[Interest of entropy monitoring during low-grade cerebral aneurysm embolisation]. / Intérêt du monitorage de la profondeur d'anesthésie par entropie pour l'embolisation d'anévrismes intracrâniens de bas grade.

OBJECTIVE: Evaluate the use of entropy monitoring on anaesthetic drugs consumption, haemodynamic stability, and recovery time in patients undergoing embolisation of cerebral artery aneurysm (asymptomatic or low Hunt and Hess grades). METHODS: Two groups, G1 without entropy monitoring (Datex-Ohmeda S/5), G2 with entropy monitoring (16 patients in each group). Each group had similar anaesthetic protocol (propofol target control infusion and continuous intravenous infusion remifentanil). For G2, the state entropy (SE) values were kept between 35 and 45. We studied anaesthetic drug consumption, arterial pressure parameters, extubation delay and feasibility. Statistical analysis used Mann and Whitney test, Fisher test. Significativity was p<0.05. RESULTS: No intraoperative incident. Propofol consumption was lower in G2 (7.49+/-2.28 mg/kg per hour versus 9.46+/-2.50mg/kg per hour; p<0.05). A tendency to reduction was observed for remifentanil consumption (6.65+/-2.04 microg/kg per hour versus 7.94+/-2.92 microg/kg per hour; p=0.056), and extubation delay (14.1+/-8.6 min versus 26.5+/-22.0 min; p=0.056), in G2. The entropy monitoring had no repercussion on haemodynamic stability, but the arterial pressure values were significantly higher in G2 (73.60+/-8.49 mmHg versus 67.10+/-5.58 mmHg). Entropy captor does not disrupt embolisation procedure. Coils liberation alter temporarily RE and SE values.

[Anesthesia for video-assisted surgery of the thoracic and lumbar spine: a survey of 44 patients]. / Anesthésie pour chirurgie vidéoassistée du rachis thoracolombaire.

INTRODUCTION: The development of video-assisted surgery of the dorsolumbar spine has led to the need for adaptations for appropriate anesthetic management. Data concerning anesthesia for such surgery is very sparse in the literature. AIM OF THE STUDY: The aim of this retrospective study of 44 patients was to learn more about anesthesia practices used for patients undergoing this type of surgery. PATIENTS AND METHOD: The files of 44 patients were studied retrospectively. Epidemiologic data and the perioperative phase were analysed. RESULTS: The preoperative phase was not specific with preoperative assessment adapted to each patient. Similarly, monitoring practices during the surgical procedure were not specific. The choice of the anesthetic agents depended on the patient's clinical status. For tracheal intubation, care was taken to enable lung exclusion, even if not often used. Thoracic drainage at the end of the surgery was required in the event of imperfect hemostasis and in selected patients was replaced by pneumothorax exsufflation during closure. The postoperative period was uneventful and did not require admission to intensive care; non-specific analgesia was used. DISCUSSION: Adaptations of anesthetic practices are required each time a new surgical technique is developed. Excepting lung exclusion, anesthesia for video-assisted dorsolumbar spine surgery is not specific.

[Risk assessment before non-cardiac surgery: what do anesthesiologists expect from cardiologists?]. / Evaluation du risque cardiologique en vue d'une anesthésie pour une chirurgie non cardiaque: qu'attend le médecin anesthésiste-réanimateur de la consultation spécialisée auprès d'un cardiologue?

Patients with a cardiac pathology are at high risk of perioperative cardiac complications. Therefore, an evaluation of the cardiac risk before a non-cardiac surgery has to be performed. The importance of the risk depends on the type of surgery, the patient's clinical symptoms and his adaptation to a physical effort. Exams are chosen according to the pathology, the information searched for and should be non invasive. After the evaluation, a specific preparation of the patient and the institution or an adaptation of cardioprotective medications should be discussed. The cardiologic consultation also allows a better management of antithrombotic or antiplatelet therapy. Preoperative evaluation of the cardiac risk is based on the collaboration between cardiologist and anesthesiologist to select the patients to evaluate, optimize their management, and decrease the risk of complications.

[Anesthesia in surgery for malformative and degenerative cervical spine]. / Anesthésie pour chirurgie du rachis cervical malformatif et dégénératif.

Anaesthesia in patients with malformative and degenerative abnormalities of cervical spine poses a number of specific problems. A crucial point is the indispensable evaluation and observation before and during anaesthesia. Somatosensory evoked potentials being used to monitor nervous system pathways at risk during surgical procedures the effect of anaesthetic agents on these parameters are to be well known. Some pathologies are liable to per and postoperative specific risks breeding complications.

[Anesthesia for surgery of degenerative and abnormal cervical spine]. / Anesthésie pour chirurgie du rachis cervical dégénératif et malformatif.

A feature common to all congenital or inflammatory abnormalities of the cervical spine is an actual or potential reduction in the lumen of the spinal canal. The spinal cord and nerve roots are at risk. During intubation, and positioning the patient on the table, all untoward movements of the cervical spine may lead to spinal cord compression. Abnormalities of the cervical spine carry the risk of a difficult intubation. If there is much debate as to what constitutes optimum management of the airway, there is no evidence that any one method is the best. Recognizing the possible instability and intubating with care, are probably much more important in preserving neurological function than any particular mode of intubation. During maintenance of anaesthesia, the main goal is to preserve adequate spinal cord perfusion in order to prevent further damage. Spinal cord blood flow seems to be regulated by the same factors as cerebral blood flow. Hypercapnia increases cord blood flow while hypocapnia decreases it. Therefore, normocapnia or mild hypocapnia is recommended. Induced hypotension is frequently used to decrease blood loss. However, in patients with a marginally perfused spinal cord, the reduction in blood flow may cause ischaemia of the spinal cord and may therefore be relatively contraindicated. In addition to standard intraoperative monitoring, spinal cord monitoring is almost mandatory. Monitoring somatosensory evoked potentials is used routinely. However, the major limitation is that this technique only monitors dorsal column function; theoretically, motor paralysis can occur despite a lack of change in recorded signals. Neurogenic motor evoked potentials may now be used to monitor anterior spinal cord integrity.(ABSTRACT TRUNCATED AT 250 WORDS)