Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com

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Κυριακή 15 Ιανουαρίου 2023

Spontaneous Recovery Rate of Idiopathic Sudden Sensorineural Hearing Loss: A Systematic Review and Meta‐analysis

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Abstract

Purpose

Steroids comprise the mainstay of treatment for idiopathic sudden sensorineural hearing loss (ISSNHL). Since steroidal treatment was integrated to clinical practice guidelines, newly published no-treatment or placebo arms in clinical trials are scarce. To evaluate the effectiveness of steroidal treatment ± hyperbaric oxygen therapy, the data should be compared to spontaneous recovery. The aim of this paper is to find the most accurate spontaneous recovery rate, in the light of which, other treatment modalities should be judged.

Materials and Methods

Eligible studies published until July 2021 were identified through systematic searches of "PubMed", "Web of Science" and "Google Scholar". Retrospective studies and randomized/non-randomized control trials involving only adult participants (≥18 years) with ISSNHL, and placebo/no treatment were included. Only articles that used the American Academy of Otolaryngology–Head and Neck Surgery's diagnostic criteria for ISSNHL were included.

Results

942 records initially identified, 166 duplicates and 753 articles were excluded based on article subject, title, and abstract. The full texts of 13 articles were reviewed. 7 studies were included for qualitative synthesis, 5 papers included in quantitative synthesis. 180 ears were included in pooled statistics. The pooled spontaneous recovery was 60.28% (95% CI = 38.88–79.94%) with a heterogeneity of 86.0% (95% CI = 69.4–93.6%).

Conclusions

Spontaneous recovery of ISSNHL should not be over-looked, as it may be close to 60%. This may have both clinical and research implications.

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Pharmacokinetic and pharmacodynamic study of 3 products of epoetin alfa as single subcutaneous dose in healthy volunteers

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Abstract

Background

Hemax® is an epoetin alfa product developed by Biosidus S.A. in Argentina at the end of the 1980's and has been present in that market since 1991. The initial presentation was a lyophilized powder containing albumin as stabilizer, to best adapt to environmental conditions in developing countries; more recently, a prefilled syringe, albumin-free presentation was developed, since this presentation has become the preferred standard in many markets.

Objective

The primary objective was to compare the pharmacokinetic profile of different formulations of epoetin alfa after a single subcutaneous administration to healthy volunteers of 40,000 IU of Eprex/Erypo® and Hemax® PFS.

Methods

This clinical trial was conceived following an open label, randomized, 3-way 3-period cross-over balanced, and sequential design. The study was conducted on 24 healthy volunteers.

Results

To analyze similarity between Hemax® PFS and the innovator product, Eprex®, AUC and Cmax of both products have been compared. The 90%CI lower limit for the geometric mean ratios was higher than 80% for any comparisons and the 90%CI upper limit for these geometric ratios was below 125% for all the comparisons made, thus demonstrating equivalence between both products.

Conclusion

The comparison between Hemax® PFS and Eprex® resulted in similar 90%CI for Cmax, AUC(0-120 h) and AUC(0-inf) ratios, all of them within the 80-125% interval, with a power above 95% for each ratio. These findings suggest biosimilar patterns for absorption velocity (with Tmax close to 15 h), absorption extent and elimination (with an elimination half-life close to 25-30 h for each formulation)

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Analysis of Otolaryngologic Readmissions at a High‐Volume Quaternary Referral Center

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Analysis of Otolaryngologic Readmissions at a High-Volume Quaternary Referral Center

The study is a retrospective review of readmissions in a high-volume, quaternary care center. Post-operative neck infection and bleeding were the most common reasons for unplanned readmission and are high-value targets in ongoing efforts to mitigate hospital readmission.


Objectives

To identify common reasons for readmission following otolaryngologic surgery at a high-volume center and identify possible risk factors for readmission.

Methods

Retrospective chart review of readmissions identified by hospital-based electronic medical record reporting mechanism.

Results

From January 2019 to September 2020, there were 87 readmissions following 808 index surgeries. The most common reason for readmission was for planned surgery (23%), followed by post-operative neck infection, bleeding, or pneumonia. Patients with unplanned readmissions had significantly longer index admission duration than patients who were not readmitted (median 7 days vs. median 5 days, resp.; p = 0.0056). Analysis of cases of unplanned readmission for neck infection and bleeding identified the oral cavity/pharynx as the most common site of initial surgery and that a majority of patients had a history of radiation therapy.

Conclusion

Neck infection, bleeding, and pneumonia were the most common reasons for unplanned readmission following otolaryngologic surgery, and a large portion of patients required additional procedures during readmission. Unplanned readmissions for bleeding were significantly more costly than readmissions for neck infections. Long-index hospitalizations, index surgery involving the oral cavity and pharynx, and a history of radiation therapy may be useful clinical features that could stratify the risk of readmission.

Level of Evidence

Level 4, retrospective chart review Laryngoscope, 2023

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Myeloid Phenotypes in Tracheostomy‐Associated Granulation Tissue

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Myeloid Phenotypes in Tracheostomy-Associated Granulation Tissue

In patients with indwelling tracheostomy, granulation tissue is a common, recurrent problem that may lead to multiple surgeries, difficulties with decannulation, and even wound contracture leading to stenosis at the site of prosthesis. This study demonstrates that alternatively activated M2 macrophages are increased in airway granulation tissue as determined by gene expression analysis of canonical biomarkers and cell surface antigens assessed by flow cytometry and immunohistochemistry. The monocyte cell populations associated with granulation tissue are predominantly classical subtype and the majority of macrophages were positive for pro-inflammatory marker S100A8/A9 with 36% of macrophages co-localizing the biomarker CD169+, highlighting these cell population as potential therapeutic targets for airway granulation tissue.


Objective(s)

Tracheostomy-associated granulation tissue is a common, recurrent problem occurring secondary to chronic mucosal irritation. Although granulation tissue is composed of predominantly innate immune cells, the phenotype of monocytes and macrophages in tracheostomy-associated granulation tissue is unknown. This study aims to define the myeloid cell population in granulation tissue secondary to tracheostomy.

Methods

Granulation tissue biopsies were obtained from 8 patients with tracheostomy secondary to laryngotracheal stenosis. Cell type analysis was performed by flow cytometry and gene expression was measured by quantitative real-time polymerase chain reaction. These methods and immunohistochemistry were used to define the monocyte/macrophage population in granulation tissue and were compared to tracheal autopsy control specimens.

Results

Flow cytometry demonstrated macrophages (CD45+CD11b+) and monocytes (CD45+FSClowSSClow) represent 23.2 ± 6% of the granulation tissue cell population. The M2 phenotype (CD206) is present in 77 ± 11% of the macrophage population and increased compared to the M1 phenotype (p = 0.012). Classical monocytes (CD45+CD14highCD16low) were increased in granulation tissue compared to controls (61.2 ± 7% and 30 ± 8.5%, p = 0.038). Eighty-five percent of macrophages expressed pro-inflammatory S100A8/A9 and 36 ± 4% of macrophages co-localized CD169, associated with tissue-resident macrophages. M2 gene expression (Arg1/CD206) was increased in granulation tissue (3.7 ± 0.4, p = 0.035 and 3.5 ± 0.5, p = 0.047) whereas M1 gene expression (CD80/CD86) was similar to controls (p = 0.64, p = 0.3). Immunohistochemistry of gra nulation tissue demonstrated increased cells co-localizing CD11b and CD206.

Conclusions

M2 macrophages are the dominant macrophage phenotype in tracheostomy-associated granulation tissue. The role of this cell type in promoting ongoing inflammation warrants future investigation to identify potential treatments for granulation tissue secondary to tracheostomy.

Level of Evidence

3 Laryngoscope, 2023

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Defining the Optimal Duration of Therapy for Hospitalized Patients with Complicated Urinary Tract Infections and Associated Bacteremia

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Abstract
Objective
Limited data are available to guide effective antibiotic durations for hospitalized patients with complicated urinary tract infections (cUTI).
Methods
We conducted an observational study of patients ≥18 years at 24 United States hospitals to identify the optimal treatment duration for patients with cUTI. To increase the likelihood patients experienced true infection, eligibility was limited to those with associated bacteremia. Propensity sco res were generated for an inverse probability of treatment weighted analysis. The primary outcome was recurrent infection with the same species within 30 days of completing therapy.
Results
1,099 patients met eligibility criteria and received 7, 10, or 14 days of therapy. There was no difference in the odds of recurrent infection for 382 (46%) patients receiving 10 days and 452 (54%) patients receiving 14 days of therapy (aOR 0.99, 95% CI, 0.52-1.87). An increased odds of recurrence was observed in 265 (37%) patients receiving 7 days versus 452 (63%) patients receiving 14 days of treatment (aOR 2.54, 95% CI, 1.40-4.60). When limiting the 7-day versus 14-day analysis to the 627 patients who remained on intravenous beta-lactam therapy or were transitioned to highly bioavailable oral agents, differences in outcomes no longer persisted; aOR 0.76, 95% CI, 0.38-1.52. Of 76 patients with recurrent infections, 2 (11%), 2 (10%), and 10 (36%) in the 7, 10, and 14-day groups, respecti vely, had drug-resistant infections (p=0.10).
Conclusion
Seven days of antibiotics appears effective for hospitalized patients with cUTI when antibiotics with comparable IV and oral bioavailability are administered; 10 days may be needed for all other patients.
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Efficacy of Serum Apelin and Galectin‐3 as Potential Predictors of Mortality in Severe COVID‐19 Patients

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Abstract

Background

Apelin is a cardioprotective biomarker while galectin-3 is a proinflammatory and profibrotic biomarker. Endothelial dysfunction, hyperinflammation, and pulmonary fibrosis are key mechanisms that contribute to the development of adverse outcomes in COVID-19 infection. This study aims to analyze the prognostic value of serum apelin and galectin-3 levels to early predict patients at high risk of mortality in patients hospitalized for severe COVID-19 pneumonia.

Methods

The study included 78 severe COVID-19 patients and 40 healthy controls. The COVID-19 patients were divided into 2 groups, survivors and non-survivors, according to their in-hospital mortality status. Basic demographic and clinical data of all patients were collected and blood samples were taken before treatment.

Results

In our study, serum apelin levels were determined to be significantly lower in both non-survivor and survivor COVID-19 patients compared to the control subjects (for both groups, p<0.001). However, serum apelin levels were similar in survivor and non-survivor COVID-19 patients (p>0.05). Serum galectin-3 levels were determined to be higher in a statistically significant way in non-survivors compared to survivors and controls (for both groups; p<0.001). Additionally, serum galectin-3 levels were significantly higher in the survivor patients compared to the control subjects (p<0.001). Positive correlations were observed between galectin-3 and age, ferritin, CK-MB and NT-proBNP variables (r=0.32, p=0.004; r=0.24, p=0.04; r=0.24, p=0.03 and r=0.33, p=0.003, respectively) while a negative correlation was observed between galectin-3 and albumin (r=-0.31, p=0.006). Multiple logistic regression analysis revealed that galectin-3 was an independent predictor of mortality in COVID -19 patients (OR=2.272, 95% CI, 1.106-4.667; p=0.025). When the threshold value for galectin-3 was regarded as 2.8 ng/mL, it was discovered to predict mortality with 80% sensitivity and 57% specificity (AUC: 0.738, 95% CI: 0.611-0.866, p=0.002).

Conclusion

Galectin-3 might be a simple, useful, and prognostic biomarker that can be utilized to predict patients who are at high risk of mortality in severe COVID-19 patients.

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Wnt3a promotes odonto/osteogenic differentiation in vitro and tertiary dentin formation in a rat model

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Abstract

Aim

To investigate the effect of Wnt3a on odonto/osteogenic differentiation of stem cells isolated from human exfoliated deciduous teeth (SHEDs) and reparative dentine formation in a rat model.

Methodology

SHEDs were cultured in media with Wnt3a (50-200 ng/mL). Wnt activation was confirmed by β-catenin immunocytochemistry. Colony-forming unit assay (normalised percentage area), osteogenic gene expression analysis by real-time polymerase chain reaction and mineralisation assays measured by the absorption at 540 nm were performed. Tertiary dentine formation in vivo was evaluated using 8-week-old, male Wistar rats. Cavities with pinpoint pulp exposure by a sharp instrument were prepared at the mesial surface of the first molars. Teeth were divided into (n=6): 1) distilled water (negative control), 2) phosphate-buffered saline (PBS), 3) lithium chloride in DI (20 μM), and 4) Wnt3a in PBS (200 ng/mL). Collagen sponge was used as a scaffold. The cavity was sealed with glass ionomer restoration. Four weeks later, animals were euthanised by sodium pentobarbital (120 mg/kg body weight). Hard tissue formation was evaluated using micro-computerised tomography. Sixty consecutive slides from the initial plane were analysed and calculated as bone/dentine volume per total tissue volume. Paraffin sections (2 μm) were stained with haematoxylin and eosin and Masson's trichrome for morphological evaluation. Data are presented as the mean ± standard error. Mann-Whitney U test was used for two-group comparison. Kruskal Wallis followed by pairwise comparison was employed for three or more group comparisons. Statistical analysis was performed using GraphPad Prism 7. Differences were considered significant at p < 0.05.

Results

Wnt3a decreased SHEDs colony formation and increased OSX, BMP2, and DMP1 expression, corresponding to an increase in mineralisation. Additionally, a significant increase in dentine/bone volume per total tissue volume was observed in Wnt3a treated defects. Dentine bridge formation at the exposure sites treated with Wnt3a demonstrated, while fibrous tissues were observed in the control.

Conclusions

Wnt3a suppressed proliferation, increased osteogenic differentiation of SHEDs and promotes tertiary dentine formation. Wnt3a could be utilised as biological molecule for vital pulp therapy.

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Pediatric inflammatory myofibroblastic tumor of the bladder with ALK–FN1 fusion successfully treated by alectinib

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Abstract

An inflammatory myofibroblastic tumor (IMT) is a mesenchymal neoplasm characterized by the proliferation of myofibroblasts and inflammatory cell infiltration. Although radical resection is the only established treatment strategy for IMT, it can cause functional disorders when vital organs are affected. We describe a case of pediatric IMT of the bladder with FN1–ALK (fibronectin 1–anaplastic lymphoma kinase) fusion. Radical resection might lead to urinary disturbance due to the large tumor size at diagnosis. However, the tumor was successfully treated with alectinib, a second-generation ALK inhibitor, followed by transurethral resection of the bladder tumor without any complications.

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Automatic Dental Biofilm Detection Based on Deep Learning

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Abstract

Aim

To estimate the automated biofilm detection capacity of the U-Net neural network on tooth images.

Material and methods

Two datasets of intraoral photographs taken in the frontal and lateral views of permanent and deciduous dentitions were employed. The first dataset consisted of 96 photographs taken before and after applying a disclosing agent and was used to validate the domain's expert biofilm annotation (intraclass correlation coefficient = 0.93). The second dataset comprised 480 photos, with or without orthodontic appliances, without disclosing agents, and was used to train the neural network to segment the biofilm. Dental biofilm labeled by the dentist (without disclosing agents) was considered the ground-truth. Segmentation performance was measured using accuracy, F1 score, sensitivity, and specificity.

Results

The U-Net model achieved an accuracy of 91.8%, F1 score of 60.6%, specificity of 94.4%, and sensitivity of 67.2%. The accuracy was higher in the presence of orthodontic appliances (92.6%).

Conclusion

Visually segmenting dental biofilm employing a U-Net is feasible and can assist professionals and patients in identifying dental biofilm, thus improving oral hygiene and health.

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Hypothalamic-Pituitary-Gonadal Function, Pubertal Development and Fertility Outcomes in Male and Female Medulloblastoma Survivors: A Single Centre Experience

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Abstract
Background
Endocrine deficiencies, including hypothalamic-pituitary-gonadal axis (HPGA) impairment, are common in survivors of childhood and adolescent medulloblastoma. Still, data regarding pubertal development and fecundity are limited, and few studies assessed HPGA function in males. We aimed to describe HPGA function in a large cohort of patients with medulloblastoma.
Methods
A retrospective study comprising all 62 medulloblastoma patients treated in our center between 1987-2021, who were at least two years from completion of therapy. HPGA function was assessed based on clinical data, biochemical markers, and questionnaires.
Results
Overall, 76% of female patients had clinical or biochemical evidence of HPGA dysfunction. Biochemical evidence of diminished ovarian reserve was seen in all prepubertal girls (n=4). Among the males, 34% had clinical or biochemical evidence of gonadal dysfunction, 34% had normal function , and 29% were age-appropriately clinically and biochemically pre-pubertal. The difference between males and females was significant (p=0.003). Cyclophosphamide-equivalent dose (CED) was significantly associated with HPGA function in females, but not in males. There was no association between HPGA dysfunction and other endocrine deficiencies, length of follow up, weight status, and radiation treatment protocol. Two female and two male patients achieved successful pregnancies, resulting in 6 live births.
Conclusions
HPGA dysfunction is common after treatment for childhood medulloblastoma. This is seen more in females, likely due to damage to the ovaries from spinal radiotherapy. Our findings may assist in counselling patients and their families regarding risk to future fertility and need for fertility preservation.
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