Publications by authors named "David Chu"

Introduction: Seborrheic dermatitis (SD) affects a large, diverse population and is associated with significant morbidity/burden.

Methods: The Harris Poll conducted online surveys to understand the perceptions, preferences, and experiences regarding treatments of US patients with SD and dermatology healthcare providers (HCPs) from December 2021 to January 2022.

Results: In this survey, patients using SD treatment invested on average 34 min/d treating SD with 5.

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Leukocytosis, defined as an elevated white blood cell (WBC) count, can arise from physiological, infectious, neoplastic, or medication-related causes. While leukocytosis has been well-documented in conditions such as infections and malignancies, drug-induced leukocytosis is relatively rare, particularly in individuals undergoing gender transition therapies. Medroxyprogesterone, a progestin used in both fertility treatments and gender-affirming care, has been associated with hematologic changes, though its role in sustained leukocytosis remains underexplored.

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Background/objectives: Efficacy and safety of roflumilast cream 0.15% were demonstrated in patients aged ≥ 6 years with atopic dermatitis (AD) in two Phase 3 trials. This Phase 3 parallel-group, double-blind trial (INTEGUMENT-PED; NCT04845620) compared the efficacy and safety of roflumilast cream 0.

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Safety and efficacy of roflumilast cream 0.15% for atopic dermatitis (AD) were demonstrated in two 4-week phase 3 trials. Evaluate long-term safety, tolerability, and efficacy of roflumilast cream 0.

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Background: Continent catheterizable channels (CCC) are a mainstay for reconstruction in patients with neurogenic bladders. Common complications include false passage, channel stenosis/difficult catheterization, channel incontinence, and stomal stenosis. This may result in the need for surgical revision or replacement.

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Purpose: Renal ultrasounds are performed in patients with myelomeningocele to screen for markers of kidney health, including hydronephrosis. We evaluated the diagnostic accuracy of hydronephrosis to screen for low kidney function defined by estimated glomerular filtration rate (eGFR).

Materials And Methods: We performed a retrospective cross-sectional study using data from 2 cohorts of children and youth with myelomeningocele.

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The intricate neurofluid dynamics and balance is essential in preserving the structural and functional integrity of the brain. Key among these forces are: hemodynamics, such as heartbeat-driven arterial and venous blood flow, and hydrodynamics, such as cerebrospinal fluid (CSF) circulation. The delicate interplay between these dynamics is crucial for maintaining optimal homeostasis within the brain.

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Introduction: Seborrheic dermatitis (SD) is a common, chronic inflammatory skin disease, but the physical and emotional burden of patients with SD experience has not been well characterized.

Methods: The Harris Poll conducted online surveys of US patients and healthcare providers (HCPs) from December 2021 to January 2022.

Results: Almost half of patients reported that SD negatively impacts their emotional and physical well-being "a lot/a great deal"; HCPs underestimate the level of impact on patients.

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Objective: To obtain physicians' "real-world" perspectives on early experiences with triamcinolone acetonide suprachoroidal injection (SCS-TA) for treatment of patients with uveitic macular edema (UME).

Results: Twelve retina/uveitis specialists in the United States were surveyed about SCS-TA injection procedure and patient outcomes. Survey participants administered ≥ 291 SCS-TA injections to 243 patients with UME with various disease characteristics (etiologies, chronicity, and anatomical subtypes).

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Background: End-of-life communication skills are vital to high-quality critical care. Patients and families often report deficiencies in end-of-life communication by providers. However, formalized training is difficult to implement and study on a large scale.

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Article Synopsis
  • Seborrheic dermatitis (SD) is a common inflammatory skin condition that affects patients' quality of life, but its causes and mechanisms are not well understood, making effective diagnosis critical.
  • An online survey conducted through the Harris Poll revealed that many patients (71%) were unaware of SD prior to diagnosis and experienced significant delays (average of 3.6 years) in seeking medical attention, often due to misconceptions about the severity of their symptoms.
  • The survey also indicated that patients feel embarrassed discussing their symptoms (58%), with many preferring to see dermatology specialists, highlighting a gap in understanding between patients and healthcare providers (HCPs) regarding symptom severity and management preferences.
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Ultrasound Physics.

Emerg Med Clin North Am

November 2024

With the growing use of point-of-care ultrasound (POCUS) in various clinical settings, it is essential for users of ultrasound to have a thorough understanding of the basics of ultrasound physics, including sound wave properties, its interaction with various tissues, common artifacts, and knobology. The authors introduce and discuss these concepts in this article, with a focus on clinical implications.

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Article Synopsis
  • - The study aimed to explore how inflammation contributes to the link between obesity and cancer incidence among over 350,000 participants over an average of 8.2 years.
  • - It found that higher levels of inflammation markers like C-reactive protein and globulin increased cancer risk, while lower levels of hemoglobin, albumin, and platelets were also associated with higher risk.
  • - The results indicate that systemic inflammation is a significant factor in increased cancer risk, particularly related to obesity, and that inflammation biomarkers partly mediate this relationship.
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Objective: To explore the perspectives of young adult males with spina bifida (SB) on their fertility potential and parenthood.

Methods: Semi-structured qualitative interviews were conducted between 2/2021 and 5/2021 with men ≥18 years of age with SB on perspectives on fertility potential and parenthood. Demographic and clinical characteristics were obtained from a survey and chart review.

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Article Synopsis
  • Safe and effective long-term topical treatments for atopic dermatitis (AD) are limited, leading to low adherence rates among patients.
  • The study aimed to assess the efficacy and safety of once-daily roflumilast cream (0.15%) compared to a vehicle cream in patients aged 6 and older with mild to moderate AD across two phase 3 trials.
  • Results showed that a significantly higher percentage of patients using roflumilast achieved treatment success and a notable reduction in eczema severity compared to those using the vehicle cream.
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Antibody-oligonucleotide conjugates are a promising class of therapeutics for extrahepatic delivery of small interfering ribonucleic acids (siRNAs). These conjugates can be optimized for improved delivery and mRNA knockdown (KD) through understanding of structure-activity relationships. In this study, we systematically examined factors including antibody isotype, siRNA chemistry, linkers, conjugation chemistry, PEGylation, and drug-to-antibody ratios (DARs) for their impact on bioconjugation, pharmacokinetics (PK), siRNA delivery, and bioactivity.

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Article Synopsis
  • - Noninfectious uveitis is a major cause of vision loss and there is a need for better treatment options, prompting the investigation of filgotinib, a JAK1 inhibitor, for this condition.
  • - The HUMBOLDT trial was a phase 2 study involving 74 participants, aged 18 and older, with active noninfectious uveitis, comparing filgotinib to a placebo over 52 weeks.
  • - Results showed that 37.5% of those on filgotinib experienced treatment failure by week 24, significantly lower than the 67.6% for placebo, indicating that filgotinib may be an effective option for treating this illness.
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Purpose: Our goal was to understand the general attitudes of pediatric urologists regarding the U.S. News & World Report rankings for Best Children's Hospitals in Urology.

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Article Synopsis
  • The study investigates the effectiveness of urinalysis (UA) in diagnosing urinary tract infections (UTIs) in children with spina bifida, who are often overdiagnosed with UTIs.
  • Researchers analyzed data from 974 visits of 319 children from 2016 to 2021, finding that pyuria had the highest sensitivity, while nitrites were the most specific for diagnosing symptomatic UTIs.
  • Overall, the findings indicate that UA parameters have moderate sensitivity or specificity but show poor overall accuracy in diagnosing symptomatic UTIs in this population.
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Zebrafish are an established and widely used animal model, yet there is limited understanding of their welfare needs. Despite an increasing number of studies on zebrafish enrichment, in-tank environmental enrichment remains unpopular among researchers. This is due to perceived concerns over health/hygiene when it comes to introducing enrichment into the tank, although actual evidence for this is sparse.

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Purpose: We sought to assess associations between health-related quality of life (QOL), bladder-related QOL, bladder symptoms, and bladder catheterization route among adolescents and young adults with spina bifida.

Materials And Methods: Clinical questionnaires administered to individuals ≥ 12 years old requiring catheterization between June 2019 to March 2020 in a spina bifida center were retrospectively analyzed. Questionnaires were completed in English or Spanish independently or with caregiver assistance.

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Objective: To reveal barriers and opportunities to implement evidence for the management of pediatric kidney stone disease, we determined surgeon and institutional factors associated with preferences for the type of surgical intervention for kidney and ureteral stones.

Methods: We conducted a cross-sectional study of urologists participating in the Pediatric KIDney Stone Care Improvement Network (PKIDS) trial. Questionnaires ascertained strengths of urologists' preferences for types of surgery as well as characteristics of participating urologists and institutions.

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Background: The topical phosphodiesterase 4 inhibitor roflumilast has been studied in several dermatologic conditions.

Objective: Roflumilast foam 0.3% is being investigated as a topical treatment for seborrheic dermatitis (SD).

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Introduction/background: Enhanced Recovery After Surgery (ERAS) is a fundamental shift in perioperative care that has consistently demonstrated an improved outcome for a wide variety of surgeries in adults but has only limited evidence in the pediatric population.

Objective: We aimed to assess the success with and barriers to implementation of ERAS in a prospective, multi-center study on patients undergoing complex lower urinary tract reconstruction.

Study Design: Centers were directed to implement an ERAS protocol using a multidisciplinary team and quality improvement methodologies.

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Objective: To compare differences in bowel-specific quality of life (QOL), overall qQOL, and neurogenic bowel dysfunction (NBD) severity by bowel management program in patients with spina bifida (SB).

Methods: We performed a retrospective cross-sectional study of patients ≥12 years old at our multidisciplinary SB center who completed both a modified Peristeen NBD questionnaire (assessing bowel symptom severity and bowel-specific QOL) and the Patient-Reported Outcomes Measurement Information System Pediatric Global Health questionnaire (assessing overall QOL). Nested, multivariable models were fit for associations between outcomes and bowel management program (enemas, conservative management, and none).

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