Class / Patent application number | Description | Number of patent applications / Date published |
600487000 | Pressure indicator includes liquid column | 9 |
20120172732 | Lumen Based Pressure Sensing Guidewire System with Distortion Correction - A guidewire is disclosed that is constructed using tubular members that create a hollow lumen that runs from the proximal end of the guidewire to a window towards the distal end of the wire. This internal lumen is filled with a fluid that allows pressure exerted at the window to exert pressure at the proximal end of the guide wire proportional to the pressure exerted at the window. This pressure exerted at the proximal end of the guidewire is measured using a pressure transducer external of the guidewire. The pressure transducer converts the measured pressure into an electrical signal that is proportional to the pressure at the window. The electrical signal is manipulated to correct for errors that are due to the pressure signal traveling though the inner lumen of the guidewire to ensure the electrical signal matches the pressure exerted at the window. | 07-05-2012 |
20130023776 | MONITORING A PROPERTY OF THE CARDIOVASCULAR SYSTEM OF A SUBJECT - A device is configured to monitor a cardiovascular property of a subject. The device obtains measurement data from a primary pressure wave sensor arranged to detect pressure waves in an extracorporeal fluid circuit in fluid communication with the cardiovascular system of the subject. The device has a signal processor configured to generate a time-dependent monitoring signal based on the measurement data, such that the monitoring signal comprises a sequence of heart pulses, wherein each heart pulse represents a pressure wave originating from a heart beat in the subject; determine beat classification data for each heart pulse in the monitoring signal; and calculate, based at least partly on the beat classification data, a parameter value indicative of the cardiovascular property. The beat classification data may distinguish between heart pulses originating from normal heart beats and heart pulses originating from ectopic heart beats. The cardiovascular property may be an arterial status of the cardiovascular system, a degree of calcification in the cardiovascular system, a status of a blood vessel access used for connecting the extracorporeal fluid circuit to the cardiovascular system, a heart rate variability, a heart rate, a heart rate turbulence, an ectopic beat count, or an origin of ectopic beats. The device may be attached to or part of a dialysis machine. | 01-24-2013 |
20140052009 | MONITORING BLOOD PRESSURE IN A MEDICAL INJECTION SYSTEM - A pressure sensor, for example, employed by a medical injection system for monitoring blood pressure, is isolated from relatively high pressures by a volume of a compressible medium, preferably air, or other suitable gas. The volume fills an entirety of a cavity of a pressure transducer assembly, and is enclosed between a pressure transmission interface of the assembly and the pressure sensor. The pressure transducer assembly is integrated into a fluid circuit such that the pressure transmission interface is exposed to flow through the fluid circuit. The cavity of the assembly has a configuration that allows transmission of a patient's blood pressure from the fluid circuit, via the interface and gas volume, to the pressure sensor, yet prevents transmission of the relatively high pressures, for example, injection pressures. The pressure transducer assembly may be part of a disposable fluid circuit subassembly, for example, packaged as a kit. | 02-20-2014 |
20140058277 | BLOOD FLOW RATE MEASUREMENT SYSTEM - The present invention discloses a heat exchanging assembly with a body adaptable to a catheter for measuring blood flow rate with a supply system for providing the heat exchanging medium to the heat exchanging assembly at a constant temperature and constant flow rate. The heat exchanging assembly comprises a heat exchanging element, a plurality of temperature sensors, a sensor lumen and an inflation lumen. | 02-27-2014 |
20150018696 | DISPOSABLE BLOOD PRESSURE TRANSDUCER AND MONITOR INTERFACE - A medical blood pressure transducer that provides an identifier to a monitor that conveys characteristics of the transducer. The monitor can use the information to decide whether to function, or in calibration of the system. The transducer may be part of a disposable blood pressure monitoring system, and may include two transducers closely-spaced to provide two separate but identical outputs. In this way, the transducer may be connected to both a patient monitor and a cardiac output monitor at the same time measurements from a single line can be simultaneously supplied to two separate monitoring devices (for example a patient monitor and a cardiac output monitor). The identifier for the transducer may be circuitry, specifically a resistance/capacitance (RC) combination that possesses a characteristic time constant. | 01-15-2015 |
20150126880 | METHOD AND DEVICE FOR MONITORING BLOOD PRESSURE MEASUREMENT BY ARTERIAL CATHETERIZATION OF A PATIENT - A method is disclosed for continuously monitoring a blood pressure measurement using a sensor connected by a hydraulic link to an arterial catheter, the method includes determining the dynamic parameters of the link, analyzing the frequency content of the incident signal, detecting one of the following situations: (a) ability of the link to transmit the incident signal with a distortion below a threshold, (b) ability of the link to transmit the incident signal with a distortion above the threshold and possibility of correcting the measured signal, (c) inability of the link to transmit the incident signal with a distortion below the threshold and impossibility of correcting the measured signal, periodic application of a mechanical action to the tubing providing the hydraulic link. | 05-07-2015 |
20150359445 | PRESSURE-SENSING GUIDEWIRE AND SHEATH - A pressure sensing device is provided that can monitor and measure pressure at two points in a vessel or artery without moving the outer sheath or catheter of the device. The outer sheath or catheter includes two spaced apart openings that may be positioned in a vessel or artery on opposing sides of an occlusion. The device also includes an inner elongated tube with at least one opening. The inner elongated tube is slidable with respect to the outer sheath or catheter thereby permitting the opening of the elongated tube to be moved into selective registration with one of the openings of the outer sheath. A pressure measurement may be taken through one of the openings in the outer sheath by aligning the opening of the elongated tube with said opening and, then, a second pressure reading may be taken by sliding the elongated tube within the outer sheath so that the opening of the elongated tube is in registry with the other opening of the tubular sheath. As a result, pressure measurements at two points in a vessel or artery may be taken without moving the outer sheath or catheter. | 12-17-2015 |
20160106323 | CARDIAC FUNCTION EVALUATION SYSTEM - A device adapted for determining cardiac viability, wherein said device includes: a cannula having a hollow body and at least a distal end adapted for insertion into a heart and operator end for adapted for an operator to position the catheter in the ventricular apex and adapted for connection to a plumbing system; an inflatable balloon positioned near to the distal end in fluid communication with the hollow body to allow for selected inflation of the balloon, a controller adapted to calculate the viability of the heart from pressure data detected within cannula or balloon which is inflated to various degrees with an incompressible fluid. | 04-21-2016 |
20180020935 | INTRAVENOUS ACCESS DEVICE DETECTING INTRAVENOUS INFILTRATION AND IN-VEIN PLACEMENT | 01-25-2018 |