The feasibility of using a subcutaneously implanted portal system attached to a conventional 16-gauge epidural catheter has been evaluated in 50 patients with sever pain associated with cancer. This technique allowed for the percutaneous epidural administration of morphine at 8-12-hourly intervals for pain control. The mean duration of implantation was 12 weeks and the longest period a portal remained in situ was 36 weeks. Five portals had to be removed for various reasons. The injection system has blocked on eight occasions due to catheter blockage (six times) and portal blockage (two occasions). These patients have continued to obtain excellent analgesia when either catheter or portal were replaced. In a cadaver, 300 injections were simulated using either 22-gauge Huber point needles or disposable needles (25 gauge) and the injectate examined by both light and scanning electron microscopy. Both needle types resulted in particulate contamination which was greater with the recommended Huber point needles.

译文

:已对50例与癌症相关的严重疼痛的患者评估了使用皮下植入的门禁系统连接传统的16号硬膜外导管的可行性。该技术允许以8-12小时的间隔经皮硬膜外给予吗啡以控制疼痛。平均植入时间为12周,而门户留在原位的最长时间为36周。由于各种原因,必须删除五个门户。由于导管阻塞(六次)和门静脉阻塞(两次),注射系统已发生八次阻塞。当更换导管或门静脉时,这些患者继续获得出色的镇痛效果。在尸体中,使用22号Huber点针或一次性针头(25号针头)模拟了300次注射,并通过光学和扫描电子显微镜对注射进行了检查。两种类型的针都导致微粒污染,建议的Huber点式针污染更大。

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