Incidences and outcomes of intra-operative vs. postoperative paediatric cardiac arrest: A retrospective cohort study of 42 776 anaesthetics in children who underwent noncardiac surgery in a Thai tertiary care hospital.

BACKGROUND: The reported incidence of paediatric perioperative cardiac arrest (PPOCA) in most developing countries ranges from 2.7 to 22.9 per 10 000 anaesthetics, resulting in mortality rates of 2.0 to 10.7 per 10 000 anaesthetics. The definitions of 'peri-operative' cardiac arrest often include the intra-operative period and extends from 60 min to 48 h after anaesthesia completion. However, the characteristics of cardiac arrests, care settings, and resuscitation quality may differ between intra-operative and early postoperative cardiac arrests. OBJECTIVE: To compare the mortality rates between intraoperative and early postoperative cardiac arrests (<24 h) following anaesthesia for paediatric noncardiac surgery. DESIGN: A retrospective cohort study. SETTING: In a tertiary care centre in Thailand during 2014 to 2019, the peri-operative period was defined as from the beginning of anaesthesia care until 24 h after anaesthesia completion. PATIENTS: Paediatric patients aged 0 to 17 years who underwent anaesthesia for noncardiac surgery. MAIN OUTCOME MEASURES: Mortality rates. RESULTS: A total of 42 776 anaesthetics were identified, with 63 PPOCAs and 23 deaths (36.5%). The incidence (95% confidence interval) of PPOCAs and mortality were 14.7 (11.5 to 18.8) and 5.4 (3.6 to 8.1) per 10 000 anaesthetics, respectively. Among 63 PPOCAs, 41 (65%) and 22 (35%) occurred during the intra-operative and postoperative periods, respectively. The median [min to max] time of postoperative cardiac arrest was 3.84 [0.05 to 19.47] h after anaesthesia completion. Mortalities (mortality rate) of postoperative cardiac arrest were significantly higher than that of intra-operative cardiac arrest at 14 (63.6%) vs. 9 (22.0%, P = 0.001). Multivariate analysis of risk factors for mortality included emergency status and duration of cardiopulmonary resuscitation with adjusted odds ratio 5.388 (95% confidence interval (1.031 to 28.160) and 1.067 (1.016 to 1.120). CONCLUSIONS: Postoperative cardiac arrest resulted in a higher mortality rate than intra-operative cardiac arrest. A high level of care should be provided for at least 24 h after the completion of anaesthesia. TRIAL REGISTRATION: None. CLINICAL TRIAL NUMBER AND REGISTRY URL: NA.

The actual duration of preoperative fasting in pediatric patients, and its effects on hunger and thirst: a prospective observational study.

Background: Preoperative fasting time for food and clear liquid was recommended as 2 and 6 h to prevent pulmonary aspiration. Prolonged fasting led to ketosis, hypotension, and patient discomfort. This study aimed to investigate the actual duration of preoperative fasting in pediatric patients, its effects on hunger and thirst, and factors that influence hunger and thirst. Methods: This prospective observational study recruited participants aged 0-15 years who were scheduled for elective surgery or for other procedures to be performed under general anesthesia in a tertiary care center. All parents or participants were asked to report the fasting time for food and clear liquid. Participants aged 7-15 years self-rated their degree of hunger and thirst using a 0-10 scale. For participants aged less than 7 years, parents were asked to rate their child's degree of hunger based on the child's behavior. Dextrose-containing intravenous fluid administration and anesthesia start time were collected. Results: Three hundred and nine participants were included. The overall median [interquartile range; IQR] fasting duration for food and clear liquid was 11.1 h [IQR: 8.0, 14.0] and 10.0 h [IQR: 7.2, 12.5], respectively. The overall median hunger and thirst score was 7 [IQR: 5, 9] and 5 [IQR: 0, 7.5], respectively. High hunger score was reported in 76.4% of participants. There was no correlation between fasting time for food and hunger score [Spearman's rank correlation coefficient (Rho): -0.150, P=0.008], or between fasting time for clear liquid and thirst score (Rho: 0.007, P=0.955). Zero to 2-year-old participants had a significantly higher hunger score compared to older participants (P<0.001) and a higher proportion (80-90%) of high hunger score regardless of anesthesia start time. Although dextrose-containing fluid was administered ≥10 mL/kg, 85.7% of this group still reported high hunger score (P=0.008). Ninety percent of participants who had anesthesia start time after 12:00 PM reported high hunger score (P=0.044). Conclusions: The actual duration of preoperative fasting was found to be longer than the recommendation for both food and liquid in pediatric surgical population. Younger age group and anesthesia start time in the afternoon were factors associated with high hunger score.

Apneic oxygenation with low-flow oxygen cannula for rapid sequence induction and intubation in pediatric patients: a randomized-controlled trial.

Background: Classical rapid sequence induction and intubation (RSII) is used to reduce pulmonary aspiration, but it increases the risk of hypoxemia. Apneic oxygenation (ApOx) has been studied to prolong safe apneic time, and to decrease the incidence of hypoxemia in adults. The aim of this study was to investigate the effectiveness of ApOx via low-flow nasal cannula to reduce the incidence of hypoxemia in pediatric rapid sequence induction. Methods: This prospective single-blind randomized controlled trial included patients aged 0-7 years, American Society of Anesthesiologists (ASA) physical status 1 to 3, who underwent elective or emergency surgery under general anesthesia with rapid sequence induction during February 2020 to March 2021. Participants were randomized to the ApOx group or the classical rapid sequence induction group. The ApOx group received oxygen flow via regular nasal cannula, as follows: 1 liter per minute (LPM) in age 0-1 month, 2 LPM in age 1-12 months, and 4 LPM in age 1-7 years. The classical group did not receive oxygen supplementation during intubation. The primary outcome was the incidence of hypoxemia, defined as oxygen saturation (SpO2) ≤92%. Results: Sixty-four participants were recruited. The incidence of hypoxemia in both groups was 8 of 32 participants (25%) (P=1.000). Among desaturated patients, the median time to desaturation was 29.5 and 35 seconds in the ApOx and classical groups, respectively (P=0.527). The median lowest SpO2 was 91% and 88.5% in the ApOx and classical groups, respectively (P=0.079). In non-desaturated patients, the median time to successful intubation was 40.5 and 35.5 seconds in the ApOx and classical groups, respectively (P=0.069). Conclusions: In this small sample study, ApOx using age-adjusted low-flow nasal cannula was ineffective for reducing the incidence of hypoxemia in pediatric RSII. Trial Registration: Thai Clinical Trials Registry TCTR20210802002.

Effects of Sucrose and Nonnutritive Sucking on Pain Behavior in Neonates and Infants undergoing Wound Dressing after Surgery: A Randomized Controlled Trial.

INTRODUCTION: Wound dressing, a procedure that pediatric patients are commonly exposed to postoperatively, can cause strong physiological and pain behavioral responses despite being brief. This study evaluated the effects of using 24% sucrose plus a pacifier versus a pacifier alone to reduce the pain response from dressing wounds in neonates and infants. MATERIALS AND METHODS: Thirty-two neonates and infants who underwent surgery and required postoperative wound dressing were randomized to a pacifier group (n = 16) and a 24% sucrose plus pacifier group ("sucrose group"; n = 16). Demographic data, crying time, and pain behaviors were recorded using a video recorder. The pain behaviors were assessed independently using the neonatal infant pain scale (NIPS) by three assessors, who were expert in pediatric pain assessment and blinded to the subject allocations. RESULTS: Participants in the sucrose group were older than those in the pacifier group (6.19 ± 2.95 vs. 3.88 ± 3.2 months). While there were no differences in the NIPS scores of the two groups at 30, 120, and 240 seconds, the incidence of moderate-to-severe pain was lower in the sucrose group than the pacifier group at 120 seconds (37.5 vs. 50%). The crying time was lower in the sucrose group, but without statistical significance. CONCLUSION: The 24% sucrose plus pacifier was not superior to the pacifier alone in decreasing pain behavioral responses. Dressing wound pain produced a high-intensity pain behavioral response. A pain management strategy should be developed to lessen the postoperative procedural pain in pediatric patients.

Efficacy of surgical transversus abdominis plane block for postoperative pain relief following abdominal surgery in pediatric patients.

BACKGROUND: Transversus abdominis plane (TAP) block is a promising effective method for postoperative pain control after major abdominal surgery. Using a landmark technique, it is easily performed, but its popularity has decreased because of less efficacy due to inaccurate injection and the potential for intraperitoneal organ damage. Ultrasound-guided TAP block provides better results and less complications, but it requires experienced operators. Surgically administered TAP (sTAP) block is a simple technique and may cause less complications. This study was aimed to determine the efficacy of sTAP on postoperative pain control in pediatric patients following a major abdominal surgery, compared with local anesthetic infiltration and no block. METHODS: This stratified, randomized controlled trial was conducted in pediatric patients, below the age of 15 years, who underwent non-laparoscopic major abdominal surgery. Patients were allocated into three groups. The control group received no block; the LA group received 0.25% bupivacaine for local wound infiltration; and the sTAP group received 0.25% bupivacaine for TAP block performed by a surgeon before abdominal wall closure. Parameter records included the incidence of inadequate pain control, time to first analgesic, opioid requirement within 24 h, and complications of these techniques. RESULTS: Fifty-four patients were recruited. There was no significant difference in the incidence of inadequate pain control (P = 0.589). The median time to first analgesic was 380 min in the sTAP group compared with 370 and 420 min in the LA and control groups, respectively (95%CI = 193-567, 121-619, and 0-1012; P = 0.632). The median dose of total opioid requirement (calculated as fentanyl-equivalent dose) was 1.95, 2.05, and 2.04 µg·kg(-1) ·24 h(-1) in the sTAP, LA, and control groups, respectively (IQR = 0.65, 2.20; 0.59, 3.32; 0.38, 2.60; P = 0.723). No complications of sTAP block were detected. CONCLUSIONS: There was no significant advantage of the sTAP block over local infiltration or no intervention for postoperative pain control in pediatric patients undergoing non-laparoscopic major abdominal surgeries.

Effects of a restrictive fluid regimen in pediatric patients undergoing major abdominal surgery.

OBJECTIVE: To investigate the effects of restrictive fluid regimen during major abdominal surgery in pediatric patients. BACKGROUND: In adults, a restrictive and goal-directed regimen as opposed to a liberal-fluid regimen results in better outcomes after various major surgical procedures. The different ratio of body fluid distribution in pediatric patients from those of adults may influence different needs of fluid. METHODS: This stratified, randomized, controlled trial was conducted in 25 pediatric patients (mean age <3 years) undergoing major abdominal surgery. Patients were allocated to two groups based on their perioperative fluid management. 'control group' received maintenance plus deficit plus interstitial space replacement plus ongoing loss, whereas 'restrictive group' had a similar treatment, but were given no interstitial space replacement. Intraoperative fluid resuscitation was guided by hemodynamics and base excess. Parameters recorded included hemodynamic variables, the volume and type of intravenous fluid, blood chemistry (including lactate, base excess, and electrolyte), chest X-ray, body weight, complications, and return of bowel function. RESULTS: Patients in control group needed significantly less additional fluid for resuscitation compared to restrictive group (0.62 ± 3.51 ml · kg(-1) · h(-1) vs 5.04 ± 4.16 ml · kg(-1) · h(-1) ; P = 0.012). In restrictive group, heart rates were higher (P = 0.012) and base excess showed more negative results (P = 0.049). There were no differences between the groups in terms of the total volume requirement, postoperative kidney function, chest X-ray, variation of body weight and the postoperative outcomes. CONCLUSIONS: Volume preload corresponding with an estimated interstitial space replacement was suitable for application to pediatric patients undergoing major abdominal surgery.