Predictors of Post Operative Outcome in Peripheral Vascular Surgical Patients
Prognostic Markers of Outcome in Patients Undergoing Infra-inguinal Revascularisation. A Prospective Observational Study.
Over 3000 people each year undergo bypass operations to their lower limbs, and these operations carry significant risks with approximately 1 in 20 of these people dying in hospital, and another 1 in 20 having a heart attack.
Assessment of these patients in order to stratify their risk of both dying and having significant complications aid in improving their care, enable better utilisation of scarce critical care resources, and allow us to give patients better information on which to base consent.
Aims The aims of the project are to assess the feasibility of exercise testing this group of patients both with cycle and arm exercise, and to identify markers of outcome in this group.
Methodology This is a prospective observational study designed to test the hypothesis that a combination of cardiopulmonary exercise testing and blood tests provides prognostic value on outcome measures after surgery for lower limb revascularisation
Subjects will have 2 exercise tests, one arm and one cycle, prior to surgery at their preoperative assessment appointment. From these tests we will measure how much work patients can do, how much oxygen they are able to use, and when the heart is unable to deliver enough oxygen to the cells. In addition they will have blood samples taken prior to the operation (brain natriuretic peptide), and on days 1 and 3 (troponin I) after the operation to look at cardiac markers of damage.
This data will be used to see if we can predict those patients that have both short and long term complications, and also to see whether the different forms of exercise testing are comparable, or if one type is superior.
Expected outcomes We expect that through a combination of exercise testing and blood test we will be able to identify patients at increased risk of complications after surgery. We also expect to find that arm exercise will be a more feasible and informative test that cycle exercise.
研究概览
地位
条件
详细说明
Background Over 3000 people each year undergo bypass operations to their lower limbs, and these operations carry significant risks with approximately 1 in 20 of these people dying in hospital, and another 1 in 20 having a heart attack. The number of people having this type of procedure has grown over recent years and the trend is predicted to continue. Due to this significant increase in the volume of these patients, and the associated complications that occur with this surgery, utilisation of more resources such as critical care is often needed.
Assessment of these patients in order to stratify their risk of both dying and having significant complications aid in improving their care, allow better utilisation of scarce critical care resources, and also allow us to provide patients with better information as part of the informed consent process.
A high risk group in major abdominal surgery can be identified through a simple exercise test (cardiopulmonary exercise test) that looks at how the body uses oxygen, and also through a blood test that look at a hormone secreted by the heart. Vascular surgical patients are at risk for the development of major cardiac complications in the postoperative period but a system for appropriate preoperative risk stratifications has yet to be achieved.
Aims The aims of the project are to assess the feasibility of exercise testing this group of patients both with cycle and arm exercise, and to identify markers of outcome in this group. Identification of markers that can predict how patients will fare after surgery will allow us to improve the informed consent process, utilise resources more effectively and efficiently and identify opportunities to attempt to modify outcomes.
Methodology This is a prospective observational study designed to test the hypothesis that a combination of cardiopulmonary exercise testing and blood tests provide prognostic value on outcome measures after surgery for lower limb revascularisation.
Participants will have 2 exercise tests, one arm and one cycle, prior to surgery at their preoperative assessment appointment. From these tests we will measure how much work patients can do, how much oxygen they are able to use, and when the heart is unable to deliver enough oxygen to the cells. In addition they will have blood samples taken prior to the operation (brain natriuretic peptide), and on days 1 and 3 (troponin I) after the operation to look at cardiac markers of damage.
This data will be used to see if we can predict those patients that have both short and long term complications, and also to see whether the different forms of exercise testing are comparable, or if one type is superior.
Expected outcomes We expect that through a combination of exercise testing and a blood test we will be able to identify patients at increased risk of complications after surgery. We also expect to find that arm exercise will be a more feasible and informative test that cycle exercise.
Implications Identification of a high risk group would allow appropriate strategies to be implemented to reduce risk, and allow better post-operative resource utilisation. This study will also allow a larger multicentre study to be adequately powered and constructed.
研究类型
注册 (实际的)
联系人和位置
学习地点
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North Yorkshire
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York、North Yorkshire、英国、YO318HE
- York Teaching Hospitals NHS Foundation Trust
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
取样方法
研究人群
描述
Inclusion Criteria:
- All patients undergoing elective and expedited infra inguinal peripheral revascularisation. Patients undergoing radiological assessment (angiography) and/or radiological intervention for peripheral vascular disease
Exclusion Criteria:
- Patients refusing to participate in the study or unable to give informed consent.
学习计划
研究是如何设计的?
设计细节
队列和干预
团体/队列 |
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Peripheral vascular disease
Subjects who have peripheral vascular disease
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研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
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1 year all cause mortality
大体时间:1 year
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1 year
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
---|---|---|
1 year major adverse cardiac event.
大体时间:1 year
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1 year
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Morbidity as measured by the Post operative morbidity survey
大体时间:7 days
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7 days
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major adverse cardiac event.
大体时间:participants will be followed for the duration of hospital stay, an expected median of 10 days
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participants will be followed for the duration of hospital stay, an expected median of 10 days
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30 day all cause mortality.
大体时间:30 day
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30 day
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Surgical post operative complications
大体时间:participants will be followed for the duration of hospital stay, an expected median of 10 days
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participants will be followed for the duration of hospital stay, an expected median of 10 days
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participants will be followed for the duration of hospital stay, an expected median of 10 days
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Medical post operative complications
大体时间:participants will be followed for the duration of hospital stay, an expected median of 10 days
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participants will be followed for the duration of hospital stay, an expected median of 10 days
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participants will be followed for the duration of hospital stay, an expected median of 10 days
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Quality of life measured at 6 and 12 months postoperatively by the EQ-5D-5L questionnaire.
大体时间:0,6 and 12 months
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0,6 and 12 months
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合作者和调查者
调查人员
- 首席研究员:Simon J Davies, MBChB、York Teaching Hospital NHS Foundation Trust
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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