Publications by authors named "Kentaro Kuwamoto"

Article Synopsis
  • The study examined how transarterial embolization (TAE) affects 30-day survival rates in patients with isolated pelvic fractures, emphasizing age and shock status.
  • Researchers analyzed data from the Japan Trauma Data Bank (2004-2018), focusing on patients categorized into shock and nonshock groups based on their shock index.
  • Results revealed that TAE significantly improved survival in shocked patients (83.0% vs. 76.2%), with the greatest benefit seen in individuals aged 80 and older (78.5% vs. 66.6%).
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Objective: Rebleeding of aneurysmal subarachnoid hemorrhage (aSAH) is one of the significant risk factors for poor clinical outcome. The rebleeding risk is the highest during the acute phase with an approximate rebleeding rate of 9-17% within the first 24 h. Theoretically, general anesthesia can stabilize a patient's vital signs; however, its effectiveness as initial management for preventing post-aSAH rebleeding remains unclear.

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Here, we have reported a case pertaining to a 59-year-old man with bilateral traumatic carotid artery injury caused by vinyl umbrella penetration who was successfully treated. The patient fell from the stairs while holding an umbrella, which penetrated his neck. On admission, the patient was in a comatose state and the umbrella had been removed.

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Arteriovenous fistulas at the craniocervical junction are rare vascular malformations with frequent hemorrhagic presentations, which may have a concurrent pial feeder aneurysm. A 65-year-old man presented with subarachnoid hemorrhage and angiography showed an epidural arteriovenous fistula at the C-2 level with an anterior spinal feeder aneurysm without perimedullary venous drainage. Transarterial coil embolization of the ruptured aneurysm and partial Onyx embolization of the shunt led to thrombosis of the aneurysm.

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A 28-year-old pregnant woman underwent an emergency caesarian section after 39 weeks of gestation because of decreased fetal movement and baseline fetal heart rate variability. The neonate was diagnosed with neonatal asphyxia and presented with right cardiac failure due to pulmonary hypertension. The neonate presented convulsion, and plane computed tomography (CT) showed dilation of the vein of Galen and sinuses on day 3.

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Article Synopsis
  • The study examined outcomes for patients with poor-grade aneurysmal subarachnoid hemorrhage (aSAH) treated aggressively within 6 hours of arriving at the hospital.
  • About 39.4% of patients achieved good functional outcomes at 6 months, with a notable difference between those without intraventricular hemorrhage or brain herniation showing a 48.9% good outcome rate.
  • The findings suggest that ultra-early surgical intervention might improve recovery chances for patients with poor-grade aSAH, warranting further research to validate these results.
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Background: Coagulopathy and old age have been associated with poor outcomes in traumatic brain injury (TBI) patients; however, the relationships of coagulopathy and age with the acute phase of TBI remain unclear. We hypothesized that coagulation/fibrinolytic abnormalities are more severe in older patients in the acute phase of TBI and may explain, in part, their poor outcome.

Methods: We analyzed the relationship between coagulation/fibrinolytic parameters and age in the acute phase of TBI by retrospectively evaluating 274 patients with initial blood samples obtained no more than 1 hour after injury.

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Objective: We report the availability of a newly developed, malleable, tin-alloyed omnidirectional retractor-supporting (OD) ring for steady and safe ventriculoperitoneal (VP) shunt laparotomy.

Methods: The OD ring is principally circular in shape, 15 cm in diameter, and is sufficiently malleable to be fitted to the abdominal wall. There are 22 outward protrusions 12 mm in length that are welded to the outside of the ring at regular intervals.

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Objective: With the increase in the aged population, geriatric traumatic brain injury (gTBI) is also rapidly increasing in Japan. There is thus a need to review the effect of intensive treatments for gTBIs. The aim of this study was 1) to assess how intensive treatments influenced patient outcome and 2) to identify the refractory factor against these intensive treatments in gTBI, from the Japan Neurotrauma Data Bank (JNTDB).

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Traumatic brain injury (TBI) has long been associated with coagulopathy; however, the time course of coagulation/fibrinolytic parameters in the acute phase of TBI remains unclear. The purpose of the study was to analyze the time course of coagulation/fibrinolytic parameters in the acute phase of TBI and to elucidate parameter relationships to prognosis. We retrospectively evaluated 234 patients with severe isolated TBI with initial blood samples obtained no more than 1 h after injury.

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Background: The increase of serum brain natriuretic peptide (sBNP) is well known in patients with severe subarachnoid hemorrhage (SAH). However, the pathophysiology between the clinical severity of SAH and the sBNP secretion is still not clear. The aim of this study is thus to clarify the cardiovascular pathophysiological mechanisms of sBNP secretion in severe SAH patients.

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Article Synopsis
  • Prophylactic triple-H therapy is commonly used to prevent delayed cerebral ischemia (DCI) after subarachnoid hemorrhage (SAH), but its effectiveness on hemodynamic variables is unclear.
  • A study conducted on 178 aneurysmal SAH patients across 9 hospitals in Japan found no significant difference in DCI rates between those who received triple-H therapy and those who did not.
  • Although the triple-H group showed higher fluid intake and arterial pressure, there were no notable differences in global end-diastolic volume index (GEDI) or cardiac output, indicating a need for further research on DCI prevention strategies.
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Objectives: Limited evidence supports the use of hemodynamic variables that correlate with delayed cerebral ischemia or pulmonary edema after aneurysmal subarachnoid hemorrhage. The aim of this study was to identify those hemodynamic variables that are associated with delayed cerebral ischemia and pulmonary edema after subarachnoid hemorrhage.

Design: A multicenter prospective cohort study.

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