Reconstruction of the lateral tibial plateau using a vascular pedicled patellar transplant

A case of surgical reconstruction in posttraumatic necrosis of the lateral tibial plateau after impression fracture is presented. Joint reconstruction was performed by transposition of the distally pedicled lateral third of the patella combined with a cancellous bone graft. The surgical procedure is described and the indications for it are discussed.     

Bacterial flora of the appendix fossa in appendicitis and postoperative wound infection

Bacteria were isolated from 153 (47.5%) swabs of the appendix fossa in 322 patients undergoing appendicectomy. The commonest organism was Bacteroides species found in 78% of specimens. Other Gram-negative bacilli such as Klebsiella, or Enterobacter, and Esch. coli were present in 29 and 27% respectively. Gram-positive cocci were less frequently isolated.A positive culture was obtained more commonly in perforated appendicitis (79%) than where chronic fibrosis, lymphoid hyperplasia, or acute appendicitis was present or when the appendix was normal. Bacteroides was isolated twice as often in perforated appendicitis.The incidence of wound infection was 19% and varied according to the state of the appendix, being 63% in perforated appendicitis and 9.5% where lymphoid hyperplasia was present. Bacteroides was isolated from over 90% of the wound infections.In the patients with perforated appendicitis where effective chemotherapy was given the incidence of wound infection was 15% whereas in untreated or inappropriately treated patients it was over 50%.The isolation of bacteroides requires special precautions to be taken both in the collection of the specimen and laboratory culture. It is important that the chemotherapy of postappendicectomy infections include an antibiotic active against bacteroides.     

Platelet activation markers in patients with venous thromboembolism without predisposing factors

A constant in vitro hypersensitivity of platelets (adenosine diphosphate) has been suggested as a risk factor for arterial and even venous thrombosis. Our aim was to determine phenotypic and functional alterations of platelets by flow cytometry as potential prothrombotic risk factors in patients with a history of unexplained spontaneous venous thrombosis. Forty-nine patients with a history of spontaneous venous thrombosis and no inherited or acquired thrombophilic risk factors were compared with a reference group of 39 healthy volunteers. Flow cytometry (FACS) was used to analyze the surface expression of CD62 (P-selectin) and CD63 in nonactivated platelets and after in vitro stimulation with adenosine diphosphate and thrombin receptor activator peptide 6. Mean fluorescence intensity of CD62 and CD63 surface expression as well as percentage of CD62 and CD63 positive cells and binding index differed in patients with a history of thrombosis compared with the reference group, but failed to reach statistical significance. Similar results were observed after in vitrostimulation with adenosine diphosphate and thrombin receptor activator peptide 6. In conclusion, the expression of CD62 and CD63 of resting and in vitro activated platelets could not be established as a risk factor for spontaneous venous thromboembolism.     

Live now--pay by ageing: high performance mitochondrial activity in youth and its age-related side effects

Radical oxygen species are a byproduct of normal energy metabolism in mitochondria. The short-lived radicals cause damage to their immediate surrounding, i.e. the mitochondria. While most of this damage will be removed by normal mitochondrial turnover, damage to mitochondrial DNA (mtDNA) can persist and may accumulate with age. Recent evidence indicates that mutant mtDNA molecules can accumulate within individual cells, potentially hampering mitochondrial function.     

Heparin-induced thrombocytopenia-alternative anticoagulation in pregnancy and lactation

Heparin-induced thrombocytopenia (HIT) appears rarely in pregnant patients who are being treated with heparin. When HIT is suspected, heparin treatment should be discontinued and alternative anticoagulation should be started. The heparinoid danaparoid appears to be the drug of choice for acute treatment and prophylaxis because of its low placental permeability. Between the 12th and 36th weeks of pregnancy, either danaparoid may be continued or warfarin may be used after recovery of platelet counts. Before and during delivery, danaparoid should be preferred over warfarin in order to avoid bleeding complications in mother and infant. Hirudin should only be used when either cross-reactivity with heparin-induced antibodies or cutaneous allergy against heparinoids are observed. Postpartum warfarin seems to be the treatment of choice because breast-feeding can be continued. Alternative treatment with either danaparoid or hirudin is possible, but data on treatment with these reagents in lactating mothers are very limited.     

Guideline Adherence in Cardiovascular Risk Assessment and Analysis in 15,000 Hypertensive German Patients in Real Life: Results of the Prospective 3A Registry

J Clin Hypertens (Greenwich). 2012;00:00–00. ©2012 Wiley Periodicals, Inc. The benefit obtained from antihypertensive treatment is related more to overall cardiovascular risk reduction than to blood pressure levels. Accurate implementation of cardiovascular diagnostics is a key step toward assessment of cardiovascular risk. In the 3A Registry study, data about patient history, concomitant diseases, diagnostic procedures, and medications were prospectively collected. A total of 14,738 patients recruited by 899 physicians in 2008 and 2009 were analyzed. Assessment of cardiovascular risk factors and subclinical end‐organ damage (SOD) showed broad differences in the implementation of European Society of Hypertension/European Society of Cardiology recommendations. Electrocardiograms were available in 59% of patients, cholesterol in 71.4%, and glucose in 69.7%. Almost all patients (99.6%) had creatinine measurements performed and microalbuminuria was measured in 8.5%. Metabolic syndrome (MS) had been evaluated in 59.7%. Implementation of diagnostic guidelines was highest in hypertensive patients with diabetes, followed by patients with known cardiovascular disease and established chronic renal insufficiency. For hypertensive patients without known comorbidities, the authors estimated that up to 29% had missed SOD (detection rate <50%) and 13% missed MS due to incomplete assessment of risk factors. This large registry study shows that assessment for cardiovascular risk factors and SOD is incomplete. Major efforts are required to improve comprehensive hypertension management as recommended by current guidelines.     

Internalizing Risk Factors for College Students' Alcohol use: A Combined Person- and Variable-Centered Approach

Background: Most studies that investigate internalizing problems (i.e., depression and anxiety symptoms) and alcohol use disorders use variable-centered approaches, losing important information about differences among individuals. Objectives: To group college students by different profiles of alcohol-use risk factors using a person-centered cluster analysis in two separate samples. Methods: Questionnaires were used in both studies to assess positive expectancies regarding alcohol use, coping motives for alcohol use, and symptoms of depression and anxiety. In the first study (2012), we collected information about past month alcohol use, including frequency and binge drinking episode (n = 171). In the second study (2013), we also included measures of externalizing behaviors and negative alcohol-related consequences (n = 526). Results: In Study 1, the cluster analysis identified four groups of students who displayed different patterns of risk: a low-risk group, moderate cognitions/low internalizing cluster, a high internalizing/low coping motives group of drinkers, and a high internalizing/high coping motives cluster of drinkers. This fourth group showed high levels of depression, moderate anxiety, high positive expectancies and coping motives for alcohol use, and reported the highest frequency of alcohol use. Study 2 replicated the findings from the previous study. Three groups of individuals were identified, replicating the low-risk cluster, the moderate cognitions/low internalizing cluster, and the internalizing cluster of drinkers from Study 1. Participants in the latter cluster endorsed the highest number of negative consequences of alcohol use. Conclusions: Results from both studies highlight the importance of tailoring alcohol abuse prevention efforts to a subgroup young adult who endorse internalizing symptoms.