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1.
Health Promot J Austr ; 33(1): 51-56, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33864306

RESUMO

ISSUE ADDRESSED: Physical activity tracking devices have potential to improve public health, but their data needs to be reliable. No study has compared movement data between the Fitbit Zip, Apple iPhone Health app and physical activity records in a community setting over 10 days. METHODS: University students aged 18+ years wore both a Fitbit Zip and an iPhone at/near their right waist and completed a modified Bouchard Activity Record (BAR) for 10 days in a free-living setting. Comparisons were made between the Fitbit Zip and iPhone for the number of steps and the distance travelled and between the Fitbit Zip and BAR for the minutes of activity in three different intensities. RESULTS: Eighteen students provided sufficient data for inclusion. There were strong correlations between steps per day (r = .87) and distance travelled (r = .88) between the Fitbit Zips and iPhones. However, the Fitbit Zip measured significantly more steps per day (mean 8437 vs 7303; P ≤ .001) and greater distances (mean 5.9 vs 4.9; P ≤ .001) than the iPhone. Correlations between the Fitbit Zips and the BARs were moderate for minutes of total (r = .51) and light (r = .40) activity and weak for moderate/fairly active (r = .20) and vigorous/very active (r = .25). CONCLUSIONS: There were strong correlations between the physical activity data measured by Fitbit Zips and iPhones, but the iPhone Health app significantly underestimated the number of steps per day taken and the distance travelled when compared to the Fitbit Zip. SO WHAT?: Understanding the comparability of accelerometer devices provides useful information for future pragmatic physical activity measurement.


Assuntos
Malus , Aplicativos Móveis , Acelerometria , Exercício Físico , Humanos , Monitorização Ambulatorial , Reprodutibilidade dos Testes
2.
Educ Inf Technol (Dordr) ; 27(5): 6317-6332, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35013666

RESUMO

In the present study, students' perceptions of their self-directed and collaborative learning with and without technology were examined in ICT-supported middle school classrooms. Three hundred and twenty middle school students from eight schools across Alberta, Canada participated in the study by completing a questionnaire. Descriptive statistics, independent sample t-test, one-way ANOVA and correlational analysis were used to analyse the questionnaire responses. Descriptive statistics revealed that middle school students perceive themselves as readily engaging in self-directed and collaborative learning within their classrooms. Students' self-directed learning with and without technology was significantly related to the instructional quality in their classroom with lower instructional quality classrooms having a significant small effect on self-directed learning. Gender was also found to have a small effect, with girls more readily engaging in self-directed learning, although this difference was not sustained when using technology. When learning with technology, while indicating that they engage in self-directed learning within their classrooms, students reported less engagement in collaborative activities with their peers, particularly in earlier middle school grades. Students may benefit from additional support to engage in collaborative activities while using technology. Likewise, teachers may benefit from professional development to support their facilitation of self-directed learning and collaborative learning as well as implementation of technology within the classroom.

3.
Nurs Educ Perspect ; 42(6): E154-E155, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32649477

RESUMO

ABSTRACT: The Escape Room, an innovative teaching strategy, can be customized to various nursing scenarios. Student teams complete puzzles and tasks to reach designated goals and objectives within a limited time frame. Escape Rooms were designed as a clinical make-up day for 10 first-year, second-semester associate degree nursing students. Using activity theory to create a constructivist learning environment, scenarios were designed to focus on diabetic ketoacidosis and safety/environmental factors associated with aspiration pneumonia and wound dehiscence. This student sample evaluated the Escape Room experiences as an effective method for content retention and clinical thinking/judgment.


Assuntos
Estudantes de Enfermagem , Criatividade , Humanos , Julgamento , Aprendizagem , Pensamento
4.
Am J Occup Ther ; 70(6): 7006220040p1-7006220040p9, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27767943

RESUMO

Engagement in meaningful activities is essential to development and is often reduced in children with autism spectrum disorder (ASD) who have limited engagement in activities or relationships. A multiple-baseline design was used with 7 children with ASD ages 4-8 yr to assess the effect of including a horse in occupational therapy intervention on task engagement. The children showed improvements in engagement. Including horses in occupational therapy sessions may be a valuable addition to conventional treatments to increase task engagement of children with ASD. Factors related to the environment, therapeutic strategies, and individual participation need to be considered in understanding why this intervention may be effective and developing a theoretical basis for implementation.


Assuntos
Transtorno do Espectro Autista/reabilitação , Terapia Assistida por Cavalos/métodos , Terapia Ocupacional/métodos , Animais , Criança , Pré-Escolar , Meio Ambiente , Feminino , Cavalos , Humanos , Masculino
5.
Pediatr Phys Ther ; 28(2): 224-30, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26901535

RESUMO

PURPOSE: To study the effectiveness of cognitive orientation to daily occupational performance (CO-OP) to teach motor skills to youth with intellectual disabilities. METHODS: Six youth aged 12 to 19 years participated in this study. A multiple baseline design was employed to evaluate distance and time cycled, and a pre-post-follow-up design was used to evaluate the effect on cycling skills mastered, cycling performance, and parent satisfaction. RESULTS: At follow-up, 5 of the 6 youth rode their 2-wheeled bicycles over 100 m in their communities (range, 103-1400 m) and demonstrated improved cycling skills and parent satisfaction. CONCLUSIONS: The skills acquired by youth with Down syndrome using a CO-OP approach exceeded what has been reported in the literature. CO-OP offers a promising alternative to existing approaches for teaching 2-wheeled cycling to youth with Down syndrome.


Assuntos
Ciclismo , Síndrome de Down/reabilitação , Transtornos das Habilidades Motoras/reabilitação , Modalidades de Fisioterapia , Adolescente , Criança , Feminino , Humanos , Masculino
6.
Nurs Older People ; 28(3): 33-7, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27029991

RESUMO

There has been little research that explores the interaction between community pharmacists and community nurses and how this interaction could benefit people affected by dementia. Using information taken from a larger study, this article presents the views of community pharmacists and one community nurse on how their communication, information sharing and team integration may improve care for this patient group. The community pharmacists reported positive attitudes to supporting people affected by dementia, but they highlighted barriers to integrated team working. In contrast, the community nurse conveyed the belief that the community pharmacist was an integrated member of the community health team. Community pharmacists and community nurses are keen to interact with each other to support people affected by dementia, but this interaction stops short of collaborative, integrated team working. Further research is needed to address this issue.


Assuntos
Atitude do Pessoal de Saúde , Demência/enfermagem , Enfermeiras e Enfermeiros , Equipe de Assistência ao Paciente , Farmacêuticos , Serviços de Saúde Comunitária , Serviços Comunitários de Farmácia , Comportamento Cooperativo , Demência/tratamento farmacológico , Humanos , Papel Profissional
7.
Crit Care Explor ; 6(3): e1056, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38415020

RESUMO

IMPORTANCE: Sepsis is a leading cause of morbidity and mortality in the United States and disparate outcomes exist between racial/ethnic groups despite improvements in sepsis management. These observed differences are often related to social determinants of health (SDoH). Little is known about the role of SDoH on outcomes in pediatric sepsis. OBJECTIVE: This study examined the differences in care delivery and outcomes in children with severe sepsis based on race/ethnicity and neighborhood context (as measured by the social vulnerability index). DESIGN SETTING AND PARTICIPANTS: This retrospective, cross-sectional study was completed in a quaternary care children's hospital. Patients 18 years old or younger who were admitted between May 1, 2018, and February 28, 2022, met the improving pediatric sepsis outcomes (IPSO) collaborative definition for severe sepsis. Composite measures of social vulnerability, care delivery, and clinical outcomes were stratified by race/ethnicity. MAIN OUTCOMES AND MEASURES: The primary outcome of interest was admission to the PICU. Secondary outcomes were sepsis recognition and early goal-directed therapy (EGDT). RESULTS: A total of 967 children met the criteria for IPSO-defined severe sepsis, of whom 53.4% were White/non-Hispanic. Nearly half of the cohort (48.7%) required PICU admission. There was no difference in illness severity at PICU admission by race (1.01 vs. 1.1, p = 0.18). Non-White race/Hispanic ethnicity was independently associated with PICU admission (odds ratio [OR] 1.35 [1.01-1.8], p = 0.04). Although social vulnerability was not independently associated with PICU admission (OR 0.95 [0.59-1.53], p = 0.83), non-White children were significantly more likely to reside in vulnerable neighborhoods (0.66 vs. 0.38, p < 0.001). Non-White race was associated with lower sepsis recognition (87.8% vs. 93.6%, p = 0.002) and less EGDT compliance (35.7% vs. 42.8%, p = 0.024). CONCLUSIONS AND RELEVANCE: Non-White race/ethnicity was independently associated with PICU admission. Differences in care delivery were also identified. Prospective studies are needed to further investigate these findings.

8.
J Clin Transl Sci ; 8(1): e63, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38655451

RESUMO

Background: Impaired motor and cognitive function can make travel cumbersome for People with Parkinson's disease (PwPD). Over 50% of PwPD cared for at the University of Arkansas for Medical Sciences (UAMS) Movement Disorders Clinic reside over 30 miles from Little Rock. Improving access to clinical care for PwPD is needed. Objective: To explore the feasibility of remote clinic-to-clinic telehealth research visits for evaluation of multi-modal function in PwPD. Methods: PwPD residing within 30 miles of a UAMS Regional health center were enrolled and clinic-to-clinic telehealth visits were performed. Motor and non-motor disease assessments were administered and quantified. Results were compared to participants who performed at-home telehealth visits using the same protocols during the height of the COVID pandemic. Results: Compared to the at-home telehealth visit group (n = 50), the participants from regional centers (n = 13) had similar age and disease duration, but greater disease severity with higher total Unified Parkinson's disease rating scale scores (Z = -2.218, p = 0.027) and lower Montreal Cognitive Assessment scores (Z = -3.350, p < 0.001). Regional center participants had lower incomes (Pearson's chi = 21.3, p < 0.001), higher costs to attend visits (Pearson's chi = 16.1, p = 0.003), and lived in more socioeconomically disadvantaged neighborhoods (Z = -3.120, p = 0.002). Prior research participation was lower in the regional center group (Pearson's chi = 4.5, p = 0.034) but both groups indicated interest in future research participation. Conclusions: Regional center research visits in PwPD in medically underserved areas are feasible and could help improve access to care and research participation in these traditionally underrepresented populations.

9.
Am J Hematol ; 88(9): 754-7, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23749720

RESUMO

Plerixafor, a recently approved peripheral blood progenitor cell mobilizing agent, is often added to granulocyte-colony stimulating factor (G-CSF) to mobilize peripheral blood progenitor cells in patients with lymphoma or myeloma who cannot mobilize enough CD34+ cells with G-CSF alone to undergo autologous stem cell transplantation. However, data are lacking regarding the feasibility and efficacy of just-in-time plerixafor in combination with chemotherapy and G-CSF. We reviewed the peripheral blood stem cell collection data of 38 consecutive patients with lymphoma (Hodgkin's and non-Hodgkin's) and multiple myeloma who underwent chemomobilization and high-dose G-CSF and just-in-time plerixafor to evaluate the efficacy of this treatment combination. All patients with multiple myeloma and all but one patient with lymphoma collected the minimum required number of CD34+ cells to proceed with autologous stem cell transplantation (>2 × 10(6) /kg of body weight). The median CD34+ cell dose collected in patients with non-Hodgkin lymphoma was 4.93 × 10(6) /kg of body weight. The median CD34+ cell dose collected for patients with multiple myeloma was 8.81 × 10(6) /kg of body weight. Plerixafor was well tolerated; no grade 2 or higher non-hematologic toxic effects were observed.


Assuntos
Fator Estimulador de Colônias de Granulócitos/uso terapêutico , Mobilização de Células-Tronco Hematopoéticas/métodos , Transplante de Células-Tronco Hematopoéticas , Compostos Heterocíclicos/uso terapêutico , Adulto , Idoso , Antígenos CD34/imunologia , Benzilaminas , Contagem de Células , Ciclamos , Quimioterapia Combinada , Feminino , Fator Estimulador de Colônias de Granulócitos/farmacologia , Compostos Heterocíclicos/farmacologia , Doença de Hodgkin/imunologia , Doença de Hodgkin/terapia , Humanos , Linfoma não Hodgkin/imunologia , Linfoma não Hodgkin/terapia , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/imunologia , Mieloma Múltiplo/terapia , Fatores de Tempo , Transplante Autólogo , Resultado do Tratamento
10.
Artigo em Inglês | MEDLINE | ID: mdl-37416339

RESUMO

The Australian paralysis tick Ixodes holocyclus continues to be a serious threat to companion animals along Australia's east coast. The tick produces a potent neurotoxin which causes a rapidly ascending flaccid paralysis, which if left untreated, can result in the death of the animal. There is currently only a limited number of products registered in Australia for the treatment and control of paralysis ticks in cats. Felpreva® is an effective spot-on combination containing emodepside, praziquantel and tigolaner. To investigate the therapeutic and long-term persistent efficacy of Felpreva® (2.04% w/v emodepside, 8.14% w/v praziquantel and 9.79% w/v tigolaner) against experimental infestation with I. holocyclus in cats, two studies were undertaken. Fifty cats were included in the studies on study Day -17. These cats were immunized against paralysis tick holocyclotoxin prior to the study commencing. Immunity to holocyclotoxin was confirmed with a tick carrying capacity (TCC) test conducted prior to treatment. Cats were treated once on Day 0. Group 1 cats were treated with the placebo formulation and Group 2 cats were treated with Felpreva®. Cats were infested on Days -14 (tick carrying capacity test), 0, 28, 56, 70, 84 and 91 (weeks 4, 8, 10, 12 and 13). Ticks were counted on cats 24 h, 48 h and 72 â€‹h post-treatment and infestation, except during the tick carrying capacity test when they were counted approximately 72 â€‹h post-infestation only. The 24-h and 48-h assessments were conducted without removing the ticks. The ticks were assessed, removed and discarded at the 72-h assessment time-points. Significant differences in total live tick counts at ∼24 h, ∼48 h and ∼72 â€‹h post-infestation were observed between the treatment and control group. Differences were significant (P â€‹< â€‹0.05 to â€‹< â€‹0.001) in all instances. Treatment efficacies of 98.1-100% were observed ∼72 â€‹h post-infestation through to 13 weeks (94 days) post-treatment. These results show that a single application of Felpreva® provides effective treatment and control against induced infestation with paralysis ticks for 13 weeks.

11.
J Clin Transl Res ; 9(2): 115-122, 2023 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-37179792

RESUMO

Background: To address the high prevalence of health disparities and lack of research opportunities among rural and minority communities, the University of Arkansas for Medical Sciences (UAMS) developed the Rural Research Network in January 2020. Aim: The aim of this report is to describe our process and progress in developing a rural research network. The Rural Research Network provides a platform to expand research participation opportunities to rural Arkansans, many of whom are older adults, low-income individuals, and underrepresented minority populations. Methods: The Rural Research Network leverages existing UAMS Regional Programs family medicine residency clinics within an academic medical center. Results: Since the inception of the Rural Research Network, research infrastructure and processes have been built within the regional sites. Twelve diverse studies have been implemented with recruitment and data collection from 9248 participants, and 32 manuscripts have been published with residents and faculty from the regional sites. Most studies were able to recruit Black/African American participants at or above a representative sample. Conclusions: As the Rural Research Network matures, the types of research will expand in parallel with the health priorities of Arkansas. Relevance to Patients: The Rural Research Network demonstrates how Cancer Institutes and sites funded by a Clinical and Translational Science Award can collaborate to expand research capacity and increase opportunities for research among rural and minority communities.

12.
Adv Exp Med Biol ; 724: 51-60, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22411233

RESUMO

Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder affecting in US 1 in 110 individuals.(1) As increasingly younger children are receiving ASD diagnoses, many pediatricians are now faced with the unique needs of parents and other caregivers of newly diagnosed toddlers and young children. This chapter provides an overview of ASD designed to offer information and resources to pediatricians that could, in turn, be provided to families of children newly diagnosed with ASD.


Assuntos
Transtornos Globais do Desenvolvimento Infantil , Saúde da Família , Pediatria , Criança , Transtornos Globais do Desenvolvimento Infantil/diagnóstico , Transtornos Globais do Desenvolvimento Infantil/epidemiologia , Transtornos Globais do Desenvolvimento Infantil/terapia , Pré-Escolar , Humanos
14.
Q J Exp Psychol (Hove) ; 75(6): 1056-1066, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34623205

RESUMO

Research suggests that aerobic exercise (i.e., exercise aiming to improve cardiovascular fitness) promotes cognition, but the impact on memory specifically, is unclear. There is some evidence to suggest that as little as one session of post-learning exercise benefits memory consolidation. Furthermore, memory may be particularly facilitated by exercise when the individual is emotionally aroused while encoding stimuli. The current study tested whether exercise after exposure to neutral and emotional images improved memory consolidation of the items among university students. Ninety-nine students were randomly instructed to either exercise or not exercise after viewing a set of images that were positive, neutral, and negative in valence, and they were later tested on their memory. Although emotional images were remembered better than non-emotional images, the results suggested that exercise did not influence this effect or enhance consolidation of the items overall. Explanations and implications for these findings are discussed.


Assuntos
Nível de Alerta , Consolidação da Memória , Emoções , Humanos , Rememoração Mental , Reconhecimento Psicológico
15.
Environ Adv ; 8: None, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35782592

RESUMO

Severe nuclear accidents may lead to a release of radioactivity, including radioactive iodine, into the environment. The thyroid gland in the human body needs natural or stable iodine to function properly and this iodine is normally absorbed in small quantities from food. Following a release of radioactive iodine from a nuclear or radiological accident, the body will absorb and accumulate the radioactive iodine in the thyroid gland. This increases the risk of thyroid cancer, especially in children. Since the thyroid gland cannot distinguish between radioactive and stable iodine, stable iodine can be taken to prevent the absorption of radioiodine by the thyroid in the event of a nuclear emergency. This is referred to as Iodine Thyroid Blocking (ITB). In 2017, the World Health Organization published revised guidelines entitled 'Iodine Thyroid Blocking: guidelines for use in planning for and responding to radiological and nuclear emergencies'. The purpose of these guidelines is to support Member States in planning for and implementation of ITB before and during a radiation emergency. To enable the monitoring and measurement of the impact of a specific recommended intervention, a baseline should be established against which the impact will be measured over a certain period of time. With that in mind, a global WHO survey of national policies on ITB was carried out in 2016-2017. Here, an overview of some core findings of this survey is provided.

16.
J Autism Dev Disord ; 52(12): 5322-5341, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35022943

RESUMO

A randomized feasibility trial of a parent coaching (PC) intervention was conducted across 16 community agencies in a Canadian province. Parents of toddlers with suspected autism were assigned to either a PC group (n = 24) or an enhanced community treatment (ECT) group (n = 25). PC participants received 24 weeks of coaching support from community service providers trained in the project. Children in both groups also received available community services and supplementary materials. PC children made significantly greater gains in word understanding and PC parents had significantly higher quality of life, satisfaction, and self-efficacy scores. Results are discussed in terms of the challenges of conducting feasibility studies in community settings and the lessons learned in the project.


Assuntos
Transtorno do Espectro Autista , Transtorno Autístico , Pré-Escolar , Humanos , Transtorno do Espectro Autista/terapia , Transtorno Autístico/diagnóstico , Transtorno Autístico/terapia , Canadá , Intervenção Educacional Precoce/métodos , Estudos de Viabilidade , Pais , Qualidade de Vida
17.
J Autism Dev Disord ; 52(11): 4931-4948, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34796421

RESUMO

This study evaluated the fidelity and effectiveness of a parent coach training program for toddlers at risk for autism spectrum disorder and identified factors required for successful training implementation under real-world conditions. Training addressed four tiers of clinical competence and was delivered to early intervention providers across 23 partner agencies in a large Canadian province. Results indicated that mean trainee fidelity scores were within the range reported in previous community-based training studies but there was considerable variability across trainees. Implementation facilitators included agency learning climate, leadership support, and trainee readiness for change. Implementation barriers included time/caseload demands and challenges related to technology learning and infrastructure. Results have implications for parent coach training in community settings.


Assuntos
Transtorno do Espectro Autista , Transtorno Autístico , Transtorno do Espectro Autista/diagnóstico , Transtorno do Espectro Autista/terapia , Canadá , Intervenção Educacional Precoce/métodos , Humanos , Pais
18.
Drug Metab Dispos ; 39(2): 275-82, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21075975

RESUMO

To support drug development and registration, Caco-2 cell monolayer assays have previously been set up and validated to determine whether candidate drugs are substrates or inhibitors of human P-glycoprotein (P-gp). In this study, the drug-drug interaction (DDI) potential of N-(1-{(3R)-3-(3,5-difluorophenyl)-3-[4-methanesulfonylphenyl]propyl}piperidin-4-yl)-N-ethyl-2-[4-methanesulfonylphenyl]acetamide (AZD5672) was assessed accordingly, and a subsequent clinical digoxin interaction study was performed. AZD5672 (1-500 µM) demonstrated concentration-dependent efflux across cell monolayers, which was abolished in the presence of ketoconazole and quinidine, identifying AZD5672 as a P-gp substrate. In addition, P-gp-mediated digoxin transport was inhibited in a concentration-dependent manner by AZD5672 (IC(50) = 32 µM). Assessment of the calculated theoretical gastrointestinal inhibitor concentration ([I(2)]) and predicted steady-state maximum total plasma inhibitor concentration ([I(1)]) indicated the potential for a DDI at the intestinal but not the systemic level after the predicted therapeutic dose of AZD5672 (100 mg). A clinical study was performed and the plasma pharmacokinetics [observed maximum plasma drug concentration (C(max)) and area under the plasma concentration versus time curve from 0 to 72 h postdose (AUC(0-72 h))] of orally dosed digoxin (0.5 mg) were found to be unaffected by coadministration of AZD5672 (50 mg) at steady state. In contrast, a 150-mg dose of AZD5672 significantly increased digoxin C(max) and AUC(0-72 h) by 1.82- and 1.33-fold, respectively. Concentration-time profile comparisons indicated that digoxin elimination was unchanged by AZD5672, and the interaction was most likely to have resulted from inhibition of intestinal P-gp leading to increased digoxin absorption. The observed dose-dependent clinically significant interaction was accurately predicted using calculated [I(2)] and in vitro P-gp inhibition data, confirming AZD5672 to be a P-gp inhibitor in vivo.


Assuntos
Membro 1 da Subfamília B de Cassetes de Ligação de ATP/fisiologia , Benzenoacetamidas/farmacocinética , Interações Medicamentosas , Modelos Biológicos , Sulfonamidas/farmacocinética , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/antagonistas & inibidores , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/metabolismo , Administração Oral , Adolescente , Adulto , Benzenoacetamidas/administração & dosagem , Benzenoacetamidas/sangue , Transporte Biológico , Células CACO-2 , Digoxina/administração & dosagem , Digoxina/sangue , Digoxina/farmacologia , Desenho de Fármacos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estrutura Molecular , Especificidade por Substrato , Sulfonamidas/administração & dosagem , Sulfonamidas/sangue , Adulto Jovem
19.
Transfusion ; 51(6): 1300-13, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21575005

RESUMO

BACKGROUND: The purpose of this study was to perform a detailed analysis of the charges associated with chemomobilization and remobilization of autologous hematopoietic stem cells (HSCs) and to quantify medical costs and resource utilization associated with these procedures. STUDY DESIGN AND METHODS: Patients with lymphoma underwent chemomobilization with ifosfamide and etoposide with or without rituximab (IE ± R). Patients with multiple myeloma (MM) received a modified hyperfractionated cyclophosphamide, vincristine, doxorubicin, dexamethasone (hyper-CVAD) regimen after failing to mobilize with growth factors only. RESULTS: Between January 2004 and October 2006, 98 patients with lymphoma underwent HSC mobilization with IE ± R. Mobilization with IE ± R was effective, with 90.8% of patients collecting at least 2 × 10(6) CD34+ cells/kg. The total charges for treatment were $27,996 and $37,667 for patients mobilized with IE and IE + R, respectively. Hospital readmission for complications occurred in 26.5% of patients, resulting in additional charges of $10,356. The preapheresis procedure charge was estimated to be $2522, the charge for a 2-day apheresis session was $5160, and the postapheresis phase resulted in charges of $8040. Our analysis determined that reducing apheresis by 1 day has the potential to save $6600. We also performed a retrospective analysis of 16 patients with MM remobilized with a modified hyper-CVAD regimen. Remobilization was successful, with 87.5% of patients. Our analysis determined that mobilization, preapheresis, apheresis, and postapheresis phase charges were $24,968, $2522, $6158, and $12,060, respectively. CONCLUSIONS: Optimization of HSC mobilization regimens to reduce failure rates would not only benefit patients but also reduce the overall medical costs.


Assuntos
Mobilização de Células-Tronco Hematopoéticas/métodos , Linfoma/terapia , Mieloma Múltiplo/terapia , Transplante de Células-Tronco de Sangue Periférico/métodos , Transplante Autólogo/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Monoclonais Murinos/uso terapêutico , Antineoplásicos/uso terapêutico , Ciclofosfamida/uso terapêutico , Dexametasona/uso terapêutico , Doxorrubicina/uso terapêutico , Etoposídeo/uso terapêutico , Feminino , Humanos , Ifosfamida/uso terapêutico , Linfoma/tratamento farmacológico , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/tratamento farmacológico , Rituximab , Adulto Jovem
20.
Xenobiotica ; 41(9): 764-83, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21612343

RESUMO

Breast cancer resistance protein (BCRP) and multidrug resistance protein 2 (MRP2) can play a role in the absorption, distribution, metabolism, and excretion of drugs, impacting on the potential for drug-drug interactions. This study has characterized insect cell- and mammalian cell-derived ABC-transporter-expressing membrane vesicle test systems and validated methodologies for evaluation of candidate drugs as substrates or inhibitors of BCRP or MRP2. Concentration-dependent uptake of BCRP ([³H]oestrone 3-sulfate, [³H]methotrexate, [³H]rosuvastatin) and MRP2 ([³H]oestradiol 17ß-glucuronide, [³H]pravastatin, carboxydichlorofluorescein) substrates, and inhibitory potencies (IC50) of BCRP (sulfasalazine, novobiocin, fumitremorgin C) and MRP2 (benzbromarone, MK-571, terfenadine) inhibitors were determined. The apparent K(m) for probes [³H]oestrone 3-sulfate and [³H]oestradiol 17ß-glucuronide was determined in insect cell vesicles to be 7.4 ± 1.7 and 105 ± 8.3 µM, respectively. All other substrates exhibited significant uptake ratios. Positive control inhibitors sulfasalazine and benzbromarone gave IC50 values of 0.74 ± 0.18 and 36 ± 6.1 µM, respectively. All other inhibitors exhibited concentration-dependent inhibition. There was no significant difference in parameters generated between test systems. On the basis of the validation results, acceptance criteria to identify substrates/inhibitors of BCRP and MRP2 were determined for insect cell vesicles. The approach builds on earlier validations to support drug registration and extends from those cell-based systems to encompass assay formats using membrane vesicles.


Assuntos
Subfamília B de Transportador de Cassetes de Ligação de ATP/metabolismo , Transportadores de Cassetes de Ligação de ATP/metabolismo , Bioensaio/métodos , Interações Medicamentosas , Controle de Medicamentos e Entorpecentes , Membranas Artificiais , Proteínas de Neoplasias/metabolismo , Membro 2 da Subfamília G de Transportadores de Cassetes de Ligação de ATP , Trifosfato de Adenosina/metabolismo , Animais , Transporte Biológico , Soluções Tampão , Aprovação de Drogas , Estabilidade de Medicamentos , Insetos , Cinética , Controle de Qualidade , Reprodutibilidade dos Testes , Fatores de Tempo , Membro 4 da Subfamília B de Transportadores de Cassetes de Ligação de ATP
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