The effects of propofol with and without ketamine on human cerebral blood flow velocity and CO(2) response.
نویسندگان
چکیده
UNLABELLED The combination of propofol and ketamine has been used for total IV anesthesia. This study was designed to clarify the effects of propofol-ketamine anesthesia on cerebral circulation by using transcranial Doppler ultrasonography. In Study 1, we examined the time course of time-mean middle cerebral artery blood flow velocity (Vmca) after ketamine (n = 10) or saline (n = 6) administration during propofol anesthesia. In Study 2, CO(2) responses were measured under the following conditions: awake (Group C, n = 7), propofol anesthesia (Group D, n = 7), and propofol-ketamine anesthesia (Group E, n = 8). Ketamine administration during propofol anesthesia administration did not affect Vmca, mean arterial pressure, or heart rate. Vmca under normocapnia in Groups D and E were 36 +/- 3 and 37 +/- 3 cm/s (mean +/- SE), respectively. The values were significantly lower than that of Group C (70 +/- 3 cm/s). The CO(2) response slopes of Groups D and E were significantly lower than that of Group C, although there was no significant difference between Groups D and E. These results suggest that ketamine does not influence Vmca or the cerebrovascular CO(2) response during propofol anesthesia administration, although the sample size in each group was small. IMPLICATIONS Our study suggests that ketamine does not influence middle cerebral artery blood flow velocity or the cerebrovascular CO(2) response assessed by transcranial Doppler ultrasonography during propofol anesthesia administration in patients without neurological complications.
منابع مشابه
Effect of two Different Concentrations of Propofol and Ketamine Combinations (Ketofol) in Pediatric Patients under Lumbar Puncture or Bone Marrow Aspiration
Abstract Background Ketamine is an anesthetic drug that is importantly analgesic without respiratory depression. Ketamine increases blood pressure and heart rate. Propofol is an anesthetic drug with good sedation, rapid recovery, but it causes respiratory depression, low heart rate and low blood pressure. Combination of Ketamine and Propofol provides sedation, analgesia and rapid recovery wit...
متن کاملA survey of intracranial blood flow velocity in thalassemia intermedia in Khuzestan Province, Iran
Background: Beta-thalassemia intermedia (BTI) is a type of hemoglobinopathy with an increased risk of cerebrovascular accidents, and transcranial cerebral Doppler ultrasonography (TCD) through determining the mean cerebral blood flow velocity (CBFV) can serve to predict the risk of a developing stroke. This study aims to compare patients with beta-thalassemia intermedia and healthy individuals ...
متن کاملI-46: Obstetrical Doppler
Accurate assessment of gestational age, fetal growth, and the detection of fetal and placental abnormalities are major benefits of sonography. Color Doppler can be used to assist in the identification of vascular architecture, detection of vascular pathology and visualization of blood flow changes associated with physiologic processes and disease states. The clinical applications of obstetrical...
متن کاملComparison between the effects of propofol-ketamine and propofol-fentanyl for sedation in cataract surgery
Background and Aim: Considering the importance of proper sedation in cataract surgery, this study was conducted to make a comparison between the effects of ketamine-propofol combination and fentanyl-propofol combination for sedation in phacoemulsification surgery. Methods: In this clinical trial study, 84 patients who were candidates for phacoemulsification cataract surgery were assigned to two...
متن کاملEffects of Combination of Intravenous Anesthetic Agents on Human Glycine Receptor evaluated by Artificial Neural Networks
Introduction: Intravenous general anesthetic agents are among the most important and widely used anesthetic drugs in the clinical practice. Many pharmacological studies have shown that potentiation of GABA and glycine on their receptors is the most plausible mechanism. Nevertheless, there is limited information on the effects of co-administration of two or more of these agents. However, expe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Anesthesia and analgesia
دوره 90 2 شماره
صفحات -
تاریخ انتشار 2000