A3">Division of Trauma, Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</nlm:aff>
<wicri:noCountry code="subfield">Massachusetts General Hospital Harvard Medical School Massachusetts General Hospital</wicri:noCountry>
</affiliation>
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<author><name sortKey="Schwaitzberg, Steven" sort="Schwaitzberg, Steven" uniqKey="Schwaitzberg S" first="Steven" last="Schwaitzberg">Steven Schwaitzberg</name>
<affiliation><nlm:aff id="A2">Department of Surgery, Cambridge Health Alliance, Harvard Medical School</nlm:aff>
<wicri:noCountry code="subfield">Harvard Medical School</wicri:noCountry>
</affiliation>
</author>
<author><name sortKey="Jones, Daniel B" sort="Jones, Daniel B" uniqKey="Jones D" first="Daniel B." last="Jones">Daniel B. Jones</name>
<affiliation><nlm:aff id="A4">Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School</nlm:aff>
<wicri:noCountry code="subfield">Harvard Medical School</wicri:noCountry>
</affiliation>
</author>
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<series><title level="j">Surgical endoscopy</title>
<idno type="ISSN">0930-2794</idno>
<idno type="eISSN">1432-2218</idno>
<imprint><date when="2012">2012</date>
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<front><div type="abstract" xml:lang="en"><sec id="S1"><title>Background</title>
<p id="P1">The Fundamentals of Laparascopic Surgery (FLS) trainer box is now established as a standard for evaluating minimally invasive surgical skills. A particularly simple task in this trainer box is the peg transfer task which is aimed at testing the surgeon’s bimanual dexterity, hand-eye coordination, speed and precision. The Virtual Basic Laparoscopic Skill Trainer (VBLaST<sup>©</sup>
) is a virtual version of the FLS tasks which allows automatic scoring and real time, subjective quantification of performance without the need of a human proctor. In this paper we report validation studies of the VBLaST<sup>©</sup>
peg transfer (VBLaST-PT<sup>©</sup>
) simulator.</p>
</sec>
<sec id="S2"><title>Methods</title>
<p id="P2">Thirty-five subjects with medical background were divided into two groups: experts (PGY 4-5, fellows and practicing surgeons) and novices (PGY 1-3). The subjects were asked to perform the peg transfer task on both the FLS trainer box and the VBLaST-PT<sup>©</sup>
simulator and their performance was evaluated based on established metrics of error and time. A new length of trajectory (LOT) metric has also been introduced for offline analysis. A questionnaire was used to rate the realism of the virtual system on a 5-point Likert scale.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P3">Preliminary face validation of the VBLaST-PT<sup>©</sup>
with 34 subjects rated on a 5-point Likert scale questionnaire revealed high scores for all aspects of simulation, with 3.53 being the lowest mean score across all questions. A two-tailed Mann-Whitney performed on the total scores showed significant (p=0.001) difference between the groups. A similar test performed on the task time (p=0.002) and the length of trajectory (p=0.004) separately showed statistically significant differences between the experts and novice groups (p<0.05). The experts appear to be traversing shorter overall trajectories in less time than the novices.</p>
</sec>
<sec id="S4"><title>Conclusion</title>
<p id="P4">VBLaST-PT© showed both face and construct validity and has promise as a substitute for the FLS to training peg transfer skills.</p>
</sec>
</div>
</front>
</TEI>
<affiliations><list></list>
<tree><noCountry><name sortKey="Ahn, Woojin" sort="Ahn, Woojin" uniqKey="Ahn W" first="Woojin" last="Ahn">Woojin Ahn</name>
<name sortKey="Arikatla, Venkata S" sort="Arikatla, Venkata S" uniqKey="Arikatla V" first="Venkata S" last="Arikatla">Venkata S. Arikatla</name>
<name sortKey="Caroline, Gl" sort="Caroline, Gl" uniqKey="Caroline G" first="Gl" last="Caroline">Gl Caroline</name>
<name sortKey="Chellali, Amine" sort="Chellali, Amine" uniqKey="Chellali A" first="Amine" last="Chellali">Amine Chellali</name>
<name sortKey="De, Suvranu" sort="De, Suvranu" uniqKey="De S" first="Suvranu" last="De">Suvranu De</name>
<name sortKey="Demoya, Marc" sort="Demoya, Marc" uniqKey="Demoya M" first="Marc" last="Demoya">Marc Demoya</name>
<name sortKey="Hwabejire, John" sort="Hwabejire, John" uniqKey="Hwabejire J" first="John" last="Hwabejire">John Hwabejire</name>
<name sortKey="Jones, Daniel B" sort="Jones, Daniel B" uniqKey="Jones D" first="Daniel B." last="Jones">Daniel B. Jones</name>
<name sortKey="Sankaranarayanan, Ganesh" sort="Sankaranarayanan, Ganesh" uniqKey="Sankaranarayanan G" first="Ganesh" last="Sankaranarayanan">Ganesh Sankaranarayanan</name>
<name sortKey="Schwaitzberg, Steven" sort="Schwaitzberg, Steven" uniqKey="Schwaitzberg S" first="Steven" last="Schwaitzberg">Steven Schwaitzberg</name>
</noCountry>
</tree>
</affiliations>
</record>
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