Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Resultados 1 - 20 de 28
Filtrar
1.
J Clin Ethics ; 35(1): 37-53, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38373330

RESUMEN

AbstractThe assumption in current U.S. mainstream medicine is that birthing requires hospitalization. In fact, while the American College of Obstetricians and Gynecologists supports the right of every birthing person to make a medically informed decision about their delivery, they do not recommend home birth owing to data indicating greater neonatal morbidity and mortality. In this article, we examine the evidence surrounding home birth in the United States and its current limitations, as well as the ethical considerations around birth setting.


Asunto(s)
Parto Domiciliario , Embarazo , Femenino , Recién Nacido , Estados Unidos , Humanos , Hospitalización
2.
J Clin Ethics ; 35(1): 23-36, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38373331

RESUMEN

AbstractBackground: Little is known about U.S. healthcare provider views and practices regarding evidence, counseling, and shared decision-making about in-hospital versus out-of-hospital birth settings. METHODS: We conducted 19 in-depth, semistructured, qualitative interviews of eight obstetricians, eight midwives, and three pediatricians from across the United States. Interviews explored healthcare providers' interpretation of the current evidence and their personal and professional experiences with childbirth within the existing medical, ethical, and legal context in the United States. RESULTS: Themes emerged concerning risks and benefits, decision-making, and patient-provider power dynamics. Collectively, the narratives illuminated fundamental ideological tensions between in- and out-of-hospital providers arising from divergent assignment of value to described risks and benefits. The majority of physicians focused on U.S.-specific data demonstrating increased neonatal morbidity and mortality associated with delayed access to hospital-based interventions, thereby justifying hospital birth as the standard of care. By contrast, midwives emphasized data demonstrating fewer interventions and superior maternal and neonatal outcomes in high-income European countries, where out-of-hospital birth is more common for low-risk birthing people. A key gap in counseling was revealed, as no interviewees offered anticipatory counseling regarding birth setting options. Providers directly and indirectly illustrated the propensity for asymmetric power relations between birth providers and pregnant people, especially in hospital settings. CONCLUSIONS: The narratives highlight the common goal of optimizing maternal and neonatal outcomes despite tensions arising from divergent prioritization of specific maternal and neonatal risks. Our findings suggest opportunities to foster collaboration and optimize outcomes via mutual respect and improved integration of care.


Asunto(s)
Personal de Salud , Médicos , Embarazo , Femenino , Recién Nacido , Humanos , Estados Unidos , Entorno del Parto , Motivación
3.
Matern Child Health J ; 27(1): 101-110, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36352278

RESUMEN

INTRODUCTION: Routine prenatal screening ultrasounds primarily serve to diagnose major fetal anomalies which may prompt further testing and inform clinical decision-making, including possible pregnancy termination. Meanwhile, expectant parents may view the ultrasound experience and information gained differently from their clinicians. In this setting, how to best counsel patients, especially regarding the increasing findings of indeterminant clinical significance, is unclear. Greater understanding of women's views before undergoing their ultrasound may help to guide anticipatory counseling about the purpose of screening and interpretation of results. METHODS: We surveyed 289 patients presenting for scheduled prenatal ultrasounds at an academic tertiary care center. Discrete and open-ended questions assessed views surrounding the receipt of abnormal results and management of the pregnancy once fetal anomalies are detected. Qualitative responses were analyzed using thematic analysis. RESULTS: Most (95%) desired information about abnormal sonographic findings, although only half would consider pregnancy termination for anomalies. Reasons for wanting return of abnormal results included preparedness, valuing knowledge, and to a lesser extent, informing decision-making. When considering potential termination as a result of ultrasound findings, participants' rationales demonstrated deontological (seeing termination as inherently impermissible or permissible), relational (duties arising from the role of being a mother), and consequentialist (weighing harms and benefits) reasoning. CONCLUSION: This study highlights women's perceptions of prenatal ultrasounds as an inherently valuable source of information and preparedness, beyond their role in informing clinical decision-making. Identifying the ethical constructs underpinning patients' perspectives may help direct development of counseling tools responsive to individual needs and values regarding prenatal ultrasound findings.


Asunto(s)
Aborto Inducido , Mujeres Embarazadas , Femenino , Embarazo , Humanos , Mujeres Embarazadas/psicología , Diagnóstico Prenatal , Consejo , Ultrasonografía Prenatal
4.
Sex Transm Dis ; 49(6): e70-e74, 2022 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-34772894

RESUMEN

ABSTRACT: The harms of implicit bias in clinical settings are acknowledged but poorly understood and difficult to overcome. We discuss how structural components of electronic medical record (EMR) user interfaces may contribute to sex and gender-based discrimination against patients via constant, duplicative presentation of stigmatizing sexually transmitted infection (STI) data irrespective of clinical significance. Via comparison with symbolism and representative quotes in Hawthorne's 1850 novel The Scarlet Letter, we propose a metaphor to examine how EMRs function as a platform for moral judgment, which may display an indelible "scarlet letter" for pregnant patients with STI history. We consider whether current depictions of STIs in EMRs are structurally unjust and may contribute to biased treatment by directing attention to violations of hegemonic sex/gender norms regarding sexual behavior and thus triggering moral judgments of maternal fitness. We conclude with recommendations for how to address these challenges to improve ethical stewardship of sensitive sexual/reproductive health data.


Asunto(s)
Infecciones por VIH , Salud Sexual , Enfermedades de Transmisión Sexual , Registros Electrónicos de Salud , Femenino , Humanos , Masculino , Conducta Sexual , Enfermedades de Transmisión Sexual/epidemiología
5.
Matern Child Health J ; 25(5): 802-812, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33392932

RESUMEN

INTRODUCTION: Prenatal ultrasounds often yield indeterminate (incomplete or minor abnormality) findings with limited clinical utility. We evaluate impact of indeterminate findings on maternal anxiety. METHODS: A single-U.S.-center prospective cohort study administered the Perinatal Anxiety Screening Scale (PASS; control mean = 13.4; > 20 denotes clinically significant anxiety) before and after prenatal ultrasounds in February-May 2017. Ultrasound reports were coded as: normal; indeterminate; or major abnormality. Primary outcome was anxiety after indeterminate vs. normal ultrasounds. Secondary outcomes included anxiety change from pre-to-post-ultrasound and relative to women's characteristics. Linear regression adjusted for confounders. RESULTS: Of 286 ultrasounds, 51.0% were normal, 40.5% indeterminate (22.0% incomplete; 18.5% minor abnormality), and 8.0% major abnormalities. Indeterminate findings were unrelated to age, race, parity, infertility, or psychiatric history, but associated with gestational age (26.6%/45.0%/52.5% for first/second/third trimesters; p < 0.001), and obesity (48.8 vs. 37.0%; p = 0.031). Pretest anxiety was highest in second/third trimesters (p = 0.029), and in subjects aged age ≤ 24 or younger(p < 0.001), with a history of anxiety (p < 0.001),) or with prior pregnancy loss (p = 0.011). Mean anxiety score decreased pre-to-posttest across all groups. Indeterminate findings were associated with higher PASS scores than normal findings: pretest 20.1 vs. 16.4 (p = 0.026) and posttest 16.9 vs. 12.2 (p = 0.009; adjusted-p = 0.01). Versus normal ultrasounds, incomplete findings were associated with higher post-ultrasound anxiety (p = 0.007; adjusted-p = 0.01) and smaller decreases from pre-to-posttest (adjusted-p = 0.03), whereas minor abnormalities had higher pretest anxiety (p = 0.029) with larger pre-to-posttest decreases (adjusted-p =0.010). DISCUSSION: Indeterminate ultrasounds, especially incomplete findings, are associated with significantly higher anxiety than normal findings, suggesting need for evidence-based counseling, management and strategies for decreasing number of indeterminate results.


Asunto(s)
Trastornos de Ansiedad , Ultrasonografía Prenatal , Anciano , Ansiedad/epidemiología , Trastornos de Ansiedad/diagnóstico , Trastornos de Ansiedad/epidemiología , Femenino , Humanos , Embarazo , Tercer Trimestre del Embarazo , Estudios Prospectivos
6.
J Med Ethics ; 46(10): 674-677, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32054774

RESUMEN

In the USA, there are missed opportunities to diagnose hepatitis C virus (HCV) in pregnancy because screening is currently risk-stratified and thus primarily limited to individuals who disclose history of injection drug use or sexually transmitted infection risks. Over the past decade, the opioid epidemic has dramatically increased incidence of HCV and a feasible, well-tolerated cure was introduced. Considering these developments, recent evidence suggests universal HCV screening in pregnancy would be cost-effective and several professional organisations have called for updated national policy. Historically, universal screening has been financially disincentivised on the healthcare system level, particularly since new diagnoses may generate an obligation to provide expensive treatments to a population largely reliant on public health resources. Here, we provide ethical arguments supporting universal HCV screening in pregnancy grounded in obligations to respect for persons, beneficence and justice. First, universal prenatal HCV screening respects pregnant women as persons by promoting their long-term health outside of pregnancy. Additionally, universal screening would optimise health outcomes within current treatment guidelines and may support research on treatment during pregnancy. Finally, universal screening would avoid potential harms of risk-stratifying pregnant women by highly stigmatised substance use and sexual behaviours.


Asunto(s)
Hepatitis C , Abuso de Sustancias por Vía Intravenosa , Femenino , Promoción de la Salud , Hepatitis C/diagnóstico , Humanos , Tamizaje Masivo , Embarazo , Mujeres Embarazadas
7.
Matern Child Nutr ; 16(4): e13033, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32458558

RESUMEN

The World Health Organization (WHO) has provided detailed guidance on the care of infants of women who are persons under investigation (PUI) or confirmed to have COVID-19. The guidance supports immediate post-partum mother-infant contact and breastfeeding with appropriate respiratory precautions. Although many countries have followed WHO guidance, others have implemented infection prevention and control (IPC) policies that impose varying levels of post-partum separation and discourage or prohibit breastfeeding or provision of expressed breast milk. These policies aim to protect infants from the potential harm of infection from their mothers, yet they may fail to fully account for the impact of separation. Global COVID-19 data are suggestive of potentially lower susceptibility and a typically milder course of disease among children, although the potential for severe disease in infancy remains. Separation causes cumulative harms, including disrupting breastfeeding and limiting its protection against infectious disease, which has disproportionate impacts on vulnerable infants. Separation also presumes the replaceability of breastfeeding-a risk that is magnified in emergencies. Moreover, separation does not ensure lower viral exposure during hospitalizations and post-discharge, and contributes to the burden on overwhelmed health systems. Finally, separation magnifies maternal health consequences of insufficient breastfeeding and compounds trauma in communities who have experienced long-standing inequities and violence, including family separation. Taken together, separating PUI/confirmed SARS-CoV-2-positive mothers and their infants may lead to excess preventable illnesses and deaths among infants and women around the world. Health services must consider the short-andlong-term impacts of separating mothers and infants in their policies.


Asunto(s)
Lactancia Materna , COVID-19/prevención & control , COVID-19/transmisión , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Aislamiento de Pacientes , SARS-CoV-2 , Lactancia Materna/efectos adversos , Lactancia Materna/psicología , Femenino , Humanos , Lactante , Recién Nacido , Leche Humana , Relaciones Madre-Hijo/psicología , Madres , Aislamiento de Pacientes/psicología , Organización Mundial de la Salud
12.
Clin Perinatol ; 51(4): 801-816, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-39487021

RESUMEN

In 2023, US guidelines for feeding perinatally human immunodeficiency virus (HIV)-exposed infants were revised to encourage collaborative decision-making in lieu of categorical proscription of breastfeeding. This change advances autonomy and health equity for persons living with HIV in the United States, for the first time supporting those who prioritize the maternal and infant benefits of breastfeeding in the setting of effective, well-established HIV risk mitigation. The authors review key moral dilemmas facing clinicians and patients who must navigate the reversal of longstanding dogma against breastfeeding and provide recommendations for implementation of a new ethical paradigm.


Asunto(s)
Lactancia Materna , Infecciones por VIH , Transmisión Vertical de Enfermedad Infecciosa , Humanos , Estados Unidos , Recién Nacido , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Transmisión Vertical de Enfermedad Infecciosa/ética , Femenino , Lactante , Toma de Decisiones Conjunta , Toma de Decisiones/ética
13.
Artículo en Inglés | MEDLINE | ID: mdl-38715762

RESUMEN

Introduction: Scientists use donated biospecimens to create organoids, which are miniature copies of patient tumors that are revolutionizing precision medicine and drug discovery. However, biobanking platforms remove donor identifiers to protect privacy, precluding patients from benefiting from their contributions or sharing information that may be relevant to research outcomes. Decentralized biobanking (de-bi) leverages blockchain technology to empower patient engagement in biospecimen research. We describe the creation of the first de-bi prototype for an organoid biobanking use case. Methods: We designed and developed a proof-of-concept non-fungible tokens (NFTs) framework for an organoid research network of patients, physicians, and scientists within a synthetic dataset modeled on a real-world breast cancer organoid ecosystem. Our implementation deployed multiple smart contracts on Ethereum test networks, minting NFTs representing each stakeholder, biospecimen, and organoid. The system architecture was designed to be composable with established biobanking programs. Results: Our de-bi prototype demonstrated how NFTs representing patients, physicians, scientists, and organoids may be united in a privacy-preserving platform that builds upon relationships and transactions of existing biobank research networks. The mobile application simulated key features, enabling patients to track their biospecimens, view organoid images and research updates from scientists, and allow physicians to participate in peer-to-peer communications with basic scientists and patients alike, all while ensuring compliance with de-identification requirements. Discussion: We demonstrate proof-of-concept for a web3 platform engaging patients, physicians, and scientists in a dynamic research community, unlocking value for a model organoid ecosystem. This initial prototype is a critical first step for advancing paradigm-shifting de-bi technology that provides unprecedented transparency and suggests new standards for equity and inclusion in biobanking. Further research must address feasibility and acceptability considering the ethical, legal, economic, and technical complexities of organoid research and clinical translation.

14.
J Law Med Ethics ; 50(2): 339-347, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35894577

RESUMEN

Research on opioid use in pregnancy is critically important to understand how the opioid epidemic has affected a generation of children, but also raises significant ethical and legal challenges. Embedded ethicists can help to fill the gaps in ethics oversight for such research, but further guidance is needed to help strike the balance between integration and independence.


Asunto(s)
Analgésicos Opioides , Eticistas , Niño , Femenino , Humanos , Embarazo
15.
Learn Health Syst ; 6(3): e10303, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35860318

RESUMEN

Introduction: Critical for advancing a Learning Health System (LHS) in the U.S., a regulatory safe harbor for deidentified data reduces barriers to learning from care at scale while minimizing privacy risks. We examine deidentified data policy as a mechanism for synthesizing the ethical obligations underlying clinical care and human subjects research for an LHS which conceptually and practically integrates care and research, blurring the roles of patient and subject. Methods: First, we discuss respect for persons vis-a-vis the systemic secondary use of data and tissue collected in the fiduciary context of clinical care. We argue that, without traditional informed consent or duty to benefit the individual, deidentification may allow secondary use to supersede the primary purpose of care. Next, we consider the effectiveness of deidentification for minimizing harms via privacy protection and maximizing benefits via promoting learning and translational care. We find that deidentification is unable to fully protect privacy given the vastness of health data and current technology, yet it imposes limitations to learning and barriers for efficient translation. After that, we evaluate the impact of deidentification on distributive justice within an LHS ethical framework in which patients are obligated to contribute to learning and the system has a duty to translate knowledge into better care. Such a system may permit exacerbation of health disparities as it accelerates learning without mechanisms to ensure that individuals' contributions and benefits are fair and balanced. Results: We find that, despite its established advantages, system-wide use of deidentification may be suboptimal for signaling respect, protecting privacy or promoting learning, and satisfying requirements of justice for patients and subjects. Conclusions: Finally, we highlight ethical, socioeconomic, technological and legal challenges and next steps, including a critical appreciation for novel approaches to realize an LHS that maximizes efficient, effective learning and just translation without the compromises of deidentification.

16.
J Cannabis Res ; 4(1): 20, 2022 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-35413889

RESUMEN

BACKGROUND: The US guidelines recommend avoiding marijuana during breastfeeding given concerns about infant's neurodevelopment. In this setting, some physicians and hospitals recommend against or prohibit breastfeeding when marijuana use is detected during pregnancy. However, breastfeeding is beneficial for infants and women, and stigmatization of substance use in pregnancy has been historically linked to punitive approaches with a disproportionate impact on minority populations. We advance an empirically informed ethical analysis of this issue. METHODS: First, we performed a retrospective cross-sectional qualitative study of prenatal and postpartum records from a random sample of 150 women delivered in an academic hospital system in 2017 to provide evidence and context regarding breastfeeding management in relation to marijuana use. We then perform a scoping literature review on infant risks from breastmilk marijuana exposure and risks associated with not breastfeeding for infants and women. Finally, we analyze this issue vis-a-vis ethical principles of beneficence, autonomy, and justice. RESULTS: (1) Medical records reveal punitive language pertaining to the medicinal use of marijuana in pregnancy and misinterpretation of national guidelines, e.g., "patient caught breastfeeding and instructed to stop." (2) Though there are plausible neurodevelopmental harms from breastmilk exposure to THC, evidence of infant effects from breastmilk exposure to marijuana is limited and largely confounded by concomitant pregnancy exposure and undisclosed exposures. By contrast, health benefits of breastfeeding for women and infants are well-established, as are harms of forgoing breastfeeding. (3) Discouraging breastfeeding for women with marijuana use in pregnancy contradicts beneficence, as it neglects women's health considerations and incorrectly assumes that risks exceed benefits for infants. Restrictive hospital practices (e.g., withholding lactation support) compromise maternal autonomy and exploit power asymmetry between birthing persons and institutions, particularly when compulsory toxicology screening prompts child welfare investigations. Finally, recommending against breastfeeding during prenatal care and imposing restrictions during postpartum hospitalization may exacerbate racial disparities in breastfeeding and related health outcomes. CONCLUSIONS: Policy interpretations which discourage rather than encourage breastfeeding among women who use of marijuana may cause net harm, compromise autonomy, and disproportionately threaten health and wellbeing of underserved women and infants.

17.
JMIR Bioinform Biotechnol ; 2(1): e29905, 2021 Oct 22.
Artículo en Inglés | MEDLINE | ID: mdl-38943235

RESUMEN

Henrietta Lacks' deidentified tissue became HeLa cells (the paradigmatic learning health platform). In this article, we discuss separating research on Ms Lacks' tissue from obligations to promote respect, beneficence, and justice for her as a patient. This case illuminates ethical challenges for the secondary use of biospecimens, which persist in contemporary learning health systems. Deidentification and broad consent seek to maximize the benefits of learning from care by minimizing burdens on patients, but these strategies are insufficient for privacy, transparency, and engagement. The resulting supply chain for human cellular and tissue-based products may therefore recapitulate the harms experienced by the Lacks family. We introduce the potential for blockchain technology to build unprecedented transparency, engagement, and accountability into learning health system architecture without requiring deidentification. The ability of nonfungible tokens to maintain the provenance of inherently unique digital assets may optimize utility, value, and respect for patients who contribute tissue and other clinical data for research. We consider the potential benefits and survey major technical, ethical, socioeconomic, and legal challenges for the successful implementation of the proposed solutions. The potential for nonfungible tokens to promote efficiency, effectiveness, and justice in learning health systems demands further exploration.

18.
Obstet Gynecol ; 138(5): 755-761, 2021 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-34619743

RESUMEN

OBJECTIVE: Fetal tissue research has driven significant medical advances but remains publicly contentious in the United States. The views of pregnant individuals in the United States regarding the donation of fetal tissue offer an important and previously unexplored perspective on this issue. METHODS: We conducted a secondary analysis of data from two separate, broader qualitative studies. Pregnant and recently pregnant individuals (N=79) from clinical sites at the University of North Carolina at Chapel Hill, Johns Hopkins University, and Massachusetts General Hospital were interviewed individually using a semi-structured guide addressing a range of issues related to infectious disease research and pregnancy, including the acceptability of fetal tissue research. Interviews were transcribed, coded, and analyzed for emergent themes. RESULTS: Among this sample of predominantly Black (61%), reproductive-aged pregnant and recently pregnant participants, the majority (72%) generally supported fetal tissue research. The following three themes were identified: choice, respect, and meaning. Respondents discussed the deeply personal nature of decisions surrounding fetal tissue research, emphasizing the importance of informed consent and respect for the person's emotional state when approaching for consent. The ways in which participants regarded how to respectfully handle fetal tissue also shaped views about the acceptability of donation, both for and against. For many participants, fetal tissue donation to research represented one way of ascribing meaning to pregnancy termination or loss. CONCLUSION: Among this diverse sample of pregnant and recently pregnant individuals, most were supportive of fetal tissue donation for research. A better understanding of pregnant individuals' views on this topic may lead to policies and practices that are congruent with the needs and values of people facing decisions regarding the disposition of fetal remains.


Asunto(s)
Investigación Fetal , Feto , Mujeres Embarazadas/psicología , Aborto Inducido , Adulto , Femenino , Humanos , Consentimiento Informado , Entrevistas como Asunto , Persona de Mediana Edad , Políticas , Embarazo , Investigación Cualitativa , Factores Sociodemográficos , Estados Unidos , Adulto Joven
19.
Health Equity ; 4(1): 406-409, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33015520

RESUMEN

During the Coronavirus (COVID-19) pandemic, in-person interpreters have been deemed "nonessential," and thus eliminated to minimize viral exposure and conserve personal protective equipment. Considering alarming patterns of interpreter underuse, we evaluate how substitution for remote modalities (telephone or video) may exacerbate existing inequalities for patients with limited English proficiency. The inherent intimacy, dynamic physicality, and cultural nuances of labor and delivery pose unique communication challenges. Using clinical scenarios, we illustrate the vital role interpreters have in providing accessible obstetric care. We argue that eliminating in-person interpreters in this setting is not justified by COVID-related harms given the potential to exacerbate underlying health disparities.

20.
Health Equity ; 4(1): 345-352, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32908955

RESUMEN

Purpose: People living with human immunodeficiency virus, hepatitis B virus, or hepatitis C virus (PLHIV/HBV/HCV) face barriers to assisted reproductive technologies (ART), in part, due to laws and professional regulations mandating dedicated laboratory facilities and storage tanks for reproductive tissue to minimize theoretical risk of cross-contamination. These guidelines greatly increase the expense of providing equal care, however, fertility clinics are neither required to treat nor disclose whether they treat PLHIV/HBV/HCV. Clinics' websites are an important source of information regarding available services for prospective patients and referring providers. We assessed whether clinic websites disclose availability of ART for PLHIV/HBV/HCV. Methods: Websites for Society for Assisted Reproductive Technology-accredited clinics in Northeast and South Atlantic United States were searched systematically for HIV-, HBV-, or HCV-specific content. Qualitative and thematic analysis was performed. Clinic characteristics (annual volume, practice setting) were collected. Results: Of 136 websites, nine (6.6%) had information relevant to PLHIV seeking infertility treatment, and seven (5.1%) offered at least some treatments. Three clinics (2.2%) also mentioned treatment information relevant for PLHBV/HCV, one of which offered treatment. Information was often difficult to find or interpret. By contrast, 77/136 (56.6%) of clinics mentioned universally screening patients for HIV and 77/136 (56.6%) mentioned screening for HBV/HCV before ART. Conclusion: Given economic disincentives to providing ART to PLHIV/HBV/HCV under current guidelines, the paucity of clinics openly offering treatment suggests a troubling lack of transparency or, possibly, a lack of available care. Further research should examine the impact of current guidelines and whether dedicated facilities and storage are medically indicated.

SELECCIÓN DE REFERENCIAS
Detalles de la búsqueda