[The hypertensive emergency situation : Recommendations for initial drug therapy management]. / Der hypertensive Notfall : Empfehlungen zum initialen medikamentösen Therapiemanagement.

The hypertensive emergency situation is characterized by an acute-mostly life-threatening-blood pressure derailment with the risk of acute end organ damage. It is an acute manifestation of arterial hypertension, which manifests in a variety of symptoms. The etiology is in most cases long-term (chronic) hypertension as a result of low compliance or inadequate antihypertensive therapy. It can also occur as a first manifestation of arterial hypertension. It requires timely antihypertensive drug therapy, which should be initiated in an intensive or intermediate care unit. The choice of antihypertensive therapy regimen should be based on the underlying end organ damage. Fast-acting, easily controllable and intravenously administered substances should be preferred. The most commonly used substances (groups) are urapidil, nitroglycerin, beta blockers and short-acting calcium channel blockers. With a few exceptions, a deliberate, rapid reduction in blood pressure of no more than 20-25% of the initial value is sufficient for extracerebral causes. A subsequent systolic blood pressure target of 160/100 mm Hg should be aimed for within the next 2-6 h. An overly rapid drop in blood pressure can lead to reduced blood flow to the central nervous system due to changes in autoregulation. Exceptions to this rule are acute aortic dissection and flash pulmonary edema-in these cases, prompt blood pressure normalization should be achieved. The initial acute therapy should be followed by a more detailed investigation of the cause and a long-term therapy setting based on this.

Sex related differences in therapy and outcome of patients with intermittent claudication in a real-world cohort.

BACKGROUND AND AIMS: The prevalence of lower extremity artery disease (LEAD) is increasing worldwide and sex-related differences are a current matter of debate. METHODS: We analysed claims data on unselected patients with in-patient treatment for LEAD with intermittent claudication (IC; Rutherford grade 1-3) from 01.01.2014 to 31.12.2015. Data files included diagnostic and procedural information from two years before index, and a five-year follow-up. RESULTS: Our analysis comprised 42,197 IC patients, thereof 28,520 (68%) male. Male patients were younger (median: 66.4 years vs. 72.6 years) but presented with higher frequency of cardiovascular risk factors such as diabetes (40% female vs. 46% male), atrial fibrillation (13% vs. 17%), chronic coronary syndrome (41% vs. 53%), chronic heart failure (23% vs. 27%), or chronic kidney disease (29% vs. 32%; all p < 0.001; age adjusted). Revascularisation applied in 80% of patients, thereof endovascular approach predominantly in female and surgery in male patients. Concomitant pharmacotherapy with statins (74% at 2 years) and platelet inhibitors (75% respectively) were long lasting below guideline recommendation, under-use being more pronounced in women. Two years after index, one-third of IC patients had subsequent revascularisation, one-quarter progressed to chronic limb threatening ischemia (CLTI), and 2% underwent amputation. Male sex was an independent risk factor for long-term mortality (female HR 0.75; 95%-CI 0.72-0.79; p < 0.001) and CLTI (female HR 0.89; 95%-CI 0.86-0.92; p < 0.001) during follow-up. CONCLUSIONS: The majority of in-patient treated patients for IC are male, presenting with worse cardiovascular risk profiles. In view of a general under-supply with statins and platelet inhibitors, women received somewhat less often preventive medication. Despite low LEAD stages at index, serious prognosis was observed in the long term. Particularly male patients were at high risk for all-cause mortality and the combined endpoint CLTI and death.

[Contrast medium-induced acute kidney injury-Consensus paper of the working group "Heart and Kidney" of the German Cardiac Society and the German Society of Nephrology]. / Kontrastmittelinduzierte akute Nierenschädigung ­ Konsensuspapier der Arbeitsgemeinschaft "Herz ­ Niere" der Deutschen Gesellschaft für Kardiologie ­ Herz- und Kreislaufforschung e. V. und der Deutschen Gesellschaft für Nephrologie e. V.

This consensus paper summarizes the expert consensus and recommendations of the working group "Heart and Kidney" of the German Cardiac Society (DGK) and the German Society of Nephrology (DGfN) on contrast medium-induced acute kidney injury. Potentially nephrotoxic contrast agents containing iodine are frequently used in interventional medicine and for computer tomography diagnostics. Acute kidney injury occurs in approximately 8-17% of patients exposed to contrast media. The risk factors and underlying pathophysiology are discussed and recommendations for the prophylaxis and treatment of contrast medium-induced acute nephropathy are presented.

Infective endocarditis on ICU: risk factors, outcome and long-term follow-up.

OBJECTIVE: To identify factors associated with short-term, intermediate and long-term outcome in patients with infective endocarditis (IE) and the need for treatment on intensive care unit (ICU). DESIGN AND SETTING: Retrospective analysis and long-term follow-up by questionnaire in the two medical ICUs of our university hospital. PATIENTS: We conducted a retrospective analysis of all consecutive patients with IE and need for ICU treatment in our department between 2002 and 2009. All patients fulfilled the modified Duke criteria for definite diagnosis of IE. MEASUREMENTS AND MAIN RESULTS: Data of 216 patients (aged 62 ± 14 years, 31 % female) were analyzed, 15.7 % of whom had prosthetic valve endocarditis. Infectious agent (IA) was identified in 74 % and surgery was performed in 57 %. 56 patients (24.9 %) died on ICU, 9 patients were sent to palliative care units and died several days later. During follow-up, another 44 patients died. Multivariate Cox-regression analysis identified the following independent risk factors: High initial SAPS II for 30d-, multiple organ failure and high maximum SAPS II for 100d- and high maximum leukocyte count for long-term mortality. Surgical intervention during ICU was an independent predictor of a better 30d outcome. CONCLUSIONS: In contrast to general IE populations, IA and the type of infected impaired valve are not main predictors of survival in critically ill IE-patients. Biomarker of acute infection and markers for severity of illness (scores and organ failure) are independent risk factors for mortality. The surgical clearance of infected valve, device or abscesses is an independent predictor of 30d outcome.

Synergistic effect of pendant hydroxypropyl and pyrrolidine moieties randomly distributed along polymethacrylamide backbones on in vitro DNA-transfection.

In this work, the cationic monomer N-ethyl pyrrolidine methacrylamide (EPA) was copolymerized with the neutral monomer N-hydroxypropyl methacrylamide (HPMA) at different molar ratios obtaining linear random copolymers that were characterized and evaluated in vitro as non-viral gene carriers using murine Swiss 3T3 fibroblasts. The copolymers with excess or equimolar amount of EPA were able to complex DNA forming stable polyplexes with an average size between 50 and 200 nm, while the copolymers with an excess of HPMA do not. Cell viability was shown to depend on the EPA/HPMA molar ratio, exhibiting the equimolar copolymer poly (EPA-co-HPMA) 50:50 (EPA50) a full cytocompatibility, similar to the HPMA-rich systems. This copolymer EPA50 has also shown significantly higher transfection levels than the systems with other compositions and the positive controls poly L-lysine (PLL) and poly EPA (pEPA). This statistical equimolar copolymer EPA50 has unique properties related to its composition and microstructure, which allows it to complex DNA, showing an excellent biocompatibility and high transfection efficiency.

Acute and mid-term outcomes after treatment of multiple, recurrent restenoses of the lower limb arteries.

AIM: Recanalization of long segmental occlusions of femoropopliteal arteries can be achieved by angioplasty and implantation of nitinol stents with high procedural success rates. However, due to recurrent in-stent restenoses (ISR) some patients need repeated interventions and their intermediate success rates are uncertain. METHODS: Patients who were treated in our center from March 2008 through February 2011 due to symptomatic ISR (as determined by Duplex sonography) were retrospectively included in the study. After endovascular treatment of their ISR, they were prospectively evaluated with regard to recurrent ISR of the target lesions. RESULTS: A total of 36 limbs (=lesions) in 32 patients (69% male, mean age 69±9 years) were successfully treated by balloon-angioplasty. Adjunctive cutting balloons and drug eluting balloons were used in 78% and 8%, respectively. Mean follow-up was 326 days. Recurrent ISR occurred in 10 (28%) lesions, while 26 (78%) lesions showed no recurrence of ISR. In a multivariate logistic regression analysis, age, gender, cardiovascular risk factors, renal failure and medication with cilostazol were not significantly associated with recurrent ISR. Moreover, the number of previous interventions of the target lesions was not an independent predictor of recurrent ISR. CONCLUSION: Patients with multiple recurrences of ISR seem to have the same prospects of acute and mid-term success for endovascular treatment as those with first presentation of ISR. However, this observation has to be confirmed by prospective, large scale studies with a longer follow-up period to determine the significance of endovascular intervention within the scope of different revascularization approaches for treatment of recurrent ISR.

Analgesic efficacy of opioids in chronic pain: recent meta-analyses.

UNLABELLED: Opioids are regularly administered in acute and cancer pain. In chronic non-cancer pain (CNCP), however, their use is controversial. Previous meta-analyses and randomized controlled trials (RCTs) lack methodological homogeneity and comparable data. Here we analysed the maximum analgesic efficacies of opioids and non-opioids compared with placebo, and of physiotherapy and psychotherapy compared with active or waiting-list controls. We screened 3647 citations and included RCTs if treatment duration was at least 3 weeks, data were sufficient for meta-analysis, and criteria for high quality were met. Only 46 studies (10 742 patients) met the criteria. Weighted and standardized mean differences (WMD, SMD) between pain intensities were pooled to conduct separate meta-analyses for each treatment category. At the end of treatment the WMD for pain reduction (100-point scale) was 12.0 for 'strong' opioids, 10.6 for 'weak' opioids, 8.4 for non-opioids (each vs. placebo), 5.5 for psychotherapy and 4.5 for physiotherapy (each vs. active controls). Dropout rates were high in pharmacological studies. The 95% confidence intervals using the outcomes of control groups did not indicate statistical differences between efficacies of the five interventions. Because not enough eligible head-to-head trials were available, our analysis is limited to adjusted indirect comparisons. The heterogeneity of pre-post pain differences in control groups did not allow the definition of a common comparator. In conclusion, although there were statistically significant differences between maximum treatment efficacies, no intervention per se produced clinically important improvements in average pain intensity. Thus, opioids alone are inappropriate and multimodal treatment programmes may be required for CNCP. LINKED ARTICLES: This article is part of a themed section on Opioids: New Pathways to Functional Selectivity. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2015.172.issue-2.

Micro-lightguide spectrophotometry (O2C®) as a predictor of intermediate outcome in patients with critical limb ischemia after percutaneous transluminal angioplasty (PTA).

AIM: Micro-lightguide spectrophotometry (O2C®) provides easily and rapidly measurable parameters of tissue microcirculation. The aim of this study was to assess whether micro-lightguide spectrophotometer (O2C®) based parameters of the tissue microcirculation can serve as predictors of ulcer healing. Furthermore, we tried to identify cut off values to forecast patient outcome and check other diagnostic meanings of individual O2C-parameters. METHODS: Forty individuals, all suffering from critical limb ischemia and arterial or arteriovenous ulcers were retrospectively investigated concerning O2C®- and ankle/toe brachial index-measurements before and up to two times after percutaneous transluminal angioplasty (PTA). At a median follow-up of 7 (range 3 to 14) months after PTA the current peripheral arterial disease (PAD) status, ulcer healing, adverse cardiovascular events including death and endovascular or surgical treatments were noted. RESULTS: We found in patients with healing wounds a significant increase in oxygen saturation (SO2, median 26.35±26.94%) compared to non-healers (-4.27±25.24%, P=0.006) as well as regarding blood flow (median 41.12±51.23AU vs. -9.46±24.01 AU, P=0.005). Additionally, the parameter rHb separated reliably between arterial and arteriovenous ulcers (P=0.024). In Cox regression models, increases after revascularisation of more than 6 % in SO2 (HRR=6.08, 95%CI 1.56-23.65, P=0.009) and flow decreases of less than 12 AU (HRR 4.95, 95%CI 1.42-17.31, P=0.012) were significantly associated with amputation-free survival. CONCLUSION: The O2C®-parameters SO2 and flow provide prognostic information for ulcer healing as well as for amputation-free survival, and rHB adds information about a possible arterial or arteriovenous genesis of an ulcer.

Bubble Jet agent release cartridge for chemical single cell stimulation.

We present a new method for the distinct specific chemical stimulation of single cells and small cell clusters within their natural environment. By single-drop release of chemical agents with droplets in size of typical cell diameters (d <30 µm) on-demand micro gradients can be generated for the specific manipulation of single cells. A single channel and a double channel agent release cartridge with integrated fluidic structures and integrated agent reservoirs are shown, tested, and compared in this publication. The single channel setup features a fluidic structure fabricated by anisotropic etching of silicon. To allow for simultaneous release of different agents even though maintaining the same device size, the second type comprises a double channel fluidic structure, fabricated by photolithographic patterning of TMMF. Dispensed droplet volumes are V = 15 pl and V = 10 pl for the silicon and the TMMF based setups, respectively. Utilizing the agent release cartridges, the application in biological assays was demonstrated by hormone-stimulated premature bud formation in Physcomitrella patens and the individual staining of one single L 929 cell within a confluent grown cell culture.

Use of paclitaxel-eluting balloons for endotherapy of anastomotic strictures following liver transplantation.

Biliary anastomotic strictures after liver transplantation are a major source of morbidity and graft failure; however, repeated endoscopic therapy has shown variable long-term success rates. Thus the aim of this prospective case series was to evaluate the safety and efficacy of using paclitaxel-eluting balloons in 13 patients requiring treatment for symptomatic anastomotic strictures following liver transplantation. Sustained clinical success-defined as no need for further endoscopic intervention for at least 6 months - was achieved in 12 /13 patients (92 %). One, two, and three interventions were required in 9 (69 %), 1, and 2 patients, respectively (mean number of sessions was 1.46). Mean (± SD) bilirubin level dropped from 6.8 (± 4.1) mg/dL to 1.4 (± 0.9) mg/dL. These promising results justify carrying out a randomized comparative trial to confirm this innovative approach.

[Opioid guidelines: yesterday and today: current guideline recommendations for chronic non-tumor pain]. / Opioidleitlinien: gestern und heute : Aktuelle Leitlinienempfehlungen bei chronischem Nichttumorschmerz.

Guidelines on opioid therapy for patients with chronic non-tumor pain should support pain relief, prevent iatrogenic suffering, collateral health damage and legal restrictions on the availability of opioid analgesics. A total of six North American and two European committees recently developed guidelines which differ from the previous ones by being based on many more randomized controlled trials. In anticipation of lower analgesic effects than are to be expected from solely consensus-based guidelines, they recommended a more thorough control of individual therapeutic opioid trials than before. Drafting recommendations for a preferably individual efficacy prognosis is a further objective of the guidelines. This article will discuss if previous and current recommendations of opioid guidelines meet these requirements.

[Expert consensus statement on interventional renal sympathetic denervation for hypertension treatment]. / Interventionelle renale Sympathikusdenervation zur Behandlung der therapieresistenten Hypertonie.

This commentary summarizes the expert consensus and recommendations of the working group 'Herz und Niere' of the German Society of Cardiology (DGK), the German Society of Nephrology (DGfN) and the German Hypertension League (DHL) on renal denervation for antihypertensive treatment. Renal denervation is a new, interventional approach to selectively denervate renal afferent and efferent sympathetic fibers. Renal denervation has been demonstrated to reduce office systolic and diastolic blood pressure in patients with resistant hypertension, defined as systolic office blood pressure ≥ 160 mm Hg and ≥ 150 mm Hg in patients with diabetes type 2, which should currently be used as blood pressure thresholds for undergoing the procedure. Exclusion of secondary hypertension causes and optimized antihypertensive drug treatment is mandatory in every patient with resistant hypertension. In order to exclude pseudoresistance, 24-hour blood pressure measurements should be performed. Preserved renal function was an inclusion criterion in the Symplicity studies, therefore, renal denervation should be only considered in patients with a glomerular filtration rate > 45 ml/min. Adequate centre qualification in both, treatment of hypertension and interventional expertise are essential to ensure correct patient selection and procedural safety. Long-term follow-up after renal denervation and participation in the German Renal Denervation (GREAT) Registry are recommended to assess safety and efficacy after renal denervation over time.

[Child health check-ups as an instrument in child welfare. First results of compulsory check-up systems in German federal states]. / Früherkennungsuntersuchungen als Instrument im Kinderschutz. Erste Erfahrungen der Länder bei der Implementation appellativer Verfahren.

Routine well-child visits, implemented as a means of secondary prevention and covered by health insurance, lead to early identification of disorders and abnormalities in child development."Guiding principles for children" (by the G-BA) have determined the content of the eleven examinations, ranging from U1 immediately after birth to J1 in adolescence; eight of them take place within the first four years of age. Since cases of child maltreatment, neglect, or abuse became public in 2007, almost all German federal states have established mandatory examination and notification processes in the new child welfare surveillance programs. First results in the German federal states (six of which are exemplarily illustrated) point out that mandatory requirements have collectively increased the frequency of medical check-ups in children, especially starting from four years of age and most significantly in families with social disadvantages (young/single parents, immigrant background, uneducated or socially disadvantaged families), which have so far been difficult to reach. Subsequently, provision of primary prevention (vaccinations and health promotion advice) by pediatricians has also increased. As a sole instrument for the complete identification of threats for children's welfare, however, systems inviting and reminding parents about check-ups are only of limited benefit.

[Heart and kidneys]. / Herz und Niere.

There is strong interaction between heart and kidneys in human beings. Both organs work together in many regulation mechanisms. Thus, heart failure leads in many cases to renal failure due to hemodynamic or hormonal feed-back mechanisms. Vice versa, chronic kidney disease turned out as a major and independent cardiovascular risk factor. Patients who suffer from both heart disease and chronic kidney disease are threatened from a very high morbidity and mortality. Moreover, the number of affected patients has doubled every 8-10 years--a dramatic trend which is ongoing. In many patients suffering from heart and chronic kidney disease, an under-use of cardiologic diagnostics as well as therapies has to be observed due to fears about adverse effects, which further enhances their worse prognosis.

Physiological function and transplantation of scaffold-free and vascularized human cardiac muscle tissue.

Success of human myocardial tissue engineering for cardiac repair has been limited by adverse effects of scaffold materials, necrosis at the tissue core, and poor survival after transplantation due to ischemic injury. Here, we report the development of scaffold-free prevascularized human heart tissue that survives in vivo transplantation and integrates with the host coronary circulation. Human embryonic stem cells (hESCs) were differentiated to cardiomyocytes by using activin A and BMP-4 and then placed into suspension on a rotating orbital shaker to create human cardiac tissue patches. Optimization of patch culture medium significantly increased cardiomyocyte viability in patch centers. These patches, composed only of enriched cardiomyocytes, did not survive to form significant grafts after implantation in vivo. To test the hypothesis that ischemic injury after transplantation would be attenuated by accelerated angiogenesis, we created "second-generation," prevascularized, and entirely human patches from cardiomyocytes, endothelial cells (both human umbilical vein and hESC-derived endothelial cells), and fibroblasts. Functionally, vascularized patches actively contracted, could be electrically paced, and exhibited passive mechanics more similar to myocardium than patches comprising only cardiomyocytes. Implantation of these patches resulted in 10-fold larger cell grafts compared with patches composed only of cardiomyocytes. Moreover, the preformed human microvessels anastomosed with the rat host coronary circulation and delivered blood to the grafts. Thus, inclusion of vascular and stromal elements enhanced the in vitro performance of engineered human myocardium and markedly improved viability after transplantation. These studies demonstrate the importance of including vascular and stromal elements when designing human tissues for regenerative therapies.

[S3 guideline LONTS. Long-term administration of opioids for non-tumor pain]. / S3-Leitlinie LONTS. Langzeitanwendung von Opioiden bei nicht tumorbedingten Schmerzen.

The German Society for the Study of Pain (DGSS) commissioned a meta-analytic review of the evidence on the long-term effects of opioids, non-opioid analgesics and cognitive- behavioral procedures for chronic non-cancer pain. A multidisciplinary expert panel was established to review the evidence and formulate recommendations as far as possible on the basis of means, standard deviations and group sizes from randomized controlled trials. Effect size estimates of analgesic effects (SMDs, WMDs) from studies were below clinical significance, whenever the reported data permitted evaluation and nearly equal for all the investigated medical therapies and pain syndromes. Therefore, the LONTS guidelines focus on the prevention of adverse effects and misuse and a multidisciplinary approach for the treatment of chronic pain is strongly recommended. Principles of opioid prescription and on the management of risks associated with the long-term use of opioids are described.

Low cost production of disposable microfluidics by blister packaging technology.

Large scale production of disposable microfluidics mostly is accomplished by injection moulding techniques today. A cost effective alternative to injection moulding might be vacuum thermoforming of polymer films. Vacuum thermoforming is the basis for medical and pharmaceutical packaging such as pharmaceutical blister packs. It allows for cheap and reliable forming of polymer films and thus seems suitable for the fabrication of disposables. Our goal is to investigate and demonstrate the potential of vacuum thermoforming for the fabrication of microtechnology components. For this purpose we have developed a simple low cost process allowing for the fabrication of disposable microfluidics by vacuum thermoforming.

A randomized controlled trial comparing hydration therapy to additional hemodialysis or N-acetylcysteine for the prevention of contrast medium-induced nephropathy: the Dialysis-versus-Diuresis (DVD) Trial.

Contrast medium-induced nephropathy (CIN) is a serious complication with increasing frequency and an unfavorable prognosis. Previous analyses of surrogate parameters have suggested beneficial effects of hemodialysis that are assessed in this randomized clinical trial. We performed a prospective single-center trial in 424 consecutive patients with serum creatinine concentrations between 1.3- 3.5 mg/dl who underwent elective coronary angiography. Patients were randomized to one of three treatment strategies with all patients receiving pre- and postprocedural hydration: One group received no additional therapy, patients in the second group were hemodialyzed once, and the third group received oral N-acetylcysteine. The frequency of CIN (defined as an increase in serum creatinine>or=0.5 mg/dl) from 48 to 72 h after catheterization was 6.1% in the hydration-only group, 15.9% with hemodialysis treatment, and 5.3% in the N-ACC group (intention-to-treat analysis; P=0.008). There were no differences between the treatment groups with regard to increased (>or=0.5 mg/dl) serum creatinine concentrations after 30-60 days (4.8%, 5.1%, and 3.1%, respectively; P=0.700). Analyses of long-term follow-up (range 63 to 1316 days) by Cox regressions models of the study groups found quite similar survival rates (P=0.500). In contrast to other (retrospective) studies, long-term survival of patients with vs those without CIN within 72 h was not different, but patients who still had elevated creatinine concentrations at 30-60 days suffered from a markedly higher 2-year mortality (46% vs 17%, P=0.002). In conclusion, hemodialysis in addition to hydration therapy for the prevention of CIN provided no evidence for any outcome benefit but evidence for probable harm. Increased creatinine concentrations at 30-60 days, but not within 72 h, were associated with markedly reduced long-term survival.

The evolution of lab-on-A-chip: the Micro-Tele-BioChip.

The vision of multianalyte point-of-care diagnostics (POCT) is a handheld device that every patient can use easily for continuous monitoring of, for example, drug efficiency in the treatment of chronic diseases. Technologies are needed to realise this vision. Some are described here in the prototyping and industrial production of a disposable chip for the Micro-Tele-BioChip (muTBC) platform. muTBC is a technology platform that can be customised to meet specific requirements in drug safety and POCT.

Correction of diffraction effects in confocal Raman microspectroscopy.

A mathematical approach developed to correct depth profiles of wet-chemically modified polymer films obtained by confocal Raman microscopy is presented which takes into account scattered contributions originated from a diffraction-limited laser focal volume. It is demonstrated that the problem can be described using a linear Fredholm integral equation of the first kind which correlates apparent and true Raman intensities with the depth resolution curve of the instrument. The calculations of the corrected depth profiles show that considerable differences between apparent and corrected depth profiles exist at the surface, especially when profiles with strong concentration gradients are dealt with or an instrument with poor depth resolution is used. Degrees of modification at the surface obtained by calculation of the corrected depth profiles are compared with those measured by FTIR-ATR and show an excellent concordance.