1. A method for accessing interactive programming, comprising:
receiving a signal having a program, an interactive program, and an access trigger therein;
presenting the program and the access trigger on a presentation device;
receiving selection of the access trigger;
loading the interactive program in response to selection of the access trigger;
continuing presentation of the program during the loading of the interactive program; and
changing from presentation of the program to presentation of the interactive program in response to completion of the loading of the interactive program.
2. The method of claim 1, further comprising:
receiving the access trigger during presentation of the program; and
presenting the access trigger on the presentation device concurrently with presentation of the program.
3. The method of claim 2, further comprising:
ending presentation of the access trigger after a time period;
generating an access trigger invitation from the access trigger, the access trigger invitation corresponding to the access trigger; and
storing the generated access trigger invitation into a memory.
4. The method of claim 3, further comprising:
presenting the access trigger invitation on the presentation device, and in response to receiving selection of the access trigger invitation;
loading the interactive program;
continuing presentation of the program during the loading of the interactive program;
changing from presentation of the program to presentation of the interactive program in response to completion of the loading of the interactive program.
5. The method of claim 3, further comprising:
maintaining activation of the access trigger invitation until a current channel is changed to another channel.
6. The method of claim 3, further comprising:
maintaining activation of the access trigger invitation until an interruption trigger is received.
7. The method of claim 3, further comprising:
maintaining activation of the access trigger invitation until a second access trigger invitation is received.
8. The method of claim 3, further comprising:
maintaining activation of the access trigger invitation until the access trigger invitation is selected.
9. The method of claim 1, further comprising:
receiving a second access trigger corresponding to the interactive program;
generating a second access trigger invitation, the second access trigger invitation corresponding to the second access trigger; and
storing the generated access trigger invitation into a memory.
10. The method of claim 1, further comprising:
deleting the first access trigger invitation.
11. The method of claim 1 wherein receiving the signal comprises:
receiving a second interactive program and a second access trigger in the signal; and
presenting the program and the second access trigger on the presentation device.
12. The method of claim 11, where in response to selection of the second access trigger, comprising:
loading the second interactive program;
continuing presentation of the program during the loading of the second interactive program; and
changing from presentation of the program to presentation of the second interactive program in response to completion of the loading of the second interactive program.
13. The method of claim 11, further comprising:
ending presentation of the second access trigger after a time period;
generating a second access trigger invitation from the second access trigger, the second access trigger invitation corresponding to the second access trigger; and
storing the generated second access trigger invitation into a memory.
14. The method of claim 13, further comprising:
presenting the second access trigger invitation on the presentation device, and in response to receiving selection of the second access trigger invitation;
loading a second interactive program;
continuing presentation of the program during the loading of the second interactive program; and
changing from presentation of the program to presentation of the second interactive program in response to completion of the loading of the second interactive program.
15. The method of claim 12, further comprising:
changing from presentation of the program to presentation of the interactive program in response to selection of the first access trigger invitation; and
changing from presentation of the program to presentation of the second interactive program in response to selection of the second access trigger invitation.
16. The method of claim 1, further comprising:
storing the program during presentation of the interactive program; and
presenting the stored program after presentation of the interactive program.
17. A system which accesses interactive programming, comprising:
a tuner operable to receive a signal having a program, an interactive program, and an access trigger therein;
a processing system communicatively coupled to the tuner and operable to process the received program and the access trigger into a signal for presentation of the program and the access trigger on a presentation device; and
a user interface device communicatively coupled to the processing system and operable to communicate a selection of the access trigger by a user to the processing system, where in response to communicating the selection of the access trigger to the processing system, the processing system loads the interactive program, continues presentation of the program during the loading of the interactive program, and changes from presentation of the program to presentation of the interactive program in response to completion of the loading of the interactive program.
18. The system of claim 17, further comprising:
a memory operable to store an access trigger invitation corresponding to the access trigger, where in response to selection of the access trigger invitation, the processing system loads the interactive program, continues presentation of the program during the loading of the interactive program, and changes from presentation of the program to presentation of the interactive program in response to completion of the loading of the interactive program.
19. The system of claim 18 wherein the user interface device comprises:
a hand held remote operable to select the access trigger.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A dialysis fluid heating system comprising:
a dialysis fluid heater;
a dialysis fluid carrying element in operable communication with the dialysis fluid heater to heat a dialysis fluid; and
a logic implementer configured to control the heater using
(i) a first heater input determined using a first feedforward determination at a first time from a first dialysis fluid temperature delta and a first dialysis fluid flowrate,
(ii) a feedback adjustment of a second dialysis fluid temperature delta using a measured dialysis fluid outlet temperature and at least two of a proportional gain, integral gain and derivative gain; and
(iii) a second heater input determined using a second feedforward determination at a second time from the second dialysis fluid temperature delta and a second dialysis fluid flowrate.
2. The dialysis fluid heating system of claim 1, wherein the dialysis fluid heater is a resistance heater or an induction heater.
3. The dialysis fluid heating system of claim 1, wherein the dialysis fluid carrying element is one of: (i) a disposable heating pathway disposed separately from a disposable pumping cassette; (ii) a dialysis fluid heating pathway provided as part of the disposable pumping cassette; and (iii) a warmer bag.
4. The dialysis fluid heating system of claim 1, which includes at least one temperature sensor configured to measure the dialysis fluid outlet temperature and output an indicative signal to the logic implementer.
5. The dialysis fluid heating system of claim 4, wherein the temperature sensor is of a type selected from the group consisting of: (i) an infrared temperature sensor, (ii) a thermistor, and (iii) a resistance temperature device (\u201cRTD\u201d), (iv) diode and (v) integrated circuit.
6. The dialysis fluid heating system of claim 1, which includes a table relating heater inputs to temperature deltas and dialysis fluid flowrates, the logic implementer finding an appropriate heater input from the table.
7. The dialysis fluid heating system of claim 6, wherein the table is formed empirically.
8. The dialysis fluid heating system of claim 1, wherein the first heater input is at least one of (i) a power input and (ii) a power supply input, which powers the heater accordingly.
9. The dialysis fluid heating system of claim 1, wherein the first heater input is determined using an algorithm relating the first dialysis fluid temperature delta and the first dialysis fluid flowrate.
10. The dialysis fluid heating system of claim 1, wherein the logic implementer is configured to adjust the second dialysis fluid temperature delta by applying each of the proportional gain, integral gain and derivative gain.
11. The dialysis fluid heating system of claim 1, wherein the first dialysis fluid temperature delta is based on at least one of: (i) a desired dialysis fluid outlet temperature and a measured dialysis fluid inlet temperature; and (ii) the desired dialysis fluid outlet temperature, the measured dialysis fluid inlet temperature and the measured dialysis fluid outlet temperature.
12. The dialysis fluid heating system of claim 1, wherein the adjustment using the measured dialysis fluid outlet temperature includes a feedback algorithm applied to a summation of a desired dialysis fluid outlet temperature and the measured dialysis fluid outlet temperature.
13. The dialysis fluid heating system of claim 1, wherein the logic implementer is configured to adjust at least one of: (i) the measured dialysis fluid outlet temperature based on a rate of change of a temperature sensor output; and (ii) the dialysis fluid flowrate based on a real time determination of a flowrate.
14. A dialysis fluid heating system comprising:
a dialysis fluid heater;
a dialysis fluid carrying element in operable communication with the dialysis fluid heater to heat a dialysis fluid; and
a logic implementer configured to control the heater using
(i) a first heater input determined using a first feedforward determination at a first time from (a) a first dialysis fluid temperature delta relating a desired dialysis fluid outlet temperature and a measured dialysis fluid inlet temperature and (b) a dialysis fluid flowrate, and
(ii) a feedback adjustment using a feedback algorithm applied to a second dialysis fluid temperature delta relating the desired dialysis fluid outlet temperature and a measured dialysis fluid outlet temperature, wherein the feedback adjusted second dialysis fluid temperature delta is used to determine using a second feedforward determination at a second time a second heater input.
15. The dialysis fluid heating system of claim 14, which includes a power supply operable to power the dialysis fluid heater, the first and second heater inputs directed to the power supply, which powers the heater accordingly.
16. The dialysis fluid heating system of claim 14, the logic implementer configured to make the first and second feedforward determinations using a table or an algorithm.
17. The dialysis fluid heating system of claim 14, further comprising:
a primary inductor coil;
a susceptor induced by the primary coil to heat a dialysis fluid;
a sensor positioned to measure an electrical property of one of the susceptor and the primary inductive coil, wherein
the logic implementer configured to determine a resistance of the susceptor from the measured electrical property, and relate the determined resistance to a temperature of the susceptor.
18. The dialysis fluid heating system of claim 17, wherein the logic implementer is configured to determine the resistance of the susceptor via (i) contact between the susceptor and an electrical circuit that applies one of a voltage and a current to the susceptor, the other of the voltage and the current being the measured electrical property; (ii) measuring a voltage and current applied to the primary inductive coil; and (iii) measuring a decay in oscillations of the property in a resonant mode due to the resistance of the susceptor.
19. The dialysis fluid heating system of claim 17, the logic implementer configured to relate the determined resistance to the temperature of the susceptor using (i) a calibration of a resistance determined when the temperature of the susceptor is known;
and (ii) a known temperature delta to a resistance delta relationship for the susceptor.
20. The dialysis fluid heating system of claim 19, the logic implementer further configured to use the temperature of the susceptor for at least one of (i) control of power to the primary inductive coil; (ii) detection of air in a fluid carrying element operable with the susceptor, and (iii) detection of fluid flow changes or stops.