Abstract: The present syringe adapter (100), which permits use of syringes (40) of various types, sizes and configurations to be used with a front-loading injector (10), includes a removable injector face plate (120) having a releasable mounting mechanism (122a, 122b) for attaching the adapter face plate (120) to a front-load injector (10), a reducing sleeve (140) having a recess (190) for receiving the distal flange (44) of syringe (40), locking pivot arms (220, 240) pivotly attached to the reducing sleeve (140) to releasably engage syringe flange (44), and a piston extension (320) provided for extending the injector drive piston (16) for engagement with syringe plunger (46).

Abstract: Since this syringe has projections provided on the rear surface of a flange of a syringe barrel, when it is inserted in an insertion groove of a cylinder holder, the tips of projections are compressed and the flange is fixed. Consequently, even when a solution having high viscosity is injected at higher pressure, breakage does not occur easily. Further, pressure-receiving area may also be increased by providing a guide defining mounting direction of a syringe, alternatively, a positioning mechanism may be provided so as to obtain mounting at a correct position, or the surface of a flange may be roughened.

Abstract: A catheter includes an elongated tubular member having a lumen extending through the elongated tubular member. The elongated tubular member also has an outer surface, a distal end and at least one opening. The opening extends between the inner and outer surfaces, provides communication between the outer surface and the lumen and includes at least two straight edges extending parallel to the lumen of the tubular member.

Abstract: An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a reservoir, one or more drive train components, a sensor, and an electronics system. The motor is contained within the housing. The reservoir contains the fluid to be delivered. The one or more drive train components react to stimulus from the motor to force the fluid from the reservoir into the user. The sensor is positioned to measure a parameter associated with the motor or a drive train component, and the sensor produces three or more output levels across a range of measurements. The electronics system processes the sensor output levels to declare when an occlusion exists.

Abstract: Embodiments of an injector, syringe, syringe interface, and piston/plunger assembly for an injector (of contrast medium, for example) are described. Preferably, the syringe is adapted to engage a syringe interface mechanism such that the syringe may be connected to an injector without regard to any particular orientation of the syringe to the injector or to the piston/plunger assembly.

Abstract: Sensors are described that may be provided in a medication pump. A magnetic sensor detects rotation of an element that is rotated by a motor, where a magnet covers a portion of the element. A light sensor may also be provided that detects if a cartridge is present in a cartridge chamber. A medication cartridge includes an opaque area at its open end for use with the light sensor. Methods of using these sensors to operate the pump area also described.

Abstract: A safety cap cover for use with a medication pump and a method for using a pump are described, where the cap cover makes the pump is more difficult for a child to open. The cap cover according to the present invention is configured to reversibly attach to and enclose a pump cap of a medication pump. The cap cover is movable from a first state to a second state on the pump cap. In the first state, the safety cap cover rotates freely around the pump cap. In the second state, the cap cover contacts an exterior surface of the pump cap so that the user can apply torque on the pump cap through the cap cover to rotate the pump cap. Preferably, the safety cap cover is moved from the first state to the second state by applying a radially inward force on opposing sides of the cap cover.

Abstract: A microinjection pump for administration of fluid pharmacological compounds to unrestrained and freely behaving animals is provided. The micro-pump employs a screw drive mechanism that is actuated by a small stepper motor. The pump moves fluids by direct mechanical displacement from two micro-syringes arranged in parallel. The drive mechanism incorporates a threaded central drive screw that is attached to the stepper motor drive shaft, The threads of the central drive screw engage the threads of two parallel, but oppositely turned (left hand turned and right hand turned) threaded rods. By the frictional action of the helical threads of the threaded drive screw with the threads of the threaded rods the threaded rods are moved linearly and depress the plungers of the attached micro-liter syringes. Medications are administered to animals through flexible tubing.

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.

Abstract: A system and method for automatically controlling the quantitative delivery of, and then recording the occurrence of the administration of medicines to animals is disclosed and claimed. An intelligent syringe receives and automatically implements an instruction relating to a preferred quantity of medicine to be delivered to a specific animal, based on the measured weight of the animal. Upon actuation of the intelligent syringe, a first signal containing information relating to the actuation of the intelligent syringe, and the resulting injection of the animal is transmitted to a data repository. An EID is attached to the animal to provide a tamper-resistant electronic identification of the animal, and a receiver is utilized for receiving the first signal from the intelligent syringe and the electronic identification of the animal. Thereafter, a computer database maintains the information contained in the first signal for selective access and analysis.

Abstract: A syringe pump has a plunger head retainer with two retainer arms mounted on shafts extending parallel to the syringe axis. Each shaft carries a gear, which is engaged by common gear wheel mounted on a threaded shaft. Initially, the shaft is rotated to displaces the gear and hence the retainer arms axially forwardly, and thereafter swing the retainer arms outwardly to an open position. After the syringe has been loaded in the pump, the plunger head retainer is driven forwards until a pad coupled with a force sensor detects contact with the head. This causes the retainer arms to be swung in across the forward side of the plunger head and to be pulled rearwardly against the plunger head. The pump then reduces the force applied by the retainer arms to ensure that the force sensor can respond to force on the plunger during expulsion of liquid from the syringe.

Abstract: An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a reservoir, one or more drive train components, a sensor, and an electronics system. The motor is contained within the housing. The reservoir contains the fluid to be delivered. The one or more drive train components react to stimulus from the motor to force the fluid from the reservoir into the user. The sensor is positioned to measure a parameter associated with the motor or a drive train component, and the sensor produces three or more output levels across a range of measurements. The electronics system processes the sensor output levels to declare when an occlusion exists.

Abstract: A delivery device including a) a housing, b) a container for a fluid arranged in the housing, the container having an opening, c) a delivery conduit connected in fluid communication with the opening, the conduit having a front end in flow respect distal from the container and a rear end in flow respect proximal to the container, the front end and the rear end defining an axis therebetween and a forward direction and a rearward direction, and d) a pump arranged to deliver fluid at least in a direction from the container through the conduit, the device comprising, a sensor able to change state in at least one respect in response to a predetermined proximity of an object to the sensor in a sensing direction, a converter, separate from or integral with the sensor, converting at least one of the sensor states into an electromagnetic signal, and a processor, receiving the electromagnetic signal and delivering a control signal to an operational component of the device.

Abstract: An ambulatory infusion pump (10) has a syringe barrel (16) having a fluid chamber (19) and an inner wall (22). The pump (10) further has an infusion engine (14) for moving fluid through the syringe barrel (16). The infusion engine (14) has a member (42) for engaging a portion of the syringe barrel (16) for moving the engine (14) linearly along the syringe barrel (16).

Abstract: A syringe for use with a powered injector to inject a fluid into a patient includes at least a first indicator positioned on the syringe at a predetermined axial position. The distance between a rearward surface of the first indicator and a predetermined position on the powered injector provides information about the syringe configuration. The first indicator can, for example, be a rear surface of the attachment flange. An injector system includes a powered injector having a drive member and at least one sensor for detecting energy. The injector system also includes a syringe having at least a first indicator positioned on the syringe at a predetermined axial position. The energy detected by the sensor is determined by the axial position of the indicator when the syringe is attached to the powered injector. The axial position of the indicator thereby provides information about the syringe configuration.

Abstract: A first sensor (13-1), the mounting position of the first sensor (13-1) being recognized as a counting number of instruction pulses to a pulse motor (3), is arranged along a plate (11) with slits of an encoder at a portion between a position where a pushing holder (7) is connected to a plunger (9) for the liquid infusion, and a start position where the pushing holder (7) is separated from the plunger (9). A counting means (16) for counting encoder pulses from the encoder, is reset when a first sensor (13-1) is detected by a position detecting device (14) moved together with the pushing holder (7), and started to count the encoder pulses according to the movement of the pushing holder (7). A time to complete the liquid infusion is calculated by using a distance between the position where the plunger (9) is connected to the holder (7) and a liquid infusion finish position proper to the syringe, and a predetermined liquid infusion speed.

Abstract: An injector for use in injecting a fluid in a medical injection procedure includes a drive having a motor to pressurize the fluid; a sensor to provide a measure of fluid pressure; and a pressure monitor in communication with the sensor and the drive to stop the motor using 4-quadrant control when the sensor communicates a measured pressure of at least a pressure hazard limit. The pressure monitor also limits power input to the motor to a power limit once the sensor communicates a measured pressure of at least a power limiting pressure. The power limiting pressure is below the pressure hazard limit.

Abstract: Described is an electronic injection device wherein an electronic circuit is designed to work in two alternative modes: an air shot mode and a dose injection mode. When working in the air shot mode a small predetermined air shot dose is pressed out from the ampule when the injection button is actuated. When working in the injection mode, a dose set by operation of the dose setting means is injected by operation of the injection button. The electronic injection device is normally working in the air shot mode but shifts to work in the dose injection mode when it receives a signal indicating that the dose setting means has been operated. The circuit returns to its air shot mode when receiving a signal indicating that the set dose has been injected. This signal can originate either from a switch indicating that the protection cap is mounted or from a switch indicating that the injection button has been pressed.

Abstract: An angiographic injector system and a method of controllably delivering medical fluid to a patient from an angiographic injector system are disclosed. A multiple processor control system is used to actively control the injection process and to monitor sensed functions of the system. The multiple processors provide dual redundancy safety circuits for critical control functions such as syringe motor drive speed and current. A motor/servo-amplifier nested control function is also disclosed. A unique method and apparatus are disclosed for establishing injection parameter default values just prior to an injection procedure that are based on physiological values of the patient to be treated. The injector system uses an interactive display panel that presents sequenced set-up screens to the user and which enables the user to select injection procedures, parameters and other modes of operation directly through the interactive panel.

Abstract: Disclosed is an automatic syringe device including a syringe pump having a housing defined therein with a syringe receiving chamber for receiving a syringe, a control unit received in the housing and adapted to control a motor adapted to supply, to the syringe pump, a drive force for injecting a liquid medicine out of the syringe, a transmitter/receiver unit received in the housing and electrically connected to the control unit, and a remote controller adapted to control the control unit via the transmitter/receiver unit. The remote controller includes a transmitter/receiver unit adapted to conduct transmission and reception of signals to and from the control unit of the syringe pump via the transmitter/receiver unit of the syringe pump, a control unit adapted to control the transmitter/receiver unit of the remote controller, and a display adapted to display an ON or OFF state and an operation mode of the syringe pump under a control of the second control unit.

Abstract: A pump system for an infusion system includes a linear drive (36, 36′) which minimizes the space occupied by the pump components in a portable housing (10, 10′). A motor (34) and a motor drive shaft (42) are arranged in parallel with, and adjacent to a syringe (14, 14′) and lead screw (94, 94′). A gear box (54) connects the drive shaft and lead screw to transfer rotational movements between them. A piston driving member, such as a cone (116) or drive nut (116′) converts the rotational movement of the lead screw into linear motion of a syringe piston (24). Sensors (150, 152) detect when the piston or cone is in a “home” position and in an “end” position, respectively. Optionally, a proximity sensor (170) is used to ensure that the cone and the piston (24) are abutting during dispensing. Alternatively, a clamping member (350) selectively clamps the lead screw (94′) against linear motion in at least a dispensing direction.

Abstract: An angiographic injector system and a method of controllably delivering medical fluid to a patient from an angiographic injector system are disclosed. A multiple processor control system is used to actively control the injection process and to monitor sensed functions of the system. The multiple processors provide dual redundancy safety circuits for critical control functions such as syringe motor drive speed and current. A motor/servo-amplifier nested control function is also disclosed. A unique method and apparatus are disclosed for establishing injection parameter default values just prior to an injection procedure that are based on physiological values of the patient to be treated. The injector system uses an interactive display panel that presents sequenced set-up screens to the user and which enables the user to select injection procedures, parameters and other modes of operation directly through the interactive panel.

Abstract: A method of preventing extravasation of contrast agent during a computed tomography injection. An automatic injector device facilitates ease of accomplishing the method. The method includes establishing the absence of extravasation using an absorbable injectate, such as saline, prior to injecting the contrast agent. The device includes a computerized injector head capable of switching between two injectates without physical human intervention. The device is controlled by a remote operating panel located in a control room that is protected from X-ray radiation. The device includes various software driven safety features that prevent the occurrence of unsafe conditions.

Abstract: An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a reservoir, one or more drive train components, a sensor, and an electronics system. The motor is contained within the housing. The reservoir contains the fluid to be delivered. The one or more drive train components react to stimulus from the motor to force the fluid from the reservoir into the user. The sensor is positioned to measure a parameter associated with the motor or a drive train component, and the sensor produces three or more output levels across a range of measurements. The electronics system processes the senor output levels to declare when an occlusion exists.

Abstract: An injector for injecting a fluid from a syringe, which includes an elongated body, a mounting member positioned on a rear portion of the body, and a plunger moveably positioned within the body of the syringe, includes a housing having a front wall and a retainer on the front wall. The retainer is adapted to cooperate with the mounting member to releasably retain the syringe on the front wall. The retainer includes a powered loader adapted to bring the mounting member and the retainer into secure engagement to securely connect the syringe to the injector. The injector further includes a powered drive member in the housing. The drive member is adapted to engage the plunger and control the movement of the plunger.

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.

Abstract: An infusion apparatus for administering drugs to a patient has a threaded shaft acting on a plunger of a syringe and is provided with protection against overdose caused by free flow. The protection is in the form of an adapter connected to the threaded shaft and having a neck and head with roughened surface extending into a threaded seat in the plunger.

Abstract: A syringe plunger driver system capable of engaging different sized syringes. A drive head includes a pushing surface as well as spaced-apart arms biased toward each other and toward the pushing surface. An activating lever moved to a first position moves the arms outward away from each other and forward toward the syringe barrel for ease in loading a syringe. Moving the lever to a second position permits the biasing devices connected to the arms to move the arms inward to capture the syringe plunger and then rearward to hold the plunger flange against the pushing surface to resist siphoning.

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.

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.

Abstract: Apparatus and methods for maintaining the suspension of an agent suspended in a suspending medium in which a container holding the agent is revolved about an axis to create and maintain the suspension and the agent is selectively provided from the container. The agent may be selectively provided from the container while the container is simultaneously or intermittently revolved in a planetary orbit about an axis of rotation generally parallel to an axis of the container for maintaining the suspension. Alternatively, the container may be rotated about its longitudinal axis by a source of rotation to create and maintain the suspension while the agent is provided from the container due to a force imparted by the source of rotation.

Abstract: A syringe pump has a motor rotating a leadscrew to drive a plunger head actuator along it. The head actuator engages the plunger of a syringe and moves the plunger along the syringe barrel to dispense medication. An optical encoder mounted on the leadscrew is rotated by the motor to produce a pulse output. A control unit times the interval between the pulses and compares these timings with a stored value representative of a predetermined multiple of the minimum time. If the head actuator is obstructed, the speed of rotation of the motor is slowed and the time interval between pulses rises. When this exceeds the stored value, the control unit stops the drive to the head actuator and generates an alarm.

Abstract: The pressure jacket systems of the invention are used to permit the front loading and removal of a syringe from an injector and include a first jacket segment and a second jacket segment surrounding the exterior surface of the syringe, interior surfaces comformable to the exterior surface of the syringe, a mechanism which allows movement of the first jacket segment in relation to the second jacket segment to permit insertion and removal of the syringe from the pressure jacket, and a mechanism for securing the first and second jacket segments in a fixed relationship upon insertion of the syringe.

Abstract: The invention relates to a dispenser for dischargeable media, preferably containing at least one active pharmaceutical substance and packed in portioned manner in storage chambers of a storage means, as well as a conveying device for the supply of the storage means.

Abstract: The present invention relates to a drug delivery device wherein a dose to be apportioned from a cartridge is set by changing the relative position of co-operating dose setting elements (3, 5) and is injected by pressing a button (5) until this button abuts a stop (6). By operation of count up (7) or count down (8) buttons the dose is set and read into an electronic circuit (9) comprising a microprocessor and the dose setting movement of the dose setting elements relative to each other is performed by a motor (11) controlled by the circuit in accordance with the read in dose. The set dose is shown on a display (10). The motor (11) is further controlled to perform certain movements of the piston rod (3) so as retraction of this rod when a cartridge (1) is going to be changed an advancing of the piston rod to abutment with the piston (2) after the cartridge has been changed and further to advance this piston to expel air from the cartridge.

Abstract: A fluid injection arrangement, in the context of patient imaging systems, in which phases of contrast medium injection and flushing medium injection can be freely and selectably ordered so as to make available to the operator and patient a vast array of possible protocols that has hitherto been essentially unattainable. Also contemplated is the use of a “hold” phase, involving an indefinite pause between phases of a protocol, in connection with such imaging systems. Further contemplated is the use of a “pause” phase in which a pause of fixed duration is pre-programmed into the protocols of MRI injector systems.

Abstract: The present syringe adapter (100), which permits use of syringes (40) of various types, sizes and configurations to be used with a front-loading injector (10), includes a removable injector face plate (120) having a releasable mounting mechanism (122a, 122b) for attaching the adapter face plate (120) to a front-load injector (10), a reducing sleeve (140) having a recess (190) for receiving the distal flange (44) of syringe (40), locking pivot arms (220, 240) pivotly attached to the reducing sleeve (140) to releasably engage syringe flange (44), and a piston extension (320) provided for extending the injector drive piston (16) for engagement with syringe plunger (46).

Abstract: The present invention involves a device for tissue, especially hard tissue, penetration device which incorporated a novel paddle-shaped needle for low friction rotatory penetration of hard tissue and a controlled delivery or extraction system for transfer of material from to device into a tissue site or transfer of material from the tissue site to the device. The delivery system or extraction system includes at least on solenoid or other similar device.

Abstract: The present invention provides an auto-injection device including a housing, a container from which a product is dispensed by advancing a piston, the container shiftably accommodated by the housing and carrying a needle, and a drive unit including a driven member, wherein the driven member is shiftably accommodated by the housing and, during an auto-injection, is adapted for inserting the needle and advancing the container to a predetermined frontal position in relation to the housing and advancing the piston within the container for dispensing of the product, wherein the driven member remains uncoupled with the piston until the container reaches its frontal position, and upon the container reaching its frontal position, the driven member detaches from the container and couples with the piston for advancing the piston within the container.

Abstract: The present invention provides prefillable syringes and injectors for use therewith that expand and/or facilitate a variety of medical procedures involving the injection of a liquid medium. In several embodiments, the present syringes and injectors enable the use of current syringe materials at higher pressures than previously attainable or the use of other materials not previously usable with current high pressure-syringe and injector designs. In one embodiment, a syringe comprises an elongated cylindrical main body having a first pair and a second pair of mounting flanges encompassing collectively an arcuate length equal to at least approximately 180° of the circumference of the rear portion of the cylindrical main body for releasably mounting the syringe in a desired position relative to the front wall of the injector housing.

Abstract: An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a reservoir, one or more drive train components, a sensor, and an electronics system. The motor is contained within the housing. The reservoir contains the fluid to be delivered. The one or more drive train components react to stimulus from the motor to force the fluid from the reservoir into the user. The sensor is positioned to measure a parameter associated with the motor or a drive train component, and the sensor produces three or more output levels across a range of measurements. The electronics system processes the senor output levels to declare when an occlusion exists.

Abstract: Apparatus and methods for reducing the load on a patient's left ventricle while perfusing ischemic myocardium are provided using a first conduit having an inlet end configured for insertion into the left atrium, left ventricle or aorta coupled to a second conduit having an outlet end configured for insertion into the coronary venous vasculature via the coronary ostium. A motor-driven or hydraulically-actuated pump may be coupled between an outlet end of the first conduit and an inlet end of the second conduit to direct flow between the first and second conduits. Control circuitry is provided for use with the motor-driven pump to control the pump with a user selected duty cycle.

Abstract: Since this syringe has projections provided on the rear surface of a flange of a syringe barrel, when it is inserted in an insertion groove of a cylinder holder, the tips of projections are compressed and the flange is fixed. Consequently, even when a solution having high viscosity is injected at higher pressure, breakage does not occur easily. Further, pressure-receiving area may also be increased by providing a guide defining mounting direction of a syringe, alternatively, a positioning mechanism may be provided so as to obtain mounting at a correct position, or the surface of a flange may be roughened.

Abstract: An adapter includes a syringe carrier adapted to seat at least a portion of the syringe. The syringe carrier includes at least one rearward facing abutment member to abut at least one forward facing surface on a syringe. The syringe carrier includes an opening therein to allow a drive member of an injector to communicate forward force to the plunger through abutment without connective engagement between the drive member and the plunger. The adapter further includes a releasable mounting mechanism positioned to the rear of the syringe carrier to mount the adapter in a desired position relative to the front wall of the injector. An adapter includes a first section and a second section that are rotatable relative to each other about a hinge axis generally perpendicular to a longitudinal axis of the adapter.

Abstract: An implant-type chemical supply device includes: a supply tube for supplying chemicals from a chemical tank; a pump unit having an actuating lever which is rotated by a step motor and has rollers on both ends thereof so that the rollers are arranged in contact with the halfway of the supply tube, for extruding the chemicals within the supply tube by the rollers to supply the chemicals; a waveform synthesizing circuit for producing drive pulse groups each having a different effective power; a drive circuit for supplying any one of the drive pulse groups to the step motor in synchronism with a time signal; a detection circuit for generating a non-rotation signal when an induced voltage developed in the drive coil within the step motor by free oscillations of the step motor is equal to or less than a given value after the drive pulse is supplied to the step motor; and a control circuit for controlling the drive circuit so that the drive pulse having an effective power larger by one in magnitude than that of the

Abstract: An injector for medical use, in particular with semisolid substances, the injector comprising a case and at least one injection electric motor pressing against a piston acting on the moving end of a cartridge, the motor being movable in translation inside the body in order to exert force on the axis.

Abstract: The present invention involves a device for tissue, especially hard tissue, penetration device which incorporated a novel paddle-shaped needle for low friction rotatory penetration of hard tissue and a controlled delivery or extraction system for transfer of material from to device into a tissue site or transfer of material from the tissue site to the device. The delivery system or extraction system includes at least on solenoid or other similar device.

Abstract: Apparatus and methods for the power and computer assisted injection of local anesthetic into a patient in a virtually pain free manner, in which anesthetic pressure is automatically monitored as an input to the computer, in which the patient is able at any time to order the automatic reduction of anesthetic pressure and in which a simple single pole switch is the only control input to the computer required of the doctor administering the injection.

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.

Abstract: This invention relates generally to the field of Magnetic Resonance Imaging (MRI) systems for generating diagnostic images of a patient's internal organs and more particularly, this invention relates to improved MRI systems with decreased interference between the magnetic field used for producing diagnostic images and the magnetic fields generated by the electric motors used for driving the pistons of the contrast media injectors. Additionally, the system employs an improved communication link between an externally located system controller and the injection head control unit located within the electromagnetic isolation barrier which defines the magnetic imaging room.