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ARTICLES
Year : 1974  |  Volume : 22  |  Issue : 4  |  Page : 30

An improved blade-breaker and holder


Department of Ophthalmology, Medical College, Amritsar, India

Correspondence Address:
Daljit Singh
Department of Ophthalmology, Medical College, Amritsar
India
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Source of Support: None, Conflict of Interest: None


PMID: 4465304

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How to cite this article:
Singh D. An improved blade-breaker and holder. Indian J Ophthalmol 1974;22:30

How to cite this URL:
Singh D. An improved blade-breaker and holder. Indian J Ophthalmol [serial online] 1974 [cited 2020 Feb 20];22:30. Available from: http://www.ijo.in/text.asp?1974/22/4/30/31343

For easy breaking and holding of safety ­blade pieces, many blade-breakers are availa­ble in the market. Most of them consist of portions joined together by a screw joint just behind the catching ends. A pressure-catch or hook is incorporated in the handle of the instrument. The blade-breakers are available with a variety of working ends (the blades). Some blades are smooth surfaced, others have a diamond finish and still others have been inlaid with copper.

The available blade-breakers and holders suffer from two defects :-Firstly, after some use the instruments do not hold as well as before, so that when pressure is applied on the blade, it slips. Secondly, the screw joint of the instrument is subject to increasing "play" with passage of time, which further decreases the hold of the instrument.

To overcome these shortcomings, two changes have been introduced in the new instrument. Instead of a screw joint, a box type of joint, as is found in artery forceps, has been [Figure - 1] introduced. With this type of joint, there is practically no chance of "play" developing in the instrument. For a fast hold on the safety-blade, by the working ends of the insrument, a number of designs were tried which included punching devices and various holding surfaces which could deform the sur­face of the blade piece, behind the cutting point, so that it could resist slipping under pressure. It was found that if one side of the instrument had an oval elevation and the other side a corresponding depression, then the grip on the safety blade was extremely strong [Figure - 2]. The slightly deformed surface of safety-blade piece resists pressure and does not slip.

The instrument is being manufactured by Speedway Surgical Company, Bhagirath Palace, Delhi-6.


    Figures

  [Figure - 1], [Figure - 2]



 

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