Intraocular Pressure During Corneal Flap Preparation: Comparison Among Four Femtosecond Lasers in Porcine Eyes

Vetter, Jan M.; Holzer, MP; Teping, C.; Weingärtner, Wolf E; Gericke, Adrian; Stoffelns, Bernhard; Pfeiffer, Norbert; Sekundo, Walter

doi:10.3928/1081597x-20101210-01

Cited by 78 publications

(59 citation statements)

References 21 publications

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“…All treatments were performed as bilateral simultaneous LASIK using the Visumax femtosecond laser [15][16][17][18] and the MEL 80 excimer laser. 13 A nomogram based on previous treatments was used to calculate the laser data entry; both surgeons used the same nomogram.…”

Section: Methodsmentioning

confidence: 99%

Transitioning from mechanical microkeratome to femtosecond laser flap creation: Visual outcomes of an experienced and a novice LASIK surgeon

Reinstein¹,

Carp²,

Archer³

et al. 2012

Journal of Cataract and Refractive Surgery

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Section: Methodsmentioning

confidence: 99%

Transitioning from mechanical microkeratome to femtosecond laser flap creation: Visual outcomes of an experienced and a novice LASIK surgeon

Reinstein¹,

Carp²,

Archer³

et al. 2012

Journal of Cataract and Refractive Surgery

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“…In all studies published so far, resulting IOP values were often determined for single steps of a specific surgical procedure [1,11,28], and the authors observed a strong surgeon-dependent correlation. Christensen et al [27] investigated the IOP resulting from insertions of 19-to 32-G needles and referenced the applied force.…”

Section: Discussionmentioning

confidence: 99%

“…IOP rises up to 300 mm Hg and higher during some stages of surgery [1,11]. The IOP reaches especially high values during the cutting stages [1,11].…”

Section: Introductionmentioning

confidence: 99%

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Short-Term Intraocular Pressure Rise during Locally Induced Force by Ophthalmologic Surgery Applications

et al. 2018

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Purpose: Surgical or diagnostic procedures are often accompanied by a short-term increase in intraocular pressure (IOP). A short-term increase in IOP can occur during refractive procedures, vitreoretinal surgery, transillumination, photocoagulation, or cryocoagulation. A porcine eye model was chosen (n = 89) to compile comparable study data and to de termine correlations between the force induced and the resulting intraocular pressure while excluding the effect of surgeons. Methods: The IOP was measured in the anterior chamber. IOP changes were induced by applying an external force and measured when using a cannula, trocar, and cryocoagulation (n = 32), and correlations between force and resulting IOP were assessed (n = 57). Results: A correlation was noted between the force induced and the IOP increase, which showed a linear dependency. The insertion of a 29-G cannula caused a mean ΔIOP value of 49.1 ± 2.9 mm Hg and an external force of 0.76 N, and that of a 23-G trocar 344.4 ± 5.9 mm Hg and 6.09 N, respectively. The rise in IOP during a simulated cryocoagulation reached values between 57.3 ± 14.8 mm Hg (cryoprobe tip diameter: 0.9 mm) and 130.3 ± 2.9 mm Hg (cryoprobe tip diameter: 7.0 mm). Conclusion: The values of the forces applied can be converted into the resulting IOP based on the specific action. Surgical or diagnostic procedures should, therefore, be evaluated with regard to preexisting pathologies, such as glaucoma.

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“…Massive IOP rises as seen in porcine eyes while using flat applanation interfaces (for a refractive procedure, not for cataract extraction) in the range between 130 and 180 mm Hg seem to pose a significant risk for those elderly patients with glaucoma as a comorbidity. Even curved applanation interfaces were associated with massive IOP rises between 65 and 205 mmHg [7]. A fluid-filled interface has been proven to lead only to comparably small IOP increases for a short time.…”

Section: Iop During Femtosecond Laser-assisted Cataract Surgerymentioning

confidence: 99%

Femtosecond Techniques in Cataract Surgery

Dick¹,

Schultz²,

Gerste³

2014

Cataract Surgery: Maximizing Outcomes Through Research

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The femtosecond laser has added a new dimension to cataract surgery in terms of precision, reproducibility, safety, and patient satisfaction. With this technology, capsulotomies are performed with unprecedented accuracy while lens fragmentation requires less ultrasound energy than during a conventional phacoemulsification. In an ever-increasing number of cases, no phaco energy at all is required which enhances the patient's safety, particularly with regard to the corneal endothelium. While femtosecond laser treatment is perfect for the implantation of a premium IOL after routine cataract surgery, the technology can also be used with a high success rate in challenging cases like in eyes with a small, undilated pupil and in pediatric cataracts. In our experience, the technology provides a safe and sound approach to the highest patient satisfaction.

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Intraocular Pressure During Corneal Flap Preparation: Comparison Among Four Femtosecond Lasers in Porcine Eyes

Abstract: There is considerable variation in IOP among the tested femtosecond lasers during a regular lamellar flap creation and during the worst-case procedure. The VisuMax femtosecond laser seems to cause the lowest IOP rise in both settings.

Cited by 78 publications

References 21 publications

Transitioning from mechanical microkeratome to femtosecond laser flap creation: Visual outcomes of an experienced and a novice LASIK surgeon

Transitioning from mechanical microkeratome to femtosecond laser flap creation: Visual outcomes of an experienced and a novice LASIK surgeon

Short-Term Intraocular Pressure Rise during Locally Induced Force by Ophthalmologic Surgery Applications

Femtosecond Techniques in Cataract Surgery

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