Insights into the selectivity of polar stationary phases based on quantitative retention mechanism assessment in hydrophilic interaction chromatography.

Hydrophilic interaction chromatography (HILIC) offers different selectivity than reversed-phase liquid chromatography (RPLC). However, our knowledge of the driving force for selectivity is limited and there is a need for a better understanding of the selectivity in HILIC. Quantitative assessment of retention mechanisms makes it possible to investigate selectivity based on understanding the underlying retention mechanisms. In this study, selected model compounds from the Ikegami selectivity tests were evaluated on different polar stationary phases. The study results revealed significant insights into the selectivity in HILIC. First, hydroxy and methylene selectivity is driven by hydrophilic partitioning; but surface adsorption for 2-deoxyuridine or 5-methyluridine reduces the selectivity factor. Furthermore, the retention of 2-deoxyuridine or 5-methyluridine by surface adsorption in combination with the phase ratio explain the difference in hydroxy or methylene selectivity observed among different stationary phases. Investigations on xanthine positional isomers (1-methylxanthine/3-methylxanthine, theophylline/theobromine) indicate that isomeric selectivity is controlled by surface adsorption; however, hydrophilic partitioning may contribute to resolution by enhancing overall retention. In addition, two pairs of nucleoside isomers (adenosine/vidarabine, 2'-deoxy and 3'-deoxyguanosine) provide an example that isomeric selectivity can also be controlled by hydrophilic partitioning if their partitioning coefficients are significantly different in HILIC. Although more data is needed, the current study provides a mechanistic based understanding of the selectivity in HILIC and potentially a new way to design selectivity tests.

Correlation between CT imaging and symptom scores in cystic fibrosis associated chronic sinusitis.

PURPOSE: There are limited guidelines for diagnosing and managing chronic rhinosinusitis (CRS) in the cystic fibrosis (CF) population. While CF patients are known to have significant opacification on paranasal computed tomography (CT), limited evidence suggests that CT findings are not indicative of patients' symptom burden and therefore not a reliable indicator for surgical intervention. This provides a diagnostic challenge for otolaryngologists taking care of this patient population. The purpose of this study is to better define the relationship between objective imaging findings and patients' symptom severity in the CF-CRS population with the goal of providing more selective and effective patient care. MATERIALS AND METHODS: In this retrospective cohort study, 67 patients with CF CRS had their CT scans scored according to a modified Lund Mackay CT score (LMCTS), which was compared to their Sinonasal Outcome Test scores (SNOT-22). Total SNOT-22 and individual domains were evaluated. Pearson's correlation was performed. RESULTS: The overall mean SNOT-22 score was 32.3. The mean LMCTS was 17.6. These metrics correlate with relatively low subjective symptom scores in comparison to the high objective presence of sinus disease. While patients had high LMCTS, there was no correlation found between LMCTS and total SNOT-22 or individual SNOT-22 domains. CONCLUSIONS: CT findings in CF CRS patients do not accurately reflect patients' symptom burden and should not be used as a primary driver in the clinical management of these patients.

Systematic Review of Endolymphatic Sac Tumor Treatment and Outcomes.

OBJECTIVE: Endolymphatic sac tumors are rare neoplasms originating in the endolymphatic sac. Current literature is limited to case reports and small case series. The objective of this study was to systematically review the literature to better describe clinical presentation, treatment options, and outcomes in endolymphatic sac tumors. DATA SOURCE: PubMed, Embase, and Cochrane Library. REVIEW METHODS: A systematic review was performed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines describing human endolymphatic sac tumors. Risk of bias was assessed using a validated critical appraisal checklist for case series. Studies without inclusion of individual patient characteristics, corresponding treatments, and outcomes were excluded. Heterogeneity of data precluded meta-analysis. RESULTS: A total of 82 studies met inclusion criteria, and 253 discrete tumors were analyzed. A total of 23.4% of patients had von Hippel-Lindau disease. Von Hippel-Lindau-associated tumors affected females to males in a 2.4:1 ratio. Patients with von Hippel-Lindau disease displayed earlier average age at diagnosis compared to the sporadic cohort. Surgery was the primary treatment modality and was performed in 88.9% of cases. Adjuvant radiation therapy was employed in 18.7% of cases; 16.2% cases recurred, and 10.6% had progression of residual disease after treatment. Mean time to recurrence or progression was 53.1 ± 52.4 months with a range of 3 to 240 months. CONCLUSION: Endolymphatic sac tumors require a high degree of suspicion for early diagnosis. Complete resection is the standard of care. No strong evidence supports routine use of adjuvant radiation therapy. Given the high rate of recurrence and wide-ranging time to recurrence, long-term follow-up is necessary.

Leveraging a funding collaborative to develop more PhD prepared nurse scientists and leaders.

BACKGROUND: Over its almost 50 year history, The Robert Wood Johnson Foundation (RWJF) has provided about $500M to nursing initiatives focused on education, practice, policy and leadership development. While RWJF was most often the sole funder of many of these initiatives, it has also joined with others to create a larger and more sustained impact on particularly challenging nursing, health, and health care issues. PURPOSE: The purpose of this article was to describe the challenges and opportunities of a unique funding collaborative developed to engage new partners, increase the visibility of doctoral nursing education and increase funding of the RWJF Future of Nursing Scholars program to develop more PhD prepared nurses and nurse faculty. METHODS: Interviews were conducted with several members of the FNS Funders Collaborative as well as the scholars they supported. The perspectives of three funders, a regional philanthropy (IBC Foundation) and two health systems (Cedars Sinai and Sharp HealthCare) are presented here. Together they supported 13 nurses to complete their PhD through the RWJF Future of Nursing Scholars program. FINDINGS: RWJF contributed $20 M and 13 other funders contributed an additional $3Mto the initiative. The additional funds supported 42 nurses to earn their PhD degree through the program. Six of the 13 funders are health systems, four are regional or health related philanthropies, and others include United Health Care, Johnson & Johnson, and the Care Institute. DISCUSSION: There were many lessons learned for RWJF and the other funders. Given the size of RWJF, some other philanthropies were concerned about how contributions would be represented, others wanted their funding to go directly to care improvement. Some health systems were not prepared for their nurses to decrease work time while pursuing further education. The nurse faculty and nurse PhD shortages have persisted now for over a decade. Although FNS made a significant contribution by developing over 200 new nurse PhDs (faculty and leaders), more funding collaborations that engage new and different partners must be developed so that nursing education does not have to focus on the same problems in the next decade.

Treatment Outcomes for Osteoradionecrosis of the Central Skull Base: A Systematic Review.

Objective Osteoradionecrosis (ORN) of the skull base can have catastrophic consequences if not detected early and managed appropriately. This is a systematic review of the different treatment modalities for skull base ORN and their outcomes. Study Design This study is a systematic review. Materials and Methods Two researchers extracted information including patient population, surgical technique, outcomes of interest, and study design. A computerized search of Medline, Embase, and the Cochrane library (January 1990-June 2020) looked for several papers on the subject of skull base ORN. Results A total of 29 studies had met inclusion criteria, including data from 333 patients. Nasopharyngeal carcinoma was the most common primary tumor (85%). Average age at diagnosis of ORN was 55.9 years (range = 15-80 years) and 72.3% of patients were males. The average time to diagnosis of ORN after radiation therapy was 77 months with an average radiation dose of 76.2 Gy (range = 46-202 Gy). Nighty-eight patients (29.4%) also had chemotherapy as part of their treatment regimen. Although all parts of the central skull base were reported to be involved, the clivus and sphenoid bone were the most commonly reported subsites. Trial of medical treatment had a success rate of 41.1%. About 66% of patients needed surgical treatment, either primarily or after failing medical treatment. Success rate was 77.3%. Overall, the surgical treatment was superior to medical treatment ( p < 0.0001). Conclusion ORN is a rare complication of the treatment of skull base tumors. Most cases require surgical treatment, including endoscopic debridement or free flap reconstruction, which has a high success rate. Level of Evidence Level 3 evidence as a systematic review of case studies, case reports, retrospective, and prospective trials with no blinding or controls.

Long-term role of zileuton in the treatment of chronic rhinosinusitis in aspirin exacerbated respiratory disease.

BACKGROUND: Chronic rhinosinusitis (CRS) in the setting of Aspirin Exacerbated Respiratory Disease (AERD) have high rate of treatment failure and disease recurrence. OBJECTIVE: Evaluate the long-term effect of zileuton on sinonasal outcomes in patients with AERD. METHODS: AERD patients were reviewed and divided into two cohorts, depending if they were treated with zileuton during their clinical course. Demographic data, 22-item sinonasal outcome test (SNOT-22), Lund-Kennedy (LK) endoscopy score, duration of treatment, and number of sinus surgeries performed were collected. RESULTS: 40 AERD patients were included, with follow-up duration up to 10 years (avg of 5.2 years). All patients were treated with topical saline and budesonide irrigations, intranasal steroid spray, and montelukast. 19 patients had uncontrolled sinus disease requiring multiple steroid tapers and were switched from montelukast to zileuton (cohort 1, 47.5%) at some point in their treatment. 21 patients (cohort 2, 52.5%) never needed zileuton. The average duration of treatment with zileuton was 6 years. Patients who required zileuton had a worse SNOT-22 (32.1 vs 19, p = 0.117), worse LK score (8.1 vs 7.5, p = 0.504), and higher average number of surgeries (1.9 vs 1.6, p = 0.343). The outcomes in the zileuton cohort trended toward improvement, however these did not reach statistical significance with an improved SNOT-22 from 32.1 to 27.4 (p = 0.617) and LK score from 7.9 to 6.2 (p = 0.092); The addition of zileuton significantly lowered the number of surgeries needed to an average of 0.5 (p < 0.0001). CONCLUSION: Zileuton may help decrease the number of sinus surgeries needed in AERD.

Disease involvement in the central compartment in eosinophilic chronic rhinosinusitis.

OBJECTIVE: To evaluate disease presence in the central compartment (CC) in patients with eosinophilic chronic rhinosinusitis (CRS). METHODS: Patients with eosinophilic CRS were divided into three endotypes: aspirin-exacerbated respiratory disease (AERD), allergic fungal rhinosinusitis (AFRS), and eosinophilic CRS with nasal polyps (eCRSwNP). CT scans were reviewed for CC involvement, defined as the area between the superior nasal septum (SNS) and middle turbinate (MT). CC involvement was measured based on the degree of opacification (0: no opacification, 1: up to 50% opacification, and 2: >50% opacification), and distance from SNS to MT (mm). Patients who had lateralized MTs from prior surgery as the cause of CC widening were excluded. Patients who underwent orbital decompression were included as a control group. RESULTS: Fifty patients in each group (AERD, AFRS, and eCRSwNP) and 50 control patients were included. Average number of surgeries was 2.5 in AERD (p = 0.05), 2 in AFRS (p = 0.4), and 1.7 in eCRSwNP. Preoperative CC distance was significantly higher in AERD versus control, AFRS, and eCRSwNP: 4.2 versus 2.8 mm (p < 0.0001), 4.2 versus 1.9 mm (p < 0.0001), and 4.2 versus 2.7 mm (p < 0.0001), respectively. Postoperatively, CC distance and degree of opacification were significantly higher in AERD versus control, AFRS, and eCRSwNP. Within the AERD group, CC distance was significantly higher postoperatively than preoperatively (6.5 vs. 4.2 mm, p = 0.002). CONCLUSION: CC involvement is more significant in AERD patients and if present, rhinologists should be suspicious of the diagnosis. This area could represent a source of inflammatory load in patients with AERD.

CSF Leak After COVID-19 Nasopharyngeal Swab: A Case Report.

The nasopharyngeal swab has been used with increased frequency since the beginning of the COVID-19 pandemic. Little has been written in the literature regarding the complications arising from this procedure, as it is generally accepted as safe. In this report, we describe a case in which a young woman sustained a traumatic skull base injury during a nasopharyngeal swab for COVID-19. We then discuss the subsequent treatment and outcome. This case demonstrates the potential for significant complications arising from this widespread procedure and the necessity for awareness of these potential complications. Laryngoscope, 131:1927-1929, 2021.

Systematic review of outcomes for endoscopic sinus surgery and subsequent aspirin desensitization in aspirin-exacerbated respiratory disease.

OBJECTIVE: To review and evaluate outcomes of patients with aspirin-exacerbated respiratory disease (AERD) following endoscopic sinus surgery and subsequent aspirin desensitization. METHODS: Electronic searches of OVID MEDLINE (1948 to September 10, 2019), EMBASE (1980 to September 10, 2019), and PubMed were performed on September 10, 2019. A systematic review of the literature was performed using the 2009 PRISMA guidelines. Studies with both preoperative and postoperative data for patients with AERD who underwent sinus surgery and aspirin desensitization were considered appropriate for inclusion. Publications were written in English and included patients aged 18 years or older. RESULTS: Six studies met inclusion criteria for this systematic review. The primary outcome measure was change in symptom profile measured by patient-reported quality of life scores. The results demonstrate statistically significant improvement in symptoms following endoscopic sinus surgery, with sustained improvement following aspirin desensitization. Revision surgery rates were significantly lower in patients maintained on aspirin therapy. CONCLUSION: This review suggests that surgery followed by aspirin desensitization results in improvement in both subjective and objective outcome measures. The adjunctive use of aspirin desensitization allows for long-term stability in symptom scores. Recurrence of polyps and worsening symptoms requiring revision surgery occurs when aspirin maintenance therapy is interrupted.

Application of condition-based maintenance in health care: A concept analysis.

Chronic illness burdens individuals, organizations and society, costing the US $3.5 trillion annually. Transposed from the engineering industry, condition-based maintenance is a novel concept that holds great promise for alleviating this burden by enhancing current health care delivery methods. Aims of this concept analysis include, (a) develop an operational definition for the term condition-based maintenance and (b) discuss the applicability and effectiveness of condition-based maintenance as applied to health care. A search of engineering and health care literature was completed. The search term "condition-based maintenance" was entered into the PubMed, Wiley Interscience Journals, CINAHL, Journals@Ovid, ProQuest Nursing & Allied Health Source, and Emerald databases. A review of the literature was completed to identify the qualities of condition-based maintenance. Utilizing the Walker and Avant method, antecedents, characteristics, and consequences were identified. A conceptual model of condition-based maintenance was developed encompassing two antecedents, four characteristics, and three consequences. Furthermore, a theoretical definition of condition-based maintenance was derived. Focus on the positive effects of proactively monitoring symptoms among chronically-ill persons is needed. Condition-based maintenance advances the National Institute of Nursing Research's focus on symptom science through the development of personalized strategies to treat and prevent the adverse symptoms of illness.

Powered irrigation with suction evacuation for chronic rhinosinusitis in the office setting: A pilot study.

Bacterial infections in the form of adherent biofilms are frequently implicated in the pathogenesis and recalcitrance of chronic rhinosinusitis. The Hydrodebrider, a disposable powered irrigation and suction device, has been developed specifically to remove biofilm from the paranasal sinuses. We conducted a prospective study to evaluate the tolerability and efficacy of the Hydrodebrider in the office setting with the use of local anesthesia. Of the original 13 adults we recruited, 10 completed the entire study protocol. All enrolled patients had previously undergone sinus surgery that involved the creation of a maxillary antrostomy large enough to allow placement of a Hydrodebrider device, and the endoscopic findings in all patients were consistent with chronic sinusitis. The standard visual analog scale for pain (range: 0 to 10) was used to measure tolerability. The 20-Item Sino-Nasal Outcome Test (SNOT-20) for symptoms was completed at baseline and at 1 and 8 weeks after the procedure. The mean pain score obtained immediately after the procedure was only 2.3, indicating that the procedure was well tolerated. The mean SNOT-20 score trended toward improvement during the first week, but then returned to near-preprocedure levels at 8 weeks. In conclusion, powered irrigation with suction is a well-tolerated procedure in the office setting and might be a useful short-term adjunct in the management of recalcitrant chronic sinusitis.

Implementation of Interdisciplinary Rapid Rounds in Observation Units.

Lack of collaboration and communication can lead to medical errors, increased length of stay, and diminished patient satisfaction. The purpose of this project was to improve nurse efficiency, interdisciplinary communication and collaboration, and patient satisfaction with the discharge process through Rapid Rounds. The results demonstrated that interdisciplinary communication and collaboration improved coordination of care, as evidenced by improved Press Ganey percentile rankings for readiness for discharge and speed of the discharge process, increased pharmaceutical interventions, and fewer phone calls to physicians.

Anti-inflammatory effects of miR-21 in the macrophage response to peritonitis.

We investigated the role of microRNA-21 in the macrophage response to peritonitis; microRNA-21 expression increases in peritoneal macrophages after lipopolysaccharide stimulation but is delayed until 48 hours after cecal ligation and puncture. MicroRNA-21-null mice and bone marrow-derived cell lines were exposed to cecal ligation and puncture or lipopolysaccharide, and survival, microRNA-21 levels, target messenger RNAs and proteins, and cytokines were assayed. Macrophages were also transfected with microRNA-21 mimics and antagomirs, and similar endpoints were measured. Survival in microRNA-21-null mice was significantly decreased after lipopolysaccharide-induced peritonitis but unchanged after cecal ligation and puncture compared with similarly treated wild-type mice. MicroRNA-21 expression, tumor necrosis factor-α, interleukin 6, and programmed cell death protein 4 levels were increased after lipopolysaccharide addition in peritoneal cells. Pelino1 and sprouty (SPRY) messenger RNAs were similarly increased early, whereas programmed cell death protein 4 messenger RNA was decreased after lipopolysaccharide, and all microR-21 target messenger RNAs were subsequently decreased by 24 hours after lipopolysaccharide. Transfection with mimics and antagomirs led to appropriate responses in microRNA-21 and tumor necrosis factor-α. Knockdown of microRNA-21 in bone marrow-derived cells showed increased tumor necrosis factor-α and decreased interleukin 10 in response to lipopolysaccharide. Target proteins were unaffected by knockdown as was extracellular signal-regulated kinase; however, the nuclear factor κB p65 subunit was increased after lipopolysaccharide in the microRNA-21 knockout cells. In contrast, there was little change in these parameters after cecal ligation and puncture induction between null and wild-type mice. MicroRNA-21 is beneficial to survival in mice following lipopolysaccharide peritonitis. Overexpression of microRNA-21 decreased tumor necrosis factor-α secretion, whereas suppression of microRNA-21 expression increased tumor necrosis factor-α and interleukin 6, and decreased interleukin 10 levels after lipopolysaccharide. Protein targets of microRNA-21 were not different following suppression of microRNA-21. Nuclear factor κB was increased by suppression of microRNA-21. These findings demonstrate microRNA-21 is beneficial in modulating the macrophage response to lipopolysaccharide peritonitis and an improved understanding of the anti-inflammatory effects of microRNA-21 may result in novel, targeted therapy against peritonitis and sepsis.

Creating a Standardized Process to Meet Core Measure Compliance.

A standardized process to improve compliance with venous thromboembolism prophylaxis and hospital-based inpatient psychiatric services Core Measures was developed, implemented, and evaluated by a clinical nurse specialist team. The use of a 1-page tool with the requirements and supporting evidence, combined with concurrent data and feedback, ensured success of improving compliance. The initial robust process of education and concurrent and retrospective review follow-up allowed for this process to be successful.