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Correlation between Central Venous Pressure and the Diameter of Inferior Vena Cava by using Ultrasonography for the Assessment of the Fluid Status in Intensive Care Unit Patients

医学 血管内容积状态 中心静脉压 下腔静脉 重症监护室 超声科 预加载 重症监护 腔静脉 仰卧位 血压 脉冲压力 中心静脉导管 放射科 冲程容积 急诊医学 血流动力学 麻醉 重症监护医学 外科 心率 导管 内科学
作者
Mostafa I. Shalaby,Hussein Montasser Roshdy,Wael Mohamed Elmahdy,Anas Ezzat Fathy El Mezayen
出处
期刊:The Egyptian Journal of Hospital Medicine [Egypts Presidential Specialized Council for Education and Scientific Research]
卷期号:72 (10): 5375-5384 被引量:6
标识
DOI:10.21608/ejhm.2018.11283
摘要

Background: decisions regarding fluid therapy, whether in the operating theatre, intensive care unit, emergency department, are among the most challenging and important tasks that clinicians face on a daily basis. Specifically, almost all clinicians would agree that both hypovolaemia and volume overload increase the morbidity and mortality of patients. The therapeutic goal of fluid administration is to increase preload, or the stressed venous volume, leading to an in­creased stroke volume and cardiac output. However, studies of patients with acute illness or hypotensive patients in the intensive care unit consistently demonstrate that approximately 50% of fluid boluses fail to achieve the intended effect of increasing car­diac output. Aim of the Work: this study was done to evaluate the correlation between central venous pressure (CVP) measurements and ultrasound measurements of the inferior vena cava diameter, and collapsibility index. The secondary aim was to evaluate the value of ultrasound as a noninvasive tool in assessment of intravascular volume status and fluid responsiveness in critically ill intensive care unit patients. Patients and Methods: after obtaining the approval of the Al-Azhar University Ethical Committee and written informed consent, 50 patients aged 30-60 years of either sex, ASA I-III admitted in the ICU of Al-Azhar teaching hospitals who had a functioning central venous catheter inserted for any clinical indication, were involved in this single blinded correlational study.  Hemodynamic parameters were monitored continuously including heart rate and non-invasive mean arterial blood pressure. CVP measurements were taken with the patient in the supine position. Clinical assessment was done for signs of hypovolemia like hypotension, tachycardia, prolongation of capillary refill: >3 seconds, acidosis, increased serum lactate more than 2 mmol/L or loss of skin turgor. Results: in our study, there was a significant correlation between CVP and the two studied ultrasound parameters, IVC CI and IVCdmax. Analysis of the receiver operating characteristic curve ROC showed that inferior vena cava collapsibility index (IVC CI) had the most favorable performance of the two ultrasound parameters in predicting CVP < 10 cm H2O.  As regards prediction of fluid responsiveness, analysis of the ROC showed a better diagnostic accuracy of IVC collapsibility index and IVC diameter for predicting fluid responsiveness. Conclusion: ultrasound of the inferior vena cava may be used as a feasible non-invasive, rapid and simple adjuvant method to assess the intravascular volume and guide fluid responsiveness in critically ill intensive care unit patients, inferior vena cava collapsibility index may be used to predict low central venous pressure and predict fluid responsiveness.
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