Angiographic injector and angiographic syringe for use therewith
First Claim
1. An angiographic injector for injecting a contrast media from an angiographic syringe which includes a movable plunger for forcing contrast media from said syringe into the vascular system of an animal, said injector comprising:
- mounting means for supporting at least one syringe for an injection operation;
actuating means adjacent said mounting means for controlling the movement of said plunger in said syringe;
drive means disposed at one end of said actuating means for causing retraction of said plunger in said syringe and advancement of said plunger in said syringe to force the contrast media from said syringe in the injection operation; and
quick release means forming respective mating parts of said plunger and said drive means for selectively placing said plunger in a driven state by said drive means such that said drive means can retract said plunger in said syringe, and in an undriven state by said drive means such that said drive means can be retracted relative to said plunger without retraction of said plunger, the mating parts of said quick release means cooperating so that said plunger can be placed in its driven state or in its undriven state at any time during the injection operation and at any position of the plunger, without substantial force being applied therebetween.
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Abstract
An angiographic injector has an injector portion which includes a rotating turret for housing two angiographic syringes in readiness for injection. The injector further employs a driving mechanism for connecting with and controlling the movement of a syringe plunger once one of the syringes is in place for injection. Through the use of guide means on each syringe and corresponding alignment means on a pressure jacket, the syringe is alignably and securely mounted within the pressure jacket on the rotating turret. Each syringe plunger is releasably connected to the driving mechanism for an injection operation, and released from the driving mechanism when the injection operation has been completed, such that the driving mechanism can be withdrawn from the syringe relative to the plunger without drawing body fluid of a patient into the syringe. Various types of plunger release mechanisms for this purpose are disclosed.
The questions raised in reexamination request No. 90/003,918 filed Aug. 7, 1995, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).
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Citations
71 Claims
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1. An angiographic injector for injecting a contrast media from an angiographic syringe which includes a movable plunger for forcing contrast media from said syringe into the vascular system of an animal, said injector comprising:
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mounting means for supporting at least one syringe for an injection operation; actuating means adjacent said mounting means for controlling the movement of said plunger in said syringe; drive means disposed at one end of said actuating means for causing retraction of said plunger in said syringe and advancement of said plunger in said syringe to force the contrast media from said syringe in the injection operation; and quick release means forming respective mating parts of said plunger and said drive means for selectively placing said plunger in a driven state by said drive means such that said drive means can retract said plunger in said syringe, and in an undriven state by said drive means such that said drive means can be retracted relative to said plunger without retraction of said plunger, the mating parts of said quick release means cooperating so that said plunger can be placed in its driven state or in its undriven state at any time during the injection operation and at any position of the plunger, without substantial force being applied therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An angiographic syringe for use in combination with an angiographic injector in which at least one syringe can be supported for an injection operation, said angiographic injector including drive means for effecting an injection operation, said syringe comprising:
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a tubular body having a discharge end; a plunger movably positioned in the tubular body, said plunger being retractable in said tubular body to draw contrast media into said syringe for the injection operation and being advanceable through said tubular body for forcing the contrast media from the discharge end of said tubular body in the injection operation; and quick release means disposed at one end of said plunger .Iadd.and movable with said plunger within said tubular body .Iaddend.for forming a part of a releasable drive connection between said drive means of said angiographic injector and said plunger such that said drive means can selectively be drivingly connected with said plunger to enable retraction of said plunger in said tubular body and to enable advancement of said plunger in said tubular body to force the contrast media from the discharge end of said tubular body in the injection operation, said quick release means being selectively releasable from said plunger at any time during the injection operation and at any position of the plunger, without substantial force being applied thereto, such that said drive means can be retracted relative to said plunger in said tubular body after the injection operation has been completed, without retraction of said plunger. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An apparatus for injecting a contrast media into the vascular system of an animal, said apparatus comprising:
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at least one angiographic syringe including a plunger movably positioned in said syringe for forcing a contrast media from said syringe; mounting means for supporting said syringe for an injection operation; actuating means adjacent said mounting means for controlling the movement of said plunger in said syringe; drive means disposed at one end of said actuating means for causing retraction of said plunger in said syringe and advancement of said plunger in said syringe to force the contrast media from said syringe in the injection operation; and quick release means forming respective mating parts of said plunger and said drive means for selectively placing said plunger in a driven state by said drive means such that said drive means can retract said plunger in said syringe, and in an undriven state by said drive means such that said drive means can be retracted relative to said plunger without retraction of said plunger, the mating parts of said quick release means cooperating so that said plunger can be placed in its driven state or in its undriven state at any time during the injection operation and at any position of the plunger, without substantial force being applied therebetween. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. An angiographic syringe for use in combination with an angiographic injector including an injector portion for receiving at least one syringe in readiness for injection, mounting means for supporting said syringe in said injector portion, said mounting means having alignment means for cooperating with said syringe, said angiographic injector including drive means for effecting said injection, and injector engagement means disposed on said drive means for engaging said syringe, said syringe comprising:
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a tubular body having an outwardly extending flange at one end thereof; a plunger slidably positioned within said tubular body for drawing contrast media therein and forcing contrast media therefrom; guide means mounted on said tubular body for cooperating with said alignment means of said mounting means for guiding said syringe into a predetermined position in said mounting means; and said plunger including plunger engagement means for cooperating with said injector engagement means, said plunder engagement means facilitating engagement with said injector engagement means in at least one predetermined rotational orientation of said tubular body and said plunger engagement means preventing engagement with said injector engagement means in orientations other than said at least one predetermined rotational orientation of said tubular body, said plunger being positioned in said tubular body in said at least one predetermined rotational orientation when said guide means cooperates with said alignment means. .Iaddend..Iadd. - View Dependent Claims (67, 68, 69)
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70. initiating an injection after such relative movement. .Iaddend..Iadd.73. An angiographic injector and syringe assembly for injecting contrast media from a syringe, said assembly comprising:
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an injector portion of the angiographic injector for receiving at least one syringe in readiness for injection; mounting means for supporting said syringe in said injector portion; drive means disposed in said angiographic injector for effecting election of contrast media from said syringe; injector engagement means disposed on said drive means for engaging said syringe; alignment means disposed on said mounting means for cooperating with said syringe; said syringe comprising a tubular body having proximal and distal open ends; guide means positioned at said distal end of said tubular body for mating with said alignment means of said mounting means for guiding said syringe into a predetermined alignment in said mounting means; and plunger means slidably positioned within said tubular body for drawing contrast media therein and forcing contrast media therefrom, said plunger means including plunger engagement means for cooperating with said injector engagement means, said plunger engagement means facilitating engagement with said injector engagement means in at least one predetermined rotational orientation of said tubular body and said plunger engagement means preventing engagement with said injector engagement means in orientations other than said at least one predetermined rotational orientation of said tubular body, said plunger being positioned in said tubular body in said at least one predetermined rotational orientation when said guide means cooperates with said alignment means.
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71. Iaddend..Iadd.4. An angiographic injector for injecting a contrast media from an angiographic syringe which includes a movable plunger for forcing contrast media from said syringe into a vascular system of an animal, said injector comprising:
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mounting means for supporting at least one syringe for an injection operation; actuating means adjacent said mounting means for controlling the movement of said plunger in said syringe; drive means disposed at one end of said actuating means for causing retraction of said plunger in said syringe and advancement of said plunger in said syringe to force the contrast media from said syringe in the injection operation; and quick release means forming respective mating parts of said plunger and said drive means for selectively placing said plunger in a driven state by the drive means such that said drive means can retract said plunger in said syringe, and in an undriven state by said drive means such that said drive means can be retracted relative to said plunger without retraction of said plunger and without contacting the inside of said syringe, the mating parts of said quick release means cooperating so that said plunger can be placed in its driven state or in its undriven state at any time during the injection operation and at any position of the plunger, without substantial force being applied therebetween. .Iaddend.
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Specification