Publications by authors named "Hiroki Shibayama"

Introduction: Postoperative ulnar neuropathy is still an unresolved complication in patients undergoing plate fixation of distal humerus fractures. We hypothesized that decreased blood flow to the ulnar nerve due to intraoperative procedures is an important factor in the development of postoperative ulnar neuropathy. We herein report three cases of distal humerus fractures in which the soft tissues surrounding the ulnar nerve were preserved as much as possible and finally not transferred anteriorly.

View Article and Find Full Text PDF

Background: Patients with heel pad degloving injury frequently develop ischemic necrosis of the area, necessitating soft-tissue reconstruction surgery. We have developed a technique for arterialization of the plantar venous system via vein graft (APV) as the primary revascularization treatment. The objective of this study was to clarify both the utility of APV for the preservation of degloved heel pads and the impact of this preservation on clinical outcomes.

View Article and Find Full Text PDF
Article Synopsis
  • The patient had a soft, elastic mass on the left index finger, indicating a possible tumor or growth.
  • Microscopic examination revealed a high density of spindle-shaped cells arranged in a storiform (wave-like) pattern.
  • Immunohistochemical tests showed positive results for CD68, factor XIIIa, and α-smooth muscle actin, while being negative for CD34, STAT6, S100 protein, and desmin, helping to narrow down the diagnosis.
View Article and Find Full Text PDF
Article Synopsis
  • Dupuytren's contracture (DC) is a condition marked by fibrosis in the hand, lacking effective treatments, and linked to specific genetic risk factors.
  • Researchers studied the roles of two SNPs related to DC in the SFRP4 protein, which is involved in amplifying inflammation through IL-6 and NF-κB activation.
  • Findings suggest that SFRP4 is connected to the worsening of DC, especially in patients with risk alleles, indicating it could be a potential target for new therapies for this and other inflammatory conditions.
View Article and Find Full Text PDF

Introduction: Malunion of intra-articular fracture of the elbow in children is uncommon and may be difficult to treat. Intra-articular corrective osteotomies are still not commonly performed in children, and the main reason is the concern regarding the risk of osteonecrosis. We present a case of extra-articular corrective osteotomy for malunion after open reduction and internal fixation for fracture dislocation of the elbow.

View Article and Find Full Text PDF

Purpose: Treatment of subacute and chronic static scapholunate instability remains challenging. We aimed to determine 5- to 10-year outcomes of dorsal intercarpal ligament capsulodesis with scapholunate interosseous ligament repair for subacute and chronic static scapholunate instability.

Methods: Six patients with subacute and chronic static scapholunate instability underwent dorsal intercarpal ligament capsulodesis with scapholunate interosseous ligament repair between 2011 and 2015, and 5 of them were followed for at least 5 years after surgery.

View Article and Find Full Text PDF
Article Synopsis
  • * This research involved a comparison between 28 hands with suspected CTS and 10 healthy controls using various ultrasonographic techniques, particularly looking at blood flow signals.
  • * Superb microvascular imaging (SMI) proved to be an effective method, showing stronger correlations with nerve damage indicators compared to power Doppler ultrasound (PDUS) and color Doppler ultrasound (CDUS), suggesting its potential for future studies.
View Article and Find Full Text PDF
Article Synopsis
  • Fibroma of tendon sheath (FTS) is a rare benign tumor commonly found in adults aged 20-40, often misdiagnosed due to atypical symptoms and imaging results.
  • A case study reported a 3-year-old boy diagnosed with a mass in his hand, initially thought to be a ganglion cyst, but imaging revealed characteristics of FTS.
  • After surgical removal, histopathological analysis confirmed the diagnosis of FTS, and the boy showed no signs of recurrence a year later.
View Article and Find Full Text PDF

Wound blotting can be used to visualize the protein distribution on a wound bed through protein collection by attaching a nitrocellulose membrane to the wound surface. This study checked for consistency between the protein distributions determined by wound blotting and those determined by removal of the tissue. A patient who was planning to undergo surgical debridement of an ulcer in the sacral region that was caused by lying down for a long period after a cerebral hemorrhage was recruited in Fujisawa City Hospital, Kanagawa, Japan.

View Article and Find Full Text PDF

The dynamics of a viscoelastic Maxwell fluid is studied in a partially filled cylinder rotating around a horizontal axis. At low rotational velocity, the fluid behaves in the same manner as a viscous fluid. A thin fluid film is pulled up from the edge of a fluid bump at the bottom of the cylinder, and it covers the inner wall of the cylinder completely.

View Article and Find Full Text PDF