Unverified88% confidenceDecision RuleTime unknown
项圈佩戴松紧应保证颈部可插入2指（约1-1.5cm间隙），过紧会造成皮肤摩擦性接触性皮炎，过松则药物无法充分接触皮肤释放而失效
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88%
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Long-term
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Unverified佩戴时项圈与颈部应保留2指宽间隙（约1-2cm），过紧导致皮肤药物浓度过高引起接触性皮炎，过松则药物无法均匀释放到皮脂层失效93% similarUnverified缠绕后应能插入一到两根手指的松紧度为宜，若出现远端皮肤发白、发紫、麻木、刺痛或肿胀，说明缠得过紧需立即松开重缠，避免神经血管压迫损伤85% similarUnverified项圈应保留可插入2根手指的松紧度，过紧会磨伤皮肤，过松则接触面积不足影响药效释放；佩戴后需剪掉多余长度防止宠物啃咬81% similarUnverified四肢开口应做卷边或包边处理且开口直径留出1-2指余量，无包边的裁切开口在拉伸后会卷曲摩擦腋下皮肤，长期穿易磨出红痕和脱毛80% similarUnverified颈围应可在2档以上调节，实测颈部与围嘴之间能塞入1-2根手指为松紧适宜，过紧勒脖过松口水下渗79% similar
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