Surgery – Diagnostic testing
Reexamination Certificate
1998-08-06
2001-03-13
Nasser, Robert (Department: 3736)
Surgery
Diagnostic testing
C600S301000, C128S903000
Reexamination Certificate
active
06200264
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an ambulatory data recorder, and in particular to such a device having enhanced infrared data transfer. The device features an infrared transmitter port having a multi-plane lens; the port, lens and recorder enclosure working together to permit a reliable infrared data link to be established between the recorder and a line voltage device even while the recorder is in a variety of positions.
Ambulatory recording and recorders are widely used. Such devices include the Digitrapper Mk III™ ambulatory recorder (shown in FIGS. A and B) from Synectics Medical AB, the GastroScan II™ from Medical Instruments Corporation, and the SuperLogger™ from Sandhill Scientific. These types of devices make it possible for patients to remain at home, or at the least be ambulant in a hospital setting while physiological data is recorded. Typically the devices comprise a lightweight recorder in which the desired physiological data signals are temporarily stored and later downloaded for future analysis.
Many types of physiological data may be recorded, including ECG (Electrocardiogram) data, EEG data (Electroencephalogram) and pH or pressure data (Motility) in the gastrointestinal tract. Preferably such a recorder should be able to record among a programmable number of channels at a variety of programmable frequencies.
Ambulatory devices record data for future transfer to non ambulatory devices. In the past data was typically transmitted over a wire, such as a cable. One problem with such transfer is patient safety. If the recorder couples to a device drawing line voltage, then the recorder must be isolated to ensure patient safety. Isolation, of course, is expensive to provide and adds greater device complexity.
Thus there is a need to provide data transfer between an ambulatory recorder and a device drawing line voltage which avoids the expense and complexity of device isolation.
Other methods of transferring data may be used, such as infrared. To date these methods and in particular infrared, however, have not been satisfactory. Infrared data communications, however, have been difficult to implement in an ambulatory medical device due to the many and various ways such devices are used. That is, ambulatory devices may need to have data transferred while being worn by the patient, as well as when simply standing alone. During each of these circumstances, however, the device may be in many different positions, including vertical or horizontal or any combination thereof.
SUMMARY OF THE INVENTION
An ambulatory data recorder with enhanced infrared data transfer is described. In particular, the device features an infrared transmitter port having a multi-plane lens. The port, lens and recorder enclosure work together to permit a reliable infrared data link to be established between the recorder and a line voltage device even while the recorder is in a variety of positions. That is, the infrared data link may be established when the device is worn, or when the device is placed on a table in a variety of positions.
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Satherley Richard J.
Williams Malcolm G. S.
Jaro Michael J.
Medtronic Inc.
Nasser Robert
Patton Harold
Woods Thomas F.
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