PubMed Health⌕ Search

Biomedical subjects

Bernard Lo

Publications and source records attributed to Bernard Lo.

At least 37 records · Page 2Linked to original sources
PubMed2004

Activation of hemostasis after coronary artery bypass grafting with or without cardiopulmonary bypass.

Activation of coagulation, fibrinolysis, and the vascular endothelium occurs after heart surgery with cardiopulmonary bypass (CPB), but the effects of eliminating CPB in patients undergoing coronary artery bypass grafting (CABG) are unknown. Therefore, we compared the hemostatic profiles of off-pump and on-pump CABG patients. Two groups of consecutive patients participating in a larger trial (the Octopus Trial) were randomly allocated to undergo CABG with (n = 20) or without (n = 20) CPB. Platelet numbers and plasma concentrations of P-selectin, prothrombin fragment 1.2 (F1.2), soluble fibrin, d-dimers, and von Willebrand factor (as a marker of endothelial cell activation) were measured and corrected for hemodilution. Compared with the on-pump CABG group, F1.2 and d-dimer levels were significantly lower (P = 0.004 and P = 0.03, respectively) in patients having CABG surgery performed off-pump. In the CPB group, F1.2 (median [interquartile range], 450% of baseline [233%-847%]) and d-dimer (538% [318%-1192%]) peaked in the immediate postoperative period and remained increased until Day 4, whereas in the off-pump group, F1.2 and d-dimer levels increased more gradually and peaked on Day 4 (342% [248%-515%] and 555% [387%-882%], respectively). In both groups, von Willebrand factor concentrations were increased until Day 4 (CPB, 308% [228%-405%]; off-pump, 288% [167%-334%]). Despite heparinization, CABG surgery with CPB was associated with excessive thrombin generation and fibrinolytic activity immediately after surgery. The off-pump group demonstrated a delayed postoperative response that became equal in magnitude to the CPB in the later (20-96 h) postoperative period.

Adult↗
PubMed2003

The impact of health information on the Internet on health care and the physician-patient relationship: national U.S. survey among 1.050 U.S. physicians.

BACKGROUND: Public use of the Internet for health information is increasing but its effect on health care is unclear. We studied physicians' experience of patients looking for health information on the Internet and their perceptions of the impact of this information on the physician-patient relationship, health care, and workload. METHODS: Cross-sectional survey of a nationally-representative sample of United States physicians (1050 respondents; response rate 53%). RESULTS: Eighty-five percent of respondents had experienced a patient bringing Internet information to a visit. The quality of information was important: accurate, relevant information benefited, while inaccurate or irrelevant information harmed health care, health outcomes, and the physician-patient relationship. However, the physician's feeling that the patient was challenging his or her authority was the most consistent predictor of a perceived deterioration in the physician-patient relationship (OR = 14.9; 95% CI, 5.5-40.5), in the quality of health care (OR = 3.4; 95% CI, 1.1-10.9), or health outcomes (OR = 5.6; 95% CI, 1.7-18.7). Thirty-eight percent of physicians believed that the patient bringing in information made the visit less time efficient, particularly if the patient wanted something inappropriate (OR = 2.5; 95% CI, 1.5-4.4), or the physician felt challenged (OR = 3.6; 95% CI, 1.8-7.2). CONCLUSIONS: The quality of information on the Internet is paramount: accurate relevant information is beneficial, while inaccurate information is harmful. Physicians appear to acquiesce to clinically-inappropriate requests generated by information from the Internet, either for fear of damaging the physician-patient relationship or because of the negative effect on time efficiency of not doing so. A minority of physicians feels challenged by patients bringing health information to the visit; reasons for this require further research.

Adult↗
PubMed2003

Medicine. Consent from donors for embryo and stem cell research.

As research with human embryos and embryonic stem cells proceeds, the authors of this Policy Forum argue that all donors of biological materials should give informed consent, including oocyte and sperm donors. Informed consent is particularly important because of the diverse opinions and strong emotions that surround such research. Some gamete donors who are willing to help women and couples bear children may object to the use of their genetic materials for certain types of research.

Embryo Research↗
PubMed2003

The impact of health information on the internet on the physician-patient relationship: patient perceptions.

BACKGROUND: Use of the Internet for health information continues to grow rapidly, but its impact on health care is unclear. Concerns include whether patients' access to large volumes of information will improve their health; whether the variable quality of the information will have a deleterious effect; the effect on health disparities; and whether the physician-patient relationship will be improved as patients become more equal partners, or be damaged if physicians have difficulty adjusting to a new role. METHODS: Telephone survey of nationally representative sample of the American public, with oversample of people in poor health. RESULTS: Of the 3209 respondents, 31% had looked for health information on the Internet in the past 12 months, 16% had found health information relevant to themselves and 8% had taken information from the Internet to their physician. Looking for information on the Internet showed a strong digital divide; however, once information had been looked for, socioeconomic factors did not predict other outcomes. Most (71%) people who took information to the physician wanted the physician's opinion, rather than a specific intervention. The effect of taking information to the physician on the physician-patient relationship was likely to be positive as long as the physician had adequate communication skills, and did not appear challenged by the patient bringing in information. CONCLUSIONS: For health information on the Internet to achieve its potential as a force for equity and patient well-being, actions are required to overcome the digital divide; assist the public in developing searching and appraisal skills; and ensure physicians have adequate communication skills.

Adolescent↗
PubMed2003

Oversight of quality improvement: focusing on benefits and risks.

Quality improvement (QI) may substantially improve patient outcomes while posing little risk to subjects. However, the term quality improvement is used to refer to a broad range of projects, which vary widely in the potential benefits and risks to participants. Some projects raise ethical concerns. An explicit protocol for the ethical review of QI would benefit both patients and leaders of QI projects. If a project is considered research rather than QI, review by an institutional review board and informed consent from subjects may be required. In contrast, QI projects may require little oversight beyond what is already in place for clinical care. However, a monolithic approach to oversight of QI is inappropriate in light of the variation in benefits and risks of QI projects and their overlap with research. The key ethical issue is not the classification of a project as QI or research, but the balance of anticipated benefits and harms in the project. We propose a protocol for independent review of QI projects and patient consent that will protect subjects from serious harm while encouraging QI projects that will substantially benefit participants and pose only minimal risk.

Ethical Review↗
PubMed2003

Responding to requests regarding prayer and religious ceremonies by patients near the end of life and their families.

Prayer and religious ceremonies may help patients near the end of life and their relatives find comfort and discover meaning in their lives. In this paper, we analyze how physicians might respond in two situations regarding prayer and religious ceremonies. First, how should physicians respond when such patients or their families ask physicians to pray for them or with them? Physicians' responses to such requests will depend on their own religious and spiritual beliefs, the congruence of their beliefs with those of the patient and family, and their relationship with the patient. Many physicians may be willing to be present and stand silently while the patient prays. Second, how should physicians respond when such patients and families seek to carry out their religious and spiritual practices in the hospital? Religious ceremonies can provide meaning, hope, and solace to patients and families. Institutional guidelines regarding religious ceremonies should allow as much leeway as is compatible with good care both for the patient for whom the ritual is offered and also for other patients within the facility. Physicians should inquire whether there are religious and spiritual practices that patients and families would like to engage in. However, physicians should be cautious about recommending specific ceremonies or pratices. Physicians can respond to requests and respect patients' spiritual needs in ways that may deepen the therapeutic doctor-patient relationship, without compromising their own religious and spiritual beliefs or professional roles.

Ethics, Medical↗
PubMed2003

The roles and experiences of nonaffiliated and non-scientist members of institutional review boards.

PURPOSE: Little is known about the roles and experiences of non-scientist and nonaffiliated institutional review board (IRB) members (also known as lay members), and what contributions they are making to IRBs. This study investigated the experiences of IRB lay members from leading academic medical institutions in the United States and presents their recommendations for future education and training. METHOD: In 2000, the authors randomly selected and contacted 20 IRBs. From the 11 IRBs that agreed to participate, a total of 32 lay members participated in telephone interviews in which they were asked open-ended questions about the types of initial and ongoing education they had received, their interactions with scientific members, their contributions, the problems they experienced on the IRB, and recommendations for future education and training. RESULTS: Participants believed their role was to represent the community of human subjects, and 94% reported that their main contribution was simplifying the consent forms. Although 94% of participants had positive experiences working with scientist IRB members, 88% occasionally had been intimidated and felt disrespected by them. Forty-seven percent of participants identified lack of education and training as a problem, and 78% wanted more intensive education and training for future non-scientist/nonaffiliated members. CONCLUSION: IRB reform should include better training for non-scientist and nonaffiliated members so that they can take on more active roles. In addition, measures are needed to strengthen the relationships between scientist and non-scientist and nonaffiliated members.

Education↗
PubMed2002

Strategies for culturally effective end-of-life care.

As a result of profound worldwide demographic change, physicians will increasingly care for patients from cultural backgrounds other than their own. Differences in beliefs, values, and traditional health care practices are of particular relevance at the end of life. Health care providers and patients and families may not have shared understandings of the meaning of illness or death and may not agree on the best strategies to plan for the end of life or to alleviate pain and suffering. Good end-of-life care may be complicated by disagreements between physicians and patients, difficult interactions, or decisions the physician does not understand. Challenges may result from cultural differences between the patient's background and traditional medical practice. Values so ingrained in physicians as to be unquestioned may be alien to patients from different backgrounds. Physicians need to be sensitive to cultural differences and to develop the skills necessary to work with patients from diverse backgrounds. Community and cultural ties provide a source of great comfort as patients and families prepare for death. This paper describes two cases that raise issues about cross-cultural end-of-life practice and suggests strategies for negotiating common problems. Physicians should assess the cultural background of each patient and inquire about values that may affect care at the end of life. They should become aware of the specific beliefs and practices of the populations they serve, always remembering to inquire whether an individual patient adheres to these cultural beliefs. Attention to cultural difference enables the physician to provide comprehensive and compassionate palliative care at the end of life.

Advance Directives↗