Applied psychophysiology and biofeedback
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Appl Psychophysiol Biofeedback · Sep 2010
Randomized Controlled TrialFirst non-contingent respiratory biofeedback placebo versus contingent biofeedback in patients with chronic low back pain: a randomized, controlled, double-blind trial.
Previous studies reported that respiratory feedback (RFB) aids in alleviating chronic pain. However, to date, this adjunct treatment has not been rigorously tested against non-contingent (placebo) feedback. Forty-two patients with chronic low back pain were randomized to either RFB or non-contingent RFB. ⋯ This is the first study using a non-contingent respiratory placebo feedback in a randomized, controlled design. Within this design previous positive findings of symptom reductions in patients treated with RFB could partially replicated. Nonetheless, tendencies suggest that contingent feedback patients compared to placebo patients profit more from RFB in the long run regarding reduction of chronic pain and psychological distress.
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Appl Psychophysiol Biofeedback · Sep 2010
A measurement of electrocardiography and photoplethesmography in obese children.
The purpose of this study was to establish heart rate variability normative data on obese children and to comparing the accuracy of two medical technologies photoplethesmography (PPG) with electrocardiography (ECG) while measuring heart rate variability (HRV). PPG is a relatively new technique that holds promise for health care practitioners as an evaluative tool and biofeedback instrument due to its cost and easy administration. ⋯ PPG was measured from a thumb sensor and ECG from sensors placed under wristbands on both wrists. The results indicate that PPG is as effective as ECG in measuring the eleven parameters of heart rate variability.