Hard or calcified discs are often adherent to surrounding nerve tissue. The whole herniated disc is difficult to remove by pulling part of the hernia mass, which makes obtaining good results through endoscopic treatment difficult. The purpose of this study was to describe the details of the transforaminal endoscopic lumbar discectomy technique for a hard or calcified disc and report the clinical results. From October 2016 to June 2019, 43 consecutive cases diagnosed as hard or calcified lumbar disc herniation at our institution and treated with transforaminal endoscopic discectomy were evaluated. Endoscopic decompression was performed in patients with hard or calcified lumbar disc herniation. The preoperative visual analog scale score for leg pain (mean ± standard deviation) was 7.09 ± 1.74. The score improved to 2.55 ± 1.35 at 1 week postoperatively, 1.88± 1.29 at 4 weeks postoperatively, and 1.58 ± 1.0 at 26 weeks postoperatively (P < 0.01 for all). The preoperative Oswestry Disability Index (mean ± standard deviation) was 55.4 ± 23.04, which improved to 30.89 ± 13.64 at 1 week postoperatively, 23.08 ± 11.64 at 4 weeks postoperatively, and 16.42 ± 9.76 at 26 weeks postoperatively (P < 0.01 for all). Two patients developed a dural laceration. Both patients were discharged after several hours of observation. None of the patients had postoperative infection, epidural hematoma, or delayed neurological deterioration. Transforaminal endoscopic discectomy could be an effective treatment method for a selected group of patients with hard or calcified lumbar disc herniation. Transforaminal endoscopic discectomy could be an effective treatment method for a selected group of patients with hard or calcified lumbar disc herniation. Simulation allows surgical trainees to acquire surgical skills in a safe environment. With the aim of reducing the use of animal experimentation, different alternative nonliving models have been pursued. However, one of the main disadvantages of these nonliving models has been the absence of arterial flow, pulsation, and the ability to integrate both during a procedure on a blood vessel. In the present report, we have introduced a microvascular surgery simulation training model that uses a fiscally responsible and replicable pulsatile flow system. We connected 30 human placentas to a pulsatile flow system and used them to simulate aneurysm clipping and vascular anastomosis. The presence of the pulsatile flow system allowed for the simulation of a hydrodynamic mechanism similar to that found in real life. In the aneurysm simulation, the arterial flow could be evaluated before and after clipping the aneurysm using a Doppler ultrasound system. When practicing anastomosis, the use of the pulsatile flow system allowed us to assess the vascular flow through theanastomosis, with verification using the Doppler ultrasound system. Leaks were manifested as "blood" pulsatile ejections and were more frequent at the beginning of the surgical practice, showing a learning curve. We have provided a step-by-step guide for the assembly of a replicable and inexpensive pulsatile flow system and its use in placentas for the simulation of, and training in, performing different types of anastomoses and intracranial aneurysms surgery. We have provided a step-by-step guide for the assembly of a replicable and inexpensive pulsatile flow system and its use in placentas for the simulation of, and training in, performing different types of anastomoses and intracranial aneurysms surgery. Previous studies have suggested that interleukin (IL)-17A is a key factor that contributes to intervertebral disc degeneration (IDD), whereas autophagy has been shown to be a protective mechanism in IDD. However, the relationship between IL-17A and autophagy in IDD remains to be fully elucidated. This study sought to evaluate the association between IL-17 and autophagy and the potential mechanism through which IL-17A affects autophagy in IDD. Intervertebral disc specimens were collected from 10 patients with lumbar disc herniation. Human degenerated nucleus pulposus (NP) cells were cultured in the presence or absence of IL-17A treatment. Western blot and monodansylcadaverine staining were used to measure autophagy levels in human degenerated NP cells. Subsequently, phosphatidylinositol 3-kinase (PI3K)/Akt/Bcl-2 pathway inhibitors were used to reveal the potential mechanism. IL-17A treatment inhibited the autophagic activity in human NP cells in a time- and dose-dependent manner. https://www.selleckchem.com/products/blz945.html Moreover, monodansylcadaverine staining showed that cells treated with IL-17A had significantly fewer changes in their autophagic vacuoles compared with control-treated cells. After IL-17A treatment, expression levels of PI3K, p-Akt, and Bcl-2 in NP cells were significantly increased. Further assays with PI3K/Akt/Bcl-2 inhibitors revealed that IL-17A suppressed autophagy in NP cells by activating the PI3K/Akt/Bcl-2 signaling pathway. These data suggest that IL-17A promotes IDD by inhibiting autophagy through activation of the PI3K/Akt/Bcl-2 signaling pathway and may offer new insights for targeted therapy of this disease. These data suggest that IL-17A promotes IDD by inhibiting autophagy through activation of the PI3K/Akt/Bcl-2 signaling pathway and may offer new insights for targeted therapy of this disease. Extracorporeal shock wave lithotripsy (ESWL) for pancreaticolithiasis is most commonly performed by urologists. We investigated the effects of transitioning from urologist- to gastroenterologist-directed ESWL on case complexity, process measures, and duct clearance. We performed a retrospective study of patients who underwent ESWL for pancreaticolithiasis from 2014 through 2019 at a single center. We collected demographic, clinical, radiographic, and procedural data in duplicate and compared case complexity and process measures between the periods that the procedure was performed by urologists (January 2014 through February 2017; 18 patients, 0/47 patients/month) vs gastroenterologists (March 2017 through December 2019; 61 patients; 1.79 patients/month). We also compared data on pancreatic duct stone characteristics and technical success (duct clearance, determined by imaging analysis). There were no differences in patient demographics, comorbidities, pancreatic stone morphology, or time from referral to ESWL during the period the procedure was performed by urologists vs gastroenterologists.