Critical closing pressure in cerebrovascular circulation.

Asymmetry of critical closing pressure following head injury.

OBJECTIVE Critical closing pressure (CCP) is the arterial pressure below which the vessels collapse. Hypothetically it is the sum of intracranial pressure (ICP) and vessel wall tension in the cerebral circulation. This study investigated transhemispherical asymmetry of CCP by studying its correlation with radiological findings on computed tomography (CT) scans in head injury patients. METHOD ...

Some Observations of Critical Closing Pressures in the Peripheral Circulation of Anaesthetized Patients.

Critical closing pressures have been measured in the hand vessels of anaesthetized patients undergoing elective surgery by a method as close as possible to that used in previous studies on conscious subjects. The critical closing pressure has been found to vary considerably during anaesthesia. In general, the variations are parallel to those of the systolic blood pressure. No correlation has be...

CALL FOR PAPERS Cardiovascular and Cerebrovascular Aging–New Mechanisms and Insights Assessing cerebrovascular autoregulation from critical closing pressure and resistance area product during upright posture in aging and hypertension

Robertson AD, Edgell H, Hughson RL. Assessing cerebrovascular autoregulation from critical closing pressure and resistance area product during upright posture in aging and hypertension. Am J Physiol Heart Circ Physiol 307: H124–H133, 2014. First published May 23, 2014; doi:10.1152/ajpheart.00086.2014.—Static cerebral autoregulation (sCA) is believed to be resistant to aging and hypertensive pat...

Critical closing pressure of vessels supplying the capillary loops of the nailfold.

Critical closing pressure explains cerebral hemodynamics during the Valsalva maneuver.

The Valsalva maneuver (VM), a voluntary increase in intrathoracic pressure of approximately 40 mmHg, has been used to examine cerebral autoregulation (CA). During phase IV of the VM there are pronounced changes in mean arterial blood pressure (MABP), pulse interval, and cerebral blood flow (CBF), but the changes in CBF are of a much greater magnitude than those seen in MABP, a finding to date a...