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Aqueous Humor pH in Experimental Eye Burns and Influence of Different Treatment Measures

Author: U. Lauz und H. W. Roth, H. Krey, B. Steinhardt

Journal: Albrecht v. Graefes Arch. klin. exp. Ophtal. 195, 33-40 (1975) [Article in German]

Abstract: 300 rabbit corneas were burned for – 1 minute by applying a filter paper of 10mm diameter soaked in different concentrations of NaOH. The aqueous humor pH was then measured at certain time intervals and after different treatment methods until the physiologic pH of 7.6 was reached. The results were statistically analyzed. Group 1, 2 and 3 were burned with 1N NaOH and 6N NaOH respectively without any treatment. In these groups, a “therapeutic” pH-level of 8.5 was measured on an average 0.5, 2.5 and 5 hours after the burn. Group 4 and 5 again were burned with 6N NaOH. In Group 4, the burn was followed by constant irrigation with physiologic saline by means of the Morgan Lens®. With this regimen, a pH of 8.5 was reached after 2.5 hours. In Group 5, the physiologic saline solution was replaced by a buffer solution (Isogutt®) and a pH of 8.5 was measured after only one hour. Based upon these results, it is felt that severe lye burns should be treated by constant irrigation with a buffer solution for several hours, a treatment that can easily be performed by use of the Morgan Lens.

Thanks for the opportunity to sing the praises of the Morgan Lens! Those of us who have been in the field for a while wonder what we ever did without them!  We find two general uses for the lenses.   One is for contact irritation:  most typically, splashes.  After local anesthetic, for ease of insertion, the lenses fit comfortably on patients of all ages and provide gentle and thorough irrigation of irritant substances. We have many cases of this type.  The second most common use is for patients show suffer multiple injuries due to automobile accidents, major trauma, burns, falls, etc.  Not only does the lens thoroughly irrigate the eye, removing most or all of the debris that has accumulated, it more importantly frees up the nurse's hands so that she can perform other lifesaving functions.  Quite frankly, eye irrigation was treated as "the bottom of the list" often because other patient's other injuries were more devastating with higher morbidity and mortality.  Particularly in the burn patient, the soothing effect of the irrigation and potential to prevent infection or further injury, make it an easy to use, valuable asset for patient care.

Registered Nurse (Montana)

MorTan Inc.

Mailing Address:
P.O. Box 8719
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Why Use The Morgan Lens?

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.