System and method for rapid vascular drug delivery
First Claim
1. A device for delivery of a drug in liquid form, which comprises a main housing having a front end and a rear end, a forward directed aperture on the front end of said main housing, a syringe body having a front end and a rear end, said syringe body being slideable positioned in said main housing, a needle having a central bore communicating with at least one opening proximate to a tip of said needle, said needle being attached to the front end of said syringe body, communicating with an interior of said syringe body and being positioned to extend through the aperture of said main housing, an actuation handle extending in telescoping fashion over the rear end of said main housing, a drive plunger extending from the rear ends of said syringe body and said main housing into said actuation handle, a drive spring capable of exerting an extending force between said drive plunger and said actuation handle, a needle return spring connected between the front end of said said main housing for engaging said drive plunger in position at the rear end of said syringe body, and a means placed on the front end of said main housing for locking said drive plunger in position and for unlocking said drive plunger from the rear end said syringe body causing said needle to be releasibly extended from the front end of said main housing.
3 Assignments
0 Petitions
Accused Products
Abstract
A device (10) for rapid vascular drug delivery, particularly through the adult sternum or the pediatric tibia, incorporates a cylindrical syringe body (12), fitted with a needle (14). The syringe body is held in a cylindrical main housing (16) having a front barrel (18) with an orifice (20) through which the needle (14) may be extended. A cylindrical actuation handle (22) fits over end (24) of the main housing (16) for sliding movement along the main housing. A syringe plunger (26) contacts drive plunger (28) and extends into the syringe body (12) from end (30) to confine liquid medication (32) in the syringe body (12). A main spring (34) extends between the drive plunger (28) and the actuation handle (22) to bias the actuation handle (22) in its extended position. A needle return spring (38) extends between the front barrel (18) and the syringe body (12) to bias the needle to its retracted position. The drive plunger (28) has an annular peripheral socket (42) for one or more lock balls (44) which engage one or more openings (45) on the main housing (16) to lock the drive plunger in position with respect to the syringe body (12). A mating annular lock ball trip pocket (46) is positioned on inside surface (48) of the actuation handle to allow the device (10) to be fired when the lock ball(s) in socket (42) reach the pocket (46).
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Citations
15 Claims
- 1. A device for delivery of a drug in liquid form, which comprises a main housing having a front end and a rear end, a forward directed aperture on the front end of said main housing, a syringe body having a front end and a rear end, said syringe body being slideable positioned in said main housing, a needle having a central bore communicating with at least one opening proximate to a tip of said needle, said needle being attached to the front end of said syringe body, communicating with an interior of said syringe body and being positioned to extend through the aperture of said main housing, an actuation handle extending in telescoping fashion over the rear end of said main housing, a drive plunger extending from the rear ends of said syringe body and said main housing into said actuation handle, a drive spring capable of exerting an extending force between said drive plunger and said actuation handle, a needle return spring connected between the front end of said said main housing for engaging said drive plunger in position at the rear end of said syringe body, and a means placed on the front end of said main housing for locking said drive plunger in position and for unlocking said drive plunger from the rear end said syringe body causing said needle to be releasibly extended from the front end of said main housing.
- 8. A device for delivery of a drug in liquid form to red marrow, which comprises a main housing having a front end and a rear end, a forward directed aperture on the front end of said main housing, a syringe body having a front end and a rear end, said syringe body being slideable positioned in said main housing, a needle having a central bore communicating with at least one opening proximate to a tip of said needle, said needle being attached to the front end of said syringe body, communicating with an interior of said syringe body and being positioned to extend through the aperture of said main housing with a force exceeding 25 pounds such that the needle is capable of being releasibly extended with sufficient momentum to penetrate a patient'"'"'s skin and enter the red marrow inside a bone and to rapidly discharge the drug in liquid form from the syringe, through the needle and into the red marrow.
- 13. A device for delivery of a drug in liquid form, which comprises a main housing having a front end and a rear end, a forward directed aperture on the front end of said main housing, a syringe body having a front end and a rear end, said syringe body being slideable positioned in said main housing, a needle having a central bore communicating with at least one opening proximate to a tip of said needle, said needle being attached to the front end of said syringe body, communicating with an interior of said syringe body and being positioned to extend through the aperture of said main housing, a drive plunger extending from the rear end of said syringe body, a means on said main housing and engaging said drive plunger to lock and unlock said drive plunger in position at the rear end of said syringe body, a means connected to said drive plunger for applying propelling force to said drive plunger which exceeds 25 pounds to move said syringe body along said main housing in a first direction to releasibly extend said needle approximately 8 mm to 15 mm from the aperture when said device is pressed against a patient and to expel the drug from said syringe body into the patient, and a means connected to said syringe body to move said syringe body in a second direction opposite to the first direction for withdrawn said needle into said aperture when said device is no longer pressed against a patient.
Specification