Kelsey Karnik

Dr. Kelsey Karnik

orcid

Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 October 2025 in Clinical and Translational Gastroenterology
Verified
Journal Article
Open access
RHRachel L Hill
Rachel L Hill
DYDhiraj Yadav
Dhiraj Yadav
PHPhil A. Hart
Phil A. Hart
DWDavid C. Whitcomb
David C. Whitcomb
KMKristen J. McQuerry
Kristen J. McQuerry
MRMadhumathi Rao
Madhumathi Rao
INTRODUCTION: Pancreatitis-associated osteopathy is a clinically significant but mechanistically underexplored complication of pancreatic disease. We aimed to characterize stage-specific alterations in bone remodeling biomarkers across the spectrum of disease: recurrent acute pancreatitis (RAP) and chronic pancreatitis (CP). METHODS: In a cross-sectional analysis of North American Pancreatitis Study 2 participants, we measured serum mechanistic (sclerostin, dickkopf-1, receptor activator of nuclear factor κβ ligand, and osteoprotegerin), hormonal (fibroblast growth factor 23, insulin, and leptin), and modulatory (osteopontin, oncostatin, and osteoactivin) markers in controls (n = 30), RAP (n = 40), and CP (n = 40) using a multiplex assay. Group differences were assessed with ANOVA, Fisher exact test, and Kruskal-Wallis; multivariable regression identified predictors of biomarker variation. RESULTS: Eight of 10 biomarkers differed significantly among groups. Sclerostin, dickkopf-1, receptor activator of nuclear factor κβ ligand, and osteoprotegerin were elevated in RAP and CP vs controls, with the highest values in CP. The RANKL/OPG ratio was greatest in CP. Fibroblast growth factor 23 was increased in RAP, while insulin was reduced in CP. Osteopontin and oncostatin were elevated in pancreatitis groups, with osteopontin increasing progressively from control to RAP to CP. Several bone biomarker patterns varied by sex, tobacco, and alcohol use. Stepwise regression identified several significant predictors. DISCUSSION: These findings represent the most comprehensive bone metabolism biomarker profiling in pancreatitis to date, revealing stage-specific dysregulation of bone remodeling. Findings suggest a shift toward increased bone resorption and impaired formation with disease progression. Larger longitudinal studies are needed for marker validation, to clarify mechanisms, and guide targeted interventions to reduce bone loss and fracture risk in this high-risk population.

7 August 2025 in PLOS ONE
Verified
Journal Article
Open access
PDF file
HAHarshit Arora
Harshit Arora
HDHassan Darabi
Hassan Darabi
NTNathaniel Toop
Nathaniel Toop
AMAmy Minnema
Amy Minnema
ZAZahraa Al-Sharshahi
Zahraa Al-Sharshahi
HFH. Francis Farhadi
H. Francis Farhadi
Intradural spinal cord compression impairs perfusion pressure and is putatively rate-limiting for recovery after traumatic spinal cord injury (tSCI). After cervical tSCI, even minimally improved tissue preservation may help promote neurological recovery. To assess the nature and extent of spinal cord swelling and compression post-acute cervical tSCI, we evaluated several baseline MRI parameters including BASIC score, intramedullary lesion (IML) length, maximal canal compromise (MCC), maximal spinal cord compression (MSCC), extent of cord compression (ECC), maximal swollen anteroposterior diameter adjacent to injury site (Dmax), and maximal cord swelling (MCS) in 169 consecutive patients across 2 centers. In patients with either primarily intradural or combined (MSCC ≤5% or >5%, respectively) cord compression, we examined the predictive value of clinical and imaging admission parameters on American Spinal Injury Association Impairment Scale (AIS) severity and conversion up to 1-year follow-up. 37 (21.9%) patients presented with primarily intradural while 132 (78.1%) had combined cord compression. MSCC, MCS, and Dmax values differed significantly between the two groups (p < 0.0001, < 0.01 and < 0.001, respectively). MSCC was associated with age, MCC and MCS at baseline, while MCS was associated with age, MSCC and Dmax, on multivariable analysis. Logistic regression analysis of areas under receiver operating characteristic curve (AUROC) confirmed ECC (AUC 0.678) and MCS (AUC 0.922) as good and excellent predictors, respectively of AIS-conversion at 1-year for intradural compression participants. Additionally, MCS was significantly more accurate in predicting AIS-conversion in intradural group and the probability of AIS-conversion significantly decreased with each 1% increase in MCS (p = 0.003; OR 0.949), for both compression subtypes. In conclusion, baseline measures of cord swelling predict AIS-conversion likelihood up to 1-year. The deleterious effects of intradural cord compression, either isolated or presenting with extradural compression, may benefit from supplemental decompression strategies in addition to current standard-of-care.

7 August 2025 in Antimicrobial Stewardship & Healthcare Epidemiology
Verified
Journal Article
Open access
HMHayato Mitaka
Hayato Mitaka
KMKristen McQuerry
Kristen McQuerry
KKKelsey Karnik
Kelsey Karnik
Alexandre MarraAlexandre Marra
Alexandre Marra
TNToshio Naito
Toshio Naito
TKTakaaki Kobayashi
Takaaki Kobayashi
Background: Fournier gangrene (FG) is a necrotizing soft tissue infection (NSTI) of the perineum. Recent retrospective studies from quaternary centers suggest improved outcomes and a potentially less aggressive clinical course for FG than non-perineal NSTIs. However, comprehensive nationwide data remain limited. Methods: This retrospective cohort study analyzed the National Inpatient Sample (2016–2020) to compare outcomes between FG and non-perineal NSTIs. Adult patients undergoing surgical debridement with a diagnosis of FG or NSTI were identified using ICD-10 codes. Outcomes included in-hospital mortality, length of stay (LOS), hospital costs, and home discharge rates. Multivariable regression analyses adjusted for patient demographics, comorbidities, and hospital characteristics. Results: A total of 5,007 FG and 24,782 non-perineal NSTI patients were identified. Crude in-hospital mortality rates were 5.8% for FG and 5.4% for non-perineal NSTIs, with stable trends observed over five years. After adjustment, no significant difference in mortality was observed (adjusted odds ratio [aOR]: 1.04; 95% CI: 0.90–1.20). However, FG was associated with longer LOS (adjusted mean difference: 1.99 days; 95% CI: 1.53–2.46) and higher hospital costs ($37,809 higher; 95% CI: $29,540–$46,077). Home discharge rates were similar between groups (aOR: 0.97; 95% CI: 0.89–1.05). Discussion: Despite similar mortality rates, FG hospitalizations were associated with increased LOS and higher costs compared to non-perineal NSTIs. These findings may suggest potential nationwide disparities in FG care quality, particularly outside specialized referral centers. Further research is needed to understand if standardized care pathways tailored to FG may optimize management and reduce resource utilization.

Verified
Journal Article
Open access
PDF file
PLPreston Leader
Preston Leader
KKKelsey Karnik
Kelsey Karnik
AMAnthony A Mangino
Anthony A Mangino
CBClayton Bobo
Clayton Bobo
TGThomas Gal
Thomas Gal
Background: Naso-orbital-ethmoid (NOE) fractures represent complex midface injuries that challenge aesthetic and functional reconstruction. This study evaluates the efficacy of techniques restoring intercanthal distance following operative repair of NOE fractures. Methods: A retrospective case series was conducted of adults undergoing NOE fracture repair between 2010 and 2022. CPT codes were used to identify patients, with inclusion based on radiographic confirmation of NOE fractures. Demographic data, fracture classification, operative techniques, and pre- and post-operative CT measurements of intercanthal distance were analyzed by fracture type and type of repair. Results: 191 patients were identified, mostly male (80%), with Type I fractures being most common (66%). Intercanthal wiring was used in 14% of cases, most frequently for Type II and III fractures. Of the 100 patients with post-operative comparison imaging, the median intercanthal distance improved from 34 mm to 31 mm. Intercanthal wiring yielded greater median distance correction. All patients achieved restoration of intercanthal distance within normal limits regardless of repair technique. Conclusions: Operative repair of NOE fractures using either plating or intercanthal wiring effectively restores normal intercanthal distance. While intercanthal wiring remains valuable in severe fractures, it may not be universally necessary. Further study is needed to refine the role of these repair techniques.