BACKGROUND: Ohtahara syndrome is a progressive developmental and epileptic encephalopathy that manifests in the early infantile period. This rare condition is characterized by intractable seizures, psychomotor retardation, and poor prognosis. To date, there are a handful of case reports regarding the anesthetic management of children with Ohtahara syndrome. However, limited reports exist of patients with Ohtahara syndrome who present with difficult airways. This report describes our airway findings and general anesthetic management of a pediatric patient with Ohtahara syndrome undergoing diagnostic bronchoscopy for severe inspiratory stridor.
METHODS: A 14-month-old, 9 kg, male patient with Ohtahara syndrome presented with a year-long history of severe inspiratory stridor and was scheduled for bronchoscopy with lavage. On exam, the patient had noisy breathing, was non-verbal with developmental delay, and had poor head control with significant central hypotonia. The patient was induced with ketamine and general anesthesia was maintained with propofol. Bronchoscopic evaluation was completed uneventfully and revealed a diagnosis of laryngotracheomalacia. The patient\'s breathing was maintained spontaneously throughout the procedure and no seizures were noted. In the post anesthesia care unit, the patient\'s respiratory and cardiovascular function were stable.
CONCLUSIONS: This report documents the unusual finding of severe inspiratory stridor in a 14-month-old child diagnosed with Ohtahara syndrome and our anesthetic management during their diagnostic bronchoscopy. Currently, documentation of complex airway pathology present in patients with Ohtahara syndrome is limited and should be further evaluated. This will assist pediatric anesthesiologists as these patients may require careful preoperative assessment, thoughtful airway management, and surgical alternatives on standby.

If hypnosis means contact to the unconscious to modulate psychological and physiological functions by means of suggestions, and if this is facilitated by attenuation of the critical mind, then the question arises as to whether suggestions also have an effect when waking consciousness is otherwise eliminated, namely by coma or anesthesia. A prerequisite would be perception, which actually is evidenced by reports of patients after traumatic brain injury, artificial coma, resuscitation or general anesthesia. Moreover, posttraumatic stress disorder (PTSD) frequently observed after these medical situations is hardly explainable without some sort of awareness under such conditions. Even advanced neurophysiological diagnostic cannot yet rule out consciousness or sensory processing. Especially reference to perception during unconsciousness is given by the results of a recent multicenter study on the effects of hypnotic communication with patients under controlled adequate deep general anesthesia. The observed reductions in incidence and severity of postoperative pain, opioid use, nausea and vomiting cannot be explained by the reaction of a few but only by a considerable proportion of patients. This leads to a strong plea for a more careful treatment of unconscious patients in the emergency room, operating theater or intensive care unit, for the abandonment of the restriction of therapeutic communication to awake patients, and for new aspects of communication and hypnosis research. Obviously, loss of consciousness does not protect against psychological injury, and continuation of communication is needed. But how and what to talk to unconscious patients? Generally addressing the unconscious mind with suggestions that generally exert their effects unconsciously, hypnotic communication appears to be the adequate language. Especially addressing meaningful topics, as derived from the basic psychological needs and known stressors, appears essential. With respect to negative effects by negative or missing communication or to the proposed protective and supporting effects of therapeutic communication with patients clinically rated as unconscious, the role of consciousness is secondary. For the effects of perceived signals and suggestions it does not matter whether consciousness is absent, or partial, or unrecognized present.

Emergence delirium is a common postoperative complication in patients undergoing general anesthesia, especially in children. In severe cases, it can cause unnecessary self-harm, affect postoperative recovery, lead to parental dissatisfaction, and increase medical costs. With the widespread use of inhalation anesthetic drugs (such as sevoflurane and desflurane), the incidence of emergence delirium in children is gradually increasing; however, its pathogenesis in children is complex and unclear. Several studies have shown that age, pain, and anesthetic drugs are strongly associated with the occurrence of emergence delirium. Alterations in central neurophysiology are essential intermediate processes in the development of emergence delirium. Compared to adults, the pediatric nervous system is not fully developed; therefore, the pediatric electroencephalogram may vary slightly by age. Moreover, pain and anesthetic drugs can cause changes in the excitability of the central nervous system, resulting in electroencephalographic changes. In this paper, we review the pathogenesis of and prevention strategies for emergence delirium in children from the perspective of brain electrophysiology-especially for commonly used pharmacological treatments-to provide the basis for understanding the development of emergence delirium as well as its prevention and treatment, and to suggest future research direction.

OBJECTIVE: Hypotension after induction of general anesthesia is common and is associated with significant adverse events. Identification of patients at high risk can inform the use of preoperative mitigation strategies. We conducted a systematic review and meta-analysis to assess the diagnostic accuracy of the inferior vena cava collapsibility index (IVC-CI) and maximal diameter (dIVCmax) in predicting postinduction hypotension and to identify their predictive performance across different threshold ranges.
METHODS: We searched MEDLINE, PubMed®, and Embase from inception to March 2023 for prospective observational studies exploring the performance of IVC-CI and dIVCmax in predicting postinduction hypotension in adults presenting for elective surgery under general anesthesia. We excluded studies reporting on IVC parameters predicting postinduction hypotension in the obstetric patient population or exclusively in patients with obesity. Trials screening and data extraction were conducted independently. We performed meta-analyses to identify the performance of IVC parameters in predicting postinduction hypotension, followed by subgroup analyses that sought the IVC-CI range with the highest hierarchical summary receiver-operating characteristic area under the curve (HSROC-AUC). We used a bivariate random effects model to calculate summary estimates. We evaluated study quality using Newcastle-Ottawa scores and certainty of evidence using the GRADE framework.
RESULTS: We included 14 studies involving 1,166 patients. Pooled sensitivity and specificity of the IVC-CI to predict postinduction hypotension was 0.68 (95% confidence interval [CI], 0.55 to 0.79; coverage probability, 0.91) and 0.78 (95% CI, 0.69 to 0.85; coverage probability, 0.9), respectively, with an HSROC-AUC of 0.80 (95% CI, 0.68 to 0.85, high quality of evidence). An IVC-CI threshold range of 40-45% had an HSROC-AUC of 0.86 (95% CI, 0.69 to 0.93, high quality of evidence).
CONCLUSIONS: Preoperative IVC-CI is a strong predictor of postinduction hypotension. We recommend that future studies use an IVC-CI threshold of 40-45% (low certainty of evidence). Future studies are needed to establish whether ultrasound-guided preoperative optimization improves outcomes in high-risk patients.
BACKGROUND: PROSPERO ( CRD42022316140 ); first submitted 10 March 2022.
RéSUMé: OBJECTIF: L’hypotension après l’induction de l’anesthésie générale est fréquente et est associée à des effets indésirables importants. L’identification des patient•es à haut risque peut éclairer l’utilisation de stratégies préopératoires d’atténuation. Nous avons réalisé une revue systématique et une méta-analyse pour évaluer la précision diagnostique de l’indice de collapsibilité de la veine cave inférieure (IC-VCI) et du diamètre maximal (dVCImax) pour prédire l’hypotension post-induction et identifier leurs performances prédictives dans différentes plages de seuils. MéTHODE: Nous avons fait des recherches dans les bases de données MEDLINE, PubMed® et Embase de leur création jusqu’en mars 2023 pour en extraire les études observationnelles prospectives explorant les performances de l’IC-VCI et du dVCImax pour la prédiction de l’hypotension post-induction chez des adultes se présentant pour une chirurgie non urgente sous anesthésie générale. Nous avons exclu les études rapportant des paramètres de VCI prédisant l’hypotension post-induction dans la population obstétricale ou exclusivement chez des personnes obèses. Le tri des études et l’extraction des données ont été menés indépendamment. Nous avons réalisé des méta-analyses pour identifier la performance des paramètres de VCI dans la prédiction de l’hypotension post-induction, suivies d’analyses de sous-groupes qui ont recherché la plage d’IC-VCI avec le plus haut niveau de hiérarchie de l’aire sous la courbe de la courbe ROC (HSROC-AUC). Nous avons utilisé un modèle bivarié à effets aléatoires pour calculer des estimations sommaires. Nous avons évalué la qualité des études à l’aide des scores de Newcastle-Ottawa et la certitude des données probantes à l’aide de l’outil GRADE. RéSULTATS: Quatorze études portant sur 1166 patient·es ont été incluses. La sensibilité et la spécificité combinées de l’IC-VCI pour prédire l’hypotension post-induction étaient de 0,68 (intervalle de confiance [IC] à 95 %, 0,55 à 0,79; probabilité de couverture, 0,91) et 0,78 (IC 95 %, 0,69 à 0,85; probabilité de couverture, 0,9), respectivement, avec une HSROC-AUC de 0,80 (IC 95 %, 0,68 à 0,85, données probantes de haute qualité). Une plage de seuils d’IC-VCI de 40 à 45 % avait une HSROC-AUC de 0,86 (IC 95 %, 0,69 à 0,93, haute qualité des données probantes). CONCLUSION: L’IC-VCI préopératoire est un bon prédicteur de l’hypotension post-induction. Nous recommandons que les études futures utilisent un seuil d’IC-VCI de 40 à 45 % (faible certitude des données probantes). De futures études sont nécessaires pour déterminer si l’optimisation préopératoire échoguidée améliore les devenirs chez la patientèle à risque élevé. ENREGISTREMENT DE L’éTUDE: PROSPERO ( CRD42022316140 ); première soumission le 10 mars 2022.

OBJECTIVE: The purpose of this study was to describe the experiences of critical care nurses (CCNs) and registered nurse anesthetists (RNAs) when monitoring and observing infants and toddlers recovering from anesthesia.
METHODS: A qualitative design with a critical incident approach.
METHODS: Semistructured individual interviews were conducted with a purposeful sample of CCNs and RNAs (n = 17) from postanesthesia care units at two hospitals. The critical incident technique approach was used to guide the interviews, and data were analyzed inductively using thematic analysis.
RESULTS: The main finding was the CCNs\' and RNAs\' description of how they \"watch over the children and stay close\" to provide emotional and physical safety. CCNs\' and RNAs\' experiences of observing and managing the children\'s small, immature airways were reflected in the theme \"using situation awareness of the small, immature airways.\" The theme \"understanding emergence agitation\" describes the challenge that arises when children are anxious, feel insecure, and have pain, and the theme \"having parents nearby\" shows the necessity and value of involving parents in their children\'s care.
CONCLUSIONS: Findings from this study suggest that caring for infants and toddlers recovering from anesthesia requires experience and both technical and nontechnical skills. These are prerequisites for achieving readiness for planning, setting priorities, and adapting one\'s behavior if an adverse event occurs. Alertness and the ability to solve acute problems and make quick decisions are essential because of the risks associated with children\'s small, immature airways, as is the ability to understand and respond to emergence agitation. Having parents nearby is equally important for creating the conditions for compassionate child- and family-centered care.

OBJECTIVE: Awake extubation and deep extubation are commonly used anesthesia techniques. In this study, the safety of propofol-assisted deep extubation in the dental treatment of children was assessed.
METHODS: Children with severe caries who received dental treatment under general anesthesia and deep extubation between January 2017 and June 2023 were included in this study. Data were collected on the following variables: details and time of anesthesia, perioperative vital signs, and incidence of postoperative complications. The incidence of laryngeal spasm (LS) was considered to be the primary observation indicator.
RESULTS: The perioperative data obtained from 195 children undergoing dental treatment was reviewed. The median age was 4.2 years (range: 2.3 to 9.6 years), and the average duration of anesthesia was 2.56 h (range 1 to 4.5 h). During intubation with a videoscope, purulent mucus was found in the pharyngeal cavity of seven children (3.6%); LS occurred in five of them (2.6%), and one child developed a fever (T = 37.8 °C) after discharge. Five children (2.6%) experienced emergence agitation (EA) in the recovery room. Also, 13 children (6.7%) experienced epistaxis; 10 had a mild experience and three had a moderate experience. No cases of airway obstruction (AO) and hypoxemia were recorded. The time to open eyes (TOE) was 16.3 ± 7.2 min. The incidence rate of complications was 23/195 (11.8%). Emergency tracheal reintubation was not required. Patients with mild upper respiratory tract infections showed a significantly higher incidence of complications (P < 0.001).
CONCLUSIONS: Propofol-assisted deep extubation is a suitable technique that can be used for pediatric patients who exhibited non-cooperation in the outpatient setting. Epistaxis represents the most frequently encountered complication. Preoperative upper respiratory tract infection significantly increases the risk of complications. The occurrence of EA was notably lower than reported in other studies.

BACKGROUND: Reliable assessment of fluid responsiveness with pulse pressure variation (PPV) depends on certain ventilation-related preconditions; however, some of these requirements are in contrast with recommendations for protective ventilation.
OBJECTIVE: The aim of this study was to evaluate the applicability of PPV in patients undergoing non-cardiac surgery by retrospectively analyzing intraoperative ventilation data.
METHODS: Intraoperative ventilation data from three large medical centers in Germany and Switzerland from January to December 2018 were extracted from electronic patient records and pseudonymized; 10,334 complete data sets were analyzed with respect to the ventilation parameters set as well as demographic and medical data.
RESULTS: In 6.3% of the 3398 included anesthesia records, patients were ventilated with mean tidal volumes (mTV) > 8 ml/kg predicted body weight (PBW). These would qualify for PPV-based hemodynamic assessment, but the majority were ventilated with lower mTVs. In patients who underwent abdominal surgery (75.5% of analyzed cases), mTVs > 8 ml/kg PBW were used in 5.5% of cases, which did not differ between laparoscopic (44.9%) and open (55.1%) approaches. Other obstacles to the use of PPV, such as elevated positive end-expiratory pressure (PEEP) or increased respiratory rate, were also identified. Of all the cases 6.0% were ventilated with a mTV of > 8 ml/kg PBW and a PEEP of 5-10 cmH2O and 0.3% were ventilated with a mTV > 8 ml/kg PBW and a PEEP of > 10 cmH2O.
CONCLUSIONS: The data suggest that only few patients meet the currently defined TV (of > 8 ml/kg PBW) for assessment of fluid responsiveness using PPV during surgery.
UNASSIGNED: HINTERGRUND: Eine zuverlässige Beurteilung der intraoperativen Flüssigkeitsreagibilität unter Verwendung der Pulsdruckvariation (PPV) hängt von bestimmten beatmungsbezogenen Voraussetzungen ab. Diese stehen häufig im Widerspruch zu den Empfehlungen einer lungenprotektiven Beatmung.
UNASSIGNED: Ziel dieser Studie war die retrospektive Analyse medizinischer und intraoperativer Beatmungsdaten im Hinblick auf die Anwendbarkeit der PPV bei Patienten während nicht-kardiochirurgischer Operationen.
METHODS: Retrospektive Daten von 10.334 Patienten aus dem Zeitraum von Januar bis Dezember 2018 aus drei großen medizinischen Zentren in Deutschland und der Schweiz wurden anhand elektronischer Patientenakten pseudonymisiert analysiert. Die Auswertung erfolgte hinsichtlich verschiedener Beatmungsparameter, demografischer und medizinischer Daten.
UNASSIGNED: Von den 3398 eingeschlossenen Anästhesiedatensätzen wurden die Patienten in 6,3 % der Fälle mit einem mittleren Tidalvolumen (mTV) > 8 ml/kg idealem Körpergewicht (IKG) beatmet. Diese würden sich für ein PPV-basiertes Flüssigkeitsmanagement qualifizieren, aber die Mehrheit der Patienten wurde mit niedrigeren mTV beatmet. Bei Patienten, die sich einer abdominellen Operation unterzogen (75,5 % der analysierten Fälle), wurde bei 5,5 % der Patienten ein mTV > 8 ml/kg IKG verwendet, wobei es keinen Unterschied zwischen laparoskopischem (44,9 %) und offenem (55,1 %) Zugangsweg gab. Auch andere Bedingungen für die Verwendung von PPV, beispielsweise der positive end-exspiratorische Druck (PEEP), die Atemfrequenz oder der Herzrhythmus wurden untersucht. 6,0 % aller analysierten Fälle wurden mit einem mTV > 8 ml/kg IKG und einem PEEP von 5–10 cmH2O beatmet und 0,3 % mit einem mTV > 8 ml/kg IKG und einem PEEP > 10 cmH2O.
CONCLUSIONS: Die Ergebnisse deuten darauf hin, dass nur wenige Patienten die derzeit erforderlichen Beatmungsparameter erfüllen, um intraoperativ PPV zur Beurteilung der Flüssigkeitsreagibilität anzuwenden. Die Limitationen der Anwendung von PPV sollten im klinischen Alltag Berücksichtigung finden. Eine vorsichtige Interpretation, insbesondere in Bezug auf etablierte Schwellenwerte, kann dazu beitragen, die Genauigkeit und Effizienz von PPV-gesteuerten intraoperativen Flüssigkeitstherapien zu verbessern.

BACKGROUND: Spinal anesthesia (SA) is commonly used within the specialties of orthopedic surgery, obstetrics and gynecology, spine surgery, and general surgery, and offers several benefits over general anesthesia (GA). However, SA is used much less frequently in plastic surgery. This review analyzed currently existing data on SA use across various surgical specialties and compared the benefits and complications of SA to those of GA, to assess its utility and potential for more widespread use in plastic surgery.
METHODS: A comprehensive literature review was conducted using the PubMed and Cochrane Library databases to evaluate the utility of SA in plastic surgery. Indications, contraindications, and data on the use of SA across various surgical specialties were reviewed. Benefits, complications, and cost-effectiveness were also assessed. Finally, the utility of SA in plastic surgery was evaluated based on the available literature.
RESULTS: SA has been shown to yield several benefits and fewer risks than GA, including a higher possibility of early discharge, decreased costs, better pain and postoperative nausea and vomiting control, and decreased risk of deep venous thrombosis and pulmonary embolism.
CONCLUSIONS: Although commonly used for procedures across various surgical specialties such as obstetrics and gynecology, urology, and orthopedic surgery, SA is less frequently used within plastic surgery. Plastic surgery procedures that would benefit from the use of SA include those below the umbilicus such as liposuction, lower extremity procedures, and perineal procedures, and owing to its benefits, we recommend that SA be used more often within plastic surgery under appropriate clinical circumstances.

BACKGROUND: Mechanical thrombectomy (MT) is the standard of care for the treatment of acute ischemic stroke (AIS) with large vessel occlusion (LVO), but unfavorable outcomes remain common. Procedural arterial hypotension is associated with poor patient outcome. This study aimed to assess the impact of arterial hypotension \"magnitude\" (a combination of the depth, defined as the percentage relative to baseline arterial blood pressure, and the duration of hypotensive episodes)\" during MT on neurological outcome.
METHODS: This is a monocentric retrospective study. Charts were reviewed between January 2018 and June 2021. \"Patients were eligible if they were 18 years or older, anterior LVO was diagnosed on cerebral imaging\" and MT performed under general anesthesia. Mean arterial pressure (MAP) was recorded every 5 minutes throughout the procedure, and the arterial hypotension \"magnitude\" was estimated by the area under the curve (AUC) for different thresholds of MAP drops.
METHODS: The modified Rankin Scale (mRS) at 90 days.
RESULTS: Among the 117 patients analyzed, 46% had poor neurological outcome. Our study showed correlations between poor outcome and a greater procedural AUC of arterial hypotension for the different thresholds: 5% (k 0.18; 95% CI 0.06-0.30; P = 0.007), 10% (k 0.18; 95% CI 0.05-0.30; P = 0.008), 15% (k 0.18; 95% CI 0.04-0.30; P = 0.011), 20% (k 0.18; 95% CI 0.05-0.30; P = 0.010) and 30% (k 0.19; 95% CI 0.05-0.31; P = 0.010). This association persisted after controlling for age, baseline NIHSS score, and ASPECT score.
CONCLUSIONS: The magnitude of hypotension during MT under general anesthesia for AIS is an independent factor of poor outcome at 90 days. These associations have been observed in patients with mild and severe hypotensive episodes.

This case report discusses medical adhesive-related skin injuries (MARSIs) caused by eye taping during an emergency open reduction internal fixation surgery under general anesthesia. The presented case involves a 72-year-old woman with a proximal humeral fracture, where 3M Transpore adhesive tape caused blisters on both eyelids. This tape is an acrylic-based medical adhesive and is commonly used to keep eyelids closed during general anesthesia. MARSIs can largely be prevented through evidence-based clinical guidance. Enhancing awareness of MARSIs among anesthesia providers and perianesthesia nurses is crucial to prevent and manage such injuries effectively.