40 research outputs found
The principles of the electrostatic carding : an analysis of the fibre motion in a uniform electrostatic field /
No full textA fundamental investigation of the formation and properties of the ideal fibre opening and mixing by using electrostatic means /
No full text1. : Ideal mixing theory. Experimental part2. : Ideal mixing theory. Part B'3. : Ideal mixing theory4. : Some useful bibliography related to P.h.D. researc
Recovery and cognitive function after fentanyl or remifentanil administration for carotid endarterectomy
No full textStudy Objective: To compare recovery and restoration of cognitive function after fentanyl-propofol or remifentanil-propofol anesthesia administration in patients undergoing carotid endarterectomy. Design: Randomized, double-blind, prospective study. Setting: Department of Anesthesiology, University hospital. Patients: Seventy patients with ASA physical statuses II and III (53 men and 17 women) undergoing elective carotid endarterectomy. Interventions: Anesthetic technique and drugs were identical in the 2 groups, with the exception of remifentanil and fentanyl administration. Induction of anesthesia was obtained with a bolus dose of propofol (1-2 mg/kg), maintenance was achieved with a propofol infusion according to hemodynamics and nitrous oxide/oxygen (FIO2, 0.50). Muscle relaxation was achieved with rocuronium. The remifentanil group received I mu g/kg of remifentanil as a single dose during the-induction of anesthesia and 0.5 mu g/kg per minute as an infusion throughout the procedure. The fentanyl group received 2 mu g/kg of fentanyl as a single dose during the induction of anesthesia. Measurements: Intraoperative hemodynamic adverse events were recorded. All patients were also evaluated with regard to their recovery and the restoration of their cognitive function, recording the immediate recovery times and using the Aldrete score 15 and 60 minutes after surgery and the Hasegawa scale 6 hours after surgery. For evaluation of postoperative pain, the Numeric Pain Scale (0-10) was used. Main Results: Patients receiving remifentanil had significantly (P <.05) fewer episodes of intraoperative hypertension and needed nitroglycerine administration less frequently (P <.05) than those receiving fentanyl. Immediate recovery was significantly earlier (P <.05) with remifentanil (eye opening, 5.1 +/- 1.3 [remifentanil] and 7.2 +/- 3.7 [fentanyl] minutes; extubation time, 5.4 +/- 1.9 [remifentanil] and 7.8 +/- 4.1 [fentanyl] minutes). The Hasegawa Dementia Scale scores 6 hours after surgery and Aldrete scores 15 and 60 minutes after surgery did not differ significantly between the 2 groups. Pain levels were also similar for patients taking remifentanil and fentanyl. Conclusions: Although intraoperative hemodynamics were better preserved and immediate recovery was more rapid with remifentanil, overall postoperative recovery and restoration of cognitive functions as well as postoperative pain intensity seem to be similar for patients receiving remifentanil and for those receiving fentanyl combined with propofol for carotid endarterectomy operations. (c) 2005 Elsevier Inc. All rights reserved
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Pre-oxygenation enhances induction with sevoflurane as assessed using bispectral index monitoring
No full textPre-oxygenation enhances induction with sevoflurane as assessed using bispectral index monitoring
No full textSeveral methods may enhance the inhalational induction of anesthesia. In this randomized double-blind study, we evaluated the speed of induction of anesthesia with sevoflurane with or without pre-oxygenation. Fifty-four patients scheduled for hysteroscopy received for 10 min air or 100% oxygen via a facemask followed by >= 7% sevoflurane in 100% oxygen. During the first 300 s of sevoflurane administration, bispectral index (BIS) values were recorded every 30 s in all patients. In 14 patients, seven in each group, BIS, endtidal CO2, tidal volume, respiratory rate, SpO(2), and heart rate were recorded every minute during the pre-induction period and every 30 s during the first 5 min of sevoflurane administration. The BIS, endtidal CO2, tidal volume and respiratory rate did not differ between the oxygen or air breathing groups (P = 0.696, P = 0.999, P = 0.388, and P = 0.875, respectively), though the oxygen group exhibited lower tidal volumes by 16-20%. The SpO(2) and heart rates were higher in the oxygen breathing group (P < 0.001 and P = 0.042, respectively). During sevoflurane administration, BIS values were lower in the oxygen group vs. the group breathing air, in particular at 90, 120, 150, 180 and 210 s (P = 0.001, P = 0.001, P = 0.001, P = 0.001 and P = 0.030, respectively). The endtidal CO2 and the tidal volumes between the groups did not differ. The two groups differed in the SpO(2) and the heart rates during induction (P = 0.004 and 0.003, respectively). Before sevoflurane administration, breathing 100% oxygen for 10 min enhances induction of anesthesia with sevoflurane
Anaesthesia preference, neuraxial vs general, and outcome after caesarean section
No full textWe investigated parturients' preference for neuraxial vs general anaesthesia, while they have experienced both techniques in the past. A total of 102 parturients who underwent elective caesarean section under general or neuraxial anaesthesia at different times completed a questionnaire comparing the two techniques. According to our results, 98% vs 51% (p<0.001) of the women saw the baby and 51% vs 29% (p0.003) ambulated in the neuraxial and general anaesthesia groups, respectively, within the first 24h postoperatively. Neuraxial anaesthesia was associated with less pain assessed by the Verbal Analogue Scale VAS (54±21 vs 72±20 p<0.001), fewer days of hospital stay (4±0.5 vs 5±1.5, p0.001) and higher satisfaction scores (77±18 vs 52±24, p0.001) vs general anaesthesia. Finally, 80 of the women would choose neuraxial anaesthesia for a future caesarean section. © 2010 Informa UK, Ltd
Simultaneous open abdominal aortic aneurysm repair and typical right hepatectomy due to hydatid liver disease: A case report
No full textIntra-articular morphine enhances analgesic efficacy of ropivacaine for knee arthroscopy in ambulatory patients
No full textThe aim of this double-blind, randomized control trial was to compare the effectiveness of intra-articular ropivacaine alone or with morphine or ketoprofen for controlling pain after arthroscopic knee surgery. One hundred fifty-six patients scheduled for elective knee arthroscopy were recruited. All patients received general anesthesia and were randomly assigned to 4 groups to receive intraropivacaine 40 mg (group R), ropivacaine 24 mg plus morphine 8 mg (group R+M), ropivacaine 36 mg plus ketoprofen 100 mg (group R+K), or normal saline (group N/S). Pain, sedation, orientation, nausea, vomiting, and urine retention were recorded at 0, 1, 2, 4, 8, 12, and 24 hours postoperatively. Pain was evaluated by a 10-cm visual analog scale (VAS). When the pain was >2, a suppository of 400 paracetamol plus 10 mg codeine plus 50 mg caffeine was given. Results showed that at 4 hours postoperatively, pain differed significantly among the 4 groups (P<.001), with less pain recorded in the R+M group. Similarly, the number of suppositories administered postoperatively to the R+M group was significantly less (P<.001) vs the other groups. Patients who received ropivacaine and morphine or normal saline had a higher incidence of nausea and vomiting vs the other groups (P=.001 and P=.036, respectively). The combination of intra-articular ropivacaine and morphine is associated with less pain after knee arthroscopy during early recovery but with a higher incidence of nausea and vomiting. However, the addition of ketoprofen to ropivacaine provides relatively satisfactory pain relief, but with fewer side effects compared to morphine
