초록 ▼

Invention relates to catheter placement devices for peripheral blood vessel catheterization with protected needle tip and shortened length in a transport position (see FIG. 31). In the transport position (FIG. 9), the needle and catheter units (1 and 5) are held inside the handle (8). User transpose

Invention relates to catheter placement devices for peripheral blood vessel catheterization with protected needle tip and shortened length in a transport position (see FIG. 31). In the transport position (FIG. 9), the needle and catheter units (1 and 5) are held inside the handle (8). User transposes the needle and catheter units into a duty ready position (FIG. 6), wherein the needle unit is engaged with the handle distal end and a catheter hub (7) protrudes distally out of the handle. After catheter insertion into patient vein, user disconnects the needle unit and handle allowing the needle unit retraction by a resilient member (11) into the protection position. The trigger and transposing means (22) location enables the apparatus single handed control. The fixation means (31) in the protection position eliminates repeated needle unit advance. It can be used rubber or spiral spring resilient members and the catheter hubs with foldable side wings and side port.

대표청구항 ▼

The invention claimed is: 1. A compact catheter insertion apparatus, said apparatus comprising: a needle unit having a needle with a needle distal sharp point and a needle proximal end, a needle hub attached to said needle proximal end, and a flash chamber located inside said needle hub and having

The invention claimed is: 1. A compact catheter insertion apparatus, said apparatus comprising: a needle unit having a needle with a needle distal sharp point and a needle proximal end, a needle hub attached to said needle proximal end, and a flash chamber located inside said needle hub and having a porous membrane permeable to air and non-permeable to blood; a catheter unit having a catheter tube and a catheter hub affixed to a catheter tube proximal end; a handle serving as a guide and a receptacle for said needle and catheter units; a security zone located at said handle distal end, wherein said needle distal sharp point is protected from contact with persons when the needle distal sharp point is in said security zone; said needle unit, catheter unit, and handle are operable to be disposed in a transport position, a duty ready position, and a protection position, wherein: in said transport position said needle and said catheter unit are disposed within the axial limits of said handle, said needle is disposed inside said catheter tube so that said needle distal sharp point protrudes distally of the distal end of said catheter tube, said catheter unit is disposed in an extreme proximal position with respect to said handle, said needle hub is disposed near said handle proximal end, and said needle distal sharp point is disposed in said security zone; in said duty ready position said needle unit is releasably affixed to said handle adjacent to said handle distal end, said catheter hub at least partly protrudes out of said handle in a distal direction thereby providing the user's immediate access and the immediate control of said catheter hub by user's hand; in said protection position said needle distal sharp point is positioned in said security zone; a transposing member attached to said needle unit, extending outside of said handle, to be effected by user's finger for manual transposition of said catheter unit and needle unit from said transport position into said duty ready position; a duty fixation means for releasable affixing said needle unit adjacent to said handle distal end in said duty ready position; a resilient retracting means for the retraction of said needle unit from said duty ready position into said protection position including a resilient member installed beyond a blood flow and having maximum stressed state in said duty ready position; a trigger member for actuating said retracting means, wherein in said duty ready position said trigger member is disposed at the distal part of said handle, wherein a single hand of an associated user may control said trigger member and also holds the apparatus. 2. The apparatus of claim 1, wherein said handle has a longitudinal internal cavity, in which said catheter unit is located in said transport position, said needle unit is located in said transport and protection positions, said needle hub at least partly is located in said duty ready position, and there is a longitudinal slot in said internal cavity wall, through which said transposing member extends. 3. The apparatus of claim 2, wherein the resilient member is made of elastic polymer like rubber and secured to said needle hub and handle by a coupling means. 4. The apparatus of claim 3, wherein said resilient member has a ring form and said coupling means are made as protrusions, one of which is located on said needle hub and the other is located at said handle proximal end. 5. The apparatus of claim 2, wherein said resilient member is an extension spiral spring. 6. The apparatus of claim 2, wherein said resilient member is a compression spiral spring disposed lengthwise in said handle. 7. The apparatus of claim 6, wherein said catheter hub in said transport position is disposed beyond said spring. 8. The apparatus of claim 6, wherein said catheter hub in said transport position is disposed inside said spring, and said spring allows free transposition of said catheter hub from said transport position to said duty ready position. 9. The apparatus of claim 2, wherein said catheter hub is provided with two flexible side wings for securing said catheter hub to patient's skin, said side wings are foldable and said handle longitudinal internal cavity has form and dimensions adapted to movable receiving said catheter hub with folded said side wings. 10. The apparatus of claim 2, wherein said handle longitudinal slot is open from the distal face of said handle. 11. The apparatus of claim 10, wherein said catheter hub has a side port protruding outside said handle through said handle longitudinal slot in said transport position. 12. The apparatus of claim 11, wherein an intermediate bush is located proximally of said catheter tube in said transport and duty ready positions and the intermediate bush is movably operable with said catheter and needle unit during transposition from said transport position into said duty ready position, and said intermediate bush remains at said handle distal end in said protection position for forming a portion of said security zone and restricting accidental personnel contact with said needle distal sharp point. 13. The apparatus of claim 2, wherein said duty fixation means includes a latch member and an engagement member, wherein the latch member and the engagement member cooperatively interact such that when one of the latch member and the engagement member is disposed on said needle unit in said duty ready position, the other is disposed on an element that is immovable relative to said handle at least in said duty ready and protection positions. 14. The apparatus of claim 2, further including a protection fixation means for the fixation of said needle unit in said protection position. 15. The apparatus of claim 14, wherein said resilient member presents said protection fixation means preventing said needle unit from spontaneous displacement in a distal direction relative to said handle. 16. The apparatus of claim 15, wherein said protection fixation means is formed by a springy locking member and a notch, wherein one of the springy locking member and the notch is disposed on said needle unit and the other is located on said handle so that the engagement of the springy locking member and the notch in said protection position prevents said needle unit from the displacement in a distal direction relative to said handle. 17. The apparatus of claim 2 further including a transport fixation means for the fixation of said needle unit relative to said handle in said transport position. 18. The apparatus of claim 17, wherein said resilient member in said transport position presents said transport fixation means preventing said needle unit from spontaneous displacement in said distal direction relative to said handle. 19. The apparatus of claim 2 further including a safety lock means additionally locking said needle unit in said protection position and thereby eliminating a spontaneous displacement of said needle unit distally from said protection position. 20. The apparatus of claim 16, wherein said safety lock means presents a lid secured to said handle distal end by an elastic link and in said protection position said lid is manually closed creating a distal barrier hampering the displacement of said distal sharp point outside of said security zone in a distal direction. 21. The apparatus of claim 2, wherein said transposing member is detached from said needle hub after transposing said needle unit into said duty ready position, but not before activation of said trigger member, where said detachment results in elimination of repeated transposition of said needle unit (1) from said protection position into the duty ready position. 22. The apparatus of claim 13, wherein said latch member and trigger member are made as a single detail so that the activation of said trigger member disengages said latch member and said engagement member. 23. The apparatus of claim 2, wherein said trigger member is disposed on said needle unit and said needle hub and trigger member are made as a single detail. 24. The apparatus of claim 2, wherein said trigger member is disposed on an immovable element relative to said handle while apparatus is in at least said duty ready and protection positions. 25. The apparatus of claim 24, wherein said trigger member and said handle are made as a single detail. 26. The apparatus of claim 2, wherein a proximal force applied to the trigger member in the duty ready position activates the trigger member. 27. A compact catheter insertion apparatus, comprising: a needle unit having a needle with a needle distal sharp point and a needle proximal end to which a needle hub is attached; a handle having a longitudinal internal cavity; a catheter unit having a catheter tube and a catheter hub affixed to a catheter tube proximal end, said catheter hub is provided with two foldable side wings for securing said catheter hub to patient's skin, and said catheter hub with said folded side wings has a transverse dimension less than the longitudinal internal cavity of the handle; a security zone located at said handle distal end, wherein said needle distal sharp point is protected from contact with persons when the needle distal sharp point is in said security zone; said needle unit, catheter unit, and handle are operable to be disposed in a transport position, a duty ready position, and a protection position, wherein: in said transport position said needle and said catheter unit are disposed within the axial limits of said handle, said needle is disposed inside said catheter tube so that said needle distal sharp point protrudes distally of the distal end of said catheter tube, said catheter unit is disposed in an extreme proximal position with respect to said handle, said needle hub is disposed near said handle proximal end, and said needle distal sharp point is disposed in said security zone; in said duty ready position said needle unit is releasably affixed to said handle adjacent to said handle distal end, said catheter hub at least partly protrudes out of said handle in a distal direction thereby providing the user's immediate access and the immediate control of said catheter hub by user's hand; in said protection position said needle distal sharp point is positioned in said security zone; a transposing member attached to said needle unit, extending outside of said handle, to be effected by user's finger for manual transposition of said catheter unit and needle unit from said transport position into said duty ready position; a duty fixation means for releasable affixing said needle unit adjacent to said handle distal end in said duty ready position; a resilient retracting means for the retraction of said needle unit from said duty ready position into said protection position including a resilient member installed beyond a blood flow and having maximum stressed state in said duty ready position; a trigger member for actuating said retracting means, wherein in said duty ready position said trigger member is disposed at the distal part of said handle, wherein a single hand of an associated user may control said trigger member and also holds the apparatus. 28. The apparatus of claim 27, wherein said resilient member is disposed eccentrically relative to the axis of said needle. 29. The apparatus of claim 28, wherein said handle longitudinal internal cavity has a longitudinal slot and there is a transposing member designed for manual transposition of said catheter unit and needle unit from said transport position into said duty ready position, located on the lateral surface of said needle unit, extending through said handle longitudinal slot to the outside, and adapted to the effect by user's finger. 30. The apparatus of claim 29, wherein said handle internal cavity and said longitudinal slot have the form and dimensions adapted to movable location and transposition of said catheter hub with said folded side wings. 31. The apparatus of claim 30, wherein said catheter hub along with a central port includes a side port, wherein said handle internal cavity and longitudinal slot are adapted to be movably located and transposed in said side port.