Sensor interface system
A sensor interface system for providing a connection between at least one sensor and a maternal-fetal monitor, wherein the interface system converts electrical muscle activity captured by the sensor(s) into uterine activity data signals for use by the maternal-fetal monitor. The sensor interface system of the invention preferably includes a conversion means for converting the signals from the sensor(s) into signals similar to those produced by a tocodynamometer.
1. A method for converting physiological signals into signals that provide inputs to a maternal-fetal monitor, the method comprising:
detecting physiological signals via a sensor array dimensioned to attach to a maternal abdomen, wherein the sensor array comprises a plurality of electrodes;
receiving the detected physiological signals from an electrode interface of a first component, wherein the electrode interface is configured to operably and removeably connect with the sensor array, wherein the physiological signals are received via a wireless signal transmitter of the first component associated with the electrode interface,
wirelessly transmitting the received physiological signals to a wireless receiver of a second component located remote from the first component, wherein the second component comprises:
the wireless signal receiver configured to receive the physiological signals transmitted by the wireless signal transmitter;
a signal converter configured to receive the physiological signals from the wireless signal receiver and to process the physiological signals into output data that mimics electrical output from at least one of the tocodynamometer, the intrauterine pressure catheter, or the fetal scalp electrode; and
a maternal-fetal monitor port interface configured to operably and removably connect to a port of the maternal-fetal monitor, wherein the maternal-fetal monitor port interface is configured to receive the output data from the signal converter and to communicate to the maternal-fetal monitor the output data when the maternal-fetal monitor port interface is connected to the port of the maternal-fetal monitor.
2. The method of claim 1 , wherein detecting physiological signals comprises detecting at least one of an electrocardiography signal or an electromyography signal.
3. The method of claim 1 , wherein the first component further comprises an analog-to-digital converter, and wherein the method further comprises:
receiving the physiological signals as analog physiological signals at the analog-to-digital converter; and
converting the analog physiological signals into digital physiological signals via the analog-to-digital converter.
4. The method of claim 3 , wherein wirelessly transmitting the received physiological signals comprises wirelessly transmitting the digital physiological signals.
5. The method of claim 4 , wherein the wireless signal receiver s further configured to receive the digital physiological signals and the signal converter is further configured to process the digital physiological signals into the output data.
6. The method of claim 5 , wherein the signal converter is further configured to perform a digital-to-analog conversion of the digital physiological signals to generate the output.
7. The method of claim 1 , wherein wirelessly transmitting the received physiological signals comprises wirelessly transmitting analog physiological signals.
8. The method of claim 1 , wherein the signal converter comprises an analog-to-digital converter and a programmable device, wherein the analog-to-digital converter is configured to receive the analog physiological signals from the wireless signal receiver and to convert the analog physiological signals into digital physiological signals, and wherein the programmable device is configured to process the digital physiological signals and determine a voltage level for mimicking the electrical output from the at least one of the tocodynamometer, the intrauterine pressure catheter, or the fetal scalp electrode.
9. The method of claim 8 , wherein the signal converter further comprises a digital-to-analog converter configured to receive the voltage level and to convert the voltage level into second analog physiological signals.
10. The method of claim 1 , wherein the signal converter further comprises a memory configured to store the output data, wherein the signal converter is further configured to transmit on a non-continuous basis the output data stored in the memory to the maternal-fetal monitor via the maternal-fetal monitor port interface.