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Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models

Publication ,  Journal Article
Moshirfar, M; Calvo, CM; Kinard, KI; Williams, LB; Sikder, S; Neuffer, MC
Published in: Clinical Ophthalmology
January 1, 2011

Background: This study analyzes the characteristics of donor and recipient tissue preparation between the Hessburg-Barron and Hanna punch and trephine systems by using elliptical curve fitting models, light microscopy, and anterior segment optical coherence tomography (AS-OCT). Methods: Eight millimeter Hessburg-Barron and Hanna vacuum trephines and punches were used on six cadaver globes and six corneal-scleral rims, respectively. Eccentricity data were generated using measurements from photographs of the corneal buttons and were used to generate an elliptical curve fit to calculate properties of the corneal button. The trephination angle and punch angle were measured by digital protractor software from light microscopy and AS-OCT images to evaluate the consistency with which each device cuts the cornea. Results: The Hanna trephine showed a trend towards producing a more circular recipient button than the Barron trephine (ratio of major axis to minor axis), ie, 1.059 ± 0.041 versus 1.110 ± 0.027 (P = 0.147) and the Hanna punch showed a trend towards producing a more circular donor cut than the Barron punch, ie, 1.021 ± 0.022 versus 1.046 ± 0.039 (P = 0.445). The Hanna trephine was demonstrated to have a more consistent trephination angle than the Barron trephine when assessing light microscopy images, ie, ±14.39° (95% confidence interval [CI] 111.9-157.7) versus ±19.38° (95% CI 101.9-150.2, P = 0.492) and OCT images, ie, ± 8.08° (95% CI 106.2-123.3) versus ± 11.16° (95% CI 109.3-132.6, P = 0.306). The angle created by the Hanna punch had less variability than the Barron punch from both the light microscopy, ie, ±4.81° (95% CI 101.6-113.9) versus ±11.28° (95% CI 84.5-120.6, P = 0.295) and AS-OCT imaging, ie, ±9.96° (95% CI 95.7-116.4) versus ±14.02° (95% CI 91.8-123.7, P = 0.825). Statistical significance was not achieved. Conclusion: The Hanna trephine and punch may be more accurate and consistent in cutting corneal buttons than the Hessburg-Barron trephine and punch when evaluated using elliptical curve fitting models, light microscopy, and AS-OCT. © 2011 Moshirfar et al, publisher and licensee Dove Medical Press Ltd.

Duke Scholars

Published In

Clinical Ophthalmology

DOI

EISSN

1177-5483

ISSN

1177-5467

Publication Date

January 1, 2011

Volume

5

Issue

1

Start / End Page

1121 / 1125

Related Subject Headings

  • 3212 Ophthalmology and optometry
  • 1113 Opthalmology and Optometry
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Moshirfar, M., Calvo, C. M., Kinard, K. I., Williams, L. B., Sikder, S., & Neuffer, M. C. (2011). Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models. Clinical Ophthalmology, 5(1), 1121–1125. https://doi.org/10.2147/opth.s23898
Moshirfar, M., C. M. Calvo, K. I. Kinard, L. B. Williams, S. Sikder, and M. C. Neuffer. “Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models.” Clinical Ophthalmology 5, no. 1 (January 1, 2011): 1121–25. https://doi.org/10.2147/opth.s23898.
Moshirfar M, Calvo CM, Kinard KI, Williams LB, Sikder S, Neuffer MC. Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models. Clinical Ophthalmology. 2011 Jan 1;5(1):1121–5.
Moshirfar, M., et al. “Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models.” Clinical Ophthalmology, vol. 5, no. 1, Jan. 2011, pp. 1121–25. Scopus, doi:10.2147/opth.s23898.
Moshirfar M, Calvo CM, Kinard KI, Williams LB, Sikder S, Neuffer MC. Comparison of Hanna and Hessburg-Barron trephine and punch systems using histological, anterior segment optical coherence tomography, and elliptical curve fitting models. Clinical Ophthalmology. 2011 Jan 1;5(1):1121–1125.

Published In

Clinical Ophthalmology

DOI

EISSN

1177-5483

ISSN

1177-5467

Publication Date

January 1, 2011

Volume

5

Issue

1

Start / End Page

1121 / 1125

Related Subject Headings

  • 3212 Ophthalmology and optometry
  • 1113 Opthalmology and Optometry