Anesthesia and analgesia
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Anesthesia and analgesia · Apr 2020
ReviewA Narrative Review of Oxygenation During Pediatric Intubation and Airway Procedures.
Hypoxemia is a common complication in the pediatric operating room during endotracheal intubation and airway procedures and is a precursor to serious adverse events. Small children and infants are at greater risk of hypoxemia due to their high metabolic requirements and propensity to alveolar collapse during general anesthesia. To improve the care and safety of this vulnerable population, continued efforts must be directed to mitigate hypoxemia and the risk of subsequent serious adverse events. ⋯ Humidified, high-flow nasal oxygenation systems have been shown to provide excellent conditions for effective apneic oxygenation in adults and children and have the added benefit of providing some carbon dioxide clearance in adults; although, this latter benefit has not been shown in children. Humidified, high-flow nasal oxygenation systems may also be useful during spontaneous ventilation for airway procedures in children by minimizing room air entrainment and maintaining adequate oxygenation allowing for a deeper anesthetic. The use of apneic oxygenation and humidified, high-flow nasal oxygenation systems in the pediatric operating room reduces the incidence of hypoxemia and may be effective in decreasing related complications.
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Anesthesia and analgesia · Apr 2020
Supplemental Intraoperative Oxygen Does Not Promote Acute Kidney Injury or Cardiovascular Complications After Noncardiac Surgery: Subanalysis of an Alternating Intervention Trial.
Perioperative hyperoxia has been recommended by the World Health Organization and the Centers for Disease Control and Prevention for the prevention of surgical site infections. Based on animal studies and physiological concerns, the kidneys and heart may be at risk from hyperoxia. We therefore conducted 2 unplanned subanalyses of a previous alternating cohort trial in which patients having colorectal surgery were assigned to either 30% or 80% inspired intraoperative oxygen. Specifically, we tested 2 coprimary hypotheses: (1) hyperoxia increases the incidence of acute kidney injury (AKI) within 7 postoperative days (PODs); and (2) hyperoxia worsens a composite of myocardial injury, in-hospital cardiac arrest, and 30-day mortality. ⋯ We found no evidence that intraoperative hyperoxia causes AKI or cardiovascular complications in adults undergoing colorectal surgery. Consequently, we suggest that clinicians select intraoperative inspired oxygen fraction based on other considerations.
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Anesthesia and analgesia · Apr 2020
Observational StudyProspective Association of Serum Opioid Levels and Clinical Outcomes in Patients With Cancer Pain Treated With Intrathecal Opioid Therapy.
Opioids remain the mainstay of cancer pain management but are associated with systemic toxicity. In refractory cancer pain, intrathecal therapy (ITT) is associated with improved pain control, reduced systemic side effects, and improved survival. It has been assumed that ITT decreases systemic serum opioid levels and their associated toxicity, but there are limited data to support this assumption. This study hypothesizes that serum opioid levels decrease with ITT. Secondary objectives include comparative measures of pain, bowel function, and other cancer-related symptoms. ⋯ ITT for cancer pain was associated with a marked reduction in serum opioid concentrations, with the majority of patients having undetectable serum levels. Reducing serum opioid concentrations in cancer patients may have implications with respect to restoring bowel function, improving fatigue, and promoting the integrity of antitumor immune function and warrants further study.
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Anesthesia and analgesia · Apr 2020
Evaluating Propofol Concentration in Blood From Exhaled Gas Using a Breathing-Related Partition Coefficient.
The anesthetic side effects of propofol still occur in clinical practice because no reliable monitoring techniques are available. In this regard, continuous monitoring of propofol in breath is a promising method, yet it remains infeasible because there is large variation in the blood/exhaled gas partial pressure ratio (RBE) in humans. Further evaluations of the influences of breathing-related factors on RBE would mitigate this variation. ⋯ The prediction of propofol concentration in blood was more accurate using RBEM than when using RBE and could provide reference information for anesthesiologists. Moreover, the present study provided a general approach for assessing the influence of relevant physiological factors and will inform noninvasive and accurate breath assessment of volatile drugs or metabolites in blood.