Specification of William Edward Gedge : syringe for subcutaneous extractions and injections.

  • Gedge, William Edward.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Edward Gedge : syringe for subcutaneous extractions and injections. Source: Wellcome Collection.

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    Gedge’s Improved Syringe. instrument in writing under my, or their, or one of their hands and seals, should particularly describe and ascertain the nature of the said Invention, and in what manner the same was to he performed, and cause the same to he filed in the Great Seal Patent Office within six calendar months next and immediately after the date of the said Letters 5 Patent. NOW KNOW YE, that I, the said William Edward Gedge, do hereby declare the nature of the said Invention, and in wdiat manner the same is to he performed, to he particularly described and ascertained in and by the following statement, reference being had to the accompanying 10 Sheet of Drawing, and to the figures and letters of reference placed thereon:— The apparatus the subject of this Invention will be found of great service to medical science for all subcutaneous operations. With this apparatus, termed by the Inventor “ a pneumatic aspirator,” it is easy 15 to penetrate with impunity into the depth of the tissues without fear of injuring the most delicate organs, to there discover serous, purulent, hematic, or urinous collections, and to ascertain by this exploration whether surgical intervention is useful, urgent, or hurtful. It is also intended to he used for producing local anoesthesis more rapidly than by 20 the means hitherto known and used. This “ aspirator ” is composed of a pump barrel, to which are fixed two short tubes or cannula joints (P, G, Pig. 1), each provided with a tap, and having an inner screw thread at their ends to permit the fixing on of a trocar or of an ordinary cannula. 25 In the above-mentioned cases of subcutaneous explorations the cannula joint P is fitted with a trocar cannula, as at Pig. 2, hut of any required length. It will he observed that the end of this cannula is pierced with several holes to prevent obstruction, and after its intro¬ duction into the part to he explored it will only he necessary to create a 30 vacuum in the barrel to bring into it the matter sought for. In case of continuous punction an ordinary cannula joint will be fitted to the cannula joint G, and when the barrel of the instrument is filled with the matter to be ejected the tap of the cannula joint P will be closed, that of the cannula joint G opened, and its contents forced out. 35 This operation may be repeated as often as may be required without displacement of the apparatus.