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J Thorac Cardiovasc Surg 2007;134:545
© 2007 The American Association for Thoracic Surgery
Letter to the Editor |
Department of Cardiovascular Surgery, Saiseikai Utsunomiya Hospital, Tochigi, Japan
To the Editor:
We read with great interest the article by Reece and coworkers1
on central cannulation for acute aortic dissection. We have also experienced the safety and the advantages of this technique, which we have routinely applied to 37 patients.2
The authors limited the application of this technique to one third of their patients. However, we think it could be routinely applied for type A dissection, as far as true channel antegrade perfusion is firmly established. There seem to be three prerequisites to establish reliable true channel perfusion invariably: safe cannulation, confirmation of true channel cannulation, and confirmation of antegrade true lumen perfusion.
First, safe cannulation with the Seldinger technique requires decompression of the cannulation site in advance, which could be induced pharmacologically, by insertion of femoral inflow, or by blood drainage from right atrial cannulation. In addition, a thin-walled flexible cannula with a spindle-shaped obturator and tapered dilators is indispensable.
Second, epiaortic ultrasound imaging helps to confirm the position of the tip of the cannula within the true lumen of the proximal arch. Epiaortic ultrasound provides more detailed information on the ascending aorta and proximal arch than does transesophageal echocardiography.3
Third, epiaortic color Doppler imaging provides real-time direct information on dynamic flow inside the false and true channels, which is effective for the assessment of antegrade perfusion via true lumen.
We congratulate Reece and colleagues on their outstanding results.
References
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Y. Inoue Reply to the editor. J. Thorac. Cardiovasc. Surg., August 1, 2011; 142(2): 480 - 480. [Full Text] [PDF] |
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