HFDS stands for High Frequency Deep Sclerotomy. In micro-invasive glaucoma surgery (MIGS), HFDS creates direct access from the anterior chamber to the Schlemm’s canal and further into the sclera. The resistance of the trabecular meshwork is thus bypassed. The HFDS glaucoma tip is inserted through 1.2 mm paracentesis and, by means of diathermy output, it creates six small sclerotomy pockets in the iridocorneal angle, ensuring improved outflow of aqueous fluid.

HFDS can be used individually and can also be ideally combined with cataract surgery. HFDS is characterised by a very short intervention time. Bleb formation is prevented, and so is fibroblast movement to the sclerotomy. Moreover, there are no corneal scars. Oertli’s High Frequency Deep Sclerotomy boasts excellent long-term results. If required, a further HFDS intervention can be made to optimise results.

• Ideal in combination with cataract surgery or as individual application
• Very short intervention time
• Excellent long-term results
• No bleb-formation, no corneal scars
• Surgery can be repeated
• Very low complication rate

TO THE PRODUCT FINDER

The HFDS (High Frequency Deep Sclerotomy) procedure is an implant-free MIGS procedure to lower intraocular pressure by reducing the outflow resistance of the aqueous humour. In this animation, all surgical steps of the HFDS procedure are explained.

Clinical studies confirm a long-term significant reduction in the IOP with a considerable reduction in the number of antiglaucoma medication (AGM) [1]. Together with the low complication rates, HFDS is a safe and efficient glaucoma procedure [1, 2, 3].

_{[1] 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.}

_{[2] 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.}

_{[3] 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Prospective Study of High-Frequency Deep Sclerotomy (HFDS) in Open-Angle Glaucoma: 3-Year Outcomes: Manuskript; UNPUBLISHED DATA.}

With HFDS, a reduction in intraocular pressure is already noticeable in the first few days after the operation. In the following video you will learn why you do not need pressure-reducing eye drops and how the reduction in intraocular pressure is measured using the latest studies.