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1.
Clin Cancer Res ; 2024 May 13.
Artículo en Inglés | MEDLINE | ID: mdl-38739109

RESUMEN

PURPOSE: Development of resistance limits the clinical benefit of BRAF and MEK inhibitors (BRAFi/MEKi) in BRAFV600 mutated melanoma. It has been shown that short-term treatment (14 days) with vorinostat was able to initiate apoptosis of the resistant tumor cells. We aimed to assess the anti-tumor activity of sequential treatment with vorinostat following BRAFi/MEKi in patients with BRAFV600 melanoma who progressed after initial response to BRAFi/MEKi. PATIENTS AND METHODS: Patients with BRAFi/MEKi resistant BRAFV600 melanoma were treated with vorinostat 360 mg QD for 14 days followed by BRAFi/MEKi. The primary endpoint was an objective response rate of progressive lesions of at least 30% according to RECIST 1.1. Secondary endpoints included progression-free survival (PFS), overall survival (OS), safety, pharmacokinetics of vorinostat and translational molecular analyses using ctDNA and tumor biopsies. RESULTS: Twenty-six patients with progressive BRAFi/MEKi resistant BRAFV600 mutated melanoma received treatment with vorinostat. Twenty-two patients were evaluable for response. The ORR was 9% (one complete response for 31.2 months and one partial response for 14.9 months. Median PFS and OS were 1.4 and 5.4 months, respectively. Common adverse events were fatigue (23%) and nausea (19%). ctDNA analysis showed emerging secondary mutations in NRAS and MEK in eight patients at time of BRAFi/MEKi resistance. Elimination of these mutations by vorinostat treatment was observed in three patients. CONCLUSIONS: Intermittent treatment with vorinostat in patients with resistant BRAFV600mutated melanoma is well tolerated. Although the primary endpoint of this study was not met, durable anti-tumor responses were observed in a minority of patients (9%).

2.
Am J Med Genet A ; : e63625, 2024 May 13.
Artículo en Inglés | MEDLINE | ID: mdl-38741340

RESUMEN

Kagami-Ogata syndrome (KOS) is a clinically recognizable syndrome in the neonatal period. It is characterized by specific skeletal anomalies and facial dysmorphisms. It is typically caused by paternal uniparental disomy of chromosome 14, while epimutations and microdeletions are less commonly reported causes. In the pediatric setting, KOS is a well delineated syndrome. However, there is a dearth of literature describing the natural history of the condition in adults. Herein, we describe a 35-year-old man, the first adult with KOS reported due to paternal uniparental disomy 14, and review reports of KOS in other affected adults. This highlights the variability in neurocognitive phenotypes, the presence of connective tissue abnormalities, and the uncertainties around long-term cancer risk.

3.
J Vet Pharmacol Ther ; 2024 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-38706125

RESUMEN

Clonazepam causes sedation and psychomotor impairment in people. Due to similarities between people and swine in response to benzodiazepines, clonazepam may represent a viable option to produce mild-to-moderate tranquillization in pigs. The objective of this study was to determine the pharmacokinetic profile of a single oral dose (0.5 mg/kg) of clonazepam in eight healthy, growing commercial cross pigs. Serial plasma samples were collected at baseline and up to 96 h after administration. Plasma concentrations were quantified using reverse-phase high-performance liquid chromatography, and compartment models were fit to time-concentration data. A one-compartment first-order model best fits the data. Maximum plasma concentration was 99.5 ng/mL, and time to maximum concentration was 3.4 h. Elimination half-life was 7.3 h, mean residence time 7.4 h, and apparent volume of distribution 5.7 L/kg. Achieved plasma concentrations exceeded those associated with psychomotor impairment in people although pharmacodynamic effects have not been investigated in pigs. A simulated oral regimen consisting of 0.35 mg/kg administered every 8 h to pigs would achieve plasma concentrations above 32 ng/mL which are shown to produce psychomotor impairment in people. Further studies to test the clinical efficacy of these dosages in commercial and miniature pigs are warranted.

4.
Sci Rep ; 14(1): 8570, 2024 04 13.
Artículo en Inglés | MEDLINE | ID: mdl-38609422

RESUMEN

Glioblastoma is one of the most common and aggressive brain tumors and has seen few improvements in patient outcomes. Inter-tumor heterogeneity between tumors of different patients as well as intra-tumor heterogeneity of cells within the same tumor challenge the development of effective drugs. MiRNAs play an essential role throughout the developing brain and regulate many key genes involved in oncogenesis, yet their role in driving many of the processes underlying tumor heterogeneity remains unclear. In this study, we highlight miRNAs from the Dlk1-Dio3 and miR-224/452 clusters which may be expressed cell autonomously and have expression that is associated with cell state genes in glioblastoma, most prominently in neural progenitor-like and mesenchymal-like states respectively. These findings implicate these miRNA clusters as potential regulators of glioblastoma intra-tumoral heterogeneity and may serve as valuable biomarkers for cell state identification.


Asunto(s)
Neoplasias Encefálicas , Glioblastoma , MicroARNs , Humanos , Encéfalo , Neoplasias Encefálicas/genética , Carcinogénesis , Glioblastoma/genética , MicroARNs/genética
5.
Mol Cancer Ther ; 2024 Apr 19.
Artículo en Inglés | MEDLINE | ID: mdl-38641404

RESUMEN

KRAS is the most frequently mutated oncogene in human cancer and facilitates uncontrolled growth through hyperactivation of the RTK/MAPK pathway. The Son of Sevenless homolog 1 (SOS1) protein functions as a guanine nucleotide exchange factor (GEF) for the RAS subfamily of small GTPases and represents a druggable target in the pathway. Using a structure-based drug discovery approach, MRTX0902 was identified as a selective and potent SOS1 inhibitor that disrupts the KRAS:SOS1 protein-protein interaction to prevent SOS1-mediated nucleotide exchange on KRAS and translates into an anti-proliferative effect in cancer cell lines with genetic alterations of the KRAS-MAPK pathway. MRTX0902 augmented the antitumor activity of the KRAS G12C inhibitor adagrasib when dosed in combination in eight out of twelve KRAS G12C-mutant human non-small cell lung cancer (NSCLC) and colorectal cancer (CRC) xenograft models. Pharmacogenomic profiling in preclinical models identified cell cycle genes and the SOS2 homolog as genetic co-dependencies and implicated tumor suppressor genes (NF1, PTEN) in resistance following combination treatment. Lastly, combined vertical inhibition of RTK/MAPK pathway signaling by MRTX0902 with inhibitors of EGFR or RAF/MEK led to greater downregulation of pathway signaling and improved antitumor responses in KRAS-MAPK pathway-mutant models. These studies demonstrate the potential clinical application of dual inhibition of SOS1 and KRAS G12C and additional SOS1 combination strategies that will aide in the understanding of SOS1 and RTK/MAPK biology in targeted cancer therapy.

6.
J Clin Invest ; 134(8)2024 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-38618951

RESUMEN

Central conducting lymphatic anomaly (CCLA) is a complex lymphatic anomaly characterized by abnormalities of the central lymphatics and may present with nonimmune fetal hydrops, chylothorax, chylous ascites, or lymphedema. CCLA has historically been difficult to diagnose and treat; however, recent advances in imaging, such as dynamic contrast magnetic resonance lymphangiography, and in genomics, such as deep sequencing and utilization of cell-free DNA, have improved diagnosis and refined both genotype and phenotype. Furthermore, in vitro and in vivo models have confirmed genetic causes of CCLA, defined the underlying pathogenesis, and facilitated personalized medicine to improve outcomes. Basic, translational, and clinical science are essential for a bedside-to-bench and back approach for CCLA.


Asunto(s)
Ácidos Nucleicos Libres de Células , Vasos Linfáticos , Genómica , Genotipo , Sistema Linfático , Vasos Linfáticos/diagnóstico por imagen
8.
Adv Healthc Mater ; : e2400508, 2024 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-38683016

RESUMEN

Salmonella, the most prevalent food-borne pathogen, poses significant medical and economic threats. Swift and accurate on-site identification and serotyping of Salmonella is crucial to curb its spread and contamination. Here, a synthetic biology cascade reaction is presented on a paper substrate using CRISPR-Cas12a and recombinase polymerase amplification (RPA), enabling the programming of a standard toehold RNA switch for a genome of choice. This approach employs just one toehold RNA switch design to differentiate between two different Salmonella serotypes, i.e., S. Typhimurium and S. Enteritidis, without the need for reengineering the toehold RNA switch. The sensor exhibits high sensitivity, capable of visually detecting as few as 100 copies of the whole genome from a model Salmonella pathogen on a paper substrate. Furthermore, this robust assay is successfully applied to detect whole genomes in contaminated milk and lettuce samples, demonstrating its potential in real sample analysis. Due to its versatility and practical features, genomes from different organisms can be detected by merely changing a single RNA element in this universal cell-free cascade reaction.

9.
Urology ; 2024 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-38677373

RESUMEN

OBJECTIVE: To improve diagnosis of interstitial cystitis (IC)/bladder pain syndrome(IC) we hereby developed an improved IC risk classification using machine learning algorithms. METHODS: A national crowdsourcing resulted in 1264 urine samples consisting of 536 IC (513 female, 21 male, 2 unspecified), and 728 age-matched controls (318 female, 402 male, 8 unspecified) with corresponding patient-reported outcome (PRO) pain and symptom scores. In addition, 296 urine samples were collected at three academic centers: 78 IC (71 female, 7 male) and 218 controls (148 female, 68 male, 2 unspecified). Urinary cytokine biomarker levels were determined using Luminex assay. A machine learning predictive classification model, termed the Interstitial Cystitis Personalized Inflammation Symptom (IC-PIS) Score, that utilizes PRO and cytokine levels, was generated and compared to a challenger model. RESULTS: The top-performing model using biomarker measurements and PROs (area under the curve [AUC]=0.87) was a support vector classifier, which scored better at predicting IC than PROs alone (AUC=0.83). While biomarkers alone (AUC=0.58) did not exhibit strong predictive performance, their combination with PROs produced an improved predictive effect. CONCLUSION: IC-PIS represents a novel classification model designed to enhance the diagnostic accuracy of IC/bladder pain syndrome by integrating PROs and urine biomarkers. The innovative approach to sample collection logistics, coupled with one of the largest crowdsourced biomarker development studies utilizing ambient shipping methods across the US, underscores the robustness and scalability of our findings.

10.
Shoulder Elbow ; 16(2): 206-213, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38655416

RESUMEN

Background: This radiological study aims to assess the prevalence of lateral elbow pathology in an asymptomatic population using 3.0T magnetic resonance imaging (MRI). Methods: Bilateral elbow MRI was undertaken in 30 asymptomatic volunteers. Exclusion criteria included elbow pain within 3 months, elbow trauma or previous diagnosis of lateral epicondylar tendinopathy. Baseline patient-reported outcome measures were recorded along with age and body mass index (BMI). Two musculoskeletal radiologists independently graded the degree of abnormality at the common extensor tendon. Results: Thirty volunteers were categorised according to age; 35-44 (n = 10), 45-54 (n = 11), and 55-65 (n = 9) with a 1:1 male-to-female ratio. Radiological evidence of tendon abnormality was found in 37% of volunteers. The proportion with abnormal findings increased with age; 35-44 (10%), 45-54 (36%), 55-65 (67%) and BMI; 18-24.9 (23%), 25-29.9 (43%), > 30 (67%). Changes were generally 'mild' or 'moderate', with a single volunteer showing 'severe' pathology. Kappa for the radiographic agreement was 0.91 (0.83-0.98). Discussion: This study has demonstrated MRI findings suggestive of pathology at the common extensor tendon to be prevalent in an asymptomatic population, increasing with age and BMI. This draws into question the diagnostic and prognostic value of MRI imaging in lateral epicondylar tendinopathy, especially in older patients.

11.
Pediatr Radiol ; 2024 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-38488925

RESUMEN

Magnetic resonance imaging (MRI) is now an indispensable diagnostic tool in medicine due to its outstanding contrast resolution and absence of radiation exposure, enabling detailed tissue characterization and three-dimensional anatomical representation. This is especially important when evaluating individuals with congenital heart disease (CHD) who frequently require cardiac implantable electrical devices (CIEDs). While MRI safety issues have previously limited its use in patients with CIEDs, new advances have called these limitations into question. However, difficulties persist in the pediatric population due to the continued lack of specific safety data both related to imaging young children and the specific CIED devices they often require. This paper discusses MRI safety considerations related to imaging patients with CIEDs, investigates pediatric-specific problems, and describes thorough methods for safe MRI access, highlighting the significance of specialized institutional guidelines.

12.
J Nurs Meas ; 2024 Mar 25.
Artículo en Inglés | MEDLINE | ID: mdl-38519076

RESUMEN

Background and Purpose: Men believe they are perceived as unfit for nursing. No scales exist to measure perceptions of men's fitness for nursing. Additionally, women have been largely excluded from this area of inquiry. This study's purpose was to develop and test the psychometric properties of the Fitness in Nursing Scale for Men. Methods: Six hundred thirty-five nurses participated. Scale development entailed concept clarification, item development, and scale testing. Results: Confirmatory factor analysis suggested a two-factor structure (F1: nursing fitness and F2: strengths of men in nursing) which demonstrated good model fit, root mean square error of approximation = .059, 90% CI (.056, .063), standardized root mean square residual = .055, comparative fit index = .932, Tucker-Lewis index = .927, and ωt = .98. Invariance held. Latent means were not significantly different for women (M = 5.90) compared with men (M = 5.92). Conclusions: Findings suggest men are perceived as fit for nursing, but results are inconsistent with men's qualitative experiences. Future research should attempt to reconcile the disagreement. Findings can inform cultural awareness strategies in the workplace and classroom.

13.
J Med Chem ; 67(6): 4936-4949, 2024 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-38477582

RESUMEN

The H1047R mutation of PIK3CA is highly prevalent in breast cancers and other solid tumors. Selectively targeting PI3KαH1047R over PI3KαWT is crucial due to the role that PI3KαWT plays in normal cellular processes, including glucose homeostasis. Currently, only one PI3KαH1047R-selective inhibitor has progressed into clinical trials, while three pan mutant (H1047R, H1047L, H1047Y, E542K, and E545K) selective PI3Kα inhibitors have also reached the clinical stage. Herein, we report the design and discovery of a series of pyridopyrimidinones that inhibit PI3KαH1047R with high selectivity over PI3KαWT, resulting in the discovery of compound 17. When dosed in the HCC1954 tumor model in mice, 17 provided tumor regressions and a clear pharmacodynamic response. X-ray cocrystal structures from several PI3Kα inhibitors were obtained, revealing three distinct binding modes within PI3KαH1047R including a previously reported cryptic pocket in the C-terminus of the kinase domain wherein we observe a ligand-induced interaction with Arg1047.


Asunto(s)
Antineoplásicos , Neoplasias , Ratones , Animales , Antineoplásicos/química , Inhibidores de las Quinasa Fosfoinosítidos-3/farmacología , Inhibidores de las Quinasa Fosfoinosítidos-3/uso terapéutico , Neoplasias/tratamiento farmacológico , Mutación , Fosfatidilinositol 3-Quinasa Clase I/uso terapéutico
14.
J Feline Med Surg ; 26(3): 1098612X241230941, 2024 03.
Artículo en Inglés | MEDLINE | ID: mdl-38511293

RESUMEN

OBJECTIVES: The main objective of this study was to compare the postoperative analgesic effects of grapiprant with those of robenacoxib in cats undergoing ovariohysterectomy (OVH). METHODS: In total, 37 female cats (age range 4 months-10 years, weighing ⩾2.5 kg) were enrolled in a prospective, randomized, masked, non-inferiority (NI) clinical trial. Cats received oral robenacoxib (1 mg/kg) or grapiprant (2 mg/kg) 2 h before OVH. Analgesia was assessed via the Feline Grimace Scale (FGS), the Glasgow Composite Measure Pain Scale-Feline (CMPS-F), von Frey monofilaments (vFFs) and pressure algometry (ALG) 2 h before treatment administration, at extubation, and 2, 4, 6, 8, 18 and 24 hours after extubation. Hydromorphone (<8 h postoperatively) or buprenorphine (>18 h postoperatively) were administered to cats with scores of ⩾5/20 on CMPS-F and/or ⩾4/10 on FGS. NI margins for CMPS-F and vFFs were set at 3 and -0.2, respectively. A mixed-effect ANOVA was used for FGS scores (P <0.05). Data are reported as mean ± SEM. RESULTS: The data from 33 cats were analyzed. The upper limit of the 95% confidence interval (CI) (0.35) was less than the NI margin of 3 for CMPS-F, and the lower limit of the 95% CI (0.055) was greater than the NI margin of -0.2 for vFFs, indicating NI of grapiprant. The FGS scores were greater than baseline at extubation for both treatments (1.65 ± 0.63; P = 0.001); however, there was no difference between treatments. There was no difference between treatments, nor treatment by time interaction, for vFFs (P <0.001). The CMPS-F scores for both treatments were higher at extubation but returned to baseline after 4 h (P <0.001). For ALG, there was no difference in treatment or treatment by time interaction. The robenacoxib group had lower pressure readings at extubation and 6 h compared with baseline. CONCLUSIONS AND RELEVANCE: These results indicate that grapiprant was non-inferior to robenacoxib for mitigating postsurgical pain in cats after OVH performed via ventral celiotomy. The impact of grapiprant for analgesia in OVH via the flank is unknown.


Asunto(s)
Analgésicos , Bencenosulfonamidas , Enfermedades de los Gatos , Difenilamina/análogos & derivados , Imidazoles , Fenilacetatos , Piridinas , Compuestos de Sulfonilurea , Gatos , Animales , Femenino , Ovariectomía/veterinaria , Estudios Prospectivos , Histerectomía/veterinaria , Dolor Postoperatorio/tratamiento farmacológico , Dolor Postoperatorio/prevención & control , Dolor Postoperatorio/veterinaria , Enfermedades de los Gatos/tratamiento farmacológico , Enfermedades de los Gatos/cirugía
15.
J Autism Dev Disord ; 2024 Mar 27.
Artículo en Inglés | MEDLINE | ID: mdl-38536637

RESUMEN

PURPOSE:  Most assessment tools used to diagnose and characterize autism spectrum disorder (ASD) were developed for in-person administration. The coronavirus disease 2019 (COVID-19) pandemic resulted in the need to adapt traditional assessment tools for online administration with only minimal evidence to support validity of such practices. METHODS: The current exploratory study compared scores from online administration of the Kaufman Brief Intelligence Test, Second Edition (KBIT-2) during the pandemic to scores derived from follow-up testing using traditional in-person administration. Participants were 47 children and adolescents (M age = 9.48 years, SD = 4.06; 68.10% male) who participated in a telehealth diagnostic evaluation for ASD that included online administration of the KBIT-2. Participants were invited to complete the KBIT-2 a second time during an in-person study visit. RESULTS: Pearson's correlation coefficients suggested acceptable to good reliability between online and in-person administration. Although most participants' online and in-person scores were within one standard deviation of each other, results suggested statistically significant differences between scores derived from the two modalities. Additionally, 19-26% of participants (depending on domain examined) had scores that differed by more than one standard deviation. Notably, all but one of these participants was under the age of 12 years. CONCLUSION: Findings suggest that online administration of the KBIT-2 is likely appropriate for older children and adolescents with ASD. However, additional research is needed to test online administration of intellectual assessments for children with ASD.

16.
J Adv Nurs ; 2024 Feb 02.
Artículo en Inglés | MEDLINE | ID: mdl-38308427

RESUMEN

AIM: To identify Attributes, Characteristics and Demonstrations of nursing practice from both nurses' and people perspectives in today's healthcare environments. A secondary aim was to identify relevant differences between female and male nurses in the context of ACDs. DESIGN: This systematic review was informed by the Joanna Briggs Institute Convergent Integrated Approach to Mixed Study Systematic Reviews. METHODS: The search included articles ranging from the years 2000 to 2023 across 10 electronic databases and multiple grey literature outlets. McMaster critical review forms and the Mixed Methods Appraisal Tool were used to appraise article quality. The Convergent Integrated Approach to Mixed Study Systematic Reviews was used to guide data synthesis. RESULTS: Twenty articles were included in this review, 13 qualitative, five quantitative and two mixed-methods studies. Three themes emerged, including knowledge, practice skills and interpersonal relationships. Differences in Attributes, Characteristics and Demonstrations of professional practice between women and men in nursing were also explored. CONCLUSION: Findings suggest that evolving healthcare environments challenge nurses to remain focused on patient-centred and compassionate care. The review also supports nurses caring in a manner that empowers people, increases well-being, and reduces suffering. IMPACT: Identified characteristics and attributes of nursing practice, including emphasis on continuous learning, interpersonal relationships and compassion, have a profound impact on nursing. Nurses should remain adaptable, compassionate and patient-focused in an ever-evolving healthcare environment. These foundational care principles are necessary for improving patient outcomes, enhancing trust between people and healthcare providers, and increasing inclusivity and diversity in the nursing workforce. WIDER GLOBAL COMMUNITY: Nurses worldwide should strive to embody these attributes to provide high-quality, patient-centred care in an inclusive environment in today's demanding healthcare environment. Gender-specific differences in the perception and expression of professional Attributes, Characteristics and Demonstrations can inform inclusion and diversity efforts in the workplace. REPORTING METHOD: This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines. PATIENT OR PUBLIC CONTRIBUTION: No Patient or Public Contribution.

17.
ACS Omega ; 9(6): 7262-7268, 2024 Feb 13.
Artículo en Inglés | MEDLINE | ID: mdl-38371851

RESUMEN

Amorphous transparent conducting oxides (a-TCOs) have seen substantial interest in recent years due to the significant benefits that they can bring to transparent electronic devices. One such material of promise is amorphous ZnxSn1-xOy (a-ZTO). a-ZTO possesses many attractive properties for a TCO such as high transparency in the visible range, tunable charge carrier concentration, electron mobility, and only being composed of common and abundant elements. In this work, we employ a combination of UV-vis spectrophotometry, X-ray photoemission spectroscopy, and in situ scanning tunneling spectroscopy to investigate a 0.33 eV blue shift in the optical bandgap of a-ZTO, which we conclude to be due to quantum confinement effects.

18.
Science ; 383(6685): 860-864, 2024 Feb 23.
Artículo en Inglés | MEDLINE | ID: mdl-38386743

RESUMEN

Forestation is widely proposed for carbon dioxide (CO2) removal, but its impact on climate through changes to atmospheric composition and surface albedo remains relatively unexplored. We assessed these responses using two Earth system models by comparing a scenario with extensive global forest expansion in suitable regions to other plausible futures. We found that forestation increased aerosol scattering and the greenhouse gases methane and ozone following increased biogenic organic emissions. Additionally, forestation decreased surface albedo, which yielded a positive radiative forcing (i.e., warming). This offset up to a third of the negative forcing from the additional CO2 removal under a 4°C warming scenario. However, when forestation was pursued alongside other strategies that achieve the 2°C Paris Agreement target, the offsetting positive forcing was smaller, highlighting the urgency for simultaneous emission reductions.

19.
J Org Chem ; 89(6): 3875-3882, 2024 03 15.
Artículo en Inglés | MEDLINE | ID: mdl-38422508

RESUMEN

Chiral amine synthesis remains a significant challenge in accelerating the design cycle of drug discovery programs. A zirconium hydride, due to its high oxophilicity and lower reactivity, gave highly chemo- and stereoselective reductions of sulfinyl ketimines. The development of this zirconocene-mediated reduction helped to accelerate our drug discovery efforts and is applicable to several motifs commonly used in medicinal chemistry. Computational investigation supported a cyclic half-chair transition state to rationalize the high selectivity in benzyl systems.


Asunto(s)
Compuestos Organometálicos , Circonio , Química Farmacéutica , Aminas
20.
Mil Med ; 2024 Feb 06.
Artículo en Inglés | MEDLINE | ID: mdl-38330163

RESUMEN

INTRODUCTION: Musculoskeletal injuries affect nearly a million service members annually within the DoD, ultimately costing the U.S. Military half a billion dollars in direct patient costs and a significant loss to fleet readiness as many members are assigned days on limited duty (LIMDU) until they are deemed medically fit to return to duty (RTD). The new approach implemented by Navy Medicine in 2022, called "condition-based LIMDU," aims to drastically impact the time in which Sailors and Marines spend under a provider's care by assigning LIMDU days based on a standardized set of guidelines. This study provides a quantitative analysis on LIMDU duration, before and after implementation of the new condition-based LIMDU paradigm, to increase the understanding on the effectiveness and impact to fleet readiness and to assess the accuracy of suggested patient outcome timelines. MATERIALS AND METHODS: De-identified and aggregated data were obtained from the Naval Medical Forces Atlantic's (NMFL) LIMDU Sailor and Marine Readiness Tracker System (SMART) program for all active duty military patients with ICD-10 code for musculoskeletal conditions. Only closed LIMDU cases in which active duty patients were given a final status of RTD were included. This study analyzed top musculoskeletal ICD-10 codes, optimum period (weeks), maximum period (weeks), and average days on LIMDU assigned at NMFL centers (medical and non-medical) for fiscal years 2021 (FY21) and 2022 (FY22). As well as descriptive statistics, t-test analysis was used to test if there was a difference between FY21 and FY22 and at what point the difference was no longer significant. Critical value method was then used to compare the top five most common musculoskeletal injuries to determine the accuracy of recommended LIMDU days to actual average assigned LIMDU per injury type. A color-coded compliance chart was created based on the results. RESULTS: The results showed that for RTD population, the implementation of condition-based LIMDU significantly decreased average days assigned on LIMDU by 33%. In fact, there is a 35-day (5-week) difference before we can confidently say that the difference between FY21 and FY22 is no longer statistically significant. This significant decrease in LIMDU days, before and after implementation, is a trend consistent at both medical and non-medical NMFL centers; however, medical centers reported significantly more assigned LIMDU days for both years. The five most common injuries of FY21 and FY22 were low back pain, pain in shoulder, pain in hip, pain in knee, and pain in ankle. Before implementation, all five of these injury types far exceeded the recommended amount of LIMDU days. With the new condition-based LIMDU paradigm, the average assigned LIMDU days for pain in hip, pain in knee, and pain in ankle were all found to be in compliance with the recommended LIMDU days within a 99% confidence level. CONCLUSIONS: The new condition-based LIMDU paradigm is successful in its aim to improve fleet readiness by returning Sailors and Marines to full duty status significantly faster. Regular assessment of ICD-10 diagnosis codes and update to recommended LIMDU assignment timelines should be conducted to maximize the effectiveness and accuracy for all medical conditions.

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