scholarly journals TEG6s Platelet Mapping assay for the estimation of plasma fibrinogen concentration during cardiovascular surgery: a single-center prospective observational study

2021 ◽  
Author(s):  
Yudai Yamamoto ◽  
Yunosuke Sato ◽  
Miri Takahashi ◽  
Hiroto Yamamoto ◽  
Mayumi Echizen ◽  
...  
Keyword(s):  
Observational Study ◽  
Prospective Observational Study ◽  
Network Formation ◽  
Cardiovascular Surgery ◽  
Characteristic Curve ◽  
Plasma Fibrinogen ◽  
University Hospital ◽  
Fibrinogen Concentration ◽  
Single Center ◽  
Blood Samples

Abstract Purpose The Activator F (ActF) test on the TEG6s Platelet Mapping assay system is a means of quantifying blood viscoelasticity caused by fibrin network formation, triggered by reptilase and factor XIII, while platelets are inhibited. This unique methodology enables the measurement of blood viscoelasticity, even in highly heparinized blood. Here, we investigated whether fibrinogen concentration could be estimated using the ActF test in blood samples obtained during cardiopulmonary bypass (CPB) and after CPB in patients undergoing cardiovascular surgery. Methods We performed a single-center prospective observational study at a university hospital. Forty patients aged ≥ 18 years who underwent elective cardiovascular surgery with CPB were enrolled. Blood samples were drawn after the induction of anesthesia, after declamping of the aorta during CPB, and after the reversal of heparinization using protamine (after CPB). Coagulation profiles were evaluated using the Platelet Mapping assay and standard laboratory tests. Results There were strong correlations between the maximal amplitude of clot strength (MA) in the ActF test and fibrinogen concentration in samples drawn during CPB (R = 0.84, 95% confidence interval [CI] 0.72–0.91; P < 0.001) and after CPB (R = 0.83, 95% CI 0.70–0.91; P < 0.001). The areas under the receiver-operating characteristic curve for the ActF MA for fibrinogen concentrations < 150 mg/dL were 0.86 (95% CI 0.73–1.0) during CPB and 0.98 (95% CI 0.94–1.0) after CPB. Conclusion TEG6s Platelet Mapping ActF MA values strongly correlated with plasma fibrinogen concentration in highly heparinized blood during CPB and yielded highly accurate measurements of low fibrinogen concentrations.

scholarly journals Impact of Sampling Time Variability on Tacrolimus Dosage Regimen in Pediatric Primary Nephrotic Syndrome: Single-Center, Prospective, Observational Study

2022 ◽  
Vol 12 ◽  
Author(s):  
Lingfei Huang ◽  
Junyan Wang ◽  
Jufei Yang ◽  
Huifen Zhang ◽  
Yan Hu ◽  
...  
Keyword(s):  
Nephrotic Syndrome ◽  
Observational Study ◽  
Dosage Regimen ◽  
Prospective Observational Study ◽  
Sampling Time ◽  
Time Variability ◽  
Single Center ◽  
Blood Samples ◽  
Primary Nephrotic Syndrome ◽  
The Impact

Background: Tacrolimus (TAC) is an important immunosuppressant for children with primary nephrotic syndrome (PNS). The relationship between sampling time variability in TAC therapeutic drug monitoring and dosage regimen in such children is unknown.Methods: In this single-center, prospective, observational study, we evaluated the sampling time variability, concentration error (CE), relative CE (RCE), and the impact of the sampling time on TAC dosage regimens in 112 PNS children with 188 blood samples. Nominal concentration (Cnom) at 12-h after last TAC dose was simulated based on observed concentration (Cobs) via previously published pharmacokinetic models, then CE and RCE were calculated. Inappropriate dosing adjustments resulting from deviated sampling time were evaluated based on a target Cnom of 5–10 ng/ml.Results: We found that 32 and 68% of samples were respectively collected early (2–180 min) and delayed (4–315 min). Furthermore, 24, 22, 22, and 32% of blood samples were drawn within deviations of ≤0.5, 0.5–1, 1–2, and &gt;2 h, respectively, and 0.3 ng/ml of CE and 6% RCE per hour of deviation occurred. Within a deviation of &gt;2 h, 25% of Cobs might result in inappropriate dosing adjustments. Early and delayed sampling might result in inappropriate dose holding or unnecessary dose increments, respectively, in patients with Cobs ∼ 5 ng/ml.Conclusions: Variable sampling time might lead to inappropriate dosing adjustment in a minority of children with PNS, particularly those with TAC Cobs ∼ 5 ng/ml collected with a deviation of &gt;2 h.

scholarly journals Factors Enhancing Serum Syndecan-1 Concentrations: A Large-Scale Comprehensive Medical Examination

2019 ◽  
Vol 8 (9) ◽  
pp. 1320
Author(s):  
Kazumasa Oda ◽  
Hideshi Okada ◽  
Akio Suzuki ◽  
Hiroyuki Tomita ◽  
Ryo Kobayashi ◽  
...  
Keyword(s):  
Large Scale ◽  
Prospective Observational Study ◽  
Nitrogen Concentration ◽  
Laboratory Data ◽  
University Hospital ◽  
Endothelial Glycocalyx ◽  
Sample Collection ◽  
Blood Samples ◽  
Triglyceride Concentration ◽  
Medical Examinations

Endothelial disorders are related to various diseases. An initial endothelial injury is characterized by endothelial glycocalyx injury. We aimed to evaluate endothelial glycocalyx injury by measuring serum syndecan-1 concentrations in patients during comprehensive medical examinations. A single-center, prospective, observational study was conducted at Asahi University Hospital. The participants enrolled in this study were 1313 patients who underwent comprehensive medical examinations at Asahi University Hospital from January 2018 to June 2018. One patient undergoing hemodialysis was excluded from the study. At enrollment, blood samples were obtained, and study personnel collected demographic and clinical data. No treatments or exposures were conducted except for standard medical examinations and blood sample collection. Laboratory data were obtained by the collection of blood samples at the time of study enrolment. According to nonlinear regression, the concentrations of serum syndecan-1 were significantly related to age (p = 0.016), aspartic aminotransferase concentration (AST, p = 0.020), blood urea nitrogen concentration (BUN, p = 0.013), triglyceride concentration (p < 0.001), and hematocrit (p = 0.006). These relationships were independent associations. Endothelial glycocalyx injury, which is reflected by serum syndecan-1 concentrations, is related to age, hematocrit, AST concentration, BUN concentration, and triglyceride concentration.

scholarly journals The Incidence, Risk Factors, Predictors, and Prognoses of Cytomegalovirus Reactivation in Immunocompetent Mechanical Ventilation Patients: A Prospective Observational Study

2021 ◽  
Author(s):  
Zhihui Zhang ◽  
Xuesong Liu ◽  
Ling Sang ◽  
Sibei Chen ◽  
Zhan Wu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Mechanical Ventilation ◽  
Observational Study ◽  
Prospective Observational Study ◽  
Area Under The Curve ◽  
University Hospital ◽  
Laboratory Findings ◽  
Cytomegalovirus Reactivation ◽  
Cmv Reactivation ◽  
Immunocompetent Patients

Abstract Background: Cytomegalovirus (CMV) reactivation can seriously affect the clinical prognoses of critically ill patients. However, the epidemiology and predictors of CMV in immunocompetent patients with mechanical ventilation are not very clear. Methods: A single-center, prospective observational study (conducted from June 30, 2017 to July 01, 2018) with a follow-up of 90 days (September 29, 2018) that included 71 CMV-seropositive immunocompetent patients with mechanical ventilation at a 37-bed university hospital general intensive care unit (ICU) in China. Routine detection of CMV DNAemia was performed once a week until 28 days (Day1, 7, 14, 21, 28) and serology, laboratory findings, and clinical data were obtained at admission.Results: Among 71 patients, 13 (18.3%) showed CMV reactivation within ICU 28-day admission. The median time to reactivation was 7 days. CMV reactivation was related to various factors, including body weight, body mass index (BMI), sepsis, NT-proBNP, BUN, and Hb levels (P< 0.05). In the multivariate regression model, BMI, Hb level, and sepsis were associated with CMV reactivation patients (P< 0.05). Moreover, the area under the curve (AUC) of BMI, Hb and BMI combined Hb was 0.69, 0.70, 0.76, respectively. The rate of complications, duration of mechanical ventilation, hospitalization expense, length of ICU stay, and 90-day all-cause mortality rate in patients with CMV reactivation was significantly higher than in those without CMV reactivation (P< 0.05).Conclusions: Among immunocompetent patients with mechanical ventilation, the incidence of CMV reactivation was high. CMV reactivation can lead to various adverse prognoses. BMI, Hb, and sepsis were independent risk factors for CMV reactivation. BMI and Hb may predict CMV reactivation.

Transoral Dermoid Cyst Excision: A Multicenter Prospective Observational Study

2018 ◽  
Vol 159 (6) ◽  
pp. 981-986 ◽  
Author(s):  
Jin Pyeong Kim ◽  
Dong Kun Lee ◽  
Jeong Hwan Moon ◽  
Jung Je Park ◽  
Seung Hoon Woo
Keyword(s):  
Observational Study ◽  
Oral Cavity ◽  
Dermoid Cyst ◽  
Prospective Observational Study ◽  
University Hospital ◽  
Secondary Outcome ◽  
Transoral Surgery ◽  
Cyst Excision ◽  
Surgery Group ◽  
Multicenter Prospective Observational Study

Objective Transoral surgery is becoming a preferred technique because it does not leave any scar after surgery. However, transoral surgery for a dermoid cyst of the oral cavity is not standardized yet, due to the anatomic complexity of this region. The aim of this study was to evaluate the safety and efficacy of a transoral dermoid cyst excision. Study Design Multicenter prospective observational study. Setting University hospital. Subjects and Methods This study was designed as a 4-year prospective multicenter evaluation of dermoid cyst excisions within the floor of mouth. Clinical outcomes and complications related to procedures were evaluated among patients. The primary outcome was the efficacy of the procedure, and the secondary outcome was cosmetic satisfaction of each procedure. Results Twenty-one patients underwent transoral dermoid cyst excisions, and 22 underwent transcervical excisions. In the transoral surgery group, the mean size of the dermoid cyst was 5.35 cm (95% CI, 4.79-5.91), and in the transcervical surgery group, it was 6.19 cm (95% CI, 5.67-6.71). There was no significant differences with respect to overall demographic characteristics between the groups. However, the duration of the operation was shorter with the transoral group than with the transcervical group ( P = .001), and cosmetic satisfaction was much better in the transoral group ( P < .001). Conclusion Transoral dermoid cyst excision is a potentially safe and effective method that can lead to easy and quick removal of an oral cavity dermoid cyst, with excellent cosmetic outcomes.

Long‐term efficacy of add‐on stiripentol treatment in children, adolescents, and young adults with refractory epilepsies: A single center prospective observational study

Epilepsia ◽  
2019 ◽  
Vol 60 (11) ◽  
pp. 2255-2262 ◽  
Author(s):  
Anna Rosati ◽  
Alessandra Boncristiano ◽  
Viola Doccini ◽  
Alessandra Pugi ◽  
Tiziana Pisano ◽  
...  
Keyword(s):  
Young Adults ◽  
Observational Study ◽  
Prospective Observational Study ◽  
Adolescents And Young Adults ◽  
Single Center ◽  
Term Efficacy
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