Methods, apparatus, and systems to non-invasively determine intra-luminal placement and patency of a vascular access device. In one form, our device itself remains non-invasive, connecting at the vascular access device's hub outside the patient's body. Patency and/or placement are estimated indirectly by measuring a physiological parameter which is indicative of proper patency and/or placement of the vascular access device in a patient. The measurement is compared to a reference value or calibration. If the comparison indicates indication of proper patency and/or placement, a signal is generated. The signal can be used in a number of ways. One example is to give a user-perceivable alarm or indication of proper patency and/or placement. Non-limiting examples include activating a light, an audible buzzer, a vibration, readable displayed text or graphics, or some combination of the same. The user can then have an indirect and at least semi-automatic way of estimating proper patency and/or placement of a vascular access device. In one aspect of the invention, the technique is able to achieve this end by monitoring and detecting changes in the physiological parameter of systemic vascular pressure via pressure measurement in, at, or near the hub or other portion of a vascular access device that has a lumen placed intra-luminally, and then using the results of that monitoring to indirectly transduce conditions or states indicative of either good placement/patency or bad placement/patency of the vascular access device.

Disclosed are an electrocardiogram monitoring device (100) and an electrocardiogram monitoring system. The electrocardiogram monitoring device (100) comprises: a main body (10) and a bottom support, wherein the main body (10) is worn on a wrist, the main body (10) is provided with a controller and a first monitor (11) electrically connected to the controller, and the first monitor (11) is used for generating electrocardiosignals when abutting against two hands and sending the electrocardiosignals to the controller; and the bottom support is provided with a second monitor, the second monitor is in signal connection with the controller, and the second monitor is used for generating electrocardiosignals when being attached to the chest or a limb and sending the electrocardiosignals to the controller. The electrocardiogram monitoring device (100) may realize diverse detection and is easy to operate.

An addition of auxiliary functions to the multimedia equipment not included inside. These functions can be function of physiological data processing, extended and/or uninterrupted operations with regard to monitored and processed data. Auxiliary functions are implemented by the auxiliary equipment and circuits solutions physically placed in the original equipment or out of it but mechanically and electrically connected by it, whereas can it formed one compact unit. The parts, which are necessary to be during operation changed to get uninterrupted functions, are user friendly and simply exchangeable from the aspects of users.

A medical monitoring and treatment device that includes a therapy delivery interface, a plurality of therapy electrodes coupled to the therapy delivery interface, a plurality of electrocardiogram sensing electrodes to sense electrocardiogram signals of a patient, a sensor interface to receive the electrocardiogram signals and digitize the electrocardiogram signals, and at least one processor coupled to the sensor interface and the therapy delivery interface to analyze the digitized electrocardiogram signals, to detect a cardiac arrhythmia based on the digitized electrocardiogram signals, and to control the therapy delivery interface to apply electrical therapy to the patient based upon the detected cardiac arrhythmia. The at least one processor is further configured to analyze a frequency domain transform of the digitized electrocardiogram signals, to determine a metric indicative of a metabolic state of a heart of the patient, and to accelerate or delay application of the electrical therapy based upon the metric.

An intravascular ultrasound (IVUS) device that includes a flexible elongate member having a proximal portion and a distal portion; a controller coupled to the distal portion of the flexible elongate member; an ultrasound transducer disposed at the distal portion of the flexible elongate member and in communication with the controller; a pressure transducer disposed at the distal portion of the flexible elongate member and in communication with the controller; and plurality of conductors extending from the controller to the proximal portion of the catheter, at least one conductor of the plurality of conductors being configured to carry both the signals representing information captured by the ultrasound transducer and information captured by the pressure transducer.

Provided is a wireless electrocardiogram monitoring device comprising: a patch part including a plurality of electrodes; and a module part detachably coupled to the patch part and capable of wireless communication with an external device, wherein the patch part comprises: a downward patch part formed at the bottom surface to be attached to the human body while some of the plurality of electrodes are exposed from the bottom surface; and an upward patch part disposed at the top surface opposite to the bottom surface while the others of the plurality of electrodes are exposed from the top surface.

Electrodes for use in electroencephalographic recording, including consciousness and seizure monitoring applications, have novel features that speed, facilitate or enforce proper placement of the electrodes, including any of alignment indicators, tabs and juts, color coding, and an insulating bridge between reference and ground electrodes which ensures a safe application distance between the conductive regions of the two electrodes in the event of cardiac defibrillation. A method of using a set of at least four such electrodes is also disclosed.

A wearable medical device is provided for monitoring a cardiac condition of a patient, where the device is releasably mounted to the patient's chest and includes at least two skin-facing electrodes forming a first one or more ECG leads for ongoing monitoring of heart functioning and at least one touch electrode for intermittently obtaining additional circuit vectors for deriving additional metrics regarding the functioning of the patient's heart. Each touch electrode is configured to form an additional lead/vector that is a larger vector and/or separated by at least 15° from a corresponding first lead/vector formed from the first one or more ECG leads in a vector cardiogram representation of the first one or more ECG leads and the additional lead/vector.

One or more auscultation sensors attached to the skin of an at-least-prospectively contagiously-infected patient are connected via a corresponding associated one or more sensor cables so as to provide for one or more health care practitioners to listen to auscultation sounds from the one or more auscultation sensors from a relatively safe distance, without a need for close proximity to the patient when listening.

An electrode system includes an electrode, a connector, and a cable with an in-line radio-frequency filter module comprising resistors and inductors without any deliberately added capacitance. The resistors are arranged in an alternating series of resistors and inductors, preferably with resistors at both outer ends, and connected electrically in series. The in-line module is located at a specific location along the wire, chosen through computer modeling and real-world testing for minimum transfer of received RF energy to a patient's skin, such as between 100 cm and 150 cm from the electrode end of a 240 centimeter cable. The total resistance of the resistors plus cable, connectors and solder is 1000 ohms or less; while the total inductance is roughly 1560 nanohenries. The inductors do not include ferrite or other magnetic material and are, together with the resistors, stock components thereby simplifying manufacture and reducing cost.