Romana Kanwal, Riffat Saeed, Amer Latif, Tooba Ammar, Hussam Ahmad, Saeeda Rana 2024. Comparison between Effectiveness of Epidural Catheter by Using Two Techniques Air Versus Saline as Pre-Emptive Analgesia in Obstetric Patients. Pakistan Journal of Medical & Health Sciences. 18, 01 (Jan. 2024), 223. DOI:https://doi.org/10.53350/pjmhs02024181223.