手术危险性 meaning in English

operative risk

Doctors say the operation is too risky
医生称手术危险性太高。
It has also been demonstrated that botulinum a toxin is effective at reducing prostatic gland volume as part of the treatment of benign prostatic hyperplasia with associated chronic urinary retention especially for a subset of such patients who are at surgical risk
研究也证实，肉毒杆菌毒素施打于前列腺内可治前列腺阻塞造成之慢性尿滞留，尤其针封具有手术危险性之病患。