Factors Contributing to Lingering Pain after Surgery: The Role of Patient Expectations.

Background: Pain that lingers beyond the early weeks after the acute postoperative period is an important risk factor for chronic postsurgical pain. This study examined the hypothesis that patients' expectations about their postsurgical pain would be independently associated with lingering postsurgical pain.

Methods: The study included 3,628 patients who underwent diverse surgeries between February 2015 and October 2016 in a single U.

Impact of the Addition of Examples to the American Society of Anesthesiologists Physical Status Classification System.

Examples of comorbidities for the widely used American Society of Anesthesiologists physical status (ASA-PS) classification system were developed and approved in 2014. We conducted a retrospective cohort study of patients with 4 comorbidities included in the examples as warranting a specific minimum ASA-PS class. For each comorbidity subgroup, we used interrupted time-series models to compare ASA-PS underclassification for the periods before (2011-2014) and after (2015-2017) the introduction of examples.

A Population-Based Analysis of Intraoperative Cardiac Arrest in the United States.

Background: A new billable code for intraoperative cardiac arrest was introduced with the International Classification of Diseases, Tenth Revision, classification system. Using a national administrative database, we performed a retrospective analysis of intraoperative cardiac arrest in the United States.

Methods: Hospital admissions involving patients ≥18 years of age who underwent operating room procedures in 2016 were identified using the National Inpatient Sample.

Amnesia of the Operating Room in the B-Unaware and BAG-RECALL Clinical Trials.

Background: Patient memories of the operating room (OR) may serve as the informational basis for assessing satisfaction with individual anesthesiologists. Furthermore, the provision of clinically important information may assume that perioperative memories are retained. Studies assessing the extent of perioperative amnesia and factors associated with perioperative amnesia are sparse.

Concurrence of Intraoperative Hypotension, Low Minimum Alveolar Concentration, and Low Bispectral Index Is Associated with Postoperative Death.

Background: An intraoperative concurrence of mean arterial pressure less than 75 mmHg, minimum alveolar concentration less than 0.8, and bispectral index less than 45 has been termed a "triple low" state. An association between triple low and postoperative mortality has been reported but was not replicated in a subsequent study.

Obstructive sleep apnea screening and postoperative mortality in a large surgical cohort.

Objective: A recent investigation at Barnes-Jewish Hospital located in St. Louis, Missouri, found that an estimated 22% of adults presenting for inpatient surgery screened as high risk for obstructive sleep apnea (OSA). Surgical patients with OSA have multiple comorbidities and are at increased risk for perioperative complications.