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Special Needles for Electrolysis and Diathermy Operations for Retinal Detachments*
620
NOTES, CASES, INSTRUMENTS
difficult due to the fact that the needles were not tapered sufficiently. Special needles were devised to fit the Walker handle (fig. 1-A), made with a straight shaft with the needle emerging di CONRAD BERENS, M.D. rectly from the shaft. These needles are New York more easily manipulated, especially under an 1 The Greishaber needles of Vogt previous illuminated retractor. The needles which ly used in operations for the separation of are 1.0 to 2.5 mm. in length, when used the retina were found to be difficult to ma- with electrolysis, encourage the prolifera tion of the episcleral connective tissue into the wound which results in firm scars.2 These new needles are tapered and almost A conical; this construction, combined with unusually sharp points, facilitates penetra tion of the sclera without undue pressure even when only 1 or 2 milliamperes of cur B rent is employed. A second type of special retinal needle Fig. 1 (Berens). (A) Special needle for electrol ysis and diathermy for operations for retinal de has been made for tears near the optic nerve. tachments to fit Walker handle (1.0 to 2.5 mm. in The shaft, 30 mm. in length, fits into the length. (B) Special retinal needle for tears near Walker handle and the remainder is curved the optic nerve, curved to fit the normal contour of to fit the normal contour of the globe (fig. the globe. 1-B), and the needles (1.0 to 2.5 mm. in nipulate under various types of retractors and length) emerge directly from the shaft. The curved needle is especially valuable in spatulas because of the bend in the shaft. Furthermore, penetration into the sclera was facilitating the application of electrolysis or diathermy punctures in detachments near ♦This work was aided by a grant from the the macular region. Ophthalmological Foundation, Inc. The needles are 708 Park Avenue (21). made by V. Mueller & Co., Chicago. SPECIAL NEEDLES FOR ELEC TROLYSIS AND DIATHERMY OPERATIONS FOR R E T I N A L DETACHMENTS*
,*^S^i™i«*
REFERENCES
1 Berens, C: An illuminated retractor speculum. Tr. Am. Acad. Ophth., March-April, 1947. 2. Berens, C, Hall, D. S., Smith, B., and McAlpine, P. T.: Late results of operations for separation of the retina. Surg., Gynec. & Obst., 70 :454-465, (Feb.) 1940.
NOTES, CASES, INSTRUMENTS
difficult due to the fact that the needles were not tapered sufficiently. Special needles were devised to fit the Walker handle (fig. 1-A), made with a straight shaft with the needle emerging di CONRAD BERENS, M.D. rectly from the shaft. These needles are New York more easily manipulated, especially under an 1 The Greishaber needles of Vogt previous illuminated retractor. The needles which ly used in operations for the separation of are 1.0 to 2.5 mm. in length, when used the retina were found to be difficult to ma- with electrolysis, encourage the prolifera tion of the episcleral connective tissue into the wound which results in firm scars.2 These new needles are tapered and almost A conical; this construction, combined with unusually sharp points, facilitates penetra tion of the sclera without undue pressure even when only 1 or 2 milliamperes of cur B rent is employed. A second type of special retinal needle Fig. 1 (Berens). (A) Special needle for electrol ysis and diathermy for operations for retinal de has been made for tears near the optic nerve. tachments to fit Walker handle (1.0 to 2.5 mm. in The shaft, 30 mm. in length, fits into the length. (B) Special retinal needle for tears near Walker handle and the remainder is curved the optic nerve, curved to fit the normal contour of to fit the normal contour of the globe (fig. the globe. 1-B), and the needles (1.0 to 2.5 mm. in nipulate under various types of retractors and length) emerge directly from the shaft. The curved needle is especially valuable in spatulas because of the bend in the shaft. Furthermore, penetration into the sclera was facilitating the application of electrolysis or diathermy punctures in detachments near ♦This work was aided by a grant from the the macular region. Ophthalmological Foundation, Inc. The needles are 708 Park Avenue (21). made by V. Mueller & Co., Chicago. SPECIAL NEEDLES FOR ELEC TROLYSIS AND DIATHERMY OPERATIONS FOR R E T I N A L DETACHMENTS*
,*^S^i™i«*
REFERENCES
1 Berens, C: An illuminated retractor speculum. Tr. Am. Acad. Ophth., March-April, 1947. 2. Berens, C, Hall, D. S., Smith, B., and McAlpine, P. T.: Late results of operations for separation of the retina. Surg., Gynec. & Obst., 70 :454-465, (Feb.) 1940.