Prospective Randomized Simple Blinded Study Comparing Two Conversion Ratios From Parenteral to Oral Methadone in Patients With Cancer Pain.
试验速览
- 阶段
- 3 期
- 状态
- 已完成
- 发起方
- 入组人数
- 44
- 试验地点
- 6
- 主要终点
- Proportion of intoxicated patients in each groups
研究概览
简要总结
The majority of current studies regarding the use of methadone (MTD) in the treatment of cancer pain are focused in its administration via the oral route (PO). The ratio considered from VO to parenteral route (BP) is 2:1. Academic literature assumes the ratio from BP to VO to be 1:2. In our unit, we use MTD in the context of ROP and not as the last opioid. If face with a situation where there is a good control of pain with MTD BP, usually we move to VO. We have observed that the traditional ratio tend to produce certain toxicity problems. Because of this, we have proposed a new ratio of conversion from PAR MTD to oral MTD, i.e. 1:1.2
详细描述
OBJECTIVE
To compare the different ratios of conversion from MTD VP to MTD PO. To verify the presence of lower toxicity in the ratio 1:1.2 against 1:2 while still maintaining a good control of pain in patients with advanced cancer that are hospitalized in different palliative care units.
METHODOLOGY: Prospective randomized single blind study in patients with cancer pain treated with parenteral MTD and that would move into MTD oral provided there is good control of pain. The patients will be randomly split into two groups: (Group A = ratio 1:1.2 and Group B=ratio 1:2). Patients will be evaluated during the two days before the switch is applied, the day of the change and during the 3 days post-ROP. The patients who display significant toxicity and/or bad analgesic control within the first 72 hours post-ROP will be considered negative cases. The size of the sample required will include 44 patients distributed in balanced groups in order to obtain a size effect of 45% and a statistical power of 80%. The significance level will be 0.05 for two tails.
STATISTIC ANALYSIS: By means of Chi-squared to compare the proportion of Opioid Rotation (OR) failure in both groups of study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Supportive Care
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •diagnosis of advanced disease of any type of malignancy;
- •>18 years old at the time of inclusion;
- •for inclusion in the screening phase, the patient is a candidate to pass parenteral methadone to oral methadone (MTD) following to the physician criteria.
- •for inclusion in the assessment phase should follow: presence of cancer pain controlled with no significant toxicity with MTD VP for 48h. Be considered controlled pain and absence of significant toxicity due to MTD, as the definitions given in the general protocol;
- •e) signing the informed consent form.
排除标准
- •impairment cognitive status that interferes with the assessment;
- •diagnosis of psychiatric disorders at the time of recruitment that alters the ability to evaluate;
- •presence of side effects due to chemotherapy and / or radiotherapy prior to the change of route of administration, taking into account the following two criteria:
- •For patients on a protocol of successive cycles of chemotherapy (no change in chemotherapy regimen), having presented side effects due to chemotherapy in the 15 days prior to the change of route of administration as clinically and following the recommendations of the 2011 4th ed Oncomecum of the Spanish Society of Medical Oncology and deemed that may interfere with the assessment of the primary endpoint.
- •For patients starting a new protocol of chemotherapy or radiotherapy, have submitted side effects due to such treatment in the 28 days prior to the change of route of administration based on clinical judgment and following the recommendations of the Oncomecum 2011 4th ed. of the Spanish Society of Medical Oncology and deemed that may interfere with the assessment of the primary endpoint.
- •invasive anesthesic techniques have been made during the 3 days before changing to oral parenteral;
- •patients at agony.
结局指标
主要结局
Proportion of intoxicated patients in each groups
时间窗: at 3 days after opioid rotation to Oral Methadone
次要结局
- Parenteral/oral MTD final ratio in patients considered as "failure"(One week after the change from pareteral to oral MTD)
研究者
JESÚS GONZÁLEZ BARBOTEO
MEDICAL DOCTOR
L'Hospitalet de Llobregat