Prevalence and Predictors of Distal Limb Ischemia in Minimally Invasive Cardiac Surgery.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 280
- 试验地点
- 1
- 主要终点
- Drop of 15% in regional oxygen saturation (rSO2) lasting 4 minutes or longer between the cannulated and non-cannulated limb
研究概览
简要总结
Peripheral arterial cannulation is a necessity for installation of cardiopulmonary bypass in minimally invasive cardiac surgery (MICS). In the vast majority of cases, the femoral artery is the preferred arterial cannulation site. Distal limb hypoperfusion and ischemia can occur in the cannulated limb since antegrade perfusion is not routinely provided. Furthermore, the diameter of the cannula required to maintain adequate cardiopulmonary bypass (CPB) flow is often approaching that of the patient's femoral artery diameter, compromising distal blood flow. The possibility of distal limb ischemia is often raised as a criticism to peripheral cannulation for cardiopulmonary bypass and by extent to minimally invasive cardiac surgery. Ischemia of the lower limb is of high incidence in patients undergoing extracorporeal membrane oxygenation (ECMO) therapy, in which the same femoral cannulation technique is used. Therefore this complication has extensively been described in ECMO literature. However, no clinical trials have been performed in patients undergoing MICS, despite the same cannulation and perfusion route. ECMO patients often differ from MICS patients in morbidity as well as in duration of cannulation. Up to now, one could not observe any clinical sequelae of limb ischemia in MICS patients but a formal study of distal leg perfusion in MICS is recommended to screen its safety and to identify possible risk factors.
详细描述
Study design and setting Single-center prospective observational cohort study in patients undergoing minimally invasive cardiac surgery with peripheral arterial cannulation. This is the standard of care in the institution of the investigators.
Population All consecutive patients presenting for minimally invasive cardiac surgery will be screened for participation to the study. Eligible participants fulfill all inclusion criteria and no exclusion criteria (described below in more detail).
NIRS Near infrared spectroscopy (NIRS) is currently accepted as the golden standard monitoring tool for tissue oxygenation and for early detection of ischemia. The NIRS measures and displays a percent regional oxygenation saturation (rSO2). This value quantifies the percentage of regional hemoglobin oxygen saturation. It is measured by an electrode placed on the skin, and is therefore totally non-invasive. NIRS originally has been used to measure brain saturation, but its indications have been extended to any region of interest. Multiple studies validated NIRS as a useful monitor for detection of ischemia of the lower extremities in various settings (ECMO patients, patients with peripherally vascular disease). Patton-Rivera at al. showed rSO2 differentials > 15% had a 100% sensitivity and specificity for the detection of clinically markable hypoperfusion of the cannulated leg in ECMO patients.
Data collection Patient demographics and medical history will be collected together with the EuroScore II i.e the estimated risk of in-hospital death after cardiac surgery. NIRS values will be coded and anonymously recorded onto a Universal Serial Bus (USB) device and saved on a pc with limited access. rSO2 differentials between the cannulated and non-cannulated leg and Tissue Oxygenation Index (TOI) differentials from baseline in the cannulated leg will be noted (%). After completion and publication of the study all data will be deleted from the device.
Data for analyses of variables will be extracted from the anesthetic and perfusion charts. These charts are stored in the patients individual record.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
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
- •Patients undergoing minimally invasive cardiac surgery older than 18 years.
排除标准
- •History of leg amputation.
- •Calf muscle atrophy due to neuromuscular disorder or muscle diseases.
- •Stanford type A aortic dissection.
- •Allergy for NIRS electrode.
- •Revision surgery < 72h after primary surgery.
- •Postoperative need for intra-aortic balloon pump and/or ECMO.
结局指标
主要结局
Drop of 15% in regional oxygen saturation (rSO2) lasting 4 minutes or longer between the cannulated and non-cannulated limb
时间窗: Duration of the surgery
A drop of 15% or more in StO2 for ≥ 4 minutes between the cannulated and non-cannulated leg during the cannulation period
次要结局
- Relationship between distal limb ischemia and acute kidney injury(through study completion, an average of 6 months)
- Identification of predictors of poor distal perfusion in the cannulated limb(from surgery until 6 months after surgery)
- Difference in tissue oxygenation index (TOI) compared to baseline(Duration of the surgery)
- Peripheral vascular surgery(6 months after surgery)
研究者
Stessel Björn
Principal Investigator, Anesthesiologist, MD, PhD
Jessa Hospital