Complement system component dysregulation is a distinctive feature of COVID-19 disease: a prospective and comparative analysis of patients admitted to the emergency department for suspected COVID-19 disease

Journal of Thrombosis and Thrombolysis - The complement system (CS) plays a pivotal role in Coronavirus disease 2019 (COVID-19) pathophysiology. The objective of this study was to...     

Diminished pregnancy rates in endometriosis due to impaired uterotubal transport assessed by hysterosalpingoscintigraphy

OBJECTIVE: To investigate uterotubal transport by means of hysterosalpingoscintigraphy (HSSG) in women with and without endometriosis. DESIGN: A prospective observational study. SETTING: University Hospital, Department of Obstetrics and Gynaecology, Division of Reproductive Medicine and Gynaecologic Endocrinology with 350 in vitro fertilisation (IVF)/intracytoplasmic sperm injection (ICSI) cycles and 400 intrauterine insemination (IUI) cycles/year. POPULATION: Cases included 56 infertile women with laparoscopic proven endometriosis and patent fallopian tubes. Twenty-two women with partners suffering from male factor infertility served as controls. METHODS: A diagnostic cycle incorporating HSSG was performed. Subsequently, patients underwent either four cycles of timed intercourse (TI) or IUI in order to achieve pregnancy. If pregnancy did not occur, IVF or ICSI was performed. MAIN OUTCOME MEASURES: Evaluation of uterotubal transport capacity in women with endometriosis and healthy controls. RESULTS: Patients suffering from endometriosis (group I) showed a significant reduction in physiologic uterotubal transport function: While 20 patients (36%) had ipsi- or bilateral uterotubal transport, there was pathological uterotubal transport contralateral to the dominant follicle or a complete failure of transport capacity (negative HSSG) in 36 patients (64%). In the controls (group II), transport function was significantly different: 15 of 22 patients (68%) revealed ipsi- and bilateral tubal demonstration, while 5 patients (22%) showed contralateral transport and 2 patients (10%) showed negative HSSG (P= 0.01). Twenty-three pregnancies were observed (pregnancy rate: 29%). Eleven out of 14 (79%) women with ipsi- or bilateral tubal transport function fell pregnant by means of TI or IUI. In seven of nine patients (78%) with a failure in tubal transport, pregnancy was achieved by IVF/ICSI, despite acceptable semen parameters (P= 0.01). CONCLUSIONS: Endometriosis is significantly associated with a reduction in physiologic uterotubal transport capacity compared with controls. This resulted in diminished pregnancy rates even in women with normozoospermic partners. Therefore, IVF/ICSI may be required even when fallopian tubes are patent or semen quality is normal.     

LTD4 augments TNF releasein vivo andin vitro

In vivo data suggest a role of LTD₄ in mediating endotoxin (LPS)-inducible liver injury in galactosamine-sensitized mice. Leukotriene D₄ (LTD₄) was shown to synergize in this model with subtoxic amounts of LPS in inducing hepatitis. Mice challenged i.v. with a subtoxic dose of LPS [50 ng/kg] showed significant TNF serum levels 90 min later which were sixfold increased by coadministration of 50 g/kg LTD₄. When rat Kupffer cells were challenged with LPS, TNF- measured in the supernatant was significantly increased by LTD₄ [100 pg–100 ng/ml]. Addition of LTD₄ alone did not result in any detectable TNF formation.Since Kupffer cells are known producers of small amounts of LTD₄, it seems feasible that LTD₄ represents an autocrine stimulus of nonparenchymal liver cells. In fact, different LTD₄ synthesis inhibitors and receptor antagonists attenuated LPS-inducible TNF release of rat Kupffer cells supporting the conclusion that LTD₄ acts as an endogenous autocrine enhancer of liver macrophage TNF release.     

The treadmill effect in a fixed budget system

We examine the interaction in the market for physician services when the total budget for reimbursement is fixed. Physicians obtain points for the services they render. At the end of the period the budget is divided by the sum of all points submitted, which determines the price per point. We show that this retrospective payment system involves -- compared to a fee-for-service remuneration system -- a severe coordination problem, which potentially leads to the "treadmill effect". We argue that when market entry is possible, a budget can be efficiency enhancing, if in addition a price floor is used.     

Acute hemorrhagic leukoencephalitis (Hurst’s disease) linked to Epstein-Barr virus infection

A 16-year-old girl presented signs of a common cold in combination with a hemolytic crisis. Within 3 days, she developed reduced consciousness and hemiparesis subsequently followed by coma. CT and MRI scans revealed evidence for raised intracranial pressure and an extensive inflammatory process extending from the brain stem up to the thalamus. The patient died within 3 weeks after onset of first symptoms of intracranial pressure despite maximum intensive care. Neuropathological examination revealed disseminated necrotic lesions and perivascular hemorrhages characteristic for acute hemorrhagic leukoencephalitis (Hursts disease), mainly of the brain stem, diencephalon and cerebellum. Serological results, in situ hybridization and PCR analysis demonstrated an acute Epstein-Barr virus (EBV) infection of the central nervous system. To our knowledge, this is the first reported case of Hursts disease linked to EBV.     

Evaluation of the stereotactic 8G vacuum-assisted breast biopsy in the histologic evaluation of suspicious mammography findings (BI-RADS IV)

PURPOSE: The purpose of this study was to evaluate the potential of the new 8G stereotactic vacuum-assisted breast biopsy (ST-driver, Mammotome; Ethicon Endosurgery) in the histologic evaluation of BI-RADS IV microcalcifications. MATERIALS AND METHODS: Fifty-eight patients with 61 mammographic BI-RADS IV microcalcifications underwent stereotactic vacuum-assisted breast biopsy (SVAB). The new 8G system was mounted on the ST driver, which was formerly used only with the hand-held version under sonographic guidance. The evaluation criteria for each biopsy were minimally invasive and operative histologies, the time needed for biopsy, the amount of bleeding, number of rotations and specimen, the degree of resection, and the complications. RESULTS: Fifty-eight of 61 biopsies were technically successful because > or = 50% were resected (29 x 100%, 8 x 90%, 5 x 80%, 6 x 70%, 3 x 50%, 3 x 0%). In 7 cases with representative biopsies of segmental suspicious microcalcifications, the degree of resection could not be exactly measured. All but 2 biopsies were performed without clinically relevant complications and after gaining enough specimens (? 12.6 specimen, 1.85 rotations). Those 2 patients showed evidence of severe bleeding into the breast tissue and operative revision had to be performed (3.5%). The size of intramammary hematoma was measurable in 27 biopsies and showed a range from 0.5 to 5 cm (? 2.7 cm). The average external bleeding was still low with 16 mL (5-80 mL). In 3 of 61 lesions, it was not possible to gain representative tissue as a result of displacement of the lesion after introducing or shooting the needle. The average time needed for all biopsies was 28.2 minutes for all but 5 very complicated biopsies, which took 16.1 minutes. The histologic findings with further operative workup were: 10 ductal carcinomas in situ (DCIS), 4 atypical ductal hyperplasias, 1 atypical lobular hyperplasias (ALH), 3 lobular carcinomas in situ (LCIS), and 6 invasive ductal carcinomas. In 7 of 12 of the initial DCIS histologies, the operative histology was also DCIS, whereas in 4 of 12, no residual malignant tumor was found. In 1 of 12 patients with an initial DCIS histology, operative histology revealed invasive ductal cancer (8.3%). The cases with lobular lesions (ALH, LCIS) did not show any evidence for residual tissue in the operative workup. Most frequent benign histologies were mastopathy (13), ductal hyperplasia (9), fibroadenoma (8), and sclerosing adenosis (5). The control examinations (maximum 1 year) did not show any signs for a false-negative biopsy. CONCLUSION: The 11-G SVAB has proven to be a perfect adjunct to the existing breast biopsy methods. The new 8G SVAB speeds up the method when used for the same size of lesions and enables the user to representatively biopsy lesions up to 3 cm in diameter. The method is still minimally invasive; however, the amount of hematomas as well as clinically relevant complications is increased.     

Individually adapted examination protocols for reduction of radiation exposure for 16-MDCT chest examinations

OBJECTIVE: The purpose of our study was to develop a simple protocol for reduction of radiation exposure without loss of diagnostic information in chest 16-MDCT. MATERIALS AND METHODS: Two hundred and four patients underwent MDCT of the thorax (Somatom Sensation 16, Siemens). Group 1 was scanned using a standard protocol with 100 mAs(effective) (mAs(eff)). Group 2 was scanned using a dose modulation template (CareDose). Group 3 was scanned with mAs(eff) = body weight (kg). Group 4 was scanned with a combination of weight-adapted mAs(eff) and dose modulation. All other parameters were kept constant. Signal-to-noise ratio was assessed as an objective measurement for image quality, and subjective image quality was rated by three experienced radiologists on a 4-point scale. Effective dose was calculated using dedicated software. RESULTS: The mean noise measurement values were 8.31 H for the 100 mAs(eff) protocol for the regression between weight and signal-to-noise (p < 0.0001), 9.08 H for group 2 (p < 0.0001), 9.0 H for group 3 (p = 0.5051), and 9.98 H for group 4 (p = 0.0152). The median image quality was 1 (1 = highest quality) in all subgroups. The mean effective dose was 6.83 mSv, 5.92 mSv, 4.73 mSv, and 3.97 mSv, respectively. The least correlation between weight and image noise was achieved for the individually weight-adapted protocol and in the weight-adapted with CareDose combination. CONCLUSION: By tube current time product adaptation (kg = mAs(eff)) combined with an online tube current modulation template, a well-balanced examination without significant loss of information was achieved for this specific scanner. Thus, individually adapted protocols for chest 16-MDCT can be recommended.