. The Pathology and treatment of venereal diseases [electronic resource]: including the results of recent investigations upon the subject . illremains a strong tendency to contraction, which must be overcomeby frequent catheterism repeated at first every day or two, and sub-sequently at increasing intervals, as after gradual dilatation; by thismeans only can it be hoped to maintain the ground already gained,and to effect the removal of the contractile material which inducesrelapse. Rapid Dilatation.—Continuous dilatation above described, is alsoin a measure rapid, but it accomplishes its objec
. The Pathology and treatment of venereal diseases [electronic resource]: including the results of recent investigations upon the subject . illremains a strong tendency to contraction, which must be overcomeby frequent catheterism repeated at first every day or two, and sub-sequently at increasing intervals, as after gradual dilatation; by thismeans only can it be hoped to maintain the ground already gained,and to effect the removal of the contractile material which inducesrelapse. Rapid Dilatation.—Continuous dilatation above described, is alsoin a measure rapid, but it accomplishes its object indirectly, whilethe methods we are now briefly to consider aim directly at the speedyenlargement of the passage. Eapid dilatation may be effected by means of conical sounds orbougies, the small extremity of which is introduced within thestricture and advanced by gentle but steadily continued pressureuntil the shaft, which is several sizes larger than the point, is fairlvinserted; the instrument may then be allowed to remain for severalhours, and a larger one substituted for it. 1 Thompson, op. cit., p. 193. RAPID DILATATION. 297. Several instruments invented for rapid di- Fis-19* latation are constructed upon the commonprinciple of a series of tubes varying in di-ameter, which slide one upon another. Inthe instrument of Mr. Thomas Wakley, aNo. 1 silver catheter is employed as a guide,which is first introduced into the bladder,and the tubes passed in succession over the desired degree of dilatation hasbeen accomplished at any one session, aflexible catheter may be inserted in placeof the largest silver tube which has beenused, and, the conductor having been with-drawn, be retained until the next the strong testimony adduced by in favor of his method, it wouldappear to be well worthy a trial in somecases. In the instrument invented by Dr. Buchanan, of Glasgow, thesliding tubes and a central conducting wire are united into a com-pound catheter (Fi
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