Daily Anesthesiology Research Analysis
Three impactful anesthesiology papers stand out today. A meta-analysis shows intraoperative pain during cesarean delivery under neuraxial anesthesia is common (pooled 17%), with spinal/combined spinal-epidural outperforming epidural top-up. A randomized trial finds intranasal dexmedetomidine plus ketamine is a safe, effective alternative to chloral hydrate for pediatric procedural sedation. A national cohort analysis reveals higher bleeding, transfusion, venous thromboembolism, and markedly high
Summary
Three impactful anesthesiology papers stand out today. A meta-analysis shows intraoperative pain during cesarean delivery under neuraxial anesthesia is common (pooled 17%), with spinal/combined spinal-epidural outperforming epidural top-up. A randomized trial finds intranasal dexmedetomidine plus ketamine is a safe, effective alternative to chloral hydrate for pediatric procedural sedation. A national cohort analysis reveals higher bleeding, transfusion, venous thromboembolism, and markedly higher pharmacy costs in arthroplasty patients with hereditary bleeding disorders.
Research Themes
- Obstetric anesthesia: intraoperative pain under neuraxial techniques
- Pediatric procedural sedation alternatives to chloral hydrate
- Perioperative hemostasis and resource use in hereditary bleeding disorders
Selected Articles
1. Intraoperative Pain during Cesarean Delivery under Neuraxial Anesthesia: A Systematic Review and Meta-analysis.
Across 34 studies (11,351 patients), pooled patient-reported intraoperative pain during cesarean under neuraxial anesthesia was 17% (95% CI, 13–22). Spinal (14%) and combined spinal-epidural had lower pain incidence than epidural top-up (33%). About half of included studies had high risk of bias, underscoring the need for more rigorous prospective research.
Impact: Quantifies a clinically important and underrecognized complication that affects patient experience, safety, and medicolegal risk in obstetric anesthesia, with actionable differences by neuraxial technique.
Clinical Implications: Counsel patients about a nontrivial risk of intraoperative pain under neuraxial anesthesia; preferentially consider spinal or combined spinal-epidural over epidural top-up for cesarean when feasible; implement vigilant intraoperative testing and rescue analgesia protocols.
Key Findings
- Pooled intraoperative pain incidence under neuraxial anesthesia: 17% (95% CI, 13–22).
- Spinal anesthesia had the lowest pooled pain incidence: 14% (95% CI, 10–20; 662/8,002).
- Epidural top-up had the highest pooled pain incidence: 33% (95% CI, 17–54; 253/1,395).
- Approximately half of included studies were at high risk of bias.
Methodological Strengths
- Comprehensive multi-database search with predefined inclusion criteria
- Quantitative synthesis with pooled incidences and risk-of-bias assessment
Limitations
- High heterogeneity and high risk of bias in about half of included studies
- Limited patient-level data to adjust for confounders (eg, urgency, dosing, surgical factors)
Future Directions: Prospective, standardized, patient-centered studies to evaluate predictors, preventions, and intraoperative rescue strategies; incorporate patient-reported experience measures and medicolegal outcomes.
BACKGROUND: Neuraxial anesthesia is the definitive standard technique for cesarean delivery; however, pain during cesarean delivery may be underreported. The primary aim of this systematic review and meta-analysis was to determine the incidence of patient-reported intraoperative pain during cesarean delivery under neuraxial anesthesia. METHODS: A literature search of databases (PubMed, MEDLINE, Embase, Web of Science, Scopus, Cochrane Database of Systematic Reviews, and Central Register of Controlled Trials) was conducted. Search topics included terminology concerning cesarean delivery, neuraxial anesthesia, pain, and incide
2. Comparison of combined intranasal dexmedetomidine and ketamine versus chloral hydrate for pediatric procedural sedation: a randomized controlled trial.
In 128 analyzed children, intranasal dexmedetomidine+ketamine achieved similar 15-min sedation success as chloral hydrate but with significantly fewer complications (3.2% vs 16.7%). In children aged 1–7 years, it increased 15-min success (79.2% vs 51.6%) and reduced 30-min sedation failure (0% vs 29%). In infants <1 year, complications were also reduced.
Impact: Offers a practical, needle-free sedation alternative that reduces complications and improves timeliness of effective sedation in older infants/children, informing shifts away from chloral hydrate.
Clinical Implications: Consider intranasal dexmedetomidine (2 μg/kg) plus ketamine (3 mg/kg) for outpatient pediatric procedural sedation, especially in children 1–7 years, to lower adverse events and improve early sedation success; maintain monitoring for bradycardia/sedation depth.
Key Findings
- Overall 15-min sedation success was similar: 75.8% (IN DEXKET) vs 66.7% (CH), P=0.330.
- Overall complication rate was lower with IN DEXKET: 3.2% vs 16.7%, P=0.017.
- In children 1–7 years, 15-min success was higher (79.2% vs 51.6%, P=0.049) and 30-min failure lower (0% vs 29.0%, P=0.003) with IN DEXKET.
- In infants <1 year, complications were reduced with IN DEXKET (2.6% vs 22.9%, P=0.012).
Methodological Strengths
- Prospective, randomized, two-center design with standardized intranasal delivery
- Clinically relevant, time-bound primary and secondary endpoints with subgroup analyses
Limitations
- Single-blind design and modest sample size may limit generalizability
- Short-term outcomes; no long-term neurobehavioral follow-up
Future Directions: Head-to-head comparisons with other intranasal regimens and IV standards, dose-finding for different age strata, and evaluation of workflow, parental satisfaction, and cost-effectiveness.
BACKGROUND: We hypothesized that intranasal combination of dexmedetomidine (2 μg/kg) and ketamine (3 mg/kg) (IN DEXKET) improves the success rate of sedation in pediatric patients compared with chloral hydrate (CH; 50 mg/kg). METHODS: This prospective, two-center, single-blinded, randomized controlled trial involved 136 pediatric patients (aged < 7 years) requiring procedural sedation. The participants were randomized to receive CH or IN DEXKET via a mucosal atomizer device. The primary outcome was the success rate of sedation (Pediatric Sedation State Scale, scores 1-3) within 15 min. The secondary outcomes
3. Bleeding Complications, Transfusion, and Acute Care Costs After Major Arthroplasty in Patients With Hereditary Bleeding Disorders: A National Healthcare Database Analysis.
Among 1,528 hereditary bleeding disorder patients and 20,509 controls undergoing elective TKA/THA, bleeding complications were infrequent but higher in BDs (1.1% vs 0.2%; P<.0001). Transfusions were more likely in BD patients (THA OR 2.7; TKA OR 2.6). CFCs were used in 16.4% of BD patients, with pharmacy costs >30× controls. Venous thromboembolism risk was also higher (OR 3.9).
Impact: Defines perioperative risks and resource implications in a vulnerable population, informing individualized anemia management, CFC use, thromboprophylaxis, and budgeting.
Clinical Implications: Plan preoperative optimization and blood management for BD patients; tailor CFC and antifibrinolytics; anticipate higher transfusion and VTE risk with appropriate thromboprophylaxis; counsel on markedly higher pharmacy costs and coordinate with hematology.
Key Findings
- Bleeding complications higher in BD vs controls: 1.1% vs 0.2% (P<.0001).
- Transfusion odds increased in BD: THA OR 2.7 (95% CI 2.0–3.7), TKA OR 2.6 (95% CI 1.9–3.8); P<.0001 both.
- CFC exposure in BD 16.4% vs 0.03% in controls; most commonly FVIII (49.6%) and VWF (23.0%).
- Pharmacy costs markedly higher in BD: mean $23,792 vs $750 (>30×).
- VTE risk higher in BD: OR 3.9 (95% CI 2.4–6.1; P<.0001).
Methodological Strengths
- Large national database with substantial sample size and procedure stratification (TKA vs THA)
- Detailed capture of CFC exposure, antifibrinolytic use, and pharmacy costs
Limitations
- Retrospective design susceptible to residual confounding and coding misclassification
- Limited clinical granularity (eg, factor levels, inhibitor status, blood loss) and long-term outcomes
Future Directions: Prospective perioperative pathways with PBM bundles, risk-adjusted thromboprophylaxis trials, and cost-effectiveness analyses of targeted CFC/antifibrinolytic strategies.
BACKGROUND: Advances in blood conservation have reduced the need for allogeneic transfusions in total knee and hip arthroplasty (TKA/THA). This study aimed to assess whether perioperative bleeding complications, including hemorrhage/hematoma, allogeneic transfusions, and postoperative anemia, occurred at similar rates between patients with hereditary bleeding disorders (BDs) and controls. Using a national health care database, we assessed the use of clotting factor concentrates (CFCs), perioperative outcomes, and resource utilization. METHODS: A retrospective cohort study was conducted using the Premier