Journal List > J Korean Ophthalmol Soc > v.51(3) > 1008752

TOOLS
Kim and Choi: Comparison of Influences on the Cornea by the Longitudinal Phacoemulsification Between the Sovereign ® and Infiniti®
Original Article

J Korean Ophthalmol Soc 2010;51(3):347-352.

Published online: 25 September 2010

DOI: https://doi.org/10.3341/jkos.2010.51.3.347

Comparison of Influences on the Cornea by the Longitudinal Phacoemulsification Between the Sovereign ® and Infiniti®

Kyoung Nam Kim, MD1, Si Hwan Choi, MD1, 2,

1Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Korea

2Research Institute for Bio Medical Science, Chungnam National University College of Medicine, Daejeon, Korea

Address reprint requests to Si Hwan Choi, MD Department of Ophthalmology, Chungnam National University Hospital #640 Daesa-dong, Jung-gu, Daejeon 301-721, Korea Tel: 82-42-280-7609, Fax: 82-42-255-3745, E-mail: kimjy@cnu.ac.kr

Received 12 January 2009       Accepted 29 October 2009

Copyright © 2010 Korean Ophthalmological Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To compare the influences on the corneal endothelium and surgically induced astigmatism following cataract surgery performed with Sovereign® and Infiniti® using the longitudinal phacoemulsification through the clear corneal incision.

Methods

Patients were operated on with the Sovereign® (n=46) and Infiniti® (n=45) programmed with the same parameters. Corneal thickness, endothelial cell count, effective phaco time and average phaco power were measured. Surgically induced astigmatism was calculated by keratometric readings.

Results

The change in corneal thickness at 1 day and endothelial cell count at 1 month postoperatively was significantly lower in the Infiniti® group. However, there were no significant differences in the change in corneal thickness and endothelial cell count at 2 months postoperatively. Surgically induced astigmatism in the 2 groups was consistently similar. Effective phaco time and average phaco power were lower in the Sovereign® group.

Conclusions

Using the longitudinal phacoemulsification, early postoperative change of corneal endothelium was lower in the Infiniti® group. However, the efficacy of phacoemulsification in the Sovereign® group was superior to the Infiniti® group.

Keywords: Corneal endothelium, Infiniti®, Longitudinal phacoemulsification, Sovereign®, Surgically induced astigmatism

References

1. Holladay JT, Cravy TV, Koch DD. Calculating the surgically induced refractive change following ocular surgery. J Cataract Refract Surg. 1992; 18:429–43.
crossref
2. Kelman CD. Phacoemersificaton and aspiration. A new technique of cataract removal. A preliminary report. Am J Ophthalmol. 1967; 64:23–35.
3. Hayashi K, Hayashi H, Nakao F, Hayashi F. Risk factors for corneal endothelial injury during phacoemulsification. J Cataract Refract Surg. 1996; 22:1079–84.
crossref
4. Cameron MD, Poyer JF, Aust SD. Identification of free radicals produced during phacoemulsification. J Cataract Refract Surg. 2001; 27:463–70.
crossref
5. Fine IH, Packer M, Hoffman RS. New phacoemulsification technologies. J Cataract Refract Surg. 2002; 28:1054–60.
crossref
6. Kaushik S, Ram J, Brar GS, Bandyopadhyay S. Comparison of the thermal effect on clear corneal Incisions during phacoemulsification with different generation machines. Ophthalmic Surg Lasers Imaging. 2004; 35:364–70.
crossref
7. Oki K. Measuring Rectilinear flow within the anterior chamber in phacoemulsification procedures. J Cataract Refract Surg. 2004; 30:1759–67.
crossref
8. Davison JA. Comparison of ultrasonic energy expenditures and corneal endothelial cell density reductions during modulated and non-modulated phacoemulsification. Ophthalmic Surg Lasers Imaging. 2007; 38:209–18.
crossref
9. Olson RJ, Jin Y, Kefalopoulos G, Brinton J. Legacy AdvanTec and Sovereign WhiteStar: a wound temperature study. J Cataract Refract Surg. 2004; 30:1109–13.
10. Soscia W, Howard JG, Olson RJ. Microphacoemulsification with WhiteStar: A wound-temperature study. J Cataract Refract Surg. 2002; 28:1044–6.
11. Lee KI, Kim MS. The evaluation of the endothelial cells after cataract extraction and IOL insertion in patients with corneal guttata. J Korean Ophthalmol Soc. 1998; 39:2272–9.
12. Walkow T, Anders N, Klebe S. Endothelial cell loss after phacoemulsification: relation to preoperative and intraoperative parameters. J Cataract Refract Surg. 2000; 26:727–32.
crossref
13. Bourne RR, Minassian DC, Dart JK, et al. Effect of cataract surgery on the corneal endothelium: modern phacoemulsification compared with extracapsular cataract surgery. Ophthalmology. 2004; 111:679–85.
14. Hayashi K, Hayashi H, Nakao F, Hayashi F. Risk factors for corneal endothelial injury during phacoemulsification. J Cataract Refract Surg. 1996; 22:1079–84.
crossref
15. Walkow T, Anders N, Klebe S. Endothelial cell loss after phacoemulsification: relation to preoperative and intraoperative parameters. J Cataract Refract Surg. 2000; 26:727–32.
crossref
16. Koch DD, Liu JF, Glasser DB, et al. A comparison of corneal endothelial changes after use of Healon or Viscoat during phacoemulsification. Am J Ophthalmol. 1993; 115:188–201.
crossref
17. Kosrirukvongs P, Slade SG, Berkeley RG. Corneal endothelial changes after divide and conquer versus chip and flip phacoemulsification. J Cataract Refract Surg. 1997; 23:1006–12.
crossref

Table 1.
Comparison of preoperative conditions between the Sovereign® and Infiniti® group (mean± SD)
  Sovereign® (n=46) Infiniti® (n=45) p-value
BCVA* 0.5±0.3 0.4±0.3 0.164
Corneal curvature (D) 43.9±1.2 44.3±1.2 0.133
Corneal thickness (μm) 542.1±28.6 545.0±30.7 0.661
Endothelial cell count 2660.9±327.8 2641.0±384.6 0.802
Hexagonality (%) 59.1±10.2 59.5±13.7 0.874
Coefficient of variation 0.335±0.073 0.334±0.086 0.972

* BCVA: best-corrected visual acuity (decimal); The change of BCVA was calculated with log MAR and then converted to decimal visual acuity.

Table 2.
Changes of corneal thickness at corneal center between the Sovereign® and Infiniti® group (postop–preop, mean± SD, μm)
Postoperative time Sovereign® (n=46) Infiniti® (n=45) p-value
1 day 61.5±30.8 46.1±21.2 0.011
1 week 32.7±39.7 17.8±16.1 0.030
2 weeks 14.7±17.6 10.8±16.4 0.302
1 month 3.9±10.9 4.1±7.6 0.934
2 months 0.7±3.0 0.8±3.3 0.897
Table 3.
Changes of corneal endothelial cell count between the Sovereign® and Infiniti® group (preop–postop, mean± SD)
Postoperative time Sovereign® (n=46) Infiniti® (n=45) p-value
1 day 237.8±156.0 175.0±107.4 0.038
1 week 262.3±147.4 198.5±116.1 0.034
2 weeks 237.8±152.4 160.0±118.8 0.012
1 month 223.2±163.8 155.0±123.6 0.006
2 months 228.4±175.0 187.9±167.9 0.182
Table 4.
Changes of best corrected visual acuity between the Sovereign® and Infiniti® group (postop–preop, mean± SD)
Postoperative time Sovereign® (n=46) Infiniti® (n=45) p-value
1 day 0.5±0.3 0.4±0.3 0.408
1 week 0.3±0.3 0.3±0.3 0.874
2 weeks 0.3±0.3 0.4±0.3 0.642
1 month 0.3±0.3 0.3±0.3 0.462
2 months 0.3±0.3 0.2±0.2 0.651

The change of BCVA was calculated with log MAR.

Table 5.
Comparison of surgically induced astigmatism between the Sovereign and Infiniti group (postop–preop, mean± SD)
Postoperative time Sovereign® (n=46) Infiniti® (n=45) p-value
1 day 1.1±0.6 1.3±0.7 0.759
1 week 1.1±0.5 1.0±0.5 0.757
2 weeks 0.0±0.4 0.0±0.3 0.719
1 month 0.1±0.4 0.1±0.2 0.657
2 months 0.1±0.3 0.1±0.2 0.694
Table 6.
Comparison of effective phaco time and average phaco power between the Sovereign and Infiniti group according to the grades of nucleosclerosis (mean± SD)
    Sovereign® (n=46) Infiniti® (n=45) p-value
Effective Phaco NSG 1 1.5±2.2(8) 6.7±6.6(9) 0.011
   Time (sec) NSG 2 10.4±6.4(20) 11.3±4.9(16) 0.539
  NSG 3 16.3±11.1(11) 15.0±6.8(12) 1.000
  NSG 4 19.8±3.7(7) 22.9±5.4(8) 0.232
Average Phaco NSG 1 5.0±6.0(8) 11.4±8.6(9) 0.074
   Power (%) NSG 2 12.4±5.6(20) 16.9±4.7(16) 0.006
  NSG 3 14.9±6.4(11) 19.1±9.2(12) 0.379
  NSG 4 17.4±5.0(7) 23.3±6.3(8) 0.040
TOOLS
Similar articles