Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Beat-to-beat changes in stroke volume precede the general circulatory effects of mechanical ventilation: a case report. | Available online http content 5 1 041 Primary research Beat-to-beat changes in stroke volume precede the general circulatory effects of mechanical ventilation a case report Nina Nelson and Birgitta Janerot-Sjoberg Department of Health and Environment Division of Pediatrics University Hospital Linkoping Sweden Department of Medicine and Care Division of Clinical Physiology University Hospital Linkoping Sweden Correspondence Nina Nelson MD PhD Department of Health and Environment Division of Pediatrics Faculty of Health Sciences University Hospital SE-581 85 Linkoping Sweden. Tel 4613 222000 fax 4613 148265 e-mail Received 11 September 2000 Revisions requested 14 November 2000 Revisions received 28 November 2000 Accepted 3 December 2000 Published 5 January 2001 Critical Care 2001 5 41-45 2001 Nelson and Janerot-Sjoberg licensee BioMed Central Ltd Print ISSN 1364-8535 Online ISSN 1466-609X Abstract Background The haemodynamic as well as the ventilatory consequences of mechanical ventilation can be harmful in critically ill neonates. Newly developed ventilatory lung protective strategies are not always available immediately and in an acute situation the haemodynamic changes caused by mechanical ventilation can affect the oxygen delivery considerably. We report the case of a male neonate who was treated with conventional pressure-controlled mechanical ventilation because of respiratory distress and progressive respiratory acidosis resulting from meconium aspiration. Because of poor arterial oxygenation despite 100 inspired oxygen and increased ventilator settings echocardiography was performed to exclude central haemodynamic reasons for low oxygen delivery. Method Doppler echocardiography was used for the measurement of stroke volume and cardiac output. Pulse oximetry and aortic blood pressure were monitored continuously. Results Echocardiography revealed no cardiac malformations or signs of persistent fetal circulation. When inspiratory .
