Background: Catheterisation is the key definitive emergency procedure in relieving urethral obstruction. However, ensuring that the patient is stable to tolerate the procedure and having a plan in place if placement is challenging is also essential. Aim of the article: This is the second article in a three-part series. The aim of this article is to summarise urethral catheterisation, and immediate postcatheterisation management. The first article discussed presentation and stabilisation (Breheny and others 2022), while the third will focus on home management to prevent recurrent obstruction and on addressing underlying feline idiopathic cystitis.