Human Reproduction, Vol. 14, No. 11, 2783-2787,
November 1999
© 1999 European Society of Human Reproduction and Embryology
A prospective, randomized, double-blind and placebo-controlled study to assess the efficacy of paracervical block in the pain relief during egg collection in IVF
Department of Obstetrics & Gynaecology, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People's Republic of China
The role of paracervical block in the pain relief during egg collection in in-vitro fertilization (IVF) is still not confirmed. In this prospective, double-blind and placebo-controlled study, 135 patients undergoing egg collection in their first IVF cycle were randomized to receive 10 ml of 1.5% lignocaine (group A) or normal saline (group B) in the paracervical block and no local injection (group C). No differences were seen among the groups in the demographic data, the ovarian response, the duration of egg collection, the number of follicles punctured, the pregnancy rates and the pain levels related to blood taking, scanning and insertion of an i.v. cannula. All patients experienced similar pain scores for vaginal puncture but patients in group A experienced significantly less abdominal pain during egg collection, compared with those in group B and group C (P = 0.009 and P = 0.001 respectively; Mann–Whitney U-test). When lignocaine was used, the abdominal pain scores were reduced by 38.9 and 51.4% compared with placebo and no local injection respectively. We recommend that paracervical block with lignocaine should be used in conjunction with i.v. sedation/analgesia during egg collection performed through the transvaginal route under ultrasound guidance (TUGOR) to reduce the pain of the procedure.
Key words: embryo transfer/IVF/lignocaine/pain relief/paracervical block
1 To whom correspondence should be addressed
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