Partial femoral head replacement: a new innovative hip-preserving approach for treating osteonecrosis of the femoral head and its finite element analysis

Purpose: Controversy remains regarding the optimal treatment for stage III Osteonecrosis of the femoral head (ONFH). This study presents, for the first time, the precise treatment of stage III ONFH using the “substitute the beam for a pillar” technique and performs a comparative finite element analysis with other hip-preserving procedures.Methods: A formalin-preserved femur of male cadavers was selected to obtain the CT scan data of femur. The proximal femur model was reconstructed and assembled using Mimics 20.0, Geomagic, and UG-NX 12.0 software with four different implant types: simple core decompression, fibula implantation, porous tantalum rod implantation, and partial replacement prosthesis. The finite element simulations were conducted to simulate the normal walking gait, and the stress distribution and displacement data of the femur and the implant model were obtained.Results: The peak von Mises stress of the femoral head and proximal femur in the partial replacement of the femoral head (PRFH) group were 22.8 MPa and 37.4 MPa, respectively, which were 3.1%–38.6% and 12.8%–37.4% lower than those of the other three surgical methods.Conclusion: The PRFH group exhibits better mechanical performance, reducing stress and displacement in the ONFH area, thus maintaining femoral head stability. Among the four hip-preserving approaches, from a biomechanical perspective, PRFH offers a new option for treating ONFH

3% diquafosol sodium eye drops in Chinese patients with dry eye: a phase IV study

IntroductionThe efficacy and safety of 3% diquafosol sodium eye drops in Chinese patients with dry eye in the real-world setting remains unclear.Methods3099 patients with dry eye symptoms were screened according to Asia Dry Eye Society latest recommendation. Among them, 3000 patients were enrolled for a phase IV study. We followed up with multiple clinical characteristics including corneal fluorescein staining, tear break up time, Schirmer’s tests, visual acuity, intraocular pressure, and others. The follow ups were performed at baseline, 2 weeks and 4 weeks after treatment.ResultsBased on the results of corneal fluorescein staining and tear break up time, all age and gender subgroups exhibited obvious alleviation of the symptoms among the patients with dry eye, and the data in elderly group showed the most significant alleviation. All the adverse drug reactions (ADRs, 6.17%) were recorded, among which 6% local ocular ADRs were included. Meanwhile, mild ADRs (91.8%) accounted for the most. Most of the ADRs (89.75%) got a quick and full recovery, with an average time at 15.6 days. 1.37% of patients dropped out of the study due to ADRs.DiscussionThe use of 3% diquafosol sodium eye drop is effective and safe in the treatment of dry eye, with a low incidence of ADRs showing mild symptoms. This trial was registered at Chinese Clinical Trial Registry ID: ChiCTR1900021999 (Registration Date: 19/03/2019)

Speedup Critical Stage of Machine Learning with Batch Scheduling in GPU

Part 6: Poster SessionsInternational audienceAs a superior data analysis method, Machine Learning suffers the bottleneck from limited computing capability for many years. With the advent of numerous parallel computing hardwares, modern GPU is becoming a promising carrier for the tasks of Machine Learning. In this paper, we propose an efficient GPU execution framework to speedup the forward propagation process of convolution neural network. By extending the convolution unrolling method to fit this batch mode, we get a significant increase of throughput but very little overhead

Effects of deferoxamine on blood-brain barrier disruption after subarachnoid hemorrhage - Fig 3

<p><b>(A</b>) Occludin immunoreactivity and protein levels in cortex after sham or subarachnoid hemorrhage induction with deferoxamine (DFX) treatment or vehicle at day 3, scale bar = 20μm. Values are mean ± SD; n = 3 for each group, #p<0.01, *p<0.05 vs. SAH+vehicle group at day 3. <b>(B)</b> ZO-1 immunoreactivity and protein levels in cortex after sham or subarachnoid hemorrhage induction with deferoxamine (DFX) treatment or vehicle at day 3, scale bar = 20μm. Values are mean ± SD; n = 3 for each group, #p<0.01 vs. SAH+vehicle group at day 3. <b>(C)</b> Claudin-5 immunoreactivity and protein levels in cortex after sham or subarachnoid hemorrhage induction with deferoxamine (DFX) treatment or vehicle at day 3, scale bar = 20μm. Values are mean ± SD; n = 3 for each group, *p<0.05 vs. SAH+vehicle group at day 3.</p

Computer-Assisted Microcatheter Shaping for Intracranial Aneurysm Embolization

Background: This study investigates the accuracy, stability, and safety of computer-assisted microcatheter shaping for intracranial aneurysm coiling. Methods: Using the solid model, a microcatheter was shaped using computer-assisted techniques or manually to investigate the accuracy and delivery of microcatheter-shaping techniques in aneurysm embolization. Then, forty-eight patients were randomly assigned to the computer-assisted microcatheter-shaping (CAMS) group or the manual microcatheter-shaping (MMS) group, and the accuracy, stability, and safety of microcatheter in the patients were compared between the CAMS and MMS groups. Results: The speed of the successful microcatheter position was significantly faster in the CAMS group than in the MMS group (114.4 ± 23.99 s vs. 201.9 ± 24.54 s, p = 0.015) in vitro. In particular for inexperienced operators, the speed of the microcatheter position with the assistance of computer software is much faster than manual microcatheter shaping (93.6 ± 29.23 s vs. 228.9 ± 31.27 s, p = 0.005). In vivo, the time of the microcatheter position in the MMS group was significantly longer than that in the CAMS group (5.16 ± 0.46 min vs. 2.48 ± 0.32 min, p = 0.0001). However, the mRS score at discharge, the 6-month follow-up, and aneurysm regrowth at the 6-month follow-up were all similar between the groups. Conclusions: Computer-assisted microcatheter shaping is a novel and safe method for microcatheter shaping that introduces higher accuracy in microcatheter shaping during the treatment of intracranial aneurysms. Significant: Endovascular coiling of intracranial aneurysms can be truly revolutionized through computer assistance, which could improve the endovascular treatment of aneurysms

Behavior and activity scores.

<p>Behavior and activity scores.</p

Ferritin immunoreactivity, and the ferritin heavy chain (FTH) and light chain (FTL) protein levels in cortex at day 3 after sham or subarachnoid hemorrhage induction with deferoxamine (DFX) treatment or vehicle, scale bar = 20μm.

<p>Values are mean ± SD; n = 3 for each group, #p<0.01 vs. SAH+vehicle group at day 3.</p