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Pituitary
Published in: Pituitary 4/2019

01-08-2019 | Pituitary Adenoma

Preoperative visual evoked potential in the prediction of visual outcome after pituitary macroadenomas surgery

Authors: Mohammad Taghvaei, Seyed Mousa Sadrehosseini, Nima Ostadrahimi, Payam Sarraf, Mehdi Zeinalizadeh

Published in: Pituitary | Issue 4/2019

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Abstract

Objective

The purpose of the present study is to investigate longitudinal changes in Visual evoked potential (VEP) parameters as an objective test after transsphenoidal surgery, its correlation with subjective tests and clinical value of VEP in the prediction of visual outcome.

Methods

Fifty patients with pituitary macroadenoma who underwent surgical removal of the tumor recruited in this study. All the patients underwent ophthalmic examination, static automated perimetry (SAP), VEP and magnetic resonance imaging (MRI) preoperatively and 3 months after surgery.

Results

Fifty patients with pituitary macroadenoma (size: 25.1 ± 9.9 mm) were recruited in the study. Before surgery, the pattern of VEP showed a prolonged latency with reduced amplitude in eyes with abnormal visual acuity or abnormal visual field. The P100 wave latencies and amplitudes showed significant correlation with visual acuity and SAP scores. After surgery, visual acuity and visual field improvements were seen in 51% and 65.6% of eyes, respectively. Mean SAP and visual acuity scores increased significantly (p < 0.01), P100 wave latency declined and amplitude improved after surgery but not significantly. The mean age of patients, size of tumors and preoperative P100 wave latency were significantly lower in eyes with visual field and acuity improvement.

Conclusion

VEP is a helpful quantitative and objective complementary test to visual acuity and SAP exams for assessing pre-operative visual abnormalities and post-operative visual outcome in patients with pituitary macroadenoma.
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Metadata
Title
Preoperative visual evoked potential in the prediction of visual outcome after pituitary macroadenomas surgery
Authors
Mohammad Taghvaei
Seyed Mousa Sadrehosseini
Nima Ostadrahimi
Payam Sarraf
Mehdi Zeinalizadeh
Publication date
01-08-2019
Publisher
Springer US
Published in
Pituitary / Issue 4/2019
Print ISSN: 1386-341X
Electronic ISSN: 1573-7403
DOI
https://doi.org/10.1007/s11102-019-00969-5

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