The changes in the pressure pain threshold (PPThr) and pressure pain tolerance (PPTol) in 41 parturients have been studied during the active phase of labour and in the early post-partum period. The sensitivity to pressure stimuli was examined with an electronic pressure algometer placed on the sternum during the interval between painful contractions, after extradural analgesia and 24 h after childbirth. Prior to extradural analgesia, mean (± SD), PPThr and PPTol were 4.9 ± 1.6 kg 0.25 cm-2 and 6.9 ± 1.8 kg 0.25 cm-2 respectively. Similar values were recorded 1 h after induction of the extradural block when the pain of labour was abolished. At 24 h post-delivery, a significant decrease in both PPThr and PPTol was noted (P < 0.001), The lack of influence of extradural analgesia on pressure algometry values, and the elevated sensitivity to pain in the early post-partum period, may be related to the influence of pregnancy and labour on the appreciation of pain.
|Number of pages||5|
|Journal||European Journal of Anaesthesiology|
|State||Published - 1995|
- Analgesia, labour
- Pressure algometry