Publications by authors named "Akihiro Yasui"

Background: Choledochal cyst is treated with extrahepatic bile duct resection and hepaticojejunostomy. Minimally invasive approaches, including laparoscopic surgery (LS) and robotic surgery (RS), offer potential advantages over open surgery (OS), but their impact on perioperative and short-term postoperative outcomes remains unclear.

Methods: This retrospective study analyzed 201 pediatric patients who underwent OS (n=83), LS (n=89), or RS (n=29).

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Esophageal atresia (EA) is frequently associated with tracheomalacia (TM). Recently, the use of posterior tracheopexy (PT) during EA repair for addressing TM has gained attention. Herein, we report a case of thoracoscopic PT in a 6-year-old boy with EA.

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Background: Late postoperative complications of congenital biliary dilatation include intrahepatic bile duct stones, cholangitis, and cholangiocarcinoma. This study aimed to establish a preoperative classification system using intrahepatic bile duct morphology and evaluate its effectiveness in predicting postoperative complications.

Methods: This retrospective study reviewed 196 patients who underwent radical congenital biliary dilatation surgery between 2003 and 2022.

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Bile duct perforation is a rare, serious complication of congenital biliary dilatation (CBD). While traditionally managed with a two-stage surgical approach, recent reports suggest that one-stage, minimally invasive approaches may be feasible. We present the case of a 13-month-old female who developed bile duct perforation associated with a protein plug in the common channel.

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Background: Laparoscopic gastrostomy has improved surgical and cosmetic outcomes. Our approach involves a strategy of reduced port surgery, wherein only the umbilicus and tube insertion site were incised, with an additional port inserted if manipulation is difficult. This study aimed to investigate the outcomes of our reduced port gastrostomy strategy.

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Background: Robot-assisted surgery (RS) has gained popularity due to its potential advantages over conventional laparoscopic surgery (LS). However, the specific suturing steps that benefit most from RS in terms of efficiency remain unclear. This study aimed to compare the suturing performance and learning curves of RS and LS during hepaticojejunostomy.

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Background: Young pediatric surgeons should receive adequate training in various minimally invasive surgeries (MIS). However, it is essential to maintain patient safety and outcomes during the learning process. In Japan, the endoscopic surgical skill qualification (ESSQ) system in pediatric surgery was initiated by the Japan Society for Endoscopic Surgery (JSES) in 2009 to objectively evaluate the skill of endoscopic surgeons.

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Purpose: To analyze the frequency and predictive factors of the development of postoperative pectus excavatum and scoliosis in children who underwent surgery for cystic lung disease.

Methods: This study examined patients who underwent surgery for cystic lung disease (open and thoracoscopic) between July 2000 and December 2018 with a > 3-year follow-up period. Lesion size, surgical outcomes, and subsequent musculoskeletal complications were compared between the open surgery and thoracoscopic surgery groups.

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Purpose: Tracheomalacia (TM) is commonly associated with esophageal atresia (EA) and compression by the brachiocephalic artery is a factor for TM. Previous research has focused on the lateral-to-anteroposterior tracheal diameter ratio (LAR). This study aimed to assess the LAR and postoperative outcomes of EA patients.

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Background/purpose: We evaluated the minimally invasive surgery for congenital biliary dilatation (CBD) in adults and children and analyzed the surgical outcomes, especially in children aged <6 years.

Methods: Characteristics and surgical outcomes of patients with CBD who underwent minimally invasive surgery at our hospital between 2013 and 2023 were retrospectively reviewed.

Results: Overall, 129 patients (89 children aged <6 years, 9 children aged between 6 and 18 years, and 21 adults) were included in this study.

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Article Synopsis
  • The Senhance robotic system is a new surgical robot that shows promise as a safe and effective alternative to the da Vinci system, especially for pediatric surgeries.
  • A case series involving three children underwent anorectoplasties and rectal surgery using this robotic system, with no complications reported during or after the procedures.
  • The advantages of Senhance include high-quality 3D imaging, reduced tremor in tool movements, and the use of smaller 3-mm instruments, making it particularly suitable for delicate surgeries in children.
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  • Biliary atresia (BA) leads to ongoing liver inflammation and fibrosis even after jaundice is cleared, prompting a study on the benefits of eicosapentaenoic acid (EPA) for post-treatment recovery.
  • The study involved BA patients who received EPA after a surgical procedure, comparing their outcomes with those who did not receive EPA over two years.
  • Results indicated that while EPA did not enhance jaundice clearance, it significantly reduced liver fibrosis progression in patients who were jaundice-free two years post-surgery.
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  • The study investigates patients with biliary atresia (BA) to understand if abnormal portal vein (PV) development leads to severe portal hypertension (HTN) independent of bile obstruction.* -
  • A cohort of 47 newborns with cholestasis was examined, revealing that those with BA had smaller PV diameters and larger hepatic artery (HA) diameters compared to other cholestasis cases, but these measurements did not correlate with liver fibrosis.* -
  • The results show that 83% of BA patients cleared jaundice, while 66% survived with their native liver by age two; however, 20% experienced serious complications like intestinal bleeding or ascites.*
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Background: Pediatric minimally invasive surgery requires advanced technical skills. Off-the-job training (OJT), especially when using disease-specific models, is an effective method of acquiring surgical skills. To achieve effective OJT, it is necessary to provide objective and appropriate skill assessment feedback to trainees.

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  • * Out of 97 patients, 29 were excluded, leaving 48 living with their native liver and 20 who received transplants after one year, with bile lake identified as the strongest risk factor for liver transplant.
  • * The findings suggest that bile lake can lead to serious complications, highlighting its significance as a risk factor for those with biliary atresia who maintain their native liver for a year post-surgery.
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  • The study assesses the effectiveness of thoracoscopic primary repair for esophageal atresia with tracheoesophageal fistula in newborns, specifically focusing on patients weighing less than 2000 g and those undergoing emergency surgery on their birth day.
  • A total of 43 patients were analyzed, revealing that surgical outcomes were similar regardless of weight, but those who had surgery at birth had a higher incidence of anastomotic leakage compared to those operated on after one day.
  • The findings suggest that while thoracoscopic primary repair is generally safe for low-weight newborns, caution is advised for those needing emergency surgery at 0 days due to the increased risk of complications.
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  • Duodenal duplication cysts (DDC) are rare digestive tract duplications requiring careful treatment based on size and location, with total resection being ideal but often challenging due to potential damage to nearby structures.
  • A case involving a 6-year-old boy with DDC and a congenital anomaly allowed for successful laparoscopic resection and reconstructive surgery, avoiding injury to critical ducts.
  • The postoperative outcome was positive, with the patient discharged after 12 days, demonstrating that appropriate surgical techniques can lead to favorable results in managing DDC even in pediatric cases.
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  • Sandifer syndrome (SS) is a rare condition characterized by a combination of gastroesophageal reflux (GER) and neurological or psychiatric issues, often leading to delayed diagnosis.
  • A systematic review of existing literature, along with two new cases, revealed that most patients show symptom improvement with treatment for GER; however, those with anatomical anomalies often required surgical intervention.
  • The study suggests that healthcare providers should consider SS in patients with unusual posturing and that surgical options may be beneficial, particularly for those with anatomical issues or unresolved symptoms after a month of non-surgical treatment.
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  • A retrospective evaluation of laparoscopic fundoplication (LF) outcomes in patients with ventriculoperitoneal (VP) shunts revealed no significant differences in outcomes when compared to patients without shunts.
  • The study analyzed data from 10 patients with VP shunts and 96 without, finding no shunt complications post-procedure and a low overall complication rate of 3.6% in the larger group of 605 patients.
  • The findings suggest that LF can be safely performed on children with VP shunts, with similar operative times, hospital stays, and complication rates as those without shunts.
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  • This study focused on creating a treatment plan for infants with congenital biliary dilatation diagnosed before birth, analyzing patient data from surgeries performed between 2013 and 2023.
  • It compared two groups of infants: those needing immediate surgery ("early group") and those who could wait ("scheduled group") while assessing various health indicators like blood test results and cyst size.
  • The findings revealed that infants with cysts larger than 30 mm at birth are at a higher risk of needing surgery early, suggesting the importance of close monitoring and guidance for their families.
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Background: Preoperative management of Hirschsprung's disease (HD) is currently being conducted with the goal of performing single-stage radical surgery without ileostomy.

Methods: We retrospectively reviewed HD cases between 2013 and 2022, as well as their outcomes related to preoperative management.

Results: Thirty-nine patients with HD were included in this study, including short-segment HD (30 cases), long-segment HD (4 cases), and total colonic aganglionosis (5 cases).

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Article Synopsis
  • Esophageal anastomotic stricture (EAS) occurs in 4-60% of esophageal atresia surgery cases, with balloon dilatation being the first-line treatment, although it may not always work and can lead to complications.
  • In a case involving a neonatal patient who experienced recurrent EAS after receiving treatment, retrograde balloon dilatation through gastrostomy was used but failed to prevent recurrence.
  • The conclusion emphasizes that if EAS recurs after treatment, patients should be assessed for gastroesophageal reflux disease (GERD) and potentially undergo anti-reflux surgery to manage and prevent further complications.
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Article Synopsis
  • * Duodenoduodenostomy is the standard treatment, but some cases need different surgical options like gastrojejunostomy.
  • * The choice of surgery should be tailored to each patient's unique health situation and needs.
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Purpose: This study aimed to evaluate the learning curve of thoracoscopic repair of tracheoesophageal fistula (TEF) by a single surgeon using a cumulative sum (CUSUM) analysis.

Methods: Prospective clinical data of consecutive Gross type-C TEF repairs performed by a pediatric surgeon from 2010 to 2020 were recorded. CUSUM charts for anastomosis and operating times were generated.

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Despite improving the survival after repair of esophageal atresia (EA), the morbidity of EA repair remains high. Specifically, tracheomalacia (TM) is one of the most frequent complications of EA repair. Continuous positive airway pressure is generally applied for the treatment of TM.

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