Concurrent and face validity of a capsulorhexis simulation with respect to human patients

P. Pat Banerjee; Deepak P. Edward; Shun Liang; Charles S. Bouchard; Paul J. Bryar; Richard Ahuja; Phillip Dray; Daniel P. Bailey

doi:10.3233/978-1-61499-022-2-35

Concurrent and face validity of a capsulorhexis simulation with respect to human patients

P. Pat Banerjee, Deepak P. Edward, Shun Liang, Charles S. Bouchard, Paul J. Bryar, Richard Ahuja, Phillip Dray, Daniel P. Bailey

School of Medicine

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Scopus citations

Abstract

A prototype version of the ImmersiveTouch® virtual reality simulator was applied to capsulorhexis, the creation of circular tear or "rhexis" in the lens capsule of the eye during cataract surgery. Virtual and live surgery scores by residents were compared. The same three metrics are used in each mode: circularity of the rhexis, duration of surgery (sec), and number of forceps grabs of the capsule per completed rhexis (fewer is better). The average simulator circularity score correlated closely with the average live score (P = 0.0002; N = 4), establishing "concurrent validity" for this metric. Individuals performed similarly to each other in both modes, as shown by the low standard deviations for average circularity (virtual 0.92 ± 0.04; live 0.88 ± 0.04). By contrast, the standard deviations are high for the other two metrics, capsulorhexis duration (virtual 96.91 ± 44.23 sec; live 94.42 ± 65.74 sec, N = 8) and number of forceps grabs (virtual 10.66 ± 4.81; live 10.31 ± 5.23, N = 8). Nevertheless, the simulator was able to demonstrate that the surgeons with wide variations in total duration and number of capsular grabs in 2 to 4 trials of simulated surgery also had similar variations in live surgery, so that the simulator retains some realism or "face validity."

Original language	English (US)
Title of host publication	Studies in Health Technology and Informatics
Pages	35-41
Number of pages	7
Volume	173
DOIs	https://doi.org/10.3233/978-1-61499-022-2-35
State	Published - 2012
Event	Medicine Meets Virtual Reality 19: NextMed, MMVR 2012 - Newport Beach, CA, United States Duration: Feb 9 2012 → Feb 11 2012

Other

Other	Medicine Meets Virtual Reality 19: NextMed, MMVR 2012
Country/Territory	United States
City	Newport Beach, CA
Period	2/9/12 → 2/11/12

Keywords

Capsulorhexis
Cataract surgery
Construct validity
Face validity
ImmersiveTouch
Simulator training
Surgery simulation
Virtual reality

ASJC Scopus subject areas

Biomedical Engineering
Health Informatics
Health Information Management

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10.3233/978-1-61499-022-2-35

Cite this

Banerjee, PP, Edward, DP, Liang, S, Bouchard, CS, Bryar, PJ, Ahuja, R, Dray, P & Bailey, DP 2012, Concurrent and face validity of a capsulorhexis simulation with respect to human patients. in Studies in Health Technology and Informatics. vol. 173, pp. 35-41, Medicine Meets Virtual Reality 19: NextMed, MMVR 2012, Newport Beach, CA, United States, 2/9/12. https://doi.org/10.3233/978-1-61499-022-2-35

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title = "Concurrent and face validity of a capsulorhexis simulation with respect to human patients",

abstract = "A prototype version of the ImmersiveTouch{\textregistered} virtual reality simulator was applied to capsulorhexis, the creation of circular tear or {"}rhexis{"} in the lens capsule of the eye during cataract surgery. Virtual and live surgery scores by residents were compared. The same three metrics are used in each mode: circularity of the rhexis, duration of surgery (sec), and number of forceps grabs of the capsule per completed rhexis (fewer is better). The average simulator circularity score correlated closely with the average live score (P = 0.0002; N = 4), establishing {"}concurrent validity{"} for this metric. Individuals performed similarly to each other in both modes, as shown by the low standard deviations for average circularity (virtual 0.92 ± 0.04; live 0.88 ± 0.04). By contrast, the standard deviations are high for the other two metrics, capsulorhexis duration (virtual 96.91 ± 44.23 sec; live 94.42 ± 65.74 sec, N = 8) and number of forceps grabs (virtual 10.66 ± 4.81; live 10.31 ± 5.23, N = 8). Nevertheless, the simulator was able to demonstrate that the surgeons with wide variations in total duration and number of capsular grabs in 2 to 4 trials of simulated surgery also had similar variations in live surgery, so that the simulator retains some realism or {"}face validity.{"}",

keywords = "Capsulorhexis, Cataract surgery, Construct validity, Face validity, ImmersiveTouch, Simulator training, Surgery simulation, Virtual reality",

author = "Banerjee, {P. Pat} and Edward, {Deepak P.} and Shun Liang and Bouchard, {Charles S.} and Bryar, {Paul J.} and Richard Ahuja and Phillip Dray and Bailey, {Daniel P.}",

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doi = "10.3233/978-1-61499-022-2-35",

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AU - Edward, Deepak P.

AU - Liang, Shun

AU - Bouchard, Charles S.

AU - Bryar, Paul J.

AU - Ahuja, Richard

AU - Dray, Phillip

AU - Bailey, Daniel P.

PY - 2012

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N2 - A prototype version of the ImmersiveTouch® virtual reality simulator was applied to capsulorhexis, the creation of circular tear or "rhexis" in the lens capsule of the eye during cataract surgery. Virtual and live surgery scores by residents were compared. The same three metrics are used in each mode: circularity of the rhexis, duration of surgery (sec), and number of forceps grabs of the capsule per completed rhexis (fewer is better). The average simulator circularity score correlated closely with the average live score (P = 0.0002; N = 4), establishing "concurrent validity" for this metric. Individuals performed similarly to each other in both modes, as shown by the low standard deviations for average circularity (virtual 0.92 ± 0.04; live 0.88 ± 0.04). By contrast, the standard deviations are high for the other two metrics, capsulorhexis duration (virtual 96.91 ± 44.23 sec; live 94.42 ± 65.74 sec, N = 8) and number of forceps grabs (virtual 10.66 ± 4.81; live 10.31 ± 5.23, N = 8). Nevertheless, the simulator was able to demonstrate that the surgeons with wide variations in total duration and number of capsular grabs in 2 to 4 trials of simulated surgery also had similar variations in live surgery, so that the simulator retains some realism or "face validity."

AB - A prototype version of the ImmersiveTouch® virtual reality simulator was applied to capsulorhexis, the creation of circular tear or "rhexis" in the lens capsule of the eye during cataract surgery. Virtual and live surgery scores by residents were compared. The same three metrics are used in each mode: circularity of the rhexis, duration of surgery (sec), and number of forceps grabs of the capsule per completed rhexis (fewer is better). The average simulator circularity score correlated closely with the average live score (P = 0.0002; N = 4), establishing "concurrent validity" for this metric. Individuals performed similarly to each other in both modes, as shown by the low standard deviations for average circularity (virtual 0.92 ± 0.04; live 0.88 ± 0.04). By contrast, the standard deviations are high for the other two metrics, capsulorhexis duration (virtual 96.91 ± 44.23 sec; live 94.42 ± 65.74 sec, N = 8) and number of forceps grabs (virtual 10.66 ± 4.81; live 10.31 ± 5.23, N = 8). Nevertheless, the simulator was able to demonstrate that the surgeons with wide variations in total duration and number of capsular grabs in 2 to 4 trials of simulated surgery also had similar variations in live surgery, so that the simulator retains some realism or "face validity."

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KW - Face validity

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KW - Simulator training

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ER -

Concurrent and face validity of a capsulorhexis simulation with respect to human patients

Abstract

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Keywords

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