. Surgery, its principles and practice . oft-rubber catheter firm; a Thompson and a Gross Thompson dilator is 7 mm. thick at its beak and 11 mm. at the thickest 558 SURGERY OF THE PENIS AND URETHRA. portion of its shaft, and can be dilated to 22 mm. The Gross instru-ment is 14 mm. thick at the beak and 18 mm. at the upper portion of theshaft, and when the blades are fully separated, will dilate to 36 should also be on hand six ounces of a 5 per cent, emulsion of iodo-form in glycerin; a mercury bichlorid solution, 1 : 1000; a quantity ofwarm sterilized boric-acid solution;
. Surgery, its principles and practice . oft-rubber catheter firm; a Thompson and a Gross Thompson dilator is 7 mm. thick at its beak and 11 mm. at the thickest 558 SURGERY OF THE PENIS AND URETHRA. portion of its shaft, and can be dilated to 22 mm. The Gross instru-ment is 14 mm. thick at the beak and 18 mm. at the upper portion of theshaft, and when the blades are fully separated, will dilate to 36 should also be on hand six ounces of a 5 per cent, emulsion of iodo-form in glycerin; a mercury bichlorid solution, 1 : 1000; a quantity ofwarm sterilized boric-acid solution; sterilized gauze, sponges, and tapesto fasten the catheter in place after the operation. Operation.—Four days before the operation a meatotomy, if nec-essary, should be performed, after which a filiform bougieshould be inserted into the urethra as far as the neck ofthe bladder, and fastened so that it will not slip out; thepatient should then be put to bed. The instrument makescontinuous dilatation, the urine passing alongside of the. Fig. 291.—Modified Rapid Dila-tation BY Means of a Fili-form Bougie and a Thomp-sons Dilator. Red line represents filiformbougie passed into the urethrathrough the stricture, the end ofwhich is curled up in the bladder. whalebone. If, at the end of the third day, it is found that the quantityof urine secreted in twenty-four hours is normal and the amount of ureais not below 1 per cent., it is safe to proceed with the operation. Some hours before the operation a rectal enema of magnesium sul-phate, glycerin, soapsuds, and a pint of warm water is administered, andone hour before the patient comes to the operating table he is given ahypodermic of one-fourth grain of morphin and one-twentieth grain ofstrychnin. After administering the ether the anterior urethra is gently irrigatedwith a solution of mercury bichlorid 1 : 1000, and two drams of the iodo-form emulsion is injected into the urethra. The end of the filiform pro-truding from the urethra
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