Acta neurochirurgica. Supplement
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Acta Neurochir. Suppl. · Jan 2002
Effects of positive end-expiratory pressure on intracranial pressure and cerebral perfusion pressure.
The effect of positive end-expiratory pressure (PEEP) on intracranial pressure (ICP) and cerebral perfusion pressure (CPP) has been reported by several investigators, without any consensus being reached. Acute neurological and neurosurgical patients suffer intracranial hypertension and acute lung injury with hypoxemia. Since PEEP may improve hypoxemia but elevate ICP and decrease CPP, it is important to determine the influence of varying levels of PEEP on ICP and CPP. ⋯ PEEP was raised from 5 (basal) to 15 cm H2O in steps of 5 cm H2O. After at least 10 minutes of each new PEEP setting, ICP and CPP were measured. PEEP at 10 and 15 cm H2O produced a significant (p < 0.05) increase in intracranial pressure 11.6 +/- 5.6 and 14.6 +/- 6.28 mm Hg, respectively; no significant (p = 0.819) change occurred in CPP.
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Disturbed cerebral autoregulation is believed to be associated with an unfavourable outcome following head injury. Previously, using ICP monitoring and transcranial Doppler ultrasonography, we investigated whether cerebral response to spontaneous variations in arterial pressure (ABP) or cerebral perfusion pressure (CPP) provide reliable information on cerebral autoregulatory reserve. In the present study we have correlated these methods with clinical findings. ⋯ Positive values of indices of autoregulation, expressing positive association between slow waves of CPP and blood flow velocity or ABP and ICP, indicate disturbed autoregulation. These indices correlate with unfavourable outcome following head injury and should be used to guide intensive therapy.
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Acta Neurochir. Suppl. · Jan 2002
Neuro-rehabilitation--a challenge for neurosurgeons in the century 21st concepts and visions of the WFNS-Committee on neurosurgical rehabilitation.
Patients with severe brain, spinal cord and peripheral nerve lesions today survive surgery. This, however, is quite often achieved at the burden of disabilities. Neuro-rehabilitation could improve significantly patient's quality of life (QoL). ⋯ The WFNS Committee can influence neurosurgeons to take over the challenge of neuro-rehabilitation to improve patient's outcome in respect to ICIDH-2 WHO classification. Delegates of all neurosurgical societies are kindly invited to join us.
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Acta Neurochir. Suppl. · Jan 2002
Comparative Study Clinical Trial Controlled Clinical TrialICP is lower during propofol anaesthesia compared to isoflurane and sevoflurane.
Propofol is a cerebral vasoconstrictor while inhalation anaesthetics like isoflurane and sevoflurane act as cerebral vasodilators in both animal and human studies. This difference of action upon cerebral vessels might implicate a lower ICP during propofol anaesthesia. Cerebral metabolism is decreased by all three anaesthetics. In a prospective, randomised multicenter study ICP was compared during anaesthesia with propofol, isoflurane and sevoflurane. ⋯ Subdural ICP is significantly lower during propofol anaesthesia compared to isoflurane and sevoflurane anaesthesia. CPP and AVDO2 are significantly higher during propofol anaesthesia compared to isoflurane and sevoflurane anaesthesia.