Article or book title, author's surname, DOI

Application of the method of thermodilution to assess the hemodynamics of patients with pulmonary hypertension

Л.В. Сазыкина1, Д.Ш. Газизова2, Н.А. Нишонов3, С.Н. Маковеев4, И. Кофранек5, Г.В. Шевченко6

research article UDC 616.1 Pages: 5-17 doi.org/10.18127/j15604136-202005-01

  1. 1 к.б.н., вед. науч. сотрудник, лаборатория математического моделирования и мониторинга, ФГБУ «Национальный медицинский исследовательский центр сердечно-сосудистой хирургии имени А. Н. Бакулева» МЗ РФ (Москва)
  2. 2 д.м.н., академик Медико-технической академии, гл. науч. сотрудник, лаборатория математического моделирования и мониторинга ФГБУ «Национальный медицинский исследовательский центр сердечно-сосудистой хирургии имени А. Н. Бакулева» МЗ РФ (Москва)
  3. 3 врач, сердечно-сосудистый хирург, отделение хирургического лечения заболеваний сердца с прогрессирующей легочной гипертензией, ФГБУ «Национальный медицинский исследовательский центр сердечно-сосудистой хирургии имени А. Н. Бакулева» МЗ РФ (Москва)
  4. 4 директор, ТОГБУ «Компьютерный центр» (г. Тамбов)
  5. 5 профессор, Карлов Университет, Институт патофизиологии, Лаборатория биокибернетики (Прага, Чехия)
  6. 6 коммерческий директор, ООО «Открытые Технологии» (Москва)

Abstract

To evaluate hemodynamic parameters such as cardiac and stroke index, pumping ability of the heart, vascular resistance of systemic and pulmonary circulation, etc., it is necessary to measure the volumetric blood flow velocity (cardiac output). Since the 70s of the last century, from the existing methods for evaluating cardiac output as invasive, requiring cardiac catheterization (direct Fick method, Stuart-Hamilton method, thermodilution, etc.) and non-invasive (echocardiographic, rheographic, photoplethysmographic, etc.), the thermodilution method has become the most widespread. At the same time, the method has limitations in use, for example, in children with heart septum defects.

The aim of the work was to determine the advantages and disadvantages of using the thermodilution method to assess the hemodynamics of patients with pulmonary hypertension when performing the pulmonary vasoreactivity testing.

Material and methods of hemodynamic research. The hemodynamics of 96 patients with pulmonary hypertension of various etiology was studied. All patients underwent the pulmonary vasoreactivity testing and underwent complete computer monitoring and analysis using mathematical models and statistics.

Results. The article describes the thermodilution method. An analysis of its applicability and limitations is carried out. It has been established that the measurement of cardiac output by the method of thermodilution is influenced by methodological reasons, such as instability of blood flow, the influence of a respiratory wave, stress, etc., physiological, associated with defects of the heart septum and tricuspid valve, cardiac arrhythmias, disorders associated with catheterization, injection of a solution, etc.

Clinical examples of the application of the method using a mathematical model of the cardiovascular system are given.

Conclusion. The thermodilution method and the equipment for its implementation continue to develop. Half a century of experience in using the thermodilution method in the clinic has determined the boundaries of its application, possible complications and the necessary skills of the specialists using it.

The use of this method is recommended when conducting a test for vasoreactivity in patients with pulmonary hypertension to clarify the diagnosis and choice of therapy. Also, hemodynamic control by the thermodilution method is necessary when prescribing potent drugs to patients with acute heart failure before, during and after cardiac surgery, during resuscitation measures, the selection of surgical tactics for cardiomyopathy and other pathologies, determining indications for heart transplantation, etc.

How to cite

Сазыкина Л.В., Газизова Д.Ш., Нишонов Н.А., Маковеев С.Н., Кофранек И., Шевченко Г.В. Применение метода термодилюции для оценки гемодинамики больных с легочной гипертензией // Биомедицинская радиоэлектроника. 2020. № 5. С. 5–17. DOI: https://doi.org/10.18127/j15604136-202005-01

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