TY - JOUR
T1 - Effect of vertical transposition of the medial rectus muscle on primary position alignment in infantile esotropia with A- or V-pattern strabismus
AU - Dickmann, A.
AU - Petroni, S.
AU - Salerni, A.
AU - Parrilla, R.
AU - Savino, Gustavo
AU - Battendieri, R.
AU - Perrotta, V.
AU - Radini, C.
AU - Balestrazzi, E.
PY - 2011
Y1 - 2011
N2 - Purpose: To determine the effect of vertical displacement of muscle insertions on the surgical dose-response relationship in patients undergoing bilateral medial rectus recessions. Methods: Retrospective chart review of patients undergoing bilateral medial rectus recessions for correction of congenital esotropia with or without vertical displacement for A or V patterns. Patients were clustered into A pattern, V pattern, and "simple" (no pattern) groups. Strabismus angle at distance and near before and after surgery was recorded. Surgical dose-response relationships (in prism diopters/mm) were determined at the 6-month follow-up visit and compared. Results: A total of 55 patients (28 male and 27 female patients; mean age, 6.9 years; range, 2-17 years) were included. Of these, 28 had either A pattern (18) or V pattern (10), and 27 were in the simple group. Mean preoperative angle of deviation was 34Δ at distance and 40Δ at near. The surgical dose-response relationship was significantly greater (at both distance and near) in the A pattern group (2.43Δ/mm, distance [p = 0.005]; 2.76Δ/mm, near [p = 0.04]) than in the simple group (1.56 Δ/mm, distance; 2.03Δ/mm, near). The surgical response in the V pattern group (1.96Δ/mm, distance [p = 0.34]; 2.03Δ/mm, near [p = 0.94]) was not significantly different from the simple group. Conclusions: Upward displacement of the medial rectus muscles increased the surgical dose/response relationship in patients with A-pattern esotropia. A similar effect was not observed with downward displacement in patients with V-pattern strabismus. Surgeons should be aware of this enhanced response when planning surgery for A-pattern esotropia. Copyright © 2011 by the American Association for Pediatric Ophthalmology and Strabismus.
AB - Purpose: To determine the effect of vertical displacement of muscle insertions on the surgical dose-response relationship in patients undergoing bilateral medial rectus recessions. Methods: Retrospective chart review of patients undergoing bilateral medial rectus recessions for correction of congenital esotropia with or without vertical displacement for A or V patterns. Patients were clustered into A pattern, V pattern, and "simple" (no pattern) groups. Strabismus angle at distance and near before and after surgery was recorded. Surgical dose-response relationships (in prism diopters/mm) were determined at the 6-month follow-up visit and compared. Results: A total of 55 patients (28 male and 27 female patients; mean age, 6.9 years; range, 2-17 years) were included. Of these, 28 had either A pattern (18) or V pattern (10), and 27 were in the simple group. Mean preoperative angle of deviation was 34Δ at distance and 40Δ at near. The surgical dose-response relationship was significantly greater (at both distance and near) in the A pattern group (2.43Δ/mm, distance [p = 0.005]; 2.76Δ/mm, near [p = 0.04]) than in the simple group (1.56 Δ/mm, distance; 2.03Δ/mm, near). The surgical response in the V pattern group (1.96Δ/mm, distance [p = 0.34]; 2.03Δ/mm, near [p = 0.94]) was not significantly different from the simple group. Conclusions: Upward displacement of the medial rectus muscles increased the surgical dose/response relationship in patients with A-pattern esotropia. A similar effect was not observed with downward displacement in patients with V-pattern strabismus. Surgeons should be aware of this enhanced response when planning surgery for A-pattern esotropia. Copyright © 2011 by the American Association for Pediatric Ophthalmology and Strabismus.
KW - Binocular
KW - Child
KW - Esotropia
KW - Oculomotor Muscles
KW - Ophthalmologic Surgical Procedures
KW - Retrospective Studies
KW - Vision
KW - Binocular
KW - Child
KW - Esotropia
KW - Oculomotor Muscles
KW - Ophthalmologic Surgical Procedures
KW - Retrospective Studies
KW - Vision
UR - https://publicatt.unicatt.it/handle/10807/161271
UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952645887&origin=inward
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79952645887&origin=inward
U2 - 10.1016/j.jaapos.2010.11.017
DO - 10.1016/j.jaapos.2010.11.017
M3 - Article
SN - 1091-8531
VL - 15
SP - 14
EP - 16
JO - Journal of AAPOS
JF - Journal of AAPOS
IS - 1
ER -