Manual catheter placement device

摘要

An improved manual catheter placement device to facilitate successful cannulation by minimizing risks of needle tip disengagement with a penetrated blood vessel and by minimizing risks of blood vessels overpenetration. The device comprises a needle, a catheter concentric with the needle, means of manually creating vacuum to accelerate backflow of blood upon occurred penetration, means for manually advancing the catheter, said means for manually advancing the catheter being actuated by said means for creating the vacuum. Actuation of said means for catheter advancement may be either achieved by release of said means for catheter advancement, said advancing means being positioned within easy reach of the operator's hand which creates the vacuum, so that no repositioning of the vacuum creating hand nor a two hands operation is required, or may be accomplished by conversion of the manual action exerted upon said vacuum creating means into a catheter advancing action exerted upon said means for advancing the catheter. The above features are aimed at minimizing loss of needle tip engagement with blood vessel, while overpenetration is minimized by a specially configured needle catheter assembly favoring near parallel approach of the needle in respect to the blood vessel to penetrate.