This is a single-arm multicenter study that will involve 8-10 centers and 50 cases in total. A better pumping mode was discovered through repeated optimization and adjustment of PCA pump parameters, ensuring the unity of convenience, safety, and flexibility: on the one hand, it is convenient for clinicians to set up and adjust the pump quickly; on the other hand, it is also convenient for patients to control at home; thus, it solves the complex pumping and dosing problems. Nearly 20 patients with severe cancer pain or a cancer pain crisis were treated using this model, and the control satisfaction rate was 100% in each case.~The purpose of this study is to:~Main objective: To explore the efficacy and adverse effects of a simple hydromorphone PCA pump model, i.e., rapid titration followed by maintenance, for the treatment of patients with severe cancer pain or cancer pain crisis or refractory cancer pain in home cancer patients.~Exploratory purpose: To screen sensitive indicators for cancer pain assessment and efficacy monitoring by Ella fully automated microfluidic ELISA system, and to explore the mechanism of action of pain-causing substances in cancer pain initially.
This prospective observational study will evaluate the efficacy and adverse effects of a simple hydromorphone PCA pump model, which is a rapid titration followed by a convenient maintenance technique, to treat home cancer patients with severe or critical cancer pain or refractory cancer pain.