Fine ParaTrap Diamond Knife

These diamonds are miniature versions of Mastel Surgical’s renowned Gimbel SuperStealth trapezoid diamonds used for phaco wounds. They provide excellent piercing control, allowing surgeons to enter the anterior chamber to precisely achieve the desired wound size. For iris hook placement, the tip can create a minimal internal ostium, with further controlled entry as needed for routine technique. The sides remain sharp well posteriorly, enabling easy wound enlargement when required, though this increases manufacturing complexity. This design is favored by Professor Alan Crandall.

“I have been using an ASICO diamond for side port creation for a number of years, and before I tried the Mastel Fine Triamond and Fine ParaTrap I had preferred a 0.8mm diamond. At the conclusion of the case I would always hydrate the side port to ensure closure; despite this technique, I would spend 15 to 30 seconds on each side port either re-hydrating or firmly holding pressure over the incision roof. I meticulously dried the incision edge, and if I still had even small leakage, I would place a 10-0 nylon suture (approximately 1.5-2% ).

Most recently I have been using a Paratrap in one instrument set and a Triamond in another set. My other two sets have 0.8mm ASICO diamonds. What I found was just amazing: I don’t even have to hydrate the paracentesis when I use a Mastel blade. I have had zero leaks in over 600 cases with these diamonds, and I have not had to suture one yet. My surgery day goes faster because I don’t spend the extra time at the end of the case trying to get the paracentesis to seal. Postoperatively, these side ports look much cleaner with little edema. I feel more assured that the side port is not going to be an issue on postop Day 1 for my patients. I also like the ability to titrate the paracentesis size with the Triamond; it works great for a second instrument or iris hooks (like for a Flomax case or pseudoexfoliation). Because these incisions seal so well, I think they would be advantageous for accommodating IOL cases because most of those lenses require an absolutely stable chamber to allow the IOL to remain in the intended location to achieve accommodation.” – Jason Jones, MD, Jones Eye Clinic, Sioux City, IA

“I must say that the Fine ParaTraps are really wonderful. They are sharp and very easy to use. I have used diamonds for 25 years and these are the best I have ever used. Small incisions sometimes are quite difficult to get watertight, but with these diamonds this really is not a problem. The wounds are closing spontaneously without any need for hydration. I must say that they are really brilliant!” – Leif Corydon, MD, PhD, Vejle, Denmark

“I have been using Mastel diamonds for many years and currently use the Fine ParaTrap trapezoidal blade for bimanual cataract surgery. The ParaTrap makes consistent and precise incisions and I would recommend these blades to all cataract surgeons.” – Ray T. Oyakawa, MD, Torrance, CA