Morphine After Radiofrequency Ablation of Painful Bone Metastases in Patients With Cancer

Intravenous administration of paracetamol (4 g / 24h) and patient-controlled analgesia (PCA).

Patient-controlled analgesia (PCA), allowing morphine consumption to be titrated to the patient's needs and thus allowing morphine doses to be adapted to an increase in pain in the patient's post-operative period or a rapid analgesic effect of radiofrequency.

"Pain notebook will allow the patient to describe the pain specific to the metastasis concerned, containing information on :~* The intensity of the minimum, average and maximum pain of the last 24 months. hours as well as the intensity of the pain of the moment according to a scale 11-point digital,~* the background morphine analgesic treatment during the last 24 hours,~* the morphine analgesic treatment taken during painful attacks,~* the possible undesirable effects of morphine treatment.~* the morphinic, non-morphinic and co-antalgic treatment is noted, as well as that the total dose of oral morphine or oral morphine equivalent"

Patients' quality of life will be assessed using the quality of life questionnaire EORTC QLQ-C30 at inclusion in the study and at 8 weeks after radiofrequency. ablation.

"Recent technique of thermal destruction of tumors.~This technique consists of inserting an electrode needle into the tumour under X-ray or ultrasound guidance or intraoperatively under laparoscopy for example. This needle carries a current or a light wave depending on the characteristics of the generator to which it is connected (radiofrequency, laser).~Radio frequencies are radiation non-ionising electromagnets. In this context of tissue ablathermia wavelengths ranging from 400kHz to 500kHz."