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运用2450和915MHz微波鼻咽腔内辐射器对肌肉体模和患者作鼻咽腔内加温,以及用8MHz射频对鼻咽部作体外电容式透热加温,通过液晶膜感温试验和抗电磁波干扰的多点测温结果分析认为①采用腔内加热法不管使用何种频率对鼻咽癌仍局限于腔内的原发灶热疗,具有一定的意义,其有效加温深度大约在粘膜下0.5至1cm左右。用915MHz比用2450MHz要稍深一些。对稍远离鼻咽腔的周围软组织浸润病灶加温则因热衰减快透深不够而升温不理想;②体外电容式透热加温则因骨骼的屏蔽使鼻咽腔内升温不理想,未能达到有效治疗温度,但不排除对周围软组织侵犯病例的治疗意义;③对几十例鼻咽癌腔内热疗患者观察(另文)和临床测温研究提示人鼻咽腔内的热耐受能力较强,一般可达50℃左右,患者感觉为温热感和轻微疼痛,耳内热痛感,少量病例有头晕或恶心症状均在停止加温后消失。到目前为止,并未发现热灼伤和不可逆的组织损害。
Using 2450 and 915MHz microwave nasopharyngeal internal radiators on the nasopharyngeal muscle and pharyngeal muscle heating, and 8MHz RF nasopharyngeal condenser for external capacitive heating, through the liquid crystal membrane temperature test and resistance Electromagnetic interference of multi-point temperature measurement results that the use of intracavitary heating regardless of the frequency of nasopharyngeal carcinoma is still confined to the cavity of the primary tumor hyperthermia, has some significance, the effective heating depth about the mucosa About 0.5 to 1cm or so. With 915MHz than with 2450MHz to be slightly deeper. On the far away from the nasopharyngeal soft tissue around the infiltration of the lesion heating due to heat attenuation is not enough to penetrate the deep enough and warming is not ideal; ② in vitro capacitive diathermy due to bone shield shielding nasopharyngeal temperature is not ideal, failed to To achieve effective treatment of temperature, but does not rule out the treatment of cases of violations of the surrounding soft tissue; (3) dozens of cases of nasopharyngeal carcinoma in patients with endometrial thermotherapy (another text) and clinical temperature measurement suggest that human nasopharyngeal heat tolerance Ability is strong, generally up to about 50 ℃, the patient feels warm and mild pain, ear pain, a small number of cases have dizziness or nausea symptoms disappear after stopping warming. So far, no thermal burns and irreversible tissue damage have been found.