Two-stage fluid medicament jet injector

Details Two-stage fluid medicament jet injector Two-stage fluid medicament jet injector

1997-05-22

1999-06-15

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604135, A61M 530, A61M 520

Patent

active

059117036

ABSTRACT:
A jet injector, and a method, for injecting fluid medicament into a patient in a two-stage process. During the first stage fluid is expelled from the injector under relatively high pressure, to create a hole through the skin of the patient. During the second stage, fluid is infused through the hole into the patient at a much lower pressure, and for a much longer period of time. The jet injector includes a syringe unit, and a drive mechanism which is selectively connectable with the syringe unit. Specifically, the drive mechanism includes two springs which are positioned to urge against a push rod as they elongate. When the drive mechanism is engaged with the syringe unit, the push rod is positioned longitudinally co-linear with a plunger in the chamber. When the springs are released, they push the push rod which, in turn, pushes the plunger, causing the fluid to be expelled through an injection tube connected to the chamber. The syringe unit also includes a suction compartment for pulling the skin against a syringe tip at the end of the injection tube. To prepare the injector, the chamber of the syringe unit is filled with a fluid medicament, the drive mechanism is cocked, and the syringe unit is engaged with the drive mechanism. A vacuum source is then connected in fluid communication with the suction compartment. The syringe tip and the opening to the suction compartment are then pressed against the skin, and the injector is activated.

REFERENCES:
patent: 2101140 (1937-12-01), Hege
patent: 3605745 (1971-09-01), Hodosh
patent: 3640277 (1972-02-01), Adelberg
patent: 3690318 (1972-09-01), Gorsuch
patent: 4059107 (1977-11-01), Iriguchi et al.
patent: 4065230 (1977-12-01), Gezari
patent: 4150672 (1979-04-01), Whitney et al.
patent: 4403609 (1983-09-01), Cohen
patent: 4421508 (1983-12-01), Cohen
patent: 4437859 (1984-03-01), Whitehouse et al.
patent: 4518385 (1985-05-01), Lindmayer et al.
patent: 4623332 (1986-11-01), Lindmayer et al.
patent: 4680027 (1987-07-01), Parsons et al.
patent: 4722728 (1988-02-01), Dixon
patent: 4874367 (1989-10-01), Edwards
patent: 5024656 (1991-06-01), Gasaway et al.
patent: 5062830 (1991-11-01), Dunlap
patent: 5073165 (1991-12-01), Edwards
patent: 5074843 (1991-12-01), Dalto et al.
patent: 5116313 (1992-05-01), McGregor
patent: 5190523 (1993-03-01), Lindmayer
patent: 5312335 (1994-05-01), McKinnon et al.
patent: 5399163 (1995-03-01), Peterson et al.
patent: 5480381 (1996-01-01), Weston
patent: 5503627 (1996-04-01), McKinnon et al.
patent: 5503628 (1996-04-01), Fetters et al.
patent: 5505697 (1996-04-01), McKinnon, Jr. et al.
patent: 5520639 (1996-05-01), Peterson et al.
patent: 5599302 (1997-02-01), Lilley et al.
Du Gas, B. W., Medications--Meeting Basic Needs, Introduction to Patient Care, Jan. 1, 1983, Published by W.B. Saunders, pp. 621-626.
King, E. M., Illustrated Manual of Nursing Techniques, Jan. 1, 1986, Published by J.B. Lippincott, pp. 496-500.
McConnell, Edwina A., RN, MS, The Subtle Art of Really Good Injections, RN, Feb., 1982, pp. 25-34.
National Institute of Health, Giving a Subcutaneous Injection, Published by U.S. Department of Health and Human Services, Jan. 1, 1995.
Rayman, G., Walker R., Day, J.O., Diabetic Medicine, Patient Experience with a Jet Injector, Jan. 1, 1989, pp. 6: 274-276.
Schneider, U., Birnbacker, R, Schober, E., Painfullness of Needle and Jet Injection in Children with Diabetes Mellitus, European Journal of Pediatrics, Jan. 1, 1994, pp. 153: 409-410.
Wolff, L., Weitzel, M.H., Fuerst, E.V., The Administration of Therapeutic Agents, Fundamentals of Nursing, Jan. 1, 1983,. Published by J.B. Lippincott, pp. 685-701.

Affiliated with

Also associated with

Rating

Two-stage fluid medicament jet injector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-stage fluid medicament jet injector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage fluid medicament jet injector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-399436