The utility model provides a premixed filling syringe for tumor medicine, which comprises a needle tube, a pressing seat, a protective cap, a needle head cover, a needle mouth plug, an inner handle, an outer handle, an inner core rod, an outer rod, a piston, a diluent bin, a medicine powder bin, a positive tooth, a reverse tooth, a sealing film and a needle head, which is characterized in that: the inner side of the needle tube is distributed with reverse teeth; the outer side of the piston is distributed with positive teeth, after the positive teeth and the reverse teeth are engaged It can only move forward to the direction of the needle, not backward, avoid repeated suction, and force is needed to press the positive teeth and the reverse teeth to engage, so that the medical staff can easily control the speed of pushing medicine during operation; the needle tube is divided into several chambers, which are diluent chamber and medicine powder chamber; the medicine powder chamber is located at the end closest to the needle; the sealing membrane is waterproof membrane, which can be inside After the core rod is punctured, the diluent flows into the powder bin from the breach, and is fully mixed upside down.
【技术实现步骤摘要】
肿瘤药品预混填充式注射器
本技术涉及一种药物的预充式制剂,特别是涉及一种肿瘤药品预混填充式注射剂。
技术介绍
预充式制剂是以预充式注射器作为产品的内包装,而预充式注射器是一种更高级的药品包材,它把液体药物直接装入注射器中保存,使用时简单方便,同时注射器本身具有很好的密封性,药品可以长期储存。市面上的预充注射器为单室,并且只装一种液体药物的注射器,通常用于价值较高的药物,然而由于肿瘤药物的物理、化学特性不同,如很多肿瘤药物以干燥状态包装贮存,才能延长贮存期限。因此医院注射过程中,须先用注射器抽取这类药物所需的稀释溶液,注入装有干燥状态药物的容器中,混和摇匀成注射药液,再用同一注射器抽取该药液注入人体内。还有一些特殊肿瘤药物注射剂,须先将药物与另一种药液混均后,再用稀释溶液中和,因此在注射过程中,须先用注射器抽取一种药液,注入装有另一种药的容器中,混和摇匀,再注入稀释溶液混和成注射剂,再用同一注射器抽取该注射剂注入人体内。例如专利申请201220173374.X《一种新型预充式抗肿瘤药物一次性注射器》(公开日20121226)提供了一种单室的预充式抗肿瘤药物一次性注射器,其缺陷是只能够装一种液体药物;专利申请200920194760.5(公开日20100714)、200920194756.9(20100714)和201020155986.7(公开日20101208)等都公开了一次性使用预充式溶药注射器,但是也都存在着一定的缺陷:一方面操作复杂繁琐,配制注射液过程中容易产生污染;另一方面药物与稀释溶液分别用不同容器 ...
【技术保护点】
1.一种肿瘤药品预混填充式注射器,其特征在于所述肿瘤药品预混填充式注射器包括:针管、压座、护帽、针头套、针口塞、内手柄、外手柄、内芯杆、外杆、活塞、稀释液仓、药粉仓、正齿、倒齿、封膜、针头;所述针头套与护帽大小相符,针头套正好套住护帽密封;所述针口塞位于针头套内,与针头套是一体塑料,针口塞大小与针头一致;所述压座位于针管末端;所述针管内侧分布有倒齿;所述活塞外侧分布有正齿,正齿与倒齿互相咬合;所述针管被封膜分为几个小室,分别为稀释液仓、药粉仓;所述药粉仓位于最靠近针头的一端;所述封膜为防水膜,可被内芯杆戳破;所述外手柄与外杆相连;所述活塞与外杆相连;所述外手柄中间有圆孔,内芯杆从孔中插入外杆;所述外杆为空心杆,内部为内芯杆;所述内手柄与内芯杆相连;所述内芯杆为不锈钢制成,长度为外杆的2倍,末端为针尖状,用于戳破封膜;所述活塞由2种橡胶制成,内层为弹性橡胶,外层为硬质橡胶。/n
【技术特征摘要】
1.一种肿瘤药品预混填充式注射器,其特征在于所述肿瘤药品预混填充式注射器包括:针管、压座、护帽、针头套、针口塞、内手柄、外手柄、内芯杆、外杆、活塞、稀释液仓、药粉仓、正齿、倒齿、封膜、针头;所述针头套与护帽大小相符,针头套正好套住护帽密封;所述针口塞位于针头套内,与针头套是一体塑料,针口塞大小与针头一致;所述压座位于针管末端;所述针管内侧分布有倒齿;所述活塞外侧分布有正齿,正齿与倒齿互相咬合;所述针管被封膜分为几个小室,分别为稀释液仓、药粉仓;所述药粉仓位于最靠近针头的一端;所述封膜为防水膜,可被内芯杆戳破;所述外手柄与外杆相连;所述活塞与外杆相...
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