10% Lidocaine Spray for Pain Control During Intrauterine Device Insertion: A Randomized, Double-blinded, Placebo Controlled Trial

Intrauterine device (IUD) is a high efficacy long-acting reversible contraceptive method. However, IUD insertion is a procedure that require well-trained medical personnel and can cause pain in several steps during insertion such as applying tenaculum, applying uterine sound and insertion of IUD. Fear of pain during IUD insertion is a barrier to use of this contraceptive method. Previous researches reported mean pain score with using visual analog scale (VAS) moderated pain (4.7/10 and 34.7-51.2/100). In several countries, pain control is used before IUD insertion procedure. Currently, there is no recommended standard method for reducing pain during this procedure. From Cochrane Database 2015, some lidocaine formulations, such as lidocaine spray, lidocaine gel and lidocaine paracervical injection, could reduce pain during IUD insertion, but there is limited data on effect of lidocaine spray on reducing pain during insertion of IUD.

Lidocaine is introduced to use for pain relieving in medical procedures with advantages of rapid action and minimal side effects.10% Lidocaine spray is a form of local anesthetic method that use in obstetrics and gynecology procedures and has favorable efficacy in reducing pain. Nevertheless, there were limited studies of 10% Lidocaine spray during IUD insertion. In this study, we investigate pain during IUD insertion using lidocaine spray compared with placebo.