The sentence provided seems to mix medical terminology with nonsensical or out-of-context phrases, making it challenging to produce an accurate and coherent translation. However, I will focus on translating the coherent parts related to medical content:
Controlled analgesia in the prostate is often more serious. The incidence of bladder spasm pain is about 10-11%, occurring after 3 days. This complication not only causes the patient great pain but can also lead to postoperative bleeding and poor catheter patency. For this group of patients, intramuscular analgesics generally have a poor effect. Trials using 1% procaine or 2% tetracaine for bladder instillation pain relief have also been unsatisfactory. Researchers have reported that epidural injection of morphine and other narcotic drugs can significantly inhibit the micturition reflex, resulting in a staged analgesic effect in the region; however, this method is cumbersome, and repeated injections easily increase the risk of infection in the epidural space. Patient-controlled analgesia (PCA) is a new type of pain management technique that meets the varying needs of different patients at different times or degrees of pain, providing optimal analgesic effects. The application of this technology in preventing bladder spasm pain after BPH surgery has proven very effective. Continuous small doses through the PCA pain pump in 45 cases of postoperative BPH patients have significantly reduced the frequency and intensity of postoperative wound pain and bladder spasm pain in the prostate, with longer-lasting, easy-to-operate, safe, and minimally physiologically disruptive advantages, making it a better analgesic method.
Please note that some parts of the original text were unclear or irrelevant, so they were omitted in the translation for clarity and coherence.