Pain-Induced Pulsograph Changes in Patients with Primary Dysmenorrhea: A Pilot Study
Objectives. To investigate changes in pulsograph caused by pain in primary dysmenorrhea (PD) patients.Methods. Pulsograph and pain level of PD patients were detected using electropulsograph and Visual-Analogue Scale (VAS), respectively, at four time points, 7–10 days before menstruation(T0), maximal pain during menstruation(T1), immediately after acupuncture analgesia(T2), and 30 mins after acupuncture analgesia(T3). Parameters (t,h,w) and normalized time parameters (t′) of pulsograph were analyzed.Results. VAS pain scores decreased from 6.40 ± 1.13 atT1to 0.70 ± 0.75 atT2to 0.11 ± 0.32 atT3(P<0.001and 0.001). AtT1, compared with those atT0,w1,h3, andh4significantly increased (P<0.01), andt2,t2′,t3′, andh(d) significantly decreased (P<0.01, 0.001, 0.05, and 0.001). AtT2, compared with those atT1,t1,w1,w2,h2,h3,t1′, andt4′ significantly decreased (P<0.05, 0.01, 0.01, 0.001, 0.01, 0.001, and 0.05), andh(d) significantly increased (P<0.001). There was no difference betweenT2andT3.Conclusions. There are almost opposite changing trends in pulsographic parameters when pain occurs and when it is relieved in PD patients.