Obesidad y vía aérea / Obesity and airway management

Abril 19, 2016. No. 2301

Intubación difícil en pacientes obesos: incidencia, factores de riesgo y complicaciones en la sala de operaciones y en la UCI Difficult intubation in obese patients: incidence, risk factors, and complications in the operating theatre and in intensive care units. De Jong A1, Molinari N2, Pouzeratte Y1, Verzilli D1, Chanques G1, Jung B3, Futier E1, Perrigault PF4, Colson P5, Capdevila X6, Jaber S7. Br J Anaesth. 2015 Feb;114(2):297-306. doi: 10.1093/bja/aeu373. Epub 2014 Nov 27. Abstract BACKGROUND: Intubation procedure in obese patients is a challenging issue both in the intensive care unit (ICU) and in the operating theatre (OT). The objectives of the study were (i) to compare the incidence of difficult intubation and (ii) its related complications in obese patients admitted to ICU and OT. METHODS: We conducted a multicentre prospective observational cohort study in ICU and OT in obese (BMI≥30 kg m(-2)) patients. The primary endpoint was the incidence of difficult intubation. Secondary endpoints were the risk factors for difficult intubation, the use of difficult airway management techniques, and severe life-threatening complications related to intubation (death, cardiac arrest, severe hypoxaemia, severe cardiovascular collapse). RESULTS: In cohorts of 1400 and 11 035 consecutive patients intubated in ICU and in the OT, 282 (20%) and 2103 (19%) were obese. In obese patients, the incidence of difficult intubation was twice more frequent in ICU than in the OT (16.3% vs 8.2%, P<0.01). In both cohorts, risk factors for difficult intubation were Mallampati score III/IV, obstructive sleep apnoea syndrome, and reduced mobility of cervical spine, while limited mouth opening, severe hypoxaemia, and coma appeared only in ICU. Specific difficult airway management techniques were used in 66 (36%) cases of difficult intubation in obese patients in the OT and in 10 (22%) cases in ICU (P=0.04). Severe life-threatening complications were significantly more frequent in ICU than in the OT (41.1% vs 1.9%, relative risk 21.6, 95% confidence interval 15.4-30.3, P<0.01). CONCLUSIONS: In obese patients, the incidence of difficult intubation was twice more frequent in ICU than in the OT and severe life-threatening complications related to intubation occurred 20-fold more often in ICU. PDF Problemas de manejo de la vía aérea en pacientes con procedimientos de banda gástrica Airway management concerns in patient with gastric banding procedures. Koolwijk J1, Schors M, el Bouazati S, Noordergraaf GJ. BMJ Case Rep. 2013 Sep 19;2013. pii: bcr2013201009. doi: 10.1136/bcr-2013-201009. Abstract Laparoscopic adjustable gastric band (LAGB) is considered a relatively safe and effective treatment for obesity. Even after weight loss patients with LAGB are at increased risk of pulmonary aspiration during induction of general anaesthesia, possibly due to LAGB-induced anatomical and functional changes. We present a case of aspiration in a patient with LAGB following significant weight loss and 14 h of preoperative fasting and review the literature. In the presence of LAGB we propose specific anaesthesia management at least consisting of anti-Trendelenburg positioning; avoidance of mask-ventilation; use of the local rapid sequence induction strategy with endotracheal intubation and fully awake extubation. PDF Manejo de la vía aérea en el obeso Airway management in obese patient. Langeron O1, Birenbaum A, Le Saché F, Raux M. Minerva Anestesiol. 2014 Mar;80(3):382-92. Epub 2013 Oct 14. Abstract Oxygenation maintenance is the cornerstone of airway management in the obese patient related to anatomic and pathophysiologic issues. Difficult mask ventilation (DMV) risk is increased in obese patients according recognized predictors (Body Mass Index [BMI]>26 kg/m2, age >55 years, jaw protrusion severely limited, lack of teeth, snoring, beard, Mallampati class III or IV) and should systematically search. Difficult tracheal intubation(DTI) risk may be increased and risk should be assessed in a careful manner. Increased neck circumference and high BMI (>35 kg/m2) should be added to "standard" preoperative airway assessment including:Mallampati class, mouth opening and thyromental distance. In obese patients, preoxygenation is mandatory by 25° head-up position achieving better gas exchange than in supine position. In addition, to prevent early arterial oxygen desaturation related to a reduced functional residual capacity (FRC), atelectasis formation during anesthetic induction and after trachealintubation, non invasive positive pressure ventilation and application of PEEP throughout this period are recommended. Airway management inobese patients has to consider: the anesthesia technique with maintenance or not of spontaneous ventilation, the available oxygenation technique in case of anticipated DMV, and the appropriate tracheal intubation technique (fiberoptic intubation technique or videolaryngoscope) according to the patient status and will. In unexpected difficult airway, the very first priority is oxygenation and a predefined strategy has to be implemented with oxygenation devices first (supraglottic devices or ILMA). Lastly, the final step of the obese airway management is tracheal extubation and recovery. A strategy with a fully awake patient, without residual paralysis, and a 25° head-up position is mandatory. PDF Committee for European Education in Anaesthesiology (CEEA) Colegio de Anestesiólogos de León AC MÓDULO V: Sistema nervioso, fisiología, anestesia locoregional y dolor. Reconocimientos de: CEEA, CLASA, Consejo Nacional Mexicano de Anestesiología.   En la Ciudad de Léon, Guanajuato. México del 6 al 8 de Mayo, 2016. Informes en el tel (477) 716 06 16 y con el Dr. Enrique Hernández kikinhedz@gmail.com

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Vía aérea en obstetricia / Obstetric airway

Abril 28, 2016. No. 2310

Intubación traqueal fallida durante anestesia general obstétrica: Revisión de la literatura Failed tracheal intubation during obstetric general anaesthesia: a literature review. Kinsella SM1, Winton AL2, Mushambi MC3, Ramaswamy K4, Swales H5, Quinn AC6, Popat M7. Int J Obstet Anesth. 2015 Nov;24(4):356-74. doi: 10.1016/j.ijoa.2015.06.008. Epub 2015 Jun 30. Abstract We reviewed the literature on obstetric failed tracheal intubation from 1970 onwards. The incidence remained unchanged over the period at 2.6 (95% CI 2.0 to 3.2) per 1000 anaesthetics (1 in 390) for obstetric general anaesthesia and 2.3 (95% CI 1.7 to 2.9) per 1000 general anaesthetics (1 in 443) for caesarean section. Maternal mortality from failed intubation was 2.3 (95% CI 0.3 to 8.2) per 100000 general anaesthetics for caesarean section (one death per 90 failed intubations). Maternal deaths occurred from aspiration or hypoxaemia secondary to airway obstruction or oesophageal intubation. There were 3.4 (95% CI 0.7 to 9.9) front-of-neck airway access procedures (surgical airway) per 100000 general anaesthetics for caesarean section (one procedure per 60 failed intubations), usually carried out as a late rescue attempt with poor maternal outcomes. Before the late 1990s, most cases were awakened after failed intubation; since the late 1990s, general anaesthesia has been continued in the majority of cases. When general anaesthesia was continued, a laryngeal mask was usually used but with a trend towards use of a second-generation supraglottic airway device. A prospective study of obstetric general anaesthesia found that transient maternal hypoxaemia occurred in over two-thirds of cases of failed intubation, usually without sequelae. Pulmonary aspiration occurred in 8% but the rate of maternal intensive care unit admission after failed intubation was the same as that after uneventful general anaesthesia. Poor neonatal outcomes were often associated with preoperative fetal compromise, although failed intubation and lowest maternal oxygen saturation were independent predictors of neonatal intensive care unit admission. PDF Committee for European Education in Anaesthesiology (CEEA) Colegio de Anestesiólogos de León AC MÓDULO V: Sistema nervioso, fisiología, anestesia locoregional y dolor. Reconocimientos de: CEEA, CLASA, Consejo Nacional Mexicano de Anestesiología.   En la Ciudad de Léon, Guanajuato. México del 6 al 8 de Mayo, 2016. Informes en el tel (477) 716 06 16 y con el Dr. Enrique Hernández kikinhedz@gmail.com

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Analgesia peridural torácica y pancreatitis / Thoracic epidural analgesia and pancreatitis

Mayo 12, 2016. No. 2324

Analgesia epidural torácica; Un abordaje nuevo para el tratamiento de pancreatitis aguda Thoracic epidural analgesia: a new approach for the treatment of acute pancreatitis? Windisch O1, Heidegger CP2, Giraud R2, Morel P3, Bühler L3. Crit Care. 2016 May 4;20(1):116. doi: 10.1186/s13054-016-1292-7. Abstract This review article analyzes, through a nonsystematic approach, the pathophysiology of acute pancreatitis (AP) with a focus on the effects of thoracic epidural analgesia (TEA) on the disease. The benefit-risk balance is also discussed. AP has an overall mortality of 1 %, increasing to 30 % in its severe form. The systemic inflammation induces a strong activation of the sympathetic system, with a decrease in the blood flow supply to the gastrointestinal system that can lead to the development of pancreatic necrosis. The current treatment for severe AP is symptomatic and tries to correct the systemic inflammatory response syndrome or the multiorgan dysfunction. Besides the removal of gallstones in biliary pancreatitis, no satisfactory causal treatment exists. TEA is widely used, mainly for its analgesic effect. TEA also induces a targeted sympathectomy in the anesthetized region, which results in splanchnic vasodilatation and an improvement in local microcirculation. Increasing evidence shows benefits of TEA in animal AP: improved splanchnic and pancreatic perfusion, improved pancreatic microcirculation, reduced liver damage, and significantly reduced mortality. Until now, only few clinical studies have been performed on the use of TEA during AP with few available data regarding the effect of TEA on the splanchnic perfusion. Increasing evidence suggests that TEA is a safe procedure and could appear as a new treatment approach for human AP, based on the significant benefits observed in animal studies and safety of use for human. Further clinical studies are required to confirm the clinical benefits observed in animal studies. KEYWORDS: Acute pancreatitis; Microcirculation; Mortality; Pancreas necrosis; Splanchnic perfusion; Thoracic epidural analgesia/anesthesia PDF VIII Foro Internacional de Medicina del Dolor y Paliativa  Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Junio 9-11, Ciudad de México Dra. Argelia Lara Solares Tel. 5513 3782  www.dolorypaliativos.org

Anestesiología y Medicina del Dolor 52 664 6848905 vwhizar@anestesia-dolor.org anestesia-dolor.org Copyright © 2015