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Author: Brady MD; Hustead RR; RobinsonRH; Becker KE Jr, Department of Anesthesiology, University of Kansas School of Medicine-Wichita 67214
Publication: Reg Anesth 1994 May-Jun;19(3):196-8
BACKGROUND AND OBJECTIVES: Proparacine (P), 0.5%, is often applied topically to the eye to diminish the pain of injection of anesthetic for eye surgery; however, application of 0.5% P itself can cause some degree of discomfort. This study evaluated the use of balanced salt solution to dilute P before instillation in the eye to prevent discomfort.
METHODS: In a double-blinded manner, 42 consenting adults about to undergo cataract surgery were given 0.5% P in one eye and 0.03% P in the other eye. One minute later the same solutions were instilled into each eye. Ten minutes later, 0.5% P was instilled into both eyes. After each instillation the patients were asked to describe the pain in each eye on a 0 to 10 scale.
RESULTS: Those receiving 0.5% as the first drop had a mean score of 1.28, which was greater than the score of 0.09 for the 0.03% P group (P<.01). No one reported pain after the second drop was applied 1 minute later. After receiving 0.5% P 10 minutes later, the group that received 0.5% P reported a mean pain score of 0.09 while those who had received 0.03% P reported a score of 0.76, which was significantly greater than that reported by the 0.5% P group after the 10 minute instillation (P<.01) but significantly lower than the score reported after the first instillation of 0.5% P (P<.05). CONCLUSIONS: Dilution of P in balanced salt solution to a concentration of 0.03% produces a solution that is significantly less painful than 0.5% P and reduces the discomfort of the instillation of 0.5% P.
I just spent three hours in the ER. The trip to the ER was precipitated by my getting a mixture of bleach, Mr. Clean and water in my left eye while scrubbing the soffits of the siding on my house. Whilst in the ER, I had my eye irrigated twice with a 0.9% solution of NaCl using the Morgan Lens to facilitate the irrigation. THANK YOU for creating the Morgan Lens. My eye felt so much better after the second round of irrigation, and it did take two rounds before the pH level in my eye returned to normal. I know companies always hear about the things that go wrong with their equipment. I want you to know that your equipment did something wonderful, and I want you to know how very much I appreciate it.Patient - Platteville, WI
The Morgan Lens is used in 90% of hospital emergency departments in the USA and can be inserted in less than 20 seconds. There simply is no other "hands-free" method of eye irrigation. Nothing else frees medical personnel to treat other injuries or to transport the patient while irrigation is underway. Nothing is more effective at treating ocular chemical, thermal, and actinic burns or removing non-embedded foreign bodies, even when the patient's eyes are closed tightly. Its design makes it simple and straightforward to use so minimal training is required.