Determinants and Practice Variability of Oxygen Administration during Surgery in the United States: A Retrospective Cohort Study.

BACKGROUND: The best approaches to supplemental oxygen administration during surgery remain unclear, which may contribute to variation in practice. This study aimed to assess determinants of oxygen administration and its variability during surgery. METHODS: Using multivariable linear mixed-effects regression, the study measured the associations between intraoperative fraction of inspired oxygen and patient, procedure, medical center, anesthesiologist, and in-room anesthesia provider factors in surgical cases of 120 min or longer in adult patients who received general anesthesia with tracheal intubation and were admitted to the hospital after surgery between January 2016 and January 2019 at 42 medical centers across the United States participating in the Multicenter Perioperative Outcomes Group data registry. RESULTS: The sample included 367,841 cases (median [25th, 75th] age, 59 [47, 69] yr; 51.1% women; 26.1% treated with nitrous oxide) managed by 3,836 anesthesiologists and 15,381 in-room anesthesia providers. Median (25th, 75th) fraction of inspired oxygen was 0.55 (0.48, 0.61), with 6.9% of cases less than 0.40 and 8.7% greater than 0.90. Numerous patient and procedure factors were statistically associated with increased inspired oxygen, notably advanced American Society of Anesthesiologists classification, heart disease, emergency surgery, and cardiac surgery, but most factors had little clinical significance (less than 1% inspired oxygen change). Overall, patient factors only explained 3.5% (95% CI, 3.5 to 3.5%) of the variability in oxygen administration, and procedure factors 4.4% (95% CI, 4.2 to 4.6%). Anesthesiologist explained 7.7% (95% CI, 7.2 to 8.2%) of the variability in oxygen administration, in-room anesthesia provider 8.1% (95% CI, 7.8 to 8.4%), medical center 23.3% (95% CI, 22.4 to 24.2%), and 53.0% (95% CI, 52.4 to 53.6%) was unexplained. CONCLUSIONS: Among adults undergoing surgery with anesthesia and tracheal intubation, supplemental oxygen administration was variable and appeared arbitrary. Most patient and procedure factors had statistical but minor clinical associations with oxygen administration. Medical center and anesthesia provider explained significantly more variability in oxygen administration than patient or procedure factors.

Knowledge of Obstetric and Neonatal Danger Signs among Community Health Workers in the Rongo Sub-County of Migori County, Kenya: Results of a Community-based Cross-Sectional Survey.

In efforts to reduce maternal and neonatal mortality, it is recommended that all pregnant women be counseled on signs of pregnancy related complications and neonatal illness. In resource limited settings, such counselling may be task-shifted to lay health workers. We conducted a community-based cross-sectional survey of community health workers/volunteers in North and East Kamagambo of the Rongo Sub- County of Migori County, Kenya, between January-April 2018. A survey tool was administered through face-to-face interviews to investigate the level of knowledge of obstetric and neonatal danger signs among community health workers in North Kamagambo after one year of participation in the Lwala program, as well as to evaluate baseline knowledge of community health volunteers in East Kamagambo at the beginning of Lwala's expansion and prior to their receiving training from Lwala. The North Kamagambo group identified more danger signs in each category. The percentage of participants with adequate knowledge in the pregnancy, postpartum, and neonatal categories was significantly higher in North Kamagambo than in East Kamagambo. Sixty percent of participants in North Kamagambo knew 3 or more danger signs in 3 or more categories, compared to 24% of participants in East Kamagambo. Location in North Kamagambo (OR 2.526, p=0.03) and a shorter time since most recent training (OR 2.291, p=0.025) were associated with increased knowledge. Our study revealed varying levels of knowledge among two populations of lay health workers. This study highlights the benefit of frequent trainings and placing greater emphasis on identified gaps in knowledge of the labor and postpartum periods.