Reliability of Pain Vision method for assessment of labor pain: a comparison with visual analog scale / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the reliability of Pain Vision method for assessment of labor pain.Methods Eighty-nine nulliparous parturients who were at full term and at the latent period of the first stage of labor,aged 19-31 yr,weighing 55-85 kg,were enrolled in this study.The degree of labor pain was assessed using Pain Vision method and VAS.Pain degree is calculated from two parameters,current perception threshold and pain compatible electrical current by using a somatosensory evoked potential stimulator.The former parameter was defined by the lowest electrical current detected; the latter parameter defined by the electrical current judged as being compatible with the intensity of ongoing pain.Linear correlation of VAS scores with pain degree was analyzed.Results There was no correlation between pain degree and VAS scores,and the correlation coefficient was 0.206 (P ＞ 0.05).Conclusion Pain Vision method can not be applied for objective assessment of labor pain.