A practical treatise on the diseases of the ear including the anatomy of the organ . Introduction, of Eustachian Catheter. by the contraction of tlie soft palate, which performs a swal-lowing movement, raises itself, and lifts the beak of the instru-ment into the tube. Once in position the catheter should notcause the patient any inconvenience in speaking or swallowing. The difficulties that are found in introducing the catheter,simple manipulation as it is, arise from two causes : First, the surgeon does not always hold the instrument ina vertical position (see Fig. 21) until he has got the b
A practical treatise on the diseases of the ear including the anatomy of the organ . Introduction, of Eustachian Catheter. by the contraction of tlie soft palate, which performs a swal-lowing movement, raises itself, and lifts the beak of the instru-ment into the tube. Once in position the catheter should notcause the patient any inconvenience in speaking or swallowing. The difficulties that are found in introducing the catheter,simple manipulation as it is, arise from two causes : First, the surgeon does not always hold the instrument ina vertical position (see Fig. 21) until he has got the beak wellinto the meatus. A failure to do this will often cause the instru-ment to pass between the inferior and middle turbinated bones,instead of along the floor of the meatus, which must be huggedin order that the instrument may get to the mouth of the tube. 96 INTRODUCTION OF EUSTACHIAN CATHETER. Second, the patient is apt to shut his eyes spasmodicallyand contract his facial muscles, and thus prevent the relaxa-. The Eustachian Catheter in Position. tion of the parts that is necessary during the manipulation. This difficulty is only to be overcome by persuading the pa-fig. 23. tient to open his eyes and look about the room, which can be done if the surgeon have a quiet,assuring manner. This difficulty usually passesaway with the second or third use of the instru-ment, and sometimes it does not arise. Having introduced the catheter we mayforce air through it into the cavity of the tym-panum, by means of an air-bag whose nozzleshould fit accurately into the funnel-shaped ex-tremity of the nasal instrument. Air may alsobe blown in from the lungs of the examinerthrough a slender bit of rubber tubing, the tips DIAGNOSTIC TUBE. 97 of which are placed in the opening of the catheter and themouth of the examiner respectively. The use of the rubberbag or syringe is to be preferred to this method as being amore cleanly and delicate one. After air has been forced into the middle ear in
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Keywords: ., bookcentury1800, bookdeca, booksubjectear, booksubjecteardiseases
