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Slipped and lost extraocular muscles.

T D Lenart1, S R Lambert

  • 1Children's Eye Doctors and Adult Strabismus Center, Redmond, Washington, USA.

Ophthalmology Clinics of North America
|November 14, 2001
PubMed
Summary
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A slipped or lost extraocular muscle, often the medial rectus, can cause eye movement limitations. Diagnosis involves various tests, with the oculocardiac reflex being key for identifying and reattaching the muscle.

Area of Science:

  • Ophthalmology
  • Surgical Complications

Background:

  • Slipped or lost extraocular muscles are a potential complication following various eye and orbital surgeries.
  • This condition can lead to significant limitations in eye movement, impacting patient vision and quality of life.

Purpose of the Study:

  • To discuss the differential diagnosis, diagnostic methods, and surgical retrieval techniques for slipped or lost extraocular muscles.
  • To highlight the importance of the oculocardiac reflex in identifying lost muscles.

Main Methods:

  • Review of diagnostic approaches including forced ductions, active force generation, saccadic velocity studies, intraocular pressure measurements, and orbital imaging.
  • Description of surgical retrieval techniques, including traditional conjunctival approach, external orbitotomy, and endoscopic transnasal approach.

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  • Emphasis on the oculocardiac reflex as a critical diagnostic aid.

    • Main Results:

    • No single diagnostic test is absolutely reliable for identifying a lost muscle.
    • The medial rectus muscle is the most frequently affected.
    • Slipped muscles result from improper surgical technique during strabismus surgery, where the muscle or tendon is not adequately secured.
    • Successful retrieval and reattachment of the muscle are crucial for restoring ocular motility.

    Conclusions:

    • A high index of suspicion for slipped or lost muscles is necessary in patients with unexplained limitations in eye movement post-surgery.
    • A combination of diagnostic maneuvers, particularly the oculocardiac reflex, aids in localization.
    • Prompt surgical identification and secure reattachment of the muscle are essential for optimal outcomes.