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Evaluation of Cerebrovascular Carbon Dioxide Reactivity in Patients with Diabetes Mellitus Under Sedative Doses of Propofol

Overview
Journal J Anesth
Specialty Anesthesiology
Date 2008 Nov 18
PMID 19011782
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Abstract

The present study compared cerebrovascular CO2 reactivity in diabetic patients on different treatment modalities under sedative doses of propofol. Fifteen patients with diabetes mellitus (on three different antidiabetic treatment modalities) who required mechanical ventilation during intensive care therapy were studied, sedation during mechanical ventilation being maintained using propofol. As controls, 6 patients without diabetes were monitored. A 2.5-MHz pulsed transcranial Doppler probe was attached to the head of the patient at the right temporal window for continuous measurement of mean blood flow velocity in the middle cerebral artery (Vmca). After establishing baseline values of Vmca and cardiovascular hemodynamics, end-tidal CO2 was decreased by increasing ventilatory frequency by 5-8 breaths.min(-1). Values for absolute and relative CO2 reactivity in insulintreated patients were lower than those in the other three groups (absolute CO2 reactivity [means +/- SD]: control, 3.1 +/- 0.6 cm.s(-1).mmHg(-1), diet, 3.8 +/- 1.4 cm.s(-1) x mmHg(-1); oral antidiabetic drug 3.2 +/- 0.9 cm x s(-1) x mmHg(-1); insulin, 1.1 +/- 0.6 cm x s(-1) x mmHg(-1); P = 0.002).The present study shows that insulin-treated diabetic patients probably have lower cerebrovascular CO2 reactivity under propofol anesthesia than control patients or diabetics treated with dietary therapy or oral hypoglycemics.

References
1.
Steiner L, Johnston A, Chatfield D, Czosnyka M, Coleman M, Coles J . The effects of large-dose propofol on cerebrovascular pressure autoregulation in head-injured patients. Anesth Analg. 2003; 97(2):572-576. DOI: 10.1213/01.ANE.0000070234.17226.B0. View

2.
Kadoi Y, Saito S, Takahashi K . The comparative effects of sevoflurane vs. isoflurane on cerebrovascular carbon dioxide reactivity in patients with hypertension. Acta Anaesthesiol Scand. 2007; 51(10):1382-7. DOI: 10.1111/j.1399-6576.2007.01422.x. View

3.
Conti A, Iacopino D, Fodale V, Micalizzi S, Penna O, Santamaria L . Cerebral haemodynamic changes during propofol-remifentanil or sevoflurane anaesthesia: transcranial Doppler study under bispectral index monitoring. Br J Anaesth. 2006; 97(3):333-9. DOI: 10.1093/bja/ael169. View

4.
Strebel S, Kindler C, Bissonnette B, Tschaler G, Deanovic D . The impact of systemic vasoconstrictors on the cerebral circulation of anesthetized patients. Anesthesiology. 1998; 89(1):67-72. DOI: 10.1097/00000542-199807000-00012. View

5.
Kadoi Y, Hinohara H, Kunimoto F, Saito S, Ide M, Hiraoka H . Diabetic patients have an impaired cerebral vasodilatory response to hypercapnia under propofol anesthesia. Stroke. 2003; 34(10):2399-403. DOI: 10.1161/01.STR.0000090471.28672.65. View