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以10% Xylocaine溶液局部浸潤麻醉鼓膜

Topical Anesthesia of Tympanic Membrane with 10% Xylocaine Solution

摘要


BACKGROUND: An effective anesthesia of the tympanic membrane is the hope of all otolaryngologists. The most commonly adopted anesthetic methods are Bonain's solution, iontophoresis, local anesthetic injection into the ear canal, and a number of others. Although these methods are effective to a certain degree, they still result in side effects. In foreign literature, attention has been given to the suitability of using 10%xylocaine solution on the tympanic membrane. However, Taiwanese reports contain no information pertaining to this kind of anesthesia. The purpose of this research is to determine the effects of applying 10% xylocaine on the tympanic membrane with myringotomy and the insertion of a ventilation tube. METHODS: 100 cases (88 patients) were randomly sampled at Taipei Municipal Yang-Ming Hospital from January 2001 to January 2004. Suitable cotton balls with 10%xylocaine or Sofradex solution were applied to the tympanic membranes of patients before myringotomy and insertion of the ventilation tube. The degree of pain for each patient was estimated during the operation. RESULTS: 47 out of 50 stimuli (94%) carried out after using 10%xylocaine resulted in a painless sensation during the operation, whereas further anesthetic methods were required for 48 out of 50 stimuli (96%) using Sofradex solution. The differences between these two methods are statistical significance (chi-square test; p<0.0001). No vertigo, tinnitus nausea or vomiting was noted during the operation. No complications were noted in either the ear canal or middle ear during outpatient visits two weeks after surgery. CONCLUSIONS: It can be concluded from our research that 10% xylocaine is suitable for use on the tympanic membrane. For simple outpatient surgery, such as myringotomy with a ventilation tube insertion, it offers otolaryngologists an altemative anesthetic method.

關鍵字

10% xylocain 局部麻醉 鼓膜

並列摘要


BACKGROUND: An effective anesthesia of the tympanic membrane is the hope of all otolaryngologists. The most commonly adopted anesthetic methods are Bonain's solution, iontophoresis, local anesthetic injection into the ear canal, and a number of others. Although these methods are effective to a certain degree, they still result in side effects. In foreign literature, attention has been given to the suitability of using 10%xylocaine solution on the tympanic membrane. However, Taiwanese reports contain no information pertaining to this kind of anesthesia. The purpose of this research is to determine the effects of applying 10% xylocaine on the tympanic membrane with myringotomy and the insertion of a ventilation tube. METHODS: 100 cases (88 patients) were randomly sampled at Taipei Municipal Yang-Ming Hospital from January 2001 to January 2004. Suitable cotton balls with 10%xylocaine or Sofradex solution were applied to the tympanic membranes of patients before myringotomy and insertion of the ventilation tube. The degree of pain for each patient was estimated during the operation. RESULTS: 47 out of 50 stimuli (94%) carried out after using 10%xylocaine resulted in a painless sensation during the operation, whereas further anesthetic methods were required for 48 out of 50 stimuli (96%) using Sofradex solution. The differences between these two methods are statistical significance (chi-square test; p<0.0001). No vertigo, tinnitus nausea or vomiting was noted during the operation. No complications were noted in either the ear canal or middle ear during outpatient visits two weeks after surgery. CONCLUSIONS: It can be concluded from our research that 10% xylocaine is suitable for use on the tympanic membrane. For simple outpatient surgery, such as myringotomy with a ventilation tube insertion, it offers otolaryngologists an altemative anesthetic method.

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