Effective analgesia following perineal injury during childbirth: a placebo controlled trial of prophylactic rectal diclofenac.

OBJECTIVE

To determine if diclofenac suppositories administered prophylactically produce effective and lasting analgesia following perineal injury.

DESIGN

A randomised double blind placebo controlled trial.

SETTING

York District Hospital.

POPULATION

One hundred women sustaining objective perineal injury (second degree tear or episiotomy) during spontaneous vaginal delivery at term.

METHODS

Suppositories were administered at the time of repair and approximately 12 hours later. The suppositories were randomised prior to issue by the pharmacy department and contained either 100 mg diclofenac or placebo.

MAIN OUTCOME MEASURES

Pain scores assessed at 12, 24, 48 and 72 hours after delivery using a six point numerical scoring system and the use of additional analgesia and local treatments to the perineum.

RESULTS

The mean pain score was significantly reduced in the diclofenac group at 24, 48 and 72 hours after delivery (0.86, 0.7 and 0.59, respectively) compared with the control group (1.64, 1.31 and 1.5; P < 0.005). In addition there was less supplementary analgesia required (eight women only at 72 hours compared with 15 in the control group) and this was limited to paracetamol or topical treatments to the perineum.

CONCLUSION

Prophylactic rectal diclofenac provides effective analgesia after perineal repair and its effect appears to be maintained into the second and third postpartum days.