Postoperative Outcomes Associated With Procedural Sedation Conducted by Physician and Nonphysician Anesthesia Providers: Findings From the Prospective, Observational African Surgical Outcomes Study

Method of Anesthesia and Perioperative Risk Factors, Maternal Anesthesia Complications, and Neonatal Mortality Following Cesarean Delivery in Africa: A Substudy of a 7-Day Prospective Observational Cohort Study

BACKGROUND

The African Surgical Outcomes Study (ASOS) found that maternal mortality following cesarean delivery in Africa is 50 times higher than in high-income countries, and associated with obstetric hemorrhage and anesthesia complications. Mothers who died were more likely to receive general anesthesia (GA). The associations between GA versus spinal anesthesia (SA) and preoperative risk factors, maternal anesthesia complications, and neonatal outcomes following cesarean delivery in Africa are unknown.

METHODS

This is a secondary explanatory analysis of 3792 patients undergoing cesarean delivery in ASOS, a prospective observational cohort study, across 22 African countries. The primary aim was to estimate the association between preoperative risk factors and the outcome of the method of anesthesia delivered. Secondary aims were to estimate the association between the method of anesthesia and the outcomes (1) maternal intraoperative hypotension, (2) severe maternal anesthesia complications, and (3) neonatal mortality. Generalized linear mixed models adjusting for obstetric gravidity and gestation, American Society of Anesthesiologists (ASA) category, urgency of surgery, maternal comorbidities, fetal distress, and level of anesthesia provider were used.

RESULTS

Of 3709 patients, SA was performed in 2968 (80%) and GA in 741 (20%). Preoperative factors independently associated with GA for cesarean delivery were gestational age (adjusted odds ratio [aOR], 1.093; 95% confidence interval [CI], 1.052-1.135), ASA categories III (aOR, 11.84; 95% CI, 2.93-46.31) and IV (aOR, 11.48; 95% CI, 2.93-44.93), eclampsia (aOR, 3.92; 95% CI, 2.18-7.06), placental abruption (aOR, 6.23; 95% CI, 3.36-11.54), and ruptured uterus (aOR, 3.61; 95% CI, 1.36-9.63). SA was administered to 48 of 94 (51.1%) patients with eclampsia, 12 of 28 (42.9%) with cardiac disease, 14 of 19 (73.7%) with preoperative sepsis, 48 of 76 (63.2%) with antepartum hemorrhage, 30 of 55 (54.5%) with placenta previa, 33 of 78 (42.3%) with placental abruption, and 12 of 29 (41.4%) with a ruptured uterus. The composite maternal outcome "all anesthesia complications" was more frequent in GA than SA (9/741 [1.2%] vs 3/2968 [0.1%], P < .001). The unadjusted neonatal mortality was higher with GA than SA (65/662 [9.8%] vs 73/2669 [2.7%], P < .001). The adjusted analyses demonstrated no association between method of anesthesia and (1) intraoperative maternal hypotension and (2) neonatal mortality.

CONCLUSIONS

Analysis of patients undergoing anesthesia for cesarean delivery in Africa indicated patients more likely to receive GA. Anesthesia complications and neonatal mortality were more frequent following GA. SA was often administered to high-risk patients, including those with eclampsia or obstetric hemorrhage. Training in the principles of selection of method of anesthesia, and the skills of safe GA and neonatal resuscitation, is recommended.

Capnography-An Essential Monitor, Everywhere: A Narrative Review

Capnography is now recognized as an indispensable patient safety monitor. Evidence suggests that its use improves outcomes in operating rooms, intensive care units, and emergency departments, as well as in sedation suites, in postanesthesia recovery units, and on general postsurgical wards. Capnography can accurately and rapidly detect respiratory, circulatory, and metabolic derangements. In addition to being useful for diagnosing and managing esophageal intubation, capnography provides crucial information when used for monitoring airway patency and hypoventilation in patients without instrumented airways. Despite its ubiquitous use in high-income-country operating rooms, deaths from esophageal intubations continue to occur in these contexts due to incorrect use or interpretation of capnography. National and international society guidelines on airway management mandate capnography's use during intubations across all hospital areas, and recommend it when ventilation may be impaired, such as during procedural sedation. Nevertheless, capnography's use across high-income-country intensive care units, emergency departments, and postanesthesia recovery units remains inconsistent. While capnography is universally used in high-income-country operating rooms, it remains largely unavailable to anesthesia providers in low- and middle-income countries. This lack of access to capnography likely contributes to more frequent and serious airway events and higher rates of perioperative mortality in low- and middle-income countries. New capnography equipment, which overcomes cost and context barriers, has recently been developed. Increasing access to capnography in low- and middle-income countries must occur to improve patient outcomes and expand universal health care. It is time to extend capnography's safety benefits to all patients, everywhere.

Challenges of Anesthetic Monitoring in Low- and Middle-Income Countries: Availability of Equipment in Major Referral Hospitals in Kenya

BACKGROUND

Anesthetic monitoring within standards defined by various professional anesthesia organizations has been shown to reduce perioperative mortality. Given the scarce resources for anesthesia and surgery in low- to middle-income countries, we sought to determine the availability of recommended monitoring devices in major referral hospitals in Kenya.

METHODS

We purposely selected the 16 major referral hospitals in Kenya. A cross-sectional survey was conducted in 103 operating theaters, 96 postanesthesia care unit (PACU) beds, and 16 areas where procedural sedation was routinely administered. A checklist questionnaire based on the Association of Anaesthetists of Great Britain and Ireland (AAGBI) guidelines of 2015 was used to determine the availability of basic and functional monitoring devices.

RESULTS

We determined that only 1 of 16 (6.25%) hospitals had all the monitoring devices recommended by the AAGBI. Automated noninvasive blood pressure (NIBP) monitoring and pulse oximetry were present in all operating theaters. Continuous electrocardiography (ECG) was available in 102 of 103 (99%) operating theaters, skin temperature monitoring probes in 73 of 103 (70.9%), and capnography in 49 (47.6%). A nerve stimulator was accessible in 5 of 16 (31.25%) hospitals. There were functional patient monitors in all operating theaters (100%). One of the regional referral hospitals did not have a PACU. We encountered 9 of 96 (9.4%) PACU beds without any monitoring devices. Pulse oximetry was the most common device (84.4%) in the PACU beds equipped with monitoring. In 5 of 16 (31.25%) procedural sedation areas, pulse oximetry was the only monitoring device, whereas there were no devices in 2 of 16 (12.5%) areas. Portable multiparameter devices used for patient transport were present in 5 of 16 (31.25%) hospitals.

CONCLUSIONS

The availability of recommended monitoring devices in major referral hospitals in Kenya is inadequate. Thus, there are challenges to anesthetic monitoring in these hospitals, and perioperative patient safety is jeopardized. We recommend the universal provision of basic monitoring devices and suggest the use of the data collected in this study to affect policy change and safe anesthesia practice in our country.

Determining the Minimum Dataset for Surgical Patients in Africa: A Delphi Study

BACKGROUND

It is often difficult for clinicians in African low- and middle-income countries middle-income countries to access useful aggregated data to identify areas for quality improvement. The aim of this Delphi study was to develop a standardised perioperative dataset for use in a registry.

METHODS

A Delphi method was followed to achieve consensus on the data points to include in a minimum perioperative dataset. The study consisted of two electronic surveys, followed by an online discussion and a final electronic survey (four Rounds).

RESULTS

Forty-one members of the African Perioperative Research Group participated in the process. Forty data points were deemed important and feasible to include in a minimum dataset for electronic capturing during the perioperative workflow by clinicians. A smaller dataset consisting of eight variables to define risk-adjusted perioperative mortality rate was also described.

CONCLUSIONS

The minimum perioperative dataset can be used in a collaborative effort to establish a resource accessible to African clinicians in improving quality of care.