Lidocaine vaginal gel versus lidocaine paracervical block for analgesia during oocyte retrieval.
BACKGROUND
Evidence from randomized trials suggests that pain relief during oocyte retrieval is superior when adjunctive paracervical block is used in addition to sedation alone. Vaginal application of lidocaine gel is a non-invasive alternative to lidocaine paracervical block. The goal of the present trial was to compare analgesia with lidocaine vaginal gel versus lidocaine paracervical block.


METHODS
A parallel-group randomized trial of adjunctive lidocaine vaginal gel versus adjunctive lidocaine paracervical block (with sedation for both groups) was performed in participants undergoing oocyte retrieval. Measured outcomes were subjective pain experiences. Subjects provided self-reported ratings of pain and anxiety. Visual analogue scales were used to measure pain during different procedural stages. The McGill Pain Questionnaire was used to measure pain character and the total pain experience.


RESULTS
During application of lidocaine, pain ratings were less for vaginal gel than paracervical block. In contrast, during insertion of the aspiration needle and aspiration of follicles, pain ratings were greater for lidocaine vaginal gel. Total pain experience was greater with lidocaine vaginal gel.


CONCLUSIONS
Subjective measures of pain intensity and the total pain experience were greater with lidocaine vaginal gel compared with lidocaine paracervical block.
Tummon
Ian
I
Department of Obstetrics and Gynaecology, The University of Western Ontario, London, Ontario, Canada. tummon.ian@mayo.edu
Newton
Christopher
C
Lee
Clive
C
Martin
James
J
D000282:Administration, Intravaginal; D000328:Adult; D000773:Anesthesia, Obstetrical; D000779:Anesthetics, Local / Q000008:administration & dosage* / Q000009:adverse effects; D001007:Anxiety / Q000188:drug therapy; D005260:Female; D005500:Follow-Up Studies; D005782:Gels; D006801:Humans; D008012:Lidocaine / Q000008:administration & dosage* / Q000009:adverse effects; D009865:Oocytes; D006080:Ovarian Follicle; D010146:Pain / Q000188:drug therapy; D010147:Pain Measurement; D027724:Reproductive Techniques, Assisted
D000779:Anesthetics, Local; D005782:Gels; D008012:Lidocaine