Publications by authors named "Shinsuke Hamaguchi"

Rationale: Primary hyperparathyroidism (PHPT), which is characterized by increased parathyroid hormone secretion, typically manifests as hypercalcemia and hypertension. Here, we report a case of severe hypotension following tracheal intubation during anesthesia induction in a patient with PHPT, in contrast to the expected hypertensive response.

Patient Concerns: A 52-year-old man presented with nausea after eating, leg pain when walking, and headaches.

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Background: Diagnosis of perioperative anaphylaxis is difficult because of its non-specific and variable signs and symptoms. Therapeutic agents used to treat anaphylaxis and anaesthesiologist responses also vary depending on the case, which might affect outcomes; however, only a few studies have focused on these factors.

Methods: This prospective study of perioperative anaphylaxis, a part of the Japanese Epidemiologic Study for Perioperative Anaphylaxis, investigated the clinical signs, its severity, therapeutic drugs, epinephrine administration, and anaesthesiologist responses in cases of perioperative anaphylaxis to assess trends and variability.

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To evaluate the utility of 6% hydroxyethyl starch (HES) 130/0.4 in oral cancer surgeries with durations over 6 hours. Using a case-control study design, the investigators enrolled patients who underwent oral cancer surgery involving osteotomy or manipulation near the major blood vessels at the Department of Orofacial Surgery in our hospital between 2017 and 2020.

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Background: Facial onset sensory and motor neuropathy is a very rare sensorimotor disorder characterized by facial onset and gradual progression, with approximately 100 cases reported worldwide in 2020. We report on our experience with a facial onset sensory and motor neuropathy case in our outpatient pain clinic.

Case Presentation: A 71-year-old Japanese man with a previous diagnosis of trigeminal nerve palsy complained of facial paresthesia, cervical pain, and arm numbness.

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The A11 region plays a role in numerous physiological functions, including pain and locomotor activity, and consists of a variety of neurons including GABAergic, calbindin positive (Calb), and dopaminergic (DA) neurons. However, the neurochemical nature of Calb neurons and their regulatory role in the A11 region remain largely unknown. In this study, we examined the kind of functional markers co-expressed in the Calb neurons using sections from 8-week-old rats.

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A 20-year-old woman with glycogen storage disease type 0 (GSD-0) underwent velopharyngeal closure for velopharyngeal insufficiency following palatoplasty. To reduce the risk of complications attributed to GSD-0, general anesthesia was administered using a total intravenous anesthesia (TIVA) technique with propofol and remifentanil, along with supplemental glucose-containing intravenous fluids. Her blood glucose remained stable, intraoperative body temperature ranged from 36.

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Introduction: Methadone is known to prolong the QT interval, which could induce lethal arrhythmias such as torsades de pointes. To determine the risk of ventricular arrhythmias in cancer patients using methadone, we measured QT dispersion (QTD) and Tpeak-Tend (TpTe) before and after methadone administration and evaluated the correlations between methadone dosage and cardiac repolarization.

Methods: We conducted a retrospective observational study with 19 patients undergoing follow-up for cancer pain with methadone.

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Introduction: Transcatheter aortic valve implantation (TAVI) has been established as an alternative to surgical aortic valve replacement (SAVR) for high-risk patients. To assess the impact of TAVI on cardiac repolarization, we compared QT dispersion (QTD) and the interval from the peak to the end of the T wave (Tpeak-Tend: TpTe) between the patients who underwent TAVI and those who underwent SAVR and TpTe between the patients who underwent TAVI or SAVR.

Methods: This retrospective study was approved by the ethics committee of Dokkyo Medical University Hospital.

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Although there is no remarkable change of anesthetics or anesthesia methods in recent years, several new technologies are used for safety management of cardiac, lung or thoracic surgery. Stroke volume variation (SVV) monitoring indicates SVV, a parameter to optimize fluid infusion and is used to avoid edema or congestive heart damage due to over hydration. SmartPilot View, a pharmacokinetic simulator during anesthesia, represents the measured effective site concentration of anesthetics and contributes the optimization of induction and maintenance of anesthesia.

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The A11 dopaminergic cell group is the only group among the A8-A16 dopaminergic cell groups that includes neurons innervating the spinal cord, and a decrease in dopaminergic transmission at the spinal cord is thought to contribute to the pathogenesis of restless legs syndrome. However, the mechanisms regulating the neuronal activity of A11 dopaminergic neurons remain to be elucidated. Unraveling the neuronal composition, distribution and connectivity of A11 neurons would provide insights into the mechanisms regulating the spinal dopaminergic system.

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Intraoperative complications regarding spinal cord stimulation (SCS) are dural or arachnoidal puncture, spinal or radicular injury and bleeding. Most common complications after SCS are malposition of epidural lead and unexpected device trouble. Other severe complica- tions are infection, hematoma and post dural puncture headache.

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Thermography is an imaging method using the instrument to detect infrared rays emitted from the body surface, and to plot them as a distribution diagram of the temperature information. Therefore, a thermographic instrument can be assumed to measure the skin temperature of the diseased region. Such an instrument is a useful device for noninvasive and objective assessment of various diseases.

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Buprenorphine is a chemically synthesized opioid characterized as the partial mu agonist and kappa antagonist, and transdermal buprenorphine patch will be considered useful as a strong analgesic with fewer psychological side effects in the treatment of chronic non-cancer pain. Use of transdermal buprenorphine should be limited for pain relief of intractable muscle skeletal pain that cannot be alleviated with other analgesics. To avoid severe complication and drug abuse or addiction, assessment of pain and medical history including drug dependence by medical team are important before administration of transdermal buprenorphine.

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Background: The authors examined in vivo the effects of general anesthetics on evoked substance P release (primary afferent excitability) and c-Fos expression (neuronal activation) in superficial dorsal horn.

Methods: Rats received saline, propofol (100 mg/kg), pentobarbital (50 mg/kg), isoflurane (2 minimum alveolar concentration), nitrous oxide (66%), or fentanyl (30 μg/kg). During anesthesia, rats received intraplantar 5% formalin (50 μl) to left hind paw.

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Background And Objectives: The aim of this study was to compare the potency of bupivacaine, ropivacaine, and levobupivacaine in an equal dose and concentration for sympathetic block.

Methods: We measured mean arterial pressure, heart rate (HR), and right and left brachial artery blood flow (BABF) before and after cervicothoracic sympathetic block in 24 dogs. The experimental protocol was designed as follows: (1) left cervicothoracic sympathetic block with 1.

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Background: Electroconvulsive therapy (ECT) used in the treatment of severe psychiatric disorders induces stimulation of the autonomic nervous system with initial parasympathetic outflow immediately followed by a sympathetic response. These responses induce an initial bradycardia, arrhythmias, and hypertension. QT dispersion (QTD), defined as maximal QT interval minus minimal QT interval on 12 leads of the surface electrocardiogram, reflects regional heterogeneity of ventricular repolarization.

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Study Objective: To examine the effects of landiolol on the QT interval, rate-corrected QT (QTc) interval, QT dispersion (QTD), and rate-corrected QTD (QTcD) during tracheal intubation using computerized measurement.

Design: Randomized, double-blinded study.

Setting: Dokkyo Medical University Hospital operating room.

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A 68-year-old man was scheduled for pancreaticoduodenectomy under general anesthesia. He was suffering from Charcot-Marie-Tooth disease (CMTD) for 34 years, and complicated with liver cirrhosis. Anesthesia was induced with propofol and fentanyl, and maintained with oxygen-air-sevoflurane and remifentanil.

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Recently, a customized oxygen tube is available. The circumference of a newly designed oxygen tube is larger than the original tube. In addition, new features are attached at the four sides of the connecter.

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A 20-year-old woman with corrected transposition of great arteries (height 163 cm, weight 69 kg) was scheduled for elective cesarean section at 36 weeks of gestation. Since her mitral insufficiency had deteriorated during pregnancy, she developed dyspnea and lower cardiac function. We decided to perform general anesthesia for her cesarean section.

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Background And Objectives: The aim of this study was to examine the duration of vasodilation induced by sympathetic block with the addition of dexmedetomidine to mepivacaine.

Methods: We measured right and left brachial artery blood flow (BABF) before and after stellate ganglion block used as a sympathetic block in dogs. The experimental protocol was designed as follows: (1) left stellate ganglion block using 1.

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