Bon-Wook Koo

BACKGROUND: The beneficial effects of deep blockade are not fully known. In this study, we evaluated the effect of deep neuromuscular blockade on surgical conditions during laparoscopic cholecystectomy under low-pressure pneumoperitoneum. METHODS: Patients undergoing elective laparoscopic cholecystectomy were randomized to either the moderate group (train-of-four count of 1 or 2) or deep group (posttetanic count of 1 or 2). Neuromuscular blockade was induced and maintained with rocuronium; it wa

Breast cancer surgery is known to cause severe acute postoperative pain, which can persist for a long time. We administered nefopam preventively to patients undergoing lumpectomy with axillary lymph node dissection or sentinel lymph node biopsy, and evaluated its efficacy on acute and chronic postoperative pain.Enrolled patients were assigned to the nefopam (n = 41) or the control (n = 42) group. Before initiating the operation, 20 mg of nefopam was given to the patients of the nefopam group, an

In this study, white rot fungus, Polyporus brumalis, was applied to degrade dibutyl phthalate (DBP), a major environmental pollutant. The degradation potential and resulting products were evaluated with HPLC and GC/MS. As DBP concentration increased to 250, 750, and 1,250 microM, the mycelial growth of P. brumalis was inhibited. However, growth was still observed in the 1,250 microM concentration. DBP was nearly eliminated from culture medium of P. brumalis within 12 days, with 50% of DBP adsorb

There have been few objective evaluations of the effects of deep neuromuscular blockade on intra-operative conditions. In this prospective randomised controlled study, we evaluated the effects of deep neuromuscular block on surgical conditions during laparoscopic colorectal surgery. Patients were randomly allocated using a computer-generated randomisation code to either moderate (train-of-four count 1-2 maintained and antagonised with neostigmine) or deep (post-tetanic count 1-2 maintained and r

Summary Some short procedures require deep neuromuscular blockade, which needs to be reversed at the end of the procedure. Forty‐four patients undergoing elective laryngeal micro‐surgery were randomly allocated into two groups: rocuronium 0.45 mg.kg −1 with neostigmine (50 μg.kg −1 with glycopyrrolate 10 μg.kg −1 ) reversal (moderate block group) vs. rocuronium 0.90 mg.kg −1 with sugammadex (4 mg.kg −1 ) reversal (deep block group). The primary outcome was the intubating conditions during laryng

This study suggests that intraoperative dexmedetomidine sedation, as compared with propofol sedation, may have a greater beneficial effect in reducing agitated behavior in elderly patients undergoing orthopedic surgery with regional anesthesia.

BACKGROUND: Anesthetic agents used for general anesthesia are emerging possible influential factors for surgical site infection (SSI). In this retrospective study, we evaluated the incidence of SSI after colorectal surgery according to the main anesthetic agents: volatile anesthetics vs. propofol. METHODS: A total 1,934 adult patients, who underwent elective colorectal surgery under general anesthesia between January 2011 and December 2013, were surveyed to evaluate the incidence of SSI: 1,519 u

BACKGROUND: The role of intraoperative magnesium for the prevention of emergence agitation or delirium is unclear as there have been conflicting results reported by several randomized controlled trials. AIMS: The aim of this study was to investigate the effect of magnesium sulfate on emergence agitation or emergence delirium in pediatric patients. METHODS: Electronic databases, including PubMed, EMBASE, CENTRAL, CINAHL, Scopus, and Web of Science, were searched to identify studies which evaluate

We examined the use of neostigmine for reversing shallow (defined as train-of-four ratio of 0.5), cisatracurium- and rocuronium-induced neuromuscular block in 112 patients, by use of 0 μg.kg(-1) , 10 μg.kg(-1) , 20 μg.kg(-1) or 40 μg.kg(-1) dose of neostigmine for reversal. The times from neostigmine administration to train-of-four ratios of 0.7, 0.9 and 1.0 were evaluated. Analysis of variance showed that the duration of action was significantly longer after cisatracurium compared with rocuroni

The risk of neuromuscular blockade is certainly minimized by sugammadex in combination with monitoring. However, the effect of sugammadex-aided recovery on patients’ satisfaction is unclear. This study compared the Quality of Recovery (QoR)-15 score, which is a patient-reported outcome, in patients undergoing laparoscopic cholecystectomy. Eighty patients were randomly assigned to the neostigmine or sugammadex groups. At the end of surgery, neostigmine or sugammadex was administered, and tracheal

Maintaining deep neuromuscular block during surgery improves surgical space conditions. However, its effects on patient outcomes have not been well documented. We examined whether maintaining deep neuromuscular blockade during surgery could decrease the stress response compared to moderate neuromuscular blockade. Patients undergoing laparoscopic gastrectomy were randomly allocated to either the moderate (train-of-four counts of 1-2) or deep (post-tetanic counts of 1-2) neuromuscular blockade gro

BACKGROUND: Few studies have evaluated the use of automated artificial intelligence (AI)-based pain recognition in postoperative settings or the correlation with pain intensity. In this study, various machine learning (ML)-based models using facial expressions, the analgesia nociception index (ANI), and vital signs were developed to predict postoperative pain intensity, and their performances for predicting severe postoperative pain were compared. METHODS: In total, 155 facial expressions from p

Background and Objectives: This meta-analysis evaluates the safety and efficacy of remimazolam versus propofol for sedation during colonoscopy, focusing on hemodynamic and respiratory outcomes. Materials and Methods: A comprehensive search of CENTRAL, Embase, PubMed, Scopus, and Web of Science up to January 2025 identified randomized controlled trials (RCTs). Outcomes included hypotension (primary outcome), bradycardia, respiratory depression, injection pain, sedation onset time, emergence time,

BACKGROUND: Intraoperative fluid balance significantly affects patients' outcomes. Goal-directed fluid therapy (GDFT) has reduced the incidence of major postoperative complications by 20% for 30 days after open abdominal surgery. Little is known about GDFT during laparoscopic surgery. AIM: We investigated whether GDFT affects the postoperative outcomes in laparoscopic hepatobiliary or pancreatic surgery compared with conventional fluid management. METHODS: This interventional comparative study w