# US 5,997,502 A · Front loading medical injector and syringe for use therewith > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,997,502 A - Document ID: US5997502A - Status: Granted - Kind: A - Application number: 08/901,602 - Filed: 1997-07-28 - Granted: 1999-12-07 - Earliest claimed: 1992-08-17 - Assignees: Medrad, Inc. - Inventors: David M. Reilly; Joseph B. Havrilla; Eugene A. Gelblum; Daniel Kazousky - Web page: https://patentgrep.com/patent/US5997502A ## CPC - A61M 5/14546: {Front-loading type injectors} - A61M 5/14566: {with a replaceable reservoir for receiving a piston rod of the pump} - A61M 2005/14553: {comprising a pressure jacket} - A61M 2205/581: by audible feedback - A61M 2205/582: by tactile feedback - A61M 2205/583: by visual feedback - Y10S 128/01: Motorized syringe - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A front-loading syringe which comprises a movable plunger for injecting liquid contrast media, is rotatably mountable on a front wall of an injector housing with an interference fit and in sealed relationship with respect thereto, with or without a pressure jacket, by a first-quick release mechanism. At the same time, the plunger is connected to an injector drive mechanism by a second readily releasable mechanism. During the mounting operation, a sensor reads injection information from an indicator device on the syringe and feeds it to an injector control. An audible-and-tactile indicating mechanism also is activated when the syringe is essentially in the desired mounted position. The syringe may include reinforcing ribs which also function as volumetric gradations, and liquid media presence-or-absence indicating dots which appear circular against a liquid media background and oval-shaped against an air background. An injection end of the syringe comprises an injector portion of reduced diameter inside a screw-threaded attachment portion of larger diameter, and may include loop-shaped reinforcing handle portions. ## Claims ### Claim 1 An injector for use with an encoding device associated with a syringe comprising a plunger and at least one mounting flange associated therewith, the encoding device providing syringe information, the injector comprising: a housing comprising at least one retaining flange for supporting the syringe and a motor operable to drive a piston, the piston positioned to engage the plunger disposed within the syringe; a sensor associated with said housing for reading the syringe information provided by the encoding device as the at least one mounting flange associated with the syringe is rotated to cause engagement with the at least one retaining flange on said housing to operably engage the syringe with the injector; and a control unit in communication with said sensor and the motor, said control unit operable to receive the syringe information from said sensor and to control the motor based on the syringe information. ### Claim 2 (depends on 1) The injector of claim 1 wherein said sensor is associated with said housing proximate to the at least one retaining flange. ### Claim 3 (depends on 1) The injector of claim 1 wherein said sensor comprises an optical reader. ### Claim 4 (depends on 1) The injector of claim 1 wherein said sensor comprises a switch. ### Claim 5 (depends on 1) The injector of claim 1 wherein the encoding device is located on a barrel of the syringe. ### Claim 6 (depends on 1) The injector of claim 1 wherein the encoding device provides liquid media injection information. ### Claim 7 (depends on 1) The injector of claim 1 wherein the encoding device provides liquid media information. ### Claim 8 (depends on 1) The injector of claim 1 wherein the sensor is operable to read the syringe information provided by the encoding device when the at least one mounting flange is rotated to cause engagement with the at least one retaining flange. ### Claim 9 A syringe for use with an injector having a housing comprising at least one retaining flange for supporting the syringe and containing a motor operable to drive a piston, a sensor associated with the housing and a control unit in communication with the sensor and the motor, the syringe comprising: a body having a front end and a rear end, an injection section connected to the front end and at least one mounting flange associated therewith; a plunger disposed within said body and operable to be driven by the piston of the injector; and an encoding device associated with said body and providing syringe information, whereby the sensor is operable to read the syringe information provided by said encoding device as the at least one mounting flange is rotated to cause engagement with the at least one retaining flange to operably engage the syringe with the injector and to forward the syringe information to the control unit, the control unit operable to receive the syringe information from the sensor and to control the motor of the injector based on the syringe information. ### Claim 10 (depends on 9) The syringe of claim 9 wherein said encoding device is disposed on said body. ### Claim 11 (depends on 10) The syringe of claim 10 wherein said encoding device is disposed on the rear end of said body. ### Claim 12 (depends on 9) The syringe of claim 9 wherein the syringe information comprises liquid media injection information. ### Claim 13 (depends on 9) The syringe of claim 9 wherein the syringe information comprises liquid media information. ### Claim 14 (depends on 9) The syringe of claim 9 wherein said encoding device comprises a bar code device. ### Claim 15 (depends on 9) The syringe of claim 9 wherein said encoding device comprises one or more raised surfaces. ### Claim 16 (depends on 7) The syringe of claim 7 wherein said encoding device comprises an optically readable device. ### Claim 17 (depends on 7) The syringe of claim 7 wherein said encoding device comprises a mechanically readable device. ### Claim 18 (depends on 9) The syringe of claim 9 wherein the at least one mounting flange is disposed on said body. ### Claim 19 An apparatus for injecting liquid media, the apparatus comprising, in combination, an injector and a syringe: wherein the injector comprises: a housing comprising at least one retaining flange for supporting the syringe and containing a motor operable to drive a piston, the piston positioned to engage a plunger disposed within the syringe; a sensor associated with the housing; and a control unit in communication with the sensor and the motor; wherein the syringe comprises: a body having a front end and a rear end, an injection section connected to the front end and at least one mounting flange associated therewith; a plunger disposed within the body and operable to be driven by the piston of the injector; and an encoding device associated with the body and providing syringe information; whereby the sensor is operable to read the syringe information provided by the encoding device as the at least one mounting flange is rotated to cause engagement with the at least one retaining flange to operably engage the syringe with the injector and to forward the syringe information to the control unit, the control unit operable to receive the syringe information from the sensor and to control the motor of the injector based on the syringe information. ### Claim 20 (depends on 19) The apparatus of claim 19 wherein the sensor is associated with the housing proximate to the at least one retaining flange. ### Claim 21 (depends on 19) The apparatus of claim 19 wherein the sensor is operable to read the syringe information provided by the encoding device when the at least one mounting flange is rotated to cause engagement with the at least one retaining flange. ### Claim 22 (depends on 19) The apparatus of claim 19 wherein the encoding device is disposed on the body of the syringe. ### Claim 23 (depends on 19) The apparatus of claim 19 wherein the at least one mounting flange is disposed on the body of the syringe. ### Claim 24 A syringe for use with an injector having a housing comprising at least one retaining flange for supporting the syringe and containing a motor operable to drive a piston, a sensor associated with the housing and a control unit in communication with the sensor and the motor, the syringe comprising: a body having a front end and a rear end and an injection section connected to the front end; a plunger disposed within said body and operable to be driven by the piston of the injector; at least one mounting flange associated with the rear end of said body; and an encoding device associated with said body and providing syringe information, whereby the sensor is operable to read the syringe information provided by said encoding device as said at least one mounting flange associated with said body is rotated to cause engagement with the at least one retaining flange on the injector housing to operably engage the syringe with the injector and to forward the syringe information to the control unit, the control unit operable to receive the syringe information from the sensor and to control the motor of the injector based on the syringe information. ### Claim 25 (depends on 24) The syringe of claim 24 wherein the sensor is associated with housing proximate to the at least one retaining flange. ### Claim 26 (depends on 24) The syringe of claim 24 wherein said at least one mounting flange is disposed on said body. ### Claim 27 (depends on 24) The syringe of claim 24 wherein said encoding device is disposed on said body. ### Claim 28 An injector for use with an encoding device providing syringe information, the injector comprising: a housing comprising at least one retaining flange and containing a motor operable to drive a piston; a sensor associated with said housing for reading syringe information provided by the encoding device, said sensor operable to read the syringe information as the encoding device is rotated to cause engagement with the at least one retaining flange on said housing; and a control unit in communication with said sensor and the motor, said control unit operable to receive the syringe information from said sensor and to control the motor based on the syringe information. ### Claim 29 (depends on 28) The injector of claim 28 wherein the encoding device is associated with a syringe. ### Claim 30 (depends on 29) The injector of claim 29 wherein the encoding device is disposed on the syringe. ### Claim 31 (depends on 28) The injector of claim 28 wherein the encoding device is associated with at least one mounting flange operable to engage the at least one retaining flange on the housing of the injector. ### Claim 32 (depends on 28) The injector of claim 28 wherein the encoding device provides liquid media injection information. ### Claim 33 (depends on 28) The injector of claim 28 wherein the encoding device provides liquid media information. ### Claim 34 (depends on 28) The injector of claim 28 wherein the sensor is operable to read the syringe information when the encoding device is rotated to cause engagement with the at least one retaining flange. ### Claim 35 A syringe for use with an injector having a housing comprising at least one retaining flange and containing a motor operable to drive a piston, a sensor associated with the housing proximate to the at least one retaining flange and a control unit in communication with the sensor and the motor, the syringe comprising: a body having a front end and a rear end and an injection section connected to the front end; a plunger disposed within said body and operable to be driven by the piston of the injector; and an encoding device associated with said body and providing syringe information, whereby the sensor is operable to read the syringe information provided by said encoding device as said encoding device is rotated to cause engagement with the at least one retaining flange to operably engage the syringe with the injector and to forward the syringe information to the control unit, the control unit operable to receive the syringe information from the sensor and to control the motor of the injector based on the syringe information. ### Claim 36 (depends on 35) The syringe of claim 35 wherein said encoding device is disposed on said body. ### Claim 37 (depends on 35) The syringe of claim 35 wherein said encoding device is associated with the rear end of said body. ### Claim 38 (depends on 35) The syringe of claim 35 wherein the sensor is operable to read the syringe information when the encoding device is rotated to cause engagement with the at least one retaining flange. ### Claim 39 An injector for use with an encoding device associated with a syringe, the encoding device providing syringe information, the injector comprising: a housing comprising at least one retaining flange and containing a motor operable to drive a piston; a sensor associated with said housing proximate to the at least one retaining flange for reading syringe information provided by the encoding device, said sensor operable to read the syringe information as the encoding device is rotated to cause engagement with the at least one retaining flange on said housing; and a control unit in communication with said sensor and the motor, said control unit operable to receive the syringe information from said sensor and to control the motor based on the syringe information. ### Claim 40 (depends on 39) The injector of claim 39 wherein the sensor is operable to read the syringe information when the encoding device is rotated to cause engagement with the at least one retaining flange.