This in vivo study was performed to determine whether exposure to pulsed electromagnetic field reduces post-operative (ablation of ovaries and uterus) pain in dogs and whether it interacts with post-operative morphine analgesia.
16 healthy dogs weighting 10-32 kg and aged 3-36 months were examined within 6 hours post-operative at 8 different time points. Four groups were performed: 1.) control group (NaCl administration), 2.) post-operative pulsed electromagnetic field exposure (NaCl administration), 3.) post-operative morphine application and 4.) post-operative morphine application plus pulsed electromagnetic field exposure.
No parameters are specified for this exposure.
Significant differences in mean arterial blood pressure occurred at 5 hours in groups 3 and 4 (mean arterial blood pressure in group 3/4 < group 2), and at 6 hours in group 4 (mean arterial blood pressure in group 4 < group 1/2) compared to control group. At 30 minutes the total pain score for group 4 was significantly less than for control group, but not significantly different from group 2 or 3.
Although no clear benefit of electromagnetic therapy was seen, the results suggest that pulsed electromagnetic field may augment morphine analgesia post-operative in dogs.