Publications by authors named "Tae-Soo Hahm"

Objective: To investigate the hepatic effects of high-dose intravenous (IV) iron, including those on liver function and the degree of fibrosis, in a rat model of cirrhosis.

Methods: We evenly allocated 25 Sprague-Dawley rats into five groups: normal rats (control group), cirrhotic rats receiving IV normal saline (liver cirrhosis [LC] group), and cirrhotic rats receiving 20, 40, or 80 mg/kg IV ferric carboxymaltose (LC-iron20, LC-iron40, and LC-iron80 group, respectively). Biochemical parameters were compared at 0, 7, 14, 21, and 28 days.

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Article Synopsis
  • The study compared the effectiveness of two pain relief methods—programmed intermittent epidural boluses (PIEB) and continuous epidural infusion (CEI)—for women recovering from elective cesarean sections.
  • 74 women were randomly assigned to either PIEB, receiving hourly doses of ropivacaine, or CEI, which provided a continuous rate of the same medication.
  • Results showed that the PIEB group had significantly lower pain scores both at rest and during movement, along with fewer instances of motor blockage, indicating that PIEB is a more effective and safer option for postpartum pain management.
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Background: The enhanced recovery after surgery (ERAS) protocols have been consistently associated with improved patient experience and surgical outcomes. Despite the release of ERAS Society guidelines specific to gynecologic oncology, the adoption of ERAS in gynecology on global level has been disappointingly low and some centers have shown minimal improvement in clinical outcomes after adopting ERAS. The aim of this study is to describe the development and early experience of ERAS protocols in gynecologic surgery at an urban academic tertiary medical center.

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Study Objective: To investigate the analgesic efficacy of erector spinae plane block (ESPB) in major gynecologic surgery, expressed as cumulative opioid consumption 24 h after surgery.

Design: A single-center, patient-assessor blinded, randomized controlled study.

Setting: Samsung medical center (tertiary university hospital), between February 2022 to January 2023.

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Background: Surgery for gynecologic malignancy via midline-laparotomy leads to severe postoperative pain. Adequate pain control while sparing opioid consumption does offer benefits in postoperative complications and recovery. Intrathecal morphine (ITM) provides simple and effective analgesia.

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Background: There is a lack of convincing data concerning the safety of iron therapy in patients with advanced liver cirrhosis (LC). This study investigated the hepatic effects of ferric carboxymaltose, an intravenous iron supplement, in a rat model of cirrhosis.

Methods: In total, 45 Sprague-Dawley rats were allocated into three groups: normal rats (control group, n=15), cirrhotic rats receiving intravenous normal saline (LC group, n=15), and cirrhotic rats receiving 20 mg/kg intravenous ferric carboxymaltose (LC-iron group, n=15).

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Patients with chronic renal failure (CRF) are likely to have obstructive sleep apnea (OSA) underdiagnosed, and maintaining airway patency is important during sedation. This study compared Jaw elevation device (JED) with conventional airway interventions (head lateral rotation, neck extension, oral or nasal airway insertion, and jaw thrust maneuver) during sedation and hypothesized that JED may be effective to open the airway. A total of 73 patients were allocated to a conventional group ( = 39) and a JED group ( = 34).

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Background: Ultrasound is not widely used to evaluate optimal supraglottic airway positioning even though it could potentially be used to identify and correct problem areas.

Aims: We evaluated a new ultrasound scoring method to identify the position of the supraglottic airway and detect the location of air leaks during ventilation in pediatric patients.

Methods: Using a prospective observational study design, we enrolled 90 pediatric patients of ASA physical status I-III scheduled for elective surgery under general anesthesia.

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Background: Propofol is widely used in general anesthesia, and it has been reported to protect various organs against ischemia-reperfusion injury (IRI), including liver. To evaluate the hepatoprotective effects of ischemic preconditioning (IP) under propofol anesthesia, we investigated the possible underlying mechanisms in rats.

Methods: Male Sprague-Dawley rats were randomly assigned to 3 groups: sham group (n = 5), non-IP group (n = 9; 45 minutes of hepatic ischemia followed by 2 hours of reperfusion), and IP group (n = 9; IP applied as 10 minutes of hepatic ischemia followed by 15 minutes of reperfusion before 45 minutes of ischemia).

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Objective: To compare the efficacy of a pulmonary recruitment maneuver using lower airway pressure (30 cm HO) and intraperitoneal bupivacaine, alone or in combination, for reducing shoulder pain after gynecologic laparoscopy.

Methods: A prospective controlled study was performed in a teaching hospital with patients who underwent elective gynecologic laparoscopic surgery. Two hundred eighty-seven patients were randomized into 1 of 4 groups: group A, placebo; group B, intraperitoneal instillation of bupivacaine; group C, CO removal by a pulmonary recruitment maneuver; group D, combination of intraperitoneal bupivacaine and pulmonary recruitment maneuver.

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The optimal head position for GlideScope facilitated nasotracheal intubation has not yet been determined. We compared the neutral and sniffing positions to establish the degree of intubation difficulty. A total of 88 ASA I-II patients requiring nasotracheal intubation for elective dental surgery with normal airways were divided into two groups according to head position, neutral position (group N), and sniffing position (group S).

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Intravenous (IV) dexmedetomidine is reported to prolong analgesia following peripheral nerve blocks. Popliteal sciatic nerve block provides effective postoperative analgesia, but some patients still experience severe pain during the early postoperative period. We aimed to evaluate the postoperative analgesic effects of IV dexmedetomidine versus propofol in patients undergoing foot surgeries under popliteal sciatic nerve block.

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Systemic oxygen delivery (DO) is a more comprehensive marker of patient status than arterial oxygen saturation (SaO), and DO in the range of 330-500 mL min is reportedly adequate during anaesthesia. We measured DO during one-lung ventilation (OLV) for thoracic surgery-where the risk of pulmonary shunt is significant, and hypoxia occurs frequently-and compared sevoflurane and propofol, the two most commonly used anaesthetics in terms of DO. Sevoflurane impairs hypoxic pulmonary vasoconstriction.

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Background: Interscalene brachial plexus block of the C5-C6 roots provides highly effective postoperative analgesia after shoulder surgery but usually results in hemidiaphragmatic paresis. Injection around the superior trunk of the brachial plexus is an alternative technique that may reduce this risk. The authors hypothesized that the superior trunk block would provide noninferior postoperative analgesia compared with the interscalene block and reduce hemidiaphragmatic paresis.

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Dexmedetomidine is widely used for conscious sedation in patients undergoing lower-extremity surgery under regional anesthesia. We evaluated the postoperative analgesic effects of intravenous dexmedetomidine given during ankle surgery under spinal anesthesia. Forty-three participants underwent repair of lateral angle ligaments under spinal anesthesia.

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During emergence from general anesthesia, coughing caused by the endotracheal tube frequently occurs and is associated with various adverse complications. In patients undergoing endovascular neurointervention, achieving smooth emergence from general anesthesia without coughing is emphasized since coughing is associated with intracranial hypertension. Therefore, the up-and-down method was introduced to determine the effective effect-site concentration (Ce) of remifentanil to prevent coughing in 50% and 95% (EC50 and EC95) of patients during emergence from sevoflurane anesthesia for endovascular neurointervention.

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Background: Mucopolysaccharidosis type II patients are reported to have an elevated incidence of difficult airway. Propofol is a commonly used sedative for magnetic resonance imaging in pediatric patients, but patients who receive it may exhibit dose-dependent upper airway obstruction and respiratory depression. Dexmedetomidine also provides adequate procedural sedation with a relatively low risk of airway obstruction.

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Background: It is often difficult for the pediatric patient to cooperate or to remain immobile during MR scans. Therefore, sedation is usually needed for children.

Purpose: To evaluate the incidence and contributing factors of unanticipated intubation during sedation for MRI scan in children.

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Background: Interleukin 2 (IL-2) influences the development and severity of pain due to its antinociceptive and immunomodulatory effects. Its production is influenced by the increased expression of c-Cbl (Casitas B-lineage lymphoma proto-oncogene) and Cbl-b E3 ubiquitin ligases. We evaluated the effects on IL-2-mediated changes in c-Cbl and Cbl-b expression in a rat model of chronic neuropathic pain.

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Background And Objectives: Intravenous (IV) dexmedetomidine (DEX) is reported to prolong the analgesic duration after single-shot interscalene brachial plexus block (ISBPB). However, the effective analgesic dose of IV DEX remains undetermined. Therefore, we aimed to elucidate the clinically relevant dose of IV DEX to prolong the analgesic duration of ISBPB.

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Since the implementation of the model for end-stage liver disease (MELD) scoring system in 2002, the liver transplantation (LT) society has observed a substantial increase in the number of recipients with renal dysfunction. Intraoperative renal replacement therapy (ioRRT) has emerged as one of the solutions available to manage high-MELD score recipients; however, its usefulness has not yet been proven. To date, we have experienced five cases of simultaneous liver and kidney transplantation (SLKT).

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The influence of body-mass index (BMI) on spinal anesthesia is still controversial, with discrepant results reported in previous studies. To compare spinal anesthesia in obese and non-obese subjects, the anesthesia profiles in patients who underwent spinal anesthesia using intrathecal hyperbaric bupivacaine were compared. A total of 209 patients undergoing elective total knee replacement arthroplasty (TKRA) surgery under spinal anesthesia were divided into an NO (non-obese) group (BMI < 30 kg/m2, n = 141) and an O (obese) group (BMI ≥ 30 kg/m2, n = 68).

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Purpose: We performed a multicenter, randomized, double-blind trial to assess the efficacy and safety of a single, fixed, intravenous dose of palonosetron (0.075 mg) in the treatment of established postoperative nausea and vomiting (PONV).

Methods: Three hundred and eighty-four patients who had at least one risk factors of PONV and underwent surgery under general anesthesia were screened.

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Study Objective: To compare cosmetic satisfaction with laparoendoscopic single-site surgery (LESS) compared with multi-port surgery.

Design: Randomized controlled trial (Canadian Task Force classification I).

Setting: University hospital.

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