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Programming Terms
Programming Terminology -F
| Term | Definition |
|---|---|
| Alternating Current (AC) | Current that reverses direction periodically. |
| Ampere | Measurement for current. |
| Amplitude Range | The percentage of amplitude control, relative to Therapy Amplitude, allowed for patient adjustment. Each Area of a Multi-Area program can have its own Amplitude Range parameter. |
| Anode | Positively charged electrode. |
| Area (Stimulation Area) | Refers to a combination (set) of parameters that make up a stimulation pulse. |
| Bilateral Threshold | The level the patient perceives stimulation sensations on both sides of the body. |
| Biphasic | Reverse electrode polarity on each and every stimulation pulse. |
| Bipole | Anode and cathode combination. |
| Burst | Waveform achieved by repeatedly delivering a group of closely spaced pulses (packet of stimulation or pulse train) followed by a quiescent time. |
| Cathode | A negatively charged electrode. |
| Charge per pulse | Strength of the pulse (Amplitude X PW) |
| Charge per Second (Dose) | Amplitude X PW X Rate |
| Circuit | Flow of electrical current from a negative pole to a positive pole, through a conductor. |
| Constant Current IPG | Power source that adjusts current in response to resistance (impedance) to ensure that a consistent level current is delivered to the patient. Also known as current controlled. |
| Constant Voltage (IPG) | Power source that does not adjust voltage in response to resistance (impedance). The current delivered to the patient will vary in response to changes in impedance. Also known as voltage controlled. |
| Contact | Another term for electrode. |
| Coverage | Area of paresthesia. |
| Current | Measurement of the flow of a charged particles through a circuit. |
| Current Amplitude | (Amplitude X PW) |
| Direct Current (DC) | Current flowing in one direction. |
| Discomfort Threshold (DT) | The level at which stimulation is perceived as unpleasant. This is labeled as Maximum Amplitude on the Nalu Clinician Programmer screen. |
| Dose (Charge per Second) | Amplitude X PW X Rate |
| Dosing | One to four Programs delivered in doses with specified ON and OFF times in milliseconds. The programs can include up to four Areas. |
| Duty Cycle | Percent of time stimulation is on during a pulse pattern (PW X Rate). |
| Electrode Array | The combination of activated electrodes on the leads. |
| Frequency Rate (Rate) | The number of stimulation pulses delivered per second as measured in hertz (Hz). |
| Guarded Electrode Array | Anodes are configured on both sides of a cathode to focus the field directly under cathode. The anodes hyperpolarize the area around the cathode and thus act as a boundary for the stimulation field. |
| Hertz (Hz) | A unit of measurement for frequency equal to one cycle per second. |
| Impedance | Resistance by an object to the flow of electrical current in an AC circuit. |
| Maximum Amplitude | Amplitude setting on the Nalu Clinician Programmer screen for the discomfort threshold. |
| Microamp (µA) | Unit of measure for electrical current equal to one millionth of an ampere as used on the Nalu Clinician Programmer when setting step size where 40 µA = 0.04 mA, 120 µA = 0.12 mA and 400 µA = 0.4 mA. |
| Microburst Waveform | A HF Tonic waveform that includes Dosage in the millisecond scale (for example 1kHz dosed at 10ms on and 15ms off). |
| Microsecond (µs) | Unit of time used to measure pulse width equal to one millionth of a second. |
| Milliamp (mA) | Unit of measure for electrical current equal to one thousandth of an ampere. |
| Milliseconds (ms) | Unit of time equal to one thousandth of a second. |
| Mode | A specific method of delivery of stimulation. |
| Multi Area Programs | Multiple areas delivered simultaneously. |
| Multiple Independent Current Control (MICC) | Provides individual current control at the electrode level for greater specificity in directing the stimulation field and overcoming impedance variability. MICS systems are constant current. |
| Ohm (Ω) | Refers to the unit of measurement for resistance and impedance. |
| Ohm’s Law | Relationship between voltage, current and resistance as expressed: current = voltage X resistance. |
| Open Circuit | Circuit that is open or broken at one or more points, which results in the interruption of the flow of current past the breakage. |
| Pairing | Program with 2 to 4 areas consisting of a different wave forms in attempt to elicit (excite) different MOAs. The different areas are sequentially delivered. |
| Parameter | Electrical settings that can be adjusted to alter the characteristics of a stimulation pulse. |
| Paresthesia | Tingling sensation that results from activation of sensory fibers in the dorsal columns which can help mask the presence of pain. |
| Paresthesia Free (Paresthesia Independent) | The stimulation current is below the perception threshold and therefore insufficient to activate the sensory nerve fibers that generate paresthesia. |
| Patient Selectable Programs | Allows manual selection of preset programs to enable the patient to choose the program that best matches their pain level, pain location or activity level. |
| Perception Threshold (PT) | The level where stimulation sensations are first perceived. Nalu terms this as Threshold Amplitude. |
| Polarity | The electrical charge of an object, either positive or negative. |
| Program | A stimulation configuration consisting of up to four stimulation Areas. |
| Pulse | Refers to a single surge of current or voltage. |
| Pulse Width (PW) | The time duration of each electrical pulse. |
| Rate (Frequency) | The number of stimulation pulses delivered per second as measured in hertz (Hz). |
| Resistance | Resistance by an object to the flow of electrical current in a DC current. |
| Schedule | Configuration of programs and OFF periods that are automatically cycled, either randomly or in sequence, at defined time intervals. |
| Segmental Stimulation | Refers to unpleasant stimulation sensations such as a band of tightness around the chest and abdominal presumably due to DR fiber activation. |
| Short Circuit | An electrical pathway in which current flows around, rather than through a circuit. |
| Stimulation Area | Refers to a combination (set) of parameters that make up a stimulation pulse. |
| Stimulation Parameters | Electrode polarity, amplitude, pulse width, frequency adjusted to shape the field of stimulation and fine tune the stimulation pulse. |
| Stimulation Pulse | Surge or pulse of electrical current. |
| Subperception | The stimulation current below the perception threshold and therefore insufficient to activate the sensory nerve fibers that generate paresthesia sensations. |
| Sweet Spot | The area of the spinal cord that elicits the desired paresthesia coverage over the painful areas. |
| Therapy Amplitude | The level at which stimulation is comfortable and provides maximum therapeutic effect. |
| Threshold Amplitude | Amplitude setting on the Nalu Clinician Programmer screen for the perception threshold. |
| Usage Range (UR) | The difference between the perception and discomfort thresholds. Also known as the therapeutic window. |
| Volt (V) | Measurement for voltage. |
| Voltage | Amount of force it takes to move current between 2 points. |
| Waveform | A pattern of stimulation |
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