| TRANSOMA MEDICAL, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20090275848 | Cardiac Risk Assessment - In a system for assessing cardiac risk of a patient, a measuring component measures a cardiac signal comprised of multiple cardiac cycles at multiple periods in time. A processing component calculates sensitivity of cardiac function to sympathetic drive at each of the periods in time from the measured cardiac signal. A risk identification component evaluates a trend of the sensitivity over time as an indicator of a degree of cardiac risk. | 11-05-2009 |
| 20090156908 | Deriving Patient Activity Information from Sensed Body Electrical Information - Electrodes of a subcutaneous monitoring system receive body electrical signals that indicate both cardiac and non-cardiac muscle activity. In general, non-cardiac muscle activity is often correlated with physical activity, and physical activity is typically a strong indicator of patient health. Exemplary systems and methods that detect non-cardiac muscle activity information in sensed body electrical waveforms may provide a diagnostic tool for monitoring physical activity level over time in patients that have subcutaneous monitoring systems. In an illustrative embodiment, systems and methods for presenting patient activity information in a graphical format over intervals of time include processing ECG waveform information to identify and to accumulate non-cardiac muscular activity information during each of the intervals of time. In various implementations, number, intensity, and/or duration of the events that are identified during a time interval may be accumulated and stored for subsequent recall. | 06-18-2009 |
| 20090143692 | Physiologic Signal Processing To Determine A Cardiac Condition - In a method for determining a cardiac condition, a sensed physiologic signal for a period of time including multiple cardiac cycles is received. Using the received physiologic data, a heart beat frequency to be used as a reference frequency is determined. A plurality of harmonics of the received physiologic signal is extracted based on the reference frequency, wherein the harmonics correspond to a plurality of alternans frequencies. Amplitudes of at least some of the extracted harmonics are determined, and are used to determine an alternans indicator value. | 06-04-2009 |
| 20090118626 | Calculating Respiration Parameters Using Impedance Plethysmography - A method of determining a value for a respiration parameter in a test subject can include capturing—using a fully implanted system that includes a wireless transmitter and at least a first lead wire having a first electrode disposed thereon and a second lead wire having a second electrode disposed thereon—information indicative of an impedance measure between the first and second electrodes and across a thoracic region of the test subject; wirelessly transmitting, from the implanted system and to external equipment, the captured information; and determining a respiration parameter of the test subject based on the captured information. The at least first and second lead wires can be positioned in the test subject subcutaneously and external of any cranial, thoracic, abdominal and pelvic cavities of the test subject | 05-07-2009 |
| 20090110131 | Assessing Noise on a Communication Channel - A system and method involve transceiving successive first and second synchronization signals defining endpoints of a frame. A digital signal is transceived by a modulating time interval between portions of the first and second synchronization signals. A first data pulse is transceived during the frame. A relative position in the frame of the first data pulse represents a first analog signal. | 04-30-2009 |
| 20090030397 | BARRIERS AND METHODS FOR PRESSURE MEASUREMENT CATHETERS - Methods and apparatus of the present invention provide viscoelastic barrier materials for use as barriers in devices such as pressure measurement catheters. Improved barrier materials sometimes include at least one barrier material precursor combined with an amount of a softener. In other embodiments, two barrier material precursor components are combined without a softener to provide a fully cross-linked barrier material having certain softness characteristics. In various embodiments, a softener may be dimethyl silicone oil and may be combined with a barrier material precursor in an amount of between about 25% and about 45% by weight, relative to the final barrier material. Once a viscoelastic barrier material is prepared, it may be placed in a pressure transmission catheter or similar device, for example by injecting the gel into a lumen of the catheter via a syringe. Barrier materials of the present invention have one or more advantageous properties, such as a desired softness, full cross-linking, resistance to washout from a catheter, enhanced stability and/or the like. | 01-29-2009 |
| 20080275312 | Cross-Band Communications in an Implantable Device - An ambulatory monitoring device includes a sensor to monitor a physiological signal and a battery power source. The device also includes a wireless receiver adapted to monitor a first frequency band having frequencies below 1 MHz and configured to detect and receive, using less than 10 micro-amps of current from the battery power source when operating, wireless communications within the first frequency band from a remote device at least one meter away. The device further includes a wireless transmitter adapted to transmit—after receipt from the remote device of a first wireless communication within the first frequency band that includes an invitation for further communication—a second wireless communication in a second frequency band having frequencies above 10 MHz, the second wireless communication comprising data indicative of the physiological signal as sensed by the sensor. | 11-06-2008 |
