American Society of Anesthesiologists Committee. Practice guidelines for preoperative fasting and the use of pharmacologic agents to reduce the risk of pulmonary aspiration: application to healthy patients undergoing elective procedures: an updated report by the American Society of Anesthesiologists Committee on Standards and Practice Parameters

Echocardiography in the Era of Obesity

Patients with obesity are at increased risk for coronary artery disease and heart failure and often present with symptoms of dyspnea, fatigue, edema, or chest pain. Echocardiography is frequently used to help distinguish whether these symptoms are due to cardiac disease. Unfortunately, obesity has a significant impact on image quality because of signal attenuation. Ultrasound-enhancing agents may improve the detection of structural remodeling and subclinical left ventricular dysfunction in patients with obesity. Assessment of chamber sizes and cardiac remodeling in severely obese subjects must be interpreted with caution, however, as the current recommendations for indexing cardiac chamber sizes to body size may lead to false conclusions about chamber volumes or mass, particularly in settings in which weight is changing. As a result of increases in stroke volume and cardiac output, obesity may exacerbate hemodynamic compromise in obstructive structural or valvular disease. With regard to assessment of ischemic heart disease, stress echocardiography can effectively risk-stratify patients with obesity and may have advantages over other noninvasive modalities. In general, transesophageal echocardiography is safe in patients with obesity, although some precautions should be observed. Stress echocardiography using the transesophageal approach is an alternative for preoperative or ischemia evaluation in patients with suboptimal transthoracic views.

Enhanced recovery care versus traditional non-ERAS care following osteotomies in developmental dysplasia of the hip in children: a retrospective case-cohort study

Background

Enhanced recovery after surgery (ERAS) has been shown to shorten the length of hospital stay and reduce the incidence of perioperative complications in many surgical fields. However, there has been a paucity of research examining the application of ERAS in major pediatric orthopaedic surgeries. This study aims to compare the perioperative complications and length of hospital stay after osteotomies in children with developmental dysplasia of the hip (DDH) between ERAS and traditional non-ERAS group.

Methods

The ERAS group consisted of 86 patients included in the ERAS program from January 2016 to December 2017. The Control group consisted of 82 DDH patients who received osteotomies from January 2014 to December 2015. Length of hospital stay, physiological function, postoperative visual analogue scale (VAS) score, and postoperative complications were compared between the two groups.

Results

The mean duration of hospital stay was significantly reduced from 10.0 ± 3.1 in the traditional care group to 6.0 ± 0.8 days in the ERAS(P < 0.001). The average VAS score in the first 3 days was significantly lower in the ERAS group (2.9 ± 0.8) than the traditional non-ERAS group (4.0 ± 0.8) (P < 0.001). However, there was no significant difference in the frequency of break-out pain (VAS > 4) between two groups (29.5 ± 6.3 times vs.30.6 ± 6.5 times, P = 0.276). The frequency of postoperative fever was lower in the ERAS group. The frequency of urinary tract infection in both groups were not noticeable because the catheter was removed promptly after the surgery.

Conclusion

The ERAS protocol is both safe and feasible for pediatric DDH patients undergoing osteotomies, and it can shorten the length of hospital stay without increasing the risk of perioperative complications.

Perioperative glycemic measures among non-fasting gynecologic oncology patients receiving carbohydrate loading in an enhanced recovery after surgery (ERAS) protocol

INTRODUCTION

Preoperative carbohydrate loading is an effective method to control postoperative insulin resistance. However, data are limited concerning the effects of carbohydrate loading on preoperative hyperglycemia and possible impacts on complication rates.

METHODS

A prospective cohort study was performed of patients enrolled in an enhanced recovery after surgery pathway at a single institution. All patients underwent laparotomy for known or suspected gynecologic malignancies. Patients who had been diagnosed with diabetes preoperatively and those prescribed total parenteral nutrition by their providers were excluded. Data regarding preoperative carbohydrate loading with a commercial maltodextrin beverage, preoperative glucose testing, postoperative day 1 glucose, insulin administration, and complications (all complications, infectious complications, and hyperglycemia-related complications) were collected. The primary endpoint of the study was the incidence of postoperative infectious complications, defined as superficial or deep wound infection, organ/space infection, urinary tract infection, pneumonia, sepsis, or septic shock.

RESULTS

Of 415 patients, 76.9% had a preoperative glucose recorded. The mean age was 60.5±12.4 years (range 18-93). Of those with recorded glucose values, 30 patients (9.4%) had glucose ≥180 mg/dL, none of whom were actually given insulin preoperatively. Median preoperative glucose value was significantly increased after carbohydrate loading (122.0 mg/dL with carbohydrate loading vs 101.0 mg/dL without, U=3143, p=0.001); however, there was no relationship between carbohydrate loading and complications. There was a significantly increased risk of hyperglycemia-related complications with postoperative day 1 morning glucose values ≥140 mg/dL (OR 1.85, 95% CI 1.07 to 3.23; p=0.03). Otherwise, preoperative and postoperative hyperglycemia with glucose thresholds of ≥140 mg/dL or ≥180 mg/dL were not associated with increased risk of other types of complications.

DISCUSSION

Carbohydrate loading is associated with increased preoperative glucose values; however, this is not likely to be clinically significant as it does not have an impact on complication rates. Preoperative hyperglycemia is not a risk factor for postoperative complications in a carbohydrate-loaded population when known diabetic patients are excluded.

PRECIS

While glucose increased with carbohydrate loading in non-diabetic patients, this was not associated with complications.

Ultrasound to guide the individual medical decision by evaluating the gastric contents and risk of aspiration: A literature review

Pulmonary aspiration of gastric contents is one of the most terrible complications following general anesthesia. It is important for patients to prevent this complication by obeying the preoperative fasting protocol strictly. At present, it has been reported by many studies that bedside ultrasound, as a non-invasive and convenient method, could be used to evaluate gastric contents qualitatively and quantitatively. With the advantages of reliability, accuracy and repeatability, it can greatly reduce the risk of aspiration and ensure patients' life security. But most of the data were acquired from the healthy volunteers. For the gastrointestinal disorder, the pregnant women, obesity, children, the elderly and diabetes patients, the accuracy and reliability of ultrasound to predict the risk of aspiration remains to be identified by more further studies. For these patients with increasing risk of aspiration, I-AIM (Indication, Acquisition, Interpretation, Medical decision-making) framework plays an important role in ensuring the safety of patients. It is crucial to make appropriate clinical decisions by evaluating the gastric contents with ultrasound.

Parents' perception and factors affecting compliance with preoperative fasting instructions in children undergoing day care surgery: A prospective observational study

Background and Aims:

Fasting guidelines have been recommended in the paediatric population to minimise the risk of pulmonary aspiration. The present study was planned to assess the compliance with fasting instructions in children undergoing ambulatory surgery and identify the factors affecting it.

Methods:

A total of 1,050 ASA I and II children aged 1–12 years, scheduled for day care surgery were enrolled. Parents of these children were given a questionnaire with specific questions like fasting instructions, source of instructions, actual fasting times and reasons for not following instructions.

Results:

Only 90 (8.5%) parents followed fasting instructions as advised. Of the 960 non-compliant patients, 31 (2.9) inadequately fasted while 929 (88.4%) fasted more than advised. While only 5.2% mentioned aspiration, 25% cited vomiting as the reason for fasting. Younger parents (OR = 0.853, 95% CI-0.796 to 0.915), fasting instructions in writing (OR = 10.808, 95% CI-1.459 to 80.059) and separate instruction for solids and liquids (OR = 6.016, 95% CI- 3.663 to 9.883) were found to affect compliance with fasting instructions.

Conclusion:

To avoid risks of prolonged or inadequate fasting in day care surgical patients, good coordination between the anaesthetist and the surgeon and an updated knowledge about the preoperative fasting instructions among the health-care providers is essential. Separate written fasting instructions for liquids and solids should be given to the parents according to their order in the operating list to ensure better compliance with fasting instructions.

[Perioperative fluid management]

An appropriate perioperative infusion management is pivotal for the perioperative outcome of the patient. Optimization of the perioperative fluid treatment often results in enhanced postoperative outcome, reduced perioperative complications and shortened hospitalization. Hypovolemia as well as hypervolemia can lead to an increased rate of perioperative complications. The main goal is to maintain perioperative euvolemia by goal-directed therapy (GDT), a combination of fluid management and inotropic medication, to optimize perfusion conditions in the perioperative period; however, perioperative fluid management should also include the preoperative and postoperative periods. This encompasses the preoperative administration of carbohydrate-rich drinks up to 2 h before surgery. In the postoperative period, patients should be encouraged to start per os hydration early and excessive i.v. fluid administration should be avoided. Implementation of a comprehensive multimodal, goal-directed fluid management within an enhanced recovery after surgery (ERAS) protocol is efficient but the exact status of indovodual items remains unclear at present.

Impact of an interdisciplinary malnutrition quality improvement project at a large metropolitan hospital

As many as 50% of hospitalised patients are estimated to be malnourished or at risk of malnutrition on hospital admission, but this condition often goes unrecognised, undiagnosed and untreated. Malnutrition is associated with an elevated need for continued medical interventions, higher costs of care and increased patient safety risks. Tampa General Hospital (TGH), a large teaching hospital in the southeastern USA, initiated a project to improve the quality of patient care at its institution. They did this first by focusing on improving the care quality for their malnourished patients (or patients who were at risk of malnourishment) and by using elements of the national Malnutrition Quality Improvement Initiative (MQii) Toolkit as a mechanism to measure and improve quality. The aim of this study was to evaluate the impact of quality improvement interventions on patient length of stay (LOS), infection rates and readmissions, particularly for malnourished patients. The structure of the MQii and the use of the MQii Toolkit helped staff members identify problems and systematically engage in quality improvement processes. Using the MQii Toolkit, TGH implemented a multipronged approach to improving the treatment of malnourished patients that involved creating interdisciplinary teams of staff and identifying gaps in care that could be improved through a series of changes to hospital-wide clinical workflows. They enhanced interdisciplinary coordination through increased dietitian engagement, the use of electronic health record alerts and new surgical protocols. These interventions lasted 8 months in 2016 and data reported here were collected from 985 patients before the interventions (2015) and 1046 patients after the interventions (2017). The study examines how these process changes affected LOS, infection rates and readmissions at TGH. Following implementation of these quality improvement processes, patients who were malnourished or at risk of malnutrition had a 25% reduction in LOS (from 8 to 6 days, p<0.01) and a 35.7% reduction in infection rates (from 14% to 9%, p<0.01). No statistically significant changes in readmission rates were observed. This study adds to a growing body of literature on quality improvement processes hospitals can undertake to better identify and treat malnourished patients. Hospitals and health systems can benefit from adopting similar institution-wide, quality improvement projects, while policy-makers' support for such programmes can spur more rapid uptake of nutrition-focused initiatives across care delivery settings.

Effects of an Individualized Fasting Program on Fasting Time and Comfort in Infants and Young Children During the Perioperative Period

PURPOSE

The study was designed to evaluate the effect of an individualized fasting program on fasting time and comfort in infants and young children during the perioperative period.

DESIGN

A quasiexperimental design was used.

METHODS

The study included 675 children (intervention = 353, control = 322). Data collection tools included Characteristics of Children Form and the Infant Hunger Rating Scale. The fasting program included individualized fasting education and fasting in batches. On the day of the operation, clear liquids were fed 2 hours before surgery and refed after the patient woke after surgery.

FINDINGS

The duration of perioperative fasting and the time to refeeding were shorter, the hunger scores were lower in the intervention group than those in the control group (P < .05). There was no difference in the incidence of vomiting between the two groups (P > .05), and no coughing and bloating occurred.

CONCLUSIONS

The fasting program for infants and young children can shorten the duration of fasting and can reduce the degree of hunger. This program is safe and feasible.

Perioperative care of the obese patient

Background

Obesity has become an increasing problem worldwide during the past few decades. Hence, surgeons and anaesthetists will care for an increasing number of obese patients in the foreseeable future, and should be prepared to provide optimal management for these individuals. This review provides an update of recent evidence regarding perioperative strategies for obese patients.

Methods

A search for papers on the perioperative care of obese patients (English language only) was performed in July 2019 using the PubMed, Scopus, Web of Science and Cochrane Library electronic databases. The review focused on the results of RCTs, although observational studies, meta-analyses, reviews, guidelines and other reports discussing the perioperative care of obese patients were also considered. When data from obese patients were not available, relevant data from non-obese populations were used.

Results and conclusion

Obese patients require comprehensive preoperative evaluation. Experienced medical teams, appropriate equipment and monitoring, careful anaesthetic management, and an adequate perioperative ventilation strategy may improve postoperative outcomes. Additional perioperative precautions are necessary in patients with severe morbid obesity, metabolic syndrome, untreated or severe obstructive sleep apnoea syndrome, or obesity hypoventilation syndrome; patients receiving home ventilatory support or postoperative opioid therapy; and obese patients undergoing open operations, long procedures or revisional surgery.

The application of enhanced recovery after surgery for upper gastrointestinal surgery: Meta-analysis

BACKGROUND

Although enhanced recovery after surgery (ERAS) has made great progress in the field of surgery, the guidelines point to the lack of high-quality evidence in upper gastrointestinal surgery.

METHODS

Randomized controlled trials in four electronic databases that involved ERAS protocols for upper gastrointestinal surgery were searched through December 12, 2018. The primary endpoints were lung infection, urinary tract infection, surgical site infection, postoperative anastomotic leakage and ileus. The secondary endpoints were postoperative length of stay, the time from end of surgery to first flatus and defecation, and readmission rates. Subgroup analysis was performed based on the type of surgery.

RESULTS

A total of 17 studies were included. The results of the meta-analysis indicate that there was a decrease in rates of lung infection (RR = 0.50, 95%CI: 0.33 to 0.75), postoperative length of stay (MD = -2.53, 95%CI: - 3.42 to - 1.65), time until first postoperative flatus (MD = -0.64, 95%CI: - 0.84 to - 0.45) and time until first postoperative defecation (MD = -1.10, 95%CI: - 1.74 to - 0.47) in patients who received ERAS, compared to conventional care. However, other outcomes were not significant difference. There was no significant difference between ERAS and conventional care in rates of urinary tract infection (P = 0.10), surgical site infection (P = 0.42), postoperative anastomotic leakage (P = 0.45), readmissions (P = 0.31) and ileus (P = 0.25).

CONCLUSIONS

ERAS protocols can reduce the risk of postoperative lung infection and accelerating patient recovery time. Nevertheless, we should also consider further research ERAS should be performed undergoing gastrectomy and esophagectomy.

Thirsty work: Exploring children's experiences of preoperative fasting

BACKGROUND

Preoperative fasting is performed to reduce aspiration risk during general anesthesia. Recommendations are that patients should fast for 6 hours from solids and nonhuman milk, 4 hours from breast milk, and 2 hours from clear fluids. However, previous studies have shown that children fast far in excess of these times, which can result in perioperative complications and unnecessary discomfort for the child.

AIMS

This prospective, mixed-methods study aims to explore the experiences of pediatric patients undergoing preoperative fasting in Leeds General Infirmary. It also aims to investigate fasting durations of these patients and factors which influence these.

METHODS

Over 2 weeks, surveys were distributed to all parents of elective pediatric patients and completed prior to their child being called to theater. Children over the age of six were offered a child survey, which had been specifically developed for the study, with visual Likert scales and an area for free text. The gathering of children's comments about their experience of preoperative fasting is unique to this study.

RESULTS

Seventy-one parent surveys and 48 child surveys were completed, with a mean patient age of 8.3 years (SD 4.1). The mean preoperative fasting time for food was 11.7 hours (SD 4.4) and 6.9 hours (SD 5.0) for fluids. Fasting times were far in excess of the minimums recommended, negatively impacting patient experience with 34% reporting being hungry/very hungry and 19% thirsty/very thirsty. Most children's comments suggested that they coped well with the fasting; however, several children reported feelings of sadness and anxiety.

CONCLUSION

Preoperative fasting times in pediatric patients far exceed the durations set by international guidelines. Given that many children reported extreme feelings of hunger and thirst or emotional effects from the fast, these durations need to be optimized in order to improve patient experience.

[Medical Dispute Related to Gastrointestinal Endoscopy Complications: Prevention and Management]

Because gastrointestinal (GI) endoscopy examinations are being performed increasingly frequently, the rate of detection of cancer and of precancerous lesions has increased. Moreover, development of more advanced endoscopic technologies has expanded the indications for, and thus frequency of, therapeutic endoscopic procedures. However, the incidence of complications associated with diagnostic or therapeutic GI endoscopy has also increased. The complications associated with GI endoscopy can be ameliorated by endoscopic or conservative treatment, but caution is needed as some of the more serious complications, such as perforation, can lead to death. In this chapter, we review the possible complications of GI endoscopy and discuss methods for their prevention and treatment.

A Pilot Quality Improvement Project to Reduce Preoperative Fasting Duration in Pediatric Inpatients

Supplemental Digital Content is available in the text.

Despite guidelines allowing clear liquids up to 2 hours before anesthesia, preoperative fasting for pediatric inpatients is often unnecessarily prolonged. This delay can lead to prolonged recovery time and increased postoperative pain. Efforts to reduce fasting duration in pediatric surgical patients is an evolving standard in pediatric anesthesiology. The primary aim of this quality improvement project was to reduce the average inpatient fasting duration undergoing anesthesia by 25% within a year of our pilot intervention. Secondary aims included measuring the adoption rate of the intervention and comparing aspiration rates as a balancing measure.

Comparison of Bowel Cleansing Efficacy, Safety, Bowel Movement Kinetics, and Patient Tolerability of Same-Day and Split-Dose Bowel Preparation Using 4 L of Polyethylene Glycol: A Prospective Randomized Study

BACKGROUND

Split-dose bowel preparation is recommended for morning colonoscopy, although a same-day dose regimen is an alternative for afternoon colonoscopy. Same-day preparation for morning colonoscopy has rarely been evaluated.

OBJECTIVE

We compared the bowel cleansing efficacy, bowel movement kinetics, safety profile, and patient tolerability of split-dose and same-day preparation using 4-L polyethylene glycol.

DESIGN

This was a prospective, randomized, assessor-blinded study.

SETTINGS

This study was performed at a tertiary center in Korea.

PATIENTS

Study subjects were randomly assigned to the same-day or split-dose groups. For the same-day dose group, 4 L of polyethylene glycol were ingested on the day of colonoscopy starting at 5:00 AM for morning colonoscopy or 7:00 AM for afternoon colonoscopy. In the split-dose group, 2 L of polyethylene glycol were ingested at 9:00 PM the day before colonoscopy, and the remaining 2 L from 7:00 AM for morning colonoscopy or from 10:00 AM for afternoon colonoscopy. Colonoscopy was performed from 10:00 AM.

MAIN OUTCOME MEASURES

The efficacy of bowel cleansing was evaluated using the Boston bowel preparation scale. The participants completed questionnaires asking about adverse events, bowel movement kinetics, and tolerability of the preparation before colonoscopy.

RESULTS

A total of 339 subjects were included (same-day dose = 172; split dose = 167). One subject in each group did not undergo colonoscopy. The rate of successful cleansing did not differ between the groups (same-day dose = 98.8% vs split dose = 98.2%; p = 0.681). There were no instances of hemodynamic instability or aspiration in either group. Tolerability, including overall satisfaction and willingness to reuse, were comparable between the groups.

LIMITATIONS

This was a single-center study.

CONCLUSIONS

The bowel cleansing efficacy, safety profile, and tolerability of same-day dosing with polyethylene glycol were comparable with those of split dose. Therefore, same-day dosing with 4 L of polyethylene glycol is a feasible bowel preparation method. See Video Abstract at http://links.lww.com/DCR/B44. COMPARACIÓN DE LA EFICACIA DE LA LIMPIEZA INTESTINAL, LA SEGURIDAD, LA CINÉTICA DEL MOVIMIENTO INTESTINAL Y LA TOLERABILIDAD DEL PACIENTE DE LA PREPARACIÓN INTESTINAL EN EL MISMO DÍA Y EN DOSIS DIVIDIDAS UTILIZANDO 4 L DE POLIETILENGLICOL: UN ESTUDIO PROSPECTIVO ALEATORIZADO: Se recomienda la preparación del intestino en dosis divididas para la colonoscopia de la mañana, aunque un régimen de una sola dosis el mismo día es una alternativa para la colonoscopia en la tarde. La preparación de una sola dosis el mismo día para la colonoscopia matutina rara vez se ha evaluado.Comparamos la eficacia de la limpieza intestinal, la cinética del movimiento intestinal, el perfil de seguridad y la tolerabilidad del paciente de la dosis dividida y la preparación el mismo día utilizando 4 L de polietilenglicol.Este fue un estudio prospectivo, aleatorizado, cegado por el evaluador.Este estudio se realizó en un centro terciario en Corea.Los sujetos del estudio fueron asignados aleatoriamente a el grupo de una dosis en el mismo día o al grupo de dosis dividida. Para el grupo de dosis del mismo día, se ingirieron 4 L de polietilenglicol el día de la colonoscopia a partir de las 5 a.m. para la colonoscopia de la mañana o las 7 a.m. para la colonoscopia de la tarde. En el grupo de dosis dividida, se ingirieron 2 L de polietilenglicol a las 9 p.m. el día anterior a la colonoscopia, y los otros 2 L restantes a partir de las 7 a.m. para la colonoscopia de la mañana o desde las 10 a.m. para la colonoscopia de la tarde. La colonoscopia se realizó a partir de las 10 a.m.La eficacia de la limpieza intestinal se evaluó mediante la escala de preparación intestinal de Boston. Los participantes completaron cuestionarios preguntando sobre los eventos adversos, la cinética del movimiento intestinal y la tolerabilidad de la preparación antes de la colonoscopia.Se incluyeron un total de 339 sujetos (dosis el mismo día, 172; dosis dividida, 167). Un sujeto en cada grupo no se sometió a colonoscopia. La tasa de limpieza exitosa no difirió entre los grupos (dosis el mismo día, 98.8% versus dosis dividida, 98.2%; p = 0.681). No hubo casos de inestabilidad hemodinámica o aspiración en ninguno de los grupos. La tolerabilidad, incluida la satisfacción general y la voluntad de reutilización, fueron comparables entre los grupos.Este fue un estudio de centro único.La eficacia de la limpieza intestinal, el perfil de seguridad y la tolerabilidad de la dosificación en el mismo día con polietilenglicol fueron comparables con los de la dosis dividida. Por lo tanto, la dosificación en el mismo día con 4 L de polietilenglicol es un método factible de preparación intestinal. Vea el video del resumen en http://links.lww.com/DCR/B44.

Effect of Cricoid Pressure Compared With a Sham Procedure in the Rapid Sequence Induction of Anesthesia: The IRIS Randomized Clinical Trial

Importance

The use of cricoid pressure (Sellick maneuver) during rapid sequence induction (RSI) of anesthesia remains controversial in the absence of a large randomized trial.

Objective

To test the hypothesis that the incidence of pulmonary aspiration is not increased when cricoid pressure is not performed.

Design, Setting, and Participants

Randomized, double-blind, noninferiority trial conducted in 10 academic centers. Patients undergoing anesthesia with RSI were enrolled from February 2014 until February 2017 and followed up for 28 days or until hospital discharge (last follow-up, February 8, 2017).

Interventions

Patients were assigned to a cricoid pressure (Sellick group) or a sham procedure group.

Main Outcomes and Measures

Primary end point was the incidence of pulmonary aspiration (at the glottis level during laryngoscopy or by tracheal aspiration after intubation). It was hypothesized that the sham procedure would not be inferior to the cricoid pressure. The secondary end points were related to pulmonary aspiration, difficult tracheal intubation, and traumatic complications owing to the tracheal intubation or cricoid pressure.

Results

Of 3472 patients randomized, mean (SD) age was 51 (19) years and 1777 (51%) were men. The primary end point, pulmonary aspiration, occurred in 10 patients (0.6%) in the Sellick group and in 9 patients (0.5%) in the sham group. The upper limit of the 1-sided 95% CI of relative risk was 2.00, exceeding 1.50, failing to demonstrate noninferiority (P = .14). The risk difference was -0.06% (2-sided 95% CI, -0.57 to 0.42) in the intent-to-treat population and -0.06% (2-sided 95% CI, -0.56 to 0.43) in the per protocol population. Secondary end points were not significantly different among the 2 groups (pneumonia, length of stay, and mortality), although the comparison of the Cormack and Lehane grade (Grades 3 and 4, 10% vs 5%; P <.001) and the longer intubation time (Intubation time >30 seconds, 47% vs 40%; P <.001) suggest an increased difficulty of tracheal intubation in the Sellick group.

Conclusions and Relevance

This large randomized clinical trial performed in patients undergoing anesthesia with RSI failed to demonstrate the noninferiority of the sham procedure in preventing pulmonary aspiration. Further studies are required in pregnant women and outside the operating room.

Trial Registration

ClinicalTrials.gov Identifier: NCT02080754.

Nutrition in Hip Fracture Units: Contemporary Practices in Preoperative Supplementation

Introduction:

Patients with hip fractures pose a significant burden on health services. Malnutrition, frailty, and cognitive impairment are common, and key to addressing the needs of this vulnerable patient group is nutrition optimization, including reduction in arbitrary nil by mouth (NBM) perioperative regimens. In order to understand current practices, we characterize preoperative nutrition in a regional hip fracture population.

Methods:

Prospective data were submitted to the National Hip Fracture Database by 6 hospitals in the north east of England over a 6-month period. Patients were stratified by preoperative nutritional intake, frailty, and cognitive function.

Results:

In all, 24.2% (n = 205) patients received no oral intake at all preoperatively; 15.3% of NBM patients were at risk of malnutrition; and 6.9% were malnourished at the time of assessment. Median time to surgery for NBM patients was 16.75 hours, and 6.34% of patients were fasted with no intake for >36 hours. In all, 6.5% (n = 44) of patients with an Abbreviated Mental Test Score (AMTS) of 8 or above were deemed to be at risk of malnutrition at admission, compared to 11.3% (n = 50) of patients with an AMTS of 7 or below. The NBM patients had similar mean Rockwood (4.97) and AMTS (6.51) scores to patients given oral nutrition.

Conclusion:

We have demonstrated contemporary preoperative nutritional practices in the management of over 800 hip fracture patients. Contrary to perception, nutrition practices vary little when stratified for age, cognition frailty, or comorbid burden. We have identified widespread prolonged NBM fasting and undersupplementation in patients sustaining hip fracture across a region. This work suggests a need to focus less on patient factors and more on systematic practices.

Effectiveness and safety of perioperative enteral feeding in patients with burn injuries: a systematic review protocol

OBJECTIVE

The objective of this review is to determine whether perioperative enteral feeding improves outcomes in patients with burns.

INTRODUCTION

Literature has identified many positive benefits of nutrition support for patients with burn injuries, including preservation of lean body mass, improved wound healing, reduced gastrointestinal permeability and enhanced immunity. Fasting for surgery can undermine the nutritional care of these patients by causing nutrient deficits. It may also negatively affect patient well-being and insulin resistance. Perioperative fasting is intended to protect patients from regurgitation and pulmonary aspiration. This research aims to investigate whether perioperative feeding impacts outcomes in patients with burn injuries.

INCLUSION CRITERIA

This systematic review will consider studies whose participants have a burn injury. The intervention is perioperative enteral feeding (either intragastric or post-pyloric). Patients who received perioperative feeding will be compared with patients who had enteral nutrition withheld during the perioperative period. A number of outcome measures will be investigated, including mortality, length of stay, wound infection, wound healing rate and aspiration pneumonia.

METHODS

The key databases searched will be PubMed, CINAHL, Embase, Web of Science and Cochrane Central Register of Controlled Trials and Scopus. Only studies published in English will be considered. There will be no date limits. Full texts of selected studies will be retrieved and assessed against inclusion criteria. Studies that do not meet the inclusion criteria will be excluded, with reasons provided. Data synthesis will be pooled in a statistical meta-analysis. Subgroup analysis will be conducted where possible. Where statistical pooling is not possible, the findings will be presented in narrative form.

SYSTEMATIC REVIEW REGISTRATION NUMBER

PROSPERO CRD42018119034.

Identifying the factors for improving quality of oral fluorescein angiography

AIM

To evaluate the quality of oral fluorescein angiography (FA) in relation to food intake.

METHODS

This is an observational, case-crossover study. We collected information from patients undergoing routine oral FA for retinal disease at the Shiley Eye Institute. Eighty patients (160 eyes) were analysed. Fasting and non-fasting images of the same patient were recorded, compared and analysed for different image quality parameters and clinical relevance by experienced retina specialists.

RESULTS

When analysing the images, intergrader agreement was moderate to good with a Kappa averaging 0.60 (0.5-0.85). When patients were fasting pre-imaging, better angiography quality scores were achieved when compared with images taken when patients were non-fasting (mean 0.84 vs 0.72, p<0.001). Multivariate analysis showed that non-fasting patients with higher body mass index had the worst scores. Other clinical parameters, such as staining of drusen, staining of disciform scars or central and peripapillary atrophy, were also significantly better during the pre-fasting exam (p<0.001). Oral FA was approximately 22% faster (time to fluorescein dye appearance) under fasting conditions than non-fasting (mean±SD, minutes, 18.7±6.9 vs 25.14±8.1, p<0.001).

CONCLUSION

Fasting oral FA provided significantly better quality images as well as faster optimal imaging times when compared with non-fasting oral FA. By improving its overall quality, oral FA could be a useful adjunctive examination to optical coherence tomography (OCT) and OCT angiography in patients who require FA studies but who have difficult access or refuse an invasive procedure.

"Full Stomach" Despite the Wait: Point-of-care Gastric Ultrasound at the Time of Procedural Sedation in the Pediatric Emergency Department

OBJECTIVES

The objective was to use gastric point-of-care ultrasound (POCUS) to assess gastric contents and volume, summarize the prevalence of "full stomach," and explore the relationship between fasting time and gastric contents at the time of procedural sedation.

METHODS

This was a prospective study of patients aged 2 to 17 years fasting prior to procedural sedation. A single sonographer scanned each patient's gastric antrum in two positions: supine with the upper body elevated and right lateral decubitus (RLD). Gastric content (empty, liquid, or solid) was noted, and the gastric volume (mL/kg) was estimated from antral cross-sectional area (CSA). "Full stomach" was defined as any solid content or >1.2 mL/kg of liquid gastric content.

RESULTS

We enrolled 116 subjects, with a median fasting time of 5.8 hours. Of the 107 with evaluable images, 74 patients, 69% (95% confidence interval [CI] = 60%-77%), were categorized as having a full stomach. Each hour of fasting was associated with lower odds (odds ratio = 0.79, 95% CI = 0.65-0) of a full stomach. However, the knowledge of fasting time alone provides little ability to discriminate between risk groups (C-index = 0.66).

CONCLUSIONS

Gastric POCUS classified many patients as having a full stomach at the time of expected procedural sedation, despite prolonged fasting times. These findings may inform risk-benefit considerations when planning the timing and medication choice for procedural sedation.

Quality improvement project to reduce pediatric clear liquid fasting times prior to anesthesia

BACKGROUND

Unnecessarily long preprocedural fasting can cause suffering and distress for children and their families. Institutional fasting policies are designed to consistently achieve minimum fasting times, often without regard to the extent to which actual fasting times exceed these minimums. Children at our hospital frequently experienced clear liquid fasting times far in excess of required minimums.

AIMS

The aim of this study was to utilize quality improvement methodology to reduce excess fasting times, with a goal of achieving experienced clear liquid fasting times ≤4 hours for 60% of our patients.

METHODS

This quality improvement project was conducted between July 2017 and August 2018. A multidisciplinary team performed a series of Plan-Do-Study-Act cycles focused on children undergoing elective procedures at a large children's hospital. Key drivers for clear liquid fasting times and relevant balancing measures were identified. Data were analyzed using control charts and statistical process control methods.

RESULTS

Approximately 16 000 children were involved in this project. Over the course of the project, the percentage of children with goal clear liquid fasting times improved from the baseline of 20%-63%, with a change in the mean fasting time from 9 hours to 6 hours. There were no significant effects on balancing measures (case delays/cancellations and clinically significant aspiration events).

CONCLUSION

Using quality improvement methodology, we safely improved the duration of preoperative fasting experienced by our patients. Our results provide additional data supporting the safety of more permissive 1-hour clear liquid fasting minimums. We suggest other institutions pursue similar efforts to improve patient and family experience.

Pharmacogenomic considerations for medications in the perioperative setting

Several high-profile examples of adverse outcomes from medications used in the perioperative setting are well known (e.g., malignant hyperthermia, prolonged apnea, respiratory depression, inadequate analgesia), leading to an increased understanding of genetic susceptibilities underlying these risks. Pharmacogenomic information is increasingly being utilized in certain areas of medicine. Despite this, routine preoperative genetic screening to inform medication risk is not yet standard practice. In this review, we assess the current readiness of pharmacogenomic information for clinical consideration for several common perioperative medications, including description of key pharmacogenes, pharmacokinetic implications and potential clinical outcomes. The goal is to highlight medications for which emerging or considerable pharmacogenomic information exists and identify areas for future potential research.

Benefits of Fasting Abbreviation with Carbohydrates and Omega-3 Infusion During CABG: a Double-Blind Controlled Randomized Trial

Objective

To assess postoperative clinical data considering the association of preoperative fasting with carbohydrate (CHO) loading and intraoperative infusion of omega-3 polyunsaturated fatty acids (ω-3 PUFA).

Methods

57 patients undergoing coronary artery bypass grafting (CABG) were randomly assigned to receive 12.5% maltodextrin (200 mL, 2 h before anesthesia), (CHO, n=14); water (200 mL, 2 h before anesthesia), (control, n=14); 12.5% maltodextrin (200 mL, 2 h before anesthesia) plus intraoperative infusion of ω-3 PUFA (0.2 g/kg), (CHO+W3, n=15); or water (200 mL, 2 h before anesthesia) plus intraoperative infusion of ω-3 PUFA (0.2 g/kg), (W3, n=14). The need for vasoactive drugs was analyzed, in addition to postoperative inflammation and metabolic control.

Results

There were two deaths (3.5%). Patients in CHO groups presented a lower incidence of hospital infection (RR=0.29, 95% CI 0.09-0.94; P=0.023), needed fewer vasoactive drugs during surgery and ICU stay (P<0.05); and had better blood glucose levels in the first six hours of recovery (P=0.015), requiring less exogenous insulin (P=0.018). Incidence of postoperative atrial fibrillation (POAF) varied significantly among groups (P=0.009). Subjects who receive ω-3 PUFA groups had fewer occurrences of POAF (RR=4.83, 95% CI 1.56-15.02; P=0.001). Patients in the W3 group had lower ultrasensitive-CRP levels at 36 h postoperatively (P=0.008). Interleukin-10 levels varied among groups (P=0.013), with the highest levels observed in the postoperative of patients who received intraoperative infusion of ω-3 PUFA (P=0.049).

Conclusion

Fasting abbreviation with carbohydrate loading and intraoperative infusion of ω-3 PUFA is safe and supports faster postoperative recovery in patients undergoing on-pump CABG.

Effects of Preoperative Oral Carbohydrates on Quality of Recovery in Laparoscopic Cholecystectomy: A Randomized, Double Blind, Placebo-Controlled Trial

BACKGROUND

While carbohydrate loading is an important component of enhanced patient recovery after surgery, no study has evaluated the effects of preoperative carbohydrate loading after laparoscopic cholecystectomy (LC) on patient satisfaction and overall recovery. Thus, we aimed to investigate the impact of preoperative oral carbohydrates on scores from the quality of recovery 40-item (QoR-40) questionnaire after LC.

METHODS

A total of 153 adults who underwent LC were randomized into three groups. Group MN-NPO was fasted from midnight until surgery. Group No-NPO received 400 mL of a carbohydrate beverage on the evening before surgery, and a morning dose of 400 mL was ingested at least 2 h before surgery. Group Placebo received the same quantity of flavored water as for group No-NPO. The quality of recovery after general anesthesia was evaluated using QoR-40 questionnaire. Intraoperative hemodynamics were also evaluated.

RESULTS

There were no significant differences among the groups in terms of the pre- and postoperative global QoR-40 scores (P = 0.257). Group MN-NPO had an elevated heart rate compared to patients who ingested a preoperative beverage (groups No-NPO and Placebo; P = 0.0412).

CONCLUSIONS

The preoperative carbohydrate beverage did not improve quality of recovery using the QoR-40 questionnaire after general anesthesia for laparoscopic cholecystectomy compared to placebo or conventional fasting. However, the preoperative fasting group had a consistently increased heart rate during changes in body position that induced hypotension, which is likely a result of depletion of effective intravascular volume caused by traditional fasting over 8 h.

TRIAL REGISTRATION

Clinical trial.gov identifier: NCT02555020.

Comparison of Air-QⓇ insertion techniques in pediatric patients with fiber-optic bronchoscopic assessment: a prospective randomized control trial

Background

Air-Q^Ⓡ laryngeal mask airway (LMA) is a second-generation supraglottic airway device (SAD) providing adequate airway control despite the unfavorable airway anatomy in children. Several studies have assessed it as a conduit for tracheal intubation and compared its efficacy with that of other SADs, but there are no studies comparing the laryngeal view with midline and rotational insertion techniques of Air-Q. Therefore, this study compared the fiber-optic bronchoscopic (FOB) assessment of the Air-Q position using these two insertion techniques.

Methods

This randomized controlled trial included 80 patients of the American Society of Anesthesiologists physical status I/II of either sex (age group 5–12 years, weight 10–30 kg), who were scheduled for elective surgery in the supine position under general anesthesia. The patients were randomly subjected to rotational and midline technique groups (n = 40, each), and appropriate sized Air-Q, based on the weight of the patient, was inserted using the technique allocated to each patient. Time taken and number of attempts for successful insertion of the devices and any complications after removal of device were studied.

Results

FOB grade 1 (ideal position) was seen in 29/40 (72.5%) and 19/40 (47.5%) children subjected to the rotational and classic midline techniques, respectively (P = 0.045). The time taken to successfully insert the Air-Q was significantly lesser in the rotational technique group (7.2 ± 1.5 s) than in the classic midline technique group (10.2 ± 2.1 s) (P < 0.001), whereas complications were similar in both groups.

Conclusions

The rotational technique was associated with better FOB view, and was faster than the classic midline technique of Air-Q insertion in pediatric patients.

Guidelines for Monitoring and Management of Pediatric Patients Before, During, and After Sedation for Diagnostic and Therapeutic Procedures

The safe sedation of children for procedures requires a systematic approach that includes the following: no administration of sedating medication without the safety net of medical/dental supervision, careful presedation evaluation for underlying medical or surgical conditions that would place the child at increased risk from sedating medications, appropriate fasting for elective procedures and a balance between the depth of sedation and risk for those who are unable to fast because of the urgent nature of the procedure, a focused airway examination for large (kissing) tonsils or anatomic airway abnormalities that might increase the potential for airway obstruction, a clear understanding of the medication's pharmacokinetic and pharmacodynamic effects and drug interactions, appropriate training and skills in airway management to allow rescue of the patient, age- and size-appropriate equipment for airway management and venous access, appropriate medications and reversal agents, sufficient numbers of appropriately trained staff to both carry out the procedure and monitor the patient, appropriate physiologic monitoring during and after the procedure, a properly equipped and staffed recovery area, recovery to the presedation level of consciousness before discharge from medical/dental supervision, and appropriate discharge instructions. This report was developed through a collaborative effort of the American Academy of Pediatrics and the American Academy of Pediatric Dentistry to offer pediatric providers updated information and guidance in delivering safe sedation to children.

Anesthesia for pediatric ophthalmologic surgery

This review presents updated recommendations, based on existing clinical research, for anesthetic management of strabismus surgery in children. In children, unlike adults, eye surgery nearly always requires general anesthesia, even for brief procedures. Recommendations for preoperative anxiolysis, fasting guidelines, and management of upper respiratory infections are discussed. Airway considerations and the oculocardiac reflex are highlighted. The prevention of postoperative complications, including those related to opioid prescription therapy, is also addressed. Finally, given the 2016 warning from the Food and Drug Administration about anesthesia neurotoxicity in children, we discuss recent studies on anesthetic neurotoxicity in children undergoing general anesthesia.

Development and validation of a questionnaire for a survey on perioperative fasting practices in India

BACKGROUND AND AIMS

Perioperative fasting guidelines have been published and updated to standardise practices. Hence, Indian Society of Anaesthesiologists decided to conduct a survey to assess the fasting practices and the food habits across India, which would be subsequently used for developing preoperative fasting guidelines for the Indian population. We detail and discuss herewith the content validity of the questionnaire developed for the survey.

METHODS

Thirty-six questions related to perioperative fasting practices were framed based on the collected evidence and relevance to regional diet and concerns. Subsequently, an information sheet was prepared and sent to 10 experts to grade each question. The responses were tabulated, and item-wise content validity index (I-CVI), scale-wise content validity index (S-CVI) and modified kappa statistic were calculated in Microsoft Excel™ sheet.

RESULTS

Seven of the 10 experts completed the assessment and grading as per the instructions provided and submitted a completed proforma. S-CVI for relevance, simplicity, clarity and ambiguity was 0.72, 0.86, 0.72 and 0.72, respectively. S-CVI/average or average congruency percentagewas 0.95, 0.97, 0.95 and 0.95 for relevance, simplicity, clarity and ambiguity, respectively. Question 2 received an I-CVI of 0.71 in terms of clarity and question 23 received an I-CVI of 0.71. They were modified as persuggestions of the experts.

CONCLUSION

We conclude that our questionnaire designed to ascertain the preoperative fasting practices for a surveymet the content validity criteria both by qualitative and quantitative analyses.

Development and validation of a questionnaire for a survey on perioperative fasting practices in India

BACKGROUND AND AIMS

Perioperative fasting guidelines have been published and updated to standardise practices. Hence, Indian Society of Anaesthesiologists decided to conduct a survey to assess the fasting practices and the food habits across India, which would be subsequently used for developing preoperative fasting guidelines for the Indian population. We detail and discuss herewith the content validity of the questionnaire developed for the survey.

METHODS

Thirty-six questions related to perioperative fasting practices were framed based on the collected evidence and relevance to regional diet and concerns. Subsequently, an information sheet was prepared and sent to 10 experts to grade each question. The responses were tabulated, and item-wise content validity index (I-CVI), scale-wise content validity index (S-CVI) and modified kappa statistic were calculated in Microsoft Excel™ sheet.

RESULTS

Seven of the 10 experts completed the assessment and grading as per the instructions provided and submitted a completed proforma. S-CVI for relevance, simplicity, clarity and ambiguity was 0.72, 0.86, 0.72 and 0.72, respectively. S-CVI/average or average congruency percentagewas 0.95, 0.97, 0.95 and 0.95 for relevance, simplicity, clarity and ambiguity, respectively. Question 2 received an I-CVI of 0.71 in terms of clarity and question 23 received an I-CVI of 0.71. They were modified as persuggestions of the experts.

CONCLUSION

We conclude that our questionnaire designed to ascertain the preoperative fasting practices for a surveymet the content validity criteria both by qualitative and quantitative analyses.

Recommendations for good practice for sedation in assisted conception

Conscious sedation is a commonly used approach to provide pain relief during transvaginal oocyte retrieval. It has been shown to be effective with high levels of acceptability and patient satisfaction. Fundamental Standards and Development Standards in safe sedation practice have been set out by the Royal College of Anaesthetists and they recommend that Royal Colleges, in association with the relevant sub-specialty organizations, should develop guidelines on sedation methods appropriate to clinical practice in their sphere of influence. This Policy and Practice paper outlines the human resources and equipment necessary to optimize patients' safety for the administration of intravenous (I.V.) sedation in assisted conception units, based on the most current evidence and guidance available.

Intravenous Paracetamol in Adjunct to Intravenous Ketoprofen for Postoperative Pain in Children Undergoing General Surgery: A Double-Blinded Randomized Study

Background and objectives: The combination of non-steroidal anti-inflammatory drugs and paracetamol is widely used for pediatric postoperative pain management, although the evidence of superiority of a combination over either drug alone is insufficient. We aimed to find out if intravenous (i.v.) paracetamol in a dose of 60 mg kg^-1 24 h^-¹, given in addition to i.v. ketoprofen (4.5 mg kg^-1 24 h^-¹), improves analgesia, physical recovery, and satisfaction with postoperative well-being in children and adolescents following moderate and major general surgery. Materials and Methods: Fifty-four patients were randomized to receive either i.v. paracetamol or normal saline as a placebo in adjunct to i.v. ketoprofen. For rescue analgesia in patients after moderate surgery, i.v. tramadol (2 mg kg^-¹ up two doses in 24 h), and for children after major surgery, i.v. morphine-patient-controlled analgesia (PCA) were available. The main outcome measure was the amount of opioid consumed during the first 24 h after surgery. Pain level at 1 and over 24 h, time until the resumption of normal oral fluid intake, spontaneous urination after surgery, and satisfaction with postoperative well-being were also assessed. Results: Fifty-one patients (26 in the placebo group and 25 in the paracetamol group) were studied. There was no difference in required rescue tramadol doses (n = 11 in each group) or 24-h morphine consumption (mean difference (95% CI): 0.06 (⁻0.17; 0.29) or pain scores between placebo and paracetamol groups. In patients given morphine-PCA, time to normal fluid intake was faster in the paracetamol than the placebo subgroup: median difference (95% CI): 7.5 (1.3; 13.7) h, p = 0.02. Parental satisfaction score was higher in the paracetamol than the placebo group (mean difference: ⁻1.3 (⁻2.5; ⁻0.06), p = 0.04). Conclusions: There were no obvious benefits to opioid requirement or analgesia of adding regular intravenous paracetamol to intravenous ketoprofen in used doses. However, intravenous paracetamol may contribute to faster recovery of normal functions and higher satisfaction with postoperative well-being.

Incidence and risk factors of unplanned intubation during pediatric sedation for MRI

BACKGROUND

It is often difficult for the pediatric patient to cooperate or to remain immobile during MR scans. Therefore, sedation is usually needed for children.

PURPOSE

To evaluate the incidence and contributing factors of unanticipated intubation during sedation for MRI scan in children.

STUDY TYPE

Retrospective observational study.

POPULATION/SUBJECTS

In all, 1165 charts were reviewed retrospectively of patients who had been sedated by anesthesiologists at a single institution from May 2015 to June 2016.

ASSESSMENT

Patient's demographics, the region of the MRI scan, total amount of medication, duration of sedation, and any adverse event during MRI were assessed. The adverse events during sedation including airway obstruction, apnea, desaturation, bradycardia, and hypotension were also assessed.

STATISTICAL TESTS

Risk factors of unplanned intubation during MRI sedation were identified by univariate and multivariate analysis. Firth's exact logistic regression was used for univariate and multivariate analysis. According to the results from multiple logistic regression, a nomogram was developed to predict the risk.

RESULTS

A total of 1165 children aged 7 days to 18 years with sedation used during an MRI scan during the study period showed an incidence of unexpected intubation as ~2% (n = 23, 95% confidence interval [CI]; 0.0123, 0.0295). Multivariate logistic regression revealed the following risk factors of unplanned intubation: American Society of Anesthesiologists (ASA) class III patients (odds ratio [OR] 1.212, P < 0.001), premature birth (OR 2.317, P < 0.001), and the presence of gastroesophageal reflux disease (GERD) (OR 1.474, P < 0.001) or congenital heart disease (OR 1.118, P < 0.001).

DATA CONCLUSION

This study identified risk factors of unplanned intubation as follows: ASA class III patients, premature birth, and the presence of GERD or congenital heart disease. The physician should screen risk factors of unexpected intubation and maintain adequate sedation during MRI scans in pediatric patients. Level of Evidence 3. Technical Efficacy Stage 5. J. Magn. Reson. Imaging 2019;49:1053-1061.

Unexpectedly prolonged fasting and its consequences on elderly patients undergoing spinal anesthetics. A prospective observational study1

Purpose

To measure the preoperative fasting durations with respect to time of the day and its effect on vital parameters and electrocardiogram in elderly patients undergoing surgery under spinal anesthesia.

Methods

This study investigated 211 patients older than 60 years undergoing elective surgery under spinal anesthesia. Patients scheduled for surgery in morning hours (AM) and afternoon hours (PM) were compared. Patients fasting hours and repeated measurements of mean arterial pressure (MAP), heart rate (HR), peripheral oxygen saturation (Sp02) and the type and number of ischemic electrocardiogram (ECG) signs were recorded and compared [preoperative, zeroth, 2nd,5th,15th,30th minutes following spinal anesthesia(SA)].

Results

Mean fasting durations were 12±2.8 and 9.5±2.1 hours in AM group and 15.5±3.4 12.7±4.4 hours in PM group for foods and liquids respectively. ECG changes were significantly more frequent in PM group and body temperatures were significantly higher in AM group patients.

Conclusion

Our study has shown that fasting times in our population is far longer than recommended and fasting prolonged>15 hours is related to a transiently increased cardiac stress and mild hypothermia.

Estimation of Gastric Volume Before Anesthesia in Term-Pregnant Women Undergoing Elective Cesarean Section, Compared With Non-pregnant or First-Trimester Women Undergoing Minor Gynecological Surgical Procedures

BACKGROUND

Traditionally, intubation of pregnant women has been performed using a rapid sequence induction. This is due to the classical concept that women with more than 18 weeks of pregnancy (mid-second trimester) are always considered to have an increased risk of aspiration due to a number of factors, regardless of the fasting duration. Rapid sequence induction is associated with a higher rate of adverse events.

AIMS

Our study aimed to illuminate the hypothesis that there is no difference in gastric volume between term-pregnant women and non-pregnant or first-trimester pregnant women who were undergoing minor gynecological surgical procedures. Accordingly, we measured gastric volume and content before anesthesia in term-pregnant women undergoing elective cesarean section, and to compare it with non-pregnant or first-trimester pregnant women who were undergoing minor gynecological surgical procedures.

METHODS

In this single-center prospective study, the gastric volume and content were assessed by abdominal ultrasound (AUS) just prior to the scheduled procedure. AUS was performed in the sagittal or para-sagittal plain in the upright position and the stomach content was estimated according to the antral circumferential area. Group 1 consisted of 50 term-pregnant women scheduled for cesarean section. Group 2 consisted of 45 non-pregnant or first-trimester pregnant women who were scheduled for minor gynecologic procedure.

RESULTS

Despite significant longer fasting time prior to the interventional procedure in the non-pregnant or first-trimester women group, there was no significant difference in gastric volume between term-pregnant and first-trimester pregnant women (3.2 ± 0.97 cm2 vs 3.2 ± 0.79 cm2; P = .97). Gastric volume was small in the two groups.

CONCLUSION

Fasting gastric volume before cesarean section in term-pregnant women is small and is not different than in non-pregnant or first-trimester women undergoing minor gynecologic procedures. Ultrasound estimation of gastric volume is a reliable and easy-to-perform technique which might help in decision-making regarding the airway management prior to induction of anesthesia in pregnant women.

Audit of perioperative pain management in paediatric patients following tonsillectomy at a tertiary hospital in Johannesburg

Background: Adenotonsillectomy remains one of the most frequently performed surgical procedures in children. Despite improvements in anaesthetic and surgical techniques, severe pain is reported in as many as 25–50% of children. Pain assessment and knowledge of drug pharmacodynamics and pharmacokinetics in the paediatric patient, is a prerequisite for optimal care. Much has been written on perioperative pain management following tonsillectomy. However, no consensus has been reached on what the ideal analgesic regimen should be. This audit is a review of current practice at Chris Hani Baragwanath Academic Hospital. It aims to identify problems and develop possible solutions to improve anaesthetic practice. Methods: A prospective, contextual, descriptive study design using a data collection sheet was used on paediatric patients presenting for tonsillectomy. Results: Eighty-five patients aged three to 12 years of age, with ASA grading I or II, were enrolled in the study. The choice of anaesthetic was variable with a combination of simple analgesics, opioids and adjuvants. This affected postoperative pain scores. Snare dissection and monopolar cautery haemostasis, was the standard surgical technique. Surgical seniority influenced the duration of tonsillectomy, with an effect on postoperative pain scores. Conclusions: Audits are necessary to evaluate what resources are needed to optimise care. The occurrence of pain after tonsillectomy continues to be poorly managed. Appropriate premedication and fasting of clear fluids for no more than two hours, needs to be introduced. Where possible surgical technique should involve bipolar cautery and be limited to less than 45 minutes. A preemptive, multimodal, opioid-sparing anaesthetic should be routinely practised.

Comparative ultrasound study of gastric emptying between an isotonic solution and a nutritional supplement

Background and objectives

Preoperative fasting may lead to undesirable effects in the surgical patient in whom there is a stimulus to ingesting clear liquids until 2 hours before anesthesia. The aim of this study was to evaluate the gastric emptying of two different solutions using ultrasound.

Methods

In a prospective, randomized, blind study, 34 healthy volunteers ingested 200 mL of two solutions without residues in two steps: an isotonic solution with carbohydrates, electrolytes, osmolarity of 292 mOsm.L⁻¹, and 36 kcal; and other nutritional supplementation with carbohydrates, proteins, electrolytes, osmolarity of 680 mO.L⁻¹, and 300 kcal. After 2 hours, a gastric ultrasound was performed to assess the antrum area and gastric volume, and the relation of gastric volume to weight (vol.w⁻¹), whose value above 1.5 mL.kg⁻¹ was considered a risk for bronchoaspiration. A p-value <0.05 was considered statistically significant.

Results

There was a significant difference between all parameters evaluated 2 hours after the ingestion of nutritional supplementation compared to fasting. The same occurred when the parameters between isotonic solution and nutritional supplementation were compared 2 hours after ingestion. Only one patient had vol.w⁻¹ <1.5 mL.kg⁻¹ 2 hours after ingestion of nutritional supplementation; and only one had vol.w⁻¹ >1.5 mL.kg⁻¹ after ingestion of isotonic solution.

Conclusion

This study demonstrated that gastric emptying of equal volumes of different solutions depends on their constitution. Those with high caloric and high osmolarity, and with proteins present, 2 hours after ingestion, increased the gastric volumes, which is compatible with the risk of gastric aspiration.

Perioperative Fluid Management in the Enhanced Recovery after Surgery (ERAS) Pathway

Fluid management is an essential component of the Enhanced Recovery after Surgery (ERAS) pathway. Optimal management begins in the preoperative period and continues through the intraoperative and postoperative phases. In this review, we outline current evidence-based practices for fluid management through each phase of the perioperative period. Preoperatively, patients should be encouraged to hydrate until 2 hours prior to the induction of anesthesia with a carbohydrate-containing clear liquid. When mechanical bowel preparation is necessary, with modern isoosmotic solutions, fluid repletion is not necessary. Intraoperatively, fluid therapy should aim to maintain euvolemia with an individualized approach. While some patients may benefit from goal-directed fluid therapy, a restrictive, zero-balance approach to intraoperative fluid management may be reasonable. Postoperatively, early initiation of oral intake and cessation of intravenous therapy are recommended.

Implementation of Enhanced Recovery after Surgery (ERAS) Program in Perioperative Management of Gastric Cancer Surgery: a Nationwide Survey in Korea

Purpose

Despite its clinical benefits, enhanced recovery after surgery (ERAS) is less widely implemented for gastric cancer surgery. This nationwide survey investigated the current status of the implementation of ERAS in perioperative care for gastric cancer surgery in South Korea.

Materials and Methods

This survey enrolled 89 gastric surgeons from 52 institutions in South Korea. The questionnaire consisted of 24 questions about the implementation of the ERAS protocols in the management of gastric cancer surgery. The survey was carried out using an electronic form sent via email.

Results

Of the 89 gastric surgeons, 58 (65.2%) answered that they have knowledge of the concept and details of ERAS, 45 (50.6%) of whom were currently applying ERAS for their patients. Of the ERAS protocols, preoperative education (91.0%), avoidance of preoperative fasting (68.5%), maintenance of intraoperative normothermia (79.8%), thromboprophylaxis (96.5%), early active ambulation (64.4%), and early removal of urinary catheter (68.5%) were relatively well adopted in perioperative care. However, other practices, such as avoidance of preoperative bowel preparation (41.6%), provision of preoperative carbohydrate-rich drink (10.1%), avoidance of routine abdominal drainage (31.4%), epidural anesthesia (15.9%), single-dose prophylactic antibiotics (19.3%), postoperative high oxygen therapy (36.8%), early postoperative diet (14.6%), restricted intravenous fluid administration (53.9%), and application of discharge criteria (57.3%) were not very well adopted for patients.

Conclusions

Perioperative management of gastric cancer surgery is largely heterogeneous among gastric surgeons in South Korea. Standard perioperative care based on scientific evidence needs to be established to improve the quality of surgical care and patient outcomes.

Chewing gum for 1 h does not change gastric volume in healthy fasting subjects. A prospective observational study

STUDY OBJECTIVE

Perioperative fasting guidelines differ in their approaches to chewing gum in the preoperative period. Current recommendations range from canceling the surgery to proceeding with it. Given this lack of consensus, we performed gastric ultrasound assessments in healthy volunteers before and after a standardized period of chewing gum. The objective of our study was to determine if chewing gum for 1 h change the gastric volume.

DESIGN

Observational prospective analytical study.

SETTING

Bedside gastric ultrasound.

PATIENTS

Following institutional Review Board approval, 55 healthy (American Society of Anesthesiologists class I to II) fasted (non-surgical research) volunteers provided written informed consent to participate in the study. Morbid obesity, renal failure, diabetes mellitus, pregnancy and previous upper abdominal surgery were exclusion criteria.

INTERVENTIONS

Volunteers chewed gum for 1 h between the first and second assessment.

MEASUREMENTS

Four gastric ultrasound assessments were performed, the first one at baseline and then hourly thereafter.

MAIN RESULTS

Fifty-five healthy volunteers were studied. The proportion of subjects who presented a completely empty stomach (Grade 0 antrum) was similar at baseline and after 1 h of gum-chewing [81% vs. 84%, p = 0.19, CI 95% (-12%, 16%)]. Among those subjects who had visible fluid at baseline, the volume remained unchanged throughout the study period.

CONCLUSIONS

One hour of gum-chewing had no significant effect on the gastric fluid volume of healthy volunteers, suggesting that it may be safe for healthy subjects to chew gum prior to elective surgery.