Physiological and Psychological Evaluation of the Wrapped Warm Footbath as a Complementary Nursing Therapy to Induce Relaxation in Hospitalized Patients With Incurable Cancer A Pilot Study

Background: The wrapped warm footbath (WW-footbath) was originally designed as a means to promote relaxation, positive emotion, comfort, pleasure, and enjoyment in hospitalized patients with incurable stomach cancer during palliative care. Objectives: This study examined the physiological and psychological effects of the WW-footbath as complementary nursing intervention to induce relaxation in hospitalized patients with incurable cancer. Methods: Eighteen subjects were divided into a footbath group (n = 9) and a control group (n = 9). Heart rate variability analysis (per second) with wavelet transformation was used for evaluation of autonomic, sympathetic, and parasympathetic activities. Salivary secretory immunoglobulin A and salivary cortisol levels were used as neuroimmunological parameters. Pain and psychological conditions were measured using a visual analog scale and Face Scale (FS). Results: The high-frequency component of heart rate variability was not significantly increased in either group. However, the low-frequency component versus high-frequency ratio was significantly decreased in the footbath group at periods after footbath (P = .017, P = .000, P = .000, P = .003). In the footbath group, the salivary secretory immunoglobulin A level was significantly increased (P = .019), and the cortisol level tended to be reduced. Changes in visual analog scale and FS scores showed that the footbath group experienced significant pain relief and relaxation (pain, P = .047; relaxation, P = .042; comfortability, P = .008; FS, P = .013). Conclusions: The WW-footbath significantly decreased sympathetic activity in hospitalized patients with incurable cancer and may have secondary benefit for pain relief. Implications for Practice: The WW-footbath can promote relaxation in hospitalized patients with incurable cancer. Moreover, the WW-footbath appears to afford pain relief associated with enhanced overall comfort.