Interface cable
First Claim
1. An interface method of interconnecting a patient monitoring instrument and a noninvasive sensor usable with said patient monitor to supply said patient monitor signals processable to determine one or more physiological parameters of a monitored patient, the interface method comprising the steps of:
- detecting if said sensor is valid by determining sensor identification information using at least a light emitter drive signal line disposed within a cable and an identification reader disposed within said cable;
performing an encryption handshake with said patient monitoring instrument upon valid sensor detection, said performing the encryption handshake comprising dynamically generating a private encryption key based at least partly on a public seed;
enabling normal physiological measurements processing with said patient monitoring instrument after successful completion of said encryption handshake; and
providing light emitter drive signals to the sensor using the light emitter drive signal line.
4 Assignments
0 Petitions
Accused Products
Abstract
An interface cable is configured to connect a host instrument to a physiological sensor. The interface cable has an ID signal input from the sensor and a LED drive signal input from the host instrument sensor port. The interface cable also has a data signal output to the host instrument sensor port. The LED drive signal and the data signal provide an encrypted handshake to and from the host instrument. The handshake is responsive to the ID signal so as to enable normal operation of the host instrument and the sensor.
926 Citations
24 Claims
-
1. An interface method of interconnecting a patient monitoring instrument and a noninvasive sensor usable with said patient monitor to supply said patient monitor signals processable to determine one or more physiological parameters of a monitored patient, the interface method comprising the steps of:
-
detecting if said sensor is valid by determining sensor identification information using at least a light emitter drive signal line disposed within a cable and an identification reader disposed within said cable; performing an encryption handshake with said patient monitoring instrument upon valid sensor detection, said performing the encryption handshake comprising dynamically generating a private encryption key based at least partly on a public seed; enabling normal physiological measurements processing with said patient monitoring instrument after successful completion of said encryption handshake; and providing light emitter drive signals to the sensor using the light emitter drive signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A cable enabling communication between a host patient monitoring instrument to and a noninvasive optical sensor, the cable comprising:
-
a measurement means for reading a sensor identification element using a sensor drive line, wherein the drive line is also used to drive a one or more light emitters; a verification means for determining from said measurement means that said sensor is valid and for determining a corresponding sensor identification; a handshake means for establishing said communication and for transmitting said sensor identification, said handshake means including at least a portion of an LED signal conductor, said handshake means comprising encryption means for dynamically generating an encryption key based at least partlv on a seed in response to receiving a handshaking message; and an adapter means for connecting said host patient monitoring instrument and said sensor upon establishing said communication. - View Dependent Claims (11, 12, 13)
-
-
14. A cable for providing communication between electronics of a host patient monitoring instrument and a noninvasive physiological sensor configured to be positioned proximate body tissue and configured to provide said patient monitoring instrument with signals indicative of one or more physiological parameters of a monitored patient, said cable comprising:
-
an LED drive signal line disposed within said cable, the LED drive signal line used to send LED drive signals to LEDs of a said noninvasive physiological sensor; a data signal line disposed within said cable; an identification reader disposed within said cable; and wherein prior to acquisition of measurement data, said LED drive signal line and said identification reader are also used to determine whether said a sensor is valid, and said LED drive signal line and said data signal line are used to conduct a handshake to and from said host patient monitoring instrument, said handshake responsive to said determination, wherein said handshake comprises a message operative to dynamically initiate an encryption key generation process based at least partly on a seed.
-
-
15. A cable configured to provide communication between a host patient monitoring instrument and a noninvasive physiological sensor configured to be positioned proximate body tissue and configured to provide said patient monitoring instrument with signals indicative of one or more physiological parameters of a monitored patient, said cable comprising:
-
a patient monitoring instrument port including; a patient monitoring input configured to receive sensor light emitter drive signals from a said hest patient monitoring instrument, and a patient monitoring output configured to transmit at least validation data to said patient monitoring instrument; a sensor port configured to provide communications with said noninvasive physiological sensor; and a processor configured to; determine sensor identification information from said sensor light emitter drive signals and output said validation data, and generate an encryption key dynamically based at least partly on a seed in response to receiving a signal from the patient monitoring instrument. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification