[Objective]To examine the safety and efficacy of closing-opening wedege osteotomy for angular kyphosis.Seven patients with angular kyphotic deformity of the thoracic or thoracolumbar spine were treated by closing-opening wedge osteotomy using a single posterior approach.[Method]Seven patients with angular kyphosis were treated.The apex level of kyphosiswas T5 in one patient,T11 in one,and T12 in five.There was old fracture in five patients,congenital deformity in one,and neurofibromatosis in one.The first 30?~35? of kyphosis were corrected using the closing wedge technique with the hinge of the anterior longitudinal ligament after veretebrectomy and circumspinal decompression of the spinal cord.Then the hinge was moved posteriorly to the spinal cord and the remainder of the requisit angle of osteotomy was corrected using the opening-wedge technique(closing-opening wedge osteotomy).Spinal curvature was stabilized using posterior instrumentation and graft.[Result]Localized kyphosis was reduced from and average of 67? to 18? at 2.2 to 7.5 years ' follow-up.Sagittal alignment from T1 to the sacrum became more physiologic than before.There were no neurologic complications.Bony fusion was achieved in all patients,and there was no correction loss.[Conclusion]Satisfactory correction is safely performed by closing-opening wedged osteotomy with a direct visuzlization of the circumferentiall decompressed spinal cord.Although the performance is technically laborious,it offers good correction without jeopardizing the integrity of the spinal cord.

STUDY DESIGN: Examination of hyaluronidase-4 (Hyal-4) expression in a rat spinal cord hemisection model. PURPOSE: To determine the status of Hyal-4 expression after hemisection of the spinal cord, and the relationship between its expression and that of chondroitin sulfate proteoglycans (CSPGs). OVERVIEW OF LITERATURE: CSPGs are expressed at the site of spinal cord injury and inhibit axon regeneration. Administration of exogenous chrondroitinase ABC (ChABC), derived from bacteria, digested CSPGs and promoted axonal regrowth. Using a rat hemisection model, we have demonstrated peak CSPGs levels at by 3 weeks after injury but then decreased spontaneously. Could there be an endogenous enzyme similar to ChABC in the spinal cord? It has been suggested that Hyal-4 is involved in CSPG degradation. METHODS: A rat hemisection model was prepared and spinal cord frozen sections were prepared at 4 days and 1, 2, 3, 4, 5, and 6 weeks post-cordotomy and stained for CSPGs and Hyal-4 and subjected to Western blotting. RESULTS: CSPGs appeared at the injury site at 4 days after hemisection, reached a peak after 3 weeks, and then decreased. Hyal-4 was observed around the injury site from 4 days after cordotomy and increased until after 5-6 weeks. Double staining showed Hyal-4 around CSPGs. Western blotting identified a band corresponding to Hyal-4 from 4 days after hemisection. CONCLUSIONS: Hyal-4 was expressed in a rat hemisection model in areas surrounding CSPGs, and as its peak was delayed compared with that of CSPGs. These results suggest the involvement of Hyal-4 in the digestion of CSPGs.
Animals ; Axons ; Bacteria ; Blotting, Western ; Chondroitin Sulfate Proteoglycans ; Cordotomy ; Digestion ; Frozen Sections ; Hyaluronoglucosaminidase ; Rats* ; Regeneration ; Spinal Cord Injuries ; Spinal Cord*

Subchondral insufficiency fracture (SIF) of the femoral head is one of the predominant etiologies of rapidly progressive osteoarthritis of the hip (RPOH). SIF is a rare disease that causes acute pain in the hip joint. It is most frequently found in elderly women with osteoporosis. It is often underdiagnosed or misdiagnosed as osteonecrosis of the femoral head. SIF is currently a well-established cause of RPOH; however, the deeper etiology of SIF is not clear. Good clinical outcomes have been reported for hip preservation therapy and hip replacement. SIF is not obvious radiologically in the early stage, and a T1-weighted magnetic resonance imaging shows a discontinuous low-intensity band under the articular cartilage convex to the articular surface as its characteristic manifestation. Some patients will lose the opportunity to preserve the hip joint due to symptoms such as progressive joint space narrowing and subchondral collapse within a very short period. Patients with progressive hip space narrowing and subchondral collapse on Xray should be converted to total hip arthroplasty. Based on the characteristics of the disease, surgeons need to master the clinical and radiological characteristics of SIF and strive for early diagnosis and treatment.

Total hip arthroplasty (THA) has been one of the most successful orthopaedic surgery in the last 50 years, with an excellent survival rate of more than 20 years. However, hip instability, impingement, dislocation, and liner wear remain common causes of THA failure and revision after THA. To minimize the risk of postoperative complications, abnormal spine-pelvic-hip mobility and its impact on THA outcomes have received increasing attention. According to the concept, the patient's pelvic mobility should be fully considered when making preoperative plans for THA. Individualized anteversion and inclination angles should be set according to the patient's sagittal balance and pelvic mobility to reduce the incidence of postoperative adverse events and prolong the life of the prosthesis. In the literature, recent studies have shown that patient aging, postural changes in daily life, high body mass index (BMI), and different surgical approaches and positions can impact spinopelvic mobility. Because changes in pelvic mobility translate into changes in acetabular orientation, excessive intraoperative or postoperative changes in pelvic mobility may result in poor intraoperative prosthesis orientation, postoperative impingement, dislocation, and accelerated liner wear, ultimately shortening the life of the prosthesis. Therefore, it is vital to evaluate and measure spinopelvic mobility preoperatively, investigate the factors that influence intraoperative pelvic mobility changes and the use of assisted positioning devices for accurate cup placement, and observe postoperative changes in pelvic mobility and the resulting adverse outcomes. This review takes the current literature on the spine-pelvic-hip interrelationship as a starting point and presents studies on the factors influencing spinopelvic mobility and the strategies for perioperative management of THA.

Objective: To investigate the laxative effect of reducing the number of daily doses of magnesium oxide (MgO), while maintaining the total daily dose of MgO in patients with good bowel movements.Patients and Methods: The retrospective analysis involved 11 patients with regular bowel movements who were prescribed MgO for constipation upon admission to a nursing care facility accompanied by home visits by a pharmacist. This investigation was conducted before and after reducing the number of daily doses from three to two, or from two to one, over a two-week period.Results: The number of bowel movements was 7.6 ± 3.4 and 6.6 ± 4.0 times for two weeks before and after the change in dosage frequency, respectively. The difference was not statistically significant (P=0.09). The Bristol Stool Form Scale was 3.9 ± 0.9 and 4.0 ± 0.9 two weeks before and after the change, respectively, which was not significant (P=0.93). Two weeks after the change, the MgO regimen remained unchanged and no on-demand laxatives were administered.Conclusions: The results suggest that reducing the number of daily doses of MgO does not affect its laxative action.

We report the case of a 76-year-old man who developed type IA endoleak through the fenestration after 1-debranch TEVAR using a Najuta endograft. The patient was admitted with expansion of the aneurysm after TEVAR, for additional therapy. Type IA endoleak through a fenestration has remained a significant clinical concern and its treatment is challenging. We performed Zone 0 TEVAR using the “Squid-Capture” technique assisted in situ stent-graft fenestration. Cerebral vessels were perfused by a percutaneous cardiopulmonary support system during in situ stent-graft fenestration, and the cerebral branch was clamped at the proximal site. It is difficult to operate the catheter inside the endoskeleton structure of a Najuta endograft, but several innovations were effective. Test dilation of the balloon catheter was performed to ensure that the wire did not interfere with the endoskeleton. Avoiding interference with the endoskeleton is important. The Squid-Capture technique allows safe and secure puncture of the graft. The operation was completed successfully. After this procedure, the endoleak disappeared. It is considered to be a useful method for treatment of endoleak through the fenestration.