27 results on '"F. Birnbaum"'
Search Results
2. Clinical results of 123 femtosecond laser-assisted penetrating keratoplasties.
- Author
-
Birnbaum F, Wiggermann A, Maier PC, Böhringer D, and Reinhard T
- Subjects
- Adult, Astigmatism diagnosis, Astigmatism physiopathology, Corneal Diseases immunology, Corneal Diseases physiopathology, Corneal Diseases surgery, Corneal Topography, Female, Fluocortolone therapeutic use, Glucocorticoids therapeutic use, Graft Rejection drug therapy, Graft Rejection immunology, Humans, Male, Middle Aged, Prednisolone analogs & derivatives, Prednisolone therapeutic use, Refraction, Ocular physiology, Suture Techniques, Tomography, Optical Coherence, Treatment Outcome, Visual Acuity physiology, Wound Healing physiology, Astigmatism etiology, Keratoplasty, Penetrating methods, Laser Therapy methods, Postoperative Complications
- Abstract
Background: Postoperative astigmatism following penetrating keratoplasty is a major problem after corneal transplantation. The main goal of new trephination techniques such as femtosecond laser or excimer-laser trephination is to improve refractive and visual outcomes. The femtosecond laser technique makes profiled corneal trephinations such as the top hat or mushroom profile possible. We present the postoperative outcome of femtosecond laser-assisted penetrating keratoplasties., Methods: We performed 123 femtosecond laser-assisted penetrating keratoplasties in 119 patients. The main outcome measures were intraoperative specifics, astigmatism, and irregularity in Orbscan corneal topography, as well as the occurrence of immune reactions and side-effects., Results: All sutures have been removed in 49 of these 123 eyes. Their mean follow-up was 13.9 ± 4.5 months. Time to complete suture removal (n = 49) was 12.0 ± 3.7 months in the mushroom group and 9.8 ± 2.1 months in the top hat group. Mean astigmatism in Orbscan topography was 6.4 ± 3.0 diopters in the mushroom and 5.8 ± 4.6 diopters in the top hat group (all sutures out)., Conclusions: Femtosecond laser-assisted penetrating keratoplasty is a safe surgical technique. Due to the steps in profiled trephinations, the wound area is larger and theoretically the wound healing is, thus, faster and more stable. Complete suture removal is possible at an earlier time point compared to conventional penetrating keratoplasty. However, refractive results are not superior to those following conventional trephination.
- Published
- 2013
- Full Text
- View/download PDF
3. The intrastromal corneal ring in penetrating keratoplasty-long-term results of a prospective randomized study.
- Author
-
Birnbaum F, Schwartzkopff J, Böhringer D, and Reinhard T
- Subjects
- Corneal Topography, Follow-Up Studies, Humans, Prospective Studies, Prosthesis Implantation, Titanium, Treatment Outcome, Visual Acuity physiology, Vitallium, Astigmatism prevention & control, Corneal Stroma surgery, Fuchs' Endothelial Dystrophy surgery, Keratoconus surgery, Keratoplasty, Penetrating, Postoperative Complications, Prostheses and Implants
- Abstract
Purpose: Postoperative astigmatism after penetrating keratoplasty is a major problem in corneal transplantation. The purpose of this prospective randomized study was to evaluate the efficacy and safety of an intrastromal corneal ring after penetrating keratoplasty., Methods: Twenty patients were included, 10 of whom received an intracorneal ring (group 1) and 10 who did not (group 2, control group). Astigmatism in Orbscan corneal topography, occurrence of immune reactions, and occurrence of side effects were this study's main outcome criteria., Results: Mean follow-up time was 27.6 ± 5.3 months. Mean astigmatism (Orbscan) was 4.4 diopters in group 1 and 4.4 diopters in group 2 (P = 0.695). Spontaneous suture rupture occurred in 5 patients with corneal ring but in none of those in the control group. We observed 3 immune reactions in 3 patients with corneal ring, whereas group 2 experienced no rejection (P < 0.05). Endothelial cell loss was 15.1% in the group with the ring and 8.7% in the control group. That difference was not statistically significant (P = 0.146)., Conclusions: The use of the intrastromal corneal ring after penetrating keratoplasty caused no reduction in postoperative astigmatism. However, its use was statistically significantly associated with adverse events.
- Published
- 2011
- Full Text
- View/download PDF
4. [Femtosecond laser-assisted penetrating keratoplasty].
- Author
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Birnbaum F, Maier P, and Reinhard T
- Subjects
- Equipment Design, Humans, Suture Techniques, Astigmatism prevention & control, Fuchs' Endothelial Dystrophy surgery, Keratoconus surgery, Keratomileusis, Laser In Situ instrumentation, Keratoplasty, Penetrating instrumentation, Postoperative Complications prevention & control, Refraction, Ocular
- Abstract
The femtosecond laser technique allows completely new trephination methods in penetrating keratoplasty with profiles in the graft and the host cornea. The most common so-called profiled trephinations are the top hat and mushroom profiles. Due to the profile it is easier to get a watertight wound closure intraoperatively and due to the larger wound surface the wound healing is faster and more stable. This will possibly allow an earlier suture removal with final visual rehabilitation. First clinical results show that femtosecond laser-assisted penetrating keratoplasty is a safe surgical procedure. The long term results after complete suture removal will show whether the astigmatism results are better than those of conventional trephination techniques.
- Published
- 2010
- Full Text
- View/download PDF
5. [Penetrating keratoplasty with intrastromal corneal ring. A prospective randomized study].
- Author
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Birnbaum F, Schwartzkopff J, Böhringer D, and Reinhard T
- Subjects
- Adult, Astigmatism etiology, Humans, Postoperative Complications etiology, Surgical Wound Dehiscence etiology, Visual Acuity, Astigmatism prevention & control, Corneal Stroma surgery, Fuchs' Endothelial Dystrophy surgery, Keratoconus surgery, Keratoplasty, Penetrating instrumentation, Postoperative Complications prevention & control, Prostheses and Implants, Titanium, Vitallium
- Abstract
Background: The purpose of the study was to evaluate the efficacy and safety of Krumeichs' intrastromal corneal ring following penetrating keratoplasty. Postoperative astigmatism and occurrence of complications were the main criteria of this study., Material and Methods: A total of 20 patients were included in this prospectively randomized study (10 patients with and 10 patients without corneal ring). Follow-up examinations were performed 6 weeks, 4, 12, and 18 months postoperatively, including best corrected visual acuity and Orbscan corneal topography., Results: The mean follow-up time is currently 18.9+/-2.8 months. The mean astigmatism (Orbscan) is 3.9 D in the group with ring and 4.0 D in the group without a ring. Spontaneous suture rupture occurred in five patients with corneal ring., Conclusions: The use of the intrastromal corneal ring following penetrating keratoplasty caused no reduction of postoperative astigmatism. The reason for the spontaneous suture ruptures is unclear.
- Published
- 2008
- Full Text
- View/download PDF
6. [Immune suppression following perforating keratoplasty].
- Author
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Birnbaum F, Reis A, and Reinhard T
- Subjects
- Drug Therapy, Combination, Graft Survival drug effects, Humans, Prognosis, Corneal Opacity prevention & control, Graft Rejection prevention & control, Immunosuppressive Agents therapeutic use, Keratoplasty, Penetrating, Postoperative Complications prevention & control
- Published
- 2007
- Full Text
- View/download PDF
7. [Topical immunosuppressives after penetrating keratoplasty].
- Author
-
Birnbaum F, Reis A, and Reinhard T
- Subjects
- Administration, Topical, Animals, Corneal Opacity immunology, Graft Rejection immunology, Graft Survival drug effects, Humans, Immunosuppressive Agents adverse effects, Postoperative Complications immunology, Corneal Opacity drug therapy, Graft Rejection drug therapy, Immunosuppressive Agents administration & dosage, Keratoplasty, Penetrating, Postoperative Complications drug therapy
- Abstract
Topical steroids are routinely used in the postoperative treatment following penetrating keratoplasty. Due to the known side effects such as steroid-response glaucoma, cataract, and surface disorders, a broader armamentarium of topical immunomodulating drugs with comparable efficacy, better tolerance and less side effects is desirable. Cyclosporine A and FK506 eye drops are a promising alternative. A new approach involves subconjunctival drug delivering implants and locally applied antiangiogenic substances, which still have to be tested in clinical studies.
- Published
- 2007
- Full Text
- View/download PDF
8. [Systemic immunosuppressives after penetrating keratoplasty].
- Author
-
Reis A, Birnbaum F, and Reinhard T
- Subjects
- Administration, Oral, Administration, Topical, Animals, Humans, Immunosuppressive Agents adverse effects, Infusions, Intravenous, Ophthalmic Solutions, Corneal Opacity prevention & control, Graft Rejection prevention & control, Immunosuppressive Agents administration & dosage, Keratoplasty, Penetrating, Postoperative Complications prevention & control
- Abstract
Immunologic rejection is the main cause of corneal graft failure. If corneal transplantation is performed in a high-risk situation without the use of systemic immunosuppression, corneal graft failure has to be expected in over 50% of patients within the first postoperative year. The clonal expansion of graft-specific lymphocytes occurs in lymphoid tissues. As topical steroids do not reach the secondary lymphoid organs, and even systemic steroids do not interfere sufficiently with the clonal expansion of activated T cells, it is essential to administer systemic immunosuppressives in order to achieve clear graft survival. As corneal transplantation is not a life-saving procedure, the profile of side-effects is a central issue when choosing an immunosuppressive medication.
- Published
- 2007
- Full Text
- View/download PDF
9. Successful treatment of cystoid macular edema with valdecoxib.
- Author
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Reis A, Birnbaum F, Hansen LL, and Reinhard T
- Subjects
- Aged, Aged, 80 and over, Cyclooxygenase 2 Inhibitors adverse effects, Female, Humans, Isoxazoles adverse effects, Lens Implantation, Intraocular, Macular Edema etiology, Male, Middle Aged, Prospective Studies, Sulfonamides adverse effects, Visual Acuity, Cyclooxygenase 2 Inhibitors therapeutic use, Isoxazoles therapeutic use, Macular Edema drug therapy, Phacoemulsification, Postoperative Complications, Sulfonamides therapeutic use
- Abstract
Purpose: To evaluate the safety and efficacy of the COX-2 inhibitor valdecoxib in treating macular edema after cataract surgery., Setting: University Eye Clinic, Freiburg, Germany and Reis Medical Institution, Liechtenstein., Methods: The COX-2 inhibitor valdecoxib (Bextra) was administered systemically to patients with significant visual loss resulting from macular edema in a prospective clinical trial., Results: Ten patients were enrolled. Valdecoxib was tolerated well and led to a significant visual improvement within 10 days of therapy in all patients., Conclusion: The fast and persistent control of macular edema with valdecoxib warrants further investigation.
- Published
- 2007
- Full Text
- View/download PDF
10. Cyclooxygenase-2 inhibitors: a new therapeutic option in the treatment of macular edema after cataract surgery.
- Author
-
Reis A, Birnbaum F, Hansen LL, and Reinhard T
- Subjects
- Aged, Female, Humans, Lens Implantation, Intraocular, Macular Edema etiology, Visual Acuity, Cyclooxygenase Inhibitors therapeutic use, Isoxazoles therapeutic use, Macular Edema drug therapy, Phacoemulsification, Postoperative Complications, Sulfonamides therapeutic use
- Abstract
Two patients had uneventful phacoemulsification. After initial improvement, vision deteriorated because of cystoid macular edema (CME). In 1 patient, treatment with systemic nonsteroidal antiinflammatory drugs showed significant improvement in visual acuity but had to be discontinued because of side effects and a relapse of the disease. In the other patient, this therapy was not sufficient. Both patients were given valdecoxib, a cyclooxygenase-2 inhibitor. The new therapy was tolerated well and led to significant and stable improvement in visual acuity in both patients. To our knowledge, this is the first report of using a cyclooxygenase-2 inhibitor in the treatment of clinically significant CME.
- Published
- 2005
- Full Text
- View/download PDF
11. Endothelial cell loss after autologous rotational keratoplasty.
- Author
-
Birnbaum F, Reinhard T, Böhringer D, and Sundmacher R
- Subjects
- Adult, Cell Count, Cell Death, Corneal Diseases surgery, Humans, Rotation, Transplantation, Autologous, Endothelium, Corneal pathology, Keratoplasty, Penetrating adverse effects, Postoperative Complications
- Abstract
Purpose: To investigate whether it may be possible to ascertain the influence of immunological factors on chronic endothelial cell loss by comparing chronic endothelial cell loss after autologous rotational penetrating keratoplasty and after homologous penetrating keratoplasty., Methods: For six patients who had undergone autologous rotational penetrating keratoplasty the relative annual loss of endothelial cells was calculated by means of an exponential regression analysis. The findings were compared with those in a homogeneous historical control group (53 patients undergoing homologous penetrating keratoplasty for keratoconus)., Results: After autologous rotational keratoplasty relative annual loss of endothelial cells was 1.1%+/-2.6% (mean +/- standard deviation). Relative annual loss of endothelial cells in the control-group was 16.7%+/-20.8%., Conclusions: The results of the study lead to the assumption that immunological influences might be the main cause for chronic endothelial cell loss after homologous penetrating keratoplasty.
- Published
- 2005
- Full Text
- View/download PDF
12. Heterogeneous outcomes of liver disease after heart transplantation for a failed Fontan procedure
- Author
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Charles E. Canter, Chesney Castleberry, Janet Scheel, Rebecca K. Ameduri, Jean A Ballweg, Kathleen E. Simpson, Elizabeth S Makil, Janis Stoll, Geetika Khanna, Yumirle P. Turmelle, Brian F Birnbaum, Matthew T Kimberling, Aecha M Ybarra, and Vernat Exil
- Subjects
Male ,medicine.medical_specialty ,Cirrhosis ,Adolescent ,Patient demographics ,medicine.medical_treatment ,Biopsy ,Fontan Procedure ,Gastroenterology ,Fontan procedure ,Liver disease ,Young Adult ,Postoperative Complications ,Fibrosis ,Internal medicine ,medicine ,Humans ,Child ,Retrospective Studies ,Heart transplantation ,Transplantation ,medicine.diagnostic_test ,business.industry ,Liver Diseases ,Isolated heart ,medicine.disease ,Liver biopsy ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Heart Transplantation ,Female ,business - Abstract
Background Fontan-associated liver disease (FALD) uniformly affects patients with long-term Fontan physiology. The effect of isolated heart transplant (HT) on the course of FALD post-HT is not well understood. Methods We evaluated serial liver imaging pre- and post-HT to assess liver changes over time in a single-center retrospective analysis of Fontan HT recipients who had pre- and ≥1-year post-HT liver imaging. Available patient demographic and clinical data were reviewed, including available liver biopsy results. Results Serial liver imaging was available in 19 patients with a median age at HT of 12 years (range 3-23), the median age from Fontan to HT of 5.7 years (range 0.8-16), and the median time from imaging to follow up of 27 months (range 12-136 months). Pre-HT liver imaging was classified as follows: normal (n=1), congested (n=9), fibrotic (n=7), and cirrhotic (n=2). The majority of transplanted patients (15/19) had improvement in their post-HT liver imaging, including 13 patients with initially abnormal imaging pre-HT having normal liver imaging at follow-up. One patient had persistent cirrhosis at 26-month follow-up, one patient had unchanged fibrosis at 18-month follow-up, and one patient progressed from fibrosis pre-HT to cirrhosis post-HT at 136 months. No patients had overt isolated liver failure during pre- or post-HT follow-up. Liver biopsy did not consistently correlate with imaging findings. Conclusions Post-HT liver imaging evaluation in Fontan patients reveals heterogeneous liver outcomes. These results not only provide evidence for the improvement of FALD post-HT but also show the need for serial liver imaging follow-up post-HT.
- Published
- 2021
13. Long-term follow-up of astigmatic keratotomy for corneal astigmatism after penetrating keratoplasty
- Author
-
Thomas Reinhard, F. Birnbaum, Daniel Böhringer, Philipp Eberwein, Philip Maier, Nina Dineva, and Thomas Kirschkamp
- Subjects
Adult ,Male ,medicine.medical_specialty ,Visual acuity ,Corneal Pachymetry ,Visual Acuity ,Astigmatism ,Refraction, Ocular ,Corneal Diseases ,law.invention ,Cornea ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,law ,Ophthalmology ,otorhinolaryngologic diseases ,medicine ,Humans ,Corneal pachymetry ,Aged ,Keratotomy, Radial ,Retrospective Studies ,medicine.diagnostic_test ,Keratometer ,business.industry ,Corneal Topography ,General Medicine ,Middle Aged ,Corneal topography ,medicine.disease ,medicine.anatomical_structure ,030221 ophthalmology & optometry ,Optometry ,Female ,medicine.symptom ,business ,Corneal astigmatism ,Keratoplasty, Penetrating ,030217 neurology & neurosurgery ,Follow-Up Studies - Abstract
Purpose To report the long-term stability of paired arcuate corneal keratotomies (AKs) in patients with high regular postpenetrating keratoplasty astigmatism. Methods Retrospective chart review of best-corrected visual acuity, refraction and keratometric values of 41 eyes with AK between 2003 and 2012. Results Magnitude of median target induced astigmatism vector was 9.2 dioptres (Dpt). We reached a median magnitude of surgically induced astigmatism vector of 9.81 Dpt and a median magnitude of difference vector of 5.5 Dpt. In keratometry, we achieved a net median astigmatism reduction by 3.3 Dpt. The average correction index was 1.14, showing a slight overcorrection. Irregularity of keratometric astigmatism increased by 0.6 Dpt, and spherical equivalent changed by 1.75 Dpt. Monocular best spectacle corrected visual acuity increased from preoperatively 20/63 (0.5 logMAR) to 20/40 (0.3 logMAR) postoperatively. Median gain on the ETDRS chart was two lines. Long-term follow-up showed a median keratometric astigmatic increase by 0.3 Dpt per year. Conclusion Arcuate corneal keratotomies is a safe and effective method to reduce high regular corneal astigmatism following penetrating keratoplasty but has limited predictability. The long-term follow-up shows an increase of keratometric astigmatism by 0.3 Dpt/year, equalizing the surgical effect after 10 years.
- Published
- 2016
14. [Not Available]
- Author
-
F, Birnbaum
- Subjects
Evidence-Based Medicine ,Phacoemulsification ,Postoperative Complications ,Treatment Outcome ,Anti-Inflammatory Agents, Non-Steroidal ,Humans ,Laser Therapy ,Cataract - Published
- 2016
15. Comparison of Long-Term Outcomes of Femtosecond Laser-Assisted Keratoplasty with Conventional Keratoplasty
- Author
-
Thomas Reinhard, Daniel Böhringer, Philip Maier, Philipp Eberwein, Moritz Claudius Daniel, and F. Birnbaum
- Subjects
Adult ,Male ,Keratoconus ,Visual acuity ,Visual Acuity ,Astigmatism ,03 medical and health sciences ,0302 clinical medicine ,Postoperative Complications ,Laser therapy ,Long term outcomes ,Medicine ,Humans ,Keratoplasty penetrating ,Retrospective Studies ,business.industry ,Fuchs' Endothelial Dystrophy ,Graft Survival ,Suture Techniques ,Corneal Endothelial Cell Loss ,Middle Aged ,medicine.disease ,Laser assisted ,Ophthalmology ,Femtosecond ,030221 ophthalmology & optometry ,Optometry ,Female ,Laser Therapy ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Keratoplasty, Penetrating - Abstract
Astigmatism is a significant problem in penetrating keratoplasty. Lower astigmatism and better visual outcomes had been expected from laser-assisted penetrating keratoplasty, that is, from the top-hat, mushroom, or zig-zag cutting profiles. We report the long-term outcomes of 141 femtosecond laser-assisted penetrating keratoplasties retrospectively. We compare these outcomes with those of penetrating keratoplasty using the guided trephine system (GTS).In all, 141 femtosecond laser-assisted penetrating keratoplasties had been performed in 119 patients. The results were compared with those of conventional keratoplasty (n = 1254; visual and refractive outcomes, graft rejections, and graft failure).Follow-up averaged 33 months. In eyes with keratoconus, the time to achieve a visual acuity of 10/20 (Snellen) was shorter in the mushroom than in the GTS group. However, there was no relevant long-term difference. Graft astigmatism was higher in the laser groups [keratometric astigmatism at the end of follow-up: -4.5 ± 4 (GTS), -5.8 ± 3.3 (top-hat), -5.9 ± 3.2 D (mushroom); P0.01]. In eyes with keratoconus, rates of graft rejection were highest in the mushroom group (55%). In the other groups, top-hat keratoplasty resulted in lower rates of rejection than GTS keratoplasty (31%).There is no significant difference in the refractive and visual outcomes after femtosecond laser-assisted penetrating keratoplasty compared with GTS keratoplasty. The benefits from the use of the femtosecond laser may be limited and should be weighed against an increased risk of immune reactions, higher surgical complexity, and higher costs.
- Published
- 2016
16. Endothelial cell loss after autologous rotational keratoplasty
- Author
-
F. Birnbaum, Daniel Böhringer, Thomas Reinhard, and Rainer Sundmacher
- Subjects
Adult ,Keratoconus ,medicine.medical_specialty ,Rotation ,Endothelium ,Cell Count ,Exponential regression ,Transplantation, Autologous ,Corneal Diseases ,Cellular and Molecular Neuroscience ,Postoperative Complications ,Ophthalmology ,Homologous chromosome ,Humans ,Medicine ,Cell Death ,business.industry ,Endothelium, Corneal ,medicine.disease ,Sensory Systems ,Endothelial stem cell ,Transplantation ,medicine.anatomical_structure ,Immunological Factors ,Homogeneous ,business ,Keratoplasty, Penetrating - Abstract
To investigate whether it may be possible to ascertain the influence of immunological factors on chronic endothelial cell loss by comparing chronic endothelial cell loss after autologous rotational penetrating keratoplasty and after homologous penetrating keratoplasty.For six patients who had undergone autologous rotational penetrating keratoplasty the relative annual loss of endothelial cells was calculated by means of an exponential regression analysis. The findings were compared with those in a homogeneous historical control group (53 patients undergoing homologous penetrating keratoplasty for keratoconus).After autologous rotational keratoplasty relative annual loss of endothelial cells was 1.1%+/-2.6% (mean +/- standard deviation). Relative annual loss of endothelial cells in the control-group was 16.7%+/-20.8%.The results of the study lead to the assumption that immunological influences might be the main cause for chronic endothelial cell loss after homologous penetrating keratoplasty.
- Published
- 2004
17. Clinical results of 123 femtosecond laser-assisted penetrating keratoplasties
- Author
-
Antonia Wiggermann, Philip Maier, F. Birnbaum, Daniel Böhringer, and Thomas Reinhard
- Subjects
Adult ,Graft Rejection ,Male ,medicine.medical_specialty ,Materials science ,genetic structures ,medicine.medical_treatment ,Prednisolone ,Visual Acuity ,Astigmatism ,Refraction, Ocular ,law.invention ,Corneal Diseases ,Fluocortolone ,Cellular and Molecular Neuroscience ,Optics ,Postoperative Complications ,law ,Ophthalmology ,medicine ,Postoperative outcome ,Humans ,Glucocorticoids ,Corneal transplantation ,Wound Healing ,medicine.diagnostic_test ,business.industry ,Suture Techniques ,Corneal Topography ,Middle Aged ,equipment and supplies ,Laser ,Corneal topography ,Laser assisted ,medicine.disease ,eye diseases ,Sensory Systems ,Treatment Outcome ,Penetrating Keratoplasties ,Femtosecond ,Female ,sense organs ,Laser Therapy ,business ,Keratoplasty, Penetrating ,Tomography, Optical Coherence - Abstract
Postoperative astigmatism following penetrating keratoplasty is a major problem after corneal transplantation. The main goal of new trephination techniques such as femtosecond laser or excimer-laser trephination is to improve refractive and visual outcomes. The femtosecond laser technique makes profiled corneal trephinations such as the top hat or mushroom profile possible. We present the postoperative outcome of femtosecond laser-assisted penetrating keratoplasties.We performed 123 femtosecond laser-assisted penetrating keratoplasties in 119 patients. The main outcome measures were intraoperative specifics, astigmatism, and irregularity in Orbscan corneal topography, as well as the occurrence of immune reactions and side-effects.All sutures have been removed in 49 of these 123 eyes. Their mean follow-up was 13.9 ± 4.5 months. Time to complete suture removal (n = 49) was 12.0 ± 3.7 months in the mushroom group and 9.8 ± 2.1 months in the top hat group. Mean astigmatism in Orbscan topography was 6.4 ± 3.0 diopters in the mushroom and 5.8 ± 4.6 diopters in the top hat group (all sutures out).Femtosecond laser-assisted penetrating keratoplasty is a safe surgical technique. Due to the steps in profiled trephinations, the wound area is larger and theoretically the wound healing is, thus, faster and more stable. Complete suture removal is possible at an earlier time point compared to conventional penetrating keratoplasty. However, refractive results are not superior to those following conventional trephination.
- Published
- 2012
18. [Perspectives of femtosecond laser-assisted keratoplasty]
- Author
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F, Birnbaum, P, Maier, and T, Reinhard
- Subjects
Microsurgery ,Wound Healing ,Sutures ,Corneal Surgery, Laser ,Visual Acuity ,Astigmatism ,Equipment Design ,Epikeratophakia ,Corneal Diseases ,Corneal Transplantation ,Postoperative Complications ,Tissue and Organ Harvesting ,Humans ,Descemet Stripping Endothelial Keratoplasty ,Keratoplasty, Penetrating ,Tomography, Optical Coherence ,Follow-Up Studies - Abstract
The femtosecond laser technique allows completely new trephination procedures in penetrating and lamellar keratoplasty. With femtosecond laser-assisted penetrating keratoplasty it is possible to perform profiled trephination, such as top hat and mushroom profiles. Thus, it is easier to get a watertight wound closure intraoperatively and due to the larger wound surface wound healing is faster and allows early complete suture removal. In lamellar keratoplasty the femtosecond laser enables the surgeon to cut to any depth in the corneas resulting in thin corneal donor buttons, e.g. for DSAEK. In this manuscript an overview is given of the state of the art and of the perspectives of femtosecond laser keratoplasty.
- Published
- 2011
19. The intrastromal corneal ring in penetrating keratoplasty-long-term results of a prospective randomized study
- Author
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F. Birnbaum, Thomas Reinhard, Daniel Böhringer, and Johannes Schwartzkopff
- Subjects
medicine.medical_specialty ,medicine.medical_treatment ,Corneal Stroma ,Visual Acuity ,Astigmatism ,Keratoconus ,law.invention ,Prosthesis Implantation ,Vitallium ,Postoperative Complications ,Randomized controlled trial ,Suture (anatomy) ,law ,Ophthalmology ,medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Adverse effect ,Corneal transplantation ,Dioptre ,Titanium ,medicine.diagnostic_test ,business.industry ,Fuchs' Endothelial Dystrophy ,Corneal Topography ,Prostheses and Implants ,Corneal topography ,medicine.disease ,eye diseases ,Treatment Outcome ,business ,Keratoplasty, Penetrating ,Follow-Up Studies - Abstract
PURPOSE Postoperative astigmatism after penetrating keratoplasty is a major problem in corneal transplantation. The purpose of this prospective randomized study was to evaluate the efficacy and safety of an intrastromal corneal ring after penetrating keratoplasty. METHODS Twenty patients were included, 10 of whom received an intracorneal ring (group 1) and 10 who did not (group 2, control group). Astigmatism in Orbscan corneal topography, occurrence of immune reactions, and occurrence of side effects were this study's main outcome criteria. RESULTS Mean follow-up time was 27.6 ± 5.3 months. Mean astigmatism (Orbscan) was 4.4 diopters in group 1 and 4.4 diopters in group 2 (P = 0.695). Spontaneous suture rupture occurred in 5 patients with corneal ring but in none of those in the control group. We observed 3 immune reactions in 3 patients with corneal ring, whereas group 2 experienced no rejection (P < 0.05). Endothelial cell loss was 15.1% in the group with the ring and 8.7% in the control group. That difference was not statistically significant (P = 0.146). CONCLUSIONS The use of the intrastromal corneal ring after penetrating keratoplasty caused no reduction in postoperative astigmatism. However, its use was statistically significantly associated with adverse events.
- Published
- 2011
20. [Femtosecond laser-assisted penetrating keratoplasty]
- Author
-
F, Birnbaum, P, Maier, and T, Reinhard
- Subjects
Postoperative Complications ,Fuchs' Endothelial Dystrophy ,Keratomileusis, Laser In Situ ,Suture Techniques ,Astigmatism ,Humans ,Equipment Design ,Keratoconus ,Refraction, Ocular ,Keratoplasty, Penetrating - Abstract
The femtosecond laser technique allows completely new trephination methods in penetrating keratoplasty with profiles in the graft and the host cornea. The most common so-called profiled trephinations are the top hat and mushroom profiles. Due to the profile it is easier to get a watertight wound closure intraoperatively and due to the larger wound surface the wound healing is faster and more stable. This will possibly allow an earlier suture removal with final visual rehabilitation. First clinical results show that femtosecond laser-assisted penetrating keratoplasty is a safe surgical procedure. The long term results after complete suture removal will show whether the astigmatism results are better than those of conventional trephination techniques.
- Published
- 2009
21. [Systemic immunosuppressives after penetrating keratoplasty]
- Author
-
A, Reis, F, Birnbaum, and T, Reinhard
- Subjects
Graft Rejection ,Corneal Opacity ,Postoperative Complications ,Administration, Topical ,Administration, Oral ,Animals ,Humans ,Ophthalmic Solutions ,Infusions, Intravenous ,Immunosuppressive Agents ,Keratoplasty, Penetrating - Abstract
Immunologic rejection is the main cause of corneal graft failure. If corneal transplantation is performed in a high-risk situation without the use of systemic immunosuppression, corneal graft failure has to be expected in over 50% of patients within the first postoperative year. The clonal expansion of graft-specific lymphocytes occurs in lymphoid tissues. As topical steroids do not reach the secondary lymphoid organs, and even systemic steroids do not interfere sufficiently with the clonal expansion of activated T cells, it is essential to administer systemic immunosuppressives in order to achieve clear graft survival. As corneal transplantation is not a life-saving procedure, the profile of side-effects is a central issue when choosing an immunosuppressive medication.
- Published
- 2007
22. [Topical immunosuppressives after penetrating keratoplasty]
- Author
-
F, Birnbaum, A, Reis, and T, Reinhard
- Subjects
Graft Rejection ,Corneal Opacity ,Postoperative Complications ,Administration, Topical ,Graft Survival ,Animals ,Humans ,Immunosuppressive Agents ,Keratoplasty, Penetrating - Abstract
Topical steroids are routinely used in the postoperative treatment following penetrating keratoplasty. Due to the known side effects such as steroid-response glaucoma, cataract, and surface disorders, a broader armamentarium of topical immunomodulating drugs with comparable efficacy, better tolerance and less side effects is desirable. Cyclosporine A and FK506 eye drops are a promising alternative. A new approach involves subconjunctival drug delivering implants and locally applied antiangiogenic substances, which still have to be tested in clinical studies.
- Published
- 2007
23. [Immune suppression following perforating keratoplasty]
- Author
-
F, Birnbaum, A, Reis, and T, Reinhard
- Subjects
Graft Rejection ,Corneal Opacity ,Postoperative Complications ,Graft Survival ,Humans ,Drug Therapy, Combination ,Prognosis ,Immunosuppressive Agents ,Keratoplasty, Penetrating - Published
- 2007
24. Successful treatment of cystoid macular edema with valdecoxib
- Author
-
Thomas Reinhard, Lutz L. Hansen, F. Birnbaum, and Alexander Reis
- Subjects
Male ,medicine.medical_specialty ,Visual acuity ,genetic structures ,medicine.medical_treatment ,Eye disease ,Visual Acuity ,Macular Edema ,Postoperative Complications ,Lens Implantation, Intraocular ,Ophthalmology ,medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Macular edema ,Aged ,Aged, 80 and over ,Sulfonamides ,Phacoemulsification ,Cyclooxygenase 2 Inhibitors ,business.industry ,Isoxazoles ,Middle Aged ,medicine.disease ,Valdecoxib ,eye diseases ,Sensory Systems ,Surgery ,Clinical trial ,Female ,sense organs ,medicine.symptom ,business ,Retinopathy ,medicine.drug - Abstract
PURPOSE: To evaluate the safety and efficacy of the COX-2 inhibitor valdecoxib in treating macular edema after cataract surgery. SETTING: University Eye Clinic, Freiburg, Germany and Reis Medical Institution, Liechtenstein. METHODS: The COX-2 inhibitor valdecoxib (Bextra) was administered systemically to patients with significant visual loss resulting from macular edema in a prospective clinical trial. RESULTS: Ten patients were enrolled. Valdecoxib was tolerated well and led to a significant visual improvement within 10 days of therapy in all patients. CONCLUSION: The fast and persistent control of macular edema with valdecoxib warrants further investigation.
- Published
- 2006
25. [Percutaneous transfemoral implantation of a new, flexible thoracic aorta endoprosthesis using a percutaneous suture system for vascular suture--initial experiences]
- Author
-
C, Manke, R, Kobuch, M, Lenhart, M, Strotzer, J, Merk, F, Birnbaum, S, Feuerbach, and J, Link
- Subjects
Aged, 80 and over ,Male ,Wound Healing ,Aortic Aneurysm, Thoracic ,Suture Techniques ,Angiography, Digital Subtraction ,Surgical Instruments ,Aortography ,Hemostasis, Surgical ,Femoral Artery ,Aortic Dissection ,Blood Vessel Prosthesis Implantation ,Postoperative Complications ,Image Processing, Computer-Assisted ,Humans ,Female ,Stents ,Tomography, X-Ray Computed ,Angioplasty, Balloon ,Aged - Abstract
To evaluate the transfemoral placement of a new, flexible stent-graft into the thoracic aorta and the suture-mediated closure of the femoral access.Five patients were treated endovascularly with a stent-graft for an aneurysm (n = 3) or acute dissection (n = 2) of the thoracic aorta via a femoral 24 F sheath. The femoral access site was closed with two suture-mediated closure devices after placement of the stent-graft.The aneurysm or the false lumen was excluded from perfusion by the placement of the stent-graft in all patients. Hemostasis at the femoral access site was successful in all patients with the percutaneous suture device. A minor stenosis of the femoral artery was found angiographically in four patients after suture-mediated closure. Besides a reversible renal failure due to the medically induced hypotension for the treatment of an acutely ruptured aneurysm, no complications resulted from the stent-graft placement or the percutaneous suture.The percutaneous transfemoral placement of stent-grafts in the thoracic aorta using a suture-mediated closure of the access site is technically feasible. Long-term results of the technique have to be awaited.
- Published
- 2001
26. [Combination of retinal surgery with serious perforating injuries (author's transl)]
- Author
-
J, Faulborn and F, Birnbaum
- Subjects
Adult ,Microsurgery ,Eye Injuries ,Postoperative Complications ,Fundus Oculi ,Methods ,Retinal Detachment ,Humans ,Retina ,Follow-Up Studies - Published
- 1974
27. [Cyclocryotherapy of haemorrhagic glaucoma: clinical long time and histopathologic results (author's transl)]
- Author
-
J, Faulborn and F, Birnbaum
- Subjects
Necrosis ,Postoperative Complications ,Time Factors ,Humans ,Glaucoma ,Hemorrhage ,Middle Aged ,Eye ,Cryosurgery ,Intraocular Pressure ,Aged - Abstract
67 eyes with a haemorrhagic glaucoma have been treated with different methods of cyclocryotherapy. 54 of the 67 patients were painless after a follow-up from 6 to 53 months. In 49 eyes the intraocular tension was under 25 mm Hg regardless of the applicationmethod used. 9 of the 67 eyes were found to be phthistic most of them in the series with the longest follow-up. The histopathologic findings of 8 eyes which had been excised after different postoperative periods show severe necrosis and chronic tissue reaction following cyclocryotherapy.
- Published
- 1977
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