Comparison between Lenstar LS 900 non-contact biometry and OcuScan RXP contact biometry for task delegation

被引:6
作者
El Chehab, H. [1 ]
Giraud, J. -M. [1 ]
Le Corre, A. [1 ]
Chave, N. [1 ]
Durand, F. [1 ]
Kuter, S. [1 ]
Ract-Madoux, G. [1 ]
Swalduz, B. [1 ]
Mourgues, G. [1 ]
Dot, C. [1 ]
机构
[1] Hop Instruct Armees Desgenettes, Serv Ophtalmol, F-69003 Lyon, France
来源
JOURNAL FRANCAIS D OPHTALMOLOGIE | 2011年 / 34卷 / 03期
关键词
Non-contact biometry; Contact biometry; Delegated tasks; Refractive cataract surgery; POWER;
D O I
10.1016/j.jfo.2010.09.026
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Introduction. - Non-contact biometers have many advantages including the delegation of tasks to orthoptists. This study analyses the reliability of measurements comparing contact and non-contacts techniques. Patients and methods. - Comparative measurements were taken on 86 eyes of 45 patients (mean age: 74 years; 44.4% males) in preoperative phacoemulsification by three orthoptists with experience in this task. Each patient had non-contact measurements (Lenstar LS 900, Haag-Streit) and contact measurements (corneal biometry and ultrasound pachymetry with OcuScan RXP, Alcon) and a keratometry refractometer (TONOREF II, Nidek). The axial length data, pachymetry, power of the intraocular lens (SRK/T formula), anterior chamber depth, and the average keratometry were analyzed by paired comparisons. Results. - The non-contact biometer was ineffective in 5.8% of cases (Parkinson's disease, two cases; dense posterior subcapsular cataracts, three cases). The non-contact pachymetry was statistically significantly higher (546.4 mu m VS. 538.6 mu m; p < 0.001). The axial length was significantly longer for the non-contact measurement (23.21 mm vs. 23.05 mm; p < 0.0001). In 25.9% of patients, this difference was greater than or equal to 0.3 mm and affected the power of the implant chosen. The anterior chamber depth measured on non-contact biometry was statistically greater (3.33 mm vs. 3.03 mm; p < 0.0001). However, there was no significant difference regarding the average keratometry (43.82 D vs. 43.78 D; p = 0327). Conclusion. - Besides the infectious benefit for patients, absence of cleaning and decontamination of biometric probes, non-contact measurements using Lenstar are an example of a safe activity that can be delegated to assistants. This technique has been used to optimize the refractive outcome of 25.9% of our patients undergoing refractive cataract surgery. (C) 2010 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:175 / 180
页数:6
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