Persistent hypoxemia and platypnea-orthodeoxia after left single-lung transplantation: a case reportReportar como inadecuado




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Journal of Medical Case Reports

, 9:138

First Online: 12 June 2015Received: 23 December 2014Accepted: 24 April 2015DOI: 10.1186-s13256-015-0598-4

Cite this article as: Salim, H., Melendez, J. & Seethamraju, H. J Med Case Reports 2015 9: 138. doi:10.1186-s13256-015-0598-4

Abstract

IntroductionPlatypnea-orthodeoxia is a relatively uncommon but striking clinical syndrome characterized by dyspnea and deoxygenation accompanying a change to sitting or standing from a recumbent position. Hypoxemia early after lung transplant can have multiple etiologies. We report a rare case of persistent hypoxemia and platypnea-orthodeoxia after left single-lung transplantation, as a result of right-to-left interatrial shunt through a patent foramen ovale, with subsequent resolution of hypoxemia after percutaneous closure of the patent foramen ovale.

Case presentationOur 66-year-old Caucasian male patient exhibited a persistent patent foramen ovale. Persistent patent foramen ovale produces an intermittent intra-atrial right-to-left shunt and occurs in approximately 25 % of the general population. Although the majority of people with patent foramen ovale are asymptomatic, it is believed to act as a pathway for chemicals or thrombi that can result in a variety of clinical manifestations, including stroke, migraine headache, decompression sickness, high-altitude pulmonary edema, and platypnea-orthodeoxia syndrome. Percutaneous closure of the patent foramen ovale has been shown to be effective in the case of right-to-left shunting with normal pulmonary arterial pressure, but the indication remains controversial in other situations where pulmonary pressures are not normal. The most common causes of hypoxemia immediately after lung transplant include: graft dysfunction, reperfusion injury, acute thromboembolic disease, and acute rejection. We report a case of reopening of a patent foramen ovale after left single-lung transplantation with normal pulmonary pressure.

ConclusionsOur case demonstrates that an open patent foramen ovale leading to massive right-to-left shunting is a possible complication after lung transplant, with significant morbidity, and that it can be treated successfully using a percutaneously placed occlusion device. Through this case report, we aim to improve pre-transplant procedures by demonstrating that a bubble contrast transesophageal echocardiogram can be performed pre-operatively to detect a patent foramen ovale.

AbbreviationsCTComputed tomography

PaCO2Partial pressure of carbon dioxide

PaO2Partial pressure of oxygen

PFOPatent foramen ovale

PODPost-operative day

TTETransthoracic echocardiogram

V-QVentilation-perfusion

Jose Melendez and Harish Seethamraju are equally contributed to this work.

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Autor: Hamza Salim - Jose Melendez - Harish Seethamraju

Fuente: https://link.springer.com/







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