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INSTILLATION (Latin. instillatio injection on drops) — drop introduction to an urethra or to a bladder of medicinal solution. In most cases instillation is made at diseases of a seminal hillock and the tail of an urethra. The tools used for And., are called installers. The way was for the first time offered by F. Gyuyon in 1867.

Fig. The diagrammatic representation of the syringe of Gyuyon for instillation: 1 — the syringe; 2 — an elastic catheter with an olive on the end; 3 — cannulas.

And. in an urethra it is shown at hron, its inflammations, hl. obr. gonorrheal character. It should be made slowly, a drop behind a drop, solution (from 10 to 20 drops) is entered into a certain place of an urethra. Thus it is possible to affect selectively the struck places. For And. Gyuyon's syringe and the thin elastic catheter (installer) supplied with an olive are necessary (fig.). Gyuyon's syringe (capacity of 4 ml) has the following feature: its piston moves thanks to rotation of the handle, and at its each half-turn from the syringe one drop of solution is squeezed out. The cannula is put on the syringe, edges it is densely inserted into an installer. Gyuyon's installer is supplied with an olive of various caliber; usually use olives from No. 12 to 16 on Sharryer's scale. And. it is possible to make also by means of any syringe with a capacity of 5 — 10 ml. The patient previously force to urinate; the outside opening of the channel, tools and hands of the surgeon prepare the same as for usual catheterization of uric ways. And. it is the best of all to make in position of the patient lying. At And. to the forefront of an urethra the catheter is brought to an outside sphincter and enter solution a drop behind a drop, slowly bringing the tool out of an urethra. The patient then clamps an outside opening of an urethra, holding thus solution in the channel within 2 — 3 min. The first urination is allowed usually not earlier than in 0,5 — 1 hour. Women have an equipment I. more simply: the catheter is entered directly into a neck of a bladder.

For And. apply solutions of silver salts, preferential silver nitrate, in concentration from 0,25 to 2%. It is possible to apply proteinaceous compounds of silver and other chemotherapeutic drugs of bactericidal action. At the choice of drug it is necessary to consider the nature of an infection; so, at tubercular cystitis administration of silver nitrate is not shown, the best results are yielded by introduction methylene blue (1%), Rivanolum (1: 5000), corrosive sublimate (1: 20 000). And. begin with weak solutions, gradually increasing concentration to cause the corresponding reaction of fabrics, i.e. allocations from the channel accruing in several hours after I. S development of treatment of gonorrhea by antibiotics, sulfanamide and antibacterial drugs of the indication to And. were considerably narrowed.

Bibliography: Veynerov I. B. and Rozhinsky L. M. Diseases of urinogenital bodies at men (a lower part of urinogenital system), page 183, Kiev, 1961; The Guide to clinical urology, under the editorship of A. Ya. Pytel I, M., 1970, bibliogr.

I. F. Shishov.