THE OS4 IN GLAUCOMA SURGERY
The OS 4 provides an option for surgical treatment of glaucoma in micro‑invasive glaucoma surgery (MIGS). High-Frequency Deep Sclerotomy (HFDS) creates a direct access between the anterior chamber and the Schlemm canal that bypasses the outflow resistance of the trabecular meshwork. The HFDS glaucoma tip is inserted through a 1.2‑mm paracentesis and six small sclerotomy pockets are formed in the iridocorneal angle to improve the outflow of the aqueous fluid.
How does HFDS work?
|Diathermie hand piece, reusable|
|VE201710||Diathermy handpiece, long, reusable|
|VE201712||Diathermy handpiece, short, reusable|
|HFDS glaucoma tip, reusable|
|VE201751||HFDS glaucoma tip, reusable|
Advantages of HFDS®
- Implant‑free micro‑invasive glaucoma surgery
- Impressive long-term results with a stable and
long-term reduction in IOP and AGM
- Short procedure time with high safety profile[2, 8, 14]
- Combined with cataract surgery or a stand-alone
You want to know more?
High Frequency Deep Sclerotomy, Dr Florian Sutter, Ophthalmology Times Europe, 2022
Triggerfish Recording of IOP Patterns in Combined HFDS Minimally Invasive Glaucoma and Cataract Surgery, Journal of Clinical Medicine, 2021
Ab Interno Approach with No Implant Needed, The Ophthalmologist, 2021
High-Frequency Deep Sclerotomy, A Minimal Invasive Ab Interno Glaucoma Procedure Combined with Cataract Surgery: Physical Properties and Clinical Outcome, Eye Clinic Orasis, 2019
The Efficacy and Safety of High-Frequency Deep Sclerotomy in Treatment of Chronic Open-Angle Glaucoma Patients, Research Institute of Ophthalmology Cairo, Cairo University Faculty of Medicine, 2019
Ab-Interno Deep Sclerotomy in Eight Simple Steps, Cataract & Refractive Surgery Today Europe, 2017
HFDS Glaucoma Procedure, Dr. Bojan Pajic, European Opthalmic Review, 2012
New Minimally Invasive, Deep Sclerotomy ab interno Surgical Procedure for Glaucoma, Six Years of Follow-up, Dr. Bojan Pajic, Journal of Glaucoma, 2011
The Future Way of Phaco & MIGS Surgeries - Highlights from ESCRS Satellite Symposium, The Ophthalmologist, 2015
MAKING THE DIFFERENCE WITH UNIQUE ADVANTAGES
«HFDS offers three unique advantages in glaucoma surgery.
First, in about 70% of cases no postoperative treatment with medication is required. The second and biggest advantage in my opinion is that trabeculotomy and trabeculoplasty can be replaced by HFDS. Third, HFDS and phaco act additively and thus an IOP reduction of up to 13 mmHg can be achieved.»Dr. Gonzalo Murillo AzcarragaInstituto Privado de Oftalmología La Paz, Bolivia
MAKING THE DIFFERENCE WITH A MODERN GLAUCOMA METHOD
«Thanks to the modern HFDS method from Oertli, I am able to work quick and safe with little effort. It is also a good alternative to implants or filter surgery. The result speaks for itself - many patients are well regulated even after months without glaucoma drops.»PD Dr. med. Hans-Joachim HettlichAugen Praxisklinik Minden, Germany
MAKING THE DIFFERENCE WITH EXCELLENT LONG-TERM RESULTS
«HFDS convinces me because the procedure is very easy to perform, highly controllable and with few complications. Thanks to HFDS, excellent long-term results are achieved, resulting in fewer follow-up treatments for patients.»Dr. med., F.E.B.O. Lutz BlombergAugenzentrum Hildesheim-Alfeld, Germany
MAKING THE DIFFERENCE IN GLAUCOMA SURGERY
«For me, HFDS is an easy to apply MIGS solution, which convinces not only because of the fast rehabilitation post-op. High frequency diathermy is used to reduce the outflow resistance and shows excellent eye pressure reduction. HFDS can be excellently combined with cataract surgery.»Prof. Bojan PajicEye Clinic Orasis, Reinach, Switzerland
Innovations such as HF capsulotomy and easyPhaco are developments that aim to make cataract surgery faster and more efficient.
Oertli data on file
 B. Pajic, B. Pajic-Eggspuehler, and I. Haefliger, “New minimally invasive, deep sclerotomy ab-interno surgical procedure for glaucoma, six years of follow-up,” Journal of glaucoma, vol. 20, no. 2, pp. 109–114, 2011, doi: 10.1097/IJG.0b013e3181dddf31.
 B. Pajic, Z. Cvejic, K. Mansouri, M. Resan, and R. Allemann, “High-Frequency Deep Sclerotomy, A Minimal Invasive Ab-interno Glaucoma Procedure Combined with Cataract Surgery: Physical Properties and Clinical Outcome,” Applied Sciences, vol. 10, no. 1, p. 218, 2020, doi: 10.3390/app10010218.
 Kaweh Mansouri, M.D., M.P.H., A Multicenter Prospective Study of High-Frequency Deep Sclerotomy (HFDS) in Open-Angle Glaucoma: 3-Year Outcomes: Manuskript; UNPUBLISHED DATA.
 Aleksandar Pavlovic, Ab-Interno Deep Sclerotomy in Eight Simple Steps. [Online]. Available: https://www.oertli-instruments.com/downloads/glaukom/crst_september_2017_ab-interno_deep_sclerotomy_in_eight_simple_steps.pdf