The numerically simulated short circuit currents were compared to

The numerically simulated short circuit currents were compared to fundamental light trapping limits based on geometric optics. Finally, optical losses in the solar cell were analyzed. After identifying these key losses, strategies for minimizing the losses can be discussed. (C) 2011 American Institute

of Physics. [doi:10.1063/1.3602092]“
“The freeze-drying behavior of three model proteins, namely, lysozyme, BSA, and IgG, has been studied using a variety of techniques under two different primary drying conditions (shelf temperatures of -25 degrees C and +25 degrees C, respectively) in an amorphous formulation. Manometric temperature measurements were used to characterize product temperature (T(pr)), sublimation rates, and product resistance (R(p)) during primary drying. Biophysical techniques such as circular dichroism, fluorescence,

Crenigacestat purchase and Fourier transform infrared spectroscopy were used to study protein conformation. Size exclusion Selleck A-1210477 chromatography was used to monitor the formation of high-molecular-weight species (HMWS) over time on storage, and cake morphology was studied using scanning electron microscopy. The differences in the freeze-drying behavior of the three proteins were more evident at higher protein concentrations, where the protein significantly influences the behavior of the formulation matrix. However, these differences were minimized in the aggressive mode and were insignificant at lower protein concentrations where excipients dominated the freeze-drying behavior. Differences in cake morphology were observed between the two drying conditions employed as well as between the three proteins studied. The stability and the protein structure, however, were equivalent for the protein cakes generated using the two different primary drying conditions.”
“Arterial hypertension continues to represent the leading cause of morbidity and mortality www.sellecn.cn/products/mcc950-sodium-salt.html world-wide. Diagnosis and therapy of arterial hypertension

require adequate blood pressure measurements. Blood pressure is affected by constitutional and environmental factors as well as the measurement procedure itself, inducing substantial uncertainty with regard to adequate diagnosis and control of arterial hypertension. Therefore, current guidelines recommend that the diagnosis of arterial hypertension should not be solely based on conventional blood pressure measurements in the physician’s office or in the hospital, but also on out-of-office ambulatory or home blood pressure measurements using clinically validated semi-automated or automated blood pressure measurement devices.

Despite the enormous progress in the field of arterial hypertension, many aspects of blood pressure measurement require further intensive investigation, for example blood pressure measurement in special populations and distinct clinical situations, as well as the applicability and validation of novel measurement approaches and devices.

3735 (3) angstrom and the calculated chemical composition of Bi1

3735 (3) angstrom and the calculated chemical composition of Bi1.896Ti2O6.884. Furthermore, the measured electrical properties of

the sol-gel Bi2Ti2O7 thin film exhibit a ferroelectricity evident from the measured electric field dependent polarization. The observed ferroelectricity of the Bi2Ti2O7 thin film is attributed mainly by Bi atoms occupying 96g site in the unit Selleckchem ALK inhibitor cell with probability of 0.158 based on the refinement result. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3056166]“
“The prevalence of vitamin D deficiency in the general population has become a major public health problem. Vitamin D deficiency might have significant consequences not only to bone health but possibly to autoimmune-, infectious and cardiovascular disease. This has resulted in increased clinical testing for 25-hydroxyvitamin D (25(OH)D) in serum, as circulating 25(OH)D is regarded as the best indicator of adequate exposure to sunlight and dietary intake of vitamin D. There are reportedly over 50 vitamin D metabolites of which 25(OH)D and 1,25(OH)2D are well known to provide clinical information. More recently, there is increasing interest in measuring the C3-epimer of 25(OH)D, which has shown to contribute significantly to the 25(OH)D concentration, particularly in infant populations, and in 24,25(OH)2D, a major catabolite of 25(OH)D

metabolism. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) is an analytical tool that allows the specific Selleckchem SB431542 determination of all relevant vitamin D metabolites, with the potential of performing multiple analyte analysis in a single experimental setting, creating a vitamin D profile. This article reviews recent advances in the quantification of vitamin D metabolites using LC-MS/MS.”
“Purpose: Within oncology, working with patients who are suffering or at end-of-life has been recognized repeatedly as stress-inducing, yet there is little agreement on what specifically nurses may experience as a result of their work. Further, research focused on caring work within the context of hematopoietic stem cell transplant (HSCT) nursing is almost non-existent. PLX3397 chemical structure In light of the gap, this interpretative phenomenological study

focused on enhancing the knowledge and understanding of the effect(s) of nursing work on the psychosocial health and well being of HSCT nurses.

Method: An interpretative phenomenological design grounded in the work of Heidegger and van Manen was used to explore nursing work among HSCT nurses. Twelve nurses from three Canadian tertiary healthcare facilities participated in multiple interviews and focus groups.

Findings: Thematic analysis resulted in the emergence of four core themes and one overarching novel theme, compassionate presence. The discussion provides an overview of the novel finding, compassionate presence, which challenges the notion that working with individuals who are suffering or at end-of-life inevitably leads to adverse psychosocial effects.

The patients in the HIV study group (eleven women and twenty-thre

The patients in the HIV study group (eleven women and twenty-three men) had a mean age of forty-eight years (range, thirty-four to eighty years) and were followed for a mean of seven years (range, four to eleven years). Evaluated outcomes included implant survivorship, Harris hip score, infection rate, activity score, postoperative

Short-Form 36 (SF-36) health survey score, and radiographic outcome.

Results: Kaplan-Meier survival analysis demonstrated no significant difference in aseptic implant survivorship between the HIV and comparison cohorts Combretastatin A4 manufacturer at the five-year (100% vs. 98%, respectively) and ten-year (95% vs. 96.5%, respectively) follow-up times. In addition, at the time of final follow-up, the mean postoperative Harris hip scores (85 points in the HIV group vs. 87 points in the comparison IACS-10759 ic50 group), activity scores (5.7 points in the HIV group vs. 6.1 points in the comparison group), and SF-36 physical (43 points in the HIV group versus 46 points in the comparison group) and mental component summary scores (54 points in the HIV group versus 57 points in the comparison group) were statistically similar between the two cohorts. There were two late infections in the

HIV cohort as compared with none in the comparison cohort.

Conclusions: Our results demonstrated excellent implant survivorship, clinical and radiographic outcomes, and minimal complications at the time of midterm follow-up in the HIV-infected patient group. We believe that the outcomes associated with primary THA are improving in this patient population as a result of better medical management; however, late infections are

potential complications.”
“A 33-year-old woman presented with exercise-related palpitations www.sellecn.cn/products/cb-839.html after an apparently successful catheter-ablation of overt midseptal accessory pathway. Post procedure, the electrocardiogram at rest was normal, while the progressive appearance of delta-wave during treadmill stress testing was recorded. In addition, the occurrence of ventricular preexcitation was reproduced by controlled administration of dobutamine. Detailed understanding of the unusual pathway electrophysiology resulted in specific planning of the second procedure. In the basal state, pacing maneuvers did not demonstrate any evidence of pathway conduction. However, during infusion of dobutamine bidirectional conduction in the right anterior pathway was restored, enabling definitive cure by radiofrequency.

0, 5 8 and <3 pmol/l, P < 0 001; and 15, 9 and 2, P = 0 03,

0, 5.8 and <3 pmol/l, P < 0.001; and 15, 9 and 2, P = 0.03, respectively). Thirty-eight survivors had achieved at least one live birth. Complicated second-trimester abortions (n = 4) were observed primarily in survivors cured with radiotherapy affecting pelvic organs. In conclusion, childhood cancer survivors have signs of diminished ovarian reserve.

However, if the ovarian function is preserved in the early to mid-twenties, it is likely to persist until the mid-thirties, giving a good chance of childbearing. RBMOnline (C) 2013, Reproductive Healthcare Ltd. Published by Elsevier Ltd. All rights reserved.”
“We report the study of L1(0) see more ordered FePt-C nanogranular perpendicular anisotropy films and a media consisting of an 8 nm thick FePt-C hard magnetic layer covered with a 2 nm thick soft magnetic layer (CoFe and

FePt-C). All the films were fabricated on oxidized Si substrates with a (100) textured polycrystalline MgO intermediate layer of 10 nm in thickness. Cosputtering of Fe, Pt, and C on the MgO layer results the formation of L1(0) ordered FePt nanogranular films with a strong c-axis texture and the average FePt particle size of about 5 nm with a narrow particle size distribution of 1.4 nm in standard deviation. Perpendicular coercivity is controllable between 7 and 12 kOe. The coercivity and the saturation field of the FePt-C granular films can be reduced by 55% and 38%, respectively, with the capping of thin soft magnetic layer. This study demonstrates that the FePt-C system accomplishes suitable nanogranular structures and magnetic properties for ultrahigh-density PCI-32765 perpendicular recording media. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3075986]“
“Objective-To evaluate the relationship between width and depth of surgical margins, amount of edema within and around the tumor, and degree of demarcation between the tumor

and surrounding tissues with the clinical outcome following surgical removal of cutaneous mast cell tumors (cMCTs) in dogs.

Design-Retrospective cohort study.

Animals-100 dogs with 115 resectable cMCTs.

Procedures-Information about selleck kinase inhibitor the dogs’ clinical outcomes following cMCT removal was obtained from primary care veterinarians. Histologic sections of excised tumors were assessed retrospectively for tumor grade and measurement of the narrowest lateral and deep margins of nonneoplastic tissue excised with the tumors; edema within the tumor and surrounding tissues was assessed as minimal, moderate, or severe. Tumors were classified as poorly, moderately, or well demarcated on the basis of the degree of mast cell infiltration into the adjoining connective tissue.

Results-Following tumor excision (with no additional postsurgery treatment), 96 dogs had no local recurrence or metastatic disease for 27 to 31 months; 4 metastatic disease related deaths (dogs with grade II or Ill tumors) occurred within 3 to 9 months.

Setting: NICU, Department of Pediatrics of Padua University, Padu

Setting: NICU, Department of Pediatrics of Padua University, Padua, Italy.

Subjects: WBC count was evaluated in 71 preterm neonates (< 32 weeks of gestation) with HCA and in a control group without HCA on day 1, 3, and 6 after delivery. Logistic regression analysis and diagnostic accuracy analysis were used to assess the association between WBC counts and HCA. Main results: WBC levels were significantly higher in infants with HCA than in those without HCA (Median IQR, PKA inhibitor WBC (x10(9)/l): day 1, 13.2 (6.2-21.8) vs 8.1 (6-11.4), p < 0.001; day 3, 17.4 (11.4-26.9) vs 6.3 (5.2-8.3), p < 0.001; day 6, 18.4 (11.1-31) vs 6.5 (4.4-9), p < 0.0001). The neonatal WBC count on the third day of life was the most sensitive parameter associated with HCA (sensitivity: 0.80; specificity: 0.88). The cut-off value based on the ROC curve was 10 (x10(9)/l). Conclusions: WBC count in the third day of life is strongly associated with HCA.”
“Objective: To evaluate lymphocyte subpopulations’ change and impact on the

pregnancy outcome in fetal growth restriction (FGR) through a prospective cohort study. Methods: Sixty singleton pregnancies with FGR and 20 normal pregnant women were enrolled at the third trimester of pregnancy in this GSK1210151A concentration study. FGR was defined according to fundal height and abdominal circumference through obstetric examination and ultrasound examination. Third trimester peripheral blood and umbilical cord blood lymphocyte subpopulations were analysed by flow cytometry. The cytotoxic activity of lymphocytes using umbilical cord blood mononuclear activated kill cells as the effector cells, K562 cells as the target cells was measured by MTT deoxidation assay. Results: There were no significant differences about

the age, Adriamycin parity, gestational age enrolled, BMI before pregnancy between the FGR and control group. The birth weight, length and head circumference of the neonates from FGR group were less than that from normal control. The percentages of B-lymphocytes in peripheral blood at the third trimester were significantly increased in FGR group compared to that in control group (P < 0.05). In umbilical cord blood, FGR group had a higher percentage of both CD3 and CD4 lymphocyte, lower absolute cell counts and percentage of B-lymphocyte, and higher CD4/CD8 ratio than control group (P < 0.05). Most importantly, the kill cell activity of the lymphocytes in cord blood from FGR group was significantly higher than that from control group (P < 0.05). The significant positive correlations were also found that the percentage and number of B lymphocytes in umbilical cord blood with birthweight, birthlength and birth head circumference, but CD4/CD8 ratio, the kill cell activity in umbilical cord blood had negative correlations with that.


“Background: Kidney function, expressed as glomerular filt


“Background: Kidney function, expressed as glomerular filtration rate ( GFR), is commonly estimated from serum creatinine ( Scr) and, when decreased, Semaxanib purchase may serve as a nonclassical risk factor for incident cardiovascular disease ( CVD). The ability of estimated GFR ( eGFR) to predict CVD events during 5-10 years of follow-up is assessed using data from the Strong Heart Study ( SHS), a large cohort with a high prevalence of diabetes.

Methods: eGFRs were calculated with the abbreviated Modification of Diet in Renal Disease study ( MDRD) and the Cockcroft-Gault ( CG)

equations. These estimates were compared in participants with normal and abnormal Scr. The association between eGFR and incident CVD was assessed.

Results: More subjects were labeled as

having low eGFR (<60 ml/min per https://www.selleckchem.com/products/GSK461364.html 1.73 m(2)) by the MDRD or CG equation, than by Scr alone. When Scr was in the normal range, both equations labeled similar numbers of participants as having low eGFRs, although concordance between the equations was poor. However, when Scr was elevated, the MDRD equation labeled more subjects as having low eGFR. Persons with low eGFR had increased risk of CVD.

Conclusions: The MDRD and CG equations labeled more participants as having decreased GFR than did Scr alone. Decreased eGFR was predictive of CVD in this American Indian population with a high prevalence of obesity and type 2 diabetes mellitus.”
“Objective: To present the case of a hyperparathyroidism-jaw tumor (HPT-JT) patient with a novel nonsense mutation of the CDC73 gene.

Methods:

We present the case of a patient with a history of three prior maxillectomies and two prior parathyroidectomies who presented with recurrent primary hyperparathyroidism (PHPT). We also briefly review the literature pertaining to HPT-JT.

Results: Genetic analysis revealed a novel nonsense mutation (c.85G>T; pGlu29) in exon 1 of CDC73. The patient’s son underwent genetic testing for a CDC73 mutation and was found to be negative.

Conclusion: HPT-JT is a rare condition characterized by PHPT and benign tumors of the mandible and maxilla. Up to 15% of HPT-JT patients with PHPT have parathyroid carcinoma. HPT-JT is associated with an inactivating mutation of CDC73, a gene that codes for the tumor suppressor protein parafibromin. This report expands our understanding of SU5402 the genetics underlying this rare disorder and emphasizes the importance of early detection in order to prevent hypercalcemic complications such as parathyroid carcinoma.”
“Purpose of reviewGender identity development is poorly understood but impacted by central nervous system (CNS) factors, genes, gonadal hormones and receptors, genitalia, and social/environmental factors. Gender identity disorder (GID) is the diagnostic term to describe persons discontent with the sex they were assigned at birth and/or the gender roles associated with that sex.

9 +/- 57 8 d before conception showed a 7 3-g/L increase in chang

9 +/- 57.8 d before conception showed a 7.3-g/L increase in change in hemoglobin from baseline compared with those

who initiated supplementation at 26.3 +/- 12.3 d after conception (P = 0.01). Among 146 nonpregnant women, IFA decreased anemia (odds ratio: 0.19; 95% CI: 0.04, 0.95) and improved iron stores (P = 0.001) more than did FA.

Conclusion: Good adherence and initiation of supplementation before conception are needed to reduce anemia during early pregnancy. This trial was registered at www.clinicaltrials.gov as NCT00953134. Am J Clin Nutr 2009; 90: 1295-302.”
“Errors encountered in the capacitance-voltage (C-V) measurements of quantum well (QW) structures are usually attributed to Debye smearing. The other sources from which errors may occur are not well discussed in literature. In this paper we have

highlighted the limits of Selleckchem SBC-115076 C-V measurements on QW structures. Simulations have been carried out through the self-consistent solutions of the Schrodinger and Poisson equations for various band offsets, dopings, and temperatures. This will provide guidelines for suitable design of quantum structures for proper C-V measurements. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3462395]“
“Introduction: p53 codon 72 polymorphism has been reported to be associated with bladder cancer incidence, progression and prognosis, but the association is still under debate. A tentative model was constructed to evaluate the association between p53 codon 72 polymorphism and bladder cancer. Subjects Napabucasin solubility dmso and Methods: In this study, a total of 554 participants were enrolled. The genotyping was carried out using PCR-RFLP and DNA direct sequencing. Results: The genotype distribution of p53 codon 72 polymorphism

was significantly different between bladder cancer patients and controls (p = 0.039). In logistic regression, diagnostic age and genotype Pro/Pro were the risk factors for developing an invasive tumor. A 4.526-fold risk was estimated for the patients with Pro/Pro genotype as opposed to non-Pro/Pro genotype to develop invasive selleck compound tumors. However, the extent of p53 codon 72 polymorphism did not predict bladder cancer prognosis. Conclusions: A conceptual mode was constructed; in addition, the moderating and mediating analysis was also carried out in a structural equation model to resolve possible confounding effects. Taken together, p53 codon 72 polymorphism may be associated with bladder cancer incidence and progression, but not prognosis. Further study is needed to evaluate the usefulness of the constructed model in risk assessment. Copyright (C) 2011 S. Karger AG, Basel”
“A high power narrow line width (38 W, 0.09 nm full width at half maximum) external cavity diode laser is investigated for rubidium spin exchange optical pumping of Xe-129. This tunable photon source has a constant line width, independent of operating power or wavelength within a 1 nm tuning range.

Results Of the 2505 patients, 86% (n = 2151) watched the video a

Results. Of the 2505 patients, 86% (n = 2151) watched the video and 14% (n = 354) did not. Watchers shifted their preference more often than nonwatchers (37.9% vs. 20.8%, P < 0.0001) and more often demonstrated a strengthened preference (26.2% vs. 11.1%, P < 0.0001). Among the 806 patients whose preference shifted after watching the video, 55% shifted toward surgery (P = 0.003). Among the 617 who started with no preference, after the video 27% preferred nonoperative care, 22% preferred selleck chemicals llc surgery, and 51% remained uncertain.

Conclusion. After watching the evidence-based

patient decision aid (video) used in SPORT, patients with specific lumbar

spine disorders formed and/or strengthened their treatment preferences in a balanced way that did not appear biased toward or away from surgery.”
“Acute coronary syndromes (ACS) include unstable angina, non-ST-segment elevation myocardial infarction P005091 price (NSTEMI), and ST-segment elevation myocardial infarction (STEMI). The management of ACS has improved greatly over the last 3 decades, with an associated steady decline in mortality from this condition seen in the US. The benefits of advances in the management of ACS observed in the US have not fully extended to Mexico, as thrombolytic therapy remains the most commonly used reperfusion strategy for STEMI and new antithrombotic drugs are not widely available. However, treatment of ACS in Mexico is rapidly evolving. Dual oral antiplatelet therapy with the combination of clopidogrel and aspirin (acetylsalicylic acid) Selleck GSKJ4 is becoming

the new standard of care for the management of patients with NSTEMI and those undergoing percutaneous coronary intervention. Results from controlled clinical Studies strongly support the use of early and aggressive treatment with this combination. The addition of clopidogrel to the national formulary represents an important step in the evolution of care for ACS patients in Mexico. Local and regional leadership is required to foster the widespread adoption of this highly beneficial treatment strategy. The main objectives of this review are to highlight the recommendations of the Mexican guidelines for the management of ACS and provide some perspective regarding challenges to optimal management of ACS patients in Mexico.”
“Novel magnetic nanoparticles with an average size of 350-400 nm with N-methacryloyl-(L)-phenylalanine (MAPA) as a hydrophobic monomer were prepared by the surfactant-free emulsion polymerization of 2-hydroxyethyl methacrylate, MAPA, and magnetite in an aqueous dispersion medium. MAPA was synthesized from methacryloyl chloride and L-phenylalanine methyl ester.

Methods Between January 2001 and December 2010, 48 patients

Methods Between January 2001 and December 2010, 48 patients selleck chemicals llc suffering from VVF were managed through the transabdominal route.

Results The success rate following

first repair was 87.5%. Patients who failed the first repair (n=6) were managed again by the transabdominal route (second attempt). Two of these patients were cured, while another patient was cured after prolonged catheter drainage. One patient was managed by ureterosigmoidostomy (Mainz II) pouch but died after 6 months. The remaining two patients refused further treatment and were lost to follow-up.

Conclusions Transabdominal repair of VVF in properly selected patients results in satisfactory treatment outcome.”
“Purpose: To examine the influence of apoliprotein E epsilon 4 allele (APOE 4) carrier status on disease progression by evaluating the Mizoribine research buy rate of regional gray matter (GM) volume loss and disease severity in patients with newly diagnosed Alzheimer disease (AD) and stable amnestic mild cognitive impairment (MCI).

Materials and Methods: This study was approved by the

institutional review board and was HIPAA compliant. All subjects or their legal representatives gave informed consent for participation. Ninety-five subjects (63 male; average age, 77.1 years; age range, 58-91 years; 51 APOE4 carriers; 44 noncarriers) with either documented MCI to AD conversion or stable amnestic MCI underwent three yearly magnetic resonance imaging examinations. Voxel-based morphometry for image postprocessing and Clinical Dementia Rating (CDR) scale LB-100 supplier for cognitive assessment were used.

Results: In APOE 4 carriers, GM volume loss affected the hippocampi, temporal and parietal lobes, right caudate nucleus, and insulae in patients with

MCI to AD conversion and the insular and temporal lobes in patients in whom MCI was stable. In subjects who were not APOE 4 carriers, there was no significant GM volume change. There were no differences in CDR scores between APOE 4 carriers and noncarriers.

Conclusion: APOE 4 carriers with cognitive decline undergo faster GM atrophy than do noncarriers. The involvement of APOE 4 in the progression of hippocampal atrophy, neocortical atrophy, or both has potential important implications for diagnosis and therapeutic approaches in patients with AD and should be considered in clinical trials. The present results and the results of prior studies indicate that the rate of hippocampal and neocortical atrophy is greater in association with APOE 4 in nondemented elderly subjects, subjects with MCI, and those with AD. (C)RSNA, 2010″
“Introduction and hypothesis This study aims to compare pre-operative Pelvic Organ Prolapse Quantification (POP-Q) point C with and without cervical traction to that obtained intra-operatively in women undergoing pelvic organ prolapse surgery and to assess acceptability of examination with cervical traction without anaesthesia.

All were treated for haematological cancer, 3/7 received haematop

All were treated for haematological cancer, 3/7 received haematopoietic stem cell transplantation (HSCT), and 4/7 received rituximab. Using multivariate analysis, receiving > 1 line of CT was an independent risk factor for HBV-R. Fatal outcome occurred in 3/7 patients (despite lamivudine therapy in two), whereas 2/4 survivors had an HBsAg seroconversion. HBV-R involved non-A HBV genotypes and core promoter and/or precore HBV mutants in all cases. Mutations known to impair HBsAg antigenicity

were detected in HBV DNA from all seven patients. HBV DNA could be retrospectively detected in two patients prior cancer treatment and despite HBsAg negativity. HBV-R is a concern in HBsAg-negative/anti-HBcAb-positive patients undergoing check details cancer therapy, especially in males presenting with haematological cancer,

a low anti-HBsAb titre and more than one chemotherapeutic agent. HBV DNA testing is mandatory to improve diagnosis and management of HBV-R in these patients. The role of specific therapies such as rituximab or HSCT as well as of HBV aa variability deserves further studies.”
“Background: Adequate fibrinogen concentration is a crucial component of sufficient perioperative/posttraumatic hemostasis. In major blood loss, Avapritinib large volumes of fluids are being administered, which have been shown to interfere with valid determination of fibrinogen concentration. This may lead to wrong treatment decisions. We studied the variables that cause the discrepancies between measured and true fibrinogen concentrations in

samples diluted with volume replacement fluids. Methods: Citrated plasma samples of healthy volunteers were diluted by 30% and 50% with phosphate buffered saline (PBS), hydroxyethyl starch (HES) 10% (200/0.5), or gelatine (GEL). Fibrinogen concentrations of diluted samples were derived from the prothrombin time (PT) and the Clauss method (CLS) was applied. With the latter, several modifications and combinations of detection principles and thrombin reagents were investigated. Values were compared with “”true,”" that is, calculated values based on the results of undiluted 8-Bromo-cAMP samples for each method. Results: Photo-optical methods resulted in significant overestimation of the fibrinogen concentration in blood diluted with HES, depending on the thrombin reagent used. This was particularly true for modifications of the CLS aimed at measuring low fibrinogen concentrations. Use of another thrombin reagent gave satisfactory results for this modification. The validity of mechanical end point determination methods was considered sufficient and was not influenced by the use of different thrombin reagents. Conclusions: Fibrinogen determination methods used in situations of major blood loss need to be validated with samples containing significant amounts of volume replacement fluids, particularly colloids.