Catheter placement device

A catheter placement device comprising a catheter locking assembly including a luer adapter having a bore therethrough, a male luer lock connector at the distal end adapted for connection with a female luer lock connector of an introducer catheter, an extension member connected with and extending proximally from said male luer lock connector, and threads on said extension member adjacent the distal end therof, said bore having a generally frusto-conical bore portion with its larger end proximal of its narrower end, a catheter locking adapter having a bore therethrough in registration with said leur adapter bore and including a flexible collet extending distally therefrom, a collar connected in spaced surrounding relation with said collet and having threads on the inner walls thereof for threaded connection with said luer adapter threads, and an elastomeric grommet in said collet including a generally cylindrical body having a bore, and an enlarged annular head at the distal end thereof extending distally of the distal end of said collet and engaged with said bore portion, said head including an annular radially inwardly extending flange at the distal end thereof having an opening in registration with said adapter and grommet bores, a pliable catheter extending through said grommet and said adapter bores and said flange opening and having a greater outer diameter than the diameter of said flange opening, said flange engaging said catheter and being movable generally distally of said grommet bore in response to distal movement of said catheter to effect a relatively slight resistance to distal movement of said catheter through said grommet bore, said flange being movable into said grommet bore in compressed relation between the walls of said grommet bore and said catheter to effect a substantially greater resistance to proximal movement of said catheter through said grommet bore than to distal movement thereof, said collet and grommet head being movable in said bore portion toward the narrower end thereof to compress said collet about said grommet and resiliently compress said grommot against said catheter and said bore portion to lock said catheter against axial movement relative to said adapters in response to relative rotation of said adapters in one rotational sense, said grommet effecting seal between said bore portion and around said catheter when said catheter is locked, said adapters being relatively rotatable in the opposite sense of rotation to unlock said catheter to permit axial movement thereof relative to said adapters, a collapsible sleeve covering a main portion of said catheter and permitting said catheter to be manually fed through said adapters without manually touching said catheter, and means for connecting said sleeve to said locking adapter, said means for connecting said sleeve to said locking adapter including a sleeve member slidable over said adapters, said sleeve member having splines on the inner surface thereof, said adapters having splines on the outer surfaces thereof cooperable with said sleeve member splines whereby rotation of said sleeve member effects rotation of each of said adapters when in said sleeve member, said sleeve member being removable from said adapters.

A catheter placement device comprising a pair of threadedly coupled relatively rotatable members each having a bore therethrough, and resiliently compressible grommet means having a bore therethrough disposed in the bore of one of said members for engagement with the other of said members, on elongate catheter axially movable selectively in proximal and distal direction through all of said bores, said members being axially movable toward each other and shaped to urge a portion of said grommet means into increased frictional engagement with said catheter to lock said catheter against axial movement relative to said members in response to predetermined relative rotation of said members, a flexible protective sleeve surrounding said catheter and being longitudinally collapsible to permit distal movement of said catheter through said grommet means bore and bores of said members when a portion of said sleeve is manually pinched about said catheter and said sleeve portion and said catheter are moved distally relative to said members, and a sleeve connector connected to said sleeve at the distal end thereof, said connector being slidable over at least one of said members and having abutment means on the radially inner side thereof, at least said last named member having abutment means on the radially outer side thereof cooperable with said abutment means on said connector so that rotation of said connector when extending over said last named member effect rotation thereof.

A catheter placement device comprising a pair of threadedly coupled relatively rotatable members each having a bore therethrough, a resiliently compressible grommet having a bore therethrough and including on elongate tubular portion extending into the bore of one of said members for engagement with the bore of the other of said members, a flexible catheter extending through all of said bores, said grommet bore being of greater diameter than the outer diameter of said catheter to allow said catheter to move therethrough with relatively low resistance, said members being axially movable to urge said grommet against said bore of said other member and into tight frictional engagement with said catheter to lock said catheter against movement relative to said members in response to predetermined relative rotation of said members, a flexible protective sleeve surrounding said catheter and being longitudinally collapsible to permit distal movement of said catheter through said grommet bore and bores of said members when a portion of said sleeve is manually pinched about said catheter and said sleeve portion and said catheter are moved distally relative to said members, and a sleeve connector connected to said sleeve at the distal end thereof, said connector being slidable over said members and having abutment means on the radially inner side thereof, said members have abutment means on the radailly outer sides thereof complementary with said abutment means on said connector so that rotation of said connector when extending over both of said members effects rotation of both said members.

A catheter placement device comprising a male luer lock adapter for connection with a female luer lock connector including a male slip connector having a bore, and a luer tapered outer surface, a collar connected to and surrounding said slip connector, thread means on the inner side of said collar, and an elongate elastomeric grommet having a bore therethrough, a tubular portion extending in the bore of said slip connector in frictional engagement therewith, and a head portion integral with said tubular portion and extending distally beyond the distal end of said slip connector, said head having a greater outer diameter and a greater wall thickness than that of said tubular portion, a pliable catheter movable in said bores, said head including an annular radially inwardly extending flange having an opening with a diameter smaller than the outer diameter of said catheter for frictional engagement with said catheter, said walls of said flange being of a thickness to move into said tubular portion with increased frictional forces applied by said flange to said catheter in response to proximal movement of said catheter relative to said flange, abutments on the radially outer side of said collar, a sleeve connector having abutments on the inner side thereof complementary to said abutments on the radially outer side of said collar for effecting rotation of said luer lock adapter upon rotation of said sleeve connector, and flexible sleeve adapted to surround at least a portion of said catheter connected to said sleeve connector.