Purpose
This calculator estimates upper and lower LFP thresholds for adaptive DBS programming, based on the mean of multiple peak and trough LFP recordings sampled across the patient's symptom timeline.
This calculator was developed with Medtronic™ devices in mind.
Collect Values
- Identify representative peak and trough LFP values from the patient's recording timeline.
- Type each peak value into the Peak (upper) LFPs card.
- Type each trough value into the Trough (lower) LFPs card.
- Use + Add value to add more rows; the × button removes a row.
- Clear all resets both lists.
- The two lists are independent — you can enter differing numbers of peaks and troughs. A minimum of three values for each is recommended.
Read Results
The Mean peak and Mean trough tiles update live as you type. Below them, the suggested aDBS thresholds are calculated as:
- Upper threshold = meanLower + 0.75 × (meanUpper − meanLower)
- Lower threshold = meanLower + 0.25 × (meanUpper − meanLower)
These place the upper threshold three-quarters of the way up the dynamic range and the lower threshold one-quarter of the way up.
About
This calculator was developed by Dr Owen Chan. It is intended as a bedside aid for clinicians programming adaptive deep brain stimulation.
If you have any questions or feedback, please reach out at owen@owenchan.com.au.
Thank you for using this calculator. I hope it helps your patients and your clinical workflow.