Impact of modified-release opioid use on clinical outcomes following total hip and knee arthroplasty: a propensity score-matched cohort study

Modified-release opioids are often prescribed for the management of moderate to severe acute pain following total hip and knee arthroplasty, despite recommendations against their use due to increasing concerns regarding harm. The primary objective of this multicentre study was to examine the impact of modified-release opioid use on the incidence of opioid-related adverse events compared with immediate-release opioid use, among adult inpatients following total hip or knee arthroplasty. Data for total hip and knee arthroplasty inpatients receiving an opioid analgesic for postoperative analgesia during hospitalisation were collected from electronic medical records of three tertiary metropolitan hospitals in Australia. The primary outcome was the incidence of opioid-related adverse events during hospital admission. Patients who received modified with or without immediate-release opioids were matched to those receiving immediate-release opioids only (1:1) using nearest neighbour propensity score matching with patient and clinical characteristics as covariates. This included total opioid dose received. In the matched cohorts, patients given modified-release opioids (n = 347) experienced a higher incidence of opioid-related adverse events overall, compared with those given immediate-release opioids only (20.5%, 71/347 vs. 12.7%, 44/347; difference in proportions 7.8% [95%CI 2.3–13.3%]). Modified-release opioid use was associated with an increased risk of harm when used for acute pain during hospitalisation after total hip or knee arthroplasty.     

Effect of pneumatic leg compression on post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy: a double-blind randomised controlled trial

Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia.     

基于HMGB1/TLR4/NF-κB信号通路研究木兰脂素对急性鼻窦炎大鼠的治疗作用及机制

目的： 观察木兰脂素对急性鼻窦炎(ARS)大鼠的治疗作用，并探讨其通过高迁移率家族蛋白1/ Toll样受体4/核因子-κB(HMGB1/TLR4/NF-κB)信号通路的调控机制方法： 49只大鼠，随机取9 只作为正常组，40只用鼻窦腔内接种金黄色葡萄球菌法制备ARS模型，36只建模成功大鼠随机分为模型组、木兰脂素低剂量组、木兰脂素高剂量组、阳性组，各9只。木兰脂素低剂量组、木兰脂素高剂量组分别灌胃20、80 mg·kg^-1体质量的木兰脂素，模型组和正常组灌胃等体质量溶媒，阳性组灌胃40 mg·kg^-1 体质量左氧氟沙星，连续7 d。给药前、末次给药后1 h评估各组鼻窦炎症状评分；测定给药后各组血白细胞(WBC)计数及中性粒细胞占比，观察鼻窦黏膜病理组织学变化，检测鼻腔灌洗液中肿瘤坏死因子-α(TNF-α)、白介素(IL)-6水平及鼻黏膜中HMGB1、TLR4、NF-κB mRNA和蛋白表达情况结果： 给药后，木兰脂素低剂量组、高剂量组、阳性组的急性鼻窦炎症状评分及血WBC计数均低于模型组，但仍高于正常组，且木兰脂素高剂量组及阳性组均低于木兰脂素低剂量组，差异均有统计学意义(P＜0.05)，而木兰脂素高剂量组与阳性组比较，差异无统计学意义(P＞0.05)。与给药前比较，给药后木兰脂素低剂量组、高剂量组及阳性组急性鼻窦炎症状评分均降低(P＜0.05)，正常组及模型组给药前后无明显差异(P＞0.05)。与模型组比较，木兰脂素低剂量组、木兰脂素高剂量组、阳性组中性粒细胞占比均降低，且木兰脂素高剂量组低于木兰脂素低剂量组，阳性组低于木兰脂素高剂量组，差异均有统计学意义(P＜0.05)，而阳性组与正常组比较，差异无统计学意义(P＞0.05)。HE染色显示，模型组大鼠纤毛脱落、缺失、排列紊乱，黏膜上皮破损、变性，黏膜内及黏膜下可见大量炎症细胞浸润； 木兰脂素低剂量组、木兰脂素高剂量组及阳性组上述病理变化均减轻，且木兰脂素高剂量组和阳性组炎症反应减轻更为明显。与模型组比较，木兰脂素低剂量组、木兰脂素高剂量组、阳性组鼻腔灌洗液中 TNF-α、IL-6水平及鼻黏膜中HMGB1、TLR4、NF-κB mRNA和蛋白相对表达量均降低，但仍高于正常组，且木兰脂素高剂量组及阳性组均低于木兰脂素低剂量组，差异均有统计学意义(P＜0.05)，而木兰脂素高剂量组及阳性组比较，差异无统计学意义(P＞0.05)结论： 木兰脂素治疗ARS效果显著，可能通过HMGB1/TLR4/NF-κB信号通路抑制鼻黏膜炎症反应。     

Reduction of ventricular arrhythmias with synchronized LV pacing—fact,fiction, or fortuitous

Journal of Interventional Cardiac Electrophysiology -     

Potential plants for inflammatory dysfunction in the SARS-CoV-2 infection

Inflammopharmacology - The inflammatory process is a biological response of the organism to remove injurious stimuli and initiate homeostasis. It has been recognized as a key player in the most...     

Oral cancer prediction by noninvasive genetic screening

Oral squamous cell carcinomas (OSCCs) develop in genetically altered epithelium in the mucosal lining, also coined as fields, which are mostly not visible but occasionally present as white oral leukoplakia (OL) lesions. We developed a noninvasive genetic assay using next-generation sequencing (NGS) on brushed cells to detect the presence of genetically altered fields, including those that are not macroscopically visible. The assay demonstrated high accuracy in OL patients when brush samples were compared with biopsies as gold standard. In a cohort of Fanconi anemia patients, detection of mutations in prospectively collected oral brushes predicted oral cancer also when visible abnormalities were absent. We further provide insight in the molecular landscape of OL with frequent changes of TP53, FAT1 and NOTCH1. NGS analysis of noninvasively collected samples offers a highly accurate method to detect genetically altered fields in the oral cavity, and predicts development of OSCC in high-risk individuals. Noninvasive genetic screening can be employed to screen high-risk populations for cancer and precancer, map the extension of OL lesions beyond what is visible, map the oral cavity for precancerous changes even when visible abnormalities are absent, test accuracy of promising imaging modalities, monitor interventions and determine genetic progression as well as the natural history of the disease in the human patient.     

Ex vivo porcine model for eye,eyelid, and orbit movement analysis of 4-mm ferromagnetic foreign bodies in MRI

Graefe's Archive for Clinical and Experimental Ophthalmology - Ferromagnetic foreign bodies (FFB) present during magnetic resonance imaging (MRI) explorations can lead to tissue injury due to...     

Oxygen sensing,anaesthesia and critical care: a narrative review

In 2019, the scientists who discovered how cells sense and adapt to oxygen availability were awarded the Nobel Prize. This elegant sensing pathway is conserved throughout evolution, and it underpins the physiology and pathology that we, as clinicians in anaesthesia and critical care, encounter on a daily basis. The purpose of this review is to bring hypoxia-inducible factor, and the oxygen-sensing pathway as a whole, to the wider clinical community. We describe how this unifying mechanism was discovered, and how it orchestrates diverse changes such as erythropoiesis, ventilatory acclimatisation, pulmonary vascular remodelling and altered metabolism. We explore the lessons learnt from genetic disorders of oxygen sensing, and the wider implications in evolution of all animal species, including our own. Finally, we explain how this pathway is relevant to our clinical practice, and how it is being manipulated in new treatments for conditions such as cancer, anaemia and pulmonary hypertension.