Objective To investigate the reasons of failure of burr hole craniotomy with drainage in patients with chronic subdural hematoma (CSDH) and advantages of survived neuroendoscopic surgery. Methods One hundred patients with CSDH, admitted to our hospital from May 2015 to May 2019, were enrolled. All patients were initially treated by burr hole craniotomy with drainage; 15 showed drainage failure and received survived neuroendoscopic hematoma evacuation. The preoperative and postoperative clinical features and treatment efficacy of these 15 patients were analyzed. Results Out of the 15 failed patients, 6 had drainage tube misplacement, and the other 9 showed drainage obstacle with separated hematoma. In 6 with drainage tube misplacement, 2 had drainage tube placed into the brain tissues, 3 had drainage tube located in the subendothelium of the hematoma, and one had drainage tube located outside the hematoma. Fifteen patients underwent neuroendoscopic hematoma resection, and the curative effect was significant. After 6 months of follow-up, the hematoma disappearance. Two patients were left with limb weakness due to catheter injury and brain tissues during the initial operation. Glasgow outcome scale indicated good prognosis in the remaining 13 patients. Conclusions Burr hole craniotomy should be standardized, and the drainage tube should be located in the hematoma cavity and thorough rinse should be performed. Neuroendoscopic hematoma evacuation is an effective remedy for failure of the first drilling and drainage surgery.

Objective To investigate the changes of perioperative blood glucose in patients with ruptured intracranial aneurysms under keyhole clipping and their prognostic influence factors.Methods Totally, 147 patients with ruptured intracranial aneurysms, admitted to our hospital from July 2010 to July 2012, were selected.The changes of serum glucose on admission and at non-fasting state every day at the hospital, random blood sugar before operation and one day after the operation were analyzed;modified Rankin scale (mRS) was performed to evaluate short-term prognosis of the patients 14 day after the operation;Logistic regression analysis was used to analyze the prognostic influence factors of ruptured intracranial aneurysms under keyhole clipping.Results In the 147 patients with ruptured intracranial aneurysms, 57 (38.8％) had preoperative increased blood glucose and 99 (67.3％) had postoperative increased blood glucose;77 patients had ratio of postoperative/preoperative blood glucose＜1.2, 38 had ratio=1.2-1.5, and 32 had ratio ≥ 1.5.Seventy-eight patients had a good prognosis, while 69 patients gained a poor prognosis.As compared with the good prognosis group, the poor prognosis group had significantly larger percentage of patients with age elder than 60 or with postoperative blood glucose＞7.0 mmol/L, higher Hunt-Hess scale scores and ratio of postoperative/preoperative blood glucose, with significant differences (P＜0.05);multi-factor unconditional Logistic regression analysis indicated that age, postoperative and preoperative blood glucose ratio, postoperative blood glucose and Hunt-Hess scale scores were the independent factors of prognosis.Conclusion In patients with age＞60, Hunt-Hess scale Ⅳ or Ⅴ, postoperative blood glucose＞7.0 mmol/L and postoperative/preoperative blood glucose ratio ≥ 1.5, poor prognosis can be predictive.

Mitochondrial dysfunctions play major roles in ageing. How mitochondrial stresses invoke downstream responses and how specificity of the signaling is achieved, however, remains unclear. We have previously discovered that the RNA component of Telomerase TERC is imported into mitochondria, processed to a shorter form TERC-53, and then exported back to the cytosol. Cytosolic TERC-53 levels respond to mitochondrial functions, but have no direct effect on these functions, suggesting that cytosolic TERC-53 functions downstream of mitochondria as a signal of mitochondrial functions. Here, we show that cytosolic TERC-53 plays a regulatory role on cellular senescence and is involved in cognition decline in 10 months old mice, independent of its telomerase function. Manipulation of cytosolic TERC-53 levels affects cellular senescence and cognition decline in 10 months old mouse hippocampi without affecting telomerase activity, and most importantly, affects cellular senescence in terc cells. These findings uncover a senescence-related regulatory pathway with a non-coding RNA as the signal in mammals.