Pain Clinical Trial
Official title:
MEOPA Breathing Analgesia vs Local Anesthesia for Oocyte Retrieval in ART: a Prospective, Randomized Controlled Study
The purpose of this study is to assess pain, at or after oocyte retrieval, the effectiveness of self-controlled inhalation analgesia by nitrous oxide (N2O of 50% and 50% O2) by the patient compared to a local anesthesia combined with a tablet of 0.5 mg of Alprazolam.
Oocyte retrieval is a major event during in VITRO-fertilization, with or without sperm micro-injection. Initially done by laparoscopy with general anesthesia, the oocyte collection is now carried out by trans-vaginal controlled ultrasound puncture. This potential painful event, related to trans-vaginal puncture or mechanical movements of the stimulated ovary, requires analgesia or anesthesia. General anesthesia is certainly effective in terms of collected oocytes. It remains, however, a heavy time consumer, with personal risks and distributor of anesthetic agents in blood or follicular fluid. These products could have a deleterious effect on early embryonic development or implantation. Few data are available concerning these risks in the literature. General anesthesia is still essential for pusillanimous patients or for patients with a heavy surgical past. Nitrous oxide is an inhaled gas with properties widely used in obstetric during parturition. It is regularly used during general anesthesia performed for oocyte retrieval. With a gas composed of 50% N2O and 50% O2, its main interest is to provide analgesia in a state of conscious sedation. The effects of nitrous oxide in this form had never been assessed on the clinical or biological Oocyte collection. We conducted a preliminary study to assess pain in patients receiving local anesthesia, according the current protocol. Thus, 44% of patients had severe pain (VAS> 40/100) during or just after transvaginal oocyte retrieval. In our preliminary experience, immediate or distance post-operative pain was high and we plan to evaluate the benefit of analgesia with nitrous oxide in terms of immediate post-operative pain with a prospective, randomized and controlled study as compared with local anesthesia associated to Alprazolam. ;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
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