Daily Anesthesiology Research Analysis
Analyzed 130 papers and selected 3 impactful papers.
Summary
A cluster randomized crossover trial showed that unblinded continuous ward monitoring reduced cumulative postoperative desaturation time compared with intermittent checks. A double-blind RCT found glycopyrrolate (vs atropine) during neuromuscular reversal lowered postoperative delirium in older adults after laparoscopic colorectal surgery. In pediatric orchidopexy, a randomized trial demonstrated ultrasound-guided retrolaminar block provided more durable analgesia than caudal block with fewer rescue doses.
Research Themes
- Perioperative continuous monitoring and early detection
- Delirium prevention and anticholinergic choice during reversal
- Pediatric regional anesthesia and opioid-sparing analgesia
Selected Articles
1. Continuous vs Intermittent Postoperative Vital Sign Monitoring: A Cluster Randomized Crossover Trial.
In 798 postoperative ward patients, unblinded continuous monitoring decreased the duration of oxygen saturation <90% over 48 hours by about 30 minutes versus intermittent monitoring (geometric means ratio 0.86; 95% CI, 0.78-0.95). Durations of hypotension and tachycardia were not significantly reduced and intervention rates were similar. Findings support outcomes-focused trials of continuous ward monitoring.
Impact: This pragmatic cluster RCT provides high-quality evidence that continuous ward monitoring reduces desaturation burden, a plausible pathway to prevent serious complications.
Clinical Implications: Hospitals considering continuous ward monitoring can expect reduced cumulative hypoxemia time with alert-driven protocols; implementation should be paired with escalation pathways and evaluated for patient-centric outcomes and cost-effectiveness.
Key Findings
- Continuous unblinded monitoring reduced cumulative SpO2 <90% time over 48 h (median 70.8 vs 103.5 minutes; geometric means ratio 0.86; 95% CI, 0.78-0.95; P=0.002).
- Durations of hypotension and tachycardia were not significantly different between groups.
- Interventions were similar; about half of patients in each group received new oxygen therapy.
Methodological Strengths
- Multiple crossover cluster randomized design with ward-level allocation and prespecified alert thresholds
- ClinicalTrials.gov registration and objective, continuously captured physiological endpoints
Limitations
- Single-center, two-ward setting may limit generalizability
- Unblinded monitoring arm could influence clinician behavior; not powered for hard clinical outcomes
Future Directions: Conduct multicenter trials powered for complications and mortality, assess cost-effectiveness and alarm management, and integrate with early warning systems.
IMPORTANCE: Continuous postoperative monitoring on general nursing units detects vital sign abnormalities that are missed with conventional intermittent monitoring. Early recognition may prompt interventions to limit potentially harmful blood pressure, heart rate, and oxygen saturation perturbations. OBJECTIVE: To test the hypothesis that continuous unblinded monitoring of vital signs would decrease blood pressure, heart rate, and oxygen saturation abnormalities compared with intermittent monitoring in patients recovering from noncardiac surgery. DESIGN, SETTING, AND PARTICIPANTS: This multiple crossover randomized cluster trial in 2 postoperative hospital wards included patients recovering from noncardiac surgery and was conducted from October 7, 2020, to October 7, 2021.
2. Comparison of the Effects of Glycopyrrolate and Atropine on Postoperative Delirium in Older Adult Patients Undergoing Laparoscopic Colorectal Surgery: A Randomized Controlled Trial.
Among 121 older adults, glycopyrrolate combined with neostigmine reduced POD compared with atropine (11.7% vs 27.9%; RR 0.42; 95% CI 0.19-0.94; p=0.045) and better maintained baseline heart rate and mean arterial pressure. Neuronal injury biomarkers (NfL, NSE, Tau) did not differ between groups.
Impact: Provides randomized evidence to inform anticholinergic choice during reversal in older adults, linking glycopyrrolate with lower delirium risk.
Clinical Implications: For older adults undergoing laparoscopic colorectal surgery, pairing neostigmine with glycopyrrolate rather than atropine may reduce POD while maintaining hemodynamic stability. Validation across procedures and centers is warranted.
Key Findings
- Incidence of POD: 11.7% (glycopyrrolate) vs 27.9% (atropine); relative risk 0.42 (95% CI 0.19–0.94; p=0.045).
- Glycopyrrolate better preserved baseline heart rate and mean arterial pressure intraoperatively.
- No significant differences in plasma NfL, NSE, Tau between groups over time.
Methodological Strengths
- Prospective, double-blind, randomized controlled design
- Standardized surgical population with concurrent biomarker assessment
Limitations
- Single-center study with modest sample size limits generalizability
- Focused on laparoscopic colorectal surgery; external validity to other procedures unknown
Future Directions: Multicenter trials across surgical types and anesthetic strategies, mechanistic studies on central anticholinergic effects, and cognitive outcomes beyond hospitalization.
BACKGROUND: Postoperative delirium (POD) is a common complication that hinders recovery in older patients. This study aimed to compare the effects of glycopyrrolate and atropine, used to counteract the peripheral effects of neostigmine, on POD incidence in older patients undergoing laparoscopic colorectal surgery. METHODS: This single-centre, double-blind, randomized controlled trial recruited patients (aged 65-80 years) undergoing laparoscopic colorectal surgery. Patients were randomized to receive either glycopyrrolate (0.04 mg kg
3. Comparison of caudal and retrolaminar blocks for postoperative analgesia in pediatric orchidopexy: a randomized controlled trial.
In 62 children, RLB yielded lower FLACC pain scores at 6, 12, and 24 hours, prolonged time to first rescue analgesia, and reduced 24-hour analgesic consumption versus caudal block. Fewer children required rescue analgesia in the RLB group (3/31) than CB (14/31). No major block-related complications occurred.
Impact: Demonstrates superior and more durable analgesia of ultrasound-guided RLB over the traditional caudal approach in pediatric orchidopexy, supporting opioid-sparing ERAS pathways.
Clinical Implications: Consider RLB as a first-line regional technique for unilateral orchidopexy to improve 24-hour pain control and minimize rescue analgesia. Training and ultrasound proficiency are prerequisites.
Key Findings
- RLB produced lower FLACC scores at 6 h (P=0.002), 12 h (P=0.007), and 24 h (P=0.018) compared with caudal block.
- Time to first analgesic was longer and total 24-hour analgesic consumption lower with RLB (P<0.001 and P=0.001, respectively).
- Rescue analgesia was required in 3/31 (RLB) vs 14/31 (caudal); no major block-related complications.
Methodological Strengths
- Double-blind randomized controlled design across two tertiary centers
- Standardized anesthetic regimen with predefined rescue criteria and serial FLACC assessments
Limitations
- Modest sample size limits precision and subgroup analyses
- Follow-up limited to 24 hours; generalizability beyond unilateral orchidopexy is uncertain
Future Directions: Larger multicenter trials comparing RLB with other truncal blocks, motor block and ambulation assessments, and longer-term outcomes including parental satisfaction and ERAS metrics.
BACKGROUND: Lower abdominal surgeries in children are associated with significant postoperative pain. While caudal block (CB) is widely used, ultrasound-guided truncal blocks such as retrolaminar block (RLB) may provide more targeted and prolonged analgesia. METHODS: In this double-blind, randomized controlled trial conducted at two tertiary hospitals (March 1-September 1, 2025), children aged 1-7 years (ASA I-II) scheduled for unilateral orchidopexy were randomized to RLB or CB. CB received 0.125% bupivacaine 1 mL/kg (max 20 mL); RLB received 0.25% bupivacaine 0.1 mL/kg, both under standardized general anesthesia with intraoperative IV paracetamol (10 mg/kg).