Double lumen introducing needle

Claim 1

An introducing needle for use with a syringe barrel to draw blood and insert guidewires into a blood vessel, comprising: a. a needle having a hub end and a bevelled end for puncturing a blood vessel; b. said needle having first and second longitudinal lumens originating in a parallel relationship at the bevelled end of said needle; c. said first lumen being rectilinear along the entire longitudinal length of said needle and having its terminus at the hub end of said needle; d. said second lumen being rectilinear along the substantial longitudinal length of said needle; e. said second lumen having its terminus diverging at an acute angle θ from said first lumen at said hub end of said needle; f. a hub casing concentrically attached to said needle; g. said hub casing having a rectilinear primary body extending from the terminus of said first lumen of said needle; h. said hub casing primary body having an internal bore contiguously aligned with said first lumen of said needle; i. said internal bore of said hub casing primary body being adapted to engage a syringe barrel; j. said hub casing having a sidearm extending from the terminus of said second lumen of said needle and diverging at said acute angle θ from said hub casing primary body; and k. said hub casing sidearm having an internal bore contiguously aligned with said second lumen of said needle.

Claim 10

A method of introducing a guidewire into a blood vessel, comprising the steps of: a. first puncturing a blood vessel with a needle having a bevelled end, a hub end, and a pair of lumens originating in a parallel relationship at the bevelled end of the needle, the first lumen being engaged at the hub end of the needle to a syringe barrel and the second lumen diverging at an acute angle from the first lumen; b. next drawing blood through the first lumen of the needle with the syringe barrel to ensure that the bevelled end of the needle has completely punctured the blood vessel and is properly positioned within the blood vessel's interior cavity; c. next grasping the needle and syringe barrel in one hand so that the needle and syringe barrel are maintained in a fixed position with respect to the blood vessel; d. while grasping the needle and syringe barrel in one hand and maintaining them in a fixed position with respect to the blood vessel, simultaneously using the other hand to insert a guidewire through the second lumen of the needle and into the blood vessel; e. after the guidewire has been inserted through the second lumen of the needle and into the blood vessel, withdrawing the needle from the blood vessel over the guidewire so that the guidewire remains positioned within the blood vessel.

Claim 11

A method of introducing a guidewire into a blood vessel, comprising the steps of: a. first puncturing a blood vessel with a needle having a bevelled end, a hub end, and a pair of lumens originating in a parallel relationship at the bevelled end of the needle, the first lumen being engaged at the hub end of the needle to a syringe barrel and the second lumen diverging at an acute angle from the first lumen; b. next drawing blood through the first lumen of the needle with the syringe barrel to ensure that the bevelled end of the needle has completely punctured the blood vessel and is properly positioned within the blood vessel's interior cavity; c. next grasping the needle and syringe barrel in one hand so that the needle and syringe barrel are maintained in a fixed position with respect to the blood vessel; d. while grasping the needle and syringe barrel in one hand and maintaining them in a fixed position with respect to the blood vessel, simultaneously using the other hand to insert a guidewire through the second lumen of the needle and into the blood vessel; e. after the guidewire has been inserted through the second lumen of the needle and into the blood vessel, withdrawing the needle from the blood vessel over the guidewire so that the guidewire remains positioned within the blood vessel.

Claim 13

A method of introducing two guidewires into a blood vessel through a single puncture location, comprising the steps of: a. first puncturing a blood vessel at a single location with a needle having a bevelled end, a hub end, and a pair of lumens originating in a parallel relationship at the bevelled end of the needle, the first lumen being removably engaged at the hub end of the needle to a syringe barrel and the second lumen diverging at an acute angle from the first lumen; b. next drawing blood through the first lumen of the needle with the syringe barrel to ensure that the bevelled end of the needle has completely punctured the blood vessel and is properly positioned within the blood vessel's interior cavity; c. next grasping the needle and syringe barrel in one hand so that the needle and syringe barrel are maintained in a fixed position with respect to the blood vessel; d. while grasping the needle and syringe barrel in one hand and maintaining them in a fixed position with respect to the blood vessel, simultaneously using the other hand to insert a first guidewire through the second lumen of the needle and into the blood vessel; e. after the first guidewire is inserted into the blood vessel, disengaging and removing the syringe barrel from the first lumen at the hub end of the needle; f. next inserting a second guidewire into the hub end of the needle, through the first lumen, and into the blood vessel; and g. after the first guidewire has been inserted through the second lumen of the needle and into the blood vessel and the second guidewire has been inserted into the hub end of the needle and through the first lumen of the needle and into the blood vessel, withdrawing the needle from the blood vessel over the first and second guidewires so that the guidewires remain positioned within the blood vessel.

Claim 14

A method of introducing two guidewires into a blood vessel through a single puncture location, comprising the steps of: a. first puncturing a blood vessel at a single location with a needle having a bevelled end, a hub end, and a pair of lumens originating in a parallel relationship at the bevelled end of the needle, the first lumen being removably engaged at the hub end of the needle to a syringe barrel and the second lumen diverging at an acute angle from the first lumen; b. next drawing blood through the first lumen of the needle with the syringe barrel to ensure that the bevelled end of the needle has completely punctured the blood vessel and is properly positioned within the blood vessel's interior cavity; c. next grasping the needle and syringe barrel in one hand so that the needle and syringe barrel are maintained in a fixed position with respect to the blood vessel; d. while grasping the needle and syringe barrel in one hand and maintaining them in a fixed position with respect to the blood vessel, simultaneously using the other hand to insert a first guidewire through the second lumen of the needle and into the blood vessel; e. after the first guidewire is inserted into the blood vessel, disengaging and removing the syringe barrel from the first lumen at the hub end of the needle; f. next inserting a second guidewire into the hub end of the needle, through the first lumen, and into the blood vessel; and g. after the first guidewire has been inserted through the second lumen of the needle and into the blood vessel and the second guidewire has been inserted into the hub end of the needle and through the first lumen of the needle and into the blood vessel, withdrawing the needle from the blood vessel over the first and second guidewires so that the guidewires remain positioned within the blood vessel.