The disclosed principles provide a vein graft preparation pump, and related methods of use and manufacturing thereof, providing a constant and uniform pressure of fluid flowed through a vein graft being prepared for use in a bypass procedure. An exemplary pump includes a syringe holder having an opening for holding a syringe body, and a slot formed within the opening for receiving a flange of the syringe body. The syringe holder also includes left and right side rails, and a spring housing coupled to rear ends of the side rails to secure the rear end of a spring therein. A plunger depressor includes a back in contact with the front end of the spring, and a front having a plunger base for engaging a syringe plunger. Decompression of the spring moves the plunger depressor along the syringe holder during use of the pump thereby providing constant and uniform pressure depressing said syringe plunger.
The disclosed principles provide regulated pressurization and continuity/uniformity in the pressure applied through harvested veins using a unique vein graft preparation pump. Generally speaking, the apparatus incorporates one or more elastic members, each with a predetermined elastic constant or modulus of elasticity, or alternatively a collective predetermined elastic constant or collective modulus of elasticity, that is sufficient to deliver fluids from a syringe through a vessel cannula inserted into the vein section selected for a grafting procedure. Additionally, the disclosed apparatus provides only a limited amount of pressure such that no injury is caused to the vein. Pressure and flow are limited and maintained constant via use of the one or more elastic members, i.e., no pressure changes/spikes, which provides uniform pressurization at a predetermined amount safe for the harvested vein section, thereby eliminating the human error present with manual pressurization during distension of grafted veins.
An elastomeric vein graft preparation pump. The elastomeric vein graft preparation pump can include an elastomeric compliant body configured to contain a fluid, a fluid conduit coupled to the elastomeric compliant body, and a control valve disposed through the fluid conduit. The control valve is configured to regulate a flow of the fluid through the fluid conduit. The elastomeric compliant body provides an elastic recoil pressure based on a volume of the fluid contained in the elastomeric compliant body, and the fluid flows through the fluid conduit at a pressure based on the elastic recoil pressure.
A61M 60/148 - Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient’s body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
A61M 60/268 - Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
4.
PRESSURE REGULATED VEIN GRAFT PREPARATION PUMP SYSTEM AND METHOD OF USE
A pressure-regulated vein graft preparation pump for preparing a vein graft. The pressure-regulated vein graft preparation pump includes: a source of pressurized fluid which is configured to supply the pressurized fluid through a flow path extending through a fluid conduit, a cannula configured to be coupled to an end of the fluid conduit, and a pressure control device coupled to the cannula. The pressure control device is located downstream from the source of the pressurized fluid and configured to limit a pressure exerted on the fluid conduit by the pressurized fluid.
The disclosed principles prevent over pressurization of harvested veins by controlling the amount and consistency of pressure applied through the veins from a continuous flow of fluid. This combination of regulated pressurization and continuity/uniformity in the pressure applied through veins is provided using a preparation pump constructed in accordance with the disclosed principles. In some embodiments the pump incorporates a spiral spring to deliver fluids from a bladder within the pump and through a vessel cannula inserted into the grafted vein, and in other embodiments the pump incorporates magnets to compress the bladder. The disclosed apparatus provides only a limited amount of pressure such that no injury is caused to the vein. Pressure and flow are limited and maintained constant, i.e., no pressure changes/spikes, providing uniform pressurization at a predetermined amount safe for the harvested vein, thereby eliminating the human error present with manual pressurization during distension of grafted veins.
A61M 60/135 - Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient’s body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting
A61M 60/855 - Constructional details other than related to driving of implantable pumps or pumping devices
An embodiment includes a custom-forming peripheral intravenous (PIV) catheter stabilization system that surrounds and conforms to the PIV catheter hub and/or a luer fitting and/or a needleless connector (NC) administration set connection. The embodiment provides a uniquely stable, energy absorbing primary intravenous (IV) stabilization system.
The disclosed principles provide for single use caps that may be applied to any of a number of receptacles, containers, vessels, needless connectors, or other device. A single use cap as disclosed herein includes a component that, when the cap is threaded onto a receptacle or device, is moved from an “unused” to a “used” position by the twisting force applied to the cap when secured onto the receptacle or device. Specifically, once the threads of the receptacle or device are received into the cap and a twisting or tightening force is continued to be applied to the cap, the continued twisting force causes this component to rotate laterally so that once the cap is removed from the receptacle or device, the threads of the cap are no longer reachable by the threads on the receptacle or device.
B65D 55/08 - Annular elements encircling container necks
B65D 39/10 - Threaded or like closure members secured by rotationBushes therefor with bayonet cams
B65D 41/06 - Threaded or like caps or cap-like covers secured by rotation with bayonet cams
B65D 45/32 - Clamping or other pressure-applying devices for securing or retaining closure members for applying radial pressure, e.g. contractible bands encircling closure member
A sealing device for sealing an opening of an apparatus. The sealing device has a head that defines a cavity and a neck that defines a passage disposed between the cavity at a first end of the neck and an aperture at a second end of the neck. The aperture is configured to collapse and expand, having a first diameter in a collapsed configuration and a second diameter in an expanded configuration. The interior surface of the neck includes an engagement interface that is configured to releasably engage with a spacer. When the engagement interface is engaged with the spacer, the neck is in the expanded configuration.
A safety cap for use with a needleless connector. The safety cap includes a body configured to at least partially enclose a head of the needleless connector (NC). The body is configured to achieve a first configuration that can be securely sealed to the NC and a second configuration that cannot be securely sealed to the NC. The second configuration is different from the first configuration. The safety cap also includes a detent in communication with the body which is configured to prevent the body from transitioning from the second configuration back to the first configuration.
A single use cap for connectors and corresponding method of use. The single use cap has a carrier with a body including a base that defines an opening separated from an end wall by a side wall. The opening leads into a cavity sized to receive a connector head. The single use cap also has an elastomeric sleeve releasably coupled to the carrier to span the opening. The elastomeric sleeve is configured to be transferred to the connector upon insertion of the head through the opening and at least partially into the cavity.
A single use cap for connectors and corresponding method of use. The single use cap has a carrier with a body including a base that defines an opening separated from an end wall by a side wall. The opening leads into a cavity sized to receive a connector head. The single use cap also has an elastomeric sleeve releasably coupled to the carrier to span the opening. The elastomeric sleeve is configured to be transferred to the connector upon insertion of the head through the opening and at least partially into the cavity.
An embodiment provides an adjustable intravenous (IV) securement band with non-occlusive retention in case of excessive force (i.e., automatically loosens) and traction for securing an IV to a patient’s arm. Embodiments may further include features such as guides and or channels on the band to hold tubing. Embodiments may be secured to patients to be used as a non-adhesive securement aid for tubing/catheter (e.g., IV’s, enteral tubes, Foley catheters, endotracheal tubes, nasogastric (NG) tubes, chest tubes, and the like) retention on patients. An embodiment includes a series of separable flaps, any of which may be separated from the band to adjust the length of the band
An apparatus, system, and method for controlling tracheostomy weaning. The apparatus includes a lumen defining a flow path for air. The flow path is configured to communicate fluidically with an airway of a patient. A control valve coupled to the lumen is configured to automatically and selectively occlude the lumen to control a flowrate of the air passing through the lumen in real time based on respiratory data obtained from the patient.
The present disclosure is related to an apparatus, system, and method of thermal detection during surgical or medical procedures. These procedures can include open-heart surgery with a pump connected to a thermal detection unit and a computing device for sending and receiving signals to control the pump. Detecting thermal changes with a thermal detection unit in an organ or tissue and controlling a pump based on the analysis of the image generated with a thermal imager unit from the detected thermal changes. The thermal detection system has a detection and imaging unit, coupled to a computing device for processing and analysis and utilized as a part of a control system for a perfusion pump.
A61B 5/00 - Measuring for diagnostic purposes Identification of persons
A61B 90/50 - Supports for surgical instruments, e.g. articulated arms
G16H 20/17 - ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to drugs or medications, e.g. for ensuring correct administration to patients delivered via infusion or injection
G16H 30/40 - ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
G16H 40/63 - ICT specially adapted for the management or administration of healthcare resources or facilitiesICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
G16H 50/30 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indicesICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for individual health risk assessment
The present disclosure is related to an apparatus, system, and method of thermal detection during surgical or medical procedures. These procedures can include open-heart surgery with a pump connected to a thermal detection unit and a computing device for sending and receiving signals to control the pump. Detecting thermal changes with a thermal detection unit in an organ or tissue and controlling a pump based on the analysis of the image generated with a thermal imager unit from the detected thermal changes. The thermal detection system has a detection and imaging unit, coupled to a computing device for processing and analysis and utilized as a part of a control system for a perfusion pump.
An embodiment includes a cardioplegia delivery system having a console, controller, and disposables. The system aides the perfusionist in cardioplegia delivery to the patient during Cardiopulmonary Bypass Surgery. The console, in conjunction with the disposables, combines blood from the heart-lung machine and crystalloid from the IV-bag in a specified ratio and then adds in a drug (arrest agent and/or additive). The electro-mechanical console incorporates a blood/crystalloid pump, temperature controllable water circulation system, pressure and temperature monitors, a sensor interface with the disposables, an arrest agent pump, an additive pump and ultra-sonic air detection sensors. The system monitors and controls the blood-crystalloid ratio, drug concentration, flow rate, pressure, temperature, and delivery route of the cardioplegia solution delivered to the patient. The system is a software-controlled system with a graphical user interface controller. The controller is utilized to initiate/stop cardioplegia delivery, monitor delivery parameters and view/save relevant case information and data.
An embodiment provides an adjustable band with non-occlusive retention in case of excessive force (i.e., automatically loosens) and traction for the broad use of tubing management in medical device and patient contact applications. Embodiments may further include features such as guides and or channels on the band to hold tubing. Embodiments may be secured to patients to be used as a non-adhesive securement aid for tubing/catheter (e.g., IV's, enteral tubes, Foley catheters, endotracheal tubes, nasogastric (NG) tubes, chest tubes, and the like) retention on patients.
B65D 63/10 - Non-metallic straps, tapes, or bandsFilamentary elements, e.g. strings, threads or wiresJoints between ends thereof
F16B 2/08 - Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using bands
A stent for use in the nasolacrimal duct of a patient's eye. The stent is used to maintain and improve the patency of the nasolacrimal duct. The stent uses a hollow shaft to create a fluid pathway from the punctum to the inferior meatus. Either the superior or inferior punctum can be selected for insertion of the stent. An inserter is used to position the flexible stent into position. A guidewire attached to the inserter is removed from the stent and it transforms from its collapsed state to its deployed state. A first anchor stabilizes the proximal end of the stent to the punctum and ampulla. A second anchor stabilizes the proximal end of the stent near the inferior meatus. The second anchor can take any of several deployed shapes, such as a pigtail or fins.
A61F 2/88 - Stents in a form characterised by wire-like elementsStents in a form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
A61B 17/12 - Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
A61F 2/95 - Instruments specially adapted for placement or removal of stents or stent-grafts
A61M 29/00 - Dilators with or without means for introducing media, e.g. remedies
An embodiment includes a valve comprising: a valve channel that couples a valve input to a valve output; a one-way valve included within the channel; a filter; a first pressure relief port, wherein the first pressure relief port is configured to relieve negative pressure when pressure at the valve output is less than pressure at the valve input; a second pressure relief port, wherein the second pressure relief port is configured to relieve positive pressure when pressure at the valve output is greater than pressure at the valve input; wherein the one-way valve includes a monolithic portion that simultaneously seals the channel, the first pressure relief port, and the second pressure relief port; wherein the filter covers the first pressure relief port.
An embodiment includes a valve comprising: a valve channel that couples a valve input to a valve output; a one-way valve included within the channel; a filter; a first pressure relief port, wherein the first pressure relief port is configured to relieve negative pressure when pressure at the valve output is less than pressure at the valve input; a second pressure relief port, wherein the second pressure relief port is configured to relieve positive pressure when pressure at the valve output is greater than pressure at the valve input; wherein the one-way valve includes a monolithic portion that simultaneously seals the channel, the first pressure relief port, and the second pressure relief port; wherein the filter covers the first pressure relief port.
F16K 17/02 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side
F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only
F16K 15/02 - Check valves with guided rigid valve members
An embodiment includes a valve comprising: a valve channel that couples a valve input to a valve output; a one-way valve included within the channel; a filter; a first pressure relief port, wherein the first pressure relief port is configured to relieve negative pressure when pressure at the valve output is less than pressure at the valve input; a second pressure relief port, wherein the second pressure relief port is configured to relieve positive pressure when pressure at the valve output is greater than pressure at the valve input; wherein the one-way valve includes a monolithic portion that simultaneously seals the channel, the first pressure relief port, and the second pressure relief port; wherein the filter covers the first pressure relief port.
F16K 15/02 - Check valves with guided rigid valve members
F16K 17/02 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side
F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only
An embodiment includes a cardioplegia delivery system having a console, controller, and disposables. The system aides the perfusionist in cardioplegia delivery to the patient during Cardiopulmonary Bypass Surgery. The console, in conjunction with the disposables, combines blood from the heart-lung machine and crystalloid from the IV-bag in a specified ratio and then adds in a drug (arrest agent and/or additive). The electro-mechanical console incorporates a blood/crystalloid pump, temperature controllable water circulation system, pressure and temperature monitors, a sensor interface with the disposables, an arrest agent pump, an additive pump and ultra-sonic air detection sensors. The system monitors and controls the blood-crystalloid ratio, drug concentration, flow rate, pressure, temperature, and delivery route of the cardioplegia solution delivered to the patient. The system is a software-controlled system with a graphical user interface controller. The controller is utilized to initiate/stop cardioplegia delivery, monitor delivery parameters and view/save relevant case information and data.
A61M 1/36 - Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
22 - Rope, netting, tents, awnings, sails and sacks; padding and stuffing materials
Goods & Services
A securing device, namely, a flat band having a loop for capturing and locking with teeth on the edge of the band for securing medial devices and equipment, namely, tubing, blood lines, hoses, cords, cables, and video lines A securing device, namely, a flat plastic band having a loop for capturing and locking with teeth on the edge of the band
Medical device; namely, a check valve for use in extracorporeal blood perfusion circuits such as the cardiopulmonary bypass circuit used to support patients during open heart surgery.
medical device; namely, a check valve for use in extracorporeal blood perfusion circuits such as the cardiopulmonary bypass circuit used to support patients during open heart surgery
The present invention is an injection port with an articulated stopcock allowing a syringe to be connected to an IV line and, depending upon the orientation of the stopcock, allow (1) bidirectional flow of fluid through the stopcock into the IV line, (2) no flow or (3) unidirectional flow of fluid through the stopcock and into or out of the IV line. The invention is particularly useful for using a syringe for aspirating an IV line and then injecting a medicine from the syringe into the IV line. Once a syringe is connected, the invention allows one-handed manipulation of the articulated stopcock into the three orientations by simply moving the connected syringe into one of the three orientations, thereby eliminating the need for using two hands—one to operate the syringe and the other to operate the handle.
A gangable injection port holder including a series of receptacles for receiving swabable access valves that are themselves serially ganged together by tubing or complementary Luer slip connections. The receptacles are integrally formed onto a base with a side wall to allow the swabable access valves during use to be oriented vertically resting on the base or horizontally resting on the side wall. The base may be segmented, with each segment containing at least one of the receptacles. The segments may be easily snapped together in order to quickly assemble the desired number of receptacles intended to be used during a surgical procedure.
A microplegia console for controlling the delivery of cardioplegia to a patient, comprising an integrated display/touch screen for displaying cardioplegia information and patient information and allowing inputting of parameters via the display/touch screen into the console for computer-controlled perfusion of cardioplegia into the patient. The invention further comprises a method for delivery of cardioplegia to a patient, including defining and selecting a protocol from a displayed list and sequencing a series of the protocols. The invention also comprises a method for cardioplegia delivery to achieve aortic valve closure. Additionally, the invention comprises a method for activating an icon whereby, upon a first selection of the icon, displaying an indicia indicating that the icon has been first selected; and upon a second selection of the icon, activating the icon.
A61M 5/172 - Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters electrical or electronic
G09B 23/28 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes for medicine
A61M 1/36 - Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
A microplegia console for controlling the delivery of cardioplegia to a patient, comprising an integrated display/touch screen for displaying cardioplegia information and patient information and allowing inputting of parameters via the display/touch screen into the console for computer-controlled perfusion of cardioplegia into the patient, a flow knob allowing manual control the cardioplegia flow rate; and an interface operatively connected between the console and a cardioplegia pump, the interface enabling intercommunication of one or more of diagnostics status, messages and periodic data updates between the console and the pump. The invention further comprises a method for delivery of cardioplegia to a patient, including defining and selecting a protocol from a displayed list, whereupon predefined parameters of the selected protocol are then used for the delivery of cardioplegia to the patient.
A61M 1/36 - Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation
A61M 5/172 - Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters electrical or electronic
A61M 19/00 - Devices for local anaesthesiaDevices for hypothermia
G16H 40/63 - ICT specially adapted for the management or administration of healthcare resources or facilitiesICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
A microplegia console for controlling the delivery of cardioplegia to a patient, comprising an integrated display/touch screen for displaying cardioplegia information and patient information and allowing inputting of parameters via the display/touch screen into the console for computer-controlled perfusion of cardioplegia into the patient, a flow knob allowing manual control the cardioplegia flow rate; and an interface operatively connected between the console and a cardioplegia pump, the interface enabling intercommunication of one or more of diagnostics status, messages and periodic data updates between the console and the pump. The invention further comprises a method for delivery of cardioplegia to a patient, including defining and selecting a protocol from a displayed list, whereupon predefined parameters of the selected protocol are then used for the delivery of cardioplegia to the patient.
The present invention is directed towards a malleable sleeve used in conjunction with a multi-lumen catheter with an expandable device, such as a balloon, incorporated into its surface, The malleable sleeve allows the catheter to be pre-formed into a shape that corresponds with the shape of the nasal passageway. The present invention also covers endoscopic surgical methods utilizing the malleable sleeve.
The present invention is directed towards an inflation system for a balloon catheter that automatically determines and outputs a balloon diameter. The present invention is also directed towards an inflation system that automatically controls the surgical procedure using the balloon diameter.
The improved balloon catheter includes a first tubular segment, which has multiple zones of differing malleability along its length. The catheter further includes a coaxially aligned hypotube formed of a malleable material, which is positioned within the lumen of the first tubular segment and extends from the distal end of the first tubular segment. In one embodiment the hypotube runs the length of the first tubular segment; while in another embodiment, the hypotube runs along only a portion of the length of the first tubular segment. A portion of the outer circumferential surface of the hypotube is permanently affixed and sealed to an inner circumferential surface of the first tubular segment in the vicinity of the distal end of the first tubular segment. The outer circumference of the distal end of the first tubular segment is gently tapered along its length so as to smoothly transition to the circumference of the hypotube. The hypotube terminates with an atraumatic tip and includes a balloon dilator affixed near the tip. An aperture near the tip of the hypotube fluidly connects the interior of the balloon with the lumen of the hypotube enabling the balloon to selectively expand and contract.
A fluid pump for medical applications. The pump includes a flexible cassette containing two pump chambers of differing volume, each chamber having a dedicated piston. The first piston pushes fluid from the first chamber to the second, and the second piston pushes fluid from the second chamber and out of the pump. Three valves are coordinated with the action of the pistons to control fluid flow into and out of the pump chambers by applying and releasing pressure to and from specific points of the flexible cassette. A control system controls the operation of the pistons and valves and directs the pistons to be advanced according to a time-varying velocity profile. The first pump chamber passively fills and then rapidly expels the collected fluid into the second chamber at low pressure. The second chamber, once filled, expels the fluid downstream at high pressure, producing a pulsatile pressure profile.
F04B 1/02 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
F04B 9/04 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
A61M 1/10 - Blood pumps; Artificial hearts; Devices for mechanical circulatory assistance, e.g. intra-aortic balloon pumps
F04B 7/00 - Piston machines or pumps characterised by having positively-driven valving
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
F04B 53/14 - Pistons, piston-rods or piston-rod connections
A self-adjusting fluid pump that includes a piston pump containing at least one piston with a pressure sensor. The fluid pump including at least one fluid-containing pump chamber within the piston pump, adjacent to said piston, wherein advancing the piston causes fluid flow from the pump chamber to a biological destination, and retracting the piston causes fluid to passively till the pump chamber. A microprocessor, senses piston pressure to calculate the rate of fluid input flow into the pump chamber for each pump cycle. If the output flow rate deviates from the input flow rate by a pre-specified value range, the microprocessor adjusts the piston pump to match the output flow rate with the input flow rate by increasing or decreasing stroke rate (piston velocity), stroke volume, or a combination of both.
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
The present invention provides a fluid pump for medical applications. The invention comprises a flexible cassette containing two pump chambers, wherein the first pump chamber is larger than the second pump chamber. The pump includes two pistons, one for each pump chamber. The first piston pushes fluid from the first chamber to the second, and the second piston pushes fluid from the second chamber downstream out of the pump. Three valves are coordinated with the action of the pistons to control fluid flow into and out of the pump chambers by applying and releasing pressure to and from specific points of the flexible cassette. A control system controls the operation of the pistons and valves and directs the pistons to be advanced according to a time-varying velocity profile. The first pump chamber passively fills and then rapidly expels the collected fluid into the second chamber at low pressure. The second chamber, once filled, expels the fluid downstream at high pressure, producing a pulsatile pressure profile downstream.
A61M 37/00 - Other apparatus for introducing media into the bodyPercutany, i.e. introducing medicines into the body by diffusion through the skin
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
The present invention provides a self-adjusting fluid pump that includes a piston pump containing at least one piston with a pressure sensor. The fluid pump also includes at least one fluid-containing pump chamber within the piston pump, adjacent to said piston, wherein advancing the piston causes fluid to flow from the pump chamber to a biological destination, and retracting the piston causes fluid to passively fill the pump chamber. A microprocessor uses data from the piston pressure sensor to calculate the rate of fluid output flow from the pump chamber for each pump cycle and compares the output flow rate to a pre-specified value range. If the output flow rate deviates from the prc-specified value range, the microprocessor adjusts the fluid output flow of the piston pump in order to bring the output flow rate within the pre-specified value range. The adjustment can be made by increasing or decreasing stroke rate (piston velocity), stroke volume, or a combination of both.
A61M 37/00 - Other apparatus for introducing media into the bodyPercutany, i.e. introducing medicines into the body by diffusion through the skin
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
The present invention is directed towards a steerable multi-lumen catheter system with a locking mechanism and a plurality of ports connected to the lumens inside the multi-lumen catheter.
The present invention is directed towards a multi-lumen catheter with an expandable device, such as a balloon, incorporated into its surface. The multi-lumen catheter also has an opening in its shaft that allows an imaging instrument to exit the shaft and view the expandable device built into its surface. The present invention also covers an endoscopic surgical method utilizing the multi-lumen catheter.
A system for delivering blood, cardioplegia solution, and other medications or fluids in a pulsatile flow pattern to a patient during cardiopulmonary bypass is disclosed. In a preferred embodiment, a pumping apparatus having at least one chamber is utilized in which a pumping action is achieved by compressing one of the chambers with a piston mechanism, while allowing the other chamber to fill with fluid via retracting its respective piston. The instantaneous flow rate of either of the chambers is determined by the speed of the piston. In a preferred embodiment, a pulsatile flow of fluid is achieved by cyclically alternating the velocity of the piston between two different speeds. A desired average flow rate and/or delivery pressure and/or constant pulse pressure is maintained by adjusting the alternating velocities at the desired frequency and duty cycle. The calculations necessary to obtain a desired average flow rate are performed by a microprocessor, which also controls the movement of the pistons.
A system for delivering blood, cardioplegia solution, and other medications or fluids in a pulsatile flow pattern to a patient during cardiopulmonary bypass is disclosed. In a preferred embodiment, a pumping apparatus having at least one chamber is utilized in which a pumping action is achieved by compressing one of the chambers with a piston mechanism, while allowing the other chamber to fill with fluid via retracting its respective piston. The instantaneous flow rate of either of the chambers is determined by the speed of the piston. In a preferred embodiment, a pulsatile flow of fluid is achieved by cyclically alternating the velocity of the piston between two different speeds. A desired average flow rate and/or delivery pressure and/or constant pulse pressure is maintained by adjusting the alternating velocities at the desired frequency and duty cycle. The calculations necessary to obtain a desired average flow rate are performed by a microprocessor, which also controls the movement of the pistons.
A system for making a precise incision and circular hole in a vessel wall, such as the aorta, that eliminates lateral side notches from the aortotomy. In one aspect, the system includes a surgical knife or lancet having a blade surrounded by a retractable shield. In one aspect, the system includes a tissue punch having a rotating circumferential edge for receiving a parabolic-shaped anvil having an anvil cutting edge. The anvil is placed through an incision made by a knife and actuated to produce a hole in the vessel wall.
MEDICAL EQUIPMENT AND PRODUCTS, NAMELY, INTRAVENOUS FLUID DELIVERY SETS comprised of tubing with injection ports and sites, AND INTRAVENOUS FLUID DELIVERY 1 CONTROLLERS; SURGICAL VASCULAR RETRACTING devices; AORTIC PUNCHES; BLOOD CLOTTING TIME TESTING SYSTEMS comprised of testing unit and tubes; INTRAUTERINE PRESSURE MONITORING devices; CARDIOPLEGIA DELIVERY AND CONTROL SYSTEMS, namely, CANNULAES, PERFUSION SETS, AS WELL AS CARDIOPLEGIA PUMPS AND MONITORS; AND INFLATION DEVICES FOR BALLOON CATHETERS
