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British Journal of Anaesthesia, 2003, Vol. 90, No. 3 396-397
© 2003 The Board of Management and Trustees of the British Journal of Anaesthesia

Correspondence

Estimation of critical closing pressure and cerebral perfusion pressure using transcranial Doppler

L. A. Steiner1, M. Czosnyka1, R. Sherman2 and R. P. Mahajan2

1 Cambridge, UK 2 Nottingham, UK

The first 10% of the full text of this article appears below.

Editor—We read with interest the article by Sherman and colleagues.1 We would like to comment on the methods used to estimate critical closing pressure and cerebral perfusion pressure.

The formula used to calculate critical closing pressure in this article omits the influence of cerebrovascular wall tension. It actually equates critical closing pressure with intracranial pressure. As shown earlier, critical closing pressure consists not only of intracranial pressure but also of a factor representing arterial vascular wall tension.2 Moreover, the method used to calculate critical closing pressure can . . . [Full Text of this Article]


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