Daily Anesthesiology Research Analysis
Analyzed 115 papers and selected 3 impactful papers.
Summary
Today’s top anesthesiology research spans opioid stewardship and perioperative strategy. A multicenter RCT shows single-shot epidural ropivacaine with opioid-free IV-PCA slashes opioid consumption after lumbar spine surgery without worsening pain, while a large prospective case-control study identifies behavioral and clinical predictors of unintended prolonged opioid use. A 63,224-patient cohort analysis associates monitored anesthesia care with lower advanced postoperative healthcare utilization than general anesthesia.
Research Themes
- Opioid-sparing perioperative analgesia
- Risk stratification for unintended prolonged opioid use
- Anesthetic technique selection and postoperative resource utilization
Selected Articles
1. Single Epidural Analgesia With Opioid-free IV-PCA Reduces Opioid Consumption in Lumbar Spine Surgery: A Randomized, Multicenter Trial.
In a multicenter, double-blind RCT of 98 patients undergoing single-level lumbar surgery, a single-shot epidural ropivacaine plus opioid-free IV-PCA achieved similar pain scores to fentanyl-based IV-PCA but reduced fentanyl use by ~1,000–1,350 µg. Urinary retention was lower in the fusion subgroup. This protocol delivers effective analgesia while markedly sparing opioids.
Impact: Provides Level I evidence that a simple epidural strategy can dramatically reduce perioperative opioid exposure without compromising analgesia in common spine procedures.
Clinical Implications: Adopt single-shot epidural ropivacaine with opioid-free IV-PCA for single-level lumbar fusion/decompression to minimize opioid requirements and potentially reduce urinary retention, while maintaining analgesic efficacy.
Key Findings
- No clinically important differences in NRS pain scores between groups at any time point.
- Epidural group consumed far less fentanyl (fusion: 122 ± 140 vs 1467 ± 481 µg; decompression: 41 ± 51 vs 1046 ± 451 µg; both p < 0.001).
- Urinary retention was lower in the fusion arm with epidural (4% vs 32%; RR 0.13; p = 0.02).
Methodological Strengths
- Multicenter, randomized, double-blind, parallel-group design with intention-to-treat analysis.
- Prespecified MCID, adequate blinding of patients and assessors, and complete follow-up in both arms.
Limitations
- Modest sample size limits subgroup power and external generalizability.
- Pain differences did not exceed the MCID; outcomes limited to early postoperative period.
Future Directions: Test scalability in multi-level and complex spine surgeries, assess long-term functional outcomes and persistent opioid use, and compare against other regional techniques.
BACKGROUND: Postoperative pain management after lumbar spine surgery often involves modest to high doses of opioids, which can contribute to the risk of dependence. Epidural analgesia has emerged as a promising opioid-sparing alternative, but its efficacy compared with conventional opioid-based intravenous patient-controlled analgesia (IV-PCA) in a randomized trial has not been established in these patients. QUESTIONS/PURPOSES: We asked whether an opioid-sparing protocol, compared with conventional opioid-based IV-PCA, (1) provides superior pain control, (2) reduces opioid consumption, and (3) lowers the frequency of opioid-related adverse events. METHODS: In this multicenter, randomized, double-blind, parallel-group trial, we enrolled 98 patients undergoing single-level lumbar fusion or decompression...
2. Unintended prolonged opioid use: a prospective case-control study.
In 1,030 opioid-naive adults, repeated ED visits, certain prior surgeries, smoking history, daily OTC analgesic use, opioid craving, and higher pain interference were independently associated with unintended prolonged opioid use at 90 days. Postsurgical pain indication, prior pregnancy, greater widespread pain, and lower general activity were negatively associated. Urine drug testing verified exposure status.
Impact: Identifies modifiable behavioral and clinical predictors of unintended prolonged opioid use using prospective design with objective verification, informing perioperative risk stratification and targeted interventions.
Clinical Implications: Screen for high-risk features (e.g., frequent ED use, smoking, craving, high pain interference) before initiating opioids, tailor opioid-sparing multimodal analgesia, and deploy early behavioral and follow-up interventions to prevent transition to unintended prolonged use.
Key Findings
- Prospective case-control study with 513 UPOU cases and 517 controls at 90 days; opioid status verified by urine drug tests.
- Risk factors: ≥2 ED visits/year, prior spine/joint replacement/cataract surgery, current/former smoking, daily OTC analgesic use, opioid craving, greater pain interference.
- Negative associations: postsurgical pain indication for initial prescription, prior pregnancy, greater widespread pain, lower general activity.
Methodological Strengths
- Prospective design across three sites with standardized outcome window (90 days).
- Objective verification of opioid exposure via urine drug testing and multivariable adjustment.
Limitations
- Observational design cannot prove causality; residual confounding possible.
- Generalizability beyond enrolled sites and indications may be limited.
Future Directions: Develop and test risk calculators and targeted interventions (e.g., craving-focused behavioral programs, smoking cessation) to reduce unintended prolonged opioid use in perioperative pathways.
Appropriate short-term use of opioids in opioid-naive adults can result in unintended prolonged opioid use (UPOU) which is associated with significant morbidity and mortality. The objective of this prospective case-control study was to identify incident cases of UPOU and to compare their characteristics with patients who did not progress to UPOU. Opioid-naive adults receiving an initial opioid prescription for surgical or nonsurgical indications were recruited at 3 clinical sites. Patients progressing to UPOU (cases) were identified 90 days after the initial prescription and compared with patients who did not progress to UPOU (controls)...
3. Advanced healthcare utilisation after monitored anaesthesia care versus general anaesthesia: A real-world data analysis.
Among 63,224 adults undergoing procedures amenable to either MAC or GA, MAC was used in 46.8% and was associated with a lower risk of advanced postoperative healthcare utilization (composite of unplanned ICU admission within 7 days, 30-day readmission, or non-home discharge) after multivariable and inverse probability–weighted analyses.
Impact: Provides large-scale, adjusted real-world evidence to inform anesthetic technique selection across diverse procedures, linking MAC to reduced advanced postoperative resource utilization.
Clinical Implications: When both approaches are feasible, consider MAC to potentially reduce unplanned ICU admissions, readmissions, and non-home discharge, balancing airway risks and procedural needs.
Key Findings
- In 63,224 procedures, 46.8% received MAC and 53.2% GA.
- Overall, 11.1% experienced advanced postoperative healthcare utilization (unplanned ICU, 30-day readmission, or non-home discharge).
- MAC was associated with a lower risk of advanced postoperative healthcare utilization after multivariable and inverse probability–weighted regression adjustment.
Methodological Strengths
- Very large cohort with prespecified composite outcome and robust multivariable and IPW-adjusted analyses.
- Direct comparison of MAC versus GA across procedures where both are viable options.
Limitations
- Single-center retrospective design with potential residual confounding and selection bias.
- Granular intra-procedural respiratory events and aspiration risks may be undercaptured.
Future Directions: Prospective multicenter studies and pragmatic trials to validate causality, define procedure-specific benefits/risks, and incorporate patient-centered outcomes and cost-effectiveness.
BACKGROUND: For a large variety of surgeries and interventional procedures, monitored anaesthesia care (MAC) can be a viable alternative to general anaesthesia (GA). MAC can avoid risks associated with intubation and deep sedation while increasing the risk of aspiration and intra-procedural respiratory complications due to the lack of a definitive airway. It remains unclear how these competing risks impact postoperative complications and the level of healthcare utilisation after procedures where both approaches are viable options. METHODS: This retrospective cohort study included adult patients undergoing procedures feasible under MAC and GA at Beth Israel Deaconess Medical Center...