A passive intravenous (“IV”) catheter introducer having a spring-biased needle retraction system that is triggered when the needle is manually withdrawn through a catheter hub seal. The catheter hub seal constricts to block the rearward flow of bodily fluid and wipe potentially infectious fluids off the outer surface of the needle as the needle is manually withdrawn through the catheter sheath and seal following insertion of the catheter into a patient’s vein. No additional steps are needed to activate the needle retraction mechanism beyond manual removal of the needle from the catheter hub seal.一種被動式靜脈內(“IV”)導管引入器,具有一彈簧推壓針頭回縮系統,其可在針頭被手動抽回通過一導管轂密封件時被啟動。該針頭在該導管插入至病人血管內後經由該導管鞘套及密封件抽回時,該導管轂密封件會束緊而阻擋向後流動的體液,並將可能會有傳染性的流體自該針頭的外表面上擦拭掉。在以手動方式將該針頭自該導管轂密封件移出以外,並不需要以另外的步驟來啟動該針頭回縮機構。10‧‧‧靜脈內導管引入器12‧‧‧導管轂14‧‧‧筒部18‧‧‧導管轂密封件20‧‧‧側翼22‧‧‧導管鞘套24‧‧‧斜角針頭尖端26‧‧‧鈍針頭末端27‧‧‧針頭固持件28‧‧‧回縮彈簧31‧‧‧針頭固持件前端32‧‧‧側向出入口38‧‧‧導管轂凸緣40‧‧‧環狀肩部42‧‧‧環狀肩部
