Stenosed fibrosed internal OS,technique for epidural cath directed entry, koch's uterus adhesiolysi

This video shows how it may be difficult to site the internal os because of dense fibrosis causing severe stenosis at internal os.How inadvertent false passage can form in these cases .How to utilise the epidural catheter to track inside the uterus after changing to smaller sheath of 2.9mm scope from larger 4mm scope Bettocchi's sheath.Lastly how dilate under vision the os by reinserting the 4mm Bettocchi's sheath & compress the false passage at the same time.Beware when the scope starts to bend due to force applied to enter into the OS.